CN-121990503-A - Flexible positioning device for pallet truck fork frame

CN121990503ACN 121990503 ACN121990503 ACN 121990503ACN-121990503-A

Abstract

The application discloses a flexible positioning device of a pallet truck fork frame, which comprises a fork root positioning mechanism and a fork tip positioning mechanism which are sequentially and slidably arranged along the length direction of a positioning platform, wherein the fork root positioning mechanism and the fork tip positioning mechanism respectively comprise two moving assemblies which are relatively and slidably arranged, each moving assembly comprises a driving device and an outer stop block which are relatively arranged, the fork root positioning mechanism also comprises a pressing plate assembly which is arranged above the space between the two moving assemblies, the fork tip positioning mechanism also comprises a connecting shaft which is used for penetrating through a fork tip shaft hole on a pallet fork to be fixed, a group of fork frame positioning mechanisms which are symmetrically and slidably arranged on the positioning platform and are used for respectively positioning two ends of the fork frame, each fork frame positioning mechanism comprises a connecting column, and a supporting part which is used for supporting the bottom end of the fork frame and a propping piece which is used for compacting the end part of the fork frame are arranged on the connecting column. The positioning device provided by the application omits a manual scribing process, greatly reduces labor intensity, improves working efficiency and improves welding quality.

Inventors

WANG QUAN
LIU DANDAN
DU HONGYU
LU CHAOPENG
Ling Wuji

Assignees

安徽合力股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260310

Claims (12)

1. The flexible positioning device of the pallet truck fork frame comprises a positioning platform (1) and is characterized in that a fork root positioning mechanism (3) and a fork tip positioning mechanism (4) are sequentially arranged on the top end surface of the positioning platform (1) in a sliding manner along the length direction; The fork root positioning mechanism (3) and the fork tip positioning mechanism (4) comprise two relatively sliding moving assemblies, each moving assembly comprises a driving device and an outer stop block which are oppositely arranged, and a containing groove for placing a fork is formed between the driving device and the outer stop block; the fork root positioning mechanism (3) further comprises a pressing plate assembly arranged above the two moving assemblies, and the fork tip positioning mechanism (4) further comprises a connecting shaft (46) used for penetrating through a fork tip shaft hole (721) on the fork to be fixed; The fork positioning mechanism (5) is symmetrically and slidably arranged on a positioning platform (1) positioned on the outer side of the fork root positioning mechanism (3), a group of fork positioning mechanisms (5) are respectively arranged at two ends of a fork frame (71), each fork frame positioning mechanism (5) comprises a connecting column (53), and a supporting part for supporting the bottom end of the fork frame (71) and a supporting piece (56) for pressing the end part of the fork frame (71) are arranged on the connecting column (53).
2. The flexible positioning device of the pallet truck fork frame according to claim 1, wherein a pressing mechanism (6) for pressing the upper surface of the fork is arranged on a positioning platform (1) between a fork root positioning mechanism (3) and a fork tip positioning mechanism (4); The compressing mechanism (6) comprises a fixing rod (62) which is connected to the positioning platform in a threaded mode, a long pressing plate (61) is horizontally arranged at the top end of the fixing rod (62), a locking button is connected to the fixing rod (62) above the long pressing plate (61) in a threaded mode, and the height of the fixing rod (62) is adjusted, so that the long pressing plate (61) compresses the upper surface of the fork.
3. The flexible positioning device of the pallet truck fork frame, as set forth in claim 1, wherein the positioning platform (1) comprises an operation table (12) fixedly arranged on the base (11), a group of slide rails (14) are fixedly arranged on the operation table (12) along the length direction, and a positioning block (13) for positioning and connecting the fork root positioning mechanism (3) and the fork tip positioning mechanism (4) is fixedly arranged on the positioning platform (1) positioned outside the slide rails (14).
4. The flexible positioning device of the pallet truck fork frame according to claim 1, wherein a movable supporting mechanism (16) is arranged on an operating platform (12) which is far away from the fork root positioning mechanism (3) and is used for supporting the bottom of the fork; The movable supporting mechanism (16) comprises an elastic piece fixedly arranged at the bottom end inside the connecting cylinder (162), a mandrel (163) is arranged above the spring positioning piece, the top end of the mandrel (163) is in threaded connection with a jack post (165) arranged outside the connecting cylinder (162), a rotating piece (166) is movably arranged on the outer side wall of the connecting cylinder (162), the rotating piece (166) is screwed out, the mandrel (163) moves upwards with the jack post (165) due to the elasticity of the elastic piece, and the mandrel (163) is supported after the rotating piece (166) is screwed into contact with the outer side wall of the mandrel (163), so that the jack post (165) is prevented from moving downwards.
5. The flexible positioning device for a pallet truck fork frame according to claim 4, wherein the connecting cylinder (162) is fixedly arranged on the operating platform (12) through the mounting seat (161), an open top cover (164) is sleeved at the top end of the connecting cylinder (162), the top column (165) moves up and down along the opening in the top cover, a groove is formed in the middle of the top end of the mandrel (163), and the groove wall at the periphery of the groove is positioned below the top cover (164) so as to prevent the mandrel (163) from moving up.
6. The flexible positioning device of pallet truck fork frame according to claim 1, wherein the fork root positioning mechanism (3) comprises a first bottom plate (31) which is slidably mounted on the positioning platform (1), the driving device and the outer baffle block are mounted on a first movable plate (32), and the first movable plate (32) is mounted on the first bottom plate (31) through a first sliding component (33) and moves along the first bottom plate; The pressing plate assembly comprises a fixing frame (362) fixedly arranged on a positioning platform (1) between the two moving assemblies, and an upper pressing plate (361) for pressing the upper surface of the fork is detachably arranged on the fixing frame (362).
7. A flexible positioning device for a pallet truck fork frame according to claim 1, wherein the fork tip positioning mechanism (4) comprises a second bottom plate (41) which is slidably mounted on the positioning platform (1), the driving device and the outer baffle are mounted on a second movable plate (42), the second movable plate (42) is mounted on the second bottom plate (41) through a second sliding component (43) and moves along the second bottom plate, and a long shaft locking component (45) is fixedly arranged on the second movable plate (42) and used for fixing a connecting shaft (46).
8. A flexible positioning device for a pallet truck fork frame according to claim 7, wherein the long shaft locking assembly (45) comprises U-shaped cushion blocks (454) for bearing the connecting shafts (46), locking seats (451) and locking blocks (452) which are arranged on two sides of the U-shaped cushion blocks (454), and one end of each locking block (452) is rotatably connected to one locking seat (451) for locking or releasing the connecting shafts (46) arranged on the U-shaped cushion blocks (454).
9. The flexible positioning device for the pallet truck fork frame according to claim 1, wherein the connecting column (53) is slidably mounted on the positioning platform (1) through the base (51), and a third positioning pin (55) is arranged on the connecting column (53) in a penetrating manner and used for positioning the side wall of the fork frame (71); The supporting part comprises a supporting plate (541) vertically arranged on the side wall of the connecting column (53) and a supporting column (542) fixedly arranged on the supporting plate (541), and/or, The supporting piece (56) is of a U-shaped structure, two opening ends of the supporting piece are respectively connected with supporting blocks (57) which are contacted with the fork frame (71), the supporting blocks (57) comprise supporting blocks (574) fixedly arranged on the supporting piece (56) and positioning blocks (573) fixedly arranged on the supporting blocks (574), and one side of each positioning block (573) is rotatably connected with a turnover block (571).
10. The flexible positioning device for the pallet truck fork frame according to claim 1, wherein the abutting piece (56) is fixed on the connecting column (53) through an abutting fixing plate (561), a telescopic component (52) is fixedly arranged on the rear side wall of the abutting fixing plate (561), and the telescopic component (52) is connected with the second quick clamping device (59) to enable the second quick clamping device (59) to move in a telescopic mode.
11. The flexible positioning device of pallet truck fork frame according to claim 10, wherein the telescopic assembly (52) comprises a telescopic fixed block (521) and a telescopic moving block (524) movably arranged inside the telescopic fixed block, the outer end of the telescopic moving block (524) is connected with the quick clamping device II (59) through a fixed connecting plate (58), and/or, Quick clamp device two (59) include fixed station (591), spanner (592), arm lock (594), be connected with articulated slab (593) between spanner (592) and arm lock (594), spanner (592), the bottom of arm lock (594) all are connected with fixed station (591) through pivot (596), the top of arm lock (594) has set firmly butt pole (595).
12. The flexible positioning device for the pallet truck fork frame according to claim 1, further comprising an oil cylinder support positioning mechanism (2) for positioning the oil cylinder support (73), wherein the oil cylinder support positioning mechanism (2) comprises a support seat (21) slidably mounted on the positioning platform (1), a positioning shaft and a first quick clamping device (23) are mounted on a mounting platform (22) at the top end of the support seat (21), a shaft hole on the oil cylinder support (73) penetrates through the positioning shaft, and the first quick clamping device (23) works to enable a supporting rod (595) of the quick clamping device to be in butt joint with the positioning shaft so as to position the oil cylinder support (73).

Description

Flexible positioning device for pallet truck fork frame Technical Field The invention belongs to a fork frame assembling device, and particularly relates to a flexible positioning device of a fork frame of a pallet truck. Background Pallet trucks, also known as pallet trucks, are one of the most common material handling equipment in the warehouse logistics field. The main working mode is that two front forks are inserted into slots of the tray, and the goods are lifted by the hydraulic system, so that short-distance carrying and loading and unloading operations are realized. The pallet truck has the characteristics of simple and convenient operation, compact structure, strong bearing capacity and the like, and is widely applied to places such as production workshops, warehouses, distribution centers and the like. The pallet truck fork frame includes a fork 71 and a fork 72 (as shown in fig. 1), and when assembling, the fork 71 needs to be assembled first, then the fork 71 and the fork 72 are assembled, and then the whole pallet truck fork frame is assembled with the truck frame. In order to adapt to different working scenes and working objects, the specification of the pallet truck is different, so that the width of the fork frame is different, and the length and the opening of the fork are also different. Therefore, when the welding fixture is assembled, different welding tools are required to be selected. For nonstandard products with special fork length and fork frame size, the welding tool needs to be frequently replaced due to the lack of a universal flexible tool. Or manually scribing the plate or the section bar, and determining the welding position and the assembly size of each part. The production efficiency is low, the labor intensity is high, and the time and the labor are consumed for changing the special die when the non-standard frame is produced every time. The mode of relying on manual scribing is long in preparation time, and high in skill requirement on operators, so that the production rate and the product quality are severely restricted. And machining accuracy is difficult to guarantee, errors of manual scribing and simple tool positioning are usually in millimeter level, and great challenges are brought to accurate assembly of a subsequent hydraulic system, a driving wheel set and a steering mechanism. The oversized deviation can cause difficult assembly, clamping stagnation of moving parts, uneven wear of tires and even influence the bearing capacity and service life of the whole vehicle. Therefore, how to optimize the assembly fixture of the fork frame and the fork of the pallet truck so as to reduce the manual dependency, improve the welding quality and the dimensional accuracy and improve the production efficiency is a technical problem to be solved in the field. Disclosure of Invention The invention provides a flexible positioning device of a pallet truck fork frame, which is used for positioning and assembling a fork and a fork frame on the fork frame. The technical scheme of the invention is as follows: the flexible positioning device of the pallet truck fork frame comprises a positioning platform, wherein a fork root positioning mechanism and a fork tip positioning mechanism are sequentially arranged on the top end surface of the positioning platform in a sliding manner along the length direction; The fork root positioning mechanism and the fork tip positioning mechanism both comprise two relatively sliding moving assemblies, each moving assembly comprises a driving device and an outer stop block which are oppositely arranged, and a containing groove for placing a fork is formed between the driving device and the outer stop block; the fork root positioning mechanism further comprises a pressing plate assembly which is arranged above the two moving assemblies in a supporting way, and a connecting shaft which is used for penetrating through a fork point shaft hole on the fork to be fixed; The fork frame positioning mechanism comprises a connecting column, and a supporting part for supporting the bottom end of the fork frame and a pressing piece for pressing the end part of the fork frame are arranged on the connecting column. The fork root positioning mechanism and the fork tip positioning mechanism are respectively arranged on the positioning platform in a sliding way, so that the positioning requirements of the forks with different lengths can be met. In addition, two forks on a pallet truck can simultaneously carry out positioning welding operation, namely, the two forks are respectively placed on two moving assemblies which move relatively, the size of a fork shift can be adjusted, and the pallet truck can meet the requirements of pallet trucks with different sizes. And both sides of the fork are respectively limited by the driving device and the outer baffle block, and the upper part of the fork root is limited by the pressing plate component, so that the fork is prevented fr