CN-224210181-U - Work piece positioning mechanism for concrete trowelling

Abstract

The utility model relates to the technical field of workpiece positioning, and discloses a workpiece positioning mechanism for concrete trowelling, which comprises a bottom plate and an air pump, wherein a partition plate is fixedly arranged in the middle of the upper end of the bottom plate, two first air cylinders are symmetrically and fixedly arranged on two sides of the partition plate on the bottom plate, two guide rails are fixedly arranged on the bottom plate, two movable seats are slidably arranged between the two guide rails and are positioned on two sides of the partition plate, the two movable seats are fixedly connected with piston rod ends of the two first air cylinders respectively, second air cylinders are fixedly arranged on the two movable seats, the first air cylinders and the second air cylinders are matched with the air pump for use, positioning pins penetrate through the movable seats, and linear bearings are arranged on the outer sides of the positioning pins in the movable seats. The positioning pin of the positioning mechanism cannot accurately and rapidly correspond to the datum point of the workpiece when the workpiece for manufacturing the concrete segment is positioned at present, so that the workpiece is clamped.

Inventors

• LIU XIAOQING
• SUN CHUANSHAO
• WANG JIUCHENG
• CHEN JIAXIN
• LI LI
• WANG RUIHAO

Assignees

• 济南轨道中铁管片制造有限公司

Dates

Publication Date

20260508

Application Date

20250401

Claims (6)

1. 1. The workpiece positioning mechanism for trowelling concrete comprises a bottom plate (1) and an air pump, and is characterized in that a partition plate (2) is fixedly arranged in the middle of the upper end of the bottom plate (1), two first air cylinders (3) are symmetrically and fixedly arranged on two sides of the partition plate (2) on the bottom plate (1), two guide rails (4) are fixedly arranged on the bottom plate (1), two movable seats (41) are slidably arranged between the two guide rails (4), the two movable seats (41) are positioned on two sides of the partition plate (2), the two movable seats (41) are fixedly connected with piston rod ends of the two first air cylinders (3) respectively, a second air cylinder (5) is fixedly arranged on the two movable seats (41), the first air cylinders (3) and the second air cylinders (5) are matched with the air pump, positioning pins (51) are fixedly arranged at the piston rod ends of the second air cylinders (5), the positioning pins (51) penetrate through the movable seats (41), and linear bearings are arranged on the outer sides of the positioning pins (51) in the movable seats (41).
2. 2. The workpiece positioning mechanism for trowelling concrete according to claim 1, wherein the guide rail (4) is I-shaped, a sliding clamping block (42) is fixedly arranged at the lower end of the movable seat (41), a groove matched with the guide rail (4) is formed at the lower end of the sliding clamping block (42), and the movable seat (41) is in sliding clamping connection with the guide rail (4) through the sliding clamping block (42).
3. 3. The workpiece positioning mechanism for trowelling concrete according to claim 2, wherein the groove wall of the sliding clamping block (42) is provided with a mounting groove (421), a movable plate (422) is movably mounted in the mounting groove (421), one side of the movable plate (422) close to the guide rail (4) is provided with an anti-slip rubber layer, two extension springs (423) and a telescopic air cylinder (424) are fixedly mounted between the movable plate (422) and the groove wall of the mounting groove (421), an air pipe (425) is fixedly inserted on the telescopic air cylinder (424), and the end part of the air pipe (425) penetrates through the sliding clamping block (42) to be connected with the output end of the air pump.
4. 4. The workpiece positioning mechanism for trowelling concrete according to claim 3, wherein the movable plate (422) is fixedly provided with two limiting columns (426), the sliding clamping block (42) is provided with limiting grooves (427) matched with the two limiting columns (426), and the limiting grooves (427) are communicated with the mounting grooves (421).
5. 5. The workpiece positioning mechanism for trowelling concrete according to claim 1, wherein a front fixing plate (6), a rear fixing plate (61) and two side plates (62) are fixedly arranged on the bottom plate (1), a fixing cover (63) is covered on the bottom plate (1), the fixing cover (63) is connected with the front fixing plate (6), the rear fixing plate (61) and the two side plates (62) through bolts in a threaded mode, two waist-shaped openings (631) are formed in the fixing cover (63), and a piston rod of the second cylinder (5) penetrates through the waist-shaped openings (631).
6. 6. The work piece positioning mechanism for trowelling of concrete according to claim 1, wherein one end of the positioning pin (51) far away from the movable seat (41) is subjected to chamfering treatment, and an anti-slip layer is arranged on the surface of the positioning pin (51).

Description

Work piece positioning mechanism for concrete trowelling Technical Field The utility model belongs to the technical field of workpiece positioning, and particularly relates to a workpiece positioning mechanism for concrete trowelling. Background Concrete segments (also known as precast concrete segments) are support structures used in tunnel construction and are generally used widely in shield construction. The annular members are prefabricated by reinforced concrete to form an integral structure of the tunnel lining, and can bear the pressure of soil and other external loads. In the process of manufacturing the concrete segment, the positioning of the workpiece is a key step for ensuring the segment size precision, shape consistency and overall quality. Whether the workpiece is positioned accurately or not directly relates to whether the concrete segments can be assembled smoothly or not and keeps good structural performance in the use process. At present, when a workpiece for manufacturing a concrete segment is positioned, a positioning pin of a positioning mechanism cannot accurately and rapidly correspond to a datum point of the workpiece, so that the workpiece is clamped. Therefore, we propose a work positioning mechanism for concrete trowelling to solve the above-mentioned problems. Disclosure of utility model The utility model aims to solve the problem that a locating pin of a locating mechanism cannot accurately and rapidly correspond to a datum point of a workpiece when the workpiece for manufacturing the concrete segment is located at present, so that the workpiece is clamped. In order to achieve the technical purpose, the utility model adopts the following technical scheme: The utility model provides a work piece positioning mechanism for concrete trowelling, includes bottom plate and air pump, the upper end middle part fixed mounting of bottom plate has the baffle, be located baffle both sides symmetry fixed mounting on the bottom plate and have two first cylinders, fixed mounting has two guide rails on the bottom plate, slidable mounting has two movable seats between two guide rails, and two movable seats are located the both sides of baffle, and two movable seats respectively with the piston rod end fixed connection of two first cylinders, equal fixed mounting has the second cylinder on two movable seats, and first cylinder and second cylinder all use with the air pump cooperation, the piston rod fixed mounting of second cylinder has the locating pin, the locating pin runs through the movable seat, be located the outside of locating pin in the movable seat and be provided with linear bearing. Further limited, the guide rail is I-shaped, the lower extreme fixed mounting of movable seat has the slip fixture block, and the slip fixture block lower extreme is equipped with the recess with guide rail looks adaptation, the movable seat passes through slip fixture block slip joint on the guide rail. The structure design is simple in structure and convenient to use. Further limited, the mounting groove has been seted up on the recess cell wall of slip fixture block, movable mounting has the fly leaf in the mounting groove, one side that the fly leaf is close to the guide rail is equipped with anti-skidding rubber layer, fixed mounting has two extension springs and flexible inflator between fly leaf and the mounting groove cell wall, fixed grafting has the gas-supply pipe on the flexible inflator, the tip of gas-supply pipe runs through the slip fixture block and meets with the air pump output. By means of the structural design, when the telescopic inflator stretches, the movable plate can be pushed to be tightly attached to the guide rail, the transverse friction force between the sliding clamping block and the guide rail can be increased, the pressure born by the first cylinder part is reduced, and the service life of the first cylinder is prolonged. Further limiting, two limiting columns are fixedly mounted on the movable plate, limiting grooves matched with the two limiting columns are formed in the sliding clamping blocks, and the limiting grooves are communicated with the mounting grooves. With the structural design, the two limiting posts are movably inserted into the limiting groove, and can limit the movable plate. Further limited, fixed mounting has preceding fixed plate, back fixed plate and two curb plates on the bottom plate, the bottom plate upper cover is equipped with fixed cover, fixed cover passes through screw thread connection on bolt and the preceding fixed plate, back fixed plate and the two curb plates, two waist shape mouths have been seted up on the fixed cover, and the piston rod of second cylinder passes waist shape mouth. With the structural design, the fixed cover is covered on the bottom plate, and has a protection effect on each structure on the bottom plate. Further limited, the one end that the locating pin was kept away from the movable seat is done chamfer and is hand