CN-224212360-U - Arm support telescopic length detection device, arm support and forklift

CN224212360UCN 224212360 UCN224212360 UCN 224212360UCN-224212360-U

Abstract

The application discloses a boom telescopic length detection device, a boom and a forklift truck, wherein the boom telescopic length detection device is used for being arranged on the boom to detect the telescopic length of the boom, the boom comprises a basic arm and a telescopic arm which can be telescopic relative to the basic arm, the boom telescopic length detection device comprises a stay wire sensor, the stay wire sensor is fixed on the basic arm, and stay wires in the stay wire sensor bypass at least one wire passing wheel to be fixed on the telescopic arm. According to the arm support telescopic length detection device, the arm support and the forklift truck, the stay wires in the stay wire sensors bypass at least one wire passing wheel from the stay wire sensors fixed on the basic arm and are fixed on the telescopic arm, and the stay wire sensors can be arranged at any position of the basic arm through the steering of the wire passing wheel, so that the installation adaptability is high, collision damage can be avoided, and the service life and the detection reliability of the detection device can be improved.

Inventors

LIU GUOLIANG
LI YUAN
ZOU XIANWEI
LIU XIAOJUN
YANG ZHOU
YU XIN

Assignees

湖南星邦智能装备股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250522

Claims (10)

1. The telescopic length detection device of the arm support is used for being arranged on the arm support to detect the telescopic length of the arm support, and the arm support comprises a basic arm and a telescopic arm which can stretch and retract relative to the basic arm.
2. The boom extension length detection device according to claim 1, further comprising a wire passing wheel mounting plate, wherein the wire passing wheel mounting plate is fixed on the basic arm, the boom extension length detection device comprises a first wire passing wheel and a second wire passing wheel, the first wire passing wheel and the second wire passing wheel are rotatably mounted on the wire passing wheel mounting plate, and the wire is wound from the upper surface of the first wire passing wheel to the lower surface of the second wire passing wheel and then fixed on the extension arm.
3. The boom extension length detection device according to claim 2, further comprising a rotating shaft and an elastic member, wherein the rotating shaft is fixed on the base arm, the wire passing wheel mounting plate is pivoted on the rotating shaft, two ends of the elastic member are respectively connected with the wire passing wheel mounting plate and the base arm, the wire is pulled out when the extension arm extends forwards relative to the base arm, and the elastic member is stretched when the wire passing wheel mounting plate is driven to rotate, so that a pulling force is generated on the wire passing wheel mounting plate, and a pretightening force is provided for the wire.
4. The boom extension length detection device according to claim 3, further comprising a contact sensor fixed on the base arm and having a predetermined detection distance from the spool mounting plate, such that when the length sensor fails and the wire cannot retract in time, the elastic member pulls the spool mounting plate to rotate to the contact sensor and trigger an alarm.
5. A boom extension length detection apparatus as claimed in claim 3 wherein the resilient member is a spring and is secured to the base arm by a spring securing member.
6. The boom extension length detection device according to claim 1, wherein the wire sensor is fixed to the upper surface of the base arm through a mounting base.
7. The boom extension length detection device of claim 6, wherein the pull wire sensor is located in a boom hinge point cavity.
8. The boom extension length detection device according to claim 1, wherein the stay wire is fixed to the extension arm by a fixing screw.
9. Arm support, characterized by comprising a basic arm, a telescopic arm and an arm support telescopic length detection device according to any of claims 1 to 8.
10. A forklift truck comprising the boom of claim 9.

Description

Arm support telescopic length detection device, arm support and forklift Technical Field The application relates to the technical field of mechanical equipment, in particular to a boom telescopic length detection device, a boom and a forklift. Background The forklift is used as a loading transport tool, safety is very important, and particularly, control of the telescopic length is very important when the forklift stretches with different loads, so that the stability of the whole forklift is affected. The stay wire sensor of the forklift in the current market is arranged on the outer side surface of the arm support and runs linearly. The device has the potential safety hazard that firstly, the pull wire sensor is arranged on the outer side surface of the arm frame and is easy to collide and damage when goods are loaded, and secondly, the single-side broken wire detection failure problem is that the pull wire sensor can generate rope skipping phenomenon due to the shaking of the arm frame when the arm frame stretches quickly, so that the pull wire cannot retract smoothly, the detection result is inaccurate, the pull wire sensor is damaged and the like. Disclosure of utility model In order to solve the technical problems, the utility model aims to provide a boom extension length detection device capable of improving detection reliability, a boom and a forklift. The technical scheme provided by the utility model is as follows: the telescopic length detection device comprises a stay wire sensor, wherein the stay wire sensor is fixed on the basic arm, and stay wires in the stay wire sensor bypass at least one wire passing wheel and are fixed on the telescopic arm. Preferably, the telescopic length detection device for the arm support comprises a first wire passing wheel and a second wire passing wheel, the first wire passing wheel and the second wire passing wheel are rotatably arranged on the wire passing wheel mounting plate, and the stay wire is wound from the upper surface of the first wire passing wheel to the lower surface of the second wire passing wheel and then fixed on the telescopic arm. Preferably, the wire winding device further comprises a rotating shaft and an elastic piece, wherein the rotating shaft is fixed on the basic arm, the wire winding wheel mounting plate is pivoted on the rotating shaft, two ends of the elastic piece are respectively connected with the wire winding wheel mounting plate and the basic arm, when the telescopic arm stretches forwards relative to the basic arm, the wire winding wheel is pulled out, and when the wire winding wheel mounting plate is driven to rotate, the elastic piece is stretched to generate a pulling force on the wire winding wheel mounting plate, so that a pretightening force is provided for the wire winding. Preferably, the device further comprises a contact type sensor, wherein the contact type sensor is fixed on the basic arm and has a preset detection distance with the wire passing wheel mounting plate, so that when the length sensor fails and the stay wire cannot retract in time, the elastic piece pulls the wire passing wheel mounting plate to rotate to abut against the contact type sensor and trigger an alarm. Preferably, the elastic member is a spring, and is fixed to the base arm by a spring fixing member. Preferably, the stay wire sensor is located in the arm support hinge point cavity. Preferably, the pull wire sensor is fixed on the upper surface of the basic arm through a mounting seat. Preferably, the stay wire is fixed on the telescopic arm through a fixing screw. The arm support comprises a basic arm, a telescopic arm and the arm support telescopic length detection device. A forklift truck comprises the arm support. Compared with the prior art, the telescopic length detection device for the arm support, the arm support and the forklift truck have the advantages that the stay wire in the stay wire sensor bypasses at least one wire passing wheel from the stay wire sensor fixed on the basic arm and is fixed on the telescopic arm, the stay wire sensor can be arranged at any position of the basic arm through the steering of the wire passing wheel, the installation adaptability is high, collision damage can be avoided, and accordingly the service life and the detection reliability of the detection device can be improved. And through setting up first line wheel, second line wheel, line wheel mounting panel, rotation axis, elastic component etc. will act as go-between when flexible arm is stretched forward for the basic arm, when driving line wheel mounting panel rotation, the elastic component is stretched, produces pulling force to line wheel mounting panel, and then provides the pretightning force for acting as go-between, can prevent effectively that the cantilever crane shake from producing the risk of rope skipping, has further improved detection reliability. Drawings In order to more clearly illustrate the embodiments of the present applicatio