A kind of anti-scratch locking structure for electric drive cart

Abstract

The utility model relates to an electric drive cart scratchproof locking structure relates to electric drive cart technical field, including the clamp with locking slit I, first spring positioning pin mounting hole, still include the anti -scratch shaft sleeve of plug -in installation in the inside of clamp, the hole wall of anti -scratch shaft sleeve is equipped with the second spring positioning pin mounting hole with first spring positioning pin mounting hole, the locking slit III of axial extension, the one end surface of clamp is equipped with a plurality of anti -scratch shaft sleeve mounting hole, the one end of anti -scratch shaft sleeve is equipped with the annular boss of outwardly folding, the annular boss is equipped with the circumference distribution a plurality of mounting holes, the mounting hole with anti -scratch shaft sleeve mounting hole corresponds and adopts screw joint, anti -scratch shaft sleeve adopts the plastic material, the utility model discloses the anti -scratch shaft sleeve of plug -in installation in the inside of clamp, effectively solved the problem that the telescopic pipe and the clamp direct contact easily scratch the front and rear telescopic rod paint surface in the telescopic pipe and is folded and is unfolded process.

Description

Technical Field

[0001] This utility model belongs to the field of electric drive trolley technology, specifically relating to a scratch-resistant locking structure for electric drive trolleys. Background Technology

[0002] Currently, the telescopic tubes on electric trolleys are accurately and quickly positioned during deployment and retraction using a spring-positioning pin structure, and locked in place by a clamp design. For example, Chinese utility model patent application number 202323465821.6, authorized on July 19, 2024, discloses a quick-release locking structure and an electric trolley using this locking structure, specifically including a handle assembly, clamp, main tube assembly, frame assembly, spring-positioning pin, and quick-release screw; the handle assembly includes a telescopic tube, handle, anti-derailment groove, etc. The structure includes folding mounting holes and unfolding mounting holes; the clamp includes stepped holes, threaded holes, locking slot I, locking boss, spring positioning pin mounting holes, and quick-press screw mounting holes; the main pipe assembly includes the main pipe, anti-detachment positioning holes, U-shaped blocks, locking slot II, and round holes; the aforementioned structure enables accurate and rapid positioning of the telescopic tube during unfolding and retraction; however, in the aforementioned structure, the telescopic rod and the clamp are in direct contact during the unfolding and retraction of the telescopic tube, which can easily scratch the paint surface of the front and rear telescopic rods, causing them to lose paint film protection, resulting in poor corrosion resistance of the front and rear telescopic tubes and affecting their service life. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this utility model is to propose a scratch-resistant locking structure for an electric drive trolley.

[0004] The purpose of this utility model is achieved through the following technical solution. A scratch-resistant locking structure for an electric drive trolley, according to this utility model, includes a clamp with a locking slot I and a first spring positioning pin mounting hole; it also includes a scratch-resistant bushing inserted inside the clamp, the bushing having a second spring positioning pin mounting hole corresponding to the first spring positioning pin mounting hole on its bore wall, and a locking slot III extending axially; one end of the scratch-resistant bushing has an outwardly folded annular boss, the annular boss having several circumferentially distributed mounting holes, one end of the clamp having several scratch-resistant bushing mounting holes, the mounting holes corresponding to the scratch-resistant bushing mounting holes and connected by screws; the scratch-resistant bushing is made of plastic material.

[0005] Furthermore, locking seam Ⅲ corresponds to locking seam Ⅰ.

[0006] Furthermore, the scratch-resistant bushing is made of nylon.

[0007] Based on the aforementioned technical solution, this utility model has the following beneficial effects: by setting a plastic anti-scratch bushing (i.e., inserting an anti-scratch bushing inside the clamp) between the telescopic tube and the clamp, it is ensured that the telescopic tube avoids direct contact with the clamp during the extension and retraction process, effectively solving the problem that the paint surface of the front and rear telescopic tubes is easily scratched during the extension and retraction process, and the loss of paint film protection makes the corrosion resistance of the front and rear telescopic tubes worse, affecting the service life.

[0008] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an electric trolley using a scratch-resistant locking structure according to this utility model.

[0010] Figure 2 This is an exploded view of an anti-scratch locking structure for an electric drive trolley according to this utility model.

[0011] Figure 3 This is a schematic diagram of the clamp structure in an anti-scratch locking structure for an electric drive trolley according to this utility model.

[0012] Figure 4 This is a schematic diagram of the anti-scratch bushing in an anti-scratch locking structure for an electric drive trolley according to this utility model.

[0013] Reference numerals: 1. Handlebar assembly; 2. Clamp; 201. Anti-scratch bushing mounting hole; 202. Stepped hole; 203. Threaded hole; 204. Locking slot I; 205. Locking boss; 206. First spring locating pin mounting hole; 207. Quick-release screw mounting hole; 3. Main tube assembly; 4. Frame assembly; 5. Anti-scratch bushing; 50. Annular boss; 501. Mounting hole; 502. Through hole; 503. Locking slot III; 504. Second spring locating pin mounting hole; 6. Spring locating pin; 7. Quick-release screw. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Please see Figure 1The existing electric drive trolley structure includes a handle assembly 1, a clamp 2, a main tube assembly 3, a frame assembly 4, a spring positioning pin 6, and a positioning screw 7. The handle assembly 1 includes a telescopic tube, and the clamp 2 includes a stepped hole 202, a threaded hole 203, a locking slot I 204, a locking boss 205, a first spring positioning pin mounting hole 206, and a quick-press screw mounting hole 207. The functions of the aforementioned components and the connection relationships between the components are existing technologies and will not be repeated here.

[0015] Based on the existing structure described above, please refer to Figures 2 to 4 In this embodiment, an anti-scratch bushing 5 is inserted inside the clamp 2. The anti-scratch bushing 5 is an axially hollow component with a through hole 502 for the telescopic tube to pass through. One end of the anti-scratch bushing has an outwardly folded annular boss 50, and the annular boss 50 has several circumferentially distributed mounting holes 501. One end of the clamp 2 has several anti-scratch bushing mounting holes 201. When the other end of the anti-scratch bushing is inserted into the clamp (without being fixed by screws), the annular boss acts as a stop structure to limit the insertion depth of the anti-scratch bushing. When the mounting holes 501 on it correspond to the anti-scratch bushing mounting holes 201 on the clamp, they are connected by screws. The hole wall of the anti-scratch bushing is provided with The device has a second spring positioning pin mounting hole 504 and an axially extending locking slot Ⅲ 503. When the anti-scratch bushing is inserted into the clamp by screws, the second spring positioning pin mounting hole 504 corresponds to the first spring positioning pin mounting hole 206, and the locking slot Ⅲ corresponds to the locking slot Ⅰ. In other embodiments of this utility model, the locking slot Ⅲ and the locking slot Ⅰ may not correspond. The anti-scratch bushing 5 is made of nylon material. During the rapid positioning process of the telescopic tube unfolding and retracting, it avoids direct contact between the telescopic tube and the clamp, and can effectively protect the paint film of the telescopic tube from being scratched. Of course, in other embodiments of this utility model, the anti-scratch bushing may be made of other types of plastic materials.

[0016] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the design and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A scratch-resistant locking structure for an electric trolley, comprising a clamp (2) having a locking slot I (204) and a first spring positioning pin mounting hole (206); characterized in that: It also includes a scratch-resistant bushing (5) inserted inside the clamp. The hole wall of the scratch-resistant bushing is provided with a second spring positioning pin mounting hole (504) corresponding to the first spring positioning pin mounting hole (206) and a locking slot III (503) extending along the axial direction. One end of the scratch-resistant bushing is provided with an outwardly folded annular boss (50). The annular boss is provided with a number of circumferentially distributed mounting holes (501). One end of the clamp is provided with a number of scratch-resistant bushing mounting holes (201). The mounting holes correspond to the scratch-resistant bushing mounting holes and are connected by screws. The scratch-resistant bushing is made of plastic material.

2. The anti-scratch locking structure for an electric drive trolley according to claim 1, characterized in that: Locking seam III corresponds to locking seam I.

3. The anti-scratch locking structure for an electric drive trolley according to claim 1, characterized in that: The scratch-resistant bushing is made of nylon.

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