A telescopic main arm

Abstract

This utility model relates to the field of telescopic boom technology and discloses a telescopic main boom, including a hollow support arm. An installation groove is formed on the left side of the hollow support arm, and a hydraulic cylinder is installed at the right end of the hollow support arm. Support blocks are sleeved on both ends of the hydraulic cylinder. A telescopic boom is connected to the left end of the hydraulic cylinder, and an installation block is connected to the left end of the telescopic boom. A ball bearing retainer is installed in the installation groove of the hollow support arm, and several balls are embedded in the inner wall of the ball bearing retainer. A self-lubricating coating is sprayed onto the inner wall of the hollow support arm and the outer wall of the telescopic boom. This utility model, by spraying a self-lubricating coating onto the inner wall of the hollow support arm and the outer wall of the telescopic boom, and by setting up a ball bearing retainer and several balls, utilizes their mutual cooperation to greatly reduce the coefficient of friction during the telescopic boom's extension and retraction, thereby extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of telescopic arm technology, specifically a telescopic main arm. Background Technology

[0002] Window cleaning machines are permanent suspended access devices used for cleaning and maintenance of windows and exterior walls of buildings or structures. They are classified by installation method as: wheel-mounted, roof-mounted track, suspended track, pole-mounted, and slide-type. The telescopic boom is an important component of the window cleaning machine.

[0003] Existing telescopic booms suffer from high friction coefficients during extension and retraction, which shortens their service life. Therefore, there is an urgent need for a new type of telescopic boom to solve these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a telescopic boom to solve the problem mentioned in the background art, where the existing telescopic boom has a high coefficient of friction during extension and retraction, which leads to a shortened service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A telescopic boom includes a hollow support arm. An installation groove is provided on the left side of the hollow support arm. A hydraulic cylinder is installed at the right end of the hollow support arm. Support blocks are sleeved on both ends of the hydraulic cylinder. A telescopic arm is connected to the left end of the hydraulic cylinder. An installation block is connected to the left end of the telescopic arm. A ball bearing retainer is installed in the installation groove of the hollow support arm. Several balls are embedded in the inner wall of the ball bearing retainer. A self-lubricating coating is sprayed on the inner wall of the hollow support arm and the outer wall of the telescopic arm. The left end of the telescopic arm passes through the middle of the ball bearing retainer and the left end of the hollow support arm from right to left and extends outward.

[0007] As a preferred embodiment of this utility model, mounting holes are provided at all four corners of the mounting block.

[0008] As a preferred embodiment of this invention, the self-lubricating coating is a polytetrafluoroethylene coating.

[0009] As a preferred embodiment of this utility model, the four sides of the support block are connected to the four sides of the inner side of the hollow support arm.

[0010] As a preferred embodiment of this utility model, the telescopic arm is in contact with the inner periphery of the ball retainer.

[0011] As a preferred embodiment of this utility model, the ball retainer is in the shape of a rectangular ring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention utilizes a self-lubricating coating applied to the inner wall of the hollow support arm and the outer wall of the telescopic arm, along with a ball retainer and several balls. By leveraging the interaction between these components, the friction coefficient of the telescopic arm during extension and retraction can be significantly reduced, thereby extending its service life. Attached Figure Description

[0014] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0017] Figure 3 This is a side sectional view of the connection between the ball cage and the balls of this utility model.

[0018] Figure 4 This is a cross-sectional structural diagram showing the positional relationship between the telescopic arm and the self-lubricating coating of this utility model;

[0019] Figure 5 This is a schematic diagram of the internal structure of the hollow support arm of this utility model.

[0020] In the diagram: 1. Hollow support arm; 2. Telescopic arm; 3. Mounting block; 4. Mounting hole; 5. Ball retainer; 6. Ball; 7. Mounting groove; 8. Hydraulic cylinder; 9. Support block; 10. Self-lubricating coating. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0022] Please see Figure 1-5A telescopic boom includes a hollow support arm 1. An installation groove 7 is provided on the left side of the hollow support arm 1. A hydraulic cylinder 8 is installed at the right end of the hollow support arm 1. Support blocks 9 are sleeved on both ends of the hydraulic cylinder 8. A telescopic arm 2 is connected to the left end of the hydraulic cylinder 8. An installation block 3 is connected to the left end of the telescopic arm 2. A ball retainer 5 is installed in the installation groove 7 of the hollow support arm 1. Several balls 6 are embedded in the inner wall of the ball retainer 5. A self-lubricating coating 10 is sprayed on the inner wall of the hollow support arm 1 and the outer wall of the telescopic arm 2. The left end of the telescopic arm 2 passes through the middle of the ball retainer 5 and the left end of the hollow support arm 1 from right to left and extends outward. By spraying the self-lubricating coating 10 on the inner wall of the hollow support arm 1 and the outer wall of the telescopic arm 2, and by setting the ball retainer 5 and several balls 6, the friction coefficient of the telescopic arm 2 during extension and retraction can be greatly reduced, thereby extending its service life.

[0023] Mounting holes 4 are provided at all four corners of the mounting block 3.

[0024] The self-lubricating coating 10 is a polytetrafluoroethylene coating.

[0025] The four sides of the support block 9 are connected to the four sides of the inner side of the hollow support arm 1.

[0026] The telescopic arm 2 is in contact with the inner periphery of the ball bearing retainer 5 and the ball bearings 6.

[0027] The ball cage 5 is rectangular in shape.

[0028] The working principle and usage process of this utility model are as follows: First, when working, the hydraulic cylinder 8 is activated to drive the telescopic arm 2 to move to the left. Since the telescopic arm 2 is in contact with the inner periphery of the ball bearing retainer 5, the ball bearings 6 rotate as the telescopic arm 2 moves. The rotating ball bearings 6 can reduce the coefficient of friction when the telescopic arm 2 moves. At the same time, a self-lubricating coating 10 is sprayed on the inner wall of the hollow support arm 1 and the outer wall of the telescopic arm 2. The self-lubricating coating 10 is a polytetrafluoroethylene coating. The polytetrafluoroethylene coating can further reduce the coefficient of friction when the telescopic arm 2 moves, thereby extending its service life. The contents not described in detail in this description belong to the prior art known to those skilled in the art.

[0029] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A telescopic main boom, comprising a hollow support arm (1), characterized in that: The hollow support arm (1) has an installation groove (7) on the left side inside. A hydraulic cylinder (8) is installed on the right end inside the hollow support arm (1). Support blocks (9) are sleeved on both the left and right ends of the hydraulic cylinder (8). A telescopic arm (2) is connected to the left end of the hydraulic cylinder (8). An installation block (3) is connected to the left end of the telescopic arm (2). A ball retainer (5) is installed in the installation groove (7) of the hollow support arm (1). Several balls (6) are embedded on the inner side wall of the ball retainer (5). A self-lubricating coating (10) is sprayed on the inner side wall of the hollow support arm (1) and the outer side wall of the telescopic arm (2). The left end of the telescopic arm (2) passes through the middle of the ball retainer (5) and the left end of the hollow support arm (1) from right to left and extends outward.

2. The telescopic boom according to claim 1, characterized in that: Mounting holes (4) are provided at all four corners of the mounting block (3).

3. The telescopic boom according to claim 1, characterized in that: The self-lubricating coating (10) is a polytetrafluoroethylene coating.

4. The telescopic boom according to claim 1, characterized in that: The four sides of the support block (9) are connected to the four sides of the inner side of the hollow support arm (1).

5. A telescopic boom according to claim 1, characterized in that: The telescopic arm (2) is in contact with the inner periphery of the ball retainer (5) and the balls (6).

6. A telescopic boom according to claim 1, characterized in that: The ball retainer (5) is rectangular in shape.

Images