Roller-type telescoping lift arm and vehicle lift

Abstract

The utility model discloses a purpose is in revealing a kind of roller type telescopic lifting arm and vehicle lifting machine, it is related to vehicle maintenance technical field, including lifting arm and telescopic arm of mobile ground along the inner wall of the lifting arm moves;The bottom wall of the lifting arm is provided with pressure contraction wheel;Obliquely pull the end of the telescopic arm, the pressure contraction wheel pops up and protrudes from the bottom wall;When the telescopic arm is in no load or has load, the top of the pressure contraction wheel is flush with the bottom wall, technical effect: the bottom wall of lifting arm is provided with pressure contraction wheel, the main friction between telescopic arm and lifting arm is changed into rolling friction, and the friction that telescopic arm is received when moving is greatly reduced;When needing to pull telescopic arm, obliquely pull the end (tray) of the telescopic arm, the pressure contraction wheel pops up and protrudes from the bottom wall, and telescopic arm will move under the rolling assistance of pressure contraction wheel, improve the convenience that operator pulls telescopic arm.

Description

Technical Field

[0001] This utility model relates to the field of vehicle maintenance technology, and in particular to a roller-type telescopic lifting arm and a vehicle lift. Background Technology

[0002] As an indispensable core piece of equipment in modern automotive repair and maintenance workshops, the column lift's main function is to safely and smoothly raise vehicles to a suitable working height using a sturdy lifting arm. To accommodate the diverse range of vehicle models with varying wheelbases, modern lifts generally employ a telescopic lifting arm design. This design typically consists of a support arm and a retractable telescopic arm. By adjusting the extension length of the telescopic arm, maintenance personnel can flexibly and precisely position the pallet (or lifting pad) to the optimal lifting support point for different vehicle models (such as the reinforcing rib at the bottom of the door), greatly improving the equipment's versatility and ease of operation. However, behind this significant advantage, a long-standing technical problem that directly impacts user experience and work efficiency is becoming increasingly prominent: during the extension and retraction adjustment of the telescopic arm, the contact interface between the telescopic arm and the support arm is usually a direct metal-to-metal contact friction, generating significant sliding friction. This makes length adjustment very strenuous for operators, especially after the equipment has been used for a period of time, as dust, oil, or micro-wear on the metal surface can exacerbate the frictional resistance. Designing a telescopic lifting arm that is easy to pull out is one of the technical problems that urgently needs to be solved.

[0003] In view of this, it is necessary to develop a roller-type telescopic lifting arm and vehicle lift to overcome the above-mentioned defects. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to disclose a roller-type telescopic lifting arm and a vehicle lift.

[0005] The first objective of this invention is to provide a roller-type telescopic lifting arm.

[0006] The second objective of this invention is to provide a vehicle lift.

[0007] To achieve the first objective mentioned above, this utility model provides a roller-type telescopic lifting arm, including a lifting arm and a telescopic arm that moves movably along the inner wall of the lifting arm. The bottom wall of the lifting arm is provided with a pressure retraction wheel; Pulling the end of the telescopic arm diagonally upward causes the pressure retraction wheel to spring up and protrude from the bottom wall; When the telescopic arm is unloaded or under load, the top of the pressure retraction wheel is flush with the bottom wall.

[0008] Preferably, the lifting arm is an articulated arm.

[0009] Preferably, the lifting arm includes a first arm and a second arm, and the first arm and the second arm are provided with movable joints.

[0010] Preferably, the top and bottom surfaces of the first arm are respectively provided with a first reinforcing plate and a second reinforcing plate.

[0011] Preferably, a fixed support plate is provided below the second reinforcing plate; A first housing and a second housing are installed above the support plate, and both the first housing and the second housing penetrate the second reinforcing plate and the lifting arm. Pressure contraction rollers are respectively installed in the first housing and the second housing.

[0012] Preferably, fasteners are provided at both ends of the first housing and the second housing, and the fasteners pass through the lifting arm and the second reinforcing plate and are locked to the support plate.

[0013] Preferably, the rotation center of the pressure contraction wheel is lower than the bottom wall.

[0014] Preferably, a tray is provided at the end of the telescopic arm.

[0015] Preferably, pads are provided on the top wall and side wall of the lifting arm.

[0016] Based on the same inventive principle, in order to achieve the second inventive objective mentioned above, this utility model provides a vehicle lift, including a plurality of lifting columns, wherein the lifting columns drive the roller-type telescopic lifting arm as described in the first invention to rise and fall.

[0017] Compared with the prior art, the technical effects of this utility model are as follows: This utility model relates to a telescopic arm movably mounted inside a lifting arm. A pressure retraction wheel is installed on the bottom wall of the lifting arm, changing the primary friction between the telescopic arm and the lifting arm to rolling friction, significantly reducing the friction experienced by the telescopic arm during movement. Specifically, when the telescopic arm needs to be pulled out, the end (tray) of the telescopic arm is pulled upwards at an angle. The pressure retraction wheel springs up and protrudes from the bottom wall, allowing the telescopic arm to move with the assistance of the rolling motion of the pressure retraction wheel, improving the ease of pulling out the telescopic arm for the operator. When the telescopic arm is unloaded or under load, the pressure retraction wheel compresses the spring, its top becoming flush with the bottom wall. Friction is restored between the inner walls of the telescopic arm and the lifting arm, maintaining relative stillness. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the roller-type telescopic lifting arm of this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the roller-type telescopic lifting arm of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the pressure contraction wheel of this utility model.

[0022] Figure 4 This is a bottom view schematic diagram of the roller-type telescopic lifting arm of this utility model.

[0023] Figure 5 This is a utility model Figure 4 Schematic diagram of section AA.

[0024] Figure 6 This is a utility model Figure 2 Schematic diagram of cross-section at BB.

[0025] Among them, 1. Lifting arm; 11. Bottom wall; 12. First arm; 121. First reinforcing plate; 122. Second reinforcing plate; 13. Second arm; 14. Movable joint; 15. Top wall; 16. Side wall; 17. Pad; 2. Telescopic arm; 21. Tray; 3. Pressure retraction wheel; 31. Support plate; 32. First housing; 33. Second housing; 34. Fastener. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention. Example 1

[0027] See Figures 1 to 6 As shown in the figure, this embodiment discloses a specific implementation of a roller-type telescopic lifting arm (hereinafter referred to as "lifting arm").

[0028] Roller-type telescopic boom, see Figures 1 to 6As shown, the device includes a lifting arm 1 and a telescopic arm 2 that moves movably along the inner wall of the lifting arm 1. Pads 17 are respectively provided on the top wall 15 and side wall 16 of the lifting arm 1, serving a guiding function. Pressure retraction wheels 3 are provided on the bottom wall 11 of the lifting arm 1, preferably two pressure retraction wheels 3 arranged side-by-side. When the end of the telescopic arm 2 is pulled diagonally upwards, a tray 21 is provided at the end of the telescopic arm 2. If the tray 21 is pulled diagonally upwards, the end of the telescopic arm 2 will tilt upwards. The pressure retraction wheel 3, under the action of its internal spring, bounces up and protrudes from the bottom wall 11, meaning the top of the pressure retraction wheel 3 is higher than the bottom wall 11. Then, when the telescopic arm 2 is pulled outwards, the telescopic arm 2 and the bottom wall 11 slide relative to each other through the pressure retraction wheel 3, significantly reducing friction. When the telescopic arm 2 is unloaded or under load, under the action of gravity or the pressure of the load, the spring inside the pressure retraction wheel 3 is compressed, causing its top to be flush with the bottom wall 11.

[0029] Specifically, see Figures 1 to 6 In a preferred embodiment, the lifting arm 1 is an articulated arm, that is, the lifting arm 1 includes a first arm 12 and a second arm 13, and a movable joint 14 is provided between the first arm 12 and the second arm 13. The first arm 12 swings relative to the second arm 13 with the movable joint 14 as the center. In order to ensure the load capacity of the lifting arm 1, a first reinforcing plate 121 and a second reinforcing plate 122 are respectively provided on the top surface and the bottom surface of the first arm 12.

[0030] See Figures 1 to 6 The working principle of the pressure retraction wheel 3 is as follows: A support plate 31 is fixed below the second reinforcing plate 122; a first housing 32 and a second housing 33 are installed side by side above the support plate 31. Both the first housing 32 and the second housing 33 penetrate the second reinforcing plate 122 and the bottom wall 11 of the lifting arm 1, but neither the first housing 32 nor the second housing 33 protrudes from the bottom wall 11; pressure retraction wheels 3 are respectively installed inside the first housing 32 and the second housing 33. The pressure retraction wheel 3 is also called a gravity stop wheel or a heavy pressure retraction wheel. It is equipped with a spring inside. Under a certain gravity or pressure, the pressure retraction wheel 3 retracts. When the gravity or pressure decreases to a certain extent, the pressure retraction wheel retracts. The retractable roller 3 returns to its original position, and the retractable pressure roller 3 can rotate after returning to its original position. To stably install the pressure roller 3, fasteners 34 are respectively provided at both ends of the first housing 32 and the second housing 33. The fasteners 34 pass through the bottom wall 11 of the lifting arm 1 and the second reinforcing plate 122 and are locked to the support plate 31. The support plate 31 is fastened to the bottom of the second reinforcing plate 122, forming two parallel pressure rollers 3 supported by the support plate 31. To ensure the normal operation of the pressure roller 3, the rotation center of the pressure roller 3 is lower than the bottom wall 11, that is, when not subjected to gravity or pressure, less than 1 / 2 of the pressure roller 3 protrudes from the bottom wall 11.

[0031] In this embodiment, the telescopic arm 2 is movably disposed within the lifting arm 1. The bottom wall 11 of the lifting arm 1 is provided with a pressure retraction wheel 3, which changes the main frictional force between the telescopic arm 2 and the lifting arm 1 to rolling friction, significantly reducing the frictional force experienced by the telescopic arm 2 during movement. Specifically, when the telescopic arm 2 needs to be pulled out, the end (tray) of the telescopic arm 2 is pulled upward at an angle. The pressure retraction wheel 3 springs up and protrudes from the bottom wall 11, and the telescopic arm 2 moves with the rolling assistance of the pressure retraction wheel 3, improving the convenience for the operator to pull out the telescopic arm. When the telescopic arm 2 is unloaded or under load, the pressure retraction wheel 3 is compressed by pressure, and its top is flush with the bottom wall 11. The frictional force between the inner walls of the telescopic arm 2 and the lifting arm 1 is restored, and they remain relatively stationary. Example 2

[0032] This embodiment discloses a specific implementation of a vehicle lift.

[0033] The vehicle lift includes several lifting columns, which drive the roller-type telescopic lifting arm described in Embodiment 1 to rise and fall, making it easier for the lifting arm of the vehicle lift to extend and retract.

[0034] The vehicle lift in Example 2 is the same as that in Example 1, and will not be repeated here.

Claims

1. A roller-type telescopic lifting arm, characterized in that, Includes a lifting arm and a telescopic arm that moves movably along the inner wall of the lifting arm; The bottom wall of the lifting arm is provided with a pressure retraction wheel; Pulling the end of the telescopic arm diagonally upward causes the pressure retraction wheel to spring up and protrude from the bottom wall; When the telescopic arm is unloaded or under load, the top of the pressure retraction wheel is flush with the bottom wall.

2. The roller-type telescopic lifting arm as described in claim 1, characterized in that, The lifting arm is an articulated arm.

3. The roller-type telescopic lifting arm as described in claim 1 or 2, characterized in that, The lifting arm includes a first arm and a second arm, and the first arm and the second arm are provided with movable joints.

4. The roller-type telescopic lifting arm as described in claim 3, characterized in that, The top and bottom surfaces of the first arm are respectively provided with a first reinforcing plate and a second reinforcing plate.

5. The roller-type telescopic lifting arm as described in claim 4, characterized in that, The lower fixed support plate of the second reinforcing plate; A first housing and a second housing are installed above the support plate, and both the first housing and the second housing penetrate the second reinforcing plate and the lifting arm. Pressure contraction rollers are respectively installed in the first housing and the second housing.

6. The roller-type telescopic lifting arm as described in claim 5, characterized in that, Fasteners are provided at both ends of the first housing and the second housing, and the fasteners pass through the lifting arm and the second reinforcing plate and are locked to the support plate.

7. The roller-type telescopic lifting arm as described in claim 5, characterized in that, The rotation center of the pressure contraction wheel is lower than the bottom wall.

8. The roller-type telescopic lifting arm as described in claim 3, characterized in that, A tray is provided at the end of the telescopic arm.

9. The roller-type telescopic lifting arm as described in claim 3, characterized in that, Pads are provided on the top and side walls of the lifting arm.

10. A vehicle lift, characterized in that, It includes several lifting columns, which drive the roller-type telescopic lifting arm as described in any one of claims 1-9 to rise and fall.

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