A fixing device for maintenance

Abstract

The utility model application relates to the technical field of automobile maintenance, concretely relates to a fixing device for maintenance, be applied to the automobile maintenance, including the fixed device main part, the downside of fixed device main part is provided with the conical part for strengthening the friction resistance between fixed device main part and ground, the upside of fixed device main part is provided with the extrusion plate for strengthening the extrusion pressure between fixed device main part and car. Through the first drive mechanism drive conical part and ground extrude, make conical part have the force opposite to the sliding direction of fixed device main part and car, and when fixed device main part has the tendency of moving back, the locking force of conical part is not affected, thereby strengthen the antiskid ability of fixed device main part to car, solved the ratchet pawl difficult long -term resistance sustained reverse load, thereby cause displacement or slack, the technical problem that the fixing effect of fixed device is not enough stable.

Description

Technical Field

[0001] This utility model application relates to the field of automotive repair technology, specifically to a fixing device for repair. Background Technology

[0002] A maintenance fixing device is a device used during maintenance or repair to prevent wheels from rolling or moving due to unexpected circumstances. Maintenance fixing devices are usually used for wheels that need to be stationary or fixed. The main function of a maintenance fixing device is to prevent the wheel from rolling or slipping due to human operation or external interference during maintenance by fixing the wheel in a certain position, thereby ensuring the safety of the operator and the smooth progress of maintenance work.

[0003] Chinese Patent Publication No. CN219006040U discloses a fixing device for motor vehicle repair, relating to the field of motor vehicle repair technology. It includes a first fixing mechanism, with a second fixing mechanism connected to one side of the first fixing mechanism. The first fixing mechanism includes a first movable seat, with a second movable seat connected to one side of the first movable seat. A connecting rod is fixed to the outer wall of the first movable seat, and a slider is connected to the outer wall of the connecting rod. A spring is installed at the end of the connecting rod. The slider is slidably connected to the inner wall of the second movable seat. The second fixing mechanism includes a third movable seat. In this invention, when fixing a motor vehicle parked on an inclined road surface, the fixing device can be positioned in front of and behind the bottom of the wheel. By rotating the pawl, the friction between the device and the ground is increased, enhancing the fixing effect on the motor vehicle and improving the efficiency of motor vehicle repair.

[0004] The aforementioned patent mentions that the pawl, when rotated by a person, allows its end to abut against the ground, increasing the friction between the fixing device and the ground. However, when the pawl is installed with the movable seat, it needs to be rotated and pressed against the ground. When the car tends to move backward, the fixing device is subjected to an axial force opposite to the tightening direction of the thread. The threaded pawl will be affected by the reverse load, weakening the preload and causing a relative sliding tendency between the thread teeth. This makes it difficult for the pawl to resist continuous reverse load for a long time, thus causing displacement or loosening, making the fixing effect of the fixing device unstable. Therefore, we propose a fixing device for maintenance. Utility Model Content

[0005] To address the aforementioned issues, a maintenance fixing device is provided. A first driving mechanism drives a conical component to press against the ground, causing the conical component to exert a force on the fixing device body opposite to the direction of the vehicle's sliding. Even when the fixing device body tends to move backward, the locking force of the conical component remains unaffected, thereby enhancing the anti-slip capability of the fixing device body for the vehicle. This solves the technical problem that the pawl cannot withstand continuous reverse loads for a long time, leading to displacement or loosening and making the fixing effect of the device unstable.

[0006] To address the existing technical problems, this utility model application provides a fixing device for maintenance, applied in automobile maintenance, comprising a fixing device body, a tapered member provided on the lower side of the fixing device body to enhance the frictional resistance between the fixing device body and the ground; a pressing plate provided on the upper side of the fixing device body to enhance the squeezing force between the fixing device body and the automobile; and a pressurizing mechanism provided on the fixing device body to enhance the sliding resistance of the tapered member and the pressing plate on the automobile.

[0007] Preferably, the pressurizing mechanism includes a first driving mechanism, a second driving mechanism, and a transmission assembly; the first driving mechanism is disposed between the main body of the fixed device and the conical member, and the first driving mechanism is used to drive the conical member to move; the second driving mechanism is disposed between the main body of the fixed device and the extrusion plate, and the second driving mechanism is used to drive the extrusion plate to move; the transmission assembly is disposed on the first driving mechanism and the second driving mechanism, and the transmission assembly is used to realize the synchronous operation drive of the first driving mechanism and the second driving mechanism.

[0008] Preferably, the first driving mechanism includes a first displacement mechanism and a first guiding mechanism; the first displacement mechanism is disposed between the conical member and the main body of the fixing device, and the first displacement mechanism is used to drive the conical member to contact the ground; the first guiding mechanism is disposed on the first displacement mechanism, and the first guiding mechanism is used to cooperate with the conical member to move linearly.

[0009] Preferably, the first displacement mechanism includes a first connecting pipe and a first screw; the first connecting pipe is slidably disposed within the main body of the fixing device and is connected to a tapered member; the first screw is rotatably disposed within the main body of the fixing device, the first screw is threadedly connected to the first connecting pipe, and the first screw is connected to the working end on one side of the transmission assembly.

[0010] Preferably, the first guiding mechanism includes a first slider and a first slide groove; the first slider is connected to a first connecting pipe; the first slide groove is formed on the side of the fixing device body near the first slider, and the first slide groove is used to cooperate with the first slider to move linearly.

[0011] Preferably, the second driving mechanism includes a second displacement mechanism and a second guiding mechanism; the second displacement mechanism is disposed between the extrusion plate and the main body of the fixing device, and the second displacement mechanism is used to drive the extrusion plate to contact the tire of the automobile; the second guiding mechanism is disposed on the second displacement mechanism, and the second guiding mechanism is used to cooperate with the extrusion plate to move linearly.

[0012] Preferably, the second displacement mechanism includes a second connecting pipe and a second screw; the second connecting pipe is slidably disposed within the main body of the fixing device and is connected to the extrusion plate; the second screw is rotatably disposed within the main body of the fixing device, the second screw is threadedly connected to the second connecting pipe, and the second screw is connected to the working end of the transmission assembly away from the first screw.

[0013] Preferably, the second guide mechanism includes a second slider and a second slide groove; the second slider is connected to the second connecting pipe; the second slide groove is opened on the side of the fixing device body near the second slider, and the second slide groove is used to cooperate with the second slider to move linearly.

[0014] The advantages of this utility model application compared to the prior art are:

[0015] 1. The first drive mechanism drives the conical part to press against the ground, so that the conical part exerts a force on the main body of the fixing device opposite to the direction of the car's sliding. When the main body of the fixing device tends to move backward, the locking force of the conical part is not affected, thereby strengthening the anti-slip ability of the main body of the fixing device on the car. This solves the technical problem that the pawl is difficult to resist continuous reverse load for a long time, which leads to displacement or loosening and makes the fixing effect of the fixing device unstable.

[0016] 2. The second drive mechanism drives the extrusion plate to press against the car tire to form a flexible friction interface. The viscoelastic deformation of the flexible interface can absorb the impact energy when the vehicle moves backward, which solves the technical problem that rigid contact cannot effectively buffer dynamic loads, resulting in impact damage to the maintenance fixing device and a decrease in fixing reliability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the main body and conical component of a maintenance fixing device and its connecting structure.

[0018] Figure 2 This is a three-dimensional schematic diagram of the main body of a maintenance fixing device, the extrusion plate, and its connecting structure.

[0019] Figure 3 This is a three-dimensional schematic diagram of a conical component and an extrusion plate, as well as their connecting structure, for a maintenance fixing device.

[0020] Figure 4 This is a three-dimensional schematic diagram of the second connecting pipe and the second slider of a maintenance fixing device and their connection structure.

[0021] Figure 5 A type of maintenance fixture Figure 3 Enlarged diagram of point A in the middle.

[0022] Figure 6 A type of maintenance fixture Figure 4 Enlarged diagram of point B in the middle.

[0023] The following are the labels in the diagram: 1. Main body of the fixing device; 2. Conical part; 21. Extrusion plate; 22. Transmission assembly; 23. First connecting pipe; 24. First screw; 25. First slider; 26. First slide groove; 27. Second connecting pipe; 28. Second screw; 29. ​​Second slider; 210. Second slide groove. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model application, the following detailed description of this utility model application is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figures 1-2 As shown, a maintenance fixing device, applied to automobile repair, includes a fixing device body 1. A conical member 2 is provided on the lower side of the fixing device body 1 to enhance the frictional resistance between the fixing device body 1 and the ground. A pressing plate 21 is provided on the upper side of the fixing device body 1 to enhance the pressure between the fixing device body 1 and the automobile. A pressurizing mechanism is provided on the fixing device body 1 to enhance the sliding resistance of the conical member 2 and the pressing plate 21 on the automobile. The pressurizing mechanism includes a first drive mechanism, a second drive mechanism, and a transmission assembly 22. The first drive mechanism is located between the fixing device body 1 and the conical member 2, and is used to drive the conical member 2 to move. The second drive mechanism is located between the fixing device body 1 and the pressing plate 21, and is used to drive the pressing plate 21 to move. The transmission assembly 22 is located on the first drive mechanism and the second drive mechanism, and is used to achieve synchronous operation of the first drive mechanism and the second drive mechanism.

[0026] Specifically, the surface of the extrusion plate 21 is provided with a deformable rubber strip.

[0027] When the maintenance fixing device is put into use, the main body 1 of the fixing device is placed behind the car tire, so that the main body 1 of the fixing device is in close contact with the car tire. The conical member 2 is driven by the pressure mechanism to press against the ground, at which time the conical member 2 pushes the main body 1 of the fixing device against the car tire. At the same time, the pressure mechanism drives the compression plate 21 to approach the car tire and apply compression. Since the surface of the compression plate 21 is provided with a deformable rubber strip, the friction between the compression plate 21 and the car tire is enhanced, so that the main body 1 of the fixing device is stably limited between the car tire and the ground. When the car tends to move backward and pushes the main body 1 of the fixing device backward, the conical member 2 can support the main body 1 of the fixing device and prevent the main body 1 of the fixing device from shifting.

[0028] See Figures 1-6 As shown, the first driving mechanism includes a first displacement mechanism and a first guiding mechanism; the first displacement mechanism is disposed between the conical member 2 and the fixed device body 1, and is used to drive the conical member 2 to contact the ground; the first guiding mechanism is disposed on the first displacement mechanism, and is used to cooperate with the conical member 2 to move linearly; the first displacement mechanism includes a first connecting pipe 23 and a first screw 24; the first connecting pipe 23 is slidably disposed in the fixed device body 1 and is connected to the conical member 2; the first screw 24 is rotatably disposed in the fixed device body 1, and is threadedly connected to the first connecting pipe 23, and is connected to the working end of the transmission assembly 22 on one side; the first guiding mechanism includes a first slider 25 and a first slide groove 26; the first slider 25 is connected to the first connecting pipe 23; the first slide groove 26 is opened on the side of the fixed device body 1 near the first slider 25, and is used to cooperate with the first slider 25 to move linearly.

[0029] Specifically, the transmission assembly 22 is composed of meshing bevel gears, and the bevel gears on both sides of the transmission assembly 22 are connected to the first screw 24 and the second screw 28, respectively. The first slider 25 forms a sliding fit with the first slide groove 26.

[0030] When operating the maintenance fixing device, the main body 1 of the fixing device is placed behind the car tire. The first screw 24 is driven to rotate by the bevel gear in the middle of the rotation transmission assembly 22, utilizing the meshing transmission characteristics of the bevel gear. Due to the sliding fit between the first slider 25 and the first groove 26, the first connecting pipe 23 will not rotate synchronously with the first screw 24. Furthermore, because the first connecting pipe 23 and the first screw 24 are connected by a thread, the first connecting pipe 23 can be displaced along the axis of the first screw 24, simultaneously causing the first slider 25 to slide within the first groove 26, thereby achieving stable linear motion of the first connecting pipe 23.

[0031] The first connecting pipe 23 drives the conical part 2 to press against the ground to form a rigid support. The conical part 2 and the ground form a support base point. The upward vertical and horizontal components are generated by the reaction force of the inclined plane. The horizontal component of the conical part 2 drives the main body 1 of the fixing device to move towards the tire, causing the main body 1 of the fixing device to move towards the car tire and perform compression. A bidirectional compression effect is formed between the main body 1 of the fixing device and the tire: on the one hand, the conical part 2 is embedded in the ground to provide support reaction force, and on the other hand, the main body 1 of the fixing device is close to the tire surface. The combined effect of friction and compression force counteracts the tendency of the tire to move backward.

[0032] When the vehicle suddenly moves backward, the reaction force of the conical component 2 can respond quickly to the dynamic impact load. Since the conical structure has mechanical force amplification characteristics similar to the wedge principle, the small vertical displacement of the conical component 2 can generate a large lateral extrusion force, which can effectively suppress the backward movement of the tire in a short time.

[0033] See Figures 1-6 As shown, the second driving mechanism includes a second displacement mechanism and a second guiding mechanism. The second displacement mechanism is disposed between the extrusion plate 21 and the main body 1 of the fixing device, and is used to drive the extrusion plate 21 to contact the tire of the vehicle. The second guiding mechanism is disposed on the second displacement mechanism and is used to cooperate with the extrusion plate 21 to move linearly. The second displacement mechanism includes a second connecting pipe 27 and a second screw 28. The second connecting pipe 27 is slidably disposed in the main body 1 of the fixing device and is connected to the extrusion plate 21. The second screw 28 is rotatably disposed in the main body 1 of the fixing device and is threadedly connected to the second connecting pipe 27. The second screw 28 is connected to the working end of the transmission assembly 22 away from the first screw 24. The second guiding mechanism includes a second slider 29 and a second slide groove 210. The second slider 29 is connected to the second connecting pipe 27. The second slide groove 210 is opened on the side of the main body 1 of the fixing device close to the second slider 29 and is used to cooperate with the second slider 29 to move linearly.

[0034] Specifically, the second slider 29 and the second groove 210 form a sliding fit.

[0035] When the bevel gear in the middle of the rotary transmission assembly 22 is rotated, the second screw 28 rotates synchronously with the first screw 24 by utilizing the meshing transmission characteristics of the bevel gear. When the second screw 28 rotates, the second slider 29 will not rotate with the second screw 28 because it forms a sliding fit with the second slide groove 210. Furthermore, since the second connecting pipe 27 is threadedly connected to the second screw 28, the second connecting pipe 27 can be displaced along the axial direction of the second screw 28, which simultaneously drives the second slider 29 to slide within the second slide groove 210, thereby achieving stable linear motion of the second connecting pipe 27.

[0036] The second connecting pipe 27 drives the extrusion plate 21 to compress the car tire, forming a flexible friction interface. Simultaneously, the conical member 2, through its reaction force, pushes the main body 1 of the fixing device towards the car tire and applies pressure. The deformable rubber strip on the surface of the extrusion plate 21 fills the tire tread through elastic deformation, working in conjunction with the rigid compression of the main body 1 of the fixing device to form a composite contact interface of rigid support and flexible friction, thereby increasing the frictional resistance of the main body 1 to the car tire. Furthermore, the viscoelastic deformation of the rubber strip absorbs impact energy, which, combined with the frictional energy dissipation between the conical member 2 and the ground, reduces the impact stress of dynamic loads on the maintenance fixing device.

[0037] Working principle: When the maintenance fixing device is put into use, the bevel gear in the middle of the rotary transmission assembly 22 causes the first screw 24 and the second screw 28 to rotate synchronously. When the first screw 24 rotates, the first connecting pipe 23 can move along the first screw 24, so that the first connecting pipe 23 drives the conical part 2 to form a rigid support with the ground. When the second screw 28 rotates, the second connecting pipe 27 can move along the second screw 28, so that the second connecting pipe 27 drives the extrusion plate 21 to press against the car tire to form a flexible friction interface, thereby increasing the frictional resistance of the fixing device body 1 against the car tire. In addition, the viscoelastic deformation of the rubber strip can absorb impact energy, which, together with the frictional energy dissipation between the conical part 2 and the ground, can reduce the impact stress of dynamic loads on the maintenance fixing device.

[0038] The above embodiments only illustrate one or more implementation methods of this utility model application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model application, and these all fall within the protection scope of this utility model application. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. A fixing device for maintenance, applied in automobile maintenance, comprising a fixing device body (1), characterized in that, A tapered part (2) is provided on the lower side of the main body (1) of the fixing device to enhance the frictional resistance between the main body (1) of the fixing device and the ground. An extrusion plate (21) is provided on the upper side of the main body (1) of the fixing device to enhance the extrusion force between the main body (1) of the fixing device and the automobile. The main body (1) of the fixing device is provided with a pressurizing mechanism for enhancing the sliding resistance of the tapered part (2) and the extrusion plate (21) to the automobile.

2. The maintenance fixing device according to claim 1, characterized in that, The pressurization mechanism includes a first drive mechanism, a second drive mechanism, and a transmission assembly (22); The first driving mechanism is disposed between the main body (1) of the fixed device and the conical part (2), and the first driving mechanism is used to drive the conical part (2) to move. The second driving mechanism is located between the main body (1) of the fixed device and the extrusion plate (21). The second driving mechanism is used to drive the extrusion plate (21) to move. The transmission assembly (22) is disposed on the first drive mechanism and the second drive mechanism. The transmission assembly (22) is used to realize the synchronous operation drive of the first drive mechanism and the second drive mechanism.

3. A maintenance fixing device according to claim 2, characterized in that, The first driving mechanism includes a first displacement mechanism and a first guiding mechanism; The first displacement mechanism is located between the conical part (2) and the main body (1) of the fixing device. The first displacement mechanism is used to drive the conical part (2) to contact the ground. The first guide mechanism is set on the first displacement mechanism and is used to cooperate with the conical part (2) to move linearly.

4. A maintenance fixing device according to claim 2, characterized in that, The first displacement mechanism includes a first connecting pipe (23) and a first screw (24); The first connecting tube (23) is slidably disposed inside the main body (1) of the fixing device, and the first connecting tube (23) is connected to the conical piece (2); The first screw (24) is rotatably disposed inside the main body (1) of the fixing device. The first screw (24) is threadedly connected to the first connecting pipe (23). The first screw (24) is connected to the working end of the transmission assembly (22) on one side.

5. A maintenance fixing device according to claim 1, characterized in that, The first guiding mechanism includes a first slider (25) and a first slide groove (26); The first slider (25) is connected to the first connecting tube (23); The first slide (26) is located on the side of the main body (1) of the fixing device close to the first slider (25). The first slide (26) is used to cooperate with the first slider (25) to move linearly.

6. A maintenance fixing device according to claim 5, characterized in that, The second drive mechanism includes a second displacement mechanism and a second guide mechanism; The second displacement mechanism is located between the extrusion plate (21) and the main body (1) of the fixing device. The second displacement mechanism is used to drive the extrusion plate (21) to contact the tire of the car. The second guide mechanism is set on the second displacement mechanism and is used to cooperate with the extrusion plate (21) to move linearly.

7. A maintenance fixing device according to claim 6, characterized in that, The second displacement mechanism includes a second connecting pipe (27) and a second screw (28); The second connecting pipe (27) is slidably disposed inside the main body (1) of the fixing device, and the second connecting pipe (27) is connected to the extrusion plate (21); The second screw (28) is rotatably disposed inside the main body (1) of the fixing device. The second screw (28) is threadedly connected to the second connecting pipe (27). The second screw (28) is connected to the working end of the transmission assembly (22) away from the first screw (24).

8. A maintenance fixing device according to claim 5, characterized in that, The second guide mechanism includes a second slider (29) and a second slide (210); The second slider (29) is connected to the second connecting tube (27); The second slide (210) is provided on the side of the main body (1) of the fixing device close to the second slider (29). The second slide (210) is used to cooperate with the second slider (29) to move linearly.

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