Self-centering fetal elevators

Abstract

This utility model relates to a self-centering tire lifter, comprising a base system and a column system. The base system includes a base, a lateral position adjustment component, and a base plate. The column system includes a column, a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device, and a control unit. The lateral position adjustment component and the base plate are mounted on the base, and the lateral position adjustment component can adjust the lateral position of the base plate. The column is mounted on the base plate, and the longitudinal position adjustment component, the tire clamping component, the auxiliary locking device, and the control unit are mounted on the column. The longitudinal position adjustment component is connected to the tire clamping component and can adjust the longitudinal position of the tire clamping component. The control unit is signal-connected to the lateral position adjustment component, the longitudinal position adjustment component, the tire clamping component, and the auxiliary locking device. This utility model achieves automatic lateral and longitudinal tire positioning, can be adapted to different models of balancing machines, and improves the docking accuracy between the tire and the balancing machine spindle and the operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automobile tire technology, specifically to a self-centering tire lifter, and more particularly to a self-centering tire lifter suitable for balancing machines. Background Technology

[0002] In tire balancing operations, self-centering tire lifters, as key equipment for auxiliary handling and positioning, still have significant shortcomings in their current technological solutions, making it difficult to meet the demands for high efficiency and adaptability. Currently, mainstream equipment generally relies on manual intervention to complete key steps in its core operation process: after the equipment lifts the tire to a preset height, the operator must manually push the tire back and forth to precisely align it with the balancing machine's main shaft and complete the push-in action. Subsequently, the operator must manually insert the cone blocks and locking sleeves one by one into the main shaft to secure the tire. This series of manual operations not only prolongs the balancing cycle of a single tire and increases the operator's workload, but also makes it prone to deviations in tire-main shaft alignment due to human error, affecting the accuracy of subsequent balancing tests.

[0003] The design flaws of existing equipment are even more pronounced in terms of self-centering height adjustment. Most products adopt a fixed height design, which can only be adapted to a single model of balancing machine or a specific tire specification. Even if some equipment supports height adjustment, it must be achieved manually, which is time-consuming and labor-intensive. Moreover, due to the limitations of the mechanical structure, the adjustment range is small and cannot cover the differences in spindle height between different brands and models of balancing machines. This limitation often leads to difficulties in integration when the equipment is deployed across production lines or used with newly purchased balancing machines. Additional shims or mechanical modifications are required, which not only increases the cost of equipment use but also reduces the flexibility of production operations. Utility Model Content

[0004] The purpose of this invention is to provide a self-centering tire lifter, which solves the problem that traditional tire lifters rely on manual operation for docking and cannot be adapted to different models of balancing machines.

[0005] To achieve the above objectives, this utility model

[0006] A self-centering tire lifter is provided, including a base system and a column system. The base system includes a base, a lateral position adjustment component, and a base plate. The column system includes a column, a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device, and a control unit.

[0007] The base is provided with a lateral position adjustment component and a base plate. The lateral position adjustment component can adjust the lateral position of the base plate.

[0008] A column is provided on the base plate, and a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device and a control unit are provided on the column. The longitudinal position adjustment component is connected to the tire clamping component and can adjust the longitudinal position of the tire clamping component.

[0009] The control unit is signal-connected to the lateral position adjustment component, the longitudinal position adjustment component, the tire clamping component, and the auxiliary locking device.

[0010] Preferably, the base is provided with a pneumatic air source processing device, which is connected to a lateral position adjustment component, a longitudinal position adjustment component and an auxiliary locking device through pipelines;

[0011] The base is connected to the column via a cable chain, and the cable chain contains pipes and cables.

[0012] The base is provided with a slope plate, which is used to assist the tire in being installed onto the tire clamping assembly.

[0013] The base is equipped with retractable casters.

[0014] Preferably, the lateral position adjustment assembly includes a lateral cylinder, a lateral distance sensor, and a lateral slide rail;

[0015] The base plate can move along the transverse slide rail under the action of the transverse cylinder, and the transverse distance measuring sensor can measure the distance the base plate moves along the slide rail;

[0016] The lateral cylinder and lateral distance sensor are connected to the control unit.

[0017] Preferably, the lateral position adjustment assembly further includes a lateral ranging rack, a rear hydraulic buffer, a front hydraulic buffer, and a limit block;

[0018] The transverse ranging rack is set parallel to the transverse slide rail and connected to the transverse ranging sensor; the rear hydraulic buffer and the front hydraulic buffer are respectively set at both ends of the transverse slide rail; the limiting block is set at the end of the transverse slide rail.

[0019] Preferably, the tire clamping assembly includes a lower pressing groove bracket and an upper lifting groove bracket, and a tire clamping space is formed between the lower pressing groove bracket and the upper lifting groove bracket;

[0020] A tactile switch is provided at the bottom of the pressure groove bracket.

[0021] Preferably, the longitudinal position adjustment assembly includes a lifting cylinder, a first linear guide rail, a second linear guide rail, and a longitudinal distance sensor;

[0022] The pressing groove bracket is connected to the first linear guide rail and can move along the first linear guide rail;

[0023] The lifting groove bracket is connected to the second linear guide rail, and the lifting groove bracket can move along the second linear guide rail under the action of the lifting cylinder.

[0024] The longitudinal distance sensor can measure the distance the lifting groove bracket moves along the second linear guide rail, as well as the distance between the lifting groove bracket and the pressing groove bracket. The longitudinal distance sensor is connected to the control unit, and the control unit is connected to the tactile switch.

[0025] The lifting cylinder and the longitudinal distance sensor are connected to the control unit.

[0026] Preferably, the longitudinal position adjustment assembly further includes a speed control valve, a solenoid valve, and a longitudinal ranging rack;

[0027] The speed control valve and the solenoid valve are connected to the lifting cylinder; the longitudinal ranging rack is set parallel to the second linear guide rail and connected to the longitudinal ranging sensor.

[0028] Preferably, the auxiliary locking device includes an adjusting handwheel, a third linear guide rail, a slotted hole, an adjusting screw, a three-axis cylinder, a locking sleeve, and a connecting plate;

[0029] The locking sleeve is connected to the three-axis cylinder and can move laterally under the action of the three-axis cylinder. The locking sleeve is mounted on the adjusting screw and the third linear guide rail through the connecting plate. The adjusting screw and the third linear guide rail are arranged in parallel longitudinally. An adjusting handwheel is provided on the adjusting screw.

[0030] The connecting plate is provided with a waist-shaped hole, and the locking sleeve can move along the length direction of the waist-shaped hole. The length direction of the waist-shaped hole is perpendicular to the length direction of the third linear guide.

[0031] The three-axis cylinder is connected to the control unit.

[0032] Preferably, it also includes a tire removal foot switch and a tire installation foot switch;

[0033] The tire removal foot switch and the tire mounting foot switch are connected to the lifting cylinder and the control unit.

[0034] Preferably, it also includes a power switch, an operating interface, and a hanging handle;

[0035] The power switch and operating interface are mounted on the column and connected to the control unit; the hanging handle is mounted on the column.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. This utility model uses a lateral position adjustment component and a longitudinal position adjustment component to achieve automatic tire lateral and longitudinal positioning, which can be adapted to different models of balancing machines. It not only shortens the docking time, but also avoids human operation errors, improves the docking accuracy between the tire and the main shaft of the balancing machine, and improves the working efficiency; it solves the problem that traditional equipment requires manual pushing of the tire to align with the main shaft of the balancing machine.

[0038] 2. This utility model uses an auxiliary locking device to lock the tires installed on the main shaft of the balancing machine, replacing the traditional manual locking operation, reducing the intensity of manual labor, and avoiding detection errors caused by uneven manual locking force, thereby improving locking efficiency and accuracy.

[0039] 3. This utility model uses a control unit that can record the lateral and longitudinal movement distance when putting on the tire. When removing the tire, it can accurately control the cylinder drive based on the recorded data to achieve rapid tire removal, thereby improving the efficiency of tire putting and removing operations. Attached Figure Description

[0040] Figure 1 This is a three-dimensional structural diagram of the present invention with a tire at one angle;

[0041] Figure 2 This is a three-dimensional structural diagram of the present invention with a tire from another angle;

[0042] Figure 3 This is a right-side view schematic diagram of the structure of this utility model with a tire;

[0043] Figure 4 This is a schematic diagram of the left-side structure of this utility model;

[0044] Figure 5 This is a three-dimensional structural schematic diagram of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of this utility model connected to the balancing machine;

[0046] Figure 7 yes Figure 6 A top-view structural diagram.

[0047] In the picture:

[0048] 1-Lowering groove bracket; 2-Drag chain; 3-Lifting groove bracket; 4-Rear hydraulic buffer; 5-Transverse cylinder; 6-Limit block; 7-Tire removal foot switch; 8-Transverse ranging rack; 9-Slope plate; 10-Tire; 11-Operating interface; 12-Power switch; 13-Hanging handle; 14-Pneumatic air source treatment device; 15-Tire mounting foot switch; 16-Transverse ranging sensor; 17-Front-end hydraulic buffer; 18-Speed ​​control valve; 19-Lifting cylinder; 20-Solenoid valve; 21-Tact switch; 22-Longitudinal ranging rack; 23-Longitudinal ranging sensor; 24-First linear guide; 25-Adjusting handwheel; 26-Third linear guide; 27-Oval hole; 28-Adjusting screw; 29-Second linear guide; 30-Three-axis cylinder; 31-Locking sleeve; 100-Self-centering tire lifter; 200-Balancing machine. Detailed Implementation

[0049] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0050] Example 1:

[0051] A self-centering fetal lifting device 100, such as Figure 1-7 As shown, the system includes a base system and a column system. The base system includes a base, a lateral position adjustment component, and a base plate. The column system includes a column, a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device, and a control unit. The lateral position adjustment component and the base plate are mounted on the base, and the lateral position adjustment component can adjust the lateral position of the base plate. The column is mounted on the base plate, and the longitudinal position adjustment component, the tire clamping component, the auxiliary locking device, and the control unit are mounted on the column. The longitudinal position adjustment component is connected to the tire clamping component and can adjust the longitudinal position of the tire clamping component. The control unit is signal-connected to the lateral position adjustment component, the longitudinal position adjustment component, the tire clamping component, and the auxiliary locking device.

[0052] Preferably, the lateral position adjustment assembly includes a lateral cylinder 5, a lateral distance sensor 16, and a lateral slide rail; the base plate can move along the lateral slide rail under the action of the lateral cylinder 5, and the lateral distance sensor 16 can measure the distance the base plate moves along the slide rail; the lateral cylinder 5 and the lateral distance sensor 16 are connected to a control unit.

[0053] Preferably, the tire clamping assembly includes a lower pressure groove bracket 1 and an upper lifting groove bracket 3, forming a tire clamping space between the lower pressure groove bracket 1 and the upper lifting groove bracket 3; a tactile switch 21 is provided at the bottom of the lower pressure groove bracket 1. The tire clamping structure employing the lower pressure groove bracket + upper lifting groove bracket + tactile switch improves the problem of unstable tire positioning in traditional equipment. The upper lifting groove bracket 3 and the lower pressure groove bracket 1 form a clamping space adapted to the tire, ensuring stable tire placement; the tactile switch can sense whether the tire is correctly placed and trigger the measurement of the tire diameter, feeding back to the control unit to initiate subsequent adjustment processes, preventing adjustment errors caused by tire placement deviations, and improving the safety and reliability of equipment operation.

[0054] Preferably, the longitudinal position adjustment assembly includes a lifting cylinder 19, a first linear guide rail 24, a second linear guide rail 29, and a longitudinal distance sensor 23; the lowering groove bracket 1 is connected to the first linear guide rail 24 and can move along the first linear guide rail 24; the uppering groove bracket 3 is connected to the second linear guide rail 29, and the uppering groove bracket 3 can move along the second linear guide rail 29 under the action of the lifting cylinder 19; the longitudinal distance sensor 23 can measure the distance the uppering groove bracket 3 moves along the second linear guide rail 29, as well as the distance between the uppering groove bracket 3 and the lowering groove bracket 1, and the longitudinal distance sensor 23 is connected to a control unit, which is connected to a tactile switch 21; the lifting cylinder 19 and the longitudinal distance sensor 23 are connected to the control unit.

[0055] When using, such as Figure 6 and Figure 7 As shown, because the spindle height (hereinafter referred to as "balancing spindle") of different models of balancing machines 200 varies from the ground, the self-centering tire lifter 100 needs to be paired with different models of balancing machines 200. The same model of balancing machine only needs to be paired once for continuous use. Specifically, adjust the self-centering tire lifter 100 and the balancing machine 200 to a suitable position in the X-axis direction, then align the tire center hole on the self-centering tire lifter 100 with the balancing machine spindle in the Y-axis direction. Next, measure the height of the balancing machine spindle from the ground and input the height value into the self-centering tire lifter 100 to complete the equipment pairing.

[0056] Tire mounting principle: After tire 10 is pushed into the lifting groove bracket 3, the foot pedal switch 15 is pressed, and the lifting cylinder 19 lifts the lifting groove bracket 3. The bottom of the lifting groove bracket 3, where tire 10 is placed, is connected to the longitudinal distance sensor 23. The longitudinal distance sensor 23 and the longitudinal distance rack 22 are non-contact connected. When tire 10 rises to the upper surface and touches the lower pressure groove bracket 1, the lower pressure groove bracket 1 is lifted, and the touch switch 21 at the bottom of the lower pressure groove bracket 1 is triggered. At this time, the diameter of tire 10 and the distance from the tire center hole to the ground can be calculated. The longitudinal distance sensor 23 measures the distance moved to the ground and saves the record; then... Based on the known height of the balancing machine's main shaft above the ground, the control unit of the self-centering tire lifter 100 can control the lifting cylinder 19 to move to the position where the center hole of the tire is aligned with the balancing machine's main shaft. Once the alignment is successful, the control unit activates the lateral cylinder 5, which drives the column system carrying the tire 10 to move. When the end face of the tire 10's hub contacts the end face of the balancing machine 200, the lateral cylinder 5 stops moving. The lateral distance sensor 16 measures the current lateral movement distance and saves the record. At this point, the tire mounting action with the balancing machine 200 is completed. Simultaneously, the control unit activates the auxiliary locking device for pushing the locking nut, which pushes it until the cone end face is pressed and tightened after a delay of several seconds, completing the tire mounting.

[0057] Tire removal principle: When the balancing machine 200 finishes its work, step on the tire removal foot switch 7. Because the control unit of the self-centering tire lifter 100 has saved the lateral and longitudinal movement distances of the previous tire, the tire removal work will be performed automatically (the cone block and locking nut need to be removed before starting the tire removal) - the tire returns to the original position of the original tire.

[0058] By employing a linked structure of lateral position adjustment components, longitudinal position adjustment components, and a control unit, the problem of manually pushing the tire to align with the main shaft of the balancing machine, as required by traditional equipment, is solved. The control unit can precisely control the cylinder drive and record the lateral and longitudinal movement distances, achieving automatic tire positioning in both directions without manual intervention. This shortens the docking time, avoids human error, and improves the docking accuracy between the tire and the main shaft, as well as operational efficiency.

[0059] For example, the transverse cylinder 5 is a rodless cylinder.

[0060] Preferably, the auxiliary locking device includes an adjusting handwheel 25, a third linear guide rail 26, a slotted hole 27, an adjusting screw 28, a three-axis cylinder 30, a locking sleeve 31, and a connecting plate; the locking sleeve 31 is connected to the three-axis cylinder 30 and can move laterally under the action of the three-axis cylinder 30; the locking sleeve 31 is mounted on the adjusting screw 28 and the third linear guide rail 26 through the connecting plate; the adjusting screw 28 and the third linear guide rail 26 are arranged parallel to each other longitudinally; the adjusting handwheel 25 is provided on the adjusting screw 28; the connecting plate is provided with a slotted hole 27; the locking sleeve 31 can move along the length direction of the slotted hole 27; the length direction of the slotted hole 27 is perpendicular to the length direction of the third linear guide rail 26; the three-axis cylinder 30 is connected to the control unit.

[0061] The locking sleeve 31 is used to push the locking nut to secure the tire 10 to the main shaft of the balancing machine. The longitudinal position (Z-axis) of the locking sleeve 31 can be adjusted by adjusting the handwheel 25, and the lateral position (Y-axis) of the locking sleeve can be adjusted by the oblong hole 27. The automatic locking structure using an auxiliary locking device replaces the traditional manual insertion of the cone block and locking sleeve. The three-axis cylinder 30 drives the locking sleeve 31 to automatically align with the main shaft of the balancing machine to complete the locking. The adjusting screw 28 and oblong hole 27 can fine-tune the position of the locking sleeve 31, adapting to different models of balancing machines, reducing manual labor intensity, and avoiding detection errors caused by uneven manual locking force, thus improving locking efficiency and accuracy.

[0062] Preferably, the base is equipped with a pneumatic air source processing device 14, which is connected to a lateral position adjustment component, a longitudinal position adjustment component, and an auxiliary locking device via pipelines. The base is connected to the column via a cable carrier 2, which contains pipelines and cables. The pneumatic air source processing device 14 can stably supply air to each pneumatic component, ensuring operational stability. The cable carrier 2 organizes the pipelines and cables, preventing them from becoming tangled and damaged.

[0063] Example 2:

[0064] This embodiment is an improvement based on embodiment 1. The specific improvement is that: a slope plate 9 is provided on the base, which is used to assist the tire in being installed on the tire clamping assembly; and retractable rollers are provided on the base.

[0065] For example, the slope plate 9 is provided with a pattern to achieve tire anti-slip. The retractable rollers facilitate the movement of the equipment between different workstations, solving the problem of traditional equipment being fixed and difficult to adapt to multiple balancing machines, thus improving the flexibility of equipment use; at the same time, it is easy to adjust the relative positions of the self-centering tire lifter 100 and the balancing machine 200 on the X and Y axes.

[0066] Example 3:

[0067] This embodiment is an improvement based on Embodiment 1 or Embodiment 2. The specific improvement is that the lateral position adjustment component further includes a lateral ranging rack 8, a rear hydraulic buffer 4, a front hydraulic buffer 17, and a limiting block 6; the lateral ranging rack 8 is arranged parallel to the lateral slide rail and connected to the lateral ranging sensor 16; the rear hydraulic buffer 4 and the front hydraulic buffer 17 are respectively arranged at both ends of the lateral slide rail; and the limiting block 6 is arranged at the end of the lateral slide rail.

[0068] For example, the limiting block 6 is a seated linear bearing limiting block. The main function of the limiting block 6 is to limit the base plate (or the column system on the base plate) and prevent it from sliding out of the lateral slide rail. The rear hydraulic buffer 4 and the front hydraulic buffer 17 are mainly used to buffer the lateral movement of the base plate.

[0069] The lateral ranging rack 8 can assist the lateral ranging sensor 16 in measuring distance, or facilitate direct observation of the lateral movement distance by humans.

[0070] Example 4:

[0071] This embodiment is an improvement based on Embodiment 1, Embodiment 2 or Embodiment 3. The specific improvement is that the longitudinal position adjustment component further includes a speed control valve 18, a solenoid valve 20, and a longitudinal ranging rack 22; the speed control valve 18 and the solenoid valve 20 are connected to the lifting cylinder 19; the longitudinal ranging rack 22 is arranged parallel to the second linear guide rail 29 and connected to the longitudinal ranging sensor 23.

[0072] Speed ​​control valve 18 can adjust the speed of the push rod of lifting cylinder 19. Solenoid valve 20 can control the air path of lifting cylinder 19.

[0073] The longitudinal ranging rack 22 can assist the longitudinal ranging sensor 23 in measuring distance, or facilitate direct observation of the longitudinal movement distance by humans.

[0074] Example 5:

[0075] This embodiment is an improvement on Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4. Specifically, it includes a tire removal foot switch 7 and a tire mounting foot switch 15; these foot switches are connected to the lifting cylinder 19 and the control unit. It also includes a power switch 12, an operating interface 11, and a hanging handle 13; the power switch 12 and the operating interface 11 are mounted on the column and connected to the control unit; the hanging handle 13 is mounted on the column.

[0076] The tire removal foot switch 7 and the tire mounting foot switch 15 connect to the control unit and the solenoid valve 20 of the lifting cylinder 19, enabling the lifting cylinder 19 to move. Operators can control tire lifting and lowering via the foot switches, eliminating the need for frequent manual button operation. The operation interface 11 allows for intuitive parameter setting and equipment status monitoring, solving the problems of complex operation and the need for long-term dedicated personnel in traditional equipment, lowering the operational threshold and improving single-person work efficiency. The power switch 12 controls the power supply to the self-centering tire lifter 100. The hanging handle 13 is used for hanging tools or accessories used during operation.

[0077] In this utility model, the use of directional terms such as "upper," "lower," "left," "right," "bottom," and "top" is defined relative to the directions shown in the accompanying drawings and is used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These or other directional terms should not be construed as restrictive terms.

[0078] In this utility model, the use of words such as "a," "an," "a kind," and "the" does not indicate a quantity limitation and can represent singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this utility model are intended to cover non-exclusive inclusion; the terms "first," "second," and "third" used in this utility model are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0079] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0080] Furthermore, this utility model does not discuss in detail the technologies and equipment known to those skilled in the art, but where appropriate, such technologies and equipment should be considered part of the specification.

[0081] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A self-centering fetal lifting device, characterized in that, It includes a base system and a column system. The base system includes a base, a lateral position adjustment component and a base plate. The column system includes a column, a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device and a control unit. The base is provided with a lateral position adjustment component and a base plate. The lateral position adjustment component can adjust the lateral position of the base plate. A column is provided on the base plate, and a longitudinal position adjustment component, a tire clamping component, an auxiliary locking device and a control unit are provided on the column. The longitudinal position adjustment component is connected to the tire clamping component and can adjust the longitudinal position of the tire clamping component. The control unit is signal-connected to the lateral position adjustment component, the longitudinal position adjustment component, the tire clamping component, and the auxiliary locking device.

2. The self-centering fetal lifting device according to claim 1, characterized in that, The base is provided with a pneumatic air source processing device (14), which is connected to a horizontal position adjustment component, a vertical position adjustment component and an auxiliary locking device through a pipeline. The base is connected to the column via a drag chain (2), and the drag chain (2) contains pipes and cables; The base is provided with a slope plate (9), which is used to assist the tire in being installed onto the tire clamping assembly. The base is equipped with retractable casters.

3. The self-centering fetal lifting device according to claim 1, characterized in that, The lateral position adjustment assembly includes a lateral cylinder (5), a lateral distance sensor (16), and a lateral slide rail; The base plate can move along the transverse slide rail under the action of the transverse cylinder (5), and the transverse distance sensor (16) can measure the distance the base plate moves along the slide rail; The lateral cylinder (5) and the lateral distance sensor (16) are connected to the control unit.

4. The self-centering fetal lifting device according to claim 3, characterized in that, The lateral position adjustment assembly also includes a lateral ranging rack (8), a rear hydraulic buffer (4), a front hydraulic buffer (17), and a limit block (6). The transverse ranging rack (8) is set parallel to the transverse slide rail and connected to the transverse ranging sensor (16); the rear hydraulic buffer (4) and the front hydraulic buffer (17) are respectively set at both ends of the transverse slide rail; the limiting block (6) is set at the end of the transverse slide rail.

5. The self-centering fetal lifting device according to claim 1, characterized in that, The tire clamping assembly includes a lower pressure groove bracket (1) and an upper lifting groove bracket (3), and a tire clamping space is formed between the lower pressure groove bracket (1) and the upper lifting groove bracket (3); A tactile switch (21) is provided at the bottom of the pressure groove bracket (1).

6. The self-centering fetal lifting device according to claim 5, characterized in that, The longitudinal position adjustment assembly includes a lifting cylinder (19), a first linear guide rail (24), a second linear guide rail (29), and a longitudinal distance sensor (23). The downward groove bracket (1) is connected to the first linear guide rail (24) and can move along the first linear guide rail (24); The lifting groove bracket (3) is connected to the second linear guide rail (29), and the lifting groove bracket (3) can move along the second linear guide rail (29) under the action of the lifting cylinder (19); The longitudinal distance sensor (23) can measure the distance that the lifting groove bracket (3) moves along the second linear guide rail (29) and the distance between the lifting groove bracket (3) and the pressing groove bracket (1). The longitudinal distance sensor (23) is connected to the control unit, and the control unit is connected to the tactile switch (21). The lifting cylinder (19) and the longitudinal distance sensor (23) are connected to the control unit.

7. The self-centering fetal lifting device according to claim 6, characterized in that, The longitudinal position adjustment assembly also includes a speed control valve (18), a solenoid valve (20), and a longitudinal ranging rack (22). The speed control valve (18) and the solenoid valve (20) are connected to the lifting cylinder (19); the longitudinal ranging rack (22) is set parallel to the second linear guide rail (29) and connected to the longitudinal ranging sensor (23).

8. The self-centering fetal lifting device according to claim 1, characterized in that, The auxiliary locking device includes an adjusting handwheel (25), a third linear guide rail (26), a waist-shaped hole (27), an adjusting screw (28), a three-axis cylinder (30), a locking sleeve (31), and a connecting plate; The locking sleeve (31) is connected to the three-axis cylinder (30) and can move laterally under the action of the three-axis cylinder (30). The locking sleeve (31) is mounted on the adjusting screw (28) and the third linear guide (26) through the connecting plate. The adjusting screw (28) and the third linear guide (26) are arranged in parallel longitudinally. An adjusting handwheel (25) is provided on the adjusting screw (28). The connecting plate is provided with a waist-shaped hole (27), and the locking sleeve (31) can move along the length direction of the waist-shaped hole (27). The length direction of the waist-shaped hole (27) is perpendicular to the length direction of the third linear guide (26). The three-axis cylinder (30) is connected to the control unit.

9. The self-centering fetal lifting device according to claim 1, characterized in that, It also includes a tire removal foot switch (7) and a tire mounting foot switch (15); The tire removal foot switch (7) and the tire mounting foot switch (15) are connected to the lifting cylinder (19) and the control unit.

10. The self-centering fetal lifting device according to claim 1, characterized in that, It also includes a power switch (12), an operation interface (11), and a hanging handle (13). The power switch (12) and the operation interface (11) are mounted on the column and connected to the control unit; the hanging handle (13) is mounted on the column.

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