A car tire mounting and dismounting bracket

Abstract

This utility model provides an auxiliary tire mounting and dismounting frame for automobiles, including a base frame, a lifting assembly, and a lifting mechanism. The base frame includes a base and a vertical frame, with a moving mechanism at the bottom of the base. The lifting assembly has two support arms for supporting the tire from both sides. The lifting mechanism drives the two support arms to lift and lower synchronously. When removing the tire, the mounting and dismounting frame is moved so that the two support arms are positioned below the tire on both sides. The tire is lifted to a certain height by the support arms, and the mounting and dismounting frame is moved to transfer the tire. When installing the tire, the tire is placed on the two support arms, the mounting and dismounting frame is moved near the vehicle, the tire height is adjusted, the tire is initially installed on the vehicle, the mounting and dismounting frame is removed, and the tire is secured. This utility model mechanizes tire handling, avoiding the risks of muscle strain and tire falling. Through the moving and lifting mechanisms, operators can easily and accurately control the height and position of the tire, improving the efficiency and accuracy of mounting and dismounting, and reducing impact damage to the tire and rim.

Description

Technical Field

[0001] This utility model relates to the field of vehicle maintenance equipment technology, specifically to an auxiliary tire mounting and dismounting frame for automobiles. Background Technology

[0002] Tire removal and installation is a laborious and potentially dangerous task in vehicle maintenance and repair. This is especially true for large vehicles (such as SUVs, trucks, and buses), where the tires are large and heavy. Traditional manual handling methods are time-consuming and labor-intensive, and can easily lead to muscle strains or more serious personal injuries for the operators.

[0003] Currently, tire installation often requires multiple operators to work together to lift the tire or use a pry bar to align it with the rim mounting hole. Removal also requires manual stabilization to prevent the tire from falling. This method has several drawbacks: First, manual lifting or prying can easily cause tire misalignment due to imbalance of force, increasing the difficulty of aligning the mounting hole, prolonging the operation time, and potentially causing irreversible damage to the tire bead and rim edge due to collision. Second, operators must bear the weight of the tire for extended periods, resulting in extremely high labor intensity. Exhaustion or operational errors can easily lead to the tire falling, posing a threat to personnel safety and surrounding equipment.

[0004] Therefore, there is an urgent need to provide a vehicle tire auxiliary installation and removal device that is structurally stable, easy to operate, precisely adjustable, and flexible in movement. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the technical defects of the prior art, which requires manual lifting of the tire when disassembling and assembling the tire. This not only leads to high labor intensity, but also easily causes the risk of the tire falling, posing a threat to personnel safety and surrounding equipment. At the same time, it may also cause irreversible damage to the tire bead and wheel rim edge due to collision, thereby increasing the operating cost. Therefore, this utility model provides a car tire auxiliary disassembly and assembly frame that is structurally stable, easy to operate, accurately adjustable and flexible in movement.

[0006] Therefore, this utility model provides an auxiliary tire mounting and dismounting frame for automobiles, comprising: The base frame includes a base and an upright frame disposed on top of the base, and a moving mechanism is provided at the bottom of the base; The lifting assembly has two horizontally spaced support arms for supporting the tire from both sides; A lifting mechanism is provided on the base frame and is connected to the lifting assembly in a transmission manner to drive the two lifting arms to reciprocate synchronously in the vertical direction.

[0007] Furthermore, the lifting assembly includes a bracket and two support arms fixedly disposed at the bottom of one side of the bracket; When the tire is placed on the two support arms, one side of the support arm can abut against the end face of the tire.

[0008] Furthermore, it also includes: A buffer pad is provided on one side of the bracket to abut against the end face of the tire when the tire is placed on the two support arms.

[0009] Furthermore, the support arm includes: There are two support rods, which are arranged in parallel opposite directions and are respectively fixedly connected to the bottom of one side of the bracket. The support sleeve consists of two pieces, which are rotatably fitted onto the two support rods respectively.

[0010] Furthermore, the outer circumferential surface of the support sleeve is formed with anti-slip texture.

[0011] Furthermore, the support frame has two mounting slots that open toward one side of the lifting assembly, and the two mounting slots extend vertically and are arranged in parallel and spaced apart. The lifting mechanism includes: There are two lead screws, each rotatably mounted in one of the two mounting slots; There are two lifting seats, which are respectively threaded onto the two lead screws; a portion of each lifting seat is housed in the corresponding mounting groove, and the shape of the portion is adapted to the inner cavity shape of the mounting groove, so that the lifting seat is constrained to move only in the vertical direction; the other portion of the lifting seat extends out through the opening of the mounting groove and is fixedly connected to the bracket. The drive device is connected to the two lead screws via a transmission mechanism to drive the two lead screws to rotate synchronously, thereby causing the two lifting seats to rise and fall synchronously.

[0012] Furthermore, the transmission mechanism includes a transmission box fixed to the top of the stand and a gear transmission structure disposed inside the transmission box; The gear transmission structure includes: A pair of first bevel gears are coaxially fixed at both ends of a horizontal shaft, which is rotatably supported inside the transmission box; A pair of second bevel gears are fixedly mounted on the tops of the two lead screws, and respectively mesh with the pair of first bevel gears; The first helical gear is fixedly mounted on the horizontal shaft; The second helical gear is rotatably mounted inside the transmission box and meshes with the first helical gear.

[0013] Furthermore, the driving device is a hand crank, which is rotatably mounted on the transmission box and connected to the second helical gear, and is configured to drive the second helical gear to rotate.

[0014] Furthermore, the moving mechanism includes four omnidirectional wheels disposed at the bottom of the base.

[0015] Furthermore, it also includes handrails located on both sides of the top of the support frame.

[0016] The technical solution provided by this utility model has the following advantages: The present invention relates to an auxiliary tire mounting and dismounting frame for automobiles, comprising a base frame, a lifting assembly, and a lifting mechanism; the base frame includes a base and a vertical frame disposed on top of the base, and a moving mechanism is provided at the bottom of the base; the lifting assembly has two horizontally spaced support arms for supporting tires from both sides; the lifting mechanism is disposed on the base frame and is connected to the lifting assembly for transmission, so as to drive the two support arms to reciprocate synchronously in the vertical direction.

[0017] This invention relates to a tire removal and installation method. When removing a tire, a moving mechanism moves the tire auxiliary removal and installation frame near the tire to be removed, positioning the two support arms below and on either side of the tire. A lifting mechanism adjusts the height of the support arms to contact the bottom of the tire, lifting it to a certain height. The tire auxiliary removal and installation frame is then moved to transfer the tire to the designated placement area. During this process, workers can assist in smoothly removing and transferring the tire from the vehicle. When installing a tire, the tire is first stably placed on the two support arms. Then, the moving mechanism moves the tire auxiliary removal and installation frame near the tire's installation position. The lifting mechanism adjusts the tire's height to align the tire's connecting structure (e.g., bolt holes) with the corresponding connecting structure (e.g., bolts) on the vehicle. The tire auxiliary removal and installation frame is moved to initially install the tire on the vehicle (e.g., inserting bolts into the mounting holes). The tire auxiliary removal and installation frame is then removed to secure the tire (e.g., tightening the bolts). During this process, workers can assist in smoothly installing the tire onto the vehicle.

[0018] This utility model of an auxiliary tire loading and unloading rack mechanizes tire handling, freeing operators from the arduous and dangerous task of manual lifting, and effectively avoiding the risks of muscle strain and tire drop. Through the moving and lifting mechanisms, operators can easily and precisely control the height and position of the tires, improving loading and unloading efficiency and accuracy, and reducing impact damage to the tires and rims. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the prior art or specific embodiments of this utility model, the accompanying drawings used in the description of the prior art or specific embodiments are briefly introduced below.

[0020] Figure 1 This is a schematic diagram of the overall structure of the automotive tire auxiliary mounting and dismounting frame of this utility model.

[0021] Figure 2 yes Figure 1 Another stereoscopic view.

[0022] Figure 3 This is an exploded view after the transmission box has been removed.

[0023] Figure 4 It is a sectional view.

[0024] Figure 5 This is a diagram illustrating the usage status.

[0025] Reference numerals: 01, tire; 1, base frame; 11, base; 12, upright frame; 120, mounting slot; 13, caster wheel; 14, handrail; 2, lifting assembly; 21, support arm; 211, support rod; 212, support sleeve; 22, bracket; 23, buffer pad; 31, lead screw; 32, lifting seat; 33, transmission box; 34, first bevel gear; 35, horizontal shaft; 36, second bevel gear; 37, first helical gear; 38, second helical gear; 39, hand crank. Detailed Implementation

[0026] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0027] It should be noted that the terms "first," "second," etc., in the claims and specification of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0029] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] This embodiment provides an auxiliary tire mounting and dismounting bracket for automobiles, such as... Figures 1-5 As shown, it includes a base frame 1, a lifting assembly 2, and a lifting mechanism; the base frame 1 includes a base 11 and a vertical frame 12 disposed on top of the base 11, and a moving mechanism is provided at the bottom of the base 11; the lifting assembly 2 has two horizontally spaced support arms 21 for supporting tires from both sides; the lifting mechanism is disposed on the base frame 1 and is connected to the lifting assembly 2 for transmission, so as to drive the two support arms 21 to move synchronously and reciprocally in the vertical direction.

[0031] In this embodiment, the base 11 can be an approximately rectangular or other shaped frame structure used to support the entire device. The upright 12 is vertically fixed to the base 11 and can be a frame composed of profiles (such as I-beams, channel steel, etc.) used to fix the lifting mechanism. The support arms 21 are horizontally extending components, with their spacing designed to be smaller than the diameter of the tire to be supported, thus enabling them to be lifted onto the outer circumference of the lower half of the tire. The closer the spacing between the two support arms 21 is to the diameter of the tire, the more stable the tire will be when placed on the support arms 21. The lifting mechanism connects to the lifting assembly 2 and can take various forms, such as a screw-nut mechanism, hydraulic cylinder drive, or pneumatic cylinder drive. This mechanism allows the support arms 21 to move vertically up and down. The moving mechanism is used to move the entire device.

[0032] In this embodiment, the tire removal and installation auxiliary frame is used to move the frame near the tire to be removed (after the tire fixing bolts have been removed) via a moving mechanism, positioning the two support arms 21 below the tire 01 on both sides. The lifting mechanism adjusts the height of the support arms 21 to contact the bottom of the tire, lifting it to a certain height. The frame is then moved to transfer the tire 01 to the designated area. During this process, workers can assist in smoothly removing and transferring the tire from the vehicle. When installing the tire 01, it is first stably placed on the two support arms 21. Then, the moving mechanism moves the frame near the tire to be installed. The lifting mechanism adjusts the tire height to align the tire's connecting structure (e.g., bolt holes) with the corresponding connecting structure (e.g., bolts) on the vehicle. The frame is moved to initially install the tire on the vehicle (e.g., inserting bolts into the mounting holes). The frame is then removed to secure the tire (e.g., tightening the fixing bolts). During this process, staff can assist in ensuring the tires are smoothly installed onto the vehicle.

[0033] This embodiment of the automotive tire loading and unloading rack mechanizes tire handling, freeing operators from the arduous and dangerous task of manual lifting, effectively avoiding muscle strain and the risk of tires falling. Through the moving and lifting mechanisms, operators can easily and precisely control the height and position of the tires, improving loading and unloading efficiency and accuracy, and reducing impact damage to the tires and rims.

[0034] In this embodiment of the automotive tire auxiliary mounting and dismounting bracket, the lifting assembly 2 includes a bracket 22 and two support arms 21 fixedly disposed at the bottom of one side of the bracket 22; when the tire is placed on the two support arms 21, one side of the bracket 22 can abut against the end face of the tire.

[0035] In this embodiment, the bracket 22 can be a circular plate structure with two support arms 21 fixedly installed on one side of the bottom of the bracket 22. Alternatively, the bracket 22 can also be a U-shaped, horseshoe-shaped, or arc-shaped plate structure with the opening facing downwards, with two support arms 21 fixedly installed on one side of the bottom of the bracket 22. The shape and size of the bracket 22 can be designed and optimized according to the size and shape of the tire. The support arms 21 and the bracket 22 can be fixed by welding, bolting, or other methods. When the tire is supported by the support arms 21, the side face (tread) of the tire will naturally approach or abut against the side plane of the bracket 22. The bracket 22 acts as a backrest, enhancing the stability of the tire on the auxiliary mounting frame and preventing it from sliding or tilting in the horizontal direction. At the same time, it provides the operator with an intuitive visual reference, facilitating the quick and accurate positioning of the tire to the ideal working position.

[0036] The vehicle tire mounting and dismounting bracket of this embodiment further includes a buffer pad 23, which is disposed on one side of the bracket 22 and is used to abut against the end face of the tire when the tire is placed on the two support arms 21.

[0037] In this embodiment, the buffer pad 23 is made of an elastic material (such as rubber, polyurethane, etc.) and is attached to the side of the bracket 22 that contacts the tire. It can be bonded, bolted, or connected by other means. When lifting the tire, the tire end face contacts and is compressed by the buffer pad 23, utilizing the elastic deformation of the buffer pad 23 to absorb energy. This avoids direct hard contact between the rigid bracket 22 and the tire rubber surface (especially the sidewall), preventing scratches and wear on the tire.

[0038] The vehicle tire mounting and dismounting bracket of this embodiment, further, as shown in the example... Figure 3 As shown, the support arm 21 includes a support rod 211 and a support sleeve 212; there are two support rods 211, which are arranged in parallel opposite directions and are fixedly connected to the bottom of one side of the bracket 22 respectively; there are two support sleeves 212, which are rotatably sleeved on the two support rods 211 respectively.

[0039] In this embodiment, the support rod 211, which is rod-shaped, connects to the bottom of the fixed bracket 22. The support sleeve 212 is fitted onto the support rod 211 and can rotate. The support rod 211 and the bracket 22 can be connected by threads or welding. When it is necessary to fine-tune the angle of the tire on the support arm to align with the bolt holes (or bolts), the operator can easily rotate the tire. Because the support sleeve 212 is rotatable, the sliding friction between the tire and the support arm is greatly reduced, transforming it into more effortless rolling friction.

[0040] In one embodiment, the support rod 211 can be a long bolt, and the bracket 22 has a corresponding screw hole. The long bolt (support rod 211) is threadedly connected to the bracket 22. The inner diameter of the support sleeve 212 is larger than the outer diameter of the long bolt's screw and smaller than the outer diameter of the long bolt's head. The length of the long bolt screwed into the bracket 22 can be adjusted. When the screwing length is short (still secure and sufficient to support the tire), the support sleeve 212 can rotate freely; when the screwing length is long, the head of the long bolt can press against the end face of the support sleeve 212, preventing the support sleeve 212 from rotating. When the support sleeve 212 can rotate freely, if the tire is placed on the support sleeve and the tire angle needs to be finely adjusted, there is rolling friction between the tire and the support sleeve, resulting in low friction. The operator can easily push the tire to rotate, reducing alignment difficulty and improving installation efficiency. When the head of the long bolt presses against the end face of the support sleeve 212, restricting the rotation of the support sleeve, the support sleeve and the long bolt are relatively fixed. In this state, the tire is less likely to rotate unexpectedly due to external forces when placed on the support arm. Especially during the tire transfer process, it can prevent the tire from shaking or shifting, thus improving the support stability and operational safety.

[0041] In this embodiment of the automotive tire auxiliary mounting bracket, the outer circumferential surface of the support sleeve 212 is further provided with anti-slip texture.

[0042] In this embodiment, various textures, such as spiral patterns, grid patterns, or special concave-convex structures, are designed on the outer circumferential surface of the support sleeve 212. When the tire is placed on the support sleeve 212, the anti-slip texture increases the friction between the support sleeve 212 and the tire, thereby improving the stability of the tire on the support sleeve 212.

[0043] The vehicle tire mounting and dismounting bracket of this embodiment, further, as shown in the example... Figure 3 , 4 As shown, the support frame 12 has two mounting slots 120 opening towards the side of the lifting assembly 2. The two mounting slots 120 extend vertically and are arranged parallel to each other. The lifting mechanism includes lead screws 31, lifting seats 32, and a drive device. There are two lead screws 31, which are rotatably installed in the two mounting slots 120 respectively. There are two lifting seats 32, which are threadedly fitted onto the two lead screws 31 respectively. A portion of each lifting seat 32 is accommodated in the corresponding mounting slot 120, and the shape of this portion is adapted to the inner cavity shape of the mounting slot 120, so that the lifting seat 32 is constrained to move only in the vertical direction. The other portion of the lifting seat 32 extends out through the opening of the mounting slot 120 and is fixedly connected to the support frame 22. The drive device is connected to the two lead screws 31 through a transmission mechanism to drive the two lead screws 31 to rotate synchronously, thereby causing the two lifting seats 32 to rise and fall synchronously.

[0044] In this embodiment, two vertical slots can be machined on the support frame 12, and the shape of the slots can be designed as rectangles, etc. The lead screw 31 is arranged in the mounting slot 120. The two lead screws are arranged in parallel and driven to rotate by a drive device. The lifting seat 32 has internal threads that thread-fit with the lead screw 31. Part of it is located within the mounting slot 120 and is constrained by the mounting slot 120, allowing it to move only up and down but not rotate; the other part extends out of the mounting slot 120 and is fixedly connected to the bracket 22. The drive device can be a motor, a manual crank, etc., and is connected to the lead screw 31 via a transmission mechanism to drive the lead screw 31 to rotate. During operation, the drive device drives the lead screw 31 to rotate via the transmission mechanism. When the lead screw 31 rotates, because the lifting seat 32 is restricted by the mounting slot 120 and cannot rotate, it can only be forced to move linearly along the axial direction (i.e., the vertical direction) of the lead screw 31, thereby driving the support arm 21 to smoothly lift the tire via the bracket 22.

[0045] The vehicle tire mounting and dismounting bracket of this embodiment, further, as shown in the example... Figures 3-5As shown, the transmission mechanism includes a transmission box 33 fixed to the top of the support frame 12 and a gear transmission structure disposed inside the transmission box 33; the gear transmission structure includes a pair of first bevel gears 34, a pair of second bevel gears 36, a first helical gear 37, and a second helical gear 38; the pair of first bevel gears 34 are coaxially fixed at both ends of a horizontal shaft 35, which is rotatably supported inside the transmission box 33; the pair of second bevel gears 36 are respectively fixedly installed at the top ends of two lead screws 31 and mesh with the pair of first bevel gears 34 respectively; the first helical gear 37 is fixedly installed on the horizontal shaft 35; the second helical gear 38 is rotatably installed inside the transmission box 33 and meshes with the first helical gear 37.

[0046] In this embodiment, the transmission box 33 is fixed to the top of the support frame 12 and houses the gear transmission mechanism. A pair of first bevel gears 34 are mounted at both ends of the same horizontal shaft 35. The horizontal shaft 35 is located inside the transmission box 33, bearing the force of the first bevel gears 34 and providing rotational support. Second bevel gears 36 are respectively mounted on the tops of two lead screws 31 and mesh with the first bevel gears 34. A first helical gear 37 is located on the horizontal shaft 35 and meshes with the second helical gear 38. The second helical gear 38 is connected to the drive device and is used to transmit the power of the drive device. The drive device drives the second helical gear 38 to rotate, the second helical gear 38 drives the first helical gear 37 to rotate, which in turn drives the horizontal shaft 35 to rotate. The horizontal shaft 35 drives the first bevel gears 34 at both ends to rotate, the first bevel gears 34 drive the second bevel gears 36 meshing with them to rotate, and the second bevel gears 36 drive the lead screws 31 to rotate. The two lead screws 31 rotate synchronously, driving the lifting seat 32 to rise and fall synchronously.

[0047] In this embodiment of the automotive tire auxiliary mounting and dismounting bracket, the driving device is a hand crank 39, which is rotatably mounted on the transmission box 33 and connected to the second helical gear 38, and is configured to drive the second helical gear 38 to rotate.

[0048] In this embodiment, the hand crank 39 is located outside the transmission box 33 and is fixedly connected to the second helical gear 38. Rotating the hand crank 39 drives the second helical gear 38 to rotate, which in turn drives the first helical gear 37 to rotate, thereby powering the entire transmission mechanism. Using the hand crank for power makes operation simple and convenient, requires no additional power supply, has a simple structure, and is easy to maintain.

[0049] The automotive tire mounting bracket in this embodiment achieves a self-locking function by designing the lead angle of the lead screw. This means that when the hand crank is not subjected to external force, the load cannot reverse the drive of the lead screw, thus ensuring that the system remains stationary when there is no external force. Therefore, the lead screw can drive the lifting seat to move, but the lifting seat cannot reverse the drive of the lead screw to move, which effectively prevents the lifting seat from moving unexpectedly when the hand crank is stopped.

[0050] The vehicle tire mounting and dismounting bracket of this embodiment, further, as shown in the example... Figure 2 As shown, the moving mechanism includes four casters 13 disposed at the bottom of the base 11.

[0051] In this embodiment, four casters 13 are mounted on the bottom of the base 11. These casters can rotate in all directions. The casters 13 allow the entire device to move easily on the ground, improving ease of operation.

[0052] The vehicle tire mounting and dismounting bracket of this embodiment, further, as shown in the example... Figure 2 As shown, it also includes handrails 14 disposed on both sides of the top of the support frame 12.

[0053] In this embodiment, the handrails 14 are located on both sides of the top of the upright 12. During use, the handrails 14 can be grabbed for easy movement.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this innovative technical solution.

Claims

1. A car tire auxiliary mounting and dismounting frame, characterized in that, include: The base frame (1) includes a base (11) and a stand (12) disposed on the top of the base (11), and a moving mechanism is provided at the bottom of the base (11); The lifting assembly (2) has two horizontally spaced support arms (21) for supporting the tire from both sides; the lifting assembly (2) includes a bracket (22) and two support arms (21) fixedly disposed at the bottom of one side of the bracket (22); when the tire is placed on the two support arms (21), one side of the bracket (22) can abut against the end face of the tire; the support arm (21) includes a support rod (211) and a support sleeve (212); there are two support rods (211), which are arranged in parallel opposite directions and are fixedly connected to the bottom of one side of the bracket (22); there are two support sleeves (212), which are rotatably sleeved on the two support rods (211); A lifting mechanism is provided on the base frame (1) and is connected to the lifting assembly (2) to drive the two lifting arms (21) to reciprocate synchronously in the vertical direction; the upright frame (12) has two mounting slots (120) with openings facing the lifting assembly (2), the two mounting slots (120) extend vertically and are arranged in parallel intervals; the lifting mechanism includes a lead screw (31), a lifting seat (32) and a driving device; there are two lead screws (31), which are rotatably installed in the two mounting slots (120); the lifting seat (32) There are two lifting seats (32), which are respectively threaded onto the two lead screws (31); a portion of each lifting seat (32) is housed in the corresponding mounting groove (120), and the shape of this portion is adapted to the inner cavity shape of the mounting groove (120), so that the lifting seat (32) is constrained to move only in the vertical direction; another portion of the lifting seat (32) extends out through the opening of the mounting groove (120) and is fixedly connected to the bracket (22); the driving device is connected to the two lead screws (31) through a transmission mechanism, and is used to drive the two lead screws (31) to move together. The two lifting seats (32) are rotated in a step, thereby raising and lowering them synchronously; the transmission mechanism includes a transmission box (33) fixed to the top of the upright (12) and a gear transmission structure disposed inside the transmission box (33); the gear transmission structure includes a pair of first bevel gears (34), a pair of second bevel gears (36), a first helical gear (37), and a second helical gear (38); the pair of first bevel gears (34) are coaxially fixed at both ends of a horizontal shaft (35), the horizontal shaft (35) being rotatably supported inside the transmission box (33); the pair of second bevel gears (36) are coaxially fixed at both ends of a horizontal shaft (35), the horizontal shaft (35) being rotatably supported inside the transmission box (33); the pair of second bevel gears (36) are coaxially fixed to the top of the upright (12) and a gear transmission structure disposed inside the transmission box (33); the pair of second bevel gears (36) are coaxially fixed to the top of the upright (12) and a gear transmission structure disposed inside the transmission box (33); the gear transmission structure includes a pair of first bevel gears (34), a pair of second bevel gears (36), a pair of second bevel gears (37), a pair of second bevel gears (38), a pair of second bevel gears (39 ... 36) The first spiral gear (37) is fixedly installed on the top of the two lead screws (31) respectively and meshes with the pair of first bevel gears (34); the first spiral gear (37) is fixedly installed on the horizontal shaft (35); the second spiral gear (38) is rotatably installed in the transmission box (33) and meshes with the first spiral gear (37); the driving device is a hand crank (39), which is rotatably disposed on the transmission box (33) and connected to the second spiral gear (38), and is configured to drive the second spiral gear (38) to rotate.

2. The automotive tire auxiliary mounting and dismounting frame according to claim 1, characterized in that, Also includes: A buffer pad (23) is provided on one side of the bracket (22) for engaging with the end face of the tire when the tire is placed on the two support arms (21).

3. The automotive tire auxiliary mounting and dismounting frame according to claim 1, characterized in that, The outer circumferential surface of the support sleeve (212) is formed with anti-slip texture.

4. The automotive tire auxiliary mounting and dismounting frame according to claim 1, characterized in that, The moving mechanism includes four casters (13) located at the bottom of the base (11).

5. The automotive tire auxiliary mounting and dismounting frame according to claim 1, characterized in that, It also includes handrails (14) located on both sides of the top of the support frame (12).

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