Axle distance adjustment mechanism and lifting device comprising same

Abstract

The application provides a wheelbase adjusting mechanism and a lifting device comprising the same, the wheelbase adjusting mechanism comprising a wheel carrying unit for carrying vehicle wheels and a guide unit, the guide unit comprising a matched bevel gear and a sliding groove, the bevel gear being arranged on the wheel carrying unit, the sliding groove extending along the driving direction of the vehicle, and the bevel gear being matched with the sliding groove in shape to guide the position adjustment of the wheel carrying unit along the driving direction of the vehicle. The guide unit can guide the moving direction of the wheel carrying unit, ensure the accuracy of the moving direction of the wheel carrying unit, and improve the smoothness of the movement of the wheel carrying unit. The outer peripheral slope of the bevel gear and the inner surface of the slot of the sliding groove are matched to limit the one-side displacement of the wheel carrying unit in the width direction of the vehicle. The electric vehicle will not be offset in the width direction of the vehicle, so that the battery replacement equipment can be accurately aligned with the electric vehicle, and the success rate and efficiency of the battery replacement are improved.

Description

Technical Field

[0001] This invention relates to the field of battery swapping for electric vehicles, and particularly to a wheelbase adjustment mechanism and a lifting device including the same. Background Technology

[0002] Electric vehicles are becoming increasingly popular with consumers. Since they primarily use electricity, they need to be recharged when the battery is depleted. However, due to current limitations in battery and charging technology, fully charging an electric vehicle takes a considerable amount of time, unlike the quick and easy process of refueling a gasoline car. Therefore, replacing the battery when the electric vehicle's power is nearly exhausted is an effective way to reduce user waiting time.

[0003] To facilitate battery replacement for electric vehicles and meet their battery swapping needs, battery swapping stations need to be built. This allows electric vehicles with depleted battery packs to drive into the station for a swap. The swapping stations are equipped with lifting devices to elevate the electric vehicle during the swapping process, enabling the swapping equipment to operate underneath the vehicle for the swap.

[0004] Existing battery swapping equipment typically moves only in the width direction of the vehicle to move between the swapping compartment and the charging compartment of the swapping station to replace the battery pack. For ease of operation, the swapping equipment is usually moved to a fixed position before the swapping operation begins. However, due to the different wheelbases between the front and rear wheels of different electric vehicle models, it is difficult for the electric vehicle to be perfectly aligned with the swapping equipment after parking. This results in the electric vehicle not being able to park precisely above the swapping equipment, leading to swapping failures or repeated swapping operations.

[0005] To address the aforementioned issues, existing technology discloses a wheelbase adjustment mechanism to adjust the position of an electric vehicle in the vehicle's travel direction, thereby improving battery swapping efficiency. This wheelbase adjustment mechanism includes a guide unit for guiding the wheel-bearing unit carrying the electric vehicle to move along the vehicle's travel direction to accommodate vehicles with different wheelbases. Traditional guide units typically employ a combination of cylindrical pulleys and grooves. However, to ensure smooth sliding, the pulleys and grooves are not completely locked together in the vehicle's width direction. This results in relative movement between the pulleys and grooves in the vehicle's width direction, causing displacement of the electric vehicle in this direction and leading to battery swapping failure. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art in which cylindrical pulleys and grooves are used as guide units in the wheelbase adjustment mechanism. Since the pulleys and grooves are not completely locked, the pulleys and grooves will move relative to each other in the vehicle width direction during the wheelbase adjustment process, which reduces the smoothness of sliding and causes the electric vehicle to be displaced in the vehicle width direction, resulting in battery swapping failure. The present invention provides a wheelbase adjustment mechanism and a lifting device including the present invention.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A wheelbase adjustment mechanism, the wheelbase adjustment mechanism comprising:

[0009] Wheel support unit, used to support the wheels of a vehicle;

[0010] The guide unit includes a matching conical wheel and a groove. The conical wheel is rotatably connected to the wheel-bearing unit, and the groove extends along the vehicle's travel direction. The shape of the conical wheel matches that of the groove to guide the wheel-bearing unit to adjust its position along the vehicle's travel direction.

[0011] In this solution, the guide unit can guide the movement direction of the wheel-bearing unit, ensuring the accuracy of the movement direction of the wheel-bearing unit and improving the smoothness of the movement of the wheel-bearing unit along the vehicle's driving direction. The outer peripheral inclined surface of the cone wheel and the inner surface of the groove can restrict the unilateral displacement of the wheel-bearing unit in the vehicle width direction, thereby ensuring that when the electric vehicle is parked on the wheel-bearing unit after the wheelbase adjustment is completed, the electric vehicle will not deviate in the vehicle width direction, so that the battery swapping equipment can be accurately aligned with the electric vehicle, improving the battery swapping success rate and battery swapping efficiency.

[0012] Preferably, the guide units are arranged in pairs on both sides of the wheel-bearing unit along the vehicle's direction of travel.

[0013] In this solution, a guide unit matching a conical wheel and a groove is set on each side of the wheel bearing unit to achieve double-sided limiting of the wheel bearing unit in the vehicle width direction, further preventing the electric vehicle from shifting along the vehicle width direction, so that the battery swapping equipment can be accurately aligned with the electric vehicle, improving the battery swapping success rate and battery swapping efficiency.

[0014] Preferably, the guide unit includes a groove and two pairs of fixed shafts and conical wheels that are arranged in a one-to-one correspondence, with the two pairs of fixed shafts and conical wheels arranged at intervals along the vehicle travel direction.

[0015] In this solution, by setting a pair of fixed shafts and conical wheels on each side of the wheel bearing unit's movement direction, two pairs of fixed shafts and conical wheels are provided on each side of the wheel bearing unit. This allows them to cooperate with the slide groove, providing more support points for the wheel bearing unit and forming multi-point support. This makes the wheel bearing unit more stable and less prone to overturning when carrying the wheel.

[0016] Preferably, the guide unit further includes a fixed shaft, the conical wheel is sleeved on the fixed shaft and rotatably connected to the fixed shaft, the conical wheel can rotate along its own axis, the fixed shaft is connected to the wheel bearing unit through a position adjustment structure, the position adjustment structure is used to adjust the distance between the conical wheel and the wheel bearing unit in the direction of the fixed shaft axis, so that the conical wheel is located in the groove of the slide and can reciprocate along the extension direction of the slide.

[0017] In this solution, when there are machining or installation errors in the wheelbase adjustment mechanism, the outer circumferential inclined surface of the conical wheel may not match the groove opening, causing the conical wheel to easily get stuck in the groove, resulting in poor wheelbase adjustment. This solution uses a position adjustment structure to adjust the distance between the conical wheel and the wheel bearing unit, thereby adjusting the distance between the conical wheel and the groove, allowing the conical wheel and the groove to better match and ensuring smooth adjustment of the wheelbase adjustment mechanism.

[0018] Preferably, the fixed shaft has a boss along the axis of the conical wheel, the boss abutting against a first side of the conical wheel, and the boss is used to restrict the movement of the conical wheel in the axis of the fixed shaft.

[0019] In this design, the boss is used to restrict the movement of the conical wheel toward one side in the direction of the fixed shaft axis, thereby improving the stability of the conical wheel guidance, simplifying the structure of the guide unit, and reducing costs.

[0020] Preferably, the guide unit further includes a first limiting structure, with the conical wheel sandwiched between the boss and the first limiting structure, the first limiting structure being used to restrict the movement of the conical wheel in the direction of the fixed shaft axis.

[0021] In this design, the first limiting structure and the boss are used to restrict the movement of the cone wheel in both directions along the axis of the fixed shaft, prevent the cone wheel from detaching from the fixed shaft, and improve the stability of the cone wheel guide.

[0022] Preferably, the first limiting structure includes a first limiting member and a limiting groove disposed on the outer peripheral surface of the fixed shaft, wherein the first limiting member is connected to the fixed shaft and is partially located within the limiting groove.

[0023] In this design, the limiting groove can restrict the movement of the first limiting member in the direction of the fixed shaft axis and play a fixing role, which facilitates the installation and positioning of the first limiting member.

[0024] Preferably, the first limiting member is a retaining ring, the limiting groove is arranged circumferentially around the fixed shaft, and the retaining ring is sleeved on the fixed shaft and engaged in the limiting groove.

[0025] In this solution, the snap ring structure is simple and is existing technology. Therefore, technicians do not need to make special designs for the first limiting component. The conical wheel can be limited by using existing materials, thus reducing costs.

[0026] Preferably, along the axis of the fixed shaft, there is a gap between the second side of the conical wheel and the end face of the first limiting member near the conical wheel.

[0027] In this design, the first side of the cone wheel abuts against the boss, and the second side of the cone wheel is spaced apart from the first limiting member to ensure smooth rotation of the cone wheel.

[0028] Preferably, the guide unit further includes a bushing, and the conical wheel is rotatably connected to the fixed shaft through the bushing.

[0029] In this design, the frictional force of the conical wheel rotating relative to the fixed shaft is reduced by using a bushing.

[0030] Preferably, the fixed shaft and the wheel bearing unit are detachably connected via the position adjustment structure.

[0031] In this solution, if either the fixed shaft or the conical wheel is damaged, the above-mentioned arrangement facilitates the disassembly and assembly of the fixed shaft and the wheel bearing unit. Only the damaged structure needs to be replaced, without replacing the entire unit, thus reducing maintenance costs.

[0032] Preferably, the wheel bearing unit includes a mounting bracket, and the position adjustment structure includes a threaded hole with internal threads opened on the mounting bracket and an external thread provided on the fixed shaft. The fixed shaft is detachably connected to the mounting bracket through the engagement of the external thread and the internal thread.

[0033] In this solution, the position adjustment of the fixed shaft and the mounting bracket is achieved through the meshing thread, thereby adjusting the distance between the conical wheel and the mounting bracket, which in turn allows for better engagement between the conical wheel and the slide groove, ensuring the smooth adjustment of the wheelbase adjustment mechanism.

[0034] Preferably, the mounting bracket includes a mounting bracket body and an adapter bracket connected to each other. The mounting bracket body has an upward-facing receiving groove for carrying a wheel, and the threaded hole is formed on the adapter bracket.

[0035] In this solution, the above-mentioned arrangement effectively avoids interference between the fixed axle and the wheel supported on the wheel bearing unit, and facilitates the position adjustment of the fixed axle and the adapter.

[0036] Preferably, the guide unit further includes a second limiting structure disposed on the adapter frame, the second limiting structure being used to restrict the fixed shaft from rotating along its own axis.

[0037] In this solution, since the conical wheel may drive the fixed shaft to rotate during rotation, and the fixed shaft is threadedly connected to the adapter, if the fixed shaft rotates, it may cause the distance between the conical wheel and the slide groove to increase or decrease, thereby causing the conical wheel to disengage from the slide groove or interfere with the slide groove. The second limiting structure is used to limit the rotation of the fixed shaft, thereby preventing the aforementioned problems and ensuring the smoothness of the wheelbase adjustment.

[0038] Preferably, the second limiting structure includes:

[0039] The second limiting hole is formed on the outer peripheral surface of the fixed shaft;

[0040] The second limiting member passes through the second limiting hole;

[0041] A locking hole is provided on the adapter, and the second limiting member passes through the locking hole.

[0042] In this design, when the fixed shaft rotates, it will cause the second limiting member to rotate. At this time, the inner wall of the locking hole blocks the rotation of the second limiting member, thereby limiting the rotation of the fixed shaft.

[0043] Preferably, the second limiting structure includes:

[0044] The second limiting hole is formed on the outer peripheral surface of the fixed shaft;

[0045] The second limiting member passes through the second limiting hole;

[0046] A locking part is provided on the adapter frame, and the locking part has a receiving area for the fixed shaft to pass through and a locking hole for the second limiting member to pass through.

[0047] In this design, when the fixed shaft rotates, it will cause the second limiting member to rotate. At this time, the inner wall of the locking hole of the locking part blocks the rotation of the second limiting member, thereby limiting the rotation of the fixed shaft.

[0048] Preferably, the locking part is a straight cylinder, and the inner surface of the straight cylinder matches the shape of the outer peripheral surface of the fixed shaft.

[0049] In this design, the straight cylinder can provide a certain guiding function for the fixed shaft.

[0050] Preferably, there are multiple second limiting holes, which are spaced apart along the circumferential direction of the fixed axis, and at least one second limiting hole is provided with a second limiting member.

[0051] In this solution, depending on the required distance between the conical wheel and the adapter, the second limiting member can be inserted into the locking hole and the corresponding second limiting hole to achieve stepped adjustment of the conical wheel position and increase the flexibility of the conical wheel position adjustment.

[0052] Preferably, there are multiple locking holes, which are spaced apart along the circumferential direction of the fixed axis, and the second limiting member is inserted into each locking hole.

[0053] In this solution, the above settings can lock the fixed shaft at multiple points, further preventing the fixed shaft from rotating and improving the locking effect.

[0054] Preferably, the second limiting hole is a threaded hole, and the second limiting member is a set screw.

[0055] In this solution, the threaded connection is convenient and efficient.

[0056] Preferably, the locking part is located on the end face of the adapter away from the conical wheel.

[0057] In this design, the above-mentioned arrangement ensures that the locking part and the cone wheel will not interfere with each other.

[0058] Preferably, the adapter frame includes:

[0059] A horizontally arranged top plate is mounted on the mounting frame body;

[0060] A vertical adapter plate is provided at each end of the top plate along the width direction of the vehicle. The two vertical adapter plates and the top plate form an inverted U-shaped structure with the opening facing downwards. The threaded hole is opened on the vertical adapter plate.

[0061] In this design, the above-mentioned arrangement facilitates the installation and removal of the fixed shaft from below.

[0062] Preferably, along the axis of the fixed shaft, at least one end face of the fixed shaft is provided with a disassembly / reassembly groove that mates with a disassembly / reassembly tool.

[0063] In this design, the above-mentioned setup facilitates the installation and disassembly of the fixed shaft and the adapter.

[0064] A lifting device includes a frame, a drive mechanism, and a wheelbase adjustment mechanism as described above. The drive mechanism is disposed on the frame and connected to the wheelbase adjustment mechanism. The drive mechanism is used to drive the wheelbase adjustment mechanism to move along the vehicle's travel direction.

[0065] In this solution, the drive mechanism drives the wheelbase adjustment mechanism to move along the vehicle's travel direction, which in turn drives the wheel-bearing unit to move along the vehicle's travel direction, thereby achieving wheelbase adjustment to match vehicles with different wheelbases.

[0066] The positive and progressive effects of this invention are as follows:

[0067] The guide unit can guide the movement direction of the wheel-bearing unit, ensuring the accuracy of the movement direction of the wheel-bearing unit and improving the smoothness of the movement of the wheel-bearing unit along the vehicle's driving direction. The outer peripheral inclined surface of the cone wheel and the inner surface of the groove can restrict the unilateral displacement of the wheel-bearing unit in the vehicle width direction, thereby ensuring that when the electric vehicle is parked on the wheel-bearing unit after the wheelbase adjustment is completed, the electric vehicle will not deviate in the vehicle width direction, so that the battery swapping equipment can be accurately aligned with the electric vehicle, improving the battery swapping success rate and battery swapping efficiency. Attached Figure Description

[0068] Figure 1 This is a three-dimensional structural diagram of a lifting device according to an embodiment of the present invention.

[0069] Figure 2 This is another three-dimensional structural schematic diagram of a lifting device according to an embodiment of the present invention.

[0070] Figure 3 This is a three-dimensional structural schematic diagram of a wheelbase adjustment mechanism according to an embodiment of the present invention.

[0071] Figure 4 This is a three-dimensional structural schematic diagram of a wheelbase adjustment mechanism according to an embodiment of the present invention.

[0072] Figure 5 This is a side view of a wheelbase adjustment mechanism according to an embodiment of the present invention.

[0073] Figure 6 for Figure 5 Enlarged view of part A in the image.

[0074] Figure 7 This is a three-dimensional structural diagram of the wheel bearing unit and the conical wheel mating point according to an embodiment of the present invention.

[0075] Figure 8 This is a schematic diagram of the internal structure of the wheel bearing unit and the conical wheel mating point according to an embodiment of the present invention.

[0076] Figure 9 for Figure 8 Enlarged view of part B in the image.

[0077] Figure 10 This is a three-dimensional structural diagram of the conical wheel and the fixed shaft according to an embodiment of the present invention.

[0078] Figure 11 This is a three-dimensional structural diagram of a mounting bracket according to an embodiment of the present invention.

[0079] Figure 12 This is a schematic diagram of the internal structure of a wheelbase adjustment mechanism according to an embodiment of the present invention.

[0080] Figure 13 for Figure 12 Enlarged view of section C in the image.

[0081] Figure 14 This is a side view of the adapter frame according to an embodiment of the present invention.

[0082] Figure 15 This is a schematic diagram of the internal structure of the conical wheel and the fixed shaft in an embodiment of the present invention.

[0083] Figure 16 This is a schematic diagram of another three-dimensional structure of the conical wheel and the fixed shaft in one embodiment of the present invention.

[0084] Explanation of reference numerals in the attached figures:

[0085] Wheelbase adjustment mechanism 11; drive mechanism 12; frame body 13; wheel bearing unit 2; mounting bracket 21; threaded hole 211; mounting bracket body 212; receiving groove 2121; adapter bracket 213; top plate 2131; vertical adapter plate 2132; guide unit 3; conical wheel 31; sliding groove 32; fixed shaft 33; boss 331; disassembly groove 332; second limiting hole 41; second limiting member 42; locking part 43; receiving area 431; locking hole 432; first limiting member 51; limiting groove 52; bushing 6. Detailed Implementation

[0086] Several preferred embodiments are described below, and the invention will be explained more clearly and completely in conjunction with the accompanying drawings.

[0087]

Example 1

[0088] like Figures 1-4 As shown, this embodiment provides a wheelbase adjustment mechanism 11, applied in a lifting device within a battery swapping station. The battery swapping station has two lifting devices. When an electric vehicle enters the station, its front wheels rest on the lifting device equipped with the wheelbase adjustment mechanism 11, while its rear wheels rest on the other lifting devices. The lifting device with the wheelbase adjustment mechanism 11 and the other lifting devices can cooperate to lift the vehicle. Specifically, the wheelbase adjustment mechanism 11 adjusts the wheel bearing unit along the vehicle's travel direction before the electric vehicle enters the station. Figure 1The wheelbase adjustment mechanism 11 is adjusted to a suitable position in the X direction to accommodate electric vehicles with different wheelbases. This ensures that after the electric vehicle is parked on the lifting device, it can be parked directly above the battery swapping equipment, guaranteeing a high success rate and efficiency in battery swapping. In other alternative embodiments, the wheelbase adjustment mechanism 11 can be located on the lifting device at the rear wheels of the vehicle.

[0089] like Figures 3-7 As shown, the wheelbase adjustment mechanism 11 includes a wheel bearing unit 2 and a guide unit 3. The wheel bearing unit 2 is used to bear the wheels of the vehicle, and the guide unit 3 is used to guide the movement direction of the wheel bearing unit 2.

[0090] like Figures 3-7 As shown, the guide unit 3 includes a matching conical wheel 31 and a groove 32. The conical wheel 31 is rotatably connected to the wheel bearing unit 2, and the groove 32 extends along the vehicle travel direction. The shape of the conical wheel 31 matches that of the groove 32 to guide the wheel bearing unit 2 to adjust its position along the vehicle travel direction.

[0091] Specifically, such as Figures 2-5 As shown, along the vehicle's travel direction, guide units 3 are arranged in pairs on both sides of the wheel-bearing unit 2. Each guide unit 3 includes a groove 32 and two pairs of corresponding fixed shafts 33 and conical wheels 31. The openings of the two grooves 32 are opposite to each other, and the conical wheels 31 are disposed in the grooves 32 on the corresponding side. By providing a guide unit 3 with a conical wheel 31 matching the groove 32 on each side of the wheel-bearing unit 2, the wheel-bearing unit 2 can achieve [property management] in the vehicle width direction (…). Figure 1 The double-sided limiters in the Y direction prevent electric vehicles from shifting along the width of the vehicle, allowing the battery swapping equipment to be accurately aligned with the electric vehicle, thus improving the success rate and efficiency of battery swapping.

[0092] Specifically, with Figure 5 Taking the direction shown as an example, when the wheel bearing unit 2 displaces to the left in the vehicle width direction, the left groove 32 restricts the left cone wheel 31 from extending, thus preventing the right cone wheel 31 from disengaging from the right groove 32. When the wheel bearing unit 2 displaces to the right in the vehicle width direction, the right groove 32 restricts the right cone wheel 31 from extending, thus preventing the left cone wheel 31 from disengaging from the left groove 32, preventing the cone wheel 31 from jamming with the groove 32, and ensuring the smoothness of wheelbase adjustment.

[0093] like Figure 4 and Figure 7As shown, two pairs of fixed shafts 33 and conical wheels 31 in the same guide unit 3 are arranged at intervals along the vehicle's travel direction. The conical wheels 31 are rotatably mounted on the wheel-bearing unit 2 via the fixed shafts 33. By setting a pair of fixed shafts 33 and conical wheels 31 on each side of the wheel-bearing unit 2 in the direction of movement, two pairs of fixed shafts 33 and conical wheels 31 are provided on each side of the wheel-bearing unit 2, which cooperate with the slide groove 32 to provide more support points for the wheel-bearing unit 2, forming multi-point support, making the wheel-bearing unit 2 more stable and less prone to tipping over when carrying the wheel.

[0094] In other alternative implementations, each guide unit 3 may include more pairs of fixed shafts 33 and conical wheels 31, with multiple pairs of fixed shafts 33 and conical wheels 31 arranged at intervals along the vehicle's travel direction, which further improves the stability of the wheel-bearing unit.

[0095] by Figure 6 The diagram illustrates the fitting relationship between the conical wheel 31 and the groove 32. The conical wheel 31 is housed within the groove 32, and its outer circumferential surface mates with the upper and lower inclined inner surfaces of the groove 32. The conical wheel 31 can rotate normally within the groove 32. Along the axial direction of the conical wheel 31, from the end of the conical wheel 31 closest to the opening of the groove 32 to the end of the conical wheel 31 furthest from the opening, the diameter of the conical wheel 31 gradually decreases, and the width of the groove 32 gradually decreases (i.e.,...). Figure 6 The diameter of the conical wheel 31 gradually decreases from right to left, and the width of the groove 32 gradually decreases from right to left.

[0096] Since the chute 32 extends along the vehicle's driving direction, the wheel support unit 2 moves along the vehicle's driving direction through the cooperation of the conical wheel 31 and the chute 32, ensuring the accuracy of the wheel support unit 2's movement direction. Furthermore, the cooperation of the conical wheel 31 on both sides of the wheel support unit 2 with the chute 32 can limit the lateral displacement of the wheel support unit 2 in the vehicle's width direction. This ensures that when the electric vehicle is parked on the wheel support unit after the wheelbase adjustment is completed, the electric vehicle will not deviate in the vehicle's width direction, allowing the battery swapping equipment to accurately align with the electric vehicle, thereby improving the battery swapping success rate and efficiency.

[0097]

Example 2

[0098] This embodiment discloses another wheelbase adjustment mechanism. Embodiment 2 is based on Embodiment 1, such as... Figures 7-10 As shown, in Embodiment 2, the conical wheel 31 is sleeved on the fixed shaft 33 and rotatably connected to the fixed shaft 33. The conical wheel 31 can rotate along its own axis. The fixed shaft 33 is connected to the wheel bearing unit 2 through a position adjustment structure. The position adjustment structure is used to adjust the distance between the conical wheel 31 and the wheel bearing unit 2 in the axial direction of the fixed shaft 33 so that the conical wheel 31 is located in the groove of the slide groove 32 and can reciprocate along the extension direction of the slide groove 32.

[0099] When there are machining or installation errors in the wheelbase adjustment mechanism 11, the outer peripheral inclined surface of the cone wheel 31 may not match the groove of the slide 32, causing the cone wheel 31 to easily get stuck in the slide 32, resulting in poor wheelbase adjustment. This embodiment addresses this by setting a position adjustment structure to adjust the distance between the cone wheel 31 and the wheel bearing unit 2, thereby adjusting the distance between the cone wheel 31 and the slide 32. This allows the cone wheel 31 and the slide 32 to better cooperate, ensuring smooth adjustment of the wheelbase adjustment mechanism 11.

[0100] In this embodiment, the fixed shaft 33 and the wheel bearing unit 2 are detachably connected through a position adjustment structure. Therefore, if either the fixed shaft 33 or the conical wheel 31 is damaged, it is convenient to disassemble and assemble the fixed shaft 33 and the wheel bearing unit 2. Only the damaged structure needs to be replaced, instead of replacing the whole unit, thus reducing maintenance costs.

[0101] Specifically, such as Figure 3 , Figure 8 , Figure 9 and Figure 11 As shown, the wheel bearing unit 2 includes a mounting frame 21, which includes a mounting frame body 212 and an adapter frame 213 connected to each other. The mounting frame body 212 has an upward-facing receiving groove 2121 for bearing the wheel, and the adapter frame 213 is installed at the lower end of the mounting frame body 212.

[0102] like Figure 11 and Figure 14 As shown, the adapter frame 213 includes a top plate 2131 and a vertical adapter plate 2132. The top plate 2131 is horizontally arranged and mounted on the mounting frame body 212. Along the vehicle width direction, a vertical adapter plate 2132 is provided at each end of the top plate 2131. The two vertical adapter plates 2132 and the top plate 2131 form an inverted U-shaped structure with the opening facing downward.

[0103] The position adjustment structure includes a threaded hole 211 with internal threads on the adapter 213 of the mounting bracket 21 and an external thread on the fixed shaft 33. The fixed shaft 33 is detachably connected to the adapter 213 through the engagement of the external thread and the internal thread. Specifically, the threaded hole 211 for connecting the fixed shaft 33 is provided on the vertical adapter plate 2132, which facilitates the installation and removal of the fixed shaft 33 from below, avoids interference between the fixed shaft 33 and the wheel supported on the wheel bearing unit 2, and facilitates the position adjustment of the fixed shaft 33 and the adapter 213.

[0104] In this embodiment, the position adjustment of the fixed shaft 33 and the mounting bracket 21 is achieved through the meshing thread engagement. By adjusting the thread engagement length of the two, the distance between the conical wheel 31 and the mounting bracket 21 is adjusted, that is, the distance between the conical wheel 31 and the slide groove 32 is adjusted, so that the conical wheel 31 and the slide groove 32 can better cooperate, the conical wheel 31 and the slide groove 32 maintain the correct contact surface, and ensure the smooth adjustment of the wheelbase adjustment mechanism 11.

[0105] Since the conical wheel 31 may cause the fixed shaft 33 to rotate during rotation, and the fixed shaft 33 is threadedly connected to the adapter 213, if the fixed shaft 33 rotates, it may cause the distance between the conical wheel 31 and the slide groove 32 to increase or decrease, thereby causing the conical wheel 31 to disengage from the slide groove 32 or interfere with the slide groove 32. Therefore, if Figure 11 As shown, the guide unit 3 also includes a second limiting structure disposed on the adapter 213. The second limiting structure is used to restrict the fixed shaft 33 from rotating along its own axis, thereby preventing the aforementioned problems and ensuring the smoothness of the wheelbase adjustment.

[0106] like Figures 10-13 As shown, the second limiting structure includes a second limiting hole 41, a second limiting member 42, and a locking part 43. The locking part 43 is located on the end face of the adapter 213 away from the conical wheel 31, ensuring that the locking part 43 and the conical wheel 31 do not interfere with each other. The second limiting hole 41 is opened on the outer peripheral surface of the fixed shaft 33, and the second limiting member 42 passes through the second limiting hole 41. The locking part 43 is located on the adapter 213 and has a receiving area 431 for the fixed shaft 33 to pass through and a locking hole 432 for the second limiting member 42 to pass through. When the fixed shaft 33 rotates, it will drive the second limiting member 42 to rotate. At this time, the inner wall of the locking hole 432 of the locking part 43 can block the rotation of the second limiting member 42, thereby limiting the rotation of the fixed shaft 33, ensuring the stability of the connection between the fixed shaft 33 and the adapter 213, preventing the conical wheel 31 from disengaging from or interfering with the slide groove 32, and ensuring smooth sliding.

[0107] In other alternative embodiments, the locking part may be omitted, and the locking hole may be directly set on the adapter 213, which can also prevent the fixed shaft from rotating. This will not be elaborated here.

[0108] like Figure 11 As shown, in this embodiment, the locking part 43 is a straight cylinder. The inner surface of the straight cylinder matches the shape of the outer peripheral surface of the fixed shaft 33. The fixed shaft 33 can extend into the interior of the straight cylinder, and the straight cylinder can play a certain guiding role for the fixed shaft.

[0109] Because the required distance between the conical wheel 31 and the adapter 213 is different, that is, the thread engagement length of the fixed shaft 33 and the adapter 213 is different, the second limiting hole 41 that aligns with the locking hole 432 will also be different. Therefore, as Figure 10As shown, there are multiple second limiting holes 41, which are evenly spaced along the circumferential direction of the fixed shaft 33. At least one second limiting hole 41 is fitted with a second limiting member 42. Specifically, in this embodiment, there are four second limiting holes 41 on the fixed shaft 33, with a second limiting member 42 inserted into one of them. In this embodiment, depending on the required distance between the conical wheel 31 and the adapter 213, the second limiting member 42 can be inserted into the locking hole 432 and the corresponding second limiting hole 41 to achieve stepped adjustment of the conical wheel position, thereby increasing the flexibility of the conical wheel 31 position adjustment. If it is necessary to adjust the distance between the conical wheel 31 and the adapter 213, the fixed shaft 33 can be rotated so that the other second limiting hole and the locking hole 432 are both fitted with the same second limiting member 42, thereby achieving the function of preventing the fixed shaft from rotating.

[0110] Even better, such as Figure 11 As shown, there are multiple locking holes 432, which are evenly spaced along the circumferential direction of the fixed shaft 33, and a second limiting member 42 is inserted into each locking hole 432. Specifically, in this embodiment, there are two locking holes 432, which correspond to two of the four second limiting holes 41 and are inserted through the second limiting member 42, thereby locking can be performed at multiple points on the fixed shaft 33, further preventing the fixed shaft 33 from rotating and improving the locking effect.

[0111] In other alternative embodiments, the number of second limiting holes 41 can be other numbers, such as two, three, five or even more, and the number of locking holes 432 can also be other numbers, such as two, three, five or even more. The locking holes 432 can be partially or fully inserted into the second limiting member 42 to improve the limiting effect. It can be set according to the actual situation, and will not be elaborated here.

[0112] In this embodiment, the second limiting hole 41 is a threaded hole, and the second limiting member 42 is a set screw. The threaded connection is convenient and efficient.

[0113]

Example 3

[0114] This embodiment discloses another wheelbase adjustment mechanism. Embodiment 3 is based on Embodiment 1 or 2, such as... Figure 10 and Figure 15 As shown, the fixed shaft 33 of embodiment 3 has a boss 331. Along the axial direction of the conical wheel 31, the boss 331 abuts against the first side of the conical wheel 31. The boss 331 is used to restrict the movement of the conical wheel 31 in the axial direction of the fixed shaft 33. Specifically, with Figure 15 Taking the orientation shown as an example, the boss 331 is located on the left side of the cone wheel 31 to limit the movement of the cone wheel 31 to the left in the direction of the fixed shaft 33 axis, thereby improving the stability of the cone wheel 31's guidance.

[0115] In this embodiment, the boss 331 is an annular structure, which is formed by the different diameters at different axial positions of the fixed shaft 33. The conical wheel 31 is sleeved on the smaller diameter part of the fixed shaft 33, so that the boss 331 formed by the adjacent and larger diameter part of the fixed shaft 33 can restrict the unilateral displacement of the conical wheel 31, improve the stability of the conical wheel guide, simplify the guide unit structure, and reduce costs.

[0116] In other alternative embodiments, the boss 331 may also be a block or other shape that can achieve the above-mentioned functions.

[0117] like Figure 15 As shown, the guide unit 3 also includes a first limiting structure. The conical wheel 31 is sandwiched between the boss 331 and the first limiting structure. The first limiting structure is used to restrict the movement of the conical wheel 31 in the direction of the axis of the fixed shaft 33.

[0118] like Figure 10 and Figure 15 As shown, the first limiting structure includes a first limiting member 51 and a limiting groove 52 disposed on the outer circumferential surface of the fixed shaft 33. The first limiting member 51 is connected to the fixed shaft 33 and partially located within the limiting groove 52. In this embodiment, the first limiting member 51 is a retaining ring, and the limiting groove 52 is arranged circumferentially around the fixed shaft 33. The retaining ring is sleeved on the fixed shaft 33 and engaged within the limiting groove 52. The retaining ring structure is simple and is existing technology; therefore, technicians do not need to make special designs for the first limiting member 51, and the limiting of the conical wheel 31 can be achieved using existing materials, reducing costs. The limiting groove 52 provides the installation and positioning function for the retaining ring.

[0119] Specifically, with Figure 15 Taking the shown orientation as an example, the first limiting mechanism is located on the right side of the conical wheel 31. This mechanism restricts the movement of the conical wheel 31 to the right along the axis of the fixed shaft 33, preventing the conical wheel 31 from detaching from the fixed shaft 33 and excessively extending into the slide groove 32, thus ensuring smooth wheelbase adjustment. In this embodiment, the boss 331 of the fixed shaft 33 and the first limiting structure jointly restrict the movement of the conical wheel 31 to both sides along the axis of the fixed shaft 33, preventing the conical wheel 31 from detaching from the fixed shaft 33, ensuring the relatively stable position of the conical wheel 31 within the slide groove 32, and improving the stability and smoothness of the conical wheel 31's guidance.

[0120] In other alternative embodiments, the first limiting member 51 may also adopt other structures that can achieve the above functions, such as a nut.

[0121] like Figure 15 As shown, to prevent the cone wheel 31 from being overly clamped by the boss 331 and the retaining spring, and to ensure that the cone wheel 31 can rotate smoothly, along the axis of the fixed shaft 33, the second side of the cone wheel 31 ( Figure 15There is a gap between the right side of the circlip and the end face of the cone wheel 31.

[0122] like Figure 15 As shown, the guide unit 3 further includes a bushing 6, and the conical wheel 31 is rotatably connected to the fixed shaft 33 through the bushing 6. That is, the bushing 6 is sleeved on the fixed shaft 33, and the conical wheel 31 is sleeved on the bushing 6, thereby realizing the rotation of the conical wheel 31 relative to the fixed shaft 33, so as to reduce the frictional force when the conical wheel 31 rotates relative to the fixed shaft 33.

[0123]

Example 4

[0124] This embodiment discloses another wheelbase adjustment mechanism. Embodiment 4 is based on any one of Embodiments 1 to 3, such as... Figure 16 As shown, further, along the axial direction of the fixed shaft 33, at least one end face of the fixed shaft 33 is provided with a disassembly / assembly groove 332 for cooperating with a disassembly / assembly tool. Specifically, as... Figure 7 As shown, in this embodiment, a disassembly groove 332 is provided at the end of the fixed shaft 33 away from the tapered wheel 31. The disassembly groove 332 is a through groove to accommodate various sizes of disassembly and assembly tools. The disassembly groove 332 facilitates the installation and disassembly of the fixed shaft 33 and the adapter frame 213.

[0125] In other alternative embodiments, the disassembly groove 332 can also be provided at one end of the fixed shaft 33 near the tapered wheel 31, or a disassembly groove 332 can be provided at each of the two axial ends of the fixed shaft 33 to improve the flexibility of disassembly and assembly.

[0126]

Example 5

[0127] This embodiment provides a lifting device, including a wheelbase adjustment mechanism 11 as shown in any one of embodiments 1-4.

[0128] like Figure 1 and Figure 2 As shown, in this embodiment, there are two wheelbase adjustment mechanisms 11. The two wheelbase adjustment mechanisms 11 are respectively arranged at both ends of the lifting device along the width direction of the vehicle, and are used to support the two front wheels of the vehicle.

[0129] like Figure 2 As shown, the lifting device also includes a frame 13 and a drive mechanism 12. The drive mechanism 12 is connected to the wheelbase adjustment mechanism 11 and is used to drive the wheelbase adjustment mechanism 11 to move along the vehicle's driving direction, thereby driving the wheel bearing unit 2 to move along the vehicle's driving direction to achieve wheelbase adjustment.

[0130] Specifically, the fixed end of the drive mechanism 12 is installed on the frame body 13 of the lifting device, and the movable end of the drive mechanism 12 is connected to the wheel bearing unit 2. By driving the wheel bearing unit 2 to move along the vehicle driving direction, the conical wheel 31 connected to the wheel bearing unit 2 is driven to roll on the slide groove 32.

[0131] In this embodiment, the drive mechanism 12 is a hydraulic cylinder. In other alternative embodiments, a pneumatic cylinder or other drive structure capable of achieving the above functions can also be selected as the drive mechanism 12.

[0132] In the description of this invention, it should be understood that, except where specifically indicated by the orientation of the device or component as shown in the accompanying drawings, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the device or component during normal use. They are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0133] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A track adjustment mechanism, characterized by, The axle distance adjusting mechanism comprises: a wheel carrying unit for carrying wheels of a vehicle; a guide unit comprising a matched bevel gear and a sliding groove, the bevel gear is rotatably connected to the wheel carrying unit, the sliding groove extends along the driving direction of the vehicle, the bevel gear is matched with the sliding groove in shape to guide the wheel carrying unit to adjust the position along the driving direction of the vehicle; the guide unit further comprises a fixed shaft, the bevel gear is sleeved on the fixed shaft and is rotatably connected to the fixed shaft, the bevel gear can rotate along its own axis, the fixed shaft is connected to the wheel carrying unit through a position adjusting structure, the position adjusting structure is used to adjust the distance between the bevel gear and the wheel carrying unit along the axis direction of the fixed shaft, so that the bevel gear is located in the notch of the sliding groove and can reciprocate along the extension direction of the sliding groove.

2. The track adjustment mechanism of claim 1, wherein, Along the driving direction of the vehicle, the guide units are arranged on both sides of the wheel carrying unit in pairs.

3. The track width adjustment mechanism of claim 2, wherein, The guide unit comprises one sliding groove and two pairs of fixed shafts and bevel gears arranged correspondingly, and the two pairs of fixed shafts and bevel gears are arranged in a spaced manner along the driving direction of the vehicle.

4. The track width adjustment mechanism of claim 1, wherein, The fixed shaft has a boss, which abuts against the first side of the bevel gear along the axis direction of the bevel gear, and the boss is used to limit the movement of the bevel gear along the axis direction of the fixed shaft.

5. The track adjustment mechanism of claim 4, wherein, The guide unit further comprises a first limiting structure, the bevel gear is clamped between the boss and the first limiting structure, and the first limiting structure is used to limit the movement of the bevel gear along the axis direction of the fixed shaft.

6. The track adjustment mechanism of claim 5, wherein, The first limiting structure comprises a first limiting piece and a limiting groove provided on the outer circumferential surface of the fixed shaft, and the first limiting piece is connected to the fixed shaft and partially located in the limiting groove.

7. The track adjustment mechanism of claim 6, wherein, The first limiting piece is a clasp spring, the limiting groove is arranged around the circumference of the fixed shaft, the clasp spring is sleeved on the fixed shaft and clamped in the limiting groove.

8. The track width adjustment mechanism of claim 6, wherein, Along the axis direction of the fixed shaft, there is a gap between the second side of the bevel gear and the end face of the first limiting piece close to the bevel gear.

9. The track width adjustment mechanism of claim 1, wherein, The guide unit further comprises a shaft sleeve, and the bevel gear is rotatably connected to the fixed shaft through the shaft sleeve.

10. The track width adjustment mechanism of claim 4, wherein, The fixed shaft is detachably connected to the wheel carrying unit through the position adjusting structure.

11. The track width adjustment mechanism of claim 10, wherein, The wheel carrying unit comprises a mounting frame, the position adjusting structure comprises a threaded hole with internal threads provided on the mounting frame and external threads provided on the fixed shaft, and the fixed shaft is detachably connected to the mounting frame through engagement of the external threads and the internal threads.

12. The track width adjustment mechanism of claim 11, wherein, The mounting frame comprises a mounting frame body and an adapter frame connected to each other, the mounting frame body is provided with a receiving groove with an opening facing upward for carrying wheels, and the threaded hole is provided on the adapter frame.

13. The track width adjustment mechanism of claim 12, wherein, The guide unit further comprises a second limiting structure provided on the adapter frame, and the second limiting structure is used to limit the rotation of the fixed shaft along its own axis.

14. The track width adjustment mechanism of claim 13, wherein, The second limiting structure comprises: a second limiting hole provided on the outer circumferential surface of the fixed shaft; a second limiting piece penetrating the second limiting hole; a locking hole provided on the adapter frame, and the second limiting piece penetrates the locking hole.

15. The track width adjustment mechanism of claim 13, wherein, The second limiting structure comprises: A second limiting hole is formed on the outer circumferential surface of the fixing shaft. A second limiting member is arranged in the second limiting hole. A locking portion is arranged on the adapter frame, and the locking portion is provided with an accommodating area for the fixing shaft and a locking hole for the second limiting member.

16. The track width adjustment mechanism of claim 15, wherein, The locking portion is a straight cylinder, and the inner surface of the straight cylinder is matched with the outer circumferential surface of the fixing shaft.

17. The track width adjustment mechanism of claim 15, wherein, The second limiting hole is a plurality of holes, and the plurality of second limiting holes are arranged along the circumferential direction of the fixing shaft.

18. The track width adjustment mechanism of claim 17, wherein, The locking hole is a plurality of holes, and the plurality of locking holes are arranged along the circumferential direction of the fixing shaft.

19. The track width adjustment mechanism of claim 15, wherein, The second limiting hole is a threaded hole, and the second limiting member is a set screw.

20. The track width adjustment mechanism of claim 15, wherein, The locking portion is arranged on the end surface of the adapter frame away from the bevel gear.

21. The track width adjustment mechanism of claim 12, wherein, The adapter frame comprises: A horizontally arranged top plate is arranged on the mounting frame body. Two vertically arranged adapter plates are arranged at the two ends of the top plate along the vehicle width direction, and the two vertically arranged adapter plates and the top plate form an inverted U-shaped structure with the opening facing downward.

22. The track width adjustment mechanism of claim 1, wherein, A threaded hole is formed on the vertically arranged adapter plate.

23. A lifting device, characterized in that Along the axis direction of the fixing shaft, at least one end surface of the fixing shaft is provided with a dismounting groove matched with a dismounting tool. The lifting device comprises a frame body, a driving mechanism and the axle distance adjusting mechanism according to any one of claims 1-22, the driving mechanism is arranged on the frame body and connected with the axle distance adjusting mechanism, and the driving mechanism is used to drive the axle distance adjusting mechanism to move along the driving direction of the vehicle.

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