Spare tire up-down regulator

Abstract

The utility model discloses a spare tire up-down regulator which comprises a spare tire tray, a pull rope and a traction device used for being installed on a vehicle body. The traction device comprises a rope hub and a driving shaft used for driving the rope hub to rotate, the first end of the pull rope is wound in the rope hub, the second end of the pull rope is connected with the spare tire tray, and the two ends of the driving shaft are provided with a first connector and a second connector respectively, and the first connector and the second connector are matched with external driving parts. According to the spare tire up-down regulator, the first connector and the second connector are arranged at the two ends of the driving shaft of the traction device correspondingly, when a spare tire is installed, a tightening tool can be connected with the first connector and can also be connected with the second connector, and therefore a worker can install the spare tire at the bottom of a vehicle; and a tightening tool is connected with the second connector from the bottom of the vehicle to drive the spare tire tray to be tightened, so that one person can complete the mounting work of the spare tire, the working efficiency is effectively improved, and meanwhile, the spare tire can be mounted in the vehicle through the first connector according to the mounting requirement.

Description

Technical Field

[0001] The present application relates to the technical field of automobile structures, and in particular to a spare tire lifter. Background Art

[0002] Spare tire lifters in current vehicles, such as Figure 7 As shown, the spare tire lifter is first installed as a whole below the bottom plate 102, and the connector 101 of the drive shaft is exposed from above the bottom plate 102. When installing the spare tire, the spare tire is placed in the spare tire tray bracket 103, and a tightening tool is used to connect it to the connector 101 from above the bottom plate 102 on the inside of the vehicle. The drive shaft is rotated by the tightening tool to pull the spare tire tray bracket 103 up, thereby pulling the spare tire to the bottom of the vehicle chassis.

[0003] In this spare tire lifter structure, the spare tire is installed under the vehicle chassis, and the connecting head of the drive shaft is located inside the vehicle. When installing the spare tire on the assembly line in the factory assembly workshop, one person is required to install the spare tire under the vehicle, and another person is required to use a tightening tool inside the vehicle. At least two people are needed to complete the installation, and the installation efficiency is low. Utility Model Content

[0004] The purpose of the present application is to overcome the shortcomings of the prior art that the installation of a spare tire requires the cooperation of two persons and the installation efficiency is low, and to provide a spare tire lifter that can be operated by one person.

[0005] The technical solution of the present application provides a spare tire lifter, comprising a spare tire tray, a pull rope, and a traction device for installation on a vehicle body;

[0006] The traction device includes a rope hub and a driving shaft for driving the rope hub to rotate. The first end of the pull rope is retracted in the rope hub, and the second end is connected to the spare tire tray. The two ends of the driving shaft are respectively provided with a first connector and a second connector that match the external driving component.

[0007] Furthermore, the first connecting head and the second connecting head are both external hexagonal connecting columns.

[0008] Furthermore, the traction device further comprises a driving assembly and a limit ring, and the driving shaft further comprises a circular shaft body connected between the first connector and the second connector;

[0009] The circular shaft body comprises a first section connected to the first connector and a second section connected to the second connector, the diameter of the first section is larger than the diameter of the second section, a first step surface is formed at the connection between the first section and the second section, and a limiting ring groove is provided on the second section;

[0010] The circular shaft passes through the driving assembly and the rope hub in sequence, the first step surface abuts against the driving assembly, the limiting retaining ring is installed in the limiting ring groove, and the limiting ring groove abuts against the lower surface of the rope hub.

[0011] Furthermore, the outer surface of the second section is also provided with a second step surface, and the second step surface is in conflict with the upper surface of the rope hub.

[0012] Furthermore, the minimum outer diameter of the first connector is greater than the diameter of the first section, and the maximum outer diameter of the second connector is smaller than the diameter of the second section.

[0013] Further, the driving assembly includes a transmission gear and a driving wheel, and the driving wheel is connected between the transmission gear and the rope hub;

[0014] The transmission gear is provided with an axial hole, and the upper end edge of the axial hole is provided with a third step surface matching the first step surface.

[0015] Furthermore, the driving assembly further comprises an overload clamp, and the overload clamp is provided with a clamping tooth and a limiting hole;

[0016] The limiting hole is a waist-shaped hole, and two symmetrically arranged limiting notches are provided on the first step surface, and the two straight edges of the limiting hole are respectively installed in the two limiting notches;

[0017] The latching teeth cooperate with the gear ring on the outer edge of the transmission gear.

[0018] Furthermore, it also includes a safety rope for tightening the spare tire tray when the pull rope breaks, one end of the safety rope is connected to the traction device, and the other end is connected to the spare tire tray.

[0019] Furthermore, the traction device further comprises a shell and a guide tube connected to the shell, the rope hub is installed in the shell, and the second end of the pull rope extends from the guide tube to connect to the spare tire tray;

[0020] The upper end of the safety rope is connected to the guide tube, and the lower end is connected to the spare tire tray.

[0021] Furthermore, the guide tube is connected to a corner bracket for connecting to the vehicle body, and the upper end of the safety rope is connected to the corner bracket.

[0022] After adopting the above technical solution, the following beneficial effects are achieved:

[0023] In the spare tire lifter of the present application, a first connecting head and a second connecting head are respectively provided at both ends of the driving shaft of the traction device. When installing the spare tire, the tightening tool can be connected to the first connecting head or the second connecting head. The staff can install the spare tire at the bottom of the vehicle and connect the tightening tool to the second connecting head from the bottom of the vehicle to drive the spare tire tray to tighten, so that one person can complete the installation of the spare tire, effectively improving work efficiency. At the same time, according to installation needs, it can also be installed from inside the vehicle through the first connecting head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The disclosure of this application will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of this application. In the drawings:

[0025] Figure 1 is a schematic structural diagram of a spare tire lifter in one embodiment of the present application;

[0026] Figure 2 is a cross-sectional view of a traction device in one embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the structure of a drive shaft in one embodiment of the present application;

[0028] Figure 4 is an exploded view of the internal structure of the traction device in one embodiment of the present application;

[0029] Figure 5 is a perspective view of the cooperation between the driving wheel and the rope hub in one embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of the structure of the pin shaft in one embodiment of the present application;

[0031] Figure 7 The utility model is a schematic diagram of the installation structure of the spare tire lifter on the vehicle body in the prior art.

[0032] Reference table of reference numerals:

[0033] Spare tire tray 1, pull rope 2, traction device 3, safety rope 4;

[0034] Rope hub 01: gear groove 11, convex teeth 12;

[0035] Driving shaft 02: first connector 21, second connector 22, circular shaft body 23, first section 231, second section 232, first step surface 233, limiting groove 2331, limiting ring groove 234, second step surface 235;

[0036] Shell 03, foam 31;

[0037] Limiting ring 04;

[0038] Transmission gear 05: shaft hole 51, third step surface 511, connecting shaft 52;

[0039] Driving wheel 06: connecting hole 61, gear ring 62, notch 63;

[0040] Pin shaft 07: locking gear 71, first gear 711, counting tooth 7111, limiting tooth 7112, second gear 712, retaining spring 72;

[0041] Overload clamp 08: limit clamp plate 81, limit hole 811, U-shaped clamp plate 82, clamping teeth 821;

[0042] Guide tube 09: corner bracket 91. DETAILED DESCRIPTION

[0043] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0044] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0045] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above-mentioned in this application can be understood according to the specific circumstances.

[0047] The spare tire lifter in the embodiment of the present application is as follows: Figure 1-Figure 3 As shown, it includes a spare tire tray 1, a pull rope 2 and a traction device 3 for installation on the vehicle body;

[0048] The traction device 3 includes a rope hub 01 and a driving shaft 02 for driving the rope hub 01 to rotate. The first end of the pull rope 2 is rolled up in the rope hub 01, and the second end is connected to the spare tire tray 1. The two ends of the driving shaft 02 are respectively provided with a first connector 21 and a second connector 22 that match the external driving component.

[0049] Specifically, the spare tire tray 1 is in the shape of an elongated strip, with a width smaller than the diameter of the center hole of the spare tire and a length larger than the diameter of the center hole of the spare tire. When installing, the spare tire tray 1 is passed through the center hole of the spare tire. The traction device 3 is used to be installed on the lower surface of the chassis of the vehicle, and is provided with a rope hub 01 for winding the pull rope 2. The pull rope 2 extends from the traction device 3 and is connected to the spare tire tray 1. The driving shaft 02 drives the rope hub 01 to rotate, and can drive the pull rope 2 to extend or retract from the rope hub.

[0050] like Figure 2 As shown, the traction device 3 is provided with a housing 03, the drive shaft 02 passes through the housing 03, and the first connector 21 and the second connector 22 extend from the upper and lower parts of the housing 03 respectively. The traction device 3 is used to be installed under the chassis of the vehicle, and the first connector 21 extends into the cabin through the vehicle floor. Foam 31 is also provided on the upper surface of the housing 03, and the foam 31 is located at the periphery of the first connector 21. When the traction device 3 is installed, the first connector 21 extends from the through hole of the vehicle floor, and the foam 31 is compressed by the lower surface of the vehicle floor, thereby sealing the periphery of the through hole of the vehicle floor.

[0051] When installing the spare tire, first extend the pull rope 2, pass the spare tire tray 1 through the center hole of the spare tire and hold the spare tire, then connect the tightening tool (such as an air gun) to the first connector 21 or the second connector 22, control the tightening tool to drive the drive shaft 02 to rotate, drive the rope hub 01 to rotate and reel in the pull rope 2, thereby driving the spare tire tray 1 to pull the spare tire to under the vehicle chassis.

[0052] The length of the pull rope 2 should be greater than the vertical distance between the traction device 3 and the ground to ensure that the spare tire is lowered to a distance that can touch the ground, which is convenient for the staff to operate.

[0053] The spare tire lifter in the embodiment of the present application has a drive shaft 02 provided with a first connector 21 and a second connector 22 which are respectively located inside the vehicle and under the vehicle. The staff can choose to operate and lift the spare tire from inside the vehicle or under the vehicle, which is more operable. When operating from under the vehicle, only one person is needed to complete the installation of the spare tire, and the installation efficiency is high.

[0054] In one embodiment, the first connection head 21 and the second connection head 22 are both external hexagonal connection columns.

[0055] Specifically, the tightening tool for installing the spare tire generally adopts an air gun, which is connected to the drive shaft 02 through a hexagonal sleeve. In order to match the hexagonal sleeve, the first connector 21 and the second connector 22 are set as external hexagonal connecting columns. The sizes of the first connector 21 and the second connector 22 can be different. When installing, only the hexagonal sleeves of different specifications need to be replaced to match the air gun.

[0056] In one embodiment, if Figure 2-Figure 4 As shown, the traction device 3 further includes a driving assembly and a limit ring 04, and the driving shaft 02 further includes a circular shaft body 23 connected between the first connector 21 and the second connector 22;

[0057] The circular shaft body 23 includes a first section 231 connected to the first connector 21 and a second section 232 connected to the second connector 22. The diameter of the first section 231 is greater than the diameter of the second section 232. A first step surface 233 is formed at the connection between the first section 231 and the second section 232. A limiting ring groove 234 is provided on the second section 232.

[0058] The circular shaft 23 passes through the driving assembly and the rope hub 01 in sequence, the first step surface 233 contacts the driving assembly, the limiting retaining ring 04 is installed in the limiting ring groove 234, and the limiting ring groove 234 contacts the lower surface of the rope hub 01.

[0059] Specifically, the drive shaft 02 is an integrally formed structure, the circular shaft body 23 is located between the first connector 21 and the second connector 22, and the drive shaft 02 is connected to the drive assembly and the rope hub 01 through the circular shaft body 23, and the drive assembly is used to transmit the power of the drive shaft 02 to the rope hub 01. The circular shaft body 23 is provided with a first step surface 233 that abuts against the drive assembly to limit the upper end of the drive assembly; and a limiting ring groove 234 is provided on the second section 232, and the lower end of the rope hub 01 is limited by clamping the limiting retaining ring 04 in the limiting ring groove 234.

[0060] During installation, first pass one end of the second connector 22 of the circular shaft 23 through the drive assembly and the rope hub 01 in sequence, so that the first step surface 233 abuts against the drive assembly, then push the rope hub 01 from bottom to top so that the rope hub 01 abuts against the bottom of the drive assembly, and then insert the limit ring 04 into the limit ring groove 234 to limit the drive assembly and the rope hub 01.

[0061] In one embodiment, if Figure 2 , Figure 3 As shown, the outer surface of the second section 232 is further provided with a second step surface 235 , and the second step surface 235 abuts against the upper surface of the rope hub 01 .

[0062] In the embodiment of the present application, a second step surface 235 is provided on the outer surface of the second section 232 to abut against the upper surface of the rope hub 01, and the limiting ring 04 is used to limit the lower surface of the rope hub 01, so as to limit the axial position of the rope hub 01, thereby ensuring that the rope hub 01 can be stably installed in the shell 03, and no axial shaking occurs when the pull rope 2 is retracted, thereby more stably retracting and releasing the spare tire.

[0063] In one embodiment, if Figure 3 As shown, the minimum outer diameter of the first connector 21 is greater than the diameter of the first section 231 , and the maximum outer diameter of the second connector 22 is smaller than the diameter of the second section 232 .

[0064] Specifically, the axes of the first connector 21, the first section 231, the second section 232, and the second connector 22 are all on the same straight line. The cross-sections of the first connector 21 and the second connector 22 are both regular hexagons, the minimum outer diameter of the first connector 21 is the vertical distance between two opposite sides of the regular hexagon, and the maximum outer diameter of the second connector 22 is the distance between two opposite corners of the regular hexagon.

[0065] The minimum outer diameter of the first connecting head 21 is larger than the diameter of the first section 231, the maximum outer diameter of the second connecting head 22 is smaller than the diameter of the second section 232, and the diameter of the first section 231 is larger than the diameter of the second section 232, that is, the drive shaft 02 becomes thinner in the direction from the first connecting head 21 to the second connecting head 22, so that the drive shaft 02 limits the drive assembly and the rope hub 01 in turn.

[0066] In one embodiment, if Figure 4 As shown, the driving assembly includes a transmission gear 05 and a driving wheel 06, and the driving wheel 06 is connected between the transmission gear 05 and the rope hub 01;

[0067] The transmission gear 05 is provided with an axial hole 51 , and an upper end edge of the axial hole 51 is provided with a third step surface 511 matching the first step surface 233 .

[0068] The transmission gear 05 is driven to rotate by the driving shaft 02, so that the transmission gear 05 drives the driving wheel 06 to rotate, and then the rope hub 01 is rotated to realize the retraction and release of the pull rope 2. Specifically, a connecting shaft 52 is provided in the transmission gear 05, and an axial hole 51 is provided in the connecting shaft 52. The axis of the axial hole 51 is parallel to the axis of the connecting shaft 52 and does not overlap, so that the transmission gear 05 is an eccentric wheel; an axially penetrating connecting hole 61 is provided on the driving wheel 06, and a gear ring 62 is provided on the side facing the rope hub 01. The connecting shaft 52 of the transmission gear 05 is inserted into the connecting hole 61 of the driving wheel 06, and the driving shaft 02 passes through the axial hole 51, the connecting hole 61 and the center hole of the rope hub 01 in sequence, and the third step surface 511 at the upper edge of the axial hole 51 matches the first step surface 233.

[0069] In order to limit the movement of the driving wheel 06, a notch 63 is provided on one side of the driving wheel 06, and a pin 07 is installed in the notch 63. The driving shaft 02 drives the transmission gear 05 to rotate with the axis of the shaft hole 51 as the axis. Since the axis of the shaft hole 51 and the axis of the connecting shaft 52 are not on the same straight line, the driving wheel 06 reciprocates relative to the pin 07 under the drive of the driving shaft 02 and the restriction of the pin 07. The upper surface of the rope hub 01 is provided with a gear groove 11, and the toothed ring 62 of the driving wheel 06 is installed in the gear groove 11, as shown in FIG. Figure 5 As shown, the driving wheel 06 makes reciprocating motion relative to the pin shaft 07 and circular motion relative to the rope hub 01. The gear groove 11 is larger than the gear ring 62. The gear ring 62 is located in the gear groove 11 and at least partially meshes with the gear groove 11. The gear ring 62 drives the rope hub 01 to rotate continuously by meshing with the gear groove 11, thereby realizing the retraction and release of the pull rope 2.

[0070] Furthermore, if Figure 6 As shown, a rotatable locking gear 71 is also installed on the pin shaft 07. The locking gear 71 includes a first gear 711 and a second gear 712. The first gear 711 is provided with a counting tooth 7111 and a limiting tooth 7112. The edge of the rope hub 01 is provided with a convex tooth 12. The convex tooth 12 is used to mesh with the counting tooth 7111 and to drive the locking gear 71 to rotate. Every time the rope hub 01 rotates one circle, the convex tooth 12 drives the locking gear 71 to rotate one counting tooth 7111 until the convex tooth 12 rotates to contact the limiting tooth 7112, thereby limiting the rotation of the rope hub 01. A retaining spring 72 is also installed on one side of the second gear 712. The retaining spring 72 meshes with one of the gear teeth of the second gear 712. The retaining spring 72 is used to limit the locking gear 71 to rotate only one gear tooth each time it is toggled, thereby improving the accuracy of limiting the rotation of the rope hub 01.

[0071] In one embodiment, the driving assembly further includes an overload clamp 08, and the overload clamp 08 is provided with a clamping tooth 821 and a limiting hole 811;

[0072] The limiting hole 811 is a waist-shaped hole, and two symmetrically arranged limiting grooves 2331 are provided on the first step surface 233, and the two straight edges of the limiting hole 811 are respectively installed in the two limiting grooves 2331;

[0073] The latching tooth 821 cooperates with the gear ring on the outer edge of the transmission gear 05 .

[0074] Specifically, the limiting hole 811 cooperates with the two limiting slots 2331, so that the drive shaft 02 can drive the overload clamp 08 to rotate synchronously. The overload clamp 08 is provided with a latching tooth 821 that cooperates with the gear ring on the outer edge of the transmission gear 05, so that the drive shaft 02 can drive the rope hub 01 to rotate through the transmission gear 05, until the rope hub 01 rotates to be locked by the locking gear 71, then the drive wheel 06 and the transmission gear 05 are both locked, and at this time, the drive shaft 02 continues to rotate, and the latching tooth 821 will rotate relative to the gear ring on the outer edge of the transmission gear 05, thereby making a sound, and the staff can judge whether the pull rope 2 is lifted in place by monitoring the sound in the traction device 3.

[0075] Preferably, the overload clamp 08 includes a limit clamp 81 and a U-shaped clamp 82. The U-shaped clamp 82 is installed below the limit clamp 81. The limit clamp 81 is provided with at least two notches. Part of the U-shaped clamp 82 is inserted into the notches, so that the limit clamp 81 and the U-shaped clamp 82 can rotate synchronously. Among them, the limit hole 811 is provided in the limit clamp 81, and the clamping tooth 821 is provided in the U-shaped clamp 82. The U-shaped clamp 82 has a certain elasticity. When the clamping tooth 821 rotates relative to the gear ring on the outer edge of the transmission gear 05, the U-shaped clamp 82 can produce a certain elastic deformation to prevent the clamping tooth 821 from being stuck with the transmission gear 05.

[0076] In one embodiment, if Figure 1 As shown, the spare tire lifter further includes a safety rope 4 for tightening the spare tire tray 1 when the pull rope 2 breaks, one end of the safety rope 4 is connected to the traction device 3, and the other end is connected to the spare tire tray 1.

[0077] In the embodiment of the present application, a safety rope 4 is connected between the traction device 3 and the spare tire tray 1. The safety rope 4 is spirally wound around the pull rope 4, and the length of the safety rope 4 should be greater than the length of the pull rope 2 to ensure that when the pull rope 2 breaks, the safety rope 4 can hold the spare tire tray 1 to prevent the spare tire from falling off and affecting the driving safety of the rear vehicle.

[0078] In one embodiment, if Figure 1 As shown, the traction device 3 further includes a housing 03 and a guide tube 09 connected to the housing 03, the rope hub 01 is installed in the housing 03, and the second end of the pull rope 2 extends from the guide tube 09 to connect to the spare tire tray 1;

[0079] The upper end of the safety rope 4 is connected to the guide tube 09 , and the lower end is connected to the spare tire tray 1 .

[0080] In the embodiment of the present application, the guide tube 09 is connected and communicated with the shell 03. The guide tube 09 is L-shaped and is used to guide the pull rope 2 so that the spare tire tray 1 and the traction device 3 maintain a certain lateral distance to avoid interference from tightening tools when installing the spare tire.

[0081] Specifically, a corner bracket 91 for connecting to the vehicle body is connected to the guide pipe 09 , and the upper end of the safety rope 4 is connected to the corner bracket 91 .

[0082] The corner bracket 91 is welded at the corner of the guide tube 09 , and the corner bracket 91 is fixedly connected to the vehicle chassis. One end of the safety rope 4 is connected to the corner bracket 91 , and the other end is connected to the spare tire tray 1 .

[0083] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0084] The above description is only the principle and preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this field, the implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included in the technical scope of the present invention. On the basis of the principle of the present application, several other variations can be made, which should also be regarded as the protection scope of the present application.

Claims

1. A spare tire lifter, characterized in that: Includes spare wheel tray, pull rope and towing device for mounting on the vehicle body; The traction device includes a rope hub and a driving shaft for driving the rope hub to rotate. The first end of the pull rope is retracted in the rope hub, and the second end is connected to the spare tire tray. The two ends of the driving shaft are respectively provided with a first connector and a second connector that match the external driving component.

2. The spare tire lifter according to claim 1, characterized in that: The first connecting head and the second connecting head are both external hexagonal connecting columns.

3. The spare tire lifter according to claim 1, characterized in that: The traction device further includes a driving assembly and a limit ring, and the driving shaft further includes a circular shaft body connected between the first connector and the second connector; The circular shaft body comprises a first section connected to the first connector and a second section connected to the second connector, the diameter of the first section is larger than the diameter of the second section, a first step surface is formed at the connection between the first section and the second section, and a limiting ring groove is provided on the second section; The circular shaft passes through the driving assembly and the rope hub in sequence, the first step surface abuts against the driving assembly, the limiting retaining ring is installed in the limiting ring groove, and the limiting ring groove abuts against the lower surface of the rope hub.

4. The spare tire lifter according to claim 3, characterized in that: The outer surface of the second section is also provided with a second step surface, and the second step surface abuts against the upper surface of the rope hub.

5. The spare tire lifter according to claim 3, characterized in that: The minimum outer diameter of the first connector is greater than the diameter of the first section, and the maximum outer diameter of the second connector is smaller than the diameter of the second section.

6. The spare tire lifter according to claim 3, characterized in that: The driving assembly comprises a transmission gear and a driving wheel, wherein the driving wheel is connected between the transmission gear and the rope hub; The transmission gear is provided with an axial hole, and the upper end edge of the axial hole is provided with a third step surface matching the first step surface.

7. The spare tire lifter according to claim 6, characterized in that: The drive assembly further comprises an overload clamp, wherein the overload clamp is provided with a clamping tooth and a limiting hole; The limiting hole is a waist-shaped hole, and two symmetrically arranged limiting notches are provided on the first step surface, and the two straight edges of the limiting hole are respectively installed in the two limiting notches; The latching teeth cooperate with the gear ring on the outer edge of the transmission gear.

8. The spare tire lifter according to any one of claims 1 to 7, characterized in that: It also includes a safety rope for tightening the spare tire tray when the pull rope breaks, one end of the safety rope is connected to the traction device, and the other end is connected to the spare tire tray.

9. The spare tire lifter according to claim 8, characterized in that: The traction device further comprises a shell and a guide tube connected to the shell, the rope hub is installed in the shell, and the second end of the pull rope extends from the guide tube to connect to the spare tire tray; The upper end of the safety rope is connected to the guide tube, and the lower end is connected to the spare tire tray.

10. The spare tire lifter according to claim 9, characterized in that: The guide tube is connected with a corner bracket for connecting with the vehicle body, and the upper end of the safety rope is connected with the corner bracket.

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