Traction mechanism and vehicle
By introducing the fit between the slider and the locking member into the traction mechanism, ensuring that the locking member is accurately inserted into or disconnected from the traction hook body, the problem of poor locking state stability in the prior art is solved and the service life of the traction mechanism is extended.
Patent Information
- Application Number
- CN202411795728.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-01-10
AI Technical Summary
The existing vehicle traction hooks have poor stability in the locked state, resulting in a short service life. This is mainly due to the gradual increase in the initial tiny gap under the action of load, which affects the stability of the locked state and aggravates the wear of internal parts.
A traction mechanism is designed, including a fixing assembly, drive shaft, drive member, traction hook body and locking assembly. Through the cooperation of the slider and locking member, the locking member ensures that the locking member is accurately inserted into or disconnected from the traction hook body, and reduces the fitting gap. , improve stability in locked state, and accurately lock and unlock the traction hook body through transmission assembly and output shaft.
The stability of the traction mechanism in the locked state is improved, the wear between the locking member and the traction hook body is reduced, and the service life is extended.
Smart Images
Figure CN119283543A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle traction devices, and in particular to a traction mechanism and a vehicle. Background Art
[0002] At present, some vehicles are equipped with a towing hook at the rear to tow RVs, trailers, etc. The automatic towing hooks available on the market all adopt the working principle of "unlock"-"drive"-"lock", so that the towing hook body is retracted when not in use, and extended and locked outside the vehicle body when in use.
[0003] The existing locking scheme needs to take into account both unlocking and driving conditions. In terms of design, a reasonable gap needs to be reserved. This results in the structure being unable to be completely and firmly locked when it is locked again, and there will be a tiny gap. At the beginning of use, the impact is not significant, but after long-term use, under the action of load, the initial tiny gap will gradually increase, resulting in poor stability in the locked state. In addition, the gradually increasing gap will intensify the wear between internal parts, resulting in a shorter service life of the automatic towing hook. Summary of the invention
[0004] In view of the above, it is necessary to propose a traction mechanism to improve the stability in the locked state and increase the service life.
[0005] The embodiment of the present application provides a traction mechanism, including a fixing component, a driving shaft, a driving member, a traction hook body, a driving seat and a locking component, wherein a receiving hole is provided in the middle of the fixing component, and a through hole connected to the receiving hole is provided on the side wall of the fixing component; the driving shaft is passed through the receiving hole and can rotate relative to the fixing component; the driving member is transmission-connected to one end of the driving shaft for driving the driving shaft to rotate; the traction hook body is rotationally sleeved on the outer side of the fixing component and transmission-connected to the driving shaft so as to rotate relative to the fixing component under the drive of the driving shaft; the driving seat is fixedly sleeved on the driving shaft and The driving seat extends into the receiving hole and is close to one end of the driving member, and has a first transmission part; the locking assembly includes a sliding member and a locking member, the sliding member is slidably sleeved on the driving shaft and is located in the receiving hole, the sliding member has a second transmission part that is slidably abutted against the first transmission part, the first transmission part and the second transmission part cooperate to make the sliding member slide along the axial direction of the driving shaft, the locking member is movably provided on the sliding member and can move radially along the driving shaft, and the locking member is used to insert into or disengage from the traction hook body through the through hole to put the traction hook body in a locked state or an unlocked state.
[0006] In some embodiments, one of the first transmission portion and the second transmission portion is a guide groove, and the other of the first transmission portion and the second transmission portion is a sliding block extending into the guide groove.
[0007] In some embodiments, the guide groove includes a first inclined section, a horizontal section, and a second inclined section connected in sequence, the horizontal section is perpendicular to the axis of the drive shaft, the first inclined section and the second inclined section are parallel, and the angle between the first inclined section and the horizontal section and the angle between the second inclined section and the horizontal section are both obtuse angles of the same size.
[0008] In some embodiments, an extrusion groove is provided on the peripheral side of the sliding member, and the groove walls on both sides of the extrusion groove respectively have a first extrusion slope and a second extrusion slope. The locking member is movably arranged in the extrusion groove and extends into the through hole. The first extrusion slope and the second extrusion slope are used to extrude the locking member and insert it into the traction hook body so that the traction hook body is in a locked state.
[0009] In some embodiments, both ends of the locking member respectively have a first abutting inclined surface and a second abutting inclined surface that match the first extrusion inclined surface and the second extrusion inclined surface.
[0010] In some embodiments, the traction mechanism also includes a transmission assembly, an output shaft and a connecting bracket; the transmission assembly is connected to the traction hook body; the output shaft is slidably arranged at the end of the drive shaft away from the driving member along the extension direction of the drive shaft, and the output shaft can rotate under the drive of the drive shaft, and the end of the output shaft away from the drive shaft has a clamping portion for slidingly engaging with the transmission assembly; the connecting bracket is rotatably arranged on the output shaft and connected to the sliding member, and is used to drive the clamping portion to separate from the transmission assembly in the locked state, and is used to drive the clamping portion to engage with the transmission assembly in the unlocked state.
[0011] In some embodiments, the transmission assembly includes a ring gear, a sun gear and a plurality of planetary gears; the ring gear is connected to the traction hook body; the sun gear is arranged in the middle of the ring gear, and a through hole for accommodating the clamping part is opened in the middle of the sun gear, and a clamping groove is opened on one of the peripheral side wall of the clamping part and the inner wall of the through hole, and a clamping block for clamping with the clamping groove is protruded on the other of the peripheral side wall of the clamping part and the inner wall of the through hole; a plurality of planetary gears are evenly arranged around the sun gear, and each of the planetary gears is respectively meshed with the sun gear and the ring gear.
[0012] In some embodiments, the size of the cross section of the card slot gradually increases from the middle of the card slot to both ends, and the size of the cross section of the card block gradually decreases from the middle of the card block to both ends.
[0013] In some embodiments, the drive shaft includes a first drive section, a first reduction gear, a second drive section and a plurality of second reduction gears; the drive member is transmission-connected to one end of the first drive section, and the drive seat is fixedly sleeved on the first drive section; the first reduction gear is arranged at one end of the first drive section away from the drive member; the second drive section is arranged on a side of the first drive section away from the drive member, the sliding member is slidably sleeved on the second drive section, and the traction hook body is transmission-connected to the second drive section; a plurality of second reduction gears are arranged at one end of the second drive section close to the first drive section, and a plurality of second reduction gears are evenly arranged around the first reduction gear and meshed with the first reduction gear.
[0014] In summary, the traction mechanism of the embodiment of the present application is provided with a fixed component, a drive shaft, a drive member, a drive seat, a sliding member and a locking member. When the drive member drives the drive shaft to rotate forward or reverse, the drive seat drives the sliding member to move forward or backward along the axial direction of the drive shaft through the first transmission part and the second transmission part under the drive of the drive shaft, and the locking member is inserted into the traction hook body through the perforation to lock the traction hook body when the drive shaft drives the traction hook body to rotate a preset angle, and when the traction hook body needs to be unlocked, the locking member is driven by the sliding member to disengage from the traction hook body to unlock. Since the locking member is inserted into the traction hook body with high accuracy under the drive of the sliding member, the fitting clearance can be minimized during design, and the locking member is supported by the inner wall of the perforation when locking the traction hook body, and the traction hook body is supported by the peripheral side wall of the fixed component, so that the fitting clearance between the locking member and the traction hook body will not continue to increase, thereby improving the stability in the locked state and increasing the service life.
[0015] An embodiment of the present application provides a vehicle, comprising a vehicle body and the traction mechanism as described above, wherein the fixing assembly is connected to the vehicle body.
[0016] The vehicle of the embodiment of the present application improves the stability of the traction mechanism in a locked state and increases the service life of the traction mechanism by providing the traction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional structural schematic diagram of the traction mechanism provided in an embodiment of the present application.
[0018] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the traction mechanism shown.
[0019] Figure 3 yes Figure 1 The traction mechanism is shown in a schematic cross-sectional view along the III-III direction.
[0020] Figure 4 yes Figure 2A schematic diagram of the partial exploded structure of the drive shaft, drive seat, locking assembly, sun gear, output shaft and connecting bracket in the traction mechanism shown.
[0021] Figure 5 yes Figure 2 A schematic structural diagram of the drive seat in the traction mechanism shown.
[0022] Figure 6 yes Figure 2 A schematic diagram of the exploded structure of the drive shaft and output shaft in the traction mechanism shown.
[0023] Figure 7 yes Figure 2 A schematic diagram of the exploded structure of the drive shaft and the output shaft in the traction mechanism shown in another angle.
[0024] Figure 8 It is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application.
[0025] Main component symbols Vehicle 1000, traction mechanism 100, fixing assembly 10, fixing seat 11, storage hole 111, through hole 112, mounting seat 12, connecting hole 121, bearing 13, driving shaft 20, first driving section 21, bevel gear 211, second driving section 22, plug hole 221, internal spline 222, first reduction gear 23, second reduction gear 24, driving member 30, traction hook body 41, mounting hole 411, locking groove 412, cover 42, driving seat 50, first transmission part 51, guide groove 52, first inclined section 521 , horizontal section 522, second inclined section 523, locking assembly 60, sliding member 61, second transmission part 611, slider 612, extrusion groove 613, first extrusion slope 6131, second extrusion slope 6132, locking member 62, first abutment slope 621, second abutment slope 622, transmission assembly 70, ring gear 71, sun gear 72, through hole 721, block 722, planetary gear 73, output shaft 80, clamping part 81, clamping groove 811, limiting groove 82, external spline 83, connecting bracket 90, vehicle body 200. DETAILED DESCRIPTION
[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0027] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0030] See also Figure 1 and Figure 8 The embodiment of the present application provides a traction mechanism 100, which is applied to a vehicle 1000. The vehicle 1000 may be a fuel vehicle, an electric vehicle, a plug-in hybrid vehicle, etc. For ease of understanding, the embodiment of the present application is described by taking the vehicle 1000 as an electric vehicle as an example, which is obviously not a limitation of the embodiment of the present application.
[0031] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, the traction mechanism 100 includes a fixing assembly 10 , a driving shaft 20 , a driving member 30 , a traction hook body 41 , a driving seat 50 and a locking assembly 60 .
[0032] The fixing assembly 10 is used to fix to the vehicle body 200 (such as Figure 8 The fixing assembly 10 is connected as shown in the figure, a receiving hole 111 is opened in the middle of the fixing assembly 10, and a through hole 112 connected with the receiving hole 111 is opened on the side wall of the fixing assembly 10.
[0033] The driving shaft 20 passes through the receiving hole 111 and can rotate relative to the fixing assembly 10 .
[0034] The driving member 30 may be a motor. The driving member 30 is electrically connected to the vehicle body 200 and is transmission-connected to one end of the driving shaft 20 . The driving member 30 is used to drive the driving shaft 20 to rotate.
[0035] The traction hook body 41 is rotatably sleeved on the outer side of the fixing assembly 10 and is transmission-connected to the driving shaft 20 so as to rotate relative to the fixing assembly 10 under the driving of the driving shaft 20 .
[0036] The driving seat 50 is fixedly sleeved on the driving shaft 20 and extends into the receiving hole 111 close to one end of the driving member 30 . The driving seat 50 has a first transmission portion 51 .
[0037] The locking assembly 60 includes a sliding member 61 and a locking member 62. The sliding member 61 is slidably sleeved on the drive shaft 20 and is located in the storage hole 111. The sliding member 61 has a second transmission portion 611 that is slidably abutted against the first transmission portion 51. The first transmission portion 51 and the second transmission portion 611 cooperate to make the sliding member 61 slide along the axial direction of the drive shaft 20. The locking member 62 is movably provided on the sliding member 61 and can move radially along the drive shaft 20. The locking member 62 is used to insert into or disengage from the traction hook body 41 through the through hole 112 to put the traction hook body 41 in a locked state or an unlocked state.
[0038] Specifically, the driving member 30 drives the driving shaft 20 to rotate forward or reverse, so that the driving shaft 20 drives the traction hook body 41 to rotate and extend out of the vehicle body 200 or retract to a position close to the vehicle body 200. When the traction hook body 41 extends out of the vehicle body 200, the traction hook body 41 is in use and can tow a motorhome, a housing of an electrical device, etc. When the traction hook body 41 is retracted to a position close to the vehicle body 200, the installation of the traction hook body 41 can avoid making the vehicle 1000 longer and not meeting the requirements of traffic regulations.
[0039] When the driving member 30 drives the driving shaft 20 to rotate forward or reverse, the driving seat 50 drives the sliding member 61 to move forward or backward along the axial direction of the driving shaft 20 through the first transmission part 51 and the second transmission part 611 under the drive of the driving shaft 20, and the locking member 62 is inserted into the traction hook body 41 through the through hole 112 to lock the traction hook body 41 when the driving shaft 20 drives the traction hook body 41 to extend out of the vehicle body 200 at a preset angle or retract to a position close to the vehicle body 200 at a preset angle. When the traction hook body 41 needs to be switched from one locking state to another locking state, the locking member 62 is driven by the sliding member 61 to disengage from the traction hook body 41 to unlock, so as to avoid interference with the driving member 30 driving the traction hook body 41 to rotate. Since the locking member 62 is inserted into the traction hook body 41 with high accuracy under the drive of the sliding member 61, the fitting clearance can be minimized during design, and the locking member 62 is supported by the inner wall of the through hole 112 when locking the traction hook body 41, and the traction hook body 41 is supported by the peripheral side wall of the fixing component 10, so that the fitting clearance between the locking member 62 and the traction hook body 41 will not continue to increase, thereby improving the stability in the locked state and increasing the service life.
[0040] In this embodiment, the fixing assembly 10 includes a mounting seat 12, a fixing seat 11 and a bearing 13. The receiving hole 111 and the through hole 112 are both provided in the fixing seat 11. The traction hook body 41 is rotatably sleeved on the outer side of the fixing seat 11. The mounting seat 12 is provided with a connecting hole 121. The end of the fixing seat 11 close to the driving shaft 20 is penetrated in the connecting hole 121. The fixing seat 11 and the mounting seat 12 are interference fit, and the mounting seat 12 is used to connect with the vehicle body 200, so as to fix the entire traction mechanism 100. When locking the traction hook body 41, the locking member 62 is supported by the inner wall of the through hole 112, and the traction hook body 41 is supported by the peripheral side wall of the fixing seat 11, so that the matching gap between the locking member 62 and the traction hook body 41 will not continue to increase, thereby improving the stability of the traction mechanism 100 in the locked state. The bearing 13 is interference fit with the end of the receiving hole 111 away from the driving member 30. The driving seat 50 and the receiving hole 111 can be lubricated by lubricating oil, or a bearing seat (not shown) can be provided between the driving seat 50 and the receiving hole 111 for support, so that the driving shaft 20 and the driving seat 50 can rotate relative to the fixing seat 11.
[0041] Please refer to Figure 4In this embodiment, the first transmission part 51 is a guide groove 52, and the second transmission part 611 is a slider 612 extending into the guide groove 52. The guide groove 52 is provided on the peripheral side wall of the driving seat 50, and the slider 612 is convexly provided on one end of the sliding member 61 close to the driving seat 50. When the driving member 30 drives the driving shaft 20 to rotate forward or reverse, the guide groove 52 and the slider 612 cooperate to enable the driving seat 50 to drive the slider 61 to move forward or backward along the axial direction of the driving shaft 20. In this way, the structures of the first transmission part 51 and the second transmission part 611 are simple and are conducive to improving the accuracy of enabling the driving seat 50 to drive the slider 61 to move along the axial direction of the driving shaft 20.
[0042] In some other embodiments, the second transmission portion 611 may also be a guide groove 52, and correspondingly, the first transmission portion 51 is a slider 612 extending into the guide groove 52. The cooperation between the guide groove 52 and the slider 612 can also enable the driving seat 50 to drive the sliding member 61 to move axially along the driving shaft 20. The embodiments of the present application do not make specific limitations on this.
[0043] In some other embodiments, the first transmission part 51 may also be a turbine structure (not shown in the figure), and correspondingly, the second transmission part 611 is a worm structure (not shown in the figure), or alternatively, the first transmission part 51 and the second transmission part 611 are respectively matching inclined gear teeth (not shown in the figure) or inclined tooth grooves (not shown in the figure), which is not specifically limited in the embodiments of the present application.
[0044] Please refer to Figure 5 In this embodiment, the guide groove 52 includes a first inclined section 521, a horizontal section 522 and a second inclined section 523 connected in sequence, the horizontal section 522 is perpendicular to the axis of the drive shaft 20, the first inclined section 521 and the second inclined section 523 are parallel, and the angle between the first inclined section 521 and the horizontal section 522 and the angle between the second inclined section 523 and the horizontal section 522 are both obtuse angles of the same size.
[0045] Specifically, when the slider 612 slides to the first inclined section 521 and the second inclined section 523, the slider 612 drives the sliding member 61 to move under the squeezing action of the first inclined section 521 and the second inclined section 523, and the sliding member 61 drives the locking member 62 to move to lock the traction hook body 41. When the slider 612 slides to the horizontal section 522, no squeezing force is generated between the slider 612 and the horizontal section 522, and the slider 612 does not drive the sliding member 61 to move. At this time, the traction hook body 41 is in a completely unlocked state, and the locking member 62 does not impose any restriction on the rotation of the traction hook body 41, thereby facilitating the driving member 30 to drive the traction hook body 41 to switch between the two locking states, and is beneficial to increasing the angle range of the driving member 30 to drive the traction hook body 41 to rotate.
[0046] In this embodiment, an extrusion groove 613 is opened on the peripheral side of the sliding member 61, and the groove walls on both sides of the extrusion groove 613 respectively have a first extrusion slope 6131 and a second extrusion slope 6132. The locking member 62 is movably arranged in the extrusion groove 613 and extends into the through hole 112. The first extrusion slope 6131 and the second extrusion slope 6132 are used to extrude the locking member 62 and insert it into the traction hook body 41 so that the traction hook body 41 is in a locked state.
[0047] Specifically, when the slider 612 slides to the first inclined section 521 and the second inclined section 523, the slider 612 drives the slider 61 to move under the extrusion of the first inclined section 521 and the second inclined section 523. The locking member 62 is limited by the structure of the through hole 112 and can only move along the radial direction of the drive shaft 20. The first extrusion inclined surface 6131 and the second extrusion inclined surface 6132 squeeze the locking member 62 to insert into the traction hook body 41 to lock the traction hook body 41. When the slider 612 slides to the horizontal section 522, since the slider 61 does not move and the through hole 112 is directly opposite to the bottom of the extrusion groove 613, the locking member 62 is separated from the traction hook body 41, so that the traction hook body 41 is in an unlocked state. In this way, the structure of the slider 61 is simple and is conducive to improving the accuracy of driving the locking member 62 to lock and unlock the traction hook body 41.
[0048] In some other embodiments, the locking member 62 may also be connected to the sliding member 61 through a spring (not shown), and the spring elastically supports the locking member 62, so that the locking member 62 can float along the radial direction of the drive shaft 20, and the end of the locking member 62 away from the sliding member 61 is arc-shaped or spherical, and the perforations 112 are designed to be two and correspond to two locking states respectively, and the two perforations 112 are both arranged on the moving path of the locking member 62. When the locking member 62 moves to the corresponding perforations 112 driven by the sliding member 61, the locking member 62 is driven by the spring to insert into the traction hook body 41 to lock the traction hook body 41. The embodiment of the present application does not specifically limit this.
[0049] In this embodiment, the two ends of the locking member 62 respectively have a first abutting inclined surface 621 and a second abutting inclined surface 622 that match the first extrusion inclined surface 6131 and the second extrusion inclined surface 6132. In this way, the sliding member 61 presses the first abutting inclined surface 621 and the second abutting inclined surface 622 respectively through the first extrusion inclined surface 6131 and the second extrusion inclined surface 6132 to quickly lift the locking member 62, which is conducive to improving the efficiency and accuracy of the locking member 62 locking the traction hook body 41.
[0050] In this embodiment, the middle portion of the locking member 62 is cylindrical, so that the locking member 62 can be quickly disengaged from the traction hook body 41 for unlocking, and the cylindrical structure can increase the contact area between the locking member 62 and the traction hook body 41, thereby helping to reduce the probability of wear between the locking member 62 and the traction hook body 41, and further helping to increase the service life of the traction mechanism 100.
[0051] Please refer to Figure 2 In this embodiment, the traction hook body 41 is provided with a mounting hole 411, the fixing member 11 of the fixing assembly 10 is passed through the mounting hole 411, the inner wall of the mounting hole 411 is provided with a locking groove 412, and the locking member 62 is located on the moving path of the locking groove 412. When the traction hook body 41 is rotated to any locking position, the locking groove 412 is directly opposite to the locking member 62, and the locking member 62 extends into the locking groove 412 under the extrusion action of the first extrusion inclined surface 6131 and the second extrusion inclined surface 6132 to lock the traction structure.
[0052] In this embodiment, the number of the extrusion grooves 613, the through holes 112, the locking members 62 and the locking grooves 412 are all multiple and correspond to each other. The multiple extrusion grooves 613 are evenly arranged along the circumference of the sliding member 61, the multiple locking members 62 are respectively arranged in the corresponding extrusion grooves 613 and extend into the corresponding through holes 112, and the multiple locking grooves 412 are evenly opened on the inner wall of the mounting hole 411. When the locking member 62 locks the traction hook body 41, the multiple extrusion grooves 613 respectively squeeze the corresponding locking members 62 and extend into the corresponding locking grooves 412, which is conducive to improving the firmness and stability of locking the traction hook body 41.
[0053] Please refer again Figure 2 and Figure 3 In this embodiment, the traction mechanism 100 further includes a transmission assembly 70, an output shaft 80 and a connecting bracket 90. The transmission assembly 70 is connected to the traction hook body 41; the output shaft 80 is slidably disposed at the end of the drive shaft 20 away from the driving member 30 along the extension direction of the drive shaft 20, and the output shaft 80 can rotate under the drive of the drive shaft 20, and the end of the output shaft 80 away from the drive shaft 20 has a clamping portion 81 for slidingly engaging with the transmission assembly 70; the connecting bracket 90 is rotatably disposed on the output shaft 80 and connected to the sliding member 61, and the connecting bracket 90 is used to drive the clamping portion 81 to separate from the transmission assembly 70 in the locked state, and is used to drive the clamping portion 81 to engage with the transmission assembly 70 in the unlocked state.
[0054] Specifically, when the guide groove 52 and the slider 612 cooperate to make the driving seat 50 drive the sliding member 61 to move forward or backward along the axial direction of the driving shaft 20, the sliding member 61 drives the output shaft 80 to move simultaneously through the connecting bracket 90, so that the clamping portion 81 can be clamped or separated from the transmission assembly 70. When the traction hook body 41 is in the locked state, the slider 612 slides to the end of the first inclined section 521 or the end of the second inclined section 523, the clamping portion 81 is separated from the transmission assembly 70, and the driving shaft 20 no longer drives the traction hook body 41 to rotate through the output shaft 80 and the transmission assembly 70, thereby facilitating the stability of the traction hook body 41 in the locked state. When the traction hook body 41 is in the unlocked state, the slider 612 slides to the horizontal section 522, the clamping portion 81 is clamped with the transmission assembly 70, and the driving shaft 20 can drive the traction hook body 41 to rotate through the output shaft 80 and the transmission assembly 70, thereby facilitating the switching of the traction hook body 41 between the two locked states.
[0055] Please refer to Figure 4 and Figure 6 In this embodiment, a plug hole 221 is provided at one end of the drive shaft 20 close to the output shaft 80, and an internal spline 222 is provided in the plug hole 221. The end of the output shaft 80 close to the drive shaft 20 is slidably inserted into the plug hole 221, and the end of the output shaft 80 close to the drive shaft 20 is provided with an external spline 83 that cooperates with the internal spline 222. In this way, the accuracy of the output shaft 80 moving relative to the drive shaft 20 driven by the connecting bracket 90 is improved, and the accuracy of the output shaft 80 rotating under the drive of the drive shaft 20 is improved.
[0056] In some other embodiments, a plug-in hole 221 may be opened at the end of the output shaft 80 close to the drive shaft 20, and an internal spline 222 may be set in the plug-in hole 221. Correspondingly, the end of the drive shaft 20 close to the output shaft 80 is slidably inserted into the plug-in hole 221, and an external spline 83 cooperating with the internal spline 222 is set at the end of the drive shaft 20 close to the output shaft 80. The embodiments of the present application do not specifically limit this.
[0057] In this embodiment, a limiting groove 82 is provided on the peripheral side of the output shaft 80, and the connecting bracket 90 is engaged with the limiting groove 82. In this way, the connecting bracket 90 can be limited to move along the axial direction of the output shaft 80, thereby facilitating the accuracy of the sliding member 61 driving the output shaft 80 to move through the connecting bracket 90.
[0058] Please refer again Figure 2 , Figure 3 and Figure 4In this embodiment, the transmission assembly 70 includes a ring gear 71, a sun gear 72 and a plurality of planetary gears 73. The ring gear 71 is connected to the traction hook body 41; the sun gear 72 is arranged in the middle of the ring gear 71, and a through hole 721 for receiving the clamping portion 81 is provided in the middle of the sun gear 72, a clamping groove 811 is provided on the peripheral side wall of the clamping portion 81, and a clamping block 722 for clamping with the clamping groove 811 is convexly provided on the inner wall of the through hole 721; a plurality of planetary gears 73 are evenly arranged around the sun gear 72, and each planetary gear 73 is meshed with the sun gear 72 and the ring gear 71 respectively.
[0059] Specifically, the ring gear 71 is connected to the inner wall of the mounting hole 411 opened in the traction hook body 41, the sun gear 72 is inserted in the bearing 13, and the plurality of planetary gears 73 are rotatably connected to one end of the fixing seat 11 away from the driving member 30. The slot 811 extends along the axial direction of the output shaft 80 and passes through the opposite sides of the clamping portion 81.
[0060] When the drive shaft 20 drives the traction hook body 41 to rotate through the output shaft 80 and the transmission assembly 70, the sliding member 61 drives the output shaft 80 to move through the connecting bracket 90, and the clamping portion 81 moves into the through hole 721, at which time the clamping groove 811 is clamped with the clamping block 722, and then the output shaft 80 drives the sun gear 72 to rotate, and the sun gear 72 drives the ring gear 71 to rotate through a plurality of planetary gears 73, and the ring gear 71 drives the traction hook body 41 to rotate. When the traction hook body 41 extends out of the vehicle body 200 or retracts to a position close to the vehicle body 200 and is in a locked state, the clamping portion 81 moves to the outside and inside of the sun gear 72 respectively and separates the clamping groove 811 from the clamping block 722. In this way, by providing the clamping groove 811 and the clamping block 722, it is convenient to clamp or separate the clamping portion 81 from the sun gear 72. In addition, by providing the transmission assembly 70 including the ring gear 71, the sun gear 72 and multiple planetary gears 73, it is helpful to improve the accuracy of the drive shaft 20 driving the traction hook body 41 to rotate through the output shaft 80 and the transmission assembly 70, and it is convenient to adjust the rotation speed of the traction hook body 41 relative to the drive shaft 20.
[0061] In some other embodiments, a slot 811 may be provided on the inner wall of the through hole 721, and correspondingly, a block 722 for engaging with the slot 811 may be provided on the peripheral side wall of the engaging portion 81. The present application does not specifically limit this.
[0062] In this embodiment, the size of the cross section of the slot 811 gradually increases from the middle of the slot 811 to both ends, and the size of the cross section of the block 722 gradually decreases from the middle of the block 722 to both ends. In this way, both ends of the slot 811 are dovetail-shaped, and both ends of the block 722 are triangles, so that the block 722 can be moved into or out of the slot 811 accurately.
[0063] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 In this embodiment, the driving shaft 20 includes a first driving section 21, a second driving section 22, a first reduction gear 23 and a plurality of second reduction gears 24. The driving member 30 is in driving connection with one end of the first driving section 21, and the driving seat 50 is fixedly sleeved on the first driving section 21; the first reduction gear 23 is arranged at one end of the first driving section 21 away from the driving member 30; the second driving section 22 is arranged at a side of the first driving section 21 away from the driving member 30, the sliding member 61 is slidably sleeved on the second driving section 22, and the traction hook body 41 is in driving connection with the second driving section 22; a plurality of second reduction gears 24 are arranged at one end of the second driving section 22 close to the first driving section 21, and the plurality of second reduction gears 24 are evenly arranged around the first reduction gear 23 and mesh with the first reduction gear 23.
[0064] Specifically, the plug hole 221 is opened at one end of the second driving section 22 away from the first driving section 21 , and the second driving section 22 is transmission-connected to the traction hook body 41 through the output shaft 80 , the sun gear 72 , a plurality of planetary gears 73 and the ring gear 71 .
[0065] By setting the drive shaft 20 to include the first drive section 21, the first reduction gear 23, the second drive section 22 and the plurality of second reduction gears 24, a differential function is realized between the first drive section 21 and the second drive section 22. Due to structural limitations, the rotation angle of the traction hook body 41 cannot be designed to be very large, that is, the rotation angle of the traction hook body 41 driven by the drive shaft 20 through the output shaft 80 and the sun gear 72 is relatively small, and the sliding member 61 needs the driving seat 50 to rotate a large angle from the unlocked state to the locked state of the traction hook body 41, so that the locking member 62 can be squeezed out to lock the traction hook body 41. For example, the traction hook body 41 rotates from the unlocked state to the locked state at an angle of 15°, and the sliding member 61 needs the driving seat 50 to rotate 60°, so that the locking member 62 can be squeezed out to lock the traction hook body 41. In this way, the design of the drive shaft 20 can make the rotation angle of the driving seat 50 and the rotation angle of the output shaft 80 different, ensuring that the locking member 62 can accurately lock the traction hook body 41.
[0066] In this embodiment, a bevel gear 211 is provided at one end of the first driving section 21 close to the driving member 30 , and the first driving section 21 is drivingly connected to the driving member 30 via the bevel gear 211 .
[0067] Please refer again Figure 2 In this embodiment, the traction mechanism 100 also includes a cover 42, which is arranged at one end of the mounting hole 411 away from the driving member 30. The cover 42 is used to shield the various components assembled in the mounting hole 411 to prevent dust and liquid from entering the mounting hole 411 and causing damage to the various components arranged in the mounting hole 411.
[0068] In summary, the traction mechanism 100 of the embodiment of the present application is provided with a fixing assembly 10, a drive shaft 20, a drive member 30, a drive seat 50, a sliding member 61 and a locking member 62. When the drive member 30 drives the drive shaft 20 to rotate forward or reverse, the drive seat 50 drives the sliding member 61 to move forward or backward along the axial direction of the drive shaft 20 through the first transmission part 51 and the second transmission part 611 under the drive of the drive shaft 20, and the locking member 62 is inserted into the traction hook body 41 through the through hole 112 to lock the traction hook body 41 when the drive shaft 20 drives the traction hook body 41 to rotate a preset angle, and when the traction hook body 41 needs to be unlocked, the locking member 62 is driven by the sliding member 61 to disengage from the traction hook body 41 to unlock. Since the locking member 62 is inserted into the traction hook body 41 with high accuracy under the drive of the sliding member 61, the fitting clearance can be minimized during design, and the locking member 62 is supported by the inner wall of the through hole 112 when locking the traction hook body 41, and the traction hook body 41 is supported by the peripheral side wall of the fixing component 10, so that the fitting clearance between the locking member 62 and the traction hook body 41 will not continue to increase, thereby improving the stability in the locked state and increasing the service life.
[0069] Please refer to Figure 8 The embodiment of the present application also provides a vehicle 1000, which includes a vehicle body 200 and the traction mechanism 100 as described above, and a fixing assembly 10 is connected to the vehicle body 200. Specifically, the mounting seat 12 of the fixing assembly 10 is connected to the rear of the vehicle body 200, thereby fixing the entire traction mechanism 100.
[0070] The vehicle 1000 of the embodiment of the present application improves the stability of the traction mechanism 100 in a locked state and increases the service life of the traction mechanism 100 by providing the traction mechanism 100 .
[0071] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.
[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.
Claims
1. A traction mechanism, characterized in that: include: A fixing component, wherein a receiving hole is provided in the middle of the fixing component, and a through hole communicating with the receiving hole is provided on a side wall of the fixing component; A driving shaft, which passes through the receiving hole and can rotate relative to the fixing assembly; A driving member, drivingly connected to one end of the driving shaft, and used to drive the driving shaft to rotate; A traction hook body, rotatably sleeved on the outer side of the fixed component and drivingly connected to the drive shaft, so as to rotate relative to the fixed component under the drive of the drive shaft; A driving seat, fixedly sleeved on the driving shaft and extending into the receiving hole at one end close to the driving member, wherein the driving seat has a first transmission part; and A locking assembly includes a sliding member and a locking member. The sliding member is slidably sleeved on the drive shaft and located in the receiving hole. The sliding member has a second transmission part that is slidably abutted against the first transmission part. The first transmission part and the second transmission part cooperate to make the sliding member slide along the axial direction of the drive shaft. The locking member is movably arranged on the sliding member and can move radially along the drive shaft. The locking member is used to insert into or disengage from the traction hook body through the through hole to put the traction hook body in a locked state or an unlocked state.
2. The traction mechanism according to claim 1, characterized in that: One of the first transmission part and the second transmission part is a guide groove, and the other of the first transmission part and the second transmission part is a sliding block extending into the guide groove.
3. The traction mechanism according to claim 2, characterized in that: The guide groove includes a first inclined section, a horizontal section and a second inclined section which are connected in sequence, the horizontal section is perpendicular to the axis of the drive shaft, the first inclined section and the second inclined section are parallel, and the angle between the first inclined section and the horizontal section and the angle between the second inclined section and the horizontal section are both obtuse angles of the same size.
4. The traction mechanism according to claim 3, characterized in that: An extrusion groove is provided on the peripheral side of the sliding member, and the groove walls on both sides of the extrusion groove respectively have a first extrusion slope and a second extrusion slope. The locking member is movably arranged in the extrusion groove and extends into the through hole. The first extrusion slope and the second extrusion slope are used to squeeze the locking member and insert it into the traction hook body so that the traction hook body is in a locked state.
5. The traction mechanism according to claim 4, characterized in that: The two ends of the locking member respectively have a first abutting inclined surface and a second abutting inclined surface matched with the first extrusion inclined surface and the second extrusion inclined surface.
6. The traction mechanism according to any one of claims 1 to 5, characterized in that: The traction mechanism also includes: A transmission assembly connected to the traction hook body; An output shaft is slidably disposed at an end of the drive shaft away from the drive member along the extension direction of the drive shaft, the output shaft can rotate under the drive of the drive shaft, and the end of the output shaft away from the drive shaft has a clamping portion for slidingly engaging with the transmission assembly; The connecting bracket is rotatably arranged on the output shaft and connected to the sliding member, and is used to drive the clamping part to separate from the transmission assembly in the locked state, and to drive the clamping part to clamp with the transmission assembly in the unlocked state.
7. The traction mechanism according to claim 6, characterized in that: The transmission assembly comprises: A gear ring connected to the traction hook body; A sun gear is arranged in the middle of the gear ring, a through hole for receiving the clamping portion is provided in the middle of the sun gear, a clamping groove is provided on one of the peripheral side wall of the clamping portion and the inner wall of the through hole, and a clamping block for clamping with the clamping groove is convexly provided on the other of the peripheral side wall of the clamping portion and the inner wall of the through hole; A plurality of planetary gears are evenly arranged around the sun gear, and each of the planetary gears is meshed with the sun gear and the ring gear respectively.
8. The traction mechanism according to claim 7, characterized in that: The size of the cross section of the card slot gradually increases from the middle of the card slot to both ends, and the size of the cross section of the card block gradually decreases from the middle of the card block to both ends.
9. The traction mechanism according to any one of claims 1 to 5, characterized in that: The drive shaft comprises: A first driving section, wherein the driving member is drivingly connected to one end of the first driving section, and the driving seat is fixedly sleeved on the first driving section; A first reduction gear, provided at an end of the first driving section away from the driving member; A second driving section is arranged on a side of the first driving section away from the driving member, the sliding member is slidably sleeved on the second driving section, and the traction hook body is drivingly connected to the second driving section; A plurality of second reduction gears are arranged at one end of the second driving section close to the first driving section. The plurality of second reduction gears are evenly arranged around the first reduction gear and mesh with the first reduction gear.
10. A vehicle, characterized in that: include: Vehicle body; According to any one of claims 1 to 9, the fixing assembly is connected to the vehicle body.