Gearbox and model vehicle

Abstract

The application discloses a gearbox and a model car, which comprises a box body, a gear shifting mechanism and a gear changing mechanism. The gear shifting mechanism comprises a power output shaft and a transmission shaft arranged on the box body. At least four driven wheels are arranged on the power output shaft and can rotate relative to the power output shaft. The rotating speed and / or rotating direction of any two driven wheels among the at least four driven wheels are different. The transmission shaft transmits power to drive the rotation of the driven wheels. Two driven wheels in each group are arranged along the axial direction of the power output shaft. The opposite surfaces of each group of driven wheels are respectively fixed with a follower rotor. The follower rotor is arranged on the power output shaft. A transmission rotor is arranged between each group of follower rotors. The transmission rotor is fixedly connected to the power output shaft. A moving ring is arranged on each transmission rotor. The gear changing mechanism is used to move the moving ring along the axial direction of the power output shaft on the transmission rotor to connect the transmission rotor and one follower rotor of the group of follower rotors. The gearbox has many variable gears.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of model cars, in particular to a gearbox and a model car. BACKGROUND

[0002] The model car is almost completely in accordance with the shape, structure and even interior components of the real car, and is strictly made in proportion to the vehicle model. Unlike ordinary toy cars, it has an engine, gearbox and other components like a real car.

[0003] Among them, the gearbox is also called the transmission, which is used to change the speed and torque from the engine, and it can fix or shift the input / output speed ratio. However, in the application field of model cars, the existing gearbox structure design is not rich enough, and the variable gear position is less. SUMMARY

[0004] The main purpose of the present application is to provide a gearbox, which aims to solve the technical problem of few variable gears of the current model car gearbox.

[0005] To achieve the above purpose, the gearbox provided by the present application comprises a gearbox body, a variable speed mechanism and a gear shifting mechanism.

[0006] The variable speed mechanism comprises a power output shaft and a transmission shaft arranged on the gearbox body, at least four driven wheels rotatable relative to the power output shaft are arranged on the power output shaft, the rotational speed and / or rotational direction of any two driven wheels of the at least four driven wheels are different, and the transmission shaft transmits power to rotate each driven wheel.

[0007] Two of the at least four driven wheels are arranged along the axial direction of the power output shaft in sequence, and each group of driven wheels has a follow-up rotor fixed on the opposite surface of the driven wheels, the follow-up rotor is arranged on the power output shaft, and a transmission rotor is arranged between each group of follow-up rotors, and the transmission rotor is fixedly connected to the power output shaft.

[0008] A moving ring is arranged on each transmission rotor, and the gear shifting mechanism is used to move the moving ring on the transmission rotor in the axial direction of the power output shaft to connect the transmission rotor and one of the follow-up rotors of the group of follow-up rotors.

[0009] Preferably, a plurality of first protrusions are arranged on the transmission rotor in sequence along the circumferential direction, a plurality of second protrusions are arranged on the follow-up rotor in sequence along the circumferential direction, and a plurality of embedding grooves corresponding to the plurality of first protrusions are arranged on the inner wall of the moving ring.

[0010] When the moving ring is arranged on the transmission rotor and the follow-up rotor, the plurality of embedding grooves are in clamping cooperation with the plurality of first protrusions and the plurality of second protrusions.

[0011] Preferably, the at least four driven wheels include a reversing driven wheel, a low-speed driven wheel, a medium-speed driven wheel and a high-speed driven wheel, the transmission shaft is provided with a reversing driving wheel, a low-speed driving wheel, a medium-speed driving wheel and a transmission wheel, and the speed change mechanism further comprises a reversing shaft arranged on the box body;

[0012] The reversing shaft is provided with an idler wheel engaged with the reversing driving wheel and the reversing driven wheel, the low-speed driving wheel is engaged with the low-speed driven wheel, the medium-speed driving wheel is engaged with the medium-speed driven wheel, and the transmission wheel is engaged with the high-speed driven wheel.

[0013] Preferably, the speed change mechanism further comprises a power input shaft arranged on the box body, and the power input shaft transmits power to the transmission shaft through a speed reduction transmission assembly.

[0014] Preferably, the speed reduction transmission assembly comprises a primary speed reduction driving wheel, a primary speed reduction driven wheel, a secondary speed reduction driving wheel and a secondary speed reduction driven wheel, and the speed change mechanism further comprises a mounting shaft arranged on the box body.

[0015] The primary speed reduction driving wheel is mounted on the power input shaft, the primary speed reduction driven wheel and the secondary speed reduction driving wheel are mounted on the mounting shaft.

[0016] The secondary speed reduction driven wheel is sleeved on the power output shaft and integrally arranged with the high-speed driven wheel, or the secondary speed reduction driven wheel is fixedly connected to the transmission shaft.

[0017] The primary speed reduction driving wheel is engaged with the primary speed reduction driven wheel, and the secondary speed reduction driving wheel is engaged with the secondary speed reduction driven wheel.

[0018] Preferably, the gear shifting mechanism comprises a first sliding rod, a first shift fork, a second sliding rod, a second shift fork and a shifting assembly.

[0019] The first sliding rod and the second sliding rod are slidably arranged side by side on the box body, the first shift fork is connected to the first sliding rod, the second shift fork is connected to the second sliding rod, the first shift fork and the second shift fork are respectively connected to a moving ring, and an annular groove is formed on the outer wall of the moving ring to form a plug-in fit with the plug-in part of the first shift fork or the second shift fork.

[0020] The shifting assembly is mounted on the box body, and the shifting assembly shifts the first sliding rod to slide in the forward and reverse directions to switch the position of the first shift fork, or shifts the second sliding rod to slide in the forward and reverse directions to switch the position of the second shift fork.

[0021] Preferably, a first slot is formed on the first slide rod, and a second slot is formed on the second slide rod, and the openings of the first slot and the second slot are opposite to each other.

[0022] The dialing assembly comprises a connecting seat, a connecting shaft and a rotating dialing rod, the connecting seat is fixed on the box body, the connecting shaft is arranged on the connecting seat, the connecting shaft can rotate around its axis or move along its axis, and the axial direction of the connecting shaft is perpendicular to the sliding directions of the first slide rod and the second slide rod.

[0023] The rotating dialing rod is arranged along the radial direction of the connecting shaft, one end of the rotating dialing rod is connected with the connecting shaft, and the other end of the rotating dialing rod is inserted into the first slot or / and the second slot along with the movement of the connecting shaft.

[0024] Preferably, the dialing assembly further comprises a transmission arm, a pushing piece and an elastic reset piece.

[0025] The transmission arm is connected with one end of the connecting shaft and is used for transmitting the rotation of the connecting shaft.

[0026] The pushing piece is abutted with the other end of the connecting shaft and is used for pushing the connecting shaft to move.

[0027] The elastic reset piece is abutted or connected with the connecting seat and the connecting shaft at two ends respectively and is used for resetting the movement of the connecting shaft.

[0028] Preferably, a transition hole, a first strip-shaped hole and a second strip-shaped hole arranged side by side are formed on the box body, the first strip-shaped hole and the second strip-shaped hole are communicated through the transition hole.

[0029] The first strip-shaped hole is positionally corresponding to the first slide rod, the extension direction of the first strip-shaped hole is the same as the sliding direction of the first slide rod, the second strip-shaped hole is positionally corresponding to the second slide rod, the extension direction of the second strip-shaped hole is the same as the sliding direction of the second slide rod, the rotating dialing rod passes through the transition hole, the rotating dialing rod can move between the first strip-shaped hole, the transition hole and the second strip-shaped hole, and can rotate along the first strip-shaped hole or the second strip-shaped hole.

[0030] The application further provides a model car, which comprises the transmission case.

[0031] The gearbox of the technical scheme runs, the transmission shaft of the transmission mechanism transmits power to make each driven wheel on the power output shaft rotate, and the follow-up rotor on each driven wheel rotates correspondingly. When the moving ring on the transmission rotor between each group of driven wheels is only sleeved on the transmission rotor, the power output shaft does not rotate, at this time it is neutral; through the shift mechanism, the moving ring between a group of driven wheels is moved to the transmission rotor along the axial direction of the power output shaft to connect the transmission rotor and one of the follow-up rotors of a group of follow-up rotors, the transmission rotor rotates with the follow-up rotor through the moving ring, and the transmission rotor further drives the power output shaft to rotate, thereby realizing the gear engagement operation. Among them, the rotational speed and / or rotational direction of any two driven wheels of the at least four driven wheels are different, and different driven wheels and the power output shaft form different gears when power transmission. The power output shaft is provided with at least four driven wheels, so the gearbox has at least four gears in addition to the neutral gear. It can be seen that the variable gear of the gearbox has many gears. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the gearbox in an embodiment of the present application;

[0033] Figure 2 It is Figure 1 It is a partial structural schematic diagram of the gearbox in an embodiment;

[0034] Figure 3 It is Figure 1 It is a structural schematic diagram of the speed reduction mechanism in an embodiment;

[0035] Figure 4 It is Figure 3 It is a partial structural schematic diagram of the speed reduction mechanism in an embodiment;

[0036] Figure 5 It is Figure 3 It is an exploded view of the partial structure of the speed reduction mechanism in an embodiment;

[0037] Figure 6 It is Figure 1 It is a structural schematic diagram of the shift mechanism in an embodiment;

[0038] Figure 7 It is Figure 6 It is a structural schematic diagram of the shift mechanism in another view in an embodiment;

[0039] Figure 8 It is Figure 6 It is a structural schematic diagram of the shift mechanism in another view in an embodiment;

[0040] Figure 9 It is Figure 6 It is a partial structural schematic diagram of the shift mechanism in an embodiment;

[0041] Figure 10 It is Figure 6An exploded view of a portion of the structure of the dial assembly in the embodiment. DETAILED DESCRIPTION

[0042] The embodiments of the present application will be described below in detail with reference to the drawings. Obviously, the embodiments described are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0043] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0044] It should also be noted that when an element is referred to as being “fixed” or “set” on another element, it can be directly on the other element or can have a middle element. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or can have a middle element.

[0045] In addition, the descriptions involving “first”, “second”, etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0046] The present application provides a gearbox, referring to Figures 1 to 3 The gearbox comprises a gearbox body 100, a gear shifting mechanism 200 and a gear shifting mechanism 300.

[0047] The gear shifting mechanism 200 comprises a power output shaft 210 and a transmission shaft 220 arranged on the gearbox body 100, at least four driven wheels are sleeved on the power output shaft 210 and can rotate relative to the power output shaft 210, the rotating speed and / or rotating direction of any two driven wheels of the at least four driven wheels are different, and the transmission shaft 220 transmits power to drive the driven wheels to rotate.

[0048] At least four driven wheels are arranged along the axial direction of the power output shaft 210 in two groups, and the opposite surfaces of each group of driven wheels are respectively fixed with a follow-up rotor 10, the follow-up rotor 10 is sleeved on the power output shaft 210, and a transmission rotor 20 is arranged between each group of follow-up rotors 10, and the transmission rotor 20 is fixedly connected to the power output shaft 210;

[0049] A moving ring 30 is sleeved on each transmission rotor 20, and the gear shifting mechanism 300 is used to move the moving ring 30 on the transmission rotor 20 in the axial direction of the power output shaft 210, so as to connect the transmission rotor 20 and one of the follow-up rotors 10 of the group of follow-up rotors 10.

[0050] The gearbox of the embodiment is applied to a model car, and mainly comprises a box body 100, a gear shifting mechanism 200 and a gear shifting mechanism 300. The box body 100 is a box structure and has an inner cavity. The power output shaft 210 and the transmission shaft 220 of the gear shifting mechanism 200 penetrate into the inner cavity of the box body 100 and are arranged on the box body 100, and the power output shaft 210 and the transmission shaft 220 are arranged in parallel and can rotate around their own axes. At least four driven wheels are sleeved on the power output shaft 210, and under the transmission of the transmission shaft 220, each driven wheel can rotate on the power output shaft 210. That is, in the specific arrangement, the transmission shaft 220 can be provided with rotating wheels connected to each driven wheel for power transmission. Figure 2 And Figure 3 The driven wheels on the power output shaft 210 are indicated by reference numerals 211, 212, 213 and 214, and the rotating wheels on the transmission shaft 220 are indicated by reference numerals 221, 222, 223 and 224. Further, the rotational speeds and / or rotation directions of any two driven wheels of the at least four driven wheels are different, for example, four driven wheels are provided, one of which has a different rotation direction from the other three driven wheels, and the rotational speeds of the other three driven wheels are low, medium and high respectively. Of course, this is only an example and is not limiting.

[0051] The at least four driven wheels are arranged in sequence on the power output shaft 210, and are arranged in two groups along the axial direction of the power output shaft 210, such as four driven wheels, the first two driven wheels being one group, and the last two driven wheels being one group. The opposite surfaces of each group of driven wheels are respectively fixed with a follower rotor 10, and the follower rotor 10 is sleeved on the power output shaft 210. The follower rotor 10 on each driven wheel can rotate with the driven wheel on the power output shaft 210. The two follower rotors 10 of a group of driven wheels correspond to a group of follower rotors 10, and a transmission rotor 20 is arranged between each group of follower rotors 10, and the transmission rotor 20 is fixedly connected to the power output shaft 210. A moving ring 30 is sleeved on the transmission rotor 20, and the moving ring 30 can move on the transmission rotor 20 under the actuation of a shifting mechanism 300 to connect the transmission rotor 20 and one of the follower rotors 10 of the group of follower rotors 10. The specific connection mode will be described in subsequent embodiments. The moving direction of the moving ring 30 is the axial direction of the power output shaft 210. It is easy to understand that the driven wheels rotate on the power output shaft 210, and under the control of the corresponding moving ring 30, when the follower rotor 10 of any driven wheel is connected with the transmission rotor 20, the transmission rotor 20 will rotate, thereby driving the power output shaft 210 to rotate. That is, the power transmission direction is transmission shaft 220-driven wheel-follower rotor 10-transmission rotor 20-power output shaft 210.

[0052] The shifting mechanism 300 is used to actuate the moving ring 30 on the transmission rotor 20 to move. For the moving rings 30 on the plurality of transmission rotors 20, the shifting mechanism 300 actuates the moving ring 30 on one of the transmission rotors 20 to move at a time. The shifting mechanism 300 actuates the moving ring 30 to move, and does not affect the rotation of the moving ring 30 when the moving ring 30 is connected with the transmission rotor 20 and the follower rotor 10. The structure of the shifting mechanism 300 can be various, such as the shifting mechanism 300 comprising a plurality of actuating members, each moving ring 30 corresponding to one of the actuating members, one end of the actuating member being provided with a U-shaped groove, the outer edge of the moving ring 30 being inserted into the U-shaped groove of the actuating member, and the actuating member being sleeved with the moving ring 30 through the U-shaped groove. Each actuating rod is slidingly arranged, and the actuating rod can be actuated by an external force to move the moving ring 30 along the axial direction of the power output shaft 210 by moving itself. Of course, this is only an example, and is not limiting. The shifting mechanism 300 can also have other structures, and the other structures will be further described in subsequent embodiments.

[0053] The shifting principle of the gearbox is as follows: when the moving ring 30 on the transmission rotor 20 between each group of driven wheels is only sleeved on the transmission rotor 20, the power output shaft 210 does not rotate, at this time, it is in neutral gear; through the shifting mechanism 300, the moving ring 30 between a group of driven wheels is moved on the transmission rotor 20 along the axial direction of the power output shaft 210 to connect the transmission rotor 20 and one of the driven rotors 10 of the group of driven rotors 10, the transmission rotor 20 rotates with the driven rotor 10 through the moving ring 30, the transmission rotor 20 in turn drives the power output shaft 210 to rotate, thereby realizing the gear shifting operation.

[0054] Among them, the rotating speed and / or rotating direction of any two driven wheels of the at least four driven wheels are different, and when the different driven wheels are connected with the power output shaft 210, different gears are correspondingly formed, the power output shaft 210 is provided with at least four driven wheels, so the gearbox has at least four gears in addition to the neutral gear. It can be seen that the variable gears of the gearbox are more.

[0055] In a preferred embodiment, referring to Figure 4 and Figure 5 The transmission rotor 20 is provided with a plurality of first protrusions 21 arranged in sequence along the circumferential direction thereof, the driven rotor 10 is provided with a plurality of second protrusions 11 arranged in sequence along the circumferential direction thereof, and the inner wall of the moving ring 30 is correspondingly provided with a plurality of embedding grooves 31 matched with the plurality of first protrusions 21;

[0056] When the moving ring 30 is sleeved on the transmission rotor 20 and the driven rotor 10, the plurality of embedding grooves 31 are in clamping cooperation with the plurality of first protrusions 21 and the plurality of second protrusions 11.

[0057] In this embodiment, when the moving ring 30 is only sleeved on the transmission rotor 20, i.e. in the initial position, the plurality of first protrusions 21 of the transmission rotor 20 are correspondingly located in the plurality of embedding grooves 31 of the moving ring 30 to form clamping cooperation. When the moving ring 30 moves along the axial direction of the power output shaft 210, the plurality of second protrusions 11 of the driven rotor 10 on the side of the moving direction of the moving ring 30 are in one-to-one butt joint with the plurality of first protrusions 21 of the transmission rotor 20. When the moving ring 30 moves to the position of the driven rotor 10 and is sleeved on the transmission rotor 20 and the driven rotor 10, the plurality of embedding grooves 31 of the moving ring 30 will also be in clamping cooperation with the plurality of second protrusions 11 of the driven rotor 10, i.e. the plurality of embedding grooves 31 are correspondingly in clamping cooperation with the plurality of first protrusions 21 and the plurality of second protrusions 11 in one-to-one butt joint, so that the transmission rotor 20 and the driven rotor 10 are relatively fixed, the structure is simple and the connection is stable. In this way, the moving ring 30 rotates with the driven rotor 10 to drive the transmission rotor 20 to rotate, and in turn drives the power output shaft 210 to rotate.

[0058] In addition, in other embodiments, the first embedding groove and the plurality of second embedding grooves can be respectively arranged on the driving rotor 20 and the driven rotor 10, and the inner wall of the moving ring 30 is correspondingly provided with a plurality of protruding parts matched with the plurality of first embedding grooves. The moving ring 30 is sleeved on the driving rotor 20 and the driven rotor 10, and the plurality of protruding parts can be correspondingly connected with the plurality of first embedding grooves and the second embedding grooves to form a clamping connection.

[0059] In a preferred embodiment, referring to Figure 2 and Figure 3 , the at least four driven wheels include a reversing driven wheel 211, a low-speed driven wheel 212, a medium-speed driven wheel 213 and a high-speed driven wheel 214, the driving shaft 220 is provided with a reversing driving wheel 221, a low-speed driving wheel 222, a medium-speed driving wheel 223 and a driving wheel 224, and the transmission mechanism 200 further includes a reversing shaft 230 arranged on the box body 100.

[0060] The reversing shaft 230 is provided with an idler wheel 231 engaged with the reversing driving wheel 211 and the reversing driven wheel 221, the low-speed driving wheel 222 is engaged with the low-speed driven wheel 212, the medium-speed driving wheel 223 is engaged with the medium-speed driven wheel 213, and the driving wheel 224 is engaged with the high-speed driven wheel 214.

[0061] In this embodiment, when the driving shaft 220 receives power transmission to rotate, the reversing driving wheel 221, the low-speed driving wheel 222, the medium-speed driving wheel 223 and the driving wheel 224 rotate with the driving shaft 220. The reversing driving wheel 221 rotates by engaging with the driving idler wheel 231, the driving idler wheel 231 in turn rotates by engaging with the reversing driven wheel 211, the low-speed driving wheel 222 rotates by engaging with the low-speed driven wheel 212, and the medium-speed driving wheel 223 rotates by engaging with the medium-speed driven wheel 213.

[0062] In the wheel set of the driving wheel 224 and the high-speed driven wheel 214, two setting forms can be adopted. The first setting form is that the driving wheel 224 is used as a high-speed driving wheel, the driving wheel 224 rotates with the driving shaft 220, and the driving wheel 224 rotates by engaging with the high-speed driven wheel 214. The second setting form is that power is transmitted into the high-speed driven wheel 214, the high-speed driven wheel 214 rotates by engaging with the driving wheel 224, and the driving wheel 224 in turn drives the driving shaft 220 to rotate. Either of the above two setting forms can be selected according to actual conditions, and the corresponding specific scheme is further described in subsequent embodiments.

[0063] Based on the above wheel set setting, when the reversing driven wheel 211 drives the power output shaft 210 to rotate, it is in the reverse gear, when the low-speed driven wheel 212 drives the power output shaft 210 to rotate, it is in the forward low-speed gear, when the medium-speed driven wheel 213 drives the power output shaft 210 to rotate, it is in the forward medium-speed gear, and when the high-speed driven wheel 214 drives the power output shaft 210 to rotate, it is in the forward high-speed gear.

[0064] In a preferred embodiment, referring to Figure 3 The power input shaft 240 is arranged on the box 100, and transmits power to the transmission shaft 220 through the speed reduction transmission assembly 250.

[0065] In this embodiment, the power input shaft 240 receives power input and rotates on the box 100, and transmits power to the transmission shaft 220 through the speed reduction transmission assembly 250, so as to rotate the transmission shaft 220. The speed reduction transmission assembly 250 can be a speed reduction gear set, and can be a one-stage speed reduction, a two-stage speed reduction, etc., which is arranged according to actual conditions.

[0066] In a preferred embodiment, referring to Figure 3 The speed reduction transmission assembly 250 includes a one-stage speed reduction driving wheel 251, a one-stage speed reduction driven wheel 252, a two-stage speed reduction driving wheel 253, and a two-stage speed reduction driven wheel 254. The transmission mechanism 200 further includes a mounting shaft 260 arranged on the box 100.

[0067] The one-stage speed reduction driving wheel 251 is mounted on the power input shaft 240, and the one-stage speed reduction driven wheel 252 and the two-stage speed reduction driving wheel 253 are mounted on the mounting shaft 260.

[0068] The two-stage speed reduction driven wheel 254 is sleeved on the power output shaft 210 and arranged integrally with the high-speed driven wheel 214, or is fixedly connected to the transmission shaft 220.

[0069] The one-stage speed reduction driving wheel 251 is engaged with the one-stage speed reduction driven wheel 252, and the two-stage speed reduction driving wheel 253 is engaged with the two-stage speed reduction driven wheel 254.

[0070] In this embodiment, the primary reduction driving wheel 251 rotates with the power input shaft 240 to engage and drive the primary reduction driven wheel 252 to rotate, and the secondary reduction driving wheel 253 rotates with the primary reduction driven wheel 252 to engage and drive the secondary reduction driven wheel 254 to rotate. The secondary reduction driven wheel 254 can be sleeved on the power output shaft 210 and integrally arranged with the high-speed driven wheel 214, and the high-speed driven wheel 214 rotates with the secondary reduction driven wheel 254 to engage and drive the transmission wheel 224 to rotate, and then drives the transmission shaft 220 to rotate through the transmission wheel 224. In this transmission arrangement, the high-speed driven wheel 214 and the transmission wheel 224 correspond to a tertiary reduction wheel set, i.e., the power input shaft 240 transmits power to the transmission shaft 220 through tertiary reduction. Alternatively, the secondary reduction driven wheel 254 can be fixedly connected to the transmission shaft 220 to directly drive the transmission shaft 220 to rotate through the secondary reduction driven wheel 254, i.e., the power input shaft 240 transmits power to the transmission shaft 220 through two-stage reduction. As an embodiment, the primary reduction driven wheel 252 and the secondary reduction driving wheel 253 can be integrally arranged.

[0071] In a preferred embodiment, referring to Figure 2 and Figure 6 , the shift mechanism 300 includes a first sliding rod 310, a first shift fork 320, a second sliding rod 330, a second shift fork 340, and a shifting assembly 350.

[0072] The first sliding rod 310 and the second sliding rod 320 are slidably arranged side by side on the box body 100, the first shift fork 320 is connected to the first sliding rod 310, the second shift fork 340 is connected to the second sliding rod 330, the first shift fork 320 and the second shift fork 340 are respectively connected to a moving ring 30, and the outer wall of the moving ring 30 is configured with an annular groove 32 that forms a plug-in fit with the plug-in part of the first shift fork 320 or the second shift fork 340.

[0073] The shifting assembly 350 is installed on the box body 100, and the shifting assembly 350 shifts the first sliding rod 310 to slide in the forward and reverse directions to switch the position of the first shift fork 320, or shifts the second sliding rod 330 to slide in the forward and reverse directions to switch the position of the second shift fork 340.

[0074] In the embodiment, the first slide rod 310 and the second slide rod 330 are slidingly arranged on the box body 100, and the sliding directions of the first slide rod 310 and the second slide rod 330 are consistent with the axial direction of the power output shaft 210. The first shift fork 320 is connected with the first slide rod 310, and the first shift fork 320 can move along with the first slide rod 310. The second shift fork 340 is connected with the second slide rod 330, and the second shift fork 340 can move along with the second slide rod 330. As an implementation, the first slide rod 310 is arranged on the box body 100 through a first mounting rod 360, and the second slide rod 330 is arranged on the box body 100 through a second mounting rod 370. The first slide rod 310 is sleeved on the first mounting rod 360, and first elastic members 1 are arranged between the two ends of the first slide rod 310 and the box body 100, respectively. The two ends of each first elastic member 1 are in abutment or connection with the first slide rod 310 and the box body 100, respectively. The second slide rod 330 is sleeved on the second mounting rod 370, and second elastic members 2 are arranged between the two ends of the second slide rod 330 and the box body 100, respectively. The two ends of each second elastic member 2 are in abutment or connection with the first slide rod 310 and the box body 100, respectively. The first elastic members 1 are used to make the first slide rod 310 be located at an initial position when the first slide rod 310 is not actuated by the actuating assembly 350. At this time, the moving ring 30 corresponding to the first shift fork 320 is only sleeved on the transmission rotor 20, and is not connected with the transmission rotor 20 and the follower rotor 10. The second elastic members 2 are used to make the second slide rod 330 be located at an initial position when the second slide rod 330 is not actuated by the actuating assembly 350. At this time, the moving ring 30 corresponding to the second shift fork 340 is only sleeved on the transmission rotor 20, and is not connected with the transmission rotor 20 and the follower rotor 10.

[0075] The insertion and mounting portions of the first shift fork 320 and the second shift fork 340 are in the shape of a circular arc, and the insertion and mounting portions of the first shift fork 320 or the second shift fork 340 are in insertion and mounting cooperation with the annular groove 32 of the moving ring 30. The first shift fork 320 and the second shift fork 340 can actuate the moving ring 30, and do not affect the rotation of the moving ring 30 along with the follower rotor 10.

[0076] The actuating assembly 350 is used to actuate the first slide rod 310 to slide in the forward and reverse directions, or to actuate the second slide rod 330 to slide in the forward and reverse directions. The structure of the actuating assembly 350 can be various, for example, the actuating assembly 350 includes two actuating rods, one actuating rod is connected with (connected, inserted or other forms) the first slide rod 310, and the other actuating rod is connected with (connected, inserted or other forms) the second slide rod 330. The two actuating rods are controlled respectively to correspondingly actuate the first slide rod 310 and the second slide rod 330 to slide in the forward and reverse directions. Of course, the structure of the actuating assembly 350 can also be other forms, and the other forms will be described in detail in subsequent embodiments.

[0077] The shift mechanism 300 shifts the position of the first shift fork 320 by shifting the first slide rod 310 in the forward and reverse directions to shift the position of the first shift fork 320, and then the first shift fork 320 shifts the corresponding moving ring 30 on the transmission rotor 20 in the axial direction of the power output shaft 210; and the shift mechanism 300 shifts the position of the second shift fork 340 by shifting the second slide rod 330 in the forward and reverse directions to shift the position of the second shift fork 340, and then the second shift fork 340 shifts the corresponding moving ring 30 on the transmission rotor 20 in the axial direction of the power output shaft 210.

[0078] In a preferred embodiment, referring to Figures 7 to 9 , a first slot 311 is formed on the first slide rod 310, and a second slot 331 is formed on the second slide rod 330, and the openings of the first slot 311 and the second slot 331 are opposite to each other;

[0079] The shifting assembly 350 includes a connecting seat 351, a connecting shaft 352, and a rotating shift rod 353. The connecting seat 351 is fixed on the box body 100, the connecting shaft 352 is arranged on the connecting seat 351, the connecting shaft 352 can rotate around its axis or move along its axis, and the axial direction of the connecting shaft 352 is perpendicular to the sliding direction of the first slide rod 310 and the second slide rod 330;

[0080] The rotating shift rod 353 is arranged in the radial direction of the connecting shaft 352, one end of the rotating shift rod 353 is connected to the connecting shaft 352, and the other end of the rotating shift rod 353 is inserted into the first slot 311 or / and the second slot 331 when the connecting shaft 352 moves.

[0081] In this embodiment, the extension direction of the first slot 311 and the second slot 331 is perpendicular to the sliding direction of the first slide rod 310 and the second slide rod 330, that is, consistent with the axial direction of the connecting shaft 352. In the shifting assembly 350, when the connecting shaft 352 moves on the connecting seat 351, the rotating shift rod 353 can move with it, and the other end of the rotating shift rod 353 moves between the first slot 311 and the second slot 331. In a specific arrangement, the slot width of the first slot 311 and the second slot 331 is greater than the rod width of the rotating shift rod 353, so that the rotating shift rod 353 has a certain movement allowance when it is inserted into the first slot 311 and the second slot 331. The rotation of the connecting shaft 352 can drive the rotating shift rod 353 to rotate, when the rotating shift rod 353 is inserted into the first slot 311, the rotation of the rotating shift rod 353 will shift the first slide rod 310 to slide, it is easy to understand that at this time the forward and reverse rotation of the rotating shift rod 353 corresponds to shifting the first slide rod 310 to slide in the forward and reverse directions, and the position of the first shift fork 320 is correspondingly switched. When the rotating shift rod 353 is inserted into the second slot 331, the rotation of the rotating shift rod 353 will shift the second slide rod 330 to slide, it is easy to understand that at this time the forward and reverse rotation of the rotating shift rod 353 corresponds to shifting the second slide rod 330 to slide in the forward and reverse directions, and the position of the second shift fork 340 is correspondingly switched.

[0082] That is, by controlling the movement of the connecting shaft 352 along its axis on the connecting seat 351, the rotating lever 353 can be inserted into the first slot 311 or the second slot 331, so as to realize the plug-in cooperation of the rotating lever 353 with the first slide rod 310 or the second slide rod 330; and by further controlling the rotation of the connecting shaft 352 around its axis on the connecting seat 351, the rotating lever 353 can be used to push the first slide rod 310 or the second slide rod 330 to slide, so as to correspondingly switch the position of the first fork 320 or the second fork 340.

[0083] In a preferred embodiment, referring to Figures 7 to 10 , the pushing assembly 350 further comprises a transmission arm 354, a pushing piece 355 and an elastic reset piece 356;

[0084] The transmission arm 354 is connected with one end of the connecting shaft 352, and is used to transmit the rotation of the connecting shaft 352;

[0085] The pushing piece 355 is in abutment with the other end of the connecting shaft 352, and is used to push the connecting shaft 352 to move;

[0086] The elastic reset piece 356 has two ends in abutment with or connected with the connecting seat 351 and the connecting shaft 352, and is used to reset the movement of the connecting shaft 352.

[0087] In the embodiment, the rotation of the transmission arm 354 can drive the connecting shaft 352 to rotate around its axis on the connecting seat 351. Specifically, one end of the transmission arm 354 is connected with the connecting shaft 352 through a screw, and the other end of the transmission arm 354 is a free end and can be connected with other structural members to realize the transmission during gear shifting. The pushing of the pushing piece 355 can make the connecting shaft 352 move along its axis on the connecting seat 351. The pushing piece 355 can have various structural forms, such as the pushing piece 355 comprising a rotating arm 355a, one end of the rotating arm 355a being rotatably connected with the box body 100, and an abutment portion 355b being formed on the rotating arm 355a and abutting against the other end of the connecting shaft 352. The pushing piece 355 adopts the structural design of the rotating arm 355a, one end of the rotating arm 355a being rotatably connected with the box body 100 so as to be rotatable on the box body 100. By rotating the rotating arm 355a, the abutment portion 355b on the rotating arm 355a can push the connecting shaft 352 to move. Of course, this is only exemplary and is not restrictive.

[0088] The elastic reset member 356 is arranged to reset the movement of the connecting shaft 352. Specifically, when the pushing member 355 pushes the connecting shaft 352 to move along the axis of the connecting seat 351, the elastic reset member 356 continuously increases the elastic force acting on the connecting shaft 352, and during the returning process of the pushing member 355, the elastic force acting on the connecting shaft 352 by the elastic reset member 356 resets the movement of the connecting shaft 352. The elastic reset member 356 can be arranged in various forms, and the number of the elastic reset member 356 can be selected according to the actual situation when arranged in different forms. As an optimization, referring to Figure 10 , the outer wall of the connecting shaft 352 is provided with a first step 352a, the inner wall of the shaft hole of the connecting seat 351 is provided with a second step 351a, and the elastic reset member 356 is a spring; the spring is sleeved on the connecting shaft 352 and located between the first step 352a and the second step 351a, one end of the spring abuts against the first step 352a, and the other end of the spring abuts against the second step 351a. Specifically, when the pushing member 355 pushes the connecting shaft 352 to move, the first step 352a compresses the spring located between the first step 352a and the second step 351a; and during the returning process of the pushing member 355, the elastic force of the spring acting on the first step 352a resets the movement of the connecting shaft 352. Preferably, the first step 352a and the second step 351a are annular steps, and are integrally formed with the connecting shaft 352 and the connecting seat 351, respectively.

[0089] In a preferred embodiment, referring to Figures 7 to 9 , the box body 100 is provided with a transition hole 101, and a first strip-shaped hole 102 and a second strip-shaped hole 103 arranged side by side, the first strip-shaped hole 102 and the second strip-shaped hole 103 are communicated through the transition hole 101;

[0090] The first strip-shaped hole 102 corresponds to the position of the first sliding rod 310, the extension direction of the first strip-shaped hole 102 is the same as the sliding direction of the first sliding rod 310, the second strip-shaped hole 103 corresponds to the position of the second sliding rod 330, the extension direction of the second strip-shaped hole 103 is the same as the sliding direction of the second sliding rod 330; the rotating lever 353 passes through the transition hole 101, the rotating lever 353 can move between the first strip-shaped hole 102, the transition hole 101 and the second strip-shaped hole 103, and can rotate along the first strip-shaped hole 102 or the second strip-shaped hole 103.

[0091] In the embodiment, the connecting seat 351 is arranged on the outer surface of the box body 100, the first slide rod 310 and the second slide rod 330 are located in the box body 100, the rotating lever 353 is arranged in the box body 100 through the transition hole 101 on the box body 100, and is inserted into the first slot 311 of the first slide rod 310 or the second slot 331 of the second slide rod 330. The first strip-shaped hole 102 and the second strip-shaped hole 103 are arranged side by side, the transition hole 101 is located between the first strip-shaped hole 102 and the second strip-shaped hole 103 and communicates the first strip-shaped hole 102 and the second strip-shaped hole 103, and the combination is in the shape of "H". Corresponding to the arrangement of the rotating lever 353, the rotating lever 353 is arranged in the transition hole 101, the rotating lever 353 is in the initial position, the rotating lever 353 is inserted into the first slot 311 and the second slot 331, and the two end side walls of the transition hole 101 limit the rotating lever 353 from rotating. With the movement of the connecting shaft 352, the rotating lever 353 can be moved from the transition hole 101 to the first strip-shaped hole 102, at the same time, the rotating lever 353 is inserted into the first slot 311 and can rotate with the connecting shaft 352, the rotating lever 353 rotates along the first strip-shaped hole 102 to drive the first slide rod 310 to slide; correspondingly, with the movement of the connecting shaft 352, the rotating lever 353 can also be moved from the transition hole 101 to the second strip-shaped hole 103, at the same time, the rotating lever 353 is inserted into the second slot 331 and can rotate with the connecting shaft 352, the rotating lever 353 rotates along the second strip-shaped hole 103 to drive the second slide rod 330 to slide. Further, the two end side walls of the first strip-shaped hole 102 and the two end side walls of the second strip-shaped hole 103 limit the rotation of the rotating lever 353, that is, the movement range of the first yoke 320 and the second yoke 340 is limited, and the position of the moving ring 30 is accurately switched.

[0092] The application also provides a model car comprising the gearbox described in the above embodiment, and the specific structure of the gearbox is referred to the above embodiment. Since the model car adopts all the technical solutions in the above embodiments, at least all the technical effects brought by the technical solutions in the above embodiments are achieved, and details are not described herein.

[0093] The above description is only some or preferred embodiments of the application, and neither the text nor the drawings can limit the protection scope of the application. Any equivalent structural transformation based on the content of the specification and drawings or direct / indirect application in other related technical fields is included in the protection scope of the application.

Claims

1. A gearbox, characterized in that The gearbox comprises a box body, a transmission mechanism and a gear shifting mechanism. The transmission mechanism comprises a power output shaft and a transmission shaft arranged on the box body, at least four driven wheels rotatable relative to the power output shaft are sleeved on the power output shaft, the rotational speed and / or rotational direction of any two driven wheels are different, and the transmission shaft transmits power to rotate each driven wheel. Two driven wheels in each group are arranged along the axial direction of the power output shaft, and the opposite surfaces of each group of driven wheels are respectively fixed with a follower rotor, the follower rotor is sleeved on the power output shaft, and a transmission rotor is arranged between each group of follower rotors, and the transmission rotor is fixedly connected to the power output shaft. A moving ring is sleeved on each transmission rotor, and the gear shifting mechanism is used to move the moving ring on the transmission rotor in the axial direction of the power output shaft to connect the transmission rotor and one follower rotor of the group of follower rotors. The gear shifting mechanism comprises a first sliding rod, a first shift fork, a second sliding rod, a second shift fork and a shifting assembly. The first sliding rod and the second sliding rod are slidably arranged side by side on the box body, the first shift fork is connected to the first sliding rod, the second shift fork is connected to the second sliding rod, the first shift fork and the second shift fork are respectively connected to a moving ring, and the outer wall of the moving ring is provided with an annular groove in plug-in cooperation with the plug-in part of the first shift fork or the second shift fork. The shifting assembly is installed on the box body, and the shifting assembly shifts the first sliding rod in the forward and reverse directions to switch the position of the first shift fork, or shifts the second sliding rod in the forward and reverse directions to switch the position of the second shift fork. The first sliding rod is provided with a first insertion slot, the second sliding rod is provided with a second insertion slot, and the openings of the first insertion slot and the second insertion slot are opposite. The shifting assembly comprises a connecting seat, a connecting shaft and a rotating shift lever, the connecting seat is fixed on the box body, the connecting shaft is arranged on the connecting seat, the connecting shaft can rotate around its axis or move along its axis, and the axial direction of the connecting shaft is perpendicular to the sliding direction of the first sliding rod and the second sliding rod. The rotating shift lever is arranged in the radial direction of the connecting shaft, one end of the rotating shift lever is connected to the connecting shaft, and the other end of the rotating shift lever moves into the first insertion slot or / and the second insertion slot along with the connecting shaft. The shifting assembly further comprises a transmission arm, a pushing piece and an elastic reset piece. The transmission arm is connected to one end of the connecting shaft for transmitting the rotation of the connecting shaft. The pushing piece is in abutment with the other end of the connecting shaft for pushing the connecting shaft to move. The elastic reset piece has two ends in abutment with or connected to the connecting seat and the connecting shaft respectively for resetting the movement of the connecting shaft. The pushing piece comprises a rotating arm, one end of the rotating arm is rotationally connected to the box body, the rotating arm is provided with an abutment portion in abutment with the other end of the connecting shaft, and the rotating arm pushes the connecting shaft to move in the rotating process through the abutment portion.

2. The gearbox according to claim 1, characterized in that The transmission rotor is provided with a plurality of first protrusions arranged in sequence along the circumference thereof, the follower rotor is provided with a plurality of second protrusions arranged in sequence along the circumference thereof, and the inner wall of the moving ring is provided with a plurality of embedding grooves corresponding to the plurality of first protrusions. When the moving ring is sleeved on the transmission rotor and the follower rotor, the plurality of embedding grooves are in clamping engagement with the plurality of first protrusions and second protrusions.

3. The gearbox of claim 1, wherein, The at least four driven wheels include a reversing driven wheel, a low-speed driven wheel, a medium-speed driven wheel and a high-speed driven wheel, the transmission shaft is provided with a reversing driving wheel, a low-speed driving wheel, a medium-speed driving wheel and a transmission wheel, and the transmission mechanism further includes a reversing shaft arranged on the box body. The reversing shaft is provided with an idler wheel in engagement with the reversing driving wheel and the reversing driven wheel, the low-speed driving wheel is in engagement with the low-speed driven wheel, the medium-speed driving wheel is in engagement with the medium-speed driven wheel, and the transmission wheel is in engagement with the high-speed driven wheel.

4. The gearbox of claim 3, wherein, The transmission mechanism further includes a power input shaft arranged on the box body, and the power input shaft transmits power to the transmission shaft through a speed reduction transmission assembly.

5. The gearbox of claim 4, wherein, The speed reduction transmission assembly includes a primary speed reduction driving wheel, a primary speed reduction driven wheel, a secondary speed reduction driving wheel and a secondary speed reduction driven wheel, and the transmission mechanism further includes a mounting shaft arranged on the box body. The primary speed reduction driving wheel is mounted on the power input shaft, the primary speed reduction driven wheel and the secondary speed reduction driving wheel are mounted on the mounting shaft. The secondary speed reduction driven wheel is sleeved on the power output shaft and integrally arranged with the high-speed driven wheel, or the secondary speed reduction driven wheel is fixedly connected to the transmission shaft. The primary speed reduction driving wheel is in engagement with the primary speed reduction driven wheel, and the secondary speed reduction driving wheel is in engagement with the secondary speed reduction driven wheel.

6. The gearbox of claim 1, wherein, The box body is provided with a transition hole, and a first strip-shaped hole and a second strip-shaped hole arranged side by side, and the first strip-shaped hole and the second strip-shaped hole are in communication through the transition hole. The first strip-shaped hole corresponds to the position of the first sliding rod, the extension direction of the first strip-shaped hole is the same as the sliding direction of the first sliding rod, the second strip-shaped hole corresponds to the position of the second sliding rod, and the extension direction of the second strip-shaped hole is the same as the sliding direction of the second sliding rod; the rotating lever passes through the transition hole, and the rotating lever can move between the first strip-shaped hole, the transition hole and the second strip-shaped hole, and can rotate along the first strip-shaped hole or the second strip-shaped hole.

7. A model vehicle, characterized by The transmission mechanism includes the transmission box according to any one of claims 1-6.

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