Novel gear shifting speed change device

Abstract

The invention relates to the technical field of vehicle speed changing systems, in particular to a novel gear shifting speed changing device which comprises a base, a first gear, a transmission assembly and a first rotating shaft arranged in the first direction, the transmission assembly comprises a transmission block, the transmission block and the first gear are sequentially arranged on the first rotating shaft in a sleeving mode in the first direction, and the first gear is rotationally connected to the base; the transmission block is connected to the first rotating shaft, so that the transmission block can move in the first direction, the transmission block and the first rotating shaft are in linkage in rotation, and the transmission block can be switched between the first transmission position and the free position by shifting the transmission block in the first direction. The transmission block and the first gear are in transmission connection through slope abutting, and when the transmission block is located at the free position, a gap is formed between the transmission block and the first gear; in conclusion, according to the novel gear shifting speed change device, gear engaging is conducted through abutting and friction of the inclined faces, no impact is generated in the gear engaging process, and damage to the transmission block and the gear is small.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle speed change systems, and in particular to a novel gear shifting device. Background Art

[0002] At present, the gear shifting device of a vehicle is mainly composed of a rotating shaft, a sleeve and a gear. The sleeve can rotate with the rotating shaft and can adjust its position along the axial direction of the rotating shaft. The axis of the gear and the axis of the rotating shaft are colinear. By adjusting the position of the sleeve along the axial direction of the rotating shaft, the teeth on the sleeve and the teeth on the gear are meshed, so that the gear transmission is connected to the rotating shaft. Further, by connecting different gear transmissions to the rotating shaft, the speed shifting function is realized. However, in the aforementioned speed change structure, since the sleeve and the gear are meshed at a certain speed, the two are prone to a large impact, which is easy to cause damage to the sleeve and the gear, and other components used to reduce or eliminate the impact caused by the impact will make the gear shifting device more complicated, reducing the compactness of the gear shifting device. Summary of the invention

[0003] The purpose of the present invention is to provide a new type of gear shifting device to solve the technical problem that in a general gear shifting device, the meshing of a sleeve and a gear will produce a large impact, which is easy to cause damage to the sleeve and the gear.

[0004] In order to achieve the above-mentioned objectives, the present invention provides a novel gear shifting device, comprising a base, a first gear, a transmission assembly and a first rotating shaft arranged along a first direction, the transmission assembly comprising a transmission block, the transmission block and the first gear are sleeved on the first rotating shaft, the first gear is located on one side of the transmission block along the first direction, the first gear is rotatably connected to the base, the transmission block is connected to the first rotating shaft, so that the transmission block can move along the first direction, and the transmission block and the first rotating shaft are linked in rotation, and the transmission block can be switched between a first transmission position and a free position by moving the transmission block along the first direction, when the transmission block is in the first transmission position, the transmission block and the first gear are connected by a bevel abutment transmission, and when the transmission block is in the free position, there is a gap between the transmission block and the first gear.

[0005] Optionally, the transmission block is provided with an outer conical surface at one end relative to the first gear, and the first gear is provided with a connecting hole relative to the side of the transmission block, and the connecting hole is provided with an inner conical surface. When the transmission block is located at the first transmission position, the outer conical surface abuts against the inner conical surface, so that the transmission block and the first gear are linked. When the transmission block is located in the free position, there is a gap between the outer conical surface and the inner conical surface.

[0006] Optionally, a connecting boss is fixedly provided on the side of the first gear away from the transmission block, and the connecting boss is provided with a through hole penetrating along the first direction, the through hole is connected to the connecting hole, the first rotating shaft passes through the connecting hole and the through hole, there is a gap between the first rotating shaft and the connecting hole, there is a gap between the first rotating shaft and the through hole, and the connecting boss is rotatably connected to the base.

[0007] Optionally, a friction ring is detachably mounted on one end of the transmission block relative to the first gear, the outer conical surface is arranged on the outer wall of the friction ring, the inner wall of the connecting hole is detachably mounted on a friction sleeve, and the inner conical surface is arranged on the inner wall of the friction sleeve.

[0008] Optionally, it also includes a second gear, which is sleeved on the first rotating shaft and rotatably connected to the base. The transmission block is located between the first gear and the second gear. Moving the transmission block along the first direction can also switch the transmission block to a second transmission position. When the transmission block is located at the second transmission position, the transmission block and the second gear are connected through a bevel abutment transmission connection. When the transmission block is in a free position, there is a gap between the transmission block and the second gear.

[0009] Optionally, the length of the transmission block along the first direction is smaller than the minimum distance between the first gear and the second gear.

[0010] Optionally, it also includes a second rotating shaft, a third gear and a fourth gear, the second rotating shaft is arranged parallel to the first rotating shaft, the third gear and the fourth gear are sequentially sleeved on the second rotating shaft along the first direction, and are transmission-connected to the second rotating shaft, the third gear is meshingly connected to the first gear, and the fourth gear is meshingly connected to the second gear.

[0011] Optionally, the transmission assembly further includes a rotating sleeve, the rotating sleeve is rotatably connected to the outer side wall of the transmission block, and the rotating sleeve and the transmission block move in linkage in the first direction.

[0012] Optionally, the transmission assembly also includes a toggle rod and a toggle frame, the toggle frame is arranged on the base at the outer wall of the rotating sleeve, the toggle frame is provided with an adjustment long hole radially extending along the first rotating shaft, the adjustment long hole extends along the first direction, one end of the toggle rod is fixedly connected to the outer wall of the rotating sleeve, and the other end passes through the adjustment long hole.

[0013] Optionally, the rotating sleeve includes a fixed convex plate, a cover plate, two movable convex plates and a plurality of ball bearings, the fixed convex plate fixing ring is arranged on the side wall of the transmission block, the movable convex plate is sleeved on the outer side of the transmission block, the two movable convex plates are respectively located on both sides of the fixed convex plate along the first direction, the two side rings of the fixed convex plate relative to the first direction are provided with a first rolling groove, the movable convex plate is provided with a second rolling groove corresponding to the first rolling groove relative to the side of the fixed convex plate, and the plurality of ball bearings are movably arranged between the first rolling groove and the second rolling groove, the cover plate is arranged on the outer sides of the fixed convex plate and the movable convex plate, the inner side wall of the cover plate is provided with a receiving groove, and the two side groove walls of the receiving groove are located on both sides of the two movable convex plates along the first direction, and the cover plate is moved to make the groove wall of the receiving groove abut against the movable convex plate, thereby making the transmission block move along the first direction.

[0014] Compared with the prior art, the novel gear shifting device according to the embodiment of the present invention has the following beneficial effects:

[0015] In the novel gear shifting device of the present invention, the transmission block and the first gear are both sleeved on the first rotating shaft, wherein the first gear is rotatably connected to the base, the rotation of the first rotating shaft cannot directly act on the first gear, and the transmission block is connected to the first rotating shaft, so that the transmission block can move in the first direction, and the transmission block and the first rotating shaft are also linked in rotation, that is, the transmission block can rotate with the rotation of the first rotating shaft, further, the transmission block can be moved by external force to move it in the first direction, and then it can be switched between the first transmission position and the free position, wherein, when the transmission block is in the free position, there is a gap between the transmission block and the first gear, and there is no connection relationship between the transmission block and the first gear, and when the transmission block is in the first transmission position, the transmission block and the first gear are connected through The inclined surface abuts the transmission connection. Specifically, in the process that the transmission block gradually approaches the first transmission position until it is located at the first transmission position, the distance between the transmission block and the first gear gradually decreases to zero, and the inclined surface of the transmission block and the inclined surface of the first gear rub against each other, so that the rotation speed of the first gear gradually increases and finally becomes the same as the rotation speed of the transmission block. At this time, the position of the transmission block in the axial direction is fixed or an external force toward the first gear is continuously applied to the transmission block, so that the inclined surface of the transmission block is firmly abutted against the inclined surface of the first gear, so that the first rotating shaft is transmission-connected to the first gear, thereby realizing the gear-engaging function in the gear shifting device. In summary, the new gear shifting device of the present invention relies on inclined surface abutment and friction to engage in gear engagement, and will not generate any impact during the gear engagement process, with little damage to the transmission block and the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the novel gear shifting device of the present invention.

[0017] Figure 2It is a front view of the novel gear shifting device of the present invention.

[0018] Figure 3 It is a top view of the novel gear shifting device of the present invention.

[0019] Figure 4 for Figure 3 Sectional view of AA.

[0020] Figure 5 for Figure 4 A partial enlarged view of part B in the middle.

[0021] Figure numerals: 1. base; 2. first rotating shaft; 3. second rotating shaft; 4. first gear; 41. connecting hole; 5. second gear; 6. third gear; 7. fourth gear; 8. transmission assembly; 81. transmission block; 82. rotating sleeve; 821. fixed convex plate; 822. movable convex plate; 823. cover plate; 824. ball bearing; 83. toggle rod; 84. toggle frame; 841. adjusting long hole; 9. connecting boss; 91. through hole; 10. friction ring; 20. friction sleeve. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] like Figures 1 to 5As shown, a novel gear shifting device of the present invention comprises a base 1, a first gear 4, a transmission assembly 8 and a first rotating shaft 2 arranged along a first direction, the transmission assembly 8 comprises a transmission block 81, the transmission block 81 and the first gear 4 are sleeved on the first rotating shaft 2, the first gear 4 is located on one side of the transmission block along the first direction, the first gear 4 is rotatably connected to the base 1, the transmission block 81 is connected to the first rotating shaft 2, so that the transmission block 81 can move along the first direction, and the transmission block 81 and the first rotating shaft 2 are linked in rotation, and the transmission block 81 is moved along the first direction to switch between the first transmission position and the free position, when the transmission block 81 is located at the first transmission position, the transmission block 81 and the first gear 4 are connected by a bevel abutment transmission, and when the transmission block 81 is located at the free position, there is a gap between the transmission block 81 and the first gear 4.

[0026] In the above technical scheme, the transmission block 81 and the first gear 4 are both sleeved on the first rotating shaft 2, wherein the first gear 4 is rotatably connected to the base 1, and the rotation of the first rotating shaft 2 cannot directly act on the first gear 4. The transmission block 81 is connected to the first rotating shaft 2, so that the transmission block 81 can move in the first direction, and the transmission block 81 and the first rotating shaft 2 are linked in rotation, that is, the transmission block 81 can rotate with the rotation of the first rotating shaft 2. Further, an external force can be used to move the transmission block 81 in the first direction, so as to switch it between the first transmission position and the free position. When the transmission block 81 is in the free position, there is a gap between the transmission block 81 and the first gear 4, and there is no connection relationship between the transmission block 81 and the first gear 4. When the transmission block 81 is in the first transmission position, the transmission block 81 and the first gear 4 are connected by abutment transmission via an inclined surface. Specifically, when the transmission block 81 gradually approaches In the process of approaching the first transmission position until being in the first transmission position, the distance between the transmission block 81 and the first gear 4 gradually decreases to zero, and the inclined surface of the transmission block 81 and the inclined surface of the first gear 4 rub against each other, so that the rotation speed of the first gear 4 gradually increases and finally becomes the same as the rotation speed of the transmission block 81. At this time, the transmission block 81 is fixed in the axial position or an external force toward the first gear 4 is continuously applied to the transmission block 81, so that the inclined surface of the transmission block 81 is firmly abutted against the inclined surface of the first gear 4, so that the first rotating shaft 2 is transmission-connected to the first gear 4, realizing the gear-engaging function in the gear shifting device; in summary, the new gear shifting device of the present invention relies on the abutment and friction of the inclined surfaces to engage in gears, and no impact will be generated during the gear engaging process, and the damage to the transmission block 81 and the gears is small; in addition, the torque transmitted between the first rotating shaft 2 and the first gear 4 depends on the angle of the inclined surface, the friction coefficient of the inclined surface and the area of ​​the abutting inclined surfaces, etc.

[0027] in, Figures 1 to 4In order to show the structure clearly, a part of the structure of the base 1 is ignored to expose the upper part where the first connecting shaft and the second connecting shaft are connected to the base 1.

[0028] Furthermore, the outer side wall of the first rotating shaft 2 is fixedly provided with a plurality of connecting keys extending along the first direction, and the inner side wall of the transmission block 81 is provided with a plurality of key slots penetrating along the first direction, the connecting keys and the key slots correspond one to one, the connecting keys are slidably connected to the key slots along the first direction, and the inner side wall of the transmission block 81 is slidably connected to the outer side wall of the first rotating shaft 2 along the first direction.

[0029] Furthermore, in order to facilitate manufacturing and ensure the connection strength, the transmission block 81 is provided with an outer conical surface at one end relative to the first gear 4, and the first gear 4 is provided with a connecting hole 41 on the side of the transmission block 81, and the connecting hole 41 is provided with an inner conical surface. When the transmission block 81 is located in the first transmission position, the outer conical surface abuts against the inner conical surface, so that the transmission block 81 and the first gear 4 are linked. When the transmission block 81 is located in the free position, there is a gap between the outer conical surface and the inner conical surface; specifically, the outer conical surface is provided at the edge of one end of the first gear 4, and the connecting hole 41 is a conical hole, and its inner wall surface is an inner conical surface.

[0030] Furthermore, a connecting boss 9 is fixedly provided on the side of the first gear 4 away from the transmission block 81, and the connecting boss 9 is provided with a through hole 91 penetrating along the first direction, and the through hole 91 is connected to the connecting hole 41. The first rotating shaft 2 passes through the connecting hole 41 and the through hole 91, and there is a gap between the first rotating shaft 2 and the connecting hole 41, and there is a gap between the first rotating shaft 2 and the through hole 91. The connecting boss 9 is rotatably connected to the base 1 to facilitate the installation of the first gear 4 and to avoid the first rotating shaft 2 directly affecting the first gear 4.

[0031] Furthermore, the transmission block 81 is detachably provided with a friction ring 10 at one end relative to the first gear 4, the outer conical surface is provided on the outer side wall of the friction ring 10, the inner side wall of the connecting hole 41 is detachably provided with a friction sleeve 20, and the inner conical surface is provided on the inner side wall of the friction sleeve 20. When the conical surface is worn to a certain extent, it can be restored to use by replacing the friction ring 10 and the friction sleeve 20 without replacing the entire transmission block 81 and the entire gear, so as to reduce the cost of use.

[0032] Furthermore, it also includes a second gear 5, which is sleeved on the first rotating shaft 2, and the second gear 5 is rotatably connected to the base 1. The transmission block 81 is located between the first gear 4 and the second gear 5. Moving the transmission block 81 along the first direction can also switch the transmission block 81 to a second transmission position. When the transmission block 81 is located at the second transmission position, the transmission block 81 and the second gear 5 are transmission connected by an inclined surface abutment. When the transmission block 81 is in a free position, there is a gap between the transmission block 81 and the second gear 5, so that the transmission block 81 can be connected to different gears by moving in opposite directions, thereby realizing gear shifting. Furthermore, the transmission ratios of the first gear 4 and the second gear 5 connected to another rotating shaft are different.

[0033] Furthermore, the length of the transmission block 81 along the first direction is smaller than the minimum distance between the first gear 4 and the second gear 5, so that the structure of the gear shifting device is more compact and the gear shifting time can be reduced.

[0034] Furthermore, it also includes a second rotating shaft 3, a third gear 6 and a fourth gear 7, the second rotating shaft 3 is arranged parallel to the first rotating shaft 2, the third gear 6 and the fourth gear 7 are sequentially sleeved on the second rotating shaft 3 along the first direction, and are transmission-connected to the second rotating shaft 3, the third gear 6 is meshedly connected to the first gear 4, and the fourth gear 7 is meshedly connected to the second gear 5, so that the first rotating shaft 2 can be transmission-connected to different gears through the transmission block 81, and different torques are output to the second rotating shaft 3; specifically, when the transmission block 81 is in the free position, Position, there is no transmission relationship between the first shaft 2 and the second shaft 3. When the transmission block 81 is located at the first transmission position, the torque is transmitted to the first shaft 2, the transmission block 81, the first gear 4, the third gear 6 and the second shaft 3 in sequence (it can also be transmitted along the opposite path). When the transmission block 81 is located at the second transmission position, the torque is transmitted to the first shaft 2, the transmission block 81, the second gear 5, the fourth gear 7 and the second shaft 3 in sequence (it can also be transmitted along the opposite path), wherein the transmission ratio of the first gear 4 and the third gear 6 is different from the transmission ratio of the second gear 5 and the third gear 6.

[0035] Further explanation is as follows: when the transmission block 81 is located at the first transmission position, the first shaft 2 is sequentially linked to the transmission block 81, the first gear 4, the third gear 6, the second shaft 3, the fourth gear 7 and the second gear 5; when the transmission block 81 is located at the second transmission position, the first shaft 2 is sequentially linked to the second shaft 3, the fourth gear 7, the second shaft 3, the third gear 6 and the second gear 5. Further, when the transmission block 81 moves from the first transmission position to the second transmission position, the state in which the transmission block 81 abuts against the first gear 4 changes to a free state, and then changes to a state in which the transmission block 81 abuts against the second gear 5. The aforementioned process is a gear shifting process (the reverse process is also a gear shifting process); during the gear shifting process, when the transmission block 81 changes from the abutting state to the free state, In the state, although the first gear 4, the second gear 5, the third gear 6, the fourth gear 7 and the second shaft 3 will lose power temporarily, resulting in a decrease in speed, since the length of the transmission block 81 along the first direction is less than the minimum distance between the first gear 4 and the second gear 5, the time for the transmission block 81 to move between the first transmission position and the second transmission position can be quite short and the speed is quite fast. Therefore, when the speed of each gear does not drop to a large extent, the transmission block 81 can move to another transmission position and abut against the gear. Since at this time, the abutting gears still have a certain speed, the transmission block 81 and the gear can be quickly rotated synchronously, and the degree of friction between the friction ring 10 and the friction sleeve 20 can be greatly reduced, thereby increasing the service life of the two.

[0036] Furthermore, the transmission assembly 8 also includes a rotating sleeve 82, which is rotatably connected to the outer wall of the transmission block 81, and the rotating sleeve 82 and the transmission block 81 are linked in movement in the first direction, and the transmission block 81 can be moved in the first direction by moving the sleeve along the first direction.

[0037] Furthermore, the transmission assembly 8 also includes a toggle rod 83 and a toggle frame 84. The toggle frame 84 is arranged on the base 1 at the outer wall of the rotating sleeve 82. The toggle frame 84 is provided with an adjustment long hole 841 that passes through the radial direction of the first rotating shaft 2. The adjustment long hole 841 extends along the first direction. One end of the toggle rod 83 is fixedly connected to the outer wall of the rotating sleeve 82, and the other end passes through the adjustment long hole 841. The toggle rod 83 extends from the outer wall of the rotating sleeve 82 to facilitate the toggle device to be toggled. The adjustment long hole 841 of the toggle frame 84 can prevent the toggle rod 83 from rotating with the rotation of the transmission block 81, thereby preventing a collision between the toggle device and the toggle rod 83.

[0038] Furthermore, the rotating sleeve 82 includes a fixed convex plate 821, a cover plate 823, two movable convex plates 822 and a plurality of ball bearings 824, the fixed convex plate 821 is fixedly ringed on the side wall of the transmission block 81, the movable convex plate 822 is sleeved on the outer side of the transmission block 81, the two movable convex plates 822 are respectively located on both sides of the fixed convex plate 821 along the first direction, the fixed convex plate 821 is provided with a first rolling groove on two side faces relative to the first direction, the movable convex plate 822 is provided with a second rolling groove corresponding to the first rolling groove relative to the side face of the fixed convex plate 821, the plurality of ball bearings 824 are movably arranged between the first rolling groove and the second rolling groove, the cover plate 823 is provided to cover the fixed convex plate 821 and the movable convex plate The outer side of the plate 822 and the inner side wall of the cover plate 823 are provided with a receiving groove, and the two side groove walls of the receiving groove are located on the two sides of the two movable protrusions 822 along the first direction. The cover plate 823 is moved to make the groove wall of the receiving groove abut against the movable protrusion 822, thereby making the transmission block 81 move along the first direction, wherein, when a force along the first direction is applied to the cover plate 823, the force is transmitted to the cover plate 823, the movable protrusion 822, the ball 824, the fixed protrusion 821 and the transmission block 81 in sequence, so that the transmission block 81 moves along the first direction, wherein the ball 824 is used to reduce the circumferential friction force transmitted from the fixed protrusion 821 to the movable protrusion 822, which can effectively reduce the influence of the rotation of the transmission block 81 on the movable protrusion 822 and the cover plate 823.

[0039] Furthermore, the specific connection methods of fixed setting and fixed connection refer to the relative position relationship of two components that can be fixedly connected, including fixing by connecting parts, fixing by welding, fixing by adhesives, fixing by integral molding, and fixing by snap connections.

[0040] Furthermore, the specific connection method of the detachable connection refers to that the two connected parts can be disassembled and assembled repeatedly and multiple times without being damaged or seriously deformed, including fixation by a connecting piece and fixation by a snap connection.

[0041] Furthermore, a sliding connection refers to two connected components where one component can slide on the other component along a fixed track, including connection by sliding a slider into a slide groove, and connection by inserting a slide rod into a hole that matches the slide rod size profile.

[0042] Furthermore, the rotational connection refers to the ability of two connected parts to rotate, including connection through bearings and connection through clearance fit.

[0043] Furthermore, the connecting parts include fasteners, straps, ties, pneumatic connecting elements, hydraulic connecting elements, flange plates, Velcro, and buttons.

[0044] In summary, the embodiment of the present invention provides a novel gear shifting device, and its technical effects are as follows:

[0045] In the novel gear shifting device of the present invention, the transmission block 81 and the first gear 4 are both sleeved on the first rotating shaft 2, wherein the first gear 4 is rotatably connected to the base 1, and the rotation of the first rotating shaft 2 cannot directly act on the first gear 4. The transmission block 81 is connected to the first rotating shaft 2, so that the transmission block 81 can move along the first direction, and the transmission block 81 and the first rotating shaft 2 are linked in rotation, that is, the transmission block 81 can rotate with the rotation of the first rotating shaft 2. Further, the transmission block 81 can be moved by external force to move it along the first direction, thereby switching it between the first transmission position and the free position. When the transmission block 81 is in the free position, there is a gap between the transmission block 81 and the first gear 4, and there is no connection relationship between the transmission block 81 and the first gear 4. When the transmission block 81 is in the first transmission position, the transmission block 81 and the first gear 4 are not connected. A gear 4 is connected through a bevel abutment transmission connection. Specifically, in the process of the transmission block 81 gradually approaching the first transmission position until it is located at the first transmission position, the distance between the transmission block 81 and the first gear 4 gradually decreases to zero, and the bevel of the transmission block 81 and the bevel of the first gear 4 rub against each other, so that the rotation speed of the first gear 4 gradually increases and finally becomes the same as the rotation speed of the transmission block 81. At this time, the transmission block 81 is fixed in the axial position or an external force toward the first gear 4 is continuously applied to the transmission block 81, so that the bevel of the transmission block 81 is firmly abutted against the bevel of the first gear 4, so that the first rotating shaft 2 is transmission-connected to the first gear 4, thereby realizing the gear-engaging function in the gear shifting device. In summary, the new gear shifting device of the present invention relies on bevel abutment and friction to engage in gears, and no impact is generated during the gear engaging process, and the damage to the transmission block 81 and the gears is small.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A new type of gear shifting device, characterized in that: The invention comprises a base (1), a first gear (4), a transmission assembly (8) and a first rotating shaft (2) arranged along a first direction, wherein the transmission assembly (8) comprises a transmission block (81), the transmission block (81) and the first gear (4) are sleeved on the first rotating shaft (2), the first gear (4) is located on one side of the transmission block along the first direction, the first gear (4) is rotatably connected to the base (1), the transmission block (81) is connected to the first rotating shaft (2), so that the transmission block (81) can move along the first direction, and the transmission block (81) and the first rotating shaft (2) are linked in rotation, and the transmission block (81) can be switched between a first transmission position and a free position by shifting the transmission block (81) along the first direction, when the transmission block (81) is located at the first transmission position, the transmission block (81) and the first gear (4) are connected in transmission through an inclined surface abutment, and when the transmission block (81) is located at the free position, there is a gap between the transmission block (81) and the first gear (4).

2. The novel gear shifting device according to claim 1 is characterized in that: An outer conical surface is provided at one end of the transmission block (81) relative to the first gear (4); a connecting hole (41) is provided at a side surface of the transmission block (81); and an inner conical surface is provided at the connecting hole (41); when the transmission block (81) is located at the first transmission position, the outer conical surface abuts against the inner conical surface, so that the transmission block (81) and the first gear (4) are linked; when the transmission block (81) is located at a free position, a gap is provided between the outer conical surface and the inner conical surface.

3. The novel gear shifting device according to claim 2 is characterized in that: A connecting boss (9) is fixedly provided on the side of the first gear (4) away from the transmission block (81); the connecting boss (9) is provided with a through hole (91) penetrating along the first direction; the through hole (91) is connected to the connecting hole (41); the first rotating shaft (2) passes through the connecting hole (41) and the through hole (91); there is a gap between the first rotating shaft (2) and the connecting hole (41); there is a gap between the first rotating shaft (2) and the through hole (91); the connecting boss (9) is rotatably connected to the base (1).

4. The novel gear shifting device according to claim 2 is characterized in that: A friction ring (10) is detachably mounted on one end of the transmission block (81) relative to the first gear (4), the outer conical surface is arranged on the outer side wall of the friction ring (10), and a friction sleeve (20) is detachably mounted on the inner side wall of the connection hole (41), and the inner conical surface is arranged on the inner side wall of the friction sleeve (20).

5. The novel gear shifting device according to claim 1 is characterized in that: The invention also comprises a second gear (5), wherein the second gear (5) is sleeved on the first rotating shaft (2), and the second gear (5) is rotatably connected to the base (1); the transmission block (81) is located between the first gear (4) and the second gear (5); the transmission block (81) can be switched to a second transmission position by moving the transmission block (81) along the first direction; when the transmission block (81) is located at the second transmission position, the transmission block (81) and the second gear (5) are connected in transmission via an inclined surface abutment; when the transmission block (81) is located at a free position, there is a gap between the transmission block (81) and the second gear (5).

6. The novel gear shifting device according to claim 5 is characterized in that: The length of the transmission block (81) along the first direction is smaller than the minimum distance between the first gear (4) and the second gear (5).

7. The novel gear shifting device according to claim 5, characterized in that: The invention also comprises a second rotating shaft (3), a third gear (6) and a fourth gear (7); the second rotating shaft (3) is arranged parallel to the first rotating shaft (2); the third gear (6) and the fourth gear (7) are sequentially sleeved on the second rotating shaft (3) along the first direction and are transmission-connected to the second rotating shaft (3); the third gear (6) is meshingly connected to the first gear (4); and the fourth gear (7) is meshingly connected to the second gear (5).

8. The novel gear shifting device according to claim 1 is characterized in that: The transmission assembly (8) further comprises a rotating sleeve (82), wherein the rotating sleeve (82) is rotatably connected to the outer side wall of the transmission block (81), and the rotating sleeve (82) and the transmission block (81) move in conjunction with each other in the first direction.

9. The novel gear shifting device according to claim 8 is characterized in that: The transmission assembly (8) further comprises a toggle rod (83) and a toggle frame (84); the toggle frame (84) is arranged on the base (1) at a distance from the outer wall of the rotating sleeve (82); the toggle frame (84) is provided with an adjustment long hole (841) penetrating along the radial direction of the first rotating shaft (2); the adjustment long hole (841) extends along the first direction; one end of the toggle rod (83) is fixedly connected to the outer wall of the rotating sleeve (82), and the other end passes through the adjustment long hole (841).

10. The novel gear shifting device according to claim 8, characterized in that: The rotating sleeve (82) comprises a fixed convex plate (821), a cover plate (823), two movable convex plates (822) and a plurality of ball bearings (824); the fixed convex plate (821) is fixedly mounted on the side wall of the transmission block (81); the movable convex plate (822) is sleeved on the outer side of the transmission block (81); the two movable convex plates (822) are respectively located on both sides of the fixed convex plate (821) along the first direction; the fixed convex plate (821) is provided with first rolling grooves on two side faces relative to the first direction; the movable convex plate (822) is arranged relative to the fixed convex plate (821) ) is provided with a second rolling groove corresponding to the first rolling groove on the side thereof, a plurality of the balls (824) are movably arranged between the first rolling groove and the second rolling groove, the cover plate (823) is arranged to cover the outer sides of the fixed protrusion plate (821) and the movable protrusion plate (822), the inner side wall of the cover plate (823) is provided with a receiving groove, the two side groove walls of the receiving groove are located on the two sides of the two movable protrusion plates (822) along the first direction, and the cover plate (823) is moved to make the groove wall of the receiving groove abut against the movable protrusion plate (822), thereby causing the transmission block (81) to move along the first direction.

Images