CN212709814U - Transmission assembly and electric vehicle - Google Patents

Abstract

The utility model provides a drive assembly and electric motor car relates to non-motor technical field. The transmission assembly comprises a base; the transmission mechanism is connected with the base and comprises a first transmission piece and a second transmission piece which can be relatively far away from and close to each other; the separating and combining assembly comprises a first component and a second component, the first component is connected with the first transmission piece, and the second component is connected with the second transmission piece; the first component and the second component move in parallel under the driving of the first transmission piece and the second transmission piece so as to be relatively far away from and close to each other. The utility model discloses a drive assembly can promote the foldability of vehicle.

Description

Transmission assembly and electric vehicle

Technical Field

The utility model belongs to the technical field of the non-motor vehicle, more specifically relates to a transmission assembly and electric motor car.

Background

The wheels of the related foldable electric vehicle are fixed relative to the vehicle body, so that the foldability of the vehicle body is limited; other related foldable electric vehicles have independent wheels, and have insufficient compactness and aesthetic appearance, thereby affecting the foldability of the vehicle.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a transmission assembly and electric motor car to solve the technical problem who how to promote the foldability of vehicle.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a transmission component, which comprises a base; the transmission mechanism is connected with the base and comprises a first transmission piece and a second transmission piece which can be relatively far away from and close to each other; the separation and combination assembly comprises a first component and a second component, the first component is connected with the first transmission piece, and the second component is connected with the second transmission piece; the first component and the second component move in parallel under the driving of the first transmission piece and the second transmission piece so as to relatively move away from and approach to each other.

Furthermore, the transmission mechanism also comprises a synchronous movement mechanism which is connected with the base and can move relative to the base; the synchronous movement mechanism comprises a first movement part and a second movement part which move along opposite directions; the first moving part is connected with the first transmission part, and the second moving part is connected with the second transmission part.

Further, the synchronous movement mechanism further comprises a sliding block which can move relative to the base; the first moving piece and the second moving piece are connecting rods which are connected with the sliding block in a rotatable mode.

Further, the first transmission piece comprises a first transmission link and a first guide link; one end of the first transmission connecting rod is rotatably connected with the first moving part, and the other end of the first transmission connecting rod is rotatably connected with the first part; one end of the first guide connecting rod is rotatably connected with the base, and the other end of the first guide connecting rod is rotatably connected with the first component; the second transmission part comprises a second transmission connecting rod and a second guide connecting rod; one end of the second transmission connecting rod is rotatably connected with the second moving part, and the other end of the second transmission connecting rod is rotatably connected with the second part; one end of the second guide connecting rod is rotatably connected with the base, and the other end of the second guide connecting rod is rotatably connected with the second part; wherein, first transmission connecting rod and second transmission connecting rod all with the base is rotatable is connected.

Further, the transmission mechanism further comprises a screw rod connected with the base, and the surface of the screw rod is provided with threads; the first transmission piece and the second transmission piece are both nuts which are sleeved on the screw rod and are in threaded connection with the screw rod, and the thread rotating direction of the first transmission piece is opposite to the thread rotating direction of the second transmission piece; the first component is connected with the first transmission piece, and the second component is connected with the second transmission piece.

Further, a first sliding groove and a second sliding groove are arranged on the base and distributed at intervals, a first protrusion is arranged on the surface of the first component far away from the second component, a second protrusion is arranged on the surface of the second component far away from the first component, the first protrusion is used for moving along the first sliding groove, and the second protrusion is used for moving along the second sliding groove; the base is further provided with a third sliding groove and a fourth sliding groove which are distributed at intervals, one end of the screw rod can move along the third sliding groove, and the other end of the screw rod can move along the fourth sliding groove.

Further, the first moving part and the second moving part are a first gear and a second gear which are meshed with each other, and the diameters and the number of teeth of the first gear and the second gear are the same; the first transmission piece is a first rack meshed with the first gear, and the second transmission piece is a second rack meshed with the second gear.

Further, a first notch piece and a second notch piece which are distributed at intervals are arranged on the base, the first notch piece is used for the first component to pass through so as to guide the moving direction of the first component, and the second notch piece is used for the second component to pass through so as to guide the moving direction of the second component.

Further, the transmission mechanism further comprises a guide mechanism which comprises a first guide piece and a second guide piece which are distributed at intervals; the first guide is connected with the first component and the base to guide the moving direction of the first component; the second guide is coupled to the second member and the base to guide a moving direction of the second member.

An electric vehicle includes a first wheel and a second wheel that are separable and combinable; the transmission assembly of any of the above; the first component is a first rear fork connected with a first wheel, and the second component is a second rear fork connected with a second wheel.

The utility model provides a pair of transmission assembly includes base, drive mechanism and deciliter subassembly. Through set up drive mechanism at the transmission assembly, drive mechanism has first driving medium and the second driving medium that can keep away from relatively and be close to, and first driving medium, second driving medium can drive the first part, the second part of the deciliter subassembly of being connected with it and keep away from and be close to in parallel relatively. The utility model discloses a transmission assembly passes through drive mechanism and realizes keeping away from and being close to that first part, second part are parallel to when first part, second part are the part of vehicle, can realize the separation and the merge of the part of vehicle, effectively promoted the foldability of vehicle.

Drawings

Fig. 1a is a schematic structural diagram of a transmission assembly according to an embodiment of the present invention in an operating state;

fig. 1b is a schematic structural diagram of the transmission assembly according to the embodiment of the present invention in another working state;

FIG. 2 is a schematic diagram of a transmission assembly according to an embodiment of the present invention;

FIG. 3a is a schematic structural view of another transmission assembly;

FIG. 3b is a schematic structural view of another transmission assembly;

FIG. 4 is a schematic structural view of another transmission assembly;

fig. 5 is a schematic perspective view of another transmission assembly.

Description of reference numerals:

1-a base, 11-a first runner, 12-a second runner, 13-a third runner, 14-a fourth runner, 15-a first notch member, 16-a second notch member, 2-a transmission mechanism, 211-a first transmission member, 2111-a first transmission link, 2112-a first guide link, 2113-a first rack, 212-a second transmission member, 2121-a second transmission link, 2122-a second guide link, 2123-a second rack, 22-a synchronous motion mechanism, 221-a first motion member, 2211-a first gear, 222-a second motion member, 2221-a second gear, 223-a slider, 23-a screw, 3-a split-and-combine assembly, 31-a first component, 311-a first projection, 32-a second component, 321-a second projection, o ' -a centre line of symmetry of the slide in the vertical direction, S-a centre line of symmetry of the principle sketch, theta-an angle between the connecting rod of the first moving member and the connecting rod of the second moving member, theta ' -a maximum angle between the connecting rod of the first moving member and the connecting rod of the second moving member, theta ' ″ -a minimum angle between the connecting rod of the first moving member and the connecting rod of the second moving member, v-a velocity of the first projection, v-a center line of symmetry of the slide in the vertical direction₁A velocity component, v, of the first projection in the vertical direction₂-the velocity component of the first protrusion in the horizontal direction, -v-the velocity of the second protrusion, v₁-the velocity component of the second protrusion in the vertical direction, -v₂-the velocity component of the second protrusion in the horizontal direction

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The individual features described in the embodiments can be combined in any suitable manner without departing from the scope, for example different embodiments and aspects can be formed by combining different features. In order to avoid unnecessary repetition, various combinations of the specific features of the present invention are not described separately.

In the following description, the term "first/second/so" is used merely to distinguish different objects and does not mean that there is a common or relationship between the objects. It should be understood that the references to "above" and "below" are to be interpreted as referring to the orientation during normal use.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "coupled", where not otherwise specified, includes both direct and indirect connections.

The embodiment of the utility model provides a pair of transmission assembly and electric motor car, it can regard as transmission system to be applied to in the collapsible car, can also be applied to in the mechanical equipment who has transmission system. It should be noted that the application scenario type in the present invention is not limited to the transmission assembly of the present invention. The following description will be given taking an example in which the transmission assembly is applied to an electric vehicle.

In the embodiment of the present invention, as shown in fig. 1a, the transmission assembly includes a base 1, a transmission mechanism 2, and a separation and combination assembly 3. The base 1 is stationary, for example the base 1 is an integral part of a vehicle frame. The transmission mechanism 2 is connected with the base 1, and the transmission mechanism 2 comprises a first transmission piece 211 and a second transmission piece 212 which can be relatively far away and close. Specifically, the first transmission member 211 and the second transmission member 212 can move relative to the base 1, respectively, as shown in fig. 1a, the first transmission member 211 and the second transmission member 212 are in a relatively far state, and as shown in fig. 1b, the first transmission member 211 and the second transmission member 212 are in a relatively close state. The combining and separating assembly 3 includes a first member 31 and a second member 32, the first member 31 is connected to the first transmission member 211, and the second member 32 is connected to the second transmission member 212. Specifically, the clutch assembly 3 may be a first rear fork and a second rear fork in an electric vehicle, that is, the first component 31 and the second component 32, the first rear fork may be connected to a first wheel, and the second rear fork may be connected to a second wheel. The first member 31 and the second member 32 are disposed at an interval and have their longitudinal extension directions parallel to each other. The term "spaced" means that the two members are not in close contact with each other, but have a gap therebetween. The first member 31 may move with the movement of the first transmission member 211, and the second member 32 may move with the movement of the second transmission member 212. The first member 31 and the second member 32 move in parallel to move away from and close to each other by the first transmission piece 211 and the second transmission piece 212. The parallel motion means that the first member 31 and the second member 32 do not rotate relative to each other, the motion trajectories of the first member 31 and the second member 32 are straight lines, the straight lines are parallel to each other, and the first member 31 and the second member 32 do not displace relative to each other in the vertical direction (the vertical direction shown in fig. 1a and 1 b). Specifically, during the process that the first member 31 and the second member 32 move along with the first transmission piece 211 and the second transmission piece 212, the first member 31 and the second member 32 always keep relatively parallel movement, and the first member 31 and the second member 32 do not move relatively in the vertical direction (the up-down direction shown in fig. 1a and 1 b), and always keep synchronization, that is, the first member 31 and the second member 32 do not have relative change of distance in the vertical direction. The first part 31 and the second part 32 are relatively movable only in the horizontal direction (the left-right direction as viewed in fig. 1a and 1 b), that is, the first part 31 and the second part 32 are relatively increased or decreased in distance in the horizontal direction, that is, relatively far apart and close together. Since the longitudinal extension directions of the first member 31 and the second member 32 are parallel to each other, the first member 31 and the second member 32 can move away from and close to each other in parallel without an angle caused by relative movement therebetween. The first transmission piece 211 and the second transmission piece 212 can also limit the first component 31 and the second component 32 from moving away and approaching infinitely.

The utility model discloses drive mechanism 2 and deciliter subassembly 3's arrangement mode can also have other concrete implementation mode. For example, the transmission mechanism 2 shown in fig. 3a and 3b comprises a first transmission piece 211 and a second transmission piece 212 that can be relatively far apart and close together. The first transmission piece 211 and the second transmission piece 212 move relatively in the horizontal direction shown in fig. 3a and 3b to move away from and close to each other, thereby moving the first member 31 and the second member 32 away from and close to each other in the horizontal direction shown in fig. 3a and 3 b. For another example, the transmission mechanism 2 shown in fig. 4 and 5 includes a first transmission member 211 and a second transmission member 212 that can be relatively distant and close. The first transmission piece 211 and the second transmission piece 212 move along different oblique line directions in a vertical plane shown in fig. 4, so as to be relatively far away from and close to each other, and further drive the first component 31 and the second component 32 to move in a vertical direction shown in fig. 4, so as to be far away from and close to each other in a horizontal direction.

The embodiment of the utility model provides a through set up drive mechanism at drive assembly, drive mechanism has the first driving medium and the second driving medium that can keep away from relatively and be close to, and first driving medium, second driving medium can drive keeping away from and being close to of the relative parallel of the first part, the second part of being connected with it. The utility model discloses a transmission assembly passes through drive mechanism and realizes keeping away from and being close to that first part, second part are parallel, has promoted the foldability of vehicle on the one hand, and the separation and the mergence of wheel can also be realized to first part of on the other hand, second part, has further optimized the folding space of automobile body.

In some embodiments, as shown in fig. 1a and 1b, the transmission mechanism 2 further comprises a synchronous movement mechanism 22 connected to the base 1 and capable of moving relative to the base 1; the synchronous moving mechanism 22 includes a first moving member 221 and a second moving member 222 that move in opposite directions; the first moving member 221 is connected to the first transmission member 211, and the second moving member 222 is connected to the second transmission member 212, so as to drive the first transmission member 211 and the second transmission member 212 to move away from and close to each other. Specifically, the first moving member 221 and the second moving member 222 with the same moving speed and opposite moving directions can drive the first transmission member 211 and the second transmission member 212 connected thereto to generate the movement with the same moving speed and opposite moving directions. Furthermore, the first component 31 and the second component 32 can also generate movements with the same movement speed and opposite movement directions under the driving of the first transmission piece 211 and the second transmission piece 212 so as to keep relatively parallel far and close. The first moving piece and the second moving piece which have the same moving speed and opposite moving directions are arranged, so that the step-by-step transmission of power is effectively realized; and the first moving member and the second moving member can be relatively far away and close, so that the foldability of the vehicle is further optimized.

In other embodiments, the synchronous motion mechanism 22 has additional specific components and arrangements. As shown in fig. 4 and 5, the synchronous moving mechanism 22 includes a first moving member 221 and a second moving member 222 that move in opposite directions; the first moving member 221 is connected to the first transmission member 211, and the second moving member 222 is connected to the second transmission member 212, so as to drive the first transmission member 211 and the second transmission member 212 to move away from and close to each other. Specifically, the first moving member 221 and the second moving member 222 rotate in opposite directions at the same speed, so as to drive the first transmission member 211 and the second transmission member 212 to move away from and close to each other at the same speed relative to the symmetry axes of the two members.

In some embodiments, as shown in fig. 1a and 1b, the synchronous moving mechanism 22 further comprises a slider 223 capable of moving relative to the base 1. Specifically, the sliding block 223 may be a substantially cubic structure, and has a symmetric center line O 'in a vertical direction (the up-down direction shown in fig. 1 b), and the sliding block 223 makes a reciprocating linear motion in a certain range along the symmetric center line O', as shown in fig. 1b, a position where the sliding block 223 stays is an upper limit of a motion range, which is hereinafter referred to as a top dead center, and as shown in fig. 1a, a position where the sliding block 223 stays is a lower limit of the motion range, which is hereinafter referred to as a bottom dead center. The first and second moving members 221 and 222 are links each rotatably connected to the slider 223 to rotate in opposite directions at the same rate by the slider 223. Specifically, the first moving member 221 and the second moving member 222 are symmetrically disposed about the symmetry center line O ', and both are rotatably connected to the slider 223 so as to move along the symmetry center line O' under the driving of the slider 223, and meanwhile, the first moving member 221 and the second moving member 222 rotate relative to the slider 223 within a certain range by taking the connection point as the rotation center and moving at opposite directions and same speed, so that the included angle θ between the first moving member 221 and the second moving member 222 is increased or decreased, that is, the first moving member 221 and the second moving member 222 move away from and close to each other relatively. In the process of moving the slider 223 from the top dead center to the bottom dead center, an included angle θ between the first moving member 221 and the second moving member 222 gradually increases, that is, the first moving member 221 and the second moving member 222 move relatively far away, and when the slider 223 moves to the bottom dead center, the included angle θ between the first moving member 221 and the second moving member 222 reaches a maximum value θ', that is, the state of the first moving member 221 and the second moving member 222 shown in fig. 1 a; during the movement of the slider 223 from the bottom dead center to the top dead center, the angle θ between the first moving member 221 and the second moving member 222 gradually decreases, the first moving member 221 and the second moving member 222 exhibit relatively close movement, and when the slider 223 moves to the top dead center, the angle θ between the first moving member 221 and the second moving member 222 reaches the minimum value θ' ″, i.e., the state of the first moving member 221 and the second moving member 222 as shown in fig. 1 b.

The synchronous movement mechanism is provided with the sliding block and the two connecting rods, and the sliding block drives the two connecting rods to keep the same movement with opposite directions and same speed; and the transmission mode of combining the sliding block and the connecting rod has simple structure and better foldability.

In some embodiments, as shown in fig. 1a and 1b, the first transmission 211 includes a first transmission link 2111 and a first guide link 2112; one end of the first transmission link 2111 is rotatably connected to the first mover 221, and the other end of the first transmission link 2111 is rotatably connected to the first member 31; one end of the first guide link 2112 is rotatably connected to the base 1, and the other end is rotatably connected to the first member 31; the second transmission member 212 includes a second transmission link 2121 and a second guide link 2122; one end of the second transmission link 2121 is rotatably connected to the second moving element 222, and the other end of the second transmission link 2121 is rotatably connected to the second member 32; the second guide link 2122 has one end rotatably connected to the base 1 and the other end rotatably connected to the second member 32. The first transmission link 2111 and the second transmission link 2121 are both rotatably connected to the base 1. Specifically, since the first moving member 221 and the second moving member 222 are both configured as a link, in order to facilitate structural matching of the components, the first transmission member 211 and the second transmission member 212 are also configured in a link manner and are symmetrically disposed about the center line of symmetry O'. The first transmission link 2111, the second transmission link 2121, and the first guide link 2112, the second guide link 2122 are symmetrically disposed about the center line O'. The first guide link 2112 and the first transmission link 2111 are spaced apart from each other and have substantially the same extending direction, and similarly, the second guide link 2122 and the second transmission link 2121 are spaced apart from each other and have substantially the same extending direction. One end of the first transmission link 2111 and one end of the second transmission link 2121 are rotatably connected to the base 1, the other end of the first transmission link 2111 and the other end of the second transmission link 2121 are rotatably connected to the first member 31 and the second member 32, the one end of the first moving element 221 and one end of the second moving element 222 are rotatably connected to the other end of the first transmission link 2111 and the other end of the second transmission link 2121, and the other end of the first moving element 221, the other end of the second moving element 222 and the slider 223 are connected to form the aforementioned rotation center and are rotatable around the rotation center. One end of the first guide link 2112 and one end of the second guide link 2122 are rotatably connected to the base 1, and the other end of the first guide link 2112 and the other end of the second guide link 2122 are rotatably connected to the first member 31 and the second member 32, respectively.

For the purpose of illustration and understanding of the movement of the entire linkage, the description is continued using a schematic diagram as shown in fig. 2. The four hinged supports (W1, W2, W3 and W4) shown in fig. 2 are fixed supports, which are equivalent to the base 1 in this embodiment, and W1, W2, W3 and W4 are arranged around a symmetric center line S, which is equivalent to the symmetric center line O' in this embodiment, and the mass M is equivalent to the slider 223 in this embodiment, and makes a reciprocating linear motion within a certain range only along the direction of the symmetric center line S. The line segments PM and QM correspond to the first moving element 221 and the second moving element 222, respectively, in the present embodiment, the line segments PW2 and QW4 correspond to the first transmission link 2111 and the second transmission link 2121, respectively, the line segments UW1 and VW3 correspond to the first guide link 2112 and the second guide link 2122, respectively, and the line segments UP and VQ correspond to the first component 31 and the second component 32, respectively, in the present embodiment. Wherein, the line segment UW1 is parallel to the line segment PW2, the line segment UP is parallel to the line segment W1W2, the line segment VW3 is parallel to the line segment QW4, the line segment VQ is parallel to the line segment W3W4, the line segment UP is also parallel to the line segment VQ, namely, four points of UW 1W 2P form a parallelogram, four points of VQW4W3 form another parallelogram, and the two quadrangles are symmetrical about the symmetrical center line S. Particle M moves to M ', particles U, P, V and Q move to U ', P, ' V ' and Q ', respectively, four points U ' W1W 2P ' still maintain a parallelogram, V ' Q ' W4W3 still maintains a parallelogram, and line segment U ' P ' remains parallel to line segment V ' Q '. The segment U 'P' and the segment V 'Q' can be kept parallel no matter where the mass point M is located in the motion range of the mass point M in the direction of the symmetrical center line S.

According to the above-described schematic illustration, in the present embodiment, as shown in fig. 1a and 1b, the slider 223 can always keep the lengthwise extending direction of the first member 31 parallel to the lengthwise extending direction of the second member 32 during the reciprocating movement along the center line of symmetry O', and can always keep the first member 31 and the second member 32 without relative movement in the vertical direction, and only the horizontal direction relative distance and approach, that is, the first member 31 and the second member 32 keep the relative parallel distance and approach movement.

The first transmission connecting rod, the second transmission connecting rod, the first guide connecting rod and the second guide connecting rod are arranged, so that the first component and the second component keep relatively parallel to move away from and close to each other; and all the connecting rod parts can rotate and move away from and close to each other, so that the folding flexibility of the vehicle is further improved.

In other embodiments, the transmission 2 may have other specific compositions and arrangements. As shown in fig. 3a and 3b, the transmission mechanism 2 further includes a screw 23 connected to the base 1, and a surface of the screw 23 is provided with a thread. In particular, the screw 23 can be connected with the base 1 directly or indirectly. The screw 23 is a rod with a thread on the surface, including a screw rod, etc., and the thread may have a triangular, trapezoidal, rectangular, saw-tooth, and circular arc shape. The screw 23 can rotate relative to the base 1, the screw 23 can be an integrated screw, or can be assembled by two screws, for a simplified structure, the integrated screw is provided in the exemplary embodiment, and opposite ends of the screw 23 have threads with opposite rotation directions. The first transmission piece 211 and the second transmission piece 212 are both nuts sleeved on the screw 23 and in threaded connection with the screw 23, and the thread rotation direction of the first transmission piece 211 is opposite to the thread rotation direction of the second transmission piece 212. Specifically, the first transmission member 211 is a nut engaged with a thread at one end of the screw 23, and the first transmission member 211 can rotate relative to the screw 23; the second transmission member 212 is a nut engaged with the other end of the screw 23, and the second transmission member 212 is rotatable relative to the screw 23. The two nuts have threads with opposite directions of rotation. When the screw 23 rotates, the two nuts will move relative to the screw 23, and because the two ends of the screw 23 have threads with opposite turning directions, the two nuts can generate translational motions with opposite directions and same speed along the length extension direction of the screw 23, namely, the two nuts move away from and close to each other relatively. The first member 31 is connected to the first transmission member 211, and the second member 32 is connected to the second transmission member 212. Specifically, the first component 31 and the second component 32 are fixedly connected with the first transmission piece 211 and the second transmission piece 212 correspondingly, and can horizontally move along with the horizontal movement of the first transmission piece 211 and the second transmission piece 212, so that the first component 31 and the second component 32 can relatively move away from and close to each other.

The screw rod and the two nuts are arranged on the transmission mechanism, the first component and the second component are fixedly connected to the nuts, and the first component and the second component generate relative movement through the relative movement of the nuts and the screw rod. The screw and nut combined transmission mode has the advantages of stable structure and long service life of the transmission assembly.

Specifically, in some embodiments, as shown in fig. 3a, the screw 23 is disposed in a sleeve, the sleeve is fixedly connected to the base 1, and the screw 23 rotates relative to the sleeve. The relative movement of the nut and the screw 23, which brings the first and second members 31, 32 into the horizontal direction relative movement shown in fig. 3a, does not change the vertical position of the first and second members 31, 32 relative to the base 1.

In other embodiments, as shown in fig. 3b, the screw 23 is arranged in a sleeve, which is slidable relative to the base 1, and the screw 23 is rotatable relative to the sleeve. The vertical positions of the first and second members 31, 32 relative to the base 1 will also change during the relative movement of the first and second members 31, 32 by the relative movement of the nut and the screw 23. Specifically, the base 1 is provided with a first sliding groove 11 and a second sliding groove 12 which are distributed at intervals, a first protrusion 311 is provided on a surface of the first member 31 away from the second member 32, a second protrusion 321 is provided on a surface of the second member 32 away from the first member 31, the first protrusion 311 is configured to move along the first sliding groove 11, and the second protrusion 321 is configured to move along the second sliding groove 12. It should be noted that the first member 31 and the second member 32 have opposite surfaces which are oppositely arranged and spaced apart from each other, that is, a surface of the first member 31 which is away from the second member 32 and a surface of the second member 32 which is away from the first member 31, on the opposite side of the opposite surfaces, that is, a left surface of the first member 31 and a right surface of the second member 32 shown in fig. 3. The specific positions of the first protrusion 311 and the second protrusion 321 may be set according to circumstances, and may be set at positions close to the free end of the first member 31 and the free end of the second member 32, as shown in fig. 3 b. Specifically, the first protrusion 311 and the second protrusion 321 have a structure size corresponding to the structure size of the first sliding chute 11 and the second sliding chute 12, the first protrusion 311 and the first sliding chute 11 together guide the moving direction of the first component 31, and the second protrusion 321 and the second sliding chute 12 together guide the moving direction of the second component 32. The upper end of the base 1 is provided with a third sliding chute 13 and a fourth sliding chute 14 which are distributed at intervals, one end of a screw 23 moves along the third sliding chute 13, and the other end of the screw 23The end moves along the fourth runner 14. Specifically, the first transmission member 211 and the second transmission member 212 move away from each other, that is, the first transmission member 211 moves in the left direction shown in fig. 3b, and the second transmission member 212 moves in the right direction shown in fig. 3 b. The first protrusion 311 and the second protrusion 321 are driven by the first member 31 and the second member 32 to generate equal and opposite velocities v and-v, respectively, a direction of the moving velocity v of the first protrusion 311 is the same as a length extending direction of the first sliding chute 11, and a direction of the moving velocity v of the second protrusion 321 is the same as a length extending direction of the second sliding chute 12. The moving speed v of the first protrusion 311 can generate a vertical speed component v₁And a velocity component v in the horizontal direction₂The moving speed-v of the second protrusion 321 can generate a vertical speed component v₁And a velocity component-v in the horizontal direction₂. Vertical direction velocity component v of the first projection 311₁And a vertical direction velocity component v of the second projection 321₁Both ends of the common pushing screw 23 respectively move along the third sliding chute 13 and the fourth sliding chute 14 at a speed v₁Sliding in the vertical direction.

Through set up the spout on the base, set up the arch on the deciliter subassembly, recess and protruding cooperate with the direction of motion of guide deciliter subassembly, and the motion of horizontal direction not only can be realized to the drive assembly, can also realize the motion of vertical direction simultaneously, and this direction mode is nimble convenient.

In other embodiments, as shown in fig. 4, the first and second moving members 221 and 222 are a first gear 2211 and a second gear 2221 engaged with each other, and the first and second gears 2211 and 2221 have the same diameter and number of teeth. Specifically, the first gear 2211 and the second gear 2221 have the same diameter and the same number of teeth, so that the first gear 2211 and the second gear 2221 can be meshed in a rotating mode with the same speed and the same direction. The first transmission member 211 is a first rack 2113 engaged with the first gear 2211, and the second transmission member 212 is a second rack 2123 engaged with the second gear 2221. Specifically, the first rack 2113 and the second rack 2123 are symmetrically arranged about the symmetry axis of the first gear 2211 and the second gear 2221 and correspondingly engaged with the first gear 2211 and the second gear 2221, the rotation of the first gear 2211 and the second gear 2221 drives the first rack 2113 and the second rack 2123 correspondingly engaged with the first gear 2211 and the second gear 2221 to move relatively, and the moving directions of the first rack 2113 and the second rack 2123 are opposite, the speeds are the same, and the synchronization is always maintained. The rotation of the gear is converted into the linear motion of the rack in a gear and rack meshing transmission mode; and the structure is simple and the space occupation ratio is small.

In other embodiments, as shown in fig. 4 and 5, the base 1 is provided with a first notch member 15 and a second notch member 16 which are spaced apart from each other, and the first notch member 15 is used for the first member 31 to pass through so as to guide the moving direction of the first member 31. Specifically, the first notch member 15 and the second notch member 16 are symmetrically arranged about the first gear 2211 and the second gear 2221, the structural shapes of the first notch member 15 and the second notch member 16 are substantially the same as the grooves, the first rack 2113 is arranged on the outer wall surface of the first notch member 15 close to the first gear 2211, the first rack 2113 can linearly move along the outer wall surface of the first notch member 15, and the arrangement of the first notch member 15 can provide a guiding effect for the movement of the first rack 2113. The first component 31 is fixedly connected with the first rack 2113 and forms a fitting connection with the first notch 15, and the first component 31 can slide along the extending direction of the first notch 13 under the driving of the first rack 2113. The second notch member 16 is used for the second member 32 to pass through to guide the moving direction of the second member 32. Specifically, the second rack 2123 is disposed on an outer wall surface of the second notch 16 close to the second gear 2221, so that the second rack 2123 can move linearly along the outer wall surface of the second notch 16, and the second notch 16 is disposed to provide a guiding function for the movement of the second rack 2123. The second component 32 is fixedly connected with the second rack 2123 and forms a fitting connection with the second notch 16, and the second component 32 can slide along the extending direction of the second notch 16 under the driving of the second rack 2123. Since the first and second racks 2113 and 2123 move in opposite directions at the same speed, the first and second components 31 and 32 connected to the racks can always keep moving away and close in parallel. Through set up first breach spare, second breach spare on the base, can provide the guide effect for first rack, second rack correspondingly, further guide the motion of first part, second part.

In some embodiments, the transmission mechanism 2 further comprises a guide mechanism including a first guide member and a second guide member spaced apart from each other; a first guide is connected with the first member 31 and the base 1 to guide a moving direction of the first member 31; the second guide is connected with the second member 32 and the base 1 to guide the moving direction of the second member 32. Specifically, the first guide member and the second guide member are arranged to respectively guide the first component and the second component to move along the preset direction. Specifically, the specific components of the guiding structure may be a protrusion and sliding groove matching form shown in fig. 3b, or a sliding rail in a notch form shown in fig. 4 and 5.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A drive assembly, comprising:

a base (1);

the transmission mechanism (2) is connected with the base (1), and the transmission mechanism (2) comprises a first transmission piece (211) and a second transmission piece (212) which can be relatively far away and close;

the separation and combination assembly (3) comprises a first component (31) and a second component (32), the first component (31) is connected with the first transmission piece (211), and the second component (32) is connected with the second transmission piece (212); the first component (31) and the second component (32) move in parallel to relatively move away from and close to each other under the driving of the first transmission piece (211) and the second transmission piece (212).

2. The transmission assembly according to claim 1, characterized in that said transmission mechanism (2) further comprises:

the synchronous movement mechanism (22) is connected with the base (1) and can move relative to the base (1); the synchronous moving mechanism (22) comprises a first moving part (221) and a second moving part (222) which move along opposite directions;

wherein, the first moving piece (221) is connected with the first transmission piece (211), and the second moving piece (222) is connected with the second transmission piece (212).

3. The transmission assembly according to claim 2, wherein the synchronous kinematic mechanism (22) further comprises:

a slider (223) movable relative to the base (1);

wherein the first moving part (221) and the second moving part (222) are connecting rods which are both rotatably connected with the sliding block (223).

4. The drive assembly of claim 3,

the first transmission piece (211) comprises a first transmission link (2111) and a first guide link (2112); one end of the first transmission connecting rod (2111) is rotatably connected with the first moving part (221), and the other end of the first transmission connecting rod (2111) is rotatably connected with the first component (31); one end of the first guide connecting rod (2112) is rotatably connected with the base (1), and the other end of the first guide connecting rod is rotatably connected with the first component (31);

the second transmission member (212) comprises a second transmission link (2121) and a second guide link (2122); one end of the second transmission connecting rod (2121) is rotatably connected with the second moving part (222), and the other end of the second transmission connecting rod (2121) is rotatably connected with the second part (32); one end of the second guide connecting rod (2122) is rotatably connected with the base (1), and the other end of the second guide connecting rod is rotatably connected with the second part (32);

wherein the first transmission connecting rod (2111) and the second transmission connecting rod (2121) are both rotatably connected with the base (1).

5. The transmission assembly according to claim 1, characterized in that said transmission mechanism (2) further comprises:

the screw rod (23) is connected with the base (1), and threads are arranged on the surface of the screw rod (23);

the first transmission piece (211) and the second transmission piece (212) are nuts which are sleeved on the screw rod (23) and are in threaded connection with the screw rod (23), and the thread rotating direction of the first transmission piece (211) is opposite to the thread rotating direction of the second transmission piece (212).

6. The transmission assembly according to claim 5, wherein the base (1) is provided with a first sliding groove (11) and a second sliding groove (12) which are distributed at intervals, a first protrusion (311) is arranged on the surface of the first component (31) far away from the second component (32), a second protrusion (321) is arranged on the surface of the second component (32) far away from the first component (31), the first protrusion (311) is used for moving along the first sliding groove (11), and the second protrusion (321) is used for moving along the second sliding groove (12); the base (1) is further provided with a third sliding chute (13) and a fourth sliding chute (14) which are distributed at intervals, one end of the screw rod (23) can move along the third sliding chute (13), and the other end of the screw rod can move along the fourth sliding chute (14).

7. The transmission assembly according to claim 2, wherein the first and second moving members (221, 222) are a first gear (2211) and a second gear (2221) which are engaged with each other, and the first gear (2211) and the second gear (2221) have the same diameter and the same number of teeth; the first transmission member (211) is a first rack (2113) engaged with the first gear (2211), and the second transmission member (212) is a second rack (2123) engaged with the second gear (2221).

8. Transmission assembly according to claim 7, characterized in that said base (1) is provided with first (15) and second (16) notch members spaced apart, said first notch members (15) being intended for the passage of said first member (31) for guiding the direction of movement of said first member (31) and said second notch members (16) being intended for the passage of said second member (32) for guiding the direction of movement of said second member (32).

9. The transmission assembly according to claim 1, characterized in that said transmission mechanism (2) further comprises:

the guide mechanism comprises a first guide part and a second guide part which are distributed at intervals; the first guide is connected with the first component (31) and the base (1) to guide the moving direction of the first component (31); the second guide is connected with the second member (32) and the base (1) to guide a moving direction of the second member (32).

10. An electric vehicle, comprising:

a first wheel and a second wheel which are separable and combinable;

the drive assembly of any of claims 1-9;

wherein the first component (31) is a first rear fork connected to a first wheel and the second component (32) is a second rear fork connected to a second wheel.

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