WO2022104888A1

WO2022104888A1 - Differential model assembly and model

Info

Publication number: WO2022104888A1
Application number: PCT/CN2020/132481
Authority: WO
Inventors: 王端; 肖珣; 陈文强
Original assignee: 唐山维数科技有限公司
Priority date: 2020-11-20
Filing date: 2020-11-27
Publication date: 2022-05-27
Also published as: CN112309227A

Abstract

A differential model assembly (100) and a model. The differential model assembly (100) comprises a support frame (1), wheels (2), a steering assembly (3) and a differential assembly (4), wherein the support frame (1) comprises a support bottom plate (11), a pair of wheel mounting mechanisms (12), a pair of differential fixing plates (13) and a steering wheel mounting mechanism (14); a pair of wheels (2) are respectively mounted on the pair of wheel mounting mechanisms (12) and are positioned on outer sides of the wheel mounting mechanisms (12); the steering assembly (3) is mounted on the steering wheel mounting mechanism (14) and is connected to the wheels (2) by means of a steering gear pair (33) and a steering connecting rod (34); and the differential assembly (4) is mounted between the pair of differential fixing plates (13), and is connected to the wheels (2) by means of a differential transmission connecting rod (45) and a wheel transmission universal joint (46). The differential model assembly (100) and the model provide a solid-form teaching aid for teaching in the automobile related professional field, and students can conveniently understand a mechanical structure and a transmission principle in a differential.

Description

A differential model assembly and model

【Technical field】

The invention relates to the fields of teaching tools, models and toys, in particular to a differential gear model assembly and a model.

【Background technique】

The automobile differential is a mechanism that enables the left and right drive wheels to rotate at different speeds, and is mainly composed of left and right side gears, two planetary gears and a gear carrier. When the car is turning or driving on an uneven road, the differential can make the left and right wheels roll at different speeds, that is, to ensure that the driving wheels on both sides perform pure rolling motion. This adjustment of the differential is automatic and is based on the "principle of least energy consumption", that is, all objects on earth tend to consume the least amount of energy. The wheels will also automatically tend to the state with the lowest energy consumption when turning, and automatically adjust the rotation speed of the left and right wheels according to the turning radius.

The power of the car engine is transmitted through the clutch, transmission, transmission shaft, and finally to the drive axle and then distributed to the left and right axle drive wheels. On this power transmission path, the drive axle is the last assembly, and its main components are the reducer and Differential, so the differential is an essential part of the car and plays an important role. With the rapid development of the automobile industry, the technological progress in the automobile field requires a large number of professional talents. However, the current traditional teaching mode for talent training in this major is the use of book principle explanation, animation and video viewing. Form teaching equipment and utensils, students can not actually operate, the experience is poor.

[Content of the invention]

The present invention proposes a differential gear model assembly and model, which provide a teaching tool in a physical form for teaching work and assist students in learning the relevant knowledge of the differential gear.

The differential model assembly proposed according to the present invention includes:

The support frame body includes a support base plate, a pair of wheel mounting mechanisms, a pair of differential gear fixing plates and a steering wheel mounting mechanism, a pair of wheel mounting mechanisms are respectively arranged on both sides of the support base plate, and a pair of differential gear fixing plates They are respectively arranged on the inner side of a pair of wheel mounting mechanisms, and the steering wheel mounting mechanisms are fixed on the support frame body and face the area between a pair of differential fixing plates;

a pair of wheels, which are respectively mounted on a pair of wheel mounting mechanisms and are located outside the wheel mounting mechanisms;

Steering assembly, the steering assembly is installed on the steering wheel mounting mechanism, and is connected with the wheel through the steering gear pair and the steering link;

The differential assembly is installed between a pair of differential fixing plates, and is connected with the wheels through the differential transmission connecting rod and the wheel transmission universal joint.

In one embodiment, a plurality of slots are opened on the support bottom plate, and the bottom of the wheel mounting mechanism, the differential fixing plate and the steering wheel mounting mechanism are provided with insertion rods, and the insertion rods are matched with the slots, thereby connecting the wheel mounting mechanism, the differential The derailleur fixing plate and steering wheel mounting mechanism are connected to the support base plate.

In one embodiment, the wheel mounting mechanism includes a pair of wheel fixing support plates and a pair of wheel steering fixing plates, the pair of wheel fixing support plates are arranged parallel to each other and opposite to each other and are perpendicular to the support base plate, and the pair of wheel steering fixing plates are respectively Installed on the upper and lower sides of a pair of wheel fixing support plates.

In one embodiment, the steering wheel mounting mechanism includes a pair of steering wheel mounting vertical plates and a pair of steering wheel positioning plates, the pair of steering wheel mounting vertical plates are arranged parallel to each other and opposite to each other, and are perpendicular to the support base plate, and the pair of steering wheel positioning plates are mounted on a A box shape is formed between the front side surface and the rear side surface of the steering wheel installation vertical plate.

In one embodiment, a pair of steering wheel positioning plates are provided with holes, and the center line of the holes extends obliquely downward toward the rear side of the support bottom plate.

In one embodiment, the steering assembly includes a steering wheel and a steering wheel connecting rod for the user to operate, one end of the steering wheel connecting rod is fixedly connected with the steering wheel, and the other end of the steering wheel connecting rod passes through a pair of holes on the steering wheel positioning plate, and passes through the The steering gear pair is connected with the steering link.

In one embodiment, the steering rod passes through a pair of square holes on the differential fixing plate, and the two ends of the steering rod are connected to the wheel shaft through the steering fork, so as to realize the adjustment of the left and right rotation directions of the wheels.

In one embodiment, the end of the steering fork connected to the wheel axle has a pair of protrusions arranged symmetrically up and down, and the pair of protrusions are respectively matched with the limit holes on the pair of wheel steering fixing plates.

A differential gear model proposed according to the present invention includes:

A support frame body made of transparent material, the support frame body includes a support base plate, a pair of wheel mounting mechanisms, a pair of differential fixing plates and a steering wheel mounting mechanism, a pair of wheel mounting mechanisms are respectively arranged on both sides of the support base plate, one The differential fixing plates are respectively arranged on the inner side of the pair of wheel mounting mechanisms, the steering wheel mounting mechanism is fixed on the support frame body, and faces the area between the pair of differential fixing plates;

The differential model of the present invention shows two mechanical transmission structures of differential transmission and steering transmission and their transmission principles according to the basic working principle of the differential. Students can intuitively observe the mechanical mechanism inside the differential from the outside. Structure, and you can manually operate the steering wheel, live experience. Therefore, the differential gear model of the present application provides teaching aids in the form of entities for the teaching work of automobile-related majors, and improves the intuitive feeling and experience of teaching.

【Description of drawings】

The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic diagram of a differential model assembly of a preferred embodiment of the present invention;

Fig. 2 is a schematic diagram of another angle of the differential model assembly in Fig. 1;

Fig. 3 is the schematic diagram of the support frame body of the differential gear model assembly in Fig. 1;

Fig. 4 is a schematic diagram of another angle of the support frame body of the differential model assembly in Fig. 3;

Fig. 5 is the schematic diagram of the differential model assembly in Fig. 1, wherein the support frame body is removed;

Figure 6 is a schematic diagram of another angle of the differential model assembly in Figure 5;

7 is a schematic diagram of a differential assembly of the differential model assembly of FIG. 1;

FIG. 8 is a schematic view of another angle of the differential assembly of the differential model assembly of FIG. 7 .

In the attached picture:

100 is the model assembly, 1 is the support frame, 2 is the wheel, 3 is the steering assembly, 4 is the differential assembly, 5 is the drive motor assembly, 11 is the support base plate, 12 is the wheel mounting mechanism, and 13 is the differential fixing Plate, 14 is the steering wheel mounting mechanism, 15 is the drive motor fixing plate, 20 is the wheel axle, 110 is the slot, 120 is the chamber, 121 is the wheel fixing support plate, 122 is the wheel steering fixing plate, and 1220 is the wheel steering fixing plate 131 is the vertical part, 132 is the horizontal part, 1310 is the hole of the vertical part, 1320 is the square hole of the horizontal part, 141 is the steering wheel mounting vertical plate, 142 is the steering wheel positioning plate, 1420 is the steering wheel positioning plate Plate hole, 150 is the hole of the drive motor fixing plate, 160 is the insert rod, 31 is the steering wheel, 32 is the steering wheel connecting rod, 33 is the steering gear pair, 34 is the steering link, 35 is the steering fork, and 350 is the protrusion , 331 is the gear, 332 is the rack, 40 is the chamber of the differential assembly, 41 is the differential bracket, 42 is the differential rotating gear, 43 is the differential gear, 44 is the wheel drive gear, 45 is The differential transmission link, 46 is the wheel drive universal joint, 411 is the front plate, 412 is the rear plate, 413 is the side plate, 51 is the motor, and 52 is the motor transmission gear.

【Detailed ways】

The technical solutions of the present invention will be more clearly and completely described below through the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in FIGS. 1 and 2 , the differential model assembly 100 according to the preferred embodiment of the present invention includes: a support frame 1 , a pair of wheels 2 , a steering assembly 3 , a differential assembly 4 and a drive motor assembly 5 . 2. The steering assembly 3 , the differential assembly 4 and the drive motor assembly 5 are mounted on the support frame body 1 , thereby forming a differential model assembly 100 .

The structure and working principle of each part of the differential model assembly 100 will be described in detail below.

support frame 1

As shown in FIGS. 3 and 4 , the support frame body 1 includes a support base plate 11 , a pair of wheel mounting mechanisms 12 , a pair of differential fixing plates 13 , a steering wheel mounting mechanism 14 and a drive motor fixing plate 15 . The wheel mounting mechanism 12 , the differential fixing plate 13 , the steering wheel mounting mechanism 14 and the drive motor fixing plate 15 are mounted on the support base plate 11 .

A pair of wheel mounting mechanisms 12 are respectively mounted on the left and right sides of the support base plate 11 and are close to the rear side of the support base plate 11 . The wheel mounting mechanisms 12 respectively protrude from the left and right sides of the support base plate 11 for mounting the wheels 2 . The two wheel mounting mechanisms 12 have the same structure and are arranged symmetrically, and the structure of one of the wheel mounting mechanisms is described as an example here. The wheel mounting mechanism 12 includes a pair of wheel fixing support plates 121 and a pair of wheel steering fixing plates 122 . A pair of wheel fixing support plates 121 are arranged parallel to each other and opposite to each other, and are perpendicular to the support base plate 11 . One end of the wheel fixing support plate 121 is connected to the support base plate 11 , and the other end extends out of the support base plate 11 . A pair of wheel steering fixing plates 122 are respectively installed on the upper side and lower side of the pair of wheel fixing support plates 121, the wheel steering fixing plate 122 is shorter, and specifically, it is installed on the upper side and the lower side of the protruding end of the wheel fixing support plate 121. side, thereby forming a wheel mounting mechanism 12 . The cavity 120 that is jointly enclosed by the wheel fixing support plate 121 and the wheel steering fixing plate 122 is used for accommodating the power transmission mechanism from the differential assembly 4 to the wheel 2 .

A pair of differential fixing plates 13 are respectively arranged on the inner side of the pair of wheel mounting mechanisms 12 , which are arranged symmetrically and are perpendicular to the support base plate 11 . The area between a pair of differential fixing plates 13 is used for mounting the differential assembly 4 . In this embodiment, the differential fixing plate 13 is substantially L-shaped, and includes a vertical portion 131 and a horizontal portion 132. The vertical portion 131 is in contact with the inner end surface of the wheel fixing support plate 121, and a hole 1310 is opened thereon. The hole 1310 leads to the cavity 120 jointly enclosed by the wheel fixing support plate 121 and the wheel steering fixing plate 122 . The horizontal portion 132 extends toward the front side of the support bottom plate 11 , and a square hole 1320 is opened on the horizontal portion 132 for the steering link 34 to pass through and for supporting the steering link 34 .

The steering wheel mounting mechanism 14 is mounted on the front side of the support base plate 11 and faces the area between the pair of differential fixing plates 13 for mounting the steering wheel. The steering wheel mounting mechanism 14 includes a pair of steering wheel mounting vertical plates 141 and a pair of steering wheel positioning plates 142 . A pair of steering wheel mounting vertical plates 141 are disposed parallel to each other in the left-right direction of the support base plate 11 and are perpendicular to the support base plate 11 . The pair of steering wheel mounting uprights 141 are inclined rearward, so that the height of the front side thereof is higher than the height of the rear side. A pair of steering wheel positioning plates 142 are installed between the front and rear sides of the pair of steering wheel mounting uprights 141, and together form a box shape with an upper opening, and the top surface of the box is located on a rearward and downward inclined surface. A pair of steering wheel positioning plates 142 are both provided with holes 1420 for the steering wheel connecting rods 32 to pass through. Due to the inclined arrangement of the box body, the center line connecting the holes on the two steering wheel positioning plates 142 is an oblique line inclined downward toward the rear side of the support base plate 11, so that the steering rod connecting rod 32 passes through the hole 1420 and is assembled to When the steering wheel mounting mechanism 14 is on, it is in a state of being inclined downward, which is consistent with the steering wheel setting of an actual automobile.

The drive motor fixing plate 15 is disposed between the wheel mounting mechanism 12 and the steering wheel mounting mechanism 14, and is located on one side of the steering wheel mounting mechanism 14, for mounting the drive motor. The lower end of the drive motor fixing plate 15 is connected to the support base plate 11 , and a hole 150 is formed in the upper part of the drive motor fixing plate 15 , through which the output shaft of the electric motor passes.

As shown in FIG. 4 , the wheel mounting mechanism 12 , the differential fixing plate 13 , the steering wheel mounting mechanism 14 and the driving motor fixing plate 15 are all mounted on the support base plate 11 by plugging. Specifically, a plurality of slots 110 are opened on the support base plate 11 , and the lower ends of the wheel mounting mechanism 12 , the differential fixing plate 13 , the steering wheel mounting mechanism 14 and the driving motor fixing plate 15 extend downward to form the insertion rod 160 . More specifically, the bottom of the wheel fixing support plate 121 of the wheel mounting mechanism, the differential fixing plate 13 , the steering wheel mounting vertical plate 141 of the steering wheel mounting mechanism, and the driving motor fixing plate 15 have insert rods 160 . When assembling, insert the rod 160 into the slot 110, the wheel mounting mechanism 12, the differential fixing plate 13, the steering wheel mounting mechanism 14 and the driving motor fixing plate 15 can be mounted to the supporting base plate 11, which is convenient for installation and disassembly.

Steering assembly 3

As shown in FIGS. 5 and 6 , the steering assembly 3 is mounted on the steering wheel mounting mechanism 14 , and is connected to the wheel 2 through the steering gear pair 33 and the steering link 34 . Specifically, the steering assembly 3 includes a steering wheel 31 and a steering wheel link 32 . The steering wheel 31 is operated by the user. The upper end of the steering wheel connecting rod 32 is fixedly connected with the steering wheel 31 , and the lower end passes through the holes 1420 on the pair of steering wheel positioning plates 142 .

The lower end of the steering wheel link 32 is connected to the wheel 2 through a steering gear pair 33 , a steering link 34 and a steering fork 35 . Specifically, the steering gear pair 33 is a rack and pinion transmission mechanism, including a gear 331 and a rack 332 . The gear 331 is fixedly mounted on the lower end of the steering link 32 , and the rack 332 is formed on the steering link 34 .

The steering link 34 is an elongated rod, which passes through a pair of square holes 1320 on the horizontal portion 132 of the differential mounting plate, extends from the left side to the right side of the support base plate 11 , and protrudes from the support base plate 11 at both ends. . A pair of steering forks 35 are respectively connected to both ends of the steering link 34 . Specifically, one end of the steering fork 35 is connected to the steering link 34 , and the other end is sleeved on the wheel axle 20 .

In this way, when the user turns the steering wheel 31, the steering wheel connecting rod 32 rotates along with it, and drives the gear 331 to rotate together. The steering link 34 then drives one end of the steering fork 35 to move in a straight line, and the other end of the steering fork 35 drives the wheel 2 to turn, so as to adjust the left and right rotation directions of the wheels.

One end of the steering fork 35 sleeved on the wheel axle 20 is annular, the top surface and the bottom surface of the annular portion are respectively provided with protrusions 350, and a pair of protrusions 350 respectively protrude upwards and downwards. Limiting holes 1220 are respectively opened on a pair of wheel steering fixing plates 122 of the wheel mounting mechanism for cooperating with the protrusions 350 . In the assembled state, a pair of protrusions 350 are respectively located in the limiting holes 1220 , so that the other end of the steering fork 35 is mounted on the wheel mounting mechanism 12 .

Differential assembly 4

As shown in FIGS. 7 and 8 , the differential assembly 4 includes a differential carrier 41 , a differential rotating gear 42 , a differential gear 43 , a wheel drive gear 44 and a differential drive link 45 .

The differential bracket 41 is a frame composed of three plates with an opening on one side, which includes a front plate 411, a rear plate 412, and a side plate 413. The front plate 411 and the rear plate 412 are arranged parallel to each other, and the side plate 413 and the front plate 411. and one end of the rear plate 412 is connected. The differential rotating gear 42 is arranged at the opening of the frame, and the differential rotating gear 42 and the differential bracket 41 together form a cavity 40, the cavity accommodates a pair of differential rotating gears 42 and a pair of wheel drive Gear 44. Specifically, a pair of differential gears 43 are respectively rotatably mounted on the front plate 411 and rear plate 412 of the frame through shafts, and one of the pair of wheel transmission gears 44 is rotatably mounted on the side plate 413 through shafts, The other is coaxial with the differential rotating gear 42 . Therefore, a pair of differential rotation gears 42 and a pair of wheel transmission gears 44 are respectively located on four sides of the cavity 40 jointly enclosed by the differential rotation gear 42 and the differential bracket 41, and each wheel transmission gear 44 At the same time, it meshes with a pair of differential rotating gears 42 .

A pair of differential transmission connecting rods 45 are respectively arranged on both sides of the differential support 41 , specifically, one of the differential transmission connecting rods 45 is fixedly connected with the differential rotating gear 42 , and the other differential transmission connecting rod 45 is fixedly connected. The rod 45 is fixedly connected to the wheel drive gear 44 opposite the differential rotation gear 42 . The free ends of the pair of differential transmission connecting rods 45 respectively pass through the holes 1310 on the differential fixing plate 13, on the one hand, the entire differential assembly 4 is rotatably supported on the pair of differential fixing plates 13, On the other hand, the free end of the differential drive link 45 is connected with the wheel axle 20 through the wheel drive universal joint 46 so as to transmit the power of the differential assembly 3 to the wheel 2 .

Drive motor assembly 5

As shown in FIGS. 1 to 2 and 5 to 6 , the drive motor assembly 5 includes a motor 51 and a motor transmission gear 52 , which are respectively disposed on both sides of the drive motor fixing plate 15 , and the motor shaft passes through the drive motor fixing plate The hole 150 of the motor drive gear 52 is fixedly installed on the motor shaft, and is driven by the motor 51 to rotate. The motor transmission gear 52 meshes with the differential rotation gear 42 to transmit the power of the motor 51 to the differential assembly 4 . Those skilled in the art can imagine that the drive motor assembly 5 may further include a deceleration device for reducing the rotational speed of the motor to provide a suitable rotational speed for the differential assembly.

In other embodiments, the differential model assembly 100 may also omit the drive motor assembly, and manually drive the differential assembly. For example, a handle for the user to operate is provided, and the gear is rotated by manually rotating the differential to drive the wheels. rotate. Correspondingly, there is no need to provide a drive motor mounting plate on the support frame body 1 .

The working principle of the differential model assembly of the present invention is:

The motor 51 drives the differential rotation gear 42 to rotate through the meshing of the motor transmission gear 52 with the differential rotation gear 42. The differential rotation gear 42 is coaxial with one of the wheel transmission gears 44, thereby driving the wheel transmission gear 44 to rotate. , the wheel transmission gear 44 drives the differential gear 43 to rotate through meshing with a pair of differential gears 43 , and then the differential gear 43 meshes with another wheel transmission gear 44 to drive the wheel transmission gear 44 to rotate , the two wheel transmission gears 44 drive the wheel 2 to rotate through the differential transmission link 45 and the wheel transmission universal joint 46, thereby realizing the driving of the wheel.

When the user does not turn the steering wheel 31, the pair of differential gears 43 only rotates with the differential gear 42 and does not rotate. At this time, the main function of the differential gear 43 is to transmit power. the same speed.

When the user turns the steering wheel 31 , the steering assembly 3 drives the wheel 2 to turn through the steering gear pair 33 , the steering link 34 and the steering fork 35 . The wheel on the inner side of the steering is subject to greater resistance. At this time, the rotational speed of the two wheels is different, and is reflected on the differential gear 43 through the differential transmission link 45, forcing the differential gear 43 to rotate, so that the steering is in the steering wheel. The rotational speed of the differential transmission link 45 on the inner side is slowed down, and the rotational speed of the differential transmission link 45 on the outer side of the steering is accelerated, thereby realizing the difference in the rotational speed of the wheels on both sides.

In order to visualize the internal mechanical structure and transmission mode of the differential, the support frame 1 of the differential model of the present application is made of transparent material. The differential model intuitively shows the structure and principle of the wheel's differential transmission and steering transmission. Users can not only intuitively observe the internal mechanical structure and transmission principle of the differential from the outside, but also manually operate the steering wheel to experience it, which effectively helps students understand and master the relevant knowledge of the differential, which is helpful for the development of teaching work.

The various specific embodiments described above and shown in the accompanying drawings are only used to illustrate the present invention, and not all of the present invention. Within the scope of the basic technical idea of the present invention, any form of modification made by those of ordinary skill in the relevant technical field to the present invention is within the protection scope of the present invention.

Claims

A differential model assembly (100), characterized in that it includes:

A support frame body (1), the support frame body (1) comprises a support base plate (11), a pair of wheel mounting mechanisms (12), a pair of differential fixing plates (13) and a steering wheel mounting mechanism (14), so The pair of wheel mounting mechanisms (12) are respectively provided on both sides of the support base plate (11), and the pair of differential fixing plates (13) are respectively provided on the inner side of the pair of wheel mounting mechanisms (12) , the steering wheel mounting mechanism (14) is fixed on the support frame body (11), and faces the area between the pair of differential fixing plates (13);

a pair of wheels (2), wherein the pair of wheels (2) are respectively mounted on the pair of wheel mounting mechanisms (12) and are located outside the wheel mounting mechanisms (12);

a steering assembly (3), the steering assembly (3) is mounted on the steering wheel mounting mechanism (14), and is connected to the wheel (2) through a steering gear pair (33) and a steering connecting rod (34);

A differential assembly (4), the differential assembly (4) is mounted between the pair of differential fixing plates (13), and drives the universal gear through the differential transmission connecting rod (45) and the wheels A segment (46) is connected to the wheel (2).
The differential model assembly (100) of claim 1, wherein:

The supporting bottom plate (11) is provided with a plurality of slots (110), and the bottom of the wheel mounting mechanism (12), the differential fixing plate (13) and the steering wheel mounting mechanism (14) are provided with insert rods (160) , the plunger (160) cooperates with the slot (110), thereby connecting the wheel mounting mechanism (12), the differential fixing plate (13) and the steering wheel mounting mechanism (14) to the support base plate (11) on.
The differential model assembly (100) of claim 1, wherein:

The wheel mounting mechanism (12) includes a pair of wheel fixing support plates (121) and a pair of wheel steering fixing plates (122), and the pair of wheel fixing support plates (121) are arranged parallel to each other and opposite to each other and perpendicular to the In the supporting base plate (11), the pair of wheel steering fixing plates (122) are respectively installed on the upper side surface and the lower side surface of the pair of wheel fixing support plates (121).
The differential model assembly (100) of claim 3, wherein:

The steering wheel mounting mechanism (14) comprises a pair of steering wheel mounting uprights (141) and a pair of steering wheel positioning plates (142), the pair of steering wheel mounting uprights (141) are arranged parallel to each other and opposite to each other and perpendicular to the The base plate (11) is supported, and the pair of steering wheel positioning plates (142) are installed between the front side surfaces and the rear side surfaces of the pair of steering wheel mounting vertical plates (141), and together form a box shape.
The differential model assembly (100) of claim 4, wherein:

The pair of steering wheel positioning plates (142) are provided with holes (1420), and the center line of the holes (1420) extends obliquely downward toward the rear side of the support base plate (11).
The differential model assembly (100) of claim 5, wherein:

The steering assembly (3) comprises a steering wheel (31) for a user to operate and a steering wheel connecting rod (32), one end of the steering wheel connecting rod (32) is fixedly connected with the steering wheel (31), and the steering wheel connecting rod (32) is The other end of (32) passes through the holes (1420) on the pair of steering wheel positioning plates, and is connected to the steering link (34) through the steering gear pair (33).
The differential model assembly (100) of claim 6, wherein:

The steering link (34) passes through the square holes (1320) on the pair of differential fixing plates (13), and both ends of the steering link (34) are connected to the steering fork (35) through the steering fork (35). The wheel axles (20) of the wheels are connected, so as to realize the adjustment of the left and right rotation directions of the wheels (2).
The differential model assembly (100) of claim 7, wherein:

One end of the steering fork (35) connected to the wheel axle (20) has a pair of protrusions (350) symmetrically arranged up and down, and the pair of protrusions (350) are respectively steered and fixed to the pair of wheels The limit holes (1220) on the plate (122) are matched.
A differential model, characterized in that, comprising:

A support frame body (1) made of transparent material, the support frame body (1) comprising a support base plate (11), a pair of wheel mounting mechanisms (12), a pair of differential fixing plates (13) and steering wheel mounting Mechanism (14), the pair of wheel mounting mechanisms (12) are respectively arranged on both sides of the support base plate (11), and the pair of differential fixing plates (13) are respectively arranged on the pair of wheel mounts On the inner side of the mechanism (12), the steering wheel mounting mechanism (14) is fixed on the support frame body (11), and faces the area between the pair of differential fixing plates (13);

a pair of wheels (2), wherein the pair of wheels (2) are respectively mounted on the pair of wheel mounting mechanisms (12) and are located outside the wheel mounting mechanisms (12);

a steering assembly (3), the steering assembly (3) is mounted on the steering wheel mounting mechanism (14), and is connected to the wheel (2) through a steering gear pair (33) and a steering connecting rod (34);

A differential assembly (4), the differential assembly (4) is mounted between the pair of differential fixing plates (13), and drives the universal gear through the differential transmission connecting rod (45) and the wheels A segment (46) is connected to the wheel (2).