CN116558818B

CN116558818B - Bent rail gear rack meshing test device

Info

Publication number: CN116558818B
Application number: CN202310852623.0A
Authority: CN
Inventors: 龙潜; 高畅; 邓星桥; 曾李元; 任炯康
Original assignee: Sichuan Shudao New Standard Track Group Co ltd
Current assignee: Sichuan Shudao New Standard Track Group Co ltd
Priority date: 2023-07-12
Filing date: 2023-07-12
Publication date: 2023-09-05
Anticipated expiration: 2043-07-12
Also published as: CN116558818A

Abstract

The application relates to the technical field of gear and rack meshing test, in particular to a bent rail gear and rack meshing test device which comprises a rack seat and a driving device, wherein the driving device comprises a first driving component and a second driving component, the first driving component is used for controlling the rack seat to move along the length direction of the rack seat, the second driving component is used for controlling the rack seat to move along the width direction of the rack seat, a rack is arranged on the rack seat, the length direction of the rack is in the same direction as the length direction of the rack seat, and the rack is used for meshing with a gear. According to the application, the first driving assembly, the second driving assembly and the control gear rotate around the rotating shaft, so that the meshing test can be performed on the curved track gear rack with various curvature radiuses on the premise of not replacing the rack, the test cost is reduced, the workload of an operator is reduced, and the rack is not required to be replaced.

Description

Bent rail gear rack meshing test device

Technical Field

The application relates to the technical field of gear and rack meshing test, in particular to a bent rail gear and rack meshing test device.

Background

At present, most of gear and rack meshing tests are meshing tests between a straight rail rack and a gear, in the process of the meshing tests, under the normal condition, the gear rotates, the straight rail rack moves along a straight line, and the gear and rack meshing mode is simple and convenient to achieve, and an operator can conveniently conduct meshing test operation.

For the curved rail meshing test, a gear is usually meshed with a curved rail rack in a curved shape and performs meshing motion, so that the purpose of the curved rail meshing test is achieved.

Further, for a single curved rack, the curvature radius of the curved rack is unique, if the curved rack with multiple curvature radii is to be subjected to the meshing test, the purpose of the test can be achieved by preparing curved racks with multiple types of curvature radii, so that the meshing test on the curved racks with multiple curvature radii is difficult on the premise of not replacing the original curved racks, and on the premise of implementing the meshing test on the multiple racks, the curved racks with multiple different curvature radii are required to be prepared, and in addition, during the test, the curved racks are required to be continuously replaced on the test bench, so that the test cost is increased, the workload of an operator is increased, and the inconvenience in the meshing test on the curved racks with multiple curvature radii is increased.

Therefore, in view of the above-mentioned shortcomings, it is currently highly desirable to design a curved track rack and pinion engagement test device so as to perform engagement test on curved track racks and pinions with various curvature radii, reduce test cost and reduce the workload of operators.

Disclosure of Invention

The invention aims at: aiming at the defects existing in the prior bent rail meshing test, the bent rail gear and rack meshing test device is provided, so that the bent rail gear and rack with various curvature radiuses can be meshed and tested, the test cost is reduced, and the workload of an operator is reduced.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a curved track rack and pinion meshing test device, includes rack seat and drive arrangement, drive arrangement includes first drive assembly and second drive assembly, first drive assembly is used for controlling the rack seat is followed the length direction of rack seat removes, second drive assembly is used for controlling the rack seat is followed the width direction of rack seat removes, be provided with the rack on the rack seat, the length direction of rack with the length direction syntropy of rack seat, the rack is used for meshing with the gear.

As a preferred technical scheme of the application, the curved track gear-rack engagement test device further comprises a base, the first driving assembly comprises a first motor and a first screw rod, the first screw rod is matched with the rack base, and the first motor is used for driving the first screw rod to rotate;

the second driving assembly comprises a second motor and a second lead screw, the second lead screw is matched with the rack seat, and the second motor is used for driving the second lead screw to rotate;

the first driving assembly further comprises a first guide rail and a first sliding block, the first motor is arranged on the first sliding block, and the first sliding block can move along the length direction of the first guide rail;

the second driving assembly further comprises a second guide rail and a second sliding block, the second motor is arranged on the second sliding block, and the second sliding block can move along the length direction of the second guide rail;

the first guide rail and the second guide rail are both fixed on the base.

As a preferred technical scheme of the application, the first driving assembly further comprises a first auxiliary guide rail and a first auxiliary sliding block, wherein the first auxiliary guide rail is fixed on the base, the first auxiliary sliding block can move along the length direction of the first auxiliary guide rail, the first auxiliary sliding block is rotationally connected with the first lead screw, and the first sliding block and the first auxiliary sliding block synchronously move in the same direction;

The second driving assembly further comprises a second auxiliary guide rail and a second auxiliary sliding block, the second auxiliary guide rail is fixed on the base, the second auxiliary sliding block can move along the length direction of the second auxiliary guide rail, the second auxiliary sliding block is rotationally connected with the second lead screw, and the second sliding block and the second auxiliary sliding block synchronously move in the same direction.

As a preferred technical scheme of the present application, the first driving assembly further includes a first guiding rod, a first guiding hole is provided on the rack seat, the first guiding rod is adapted to the first guiding hole, one end of the first guiding rod is connected to the first slider, and the other end of the first guiding rod is connected to the first auxiliary slider.

As a preferred technical scheme of the present application, the second driving assembly further includes a second guiding rod, a second guiding hole is provided on the rack seat, the second guiding rod is adapted to the second guiding hole, one end of the second guiding rod is connected to the second slider, and the other end of the second guiding rod is connected to the second auxiliary slider.

As a preferred technical scheme of the application, the first guide rod is provided with a first forward rack and a first reverse rack, and the length direction of the first forward rack and the length direction of the first reverse rack are both in the same direction with the length direction of the first guide rod; the first guide hole is internally provided with a first forward abutting piece and a first reverse abutting piece, the first forward abutting piece and the first reverse abutting piece are elastic, the first guide rod is further provided with a first forward groove and a first reverse groove, the first guide rod is rotationally connected with the first sliding block and the first auxiliary sliding block, when the first forward rack is matched with the first forward abutting piece, the first reverse abutting piece is matched with the first reverse groove, and when the first reverse rack is matched with the first reverse abutting piece, the first forward abutting piece is matched with the first forward groove;

On the basis that the first forward rack is matched with the first forward abutting piece, the first motor rotates forward and drives the rack seat to move in a forward single direction along the length direction of the rack seat, all parts on the first forward rack sequentially pass through the first forward abutting piece, the first reverse abutting piece moves in the first reverse groove, and when the first motor rotates reversely, the first forward abutting piece abuts against the first forward rack to resist the rack seat to move reversely along the length direction of the rack seat;

and on the basis of the cooperation of the first reverse rack and the first reverse abutting piece, the first motor reverses and drives the rack seat to move in a reverse single direction along the length direction of the rack seat, each part on the first reverse rack sequentially passes through the first reverse abutting piece, the first forward abutting piece moves in the first forward groove, and when the first motor rotates forward, the first reverse abutting piece abuts against the first reverse rack to resist forward movement of the rack seat along the length direction of the rack seat.

As a preferred technical scheme of the application, the second guide rod is provided with a second forward rack and a second reverse rack, and the length direction of the second forward rack and the length direction of the second reverse rack are both in the same direction with the length direction of the second guide rod; the second guide hole is internally provided with a second forward abutting piece and a second reverse abutting piece, the second forward abutting piece and the second reverse abutting piece are elastic, the second guide rod is internally provided with a second forward groove and a second reverse groove, the second guide rod is rotationally connected with the second sliding block and the second auxiliary sliding block, when the second forward rack is matched with the second forward abutting piece, the second reverse abutting piece is matched with the second reverse groove, and when the second reverse rack is matched with the second reverse abutting piece, the second forward abutting piece is matched with the second forward groove;

On the basis that the second forward rack is matched with the second forward abutting piece, the second motor rotates forward and drives the rack seat to move in a forward single direction along the width direction of the rack seat, all parts on the second forward rack sequentially pass through the second forward abutting piece, the second reverse abutting piece moves in the second reverse groove, and when the second motor rotates reversely, the second forward abutting piece abuts against the second forward rack to resist the rack seat to move reversely along the width direction of the rack seat;

and on the basis that the second reverse rack is matched with the second reverse abutting piece, the second motor reversely rotates and drives the rack seat to move in a reverse single direction along the width direction of the rack seat, all parts on the second reverse rack sequentially pass through the second reverse abutting piece, the second forward abutting piece moves in the second forward groove, and when the second motor positively rotates, the second reverse abutting piece abuts against the second reverse rack so as to resist forward movement of the rack seat along the width direction of the rack seat.

As a preferred technical solution of the present application, a surface of the first forward rack, which is used to abut against the first forward abutment, is a first forward abutment surface, a surface of the first forward rack, which is used to pass through the first forward abutment, is a first forward passing surface, an included angle formed by the first forward abutment surface and the length direction of the first guide rod is a, and an included angle formed by the first forward passing surface and the length direction of the first guide rod is b;

Said a is less than 90 ° and said b is less than said a;

the first reverse rack is provided with a first reverse resisting surface on one surface for resisting the first reverse resisting sheet, the first reverse rack is provided with a first reverse passing surface on one surface for passing through the first reverse resisting sheet, an included angle formed by the first reverse resisting surface and the length direction of the first guide rod is c, and an included angle formed by the first reverse passing surface and the length direction of the first guide rod is d;

said c is less than 90 °, and said d is less than said c;

the surface, which is used for abutting against the second forward abutting piece, of the second forward rack is a second forward abutting surface, the surface, which is used for passing through the second forward abutting piece, of the second forward rack is a second forward passing surface, an included angle formed by the second forward abutting surface and the length direction of the second guide rod is e, and an included angle formed by the second forward passing surface and the length direction of the second guide rod is f;

said e is less than 90 °, and said f is less than said e;

the surface of the second reverse rack, which is used for being abutted against the second reverse abutting piece, is a second reverse abutting surface, the surface of the second reverse rack, which is used for being abutted against the second reverse abutting piece, is a second reverse passing surface, an included angle formed by the second reverse abutting surface and the length direction of the second guide rod is g, and an included angle formed by the second reverse passing surface and the length direction of the second guide rod is h;

The g is less than 90 °, and the h is less than the g.

As a preferred technical scheme of the application, the first guide hole is further provided with a first forward adjusting component, the first forward adjusting component is used for adjusting the distance between the first forward butting piece and the central axis of the first guide rod, the first forward adjusting component comprises a first forward sliding block, a first forward auxiliary sliding block, a first forward adjusting piece and a first forward spring, the first forward spring has elasticity, a first forward accommodating cavity is arranged in the rack seat, the first forward sliding block, the first forward auxiliary sliding block and the first forward spring are positioned in the first forward accommodating cavity, the first forward sliding block is fixed with the first forward butting piece, the first forward adjusting piece is in threaded connection with the rack seat, the rack seat is abutted with the first forward auxiliary sliding block, the first forward auxiliary sliding block is abutted with the first forward sliding block, the first forward sliding block is abutted with the first forward sliding piece, the first forward sliding piece is in contact with the first forward accommodating cavity, the first forward adjusting piece is in a direction of the first forward adjusting component, and the first forward adjusting component is driven by the first forward adjusting piece to move along the first forward adjusting component in a collinear manner when the first forward adjusting piece is in a direction opposite to the first forward adjusting component;

The first guide hole is further provided with a first reverse adjusting assembly, the first reverse adjusting assembly is used for adjusting the distance between the first reverse butt piece and the central axis of the first guide rod, the first reverse adjusting assembly comprises a first reverse sliding block, a first reverse auxiliary sliding block, a first reverse adjusting piece and a first reverse spring, the first reverse spring is elastic, a first reverse accommodating cavity is formed in the rack seat, the first reverse sliding block, the first reverse auxiliary sliding block and the first reverse spring are located in the first reverse accommodating cavity, the first reverse sliding block is fixed with the first reverse butt piece, the first reverse adjusting piece is in threaded connection with the rack seat, the rack seat is abutted against the first reverse auxiliary sliding block, the first reverse auxiliary sliding block is abutted against the first reverse sliding block, the first reverse spring is connected between the first reverse sliding block and the first reverse accommodating cavity, the direction of the first reverse spring and the first reverse adjusting assembly are located in the first reverse accommodating cavity, and the first reverse sliding block is in a direction opposite to the first guide rod moves to the first guide rod, and the first guide rod is in a direction opposite to the first guide rod to move, and the first guide rod is in a collinear manner, and the first guide rod is rotated;

The second guide hole is further provided with a second forward adjusting component, the second forward adjusting component is used for adjusting the distance between the second forward butting piece and the central axis of the second guide rod, the second forward adjusting component comprises a second forward sliding block, a second forward auxiliary sliding block, a second forward adjusting piece and a second forward spring, the second forward spring is elastic, a second forward accommodating cavity is formed in the rack seat, the second forward sliding block, the second forward auxiliary sliding block and the second forward spring are located in the second forward accommodating cavity, the second forward sliding block is fixed with the second forward butting piece, the second forward adjusting piece is in threaded connection with the rack seat, the rack seat is abutted against the second forward auxiliary sliding block, the second forward sliding block is abutted against the second forward sliding block, a second forward accommodating cavity is connected with the second forward adjusting piece, the second forward adjusting piece is in a linear manner, and the second forward adjusting piece is driven by the second forward adjusting piece, and the second forward adjusting piece is in a linear manner, and the second forward adjusting piece is driven by the second forward adjusting piece;

The second guide hole is further provided with a second reverse adjusting assembly, the second reverse adjusting assembly is used for adjusting the distance between the second reverse butt piece and the central axis of the second guide rod, the second reverse adjusting assembly comprises a second reverse sliding block, a second reverse auxiliary sliding block, a second reverse adjusting piece and a second reverse spring, the second reverse spring is elastic, a second reverse accommodating cavity is formed in the rack seat, the second reverse sliding block, the second reverse auxiliary sliding block and the second reverse spring are located in the second reverse accommodating cavity, the second reverse sliding block is fixed with the second reverse butt piece, the second reverse adjusting piece is in threaded connection with the rack seat, the rack seat is abutted to the second reverse auxiliary sliding block, the second reverse auxiliary sliding block is abutted to the second reverse sliding block, the second reverse spring is connected between the second reverse sliding block and the second reverse accommodating cavity, the direction of the second spring is in the second reverse accommodating cavity, and the second reverse sliding block is in the second direction of the second reverse butt piece, and the second reverse guide rod is in the second direction of the second guide rod is opposite to the second guide rod, and the second guide rod is in the direction of the second guide rod is opposite to the second guide rod.

Compared with the prior art, the application has the beneficial effects that:

1. in the scheme of the application, the rack seat and the driving device are arranged, the rack is arranged on the rack seat, meanwhile, the first driving component controls the rack seat to move along the length direction of the rack seat, the second driving component controls the rack seat to move along the width direction of the rack seat, so that the rack seat can move along the length direction and the width direction of the rack seat, the matched gear can rotate around the rotating shaft besides rotating, the rotating shaft is perpendicular to the moving plane of the rack seat, and the moving plane of the rack seat is a moving plane formed by the movement of the rack seat along the length direction and the movement of the width direction, so that the first driving component and the second driving component are controlled, and the gear is controlled to rotate around the rotating shaft, so that the meshing test can be performed on curved-track racks with various curvature radiuses on the premise of not changing the rack, the test cost is reduced, the workload of an operator is reduced, and the rack is not required to be changed;

2. further, through setting up first lead screw and second lead screw, make first motor drive first lead screw rotate, second motor drive second lead screw rotate, and then, under the effect of first motor drive, and be screw drive between first lead screw and the rack seat, make first lead screw drive rack seat move along its length direction, and the second slider is along the synchronous motion of the removal of its length direction along the rack seat, simultaneously, under the effect of second motor drive, and be screw drive between second lead screw and the rack seat, make second lead screw drive rack seat move along its width direction, and first slider is along its width direction and synchronous motion along with the rack seat, so, the operator through controlling the rotation of first motor and second motor, can further improve the accuracy to rack seat motion control, thereby do benefit to the progression of curved track meshing test;

3. Furthermore, by arranging the first guide rod and arranging the first guide hole matched with the first guide rod on the rack seat, when the first screw rod rotates to drive the rack seat to move, the first guide rod can play a role in guiding, so that the rack seat can be prevented from rotating along with the first screw rod, the rack seat can be prevented from tilting, and the stability of the rack seat when being driven is improved; the second guide rod is arranged, and the second guide hole matched with the second guide rod is formed in the rack seat, so that the second guide rod can play a guide role when the second screw rod rotates to drive the rack seat to move, the rack seat can be prevented from rotating along with the second screw rod, the rack seat can be prevented from tilting, and the stability of the rack seat when being driven is improved;

4. further, through setting up first forward rack and first reverse rack on first guide arm, and first forward groove and first reverse groove, set up first forward piece and first reverse piece of supporting in first guide hole simultaneously, and set up second forward rack and second reverse rack on the second guide arm, and second forward groove and second reverse groove, set up second forward piece and second reverse piece of supporting in the second guide hole simultaneously, so, through control first guide arm and second guide arm, be convenient for control the direction of motion of rack seat, the control rack seat is along the direction of motion of predetermineeing, and then further improved the accuracy of control rack seat when removing, can prevent that the rack seat from being along predetermineeing the direction and do reverse movement.

Drawings

FIG. 1 is a schematic diagram of a rack and pinion engagement test apparatus according to one embodiment of the present application, in which a rack and pinion are engaged;

FIG. 2 is a schematic view of a rack and pinion engagement test apparatus according to another embodiment of the present application from another perspective;

FIG. 3 is a schematic view of an embodiment of a curved track rack and pinion engagement testing apparatus according to the present application;

FIG. 4 is a schematic view of a rack seat in one embodiment of a rack and pinion engagement test apparatus of the present application;

FIG. 5 is a schematic cross-sectional view of a first guide bar in one embodiment of a curved track rack and pinion engagement testing apparatus of the present application;

FIG. 6 is a schematic view of a partial cross-sectional structure of a curved track rack and pinion engagement testing apparatus of one embodiment of the present application, with a first forward rack engaged with a first forward abutment;

FIG. 7 is a schematic view of a partial cross-sectional view of a curved track rack and pinion engagement testing apparatus of one embodiment of the present application with a first reverse rack engaged with a first reverse abutment;

FIG. 8 is a schematic cross-sectional view of a second guide bar in one embodiment of a curved track rack and pinion engagement testing apparatus of the present application;

FIG. 9 is a schematic view of a partial cross-sectional view of a second forward rack engaging a second forward abutment in one embodiment of a curved track rack and pinion engagement test apparatus according to the present application;

FIG. 10 is a schematic view of a partial cross-sectional view of a second reverse rack engaging a second reverse abutment in one embodiment of a curved track rack and pinion engagement test apparatus according to the present application;

FIG. 11 is an enlarged schematic view of the portion A of FIG. 6 of a curved track rack and pinion engagement test apparatus according to the present application;

FIG. 12 is an enlarged schematic view of the portion B of FIG. 7 of a curved track rack and pinion engagement testing apparatus of the present application;

FIG. 13 is an enlarged schematic view of the portion C of FIG. 9 of a curved track rack and pinion engagement test apparatus according to the present application;

FIG. 14 is an enlarged schematic view of the portion D of FIG. 10 of a curved track rack and pinion engagement testing apparatus in accordance with the present application;

FIG. 15 is a schematic view of a partial cross-sectional configuration of one embodiment of a curved track rack and pinion engagement testing apparatus of the present application at a first forward adjustment assembly;

FIG. 16 is a schematic view of a partial cross-sectional configuration of one embodiment of a curved track rack and pinion engagement testing apparatus of the present application at a first counter-adjustment assembly;

FIG. 17 is a schematic view of a partial cross-sectional configuration of one embodiment of a curved track rack and pinion engagement testing apparatus of the present application at a second forward adjustment assembly;

FIG. 18 is a schematic view of a partial cross-sectional configuration of one embodiment of a curved track rack and pinion engagement testing apparatus of the present application at a second counter-adjustment assembly;

the figures indicate: 1-a rack seat, 2-a driving device, 3-a first driving component, 4-a second driving component, 5-a rack, 6-a base, 7-a first motor, 8-a first lead screw, 9-a second motor, 10-a second lead screw, 11-a first guide rail, 12-a first slider, 13-a second guide rail, 14-a second slider, 15-a first sub-guide rail, 16-a first sub-slider, 17-a second sub-guide rail, 18-a second sub-slider, 19-a first guide bar, 20-a first guide hole, 21-a second guide bar, 22-a second guide hole, 23-a first forward rack, 24-a first reverse rack, 25-a first forward abutment, 26-a first reverse abutment, 27-a first forward slot, 28-a first reverse slot, 29-second forward rack, 30-second reverse rack, 31-second forward abutment, 32-second reverse abutment, 33-second forward slot, 34-second reverse slot, 35-first forward abutment, 36-first forward abutment, 37-first reverse abutment, 38-first reverse abutment, 39-second forward abutment, 40-second forward abutment, 41-second reverse abutment, 42-second reverse abutment, 43-first forward slider, 44-first forward secondary slider, 45-first forward adjuster, 46-first forward spring, 47-first reverse slider, 48-first reverse secondary slider, 49-first reverse adjuster, 50-first reverse spring, 51-second forward slider, 52-second forward sub-slider, 53-second forward adjustment, 54-second forward spring, 55-second reverse slider, 56-second reverse sub-slider, 57-second reverse adjustment, 58-second reverse spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention.

Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, under the condition of no conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, or an azimuth or a positional relationship conventionally understood by those skilled in the art, such terms are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Example 1

Referring to fig. 1-4, the curved track gear-rack engagement test device provided in this embodiment includes a rack seat 1 and a driving device 2, the driving device 2 includes a first driving component 3 and a second driving component 4, the first driving component 3 is used for controlling the rack seat 1 to move along the length direction of the rack seat 1, the second driving component 4 is used for controlling the rack seat 1 to move along the width direction of the rack seat 1, a rack 5 is provided on the rack seat 1, the length direction of the rack 5 is in the same direction as the length direction of the rack seat 1, and the rack 5 is used for engaging with a gear.

In the application, by arranging the rack seat 1 and the driving device 2 and arranging the rack 5 on the rack seat 1, simultaneously, the first driving component 3 controls the rack seat 1 to move along the length direction of the rack seat 1, and the second driving component 4 controls the rack seat 1 to move along the width direction of the rack seat 1, so that the rack seat 1 can move along the length direction and the width direction simultaneously, and the matched gear can rotate around a rotating shaft besides rotating, the rotating shaft is perpendicular to the moving plane of the rack seat 1, the moving plane of the rack seat 1 is a moving plane formed by the movement of the rack seat 1 along the length direction and the width direction, thus, by controlling the first driving component 3 and the second driving component 4 and controlling the rotation of the gear around the rotating shaft of a user, the meshing test of the curved track gear rack 5 with various curvature radiuses can be performed, thereby reducing the testing cost and reducing the workload of an operator without changing the rack 5;

Specifically, the displacement of the rack seat 1 along the length direction is y, the displacement of the rack seat 1 along the width direction is x, the rotation angle of the gear when rotating around the rotating shaft is alpha, the curvature radius of the curved rail is r, and the requirements are satisfied，。

As a preferred technical scheme of the application, the curved track gear rack engagement test device further comprises a base 6, the first driving assembly 3 comprises a first motor 7 and a first screw rod 8, the first screw rod 8 is matched with the rack seat 1, and the first motor 7 is used for driving the first screw rod 8 to rotate;

the second driving assembly 4 comprises a second motor 9 and a second lead screw 10, the second lead screw 10 is matched with the rack seat 1, and the second motor 9 is used for driving the second lead screw 10 to rotate;

the first driving assembly 3 further comprises a first guide rail 11 and a first sliding block 12, the first motor 7 is installed on the first sliding block 12, and the first sliding block 12 can move along the length direction of the first guide rail 11;

the second driving assembly 4 further comprises a second guide rail 13 and a second slide block 14, the second motor 9 is mounted on the second slide block 14, and the second slide block 14 can move along the length direction of the second guide rail 13;

The first guide rail 11 and the second guide rail 13 are both fixed on the base 6.

Further, through setting up first lead screw 8 and second lead screw 10 for first lead screw 8 rotation is driven to first motor 7, second lead screw 10 rotation is driven to second motor 9, and then, under the effect of first motor 7 drive, and be screw drive between first lead screw 8 and the rack seat 1, make first lead screw 8 drive rack seat 1 remove along its length direction, and second slider 14 moves along with the removal of rack seat 1 along its length direction and synchronous, simultaneously, under the effect of second motor 9 drive, and be screw drive between second lead screw 10 and the rack seat 1, make second lead screw 10 drive rack seat 1 remove along its width direction, and first slider 12 moves along its width direction and synchronous along with rack seat 1, so, the operator can further improve the accuracy to rack seat 1 motion control through controlling the rotation of first motor 7 and second motor 9, thereby be favorable to the going on of curved track meshing test.

As a preferred technical solution of the present application, the first driving assembly 3 further includes a first auxiliary rail 15 and a first auxiliary slide block 16, where the first auxiliary rail 15 is fixed on the base 6, and the first auxiliary slide block 16 can move along the length direction of the first auxiliary rail 15, the first auxiliary slide block 16 is rotationally connected with the first lead screw 8, and the first slide block 12 and the first auxiliary slide block 16 synchronously move in the same direction;

The second driving assembly 4 further comprises a second auxiliary guide rail 17 and a second auxiliary sliding block 18, the second auxiliary guide rail 17 is fixed on the base 6, the second auxiliary sliding block 18 can move along the length direction of the second auxiliary guide rail 17, the second auxiliary sliding block 18 is rotationally connected with the second screw rod 10, and the second sliding block 14 and the second auxiliary sliding block 18 synchronously move in the same direction.

Further, by providing the first sub rail 15 and the first sub slider 16, when the second motor 9 drives the rack housing 1 to move in the width direction thereof, the first sub slider 16 moves in synchronization with the first slider 12, so that the stability of the rack housing 1 when moving in the width direction thereof can be improved; and by providing the second sub-guide rail 17 and the second sub-slider 18, when the first motor 7 drives the rack housing 1 to move along the length direction thereof, the second sub-slider 18 moves synchronously with the second slider 14, so that the stability of the rack housing 1 when moving along the length direction thereof can be improved.

As a preferred solution of the present application, the first driving assembly 3 further includes a first guiding rod 19, a first guiding hole 20 is provided on the rack seat 1, the first guiding rod 19 is adapted to the first guiding hole 20, one end of the first guiding rod 19 is connected to the first slider 12, and the other end of the first guiding rod 19 is connected to the first auxiliary slider 16.

Further, through setting up first guide arm 19 to be provided with on rack seat 1 with first guide hole 20 of first guide arm 19 looks adaptation, when first lead screw 8 is rotatory in order to drive rack seat 1 and remove, first guide arm 19 can play the guide effect, can prevent rack seat 1 and take place the rotation along with first lead screw 8, can prevent rack seat 1 self slope, thereby improve the stability when rack seat 1 is driven.

As a preferred solution of the present application, the second driving assembly 4 further includes a second guiding rod 21, a second guiding hole 22 is provided on the rack seat 1, the second guiding rod 21 is adapted to the second guiding hole 22, one end of the second guiding rod 21 is connected to the second slider 14, and the other end of the second guiding rod 21 is connected to the second auxiliary slider 18.

Further, by arranging the second guide rod 21 and arranging the second guide hole 22 which is matched with the second guide rod 21 on the rack seat 1, when the second lead screw 10 rotates to drive the rack seat 1 to move, the second guide rod 21 can play a guiding role, the rack seat 1 can be prevented from rotating along with the second lead screw 10, the rack seat 1 can be prevented from tilting, and therefore the stability of the rack seat 1 when being driven is improved.

Example two

On the basis of the first technical solution of the embodiment, further, referring to fig. 5 to 10, the first guiding rod 19 is provided with a first forward rack 23 and a first reverse rack 24, and the length direction of the first forward rack 23 and the length direction of the first reverse rack 24 are both in the same direction as the length direction of the first guiding rod 19; the first guide hole 20 is internally provided with a first forward abutting piece 25 and a first reverse abutting piece 26, the first forward abutting piece 25 and the first reverse abutting piece 26 are elastic, the first guide rod 19 is further provided with a first forward groove 27 and a first reverse groove 28, the first guide rod 19 is rotatably connected with the first sliding block 12 and the first auxiliary sliding block 16, when the first forward rack 23 is matched with the first forward abutting piece 25, the first reverse abutting piece 26 is matched with the first reverse groove 28, and when the first reverse rack 24 is matched with the first reverse abutting piece 26, the first forward abutting piece 25 is matched with the first forward groove 27;

on the basis that the first forward rack 23 is matched with the first forward abutting piece 25, the first motor 7 forwards rotates and drives the rack seat 1 to positively move in a single direction along the length direction of the rack seat 1, all parts on the first forward rack 23 sequentially pass through the first forward abutting piece 25, the first reverse abutting piece 26 moves in the first reverse groove 28, and when the first motor 7 reversely rotates, the first forward abutting piece 25 abuts against the first forward rack 23 to resist the rack seat 1 to reversely move along the length direction of the rack seat 1;

On the basis that the first reverse rack 24 is matched with the first reverse abutting piece 26, the first motor 7 reverses and drives the rack seat 1 to move in a reverse single direction along the length direction of the rack seat 1, each part on the first reverse rack 24 sequentially passes through the first reverse abutting piece 26, the first forward abutting piece 25 moves in the first forward groove 27, and when the first motor 7 rotates forward, the first reverse abutting piece 26 abuts against the first reverse rack 24 to resist forward movement of the rack seat 1 along the length direction of the rack seat 1.

Further, by providing the first forward rack 23 and the first reverse rack 24, and the first forward slot 27 and the first reverse slot 28 on the first guide rod 19, and simultaneously providing the first forward abutment 25 and the first reverse abutment 26 in the first guide hole 20, such that when the first forward rack 23 is matched with the first forward abutment 25, the rack seat 1 is driven by the first motor 7 to move in a forward direction along the length direction thereof, the rack seat 1 is prevented from moving in a reverse direction along the length direction thereof, and when the first forward rack 23 sequentially passes through the first forward abutment 25, the first forward abutment 25 is elastically deformed, thereby ensuring that the first forward rack 23 smoothly passes through the first forward abutment 25; meanwhile, when the first reverse rack 24 is matched with the first reverse abutting piece 26, the rack seat 1 moves in a reverse single direction along the length direction of the rack seat 1 under the drive of the first motor 7, so that the rack seat 1 can be prevented from moving forward along the length direction of the rack seat, and when the first reverse rack 24 sequentially passes through the first reverse abutting piece 26, the first reverse abutting piece 26 is elastically deformed, so that the first reverse rack 24 can smoothly pass through the first reverse abutting piece 26; in the present application, the movement direction of the rack housing 1 is opposite when the rack housing 1 moves in a forward direction and in a reverse direction along the length direction thereof.

As a preferred technical solution of the present application, the second guiding rod 21 is provided with a second forward rack 29 and a second reverse rack 30, and the length direction of the second forward rack 29 and the length direction of the second reverse rack 30 are both in the same direction as the length direction of the second guiding rod 21; a second forward abutting piece 31 and a second reverse abutting piece 32 are arranged in the second guide hole 22, the second forward abutting piece 31 and the second reverse abutting piece 32 are elastic, a second forward groove 33 and a second reverse groove 34 are also arranged in the second guide rod 21, the second guide rod 21 is rotatably connected with the second sliding block 14 and the second auxiliary sliding block 18, when the second forward rack 29 is matched with the second forward abutting piece 31, the second reverse abutting piece 32 is matched with the second reverse groove 34, and when the second reverse rack 30 is matched with the second reverse abutting piece 32, the second forward abutting piece 31 is matched with the second forward groove 33;

on the basis that the second forward rack 29 is matched with the second forward abutting piece 31, the second motor 9 rotates forward and drives the rack seat 1 to move forward in a single direction along the width direction of the rack seat 1, all parts on the second forward rack 29 sequentially pass through the second forward abutting piece 31, the second reverse abutting piece 32 moves in the second reverse groove 34, and when the second motor 9 rotates reversely, the second forward abutting piece 31 abuts against the second forward rack 29 so as to resist the rack seat 1 to move reversely along the width direction of the rack seat 1;

On the basis that the second reverse rack 30 is matched with the second reverse abutting piece 32, the second motor 9 reverses and drives the rack seat 1 to move in a reverse single direction along the width direction of the rack seat 1, each part on the second reverse rack 30 sequentially passes through the second reverse abutting piece 32, the second forward abutting piece 31 moves in the second forward groove 33, and when the second motor 9 rotates forward, the second reverse abutting piece 32 abuts against the second reverse rack 30 to resist forward movement of the rack seat 1 along the width direction of the rack seat 1.

Further, by providing the second forward rack 29 and the second reverse rack 30, and the second forward groove 33 and the second reverse groove 34 on the second guide rod 21, and simultaneously providing the second forward abutment 31 and the second reverse abutment 32 in the second guide hole 22, such that when the second forward rack 29 is engaged with the second forward abutment 31, the rack housing 1 is moved in a forward direction in the width direction thereof by the driving of the second motor 9, the rack housing 1 is prevented from being moved in a reverse direction in the width direction thereof, and when the second forward rack 29 sequentially passes through the second forward abutment 31, the second forward abutment 31 is elastically deformed, thereby ensuring that the second forward rack 29 smoothly passes through the second forward abutment 31; meanwhile, when the second reverse rack 30 is matched with the second reverse abutting piece 32, the rack seat 1 moves in a reverse single direction along the width direction under the drive of the second motor 9, so that the rack seat 1 can be prevented from moving forward along the width direction, and when the second reverse rack 30 sequentially passes through the second reverse abutting piece 32, the second reverse abutting piece 32 is elastically deformed, so that the second reverse rack 30 can smoothly pass through the second reverse abutting piece 32; in the present application, the movement direction of the rack housing 1 is opposite when the rack housing 1 moves in the forward direction and the reverse direction in the width direction.

In this way, by controlling the first guiding rod 19 and the second guiding rod 21, it is convenient to control the movement direction of the rack seat 1, specifically, when changing the movement direction of the rack seat 1, when changing the situation that the first forward rack 23 is matched with the first forward abutting piece 25 to the situation that the first reverse rack 24 is matched with the first reverse abutting piece 26, the first guiding rod 19 is rotated by taking the central axis of the first guiding rod 19 as the rotation axis, so that the first forward abutting piece 25 is matched with the first forward groove 27, the first reverse abutting piece 26 is matched with the first reverse rack 24, and when the first forward abutting piece 25 transitions from the first forward rack 23 to the first forward groove 27, the side edge of the first forward abutting piece 25 is contacted with an arc transition surface, so that the first forward abutting piece 25 is elastically deformed in the process of rotating the first guiding rod 19, and similarly, the first reverse abutting piece 26 is similar to the first forward abutting piece 25;

when the situation that the second forward rack 29 is matched with the second forward abutting piece 31 is changed into the situation that the second reverse rack 30 is matched with the second reverse abutting piece 32, the second guide rod 21 is rotated by taking the central axis of the second guide rod 21 as a rotation axis, the second forward abutting piece 31 is matched with the second forward groove 33, the second reverse abutting piece 32 is matched with the second reverse rack 30, and when the second forward abutting piece 31 is transited from the second forward rack 29 to the second forward groove 33, the side edges of the second forward abutting piece 31 are all arc transition surfaces, so that the second forward abutting piece 31 is elastically deformed in the process of rotating the second guide rod 21, and similarly, the second reverse abutting piece 32 is similar to the second forward abutting piece 31;

Through controlling the direction of motion of rack seat 1, the control rack seat 1 of being convenient for moves along the direction of motion of predetermineeing, and then further improved the accuracy when controlling rack seat 1 and removed, can prevent rack seat 1 and do reverse movement along the direction of predetermineeing.

As a preferred embodiment of the present application, a surface of the first forward rack 23, which is used to abut against the first forward abutment 25, is a first forward abutment surface 35, a surface of the first forward rack 23, which is used to pass through the first forward abutment 25, is a first forward passing surface 36, an included angle formed by the first forward abutment surface 35 and the length direction of the first guide rod 19 is a, and an included angle formed by the first forward passing surface 36 and the length direction of the first guide rod 19 is b;

said a is less than 90 ° and said b is less than said a;

a first reverse abutment surface 37 is disposed on a surface of the first reverse rack 24 for abutting against the first reverse abutment piece 26, a first reverse passing surface 38 is disposed on a surface of the first reverse rack 24 for passing through the first reverse abutment piece 26, an included angle formed by the first reverse abutment surface 37 and the length direction of the first guide rod 19 is c, and an included angle formed by the first reverse passing surface 38 and the length direction of the first guide rod 19 is d;

Said c is less than 90 °, and said d is less than said c;

a second forward abutment surface 39 is disposed on a surface of the second forward rack 29 for abutting against the second forward abutment 31, a second forward passing surface 40 is disposed on a surface of the second forward rack 29 for passing through the second forward abutment 31, an included angle formed by the second forward abutment surface 39 and the length direction of the second guide rod 21 is e, and an included angle formed by the second forward passing surface 40 and the length direction of the second guide rod 21 is f;

said e is less than 90 °, and said f is less than said e;

a second reverse abutment surface 41 is disposed on a surface of the second reverse rack 30 for abutting against the second reverse abutment piece 32, a second reverse passing surface 42 is disposed on a surface of the second reverse rack 30 for passing through the second reverse abutment piece 32, an included angle formed by the second reverse abutment surface 41 and the length direction of the second guide rod 21 is g, and an included angle formed by the second reverse passing surface 42 and the length direction of the second guide rod 21 is h;

the g is less than 90 °, and the h is less than the g.

Further, by making a less than 90 ° and b less than a; c is less than 90 °, and d is less than c; e is less than 90 °, and f is less than e; and g is smaller than 90 degrees, h is smaller than g, so that when the first forward rack 23 is propped against the first forward propping piece 25, the first forward propping surface 35 and the first forward passing surface 36 can be matched to play a role in guiding, and the stability of the first forward propping piece 25 when propped against the first forward rack 23 is improved, so that the stability of the rack seat 1 when moving in one direction is improved; similarly, when the first reverse rack 24 abuts against the first reverse abutting piece 26, the first reverse abutting surface 37 and the first reverse passing surface 38 can be matched to play a role in guiding, so that the stability of the first reverse abutting piece 26 abutting against the first reverse rack 24 is improved, and the stability of the rack seat 1 in one direction is improved; similarly, when the second forward rack 29 abuts against the second forward abutting piece 31, the second forward abutting surface 39 and the second forward passing surface 40 can be matched to play a role in guiding, so that the stability of the second forward abutting piece 31 abutting against the second forward rack 29 is improved, and the stability of the rack seat 1 in one direction is improved; when the second reverse rack 30 abuts against the second reverse abutment piece 32, the second reverse abutment surface 41 and the second reverse passing surface 42 can cooperate to perform a guiding function, so that the stability of the second reverse abutment piece 32 abutting against the second reverse rack 30 is improved, and the stability of the rack seat 1 moving in one direction is improved.

As a preferred technical solution of the present application, the first guide hole 20 is further provided with a first forward adjusting component, the first forward adjusting component is used for adjusting the distance between the first forward supporting piece 25 and the central axis of the first guide rod 19, the first forward adjusting component includes a first forward sliding block 43, a first forward auxiliary sliding block 44, a first forward adjusting piece 45 and a first forward spring 46, the first forward spring 46 has elasticity, a first forward accommodating cavity is provided in the rack seat 1, the first forward sliding block 43, a first forward auxiliary sliding block 44 and the first forward spring 46 are located in the first forward accommodating cavity, the first forward sliding block 43 is in threaded connection with the rack seat 1, the rack seat 1 abuts against the first forward auxiliary sliding block 44, the first forward sliding block 44 abuts against the first forward sliding piece 46, and the first forward sliding piece is driven by the first forward adjusting component, and the first forward sliding piece 45 is in collinearly-line with the first forward adjusting piece 25, and the first forward adjusting component is driven by the first forward adjusting piece 45, and the first forward adjusting piece is in a direction of the first forward adjusting component is aligned with the first forward adjusting piece 25;

The first guide hole 20 is further provided with a first reverse adjusting assembly, the first reverse adjusting assembly is used for adjusting the distance between the first reverse butt piece 26 and the central axis of the first guide rod 19, the first reverse adjusting assembly comprises a first reverse slider 47, a first reverse slider 48, a first reverse adjusting piece 49 and a first reverse spring 50, the first reverse spring 50 has elasticity, a first reverse accommodating cavity is arranged in the rack seat 1, the first reverse slider 47, the first reverse slider 48 and the first reverse spring 50 are positioned in the first reverse accommodating cavity, the first reverse slider 47 and the first reverse slider 26 are fixed with the first reverse butt piece 26, the first reverse adjusting piece 49 is in threaded connection with the rack seat 1, the rack seat 1 abuts against the first reverse slider 48, the first reverse slider 48 abuts against the first reverse slider 47, the first reverse slider 50 is connected with the first reverse accommodating cavity, and the first reverse slider 50 is in the first reverse slider seat is in a linear manner, and the first guide rod 26 is driven to move relative to the first guide rod 26 by the first reverse adjusting assembly, and the first guide rod 1 is in a linear manner when the first guide rod 26 is driven to move relative to the first guide rod 26;

The second guide hole 22 is further provided with a second forward adjusting component, the second forward adjusting component is used for adjusting the distance between the second forward butting piece 31 and the central axis of the second guide rod 21, the second forward adjusting component comprises a second forward sliding block 51, a second forward auxiliary sliding block 52, a second forward adjusting piece 53 and a second forward spring 54, the second forward spring 54 has elasticity, a second forward accommodating cavity is arranged in the rack seat 1, the second forward sliding block 51, the second forward auxiliary sliding block 52 and the second forward spring 54 are positioned in the second forward accommodating cavity, the second forward sliding block 51 is fixed with the second forward butting piece 31, the second forward adjusting piece 53 is in threaded connection with the rack seat 1, the second forward auxiliary sliding block 52 butts against the second forward sliding block 51, the second forward sliding block 51 and the second forward sliding piece 31 are driven by the second forward adjusting component, and the second forward sliding piece 31 is driven by the second forward adjusting component, and the second forward sliding piece is driven by the second forward adjusting component to move along the central axis of the second forward sliding block 31, and the second forward adjusting component is driven by the second forward sliding block 53;

The second guide hole 22 is further provided with a second reverse adjusting assembly, the second reverse adjusting assembly is used for adjusting the distance between the second reverse butt piece 32 and the central axis of the second guide rod 21, the second reverse adjusting assembly comprises a second reverse slider 55, a second reverse slider 56, a second reverse adjusting piece 57 and a second reverse spring 58, the second reverse spring 58 is elastic, a second reverse accommodating cavity is formed in the rack seat 1, the second reverse slider 55, the second reverse slider 56 and the second reverse spring 58 are located in the second reverse accommodating cavity, the second reverse slider 55 is fixed with the second reverse butt piece 32, the second reverse adjusting piece 57 is in threaded connection with the rack seat 1, the rack seat 1 is abutted against the second reverse slider 56, the second reverse slider 55 is abutted against the second reverse slider 55, the second reverse spring 58 is connected between the second reverse slider 55 and the second accommodating cavity, and the second reverse slider 58 is driven by the second reverse slider is in a linear manner, and the second guide rod 32 is driven by the second reverse slider 58, and the second guide rod is in a linear manner, and the second guide rod 32 is driven to move relatively.

In this way, by adjusting the distance between the first forward abutting piece 25 and the central axis of the first guiding rod 19, the position on the first forward rack 23 contacted by the first forward abutting piece 25 when the first forward abutting piece 25 abuts against the first forward rack 23 can be adjusted, in the application, a is smaller than 90 degrees, b is smaller than a, so that the bending degree of the first forward abutting piece 25 when being abutted against can be changed, and similarly, the first reverse abutting piece 26, the second forward abutting piece 31 and the second reverse abutting piece 32 can also be adjusted, so that the buffer distance when the adjusting seat moves away from the preset direction can be adjusted, thereby further improving the accuracy of controlling the movement of the rack seat 1, and on the basis of preventing the rack seat 1 from moving reversely along the preset direction, the rack seat 1 has a buffer function within a range which can be allowed to deviate from the preset direction, and the strength of the buffer function can be manually adjusted.

Further, tracks required for moving the first forward slider 43, the first forward sub-slider 44, the first reverse slider 47, the first reverse sub-slider 48, the second forward slider 51, the second forward sub-slider 52, the second reverse slider 55 and the second reverse sub-slider 56 are provided in the rack housing 1, so that the respective moving directions thereof are defined.

The above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail in the present specification with reference to the above embodiments, the present invention is not limited to the above specific embodiments, and thus any modifications or equivalent substitutions are made to the present invention; all technical solutions and modifications thereof that do not depart from the spirit and scope of the invention are intended to be included in the scope of the appended claims.

Claims

1. A curved track rack and pinion meshing test device is characterized in that: the device comprises a rack seat and a driving device, wherein the driving device comprises a first driving component and a second driving component, the first driving component is used for controlling the rack seat to move along the length direction of the rack seat, the second driving component is used for controlling the rack seat to move along the width direction of the rack seat, a rack is arranged on the rack seat, the length direction of the rack is in the same direction as the length direction of the rack seat, and the rack is used for being meshed with a gear;

the rack seat can move along the length direction and the width direction at the same time, the gear can rotate around the rotating shaft besides rotating, the rotating shaft is perpendicular to the moving plane of the rack seat, and the moving plane of the rack seat is a moving plane formed by the movement of the rack seat along the length direction and the movement of the rack seat along the width direction;

Specifically, the displacement of the rack seat along the length direction is y, the displacement of the rack seat along the width direction is x, the rotation angle of the gear when rotating around the rotating shaft is alpha, the curvature radius of the curved rail is r, and the requirements are satisfied，。

2. The curved track rack and pinion engagement testing apparatus of claim 1, wherein: the bent rail gear-rack engagement test device further comprises a base, the first driving assembly comprises a first motor and a first lead screw, the first lead screw is matched with the rack seat, and the first motor is used for driving the first lead screw to rotate;

The first guide rail and the second guide rail are both fixed on the base.

3. A curved track rack and pinion engagement testing apparatus as defined in claim 2 wherein: the first driving assembly further comprises a first auxiliary guide rail and a first auxiliary sliding block, the first auxiliary guide rail is fixed on the base, the first auxiliary sliding block can move along the length direction of the first auxiliary guide rail, the first auxiliary sliding block is rotationally connected with the first lead screw, and the first sliding block and the first auxiliary sliding block synchronously move in the same direction;

4. A curved track rack and pinion engagement testing apparatus as defined in claim 3 wherein: the first driving assembly further comprises a first guide rod, a first guide hole is formed in the rack seat, the first guide rod is matched with the first guide hole, one end of the first guide rod is connected to the first sliding block, and the other end of the first guide rod is connected to the first auxiliary sliding block.

5. The curved track rack and pinion engagement testing apparatus of claim 4 wherein: the second driving assembly further comprises a second guide rod, a second guide hole is formed in the rack seat, the second guide rod is matched with the second guide hole, one end of the second guide rod is connected to the second sliding block, and the other end of the second guide rod is connected to the second auxiliary sliding block.

6. The curved track rack and pinion engagement testing apparatus of claim 5 wherein: the first guide rod is provided with a first forward rack and a first reverse rack, and the length direction of the first forward rack and the length direction of the first reverse rack are both in the same direction with the length direction of the first guide rod; the first guide hole is internally provided with a first forward abutting piece and a first reverse abutting piece, the first forward abutting piece and the first reverse abutting piece are elastic, the first guide hole is internally provided with a first forward groove and a first reverse groove, the first guide rod is rotationally connected with the first sliding block and the first auxiliary sliding block, when the first forward rack is matched with the first forward abutting piece, the first reverse abutting piece is matched with the first reverse groove, and when the first reverse rack is matched with the first reverse abutting piece, the first forward abutting piece is matched with the first forward groove;

On the basis that the first forward rack is matched with the first forward abutting piece, the first motor rotates forward and drives the rack seat to move in a forward single direction along the length direction of the rack seat, all parts on the first forward rack sequentially pass through the first forward abutting piece, all parts on the first reverse rack sequentially pass through the first reverse groove, and when the first motor rotates reversely, the first forward abutting piece abuts against the first forward rack to resist the rack seat to move reversely along the length direction of the rack seat;

and on the basis of the cooperation of the first reverse rack and the first reverse abutting piece, the first motor reversely rotates and drives the rack seat to move in a reverse single direction along the length direction of the rack seat, all parts on the first reverse rack sequentially pass through the first reverse abutting piece, all parts on the first forward rack sequentially pass through the first forward groove, and when the first motor rotates positively, the first reverse abutting piece abuts against the first reverse rack so as to resist forward movement of the rack seat along the length direction of the rack seat.

7. The curved track rack and pinion engagement testing apparatus of claim 6 wherein: the second guide rod is provided with a second forward rack and a second reverse rack, and the length direction of the second forward rack and the length direction of the second reverse rack are both in the same direction with the length direction of the second guide rod; the second guide hole is internally provided with a second positive abutting piece and a second reverse abutting piece, the second positive abutting piece and the second reverse abutting piece are elastic, the second guide hole is internally provided with a second positive groove and a second reverse groove, the second guide rod is rotationally connected with the second sliding block and the second auxiliary sliding block, when the second positive rack is matched with the second positive abutting piece, the second reverse abutting piece is matched with the second reverse groove, and when the second reverse rack is matched with the second reverse abutting piece, the second positive abutting piece is matched with the second positive groove;

On the basis that the second forward rack is matched with the second forward abutting piece, the second motor rotates forward and drives the rack seat to move forward in a single direction along the width direction of the rack seat, all parts on the second forward rack sequentially pass through the second forward abutting piece, all parts on the second reverse rack sequentially pass through the second reverse groove, and when the second motor rotates reversely, the second forward abutting piece abuts against the second forward rack to resist the rack seat to move reversely along the width direction of the rack seat;

and on the basis that the second reverse rack is matched with the second reverse abutting piece, the second motor reversely rotates and drives the rack seat to move in a reverse single direction along the width direction of the rack seat, all parts on the second reverse rack sequentially pass through the second reverse abutting piece, all parts on the second forward rack sequentially pass through the second forward groove, and when the second motor positively rotates, the second reverse abutting piece abuts against the second reverse rack so as to resist forward movement of the rack seat along the width direction of the rack seat.

8. The curved track rack and pinion engagement testing apparatus of claim 7 wherein: one surface of the first forward rack, which is used for propping against the first forward propping piece, is a first forward propping surface, one surface of the first forward rack, which is used for passing through the first forward propping piece, is a first forward passing surface, an included angle formed by the first forward propping surface and the length direction of the first guide rod is a, and an included angle formed by the first forward passing surface and the length direction of the first guide rod is b;

Said a is less than 90 ° and said b is less than said a;

said c is less than 90 °, and said d is less than said c;

said e is less than 90 °, and said f is less than said e;

The g is less than 90 °, and the h is less than the g.

9. The curved track rack and pinion engagement testing apparatus of claim 8 wherein:

the first guide hole is also provided with a first forward adjusting component, the first forward adjusting component is used for adjusting the distance between the first forward butting piece and the central axis of the first guide rod, the first forward adjusting component comprises a first forward sliding block, a first forward auxiliary sliding block, a first forward adjusting piece and a first forward spring, the first forward spring is elastic, a first forward accommodating cavity is arranged in the rack seat, the first forward sliding block, the first forward auxiliary sliding block and the first forward spring are positioned in the first forward accommodating cavity, the first forward sliding block is fixed with the first forward butting piece, the first forward adjusting piece is in threaded connection with the rack seat, the rack seat is abutted against the first forward auxiliary sliding block, the first forward sliding block is abutted against the first forward sliding block, a first forward accommodating cavity is connected with the first forward sliding block, the first forward spring is positioned in the first forward accommodating cavity, and the first forward sliding block is in a direction opposite to the first forward adjusting piece, and the first forward adjusting piece is in a direction opposite to the first forward adjusting piece, and the first forward adjusting component is driven by the first forward adjusting piece, and the first forward adjusting piece is in a direction opposite direction to the first forward adjusting piece, and the first forward adjusting piece is moved;