CN217583052U

CN217583052U - Gear box and travelling car

Info

Publication number: CN217583052U
Application number: CN202122409797.9U
Authority: CN
Inventors: 冯消冰; 袁俊强; 李军旗
Original assignee: Beijing Bo Tsing Technology Co Ltd
Current assignee: Beijing Bo Tsing Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-10-14
Anticipated expiration: 2031-09-30

Abstract

The utility model provides a gear box and travelling car, include: a box body; the transmission structure comprises an input gear, two gear sets and two output shafts, the two gear sets are in one-to-one corresponding connection with the two output shafts, and the input gear is in driving connection with the two gear sets so as to drive the two output shafts to synchronously rotate; wherein, the transmission structure is two, and two transmission structures set up on the box side by side, and two transmission structure's four output shafts are parallel arrangement all. The two output shafts are driven to synchronously rotate through one input gear, so that the size required by a transmission structure arranged in the box body is reduced. And, four output shafts of two transmission structures that set up on the box are parallel, through adjusting the input rotational speed of the input gear of two transmission structures respectively, can reach the purpose of two transmission structure differentials to make the gear box can be applicable to multiple different use condition.

Description

Gear box and travelling car

Technical Field

The utility model relates to a gear drive technical field particularly, relates to a gear box and travelling car.

Background

For the gear box in the prior art, the transmission structure usually adopts a form that a single input gear corresponds to a single output shaft, or two input gears correspond to two output shafts respectively, the transmission of the gear box is single, and the size of the transmission structure is large, so that the whole gear box is large in size and heavy, and the use of the gear box is limited, and the gear box cannot be used as a power output mechanism of a moving trolley and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gear box and travelling car to gear box transmission structure is single among the solution prior art, the limited problem of service environment.

In order to solve the above problem, according to the utility model discloses an aspect, the utility model provides a gear box, include: a box body; the transmission structure comprises an input gear, two gear sets and two output shafts, the two gear sets are in one-to-one corresponding connection with the two output shafts, and the input gear is in driving connection with the two gear sets so as to drive the two output shafts to synchronously rotate; wherein, transmission structure is two, and two transmission structures set up side by side on the box, and two transmission structure's four output shafts are parallel arrangement all.

Furthermore, the gear set comprises a rotating shaft, a first output gear, a second output gear and a third output gear, the rotating shaft and the output shaft are arranged in parallel, the first output gear and the second output gear are both arranged on the rotating shaft, and the third output gear is arranged on the output shaft; wherein the input gear is meshed with the second output gear, and the first output gear is meshed with the third output gear.

Furthermore, the rotating shaft and the first output gear are of an integral structure, the number of teeth of the input gear and the number of teeth of the first output gear are both smaller than the number of teeth of the second output gear, and the number of teeth of the third output gear is larger than the number of teeth of the first output gear.

Furthermore, an input gear in the transmission structure is positioned between the two gear sets, two output shafts of the transmission structure are respectively a first driving shaft and a second driving shaft, and the rotation directions and the rotation speeds of the first driving shaft and the second driving shaft are the same; the axes of the two first driving shafts of the two transmission structures are overlapped, and the axes of the two second driving shafts of the two transmission structures are overlapped.

Furthermore, the gear box is provided with a preset symmetry plane, the axis of the output shaft is perpendicular to the symmetry plane, and the two transmission structures are symmetrically arranged relative to the symmetry plane.

Further, the box includes main part, first supporting seat and second supporting seat, and the main part has and holds the chamber, and first supporting seat is two, and two first supporting seats set up respectively on two lateral walls of main part, and the intracavity is being held in the setting of second supporting seat, and the second supporting seat is located between two first supporting seats, and every first supporting seat supports input gear, gear train and the output shaft of a transmission structure, and the gear train and the output shaft of two transmission structures are supported to the second supporting seat.

Furthermore, the first supporting seat is provided with a first supporting hole and a second supporting hole, the transmission structure further comprises a first bearing and a second bearing, wherein the first bearing is arranged in the first supporting hole, the second bearing is arranged in the second bearing hole, one end of the output shaft penetrates through the first bearing, and one end of the rotating shaft penetrates through the second bearing.

Furthermore, the second supporting seat is provided with two third supporting holes and two fourth supporting holes, the gear box further comprises four third bearings and four fourth bearings, two third bearings are arranged in each third supporting hole, two fourth bearings are arranged in each fourth supporting hole, four rotating shafts of the two transmission structures penetrate into the four third bearings in a one-to-one correspondence mode, and four output shafts of the two transmission structures penetrate into the four fourth bearings in a one-to-one correspondence mode.

Further, transmission structure has the fixed part, is provided with the fixed slot on the lateral wall of main part, and the fixed part setting is in the fixed slot, and the fixed part includes first end cover and second end cover, first end cover and first bearing butt, second end cover and second bearing butt.

Further, main part, first supporting seat and second supporting seat structure as an organic whole, the box still includes the top cap, top cap and main part fixed connection.

According to the utility model discloses a further aspect, the utility model provides a travelling car, travelling car include frame, two drive division, four wheels and foretell gear box, and gear box and two drive divisions all set up on the frame, and two input gear one-to-ones of two drive divisions and gear box are connected, and four wheels set up on four output shafts of gear box one-to-ones.

Use the technical scheme of the utility model, a gear box is provided, include: a box body; the transmission structure comprises an input gear, two gear sets and two output shafts, the two gear sets are in one-to-one corresponding connection with the two output shafts, and the input gear is in driving connection with the two gear sets so as to drive the two output shafts to synchronously rotate; wherein, the transmission structure is two, and two transmission structures set up on the box side by side, and two transmission structure's four output shafts are parallel arrangement all. By adopting the scheme, the two gear sets are driven simultaneously through the input gear, and the synchronous rotation of the two output shafts is realized by the transmission of the two gear sets, so that the size required by the transmission structure arranged in the box body is reduced, and the structure in the box body is more compact. And, four output shafts of two transmission structures that set up on the box are parallel, through adjusting the input rotational speed of the input gear of two transmission structures respectively, can reach the purpose of two transmission structure differentials to make the gear box can be applicable to the use operating mode of multiple difference.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a gearbox provided by an embodiment of the present invention;

FIG. 2 shows a cross-sectional view of the gearbox of FIG. 1;

FIG. 3 shows an assembly schematic of two transmission structures in the gearbox of FIG. 1;

FIG. 4 shows a schematic view of one of the two transmission configurations of FIG. 3;

fig. 5 shows a schematic structural view of the casing of the gearbox of fig. 1.

Wherein the figures include the following reference numerals:

10. a box body; 11. a main body; 12. a first support base; 121. a first support hole; 122. a second support hole; 13. a second support seat; 131. a third support hole; 132. a fourth support hole; 14. a fixing groove; 15. a top cover; 20. a transmission structure; 21. an input gear; 22. a gear set; 221. a rotating shaft; 222. a first output gear; 223. a second output gear; 224. a third output gear; 23. an output shaft; 24. a first bearing; 25. a second bearing; 26. a fixed part; 261. a first end cap; 262. a second end cap; 30. a plane of symmetry; 41. a third bearing; 42. and a fourth bearing.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 5, an embodiment of the present invention provides a gearbox, including: a case 10; the transmission structure 20 comprises an input gear 21, two gear sets 22 and two output shafts 23, the two gear sets 22 are connected with the two output shafts 23 in a one-to-one correspondence manner, and the input gear 21 is in driving connection with the two gear sets 22 so as to drive the two output shafts 23 to synchronously rotate; wherein, transmission structure 20 is two, and two transmission structures 20 set up on box 10 side by side, and four output shafts 23 of two transmission structures 20 are all parallel arrangement.

In the embodiment, two gear sets 22 are driven simultaneously by one input gear 21, and the two output shafts 23 rotate synchronously by the transmission of the two gear sets 22, so that the size required for installing the transmission structure 20 in the box body 10 is reduced, and the structure in the box body 10 is more compact. In addition, the four output shafts 23 of the two transmission structures 20 arranged on the box body 10 are parallel, and the purpose of differential speed of the two transmission structures 20 can be achieved by respectively adjusting the input rotating speed of the input gear 21 of the two transmission structures 20, so that the gear box can be suitable for different use conditions.

Specifically, for one transmission structure 20, the input gear 21 is located between two gear sets 22, and two output shafts 23 of the transmission structure 20 rotate in the same direction and at the same speed, so that the reliability and stability of transmission can be ensured. The gear box is applied to a movable trolley, and the two output shafts 23 are respectively connected with the front wheel and the rear wheel of the trolley, so that the synchronous motion of the front wheel and the rear wheel can be realized, and the movement of the trolley can be realized.

As shown in fig. 2, the gear set 22 includes a rotating shaft 221, a first output gear 222, a second output gear 223 and a third output gear 224, the rotating shaft 221 and the output shaft 23 are arranged in parallel, the first output gear 222 and the second output gear 223 are both arranged on the rotating shaft 221, and the third output gear 224 is arranged on the output shaft 23; the input gear 21 and the second output gear 223 are engaged with each other, and the first output gear 222 and the third output gear 224 are engaged with each other. Through the arrangement, the matching transmission among the rotating shaft 221, the first output gear 222, the second output gear 223 and the third output gear 224 ensures the transmission precision of the gearbox, works reliably and has higher transmission efficiency.

Specifically, the rotating shaft 221 and the first output gear 222 are an integral structure, i.e., a gear shaft. The number of teeth of the input gear 21 and the number of teeth of the first output gear 222 are both smaller than the number of teeth of the second output gear 223, and the number of teeth of the third output gear 224 is larger than the number of teeth of the first output gear 222. By means of the arrangement, the effects of reducing the rotating speed and improving the torque can be achieved and the performance of the gear box can be improved by adjusting the relation among the tooth numbers of the input gear 21, the first output gear 222, the second output gear 223 and the third output gear 224.

Specifically, the rotating shaft 221 and the first output gear 222 are of an integral structure, a first key groove is formed in the rotating shaft 221, a second key groove is formed in the second output gear 223, and the second output gear 223 is in key connection with the rotating shaft 221; the output shaft 23 is provided with a third key groove, the third output gear 224 is provided with a fourth key groove, and the third output gear 224 is in key connection with the output shaft 23.

Further, the input gear 21 in the transmission structure 20 is located between two gear sets 22, two output shafts 23 of the transmission structure 20 are respectively a first driving shaft and a second driving shaft, and the rotation directions and the rotation speeds of the first driving shaft and the second driving shaft are the same; the axes of the two first drive shafts of the two transmission structures 20 coincide, and the axes of the two second drive shafts of the two transmission structures 20 coincide.

In this embodiment, the axes of the two first driving shafts coincide, the axes of the two second driving shafts coincide, and the four output shafts 23 are all arranged in parallel, so that mutual noninterference between the four output shafts 23 in the two transmission structures 20 is ensured, and the transmission reliability of the transmission structures 20 is ensured. Through the arrangement, the gear box is suitable for four-wheel moving trolleys.

Specifically, as shown in fig. 2, the gear box has a predetermined symmetry plane 30, the axis of the output shaft 23 is perpendicular to the symmetry plane 30, and the two transmission structures 20 are symmetrically arranged with respect to the symmetry plane 30. Set up like this for the axis of four output shafts 23 in two transmission structure 20 is located the coplanar, has guaranteed four output shaft 23 pivoted uniformity, makes the gear box can be applicable to the environmental condition of multiple difference.

Alternatively, when the four output shafts 23 are provided with wheels, the gearbox can be applied to the crawling robot body as a power output structure of the mobile trolley, and the rotation speeds of the two transmission structures 20 are different through differential adjustment of the two input gears 21 in the two transmission structures 20, so as to realize the steering of the trolley.

As shown in fig. 5, the box 10 includes a main body 11, two first supporting seats 12 and two second supporting seats 13, the main body 11 has a containing cavity, the number of the first supporting seats 12 is two, the two first supporting seats 12 are respectively disposed on two side walls of the main body 11, the second supporting seat 13 is disposed in the containing cavity, the second supporting seat 13 is located between the two first supporting seats 12, each first supporting seat 12 supports an input gear 21, a gear set 22 and an output shaft 23 of one transmission structure 20, and the second supporting seat 13 supports the gear set 22 and the output shaft 23 of the two transmission structures 20. With the above arrangement, the transmission structure 20 is supported in the accommodating cavity of the main body 11 through the first support seat 12 and the second support seat 13, so that the overall structure of the gear box is firmer.

Further, the first support base 12 has a first support hole 121 and a second support hole 122, and the transmission structure 20 further includes a first bearing 24 and a second bearing 25, wherein the first bearing 24 is disposed in the first support hole 121, the second bearing 25 is disposed in the second bearing 25, one end of the output shaft 23 passes through the first bearing 24, and one end of the rotating shaft 221 passes through the second bearing 25.

In the present embodiment, by providing the first support hole 121 and the second support hole 122, one end of the output shaft 23 and one end of the rotating shaft 221 can smoothly pass through the first support seat 12, which facilitates the installation and support of the output shaft 23 and the rotating shaft 221; through setting up first bearing 24 and second bearing 25, can play the effect of supporting output shaft 23 and pivot 221 respectively, can reduce the coefficient of friction of output shaft 23 and pivot 221 in the rotation process simultaneously, guarantee transmission efficiency.

Specifically, the second support seat 13 has two third support holes 131 and two fourth support holes 132, the gear box further includes four third bearings 41 and four fourth bearings 42, two third bearings 41 are provided in each third support hole 131, two fourth bearings 42 are provided in each fourth support hole 132, four rotating shafts 221 of the two transmission structures 20 penetrate into the four third bearings 41 in a one-to-one correspondence manner, and four output shafts 23 of the two transmission structures 20 penetrate into the four fourth bearings 42 in a one-to-one correspondence manner.

In this embodiment, by providing the third support hole 131 and the fourth support hole 132, the other end of the output shaft 23 and the other end of the rotating shaft 221 can smoothly pass through the second support seat 13, which facilitates the installation and support of the output shaft 23 and the rotating shaft 221; through setting up third bearing 41 and fourth bearing 42, can play the effect of supporting pivot 221 and output shaft 23 respectively, can reduce the coefficient of friction of output shaft 23 and pivot 221 in the rotation process simultaneously, guarantee transmission efficiency.

Specifically, the axis of the fourth support hole 132 coincides with the axis of the first support hole 121, and the axis of the third support hole 131 coincides with the axis of the second support hole 122, thereby ensuring that the output shaft 23 and the rotating shaft 221 can smoothly pass through.

Specifically, the third support hole 131 and the fourth support hole 132 are provided therein with a first inner limit ring and a second inner limit ring, respectively, two third bearings 41 disposed in the same third support hole 131 are disposed on both sides of the first inner limit ring and abut against the first inner limit ring, and two fourth bearings 42 disposed in the same fourth support hole 132 are disposed on both sides of the second inner limit ring and abut against the second inner limit ring, respectively. With this arrangement, the two third bearings 41 disposed in the same third support hole 131 or the two fourth bearings 42 disposed in the same fourth support hole 132 are prevented from interfering during movement, and reliability of the gear box is ensured.

Optionally, the third bearing 41 is in interference fit with the third supporting hole 131, and the fourth bearing 42 is in interference fit with the fourth supporting hole 132, so as to prevent the third bearing 41 and the fourth bearing 42 from moving during the movement of the transmission structure 20.

Further, the transmission structure 20 has a fixing portion 26, a fixing groove 14 is provided on a side wall of the main body 11, the fixing portion 26 is provided in the fixing groove 14, the fixing portion 26 includes a first end cover 261 and a second end cover 262, the first end cover 261 abuts against the first bearing 24, and the second end cover 262 abuts against the second bearing 25.

In the present embodiment, two transmission structures 20 are fixed in the accommodating cavity of the main body 11 through the fixed connection between the fixing portion 26 and the fixing groove 14, so as to ensure the stability of the gear box structure. Meanwhile, the first end cover 261 and the second end cover 262 in the fixing part 26 are respectively abutted with the first bearing 24 and the second bearing 25, so that the first bearing 24 and the second bearing 25 are limited, the first bearing 24 and the second bearing 25 are prevented from shifting in the movement process of the transmission structure 20, and the reliability of the gearbox is improved.

Specifically, the main body 11, the first support seat 12 and the second support seat 13 are an integral structure, and the box 10 further includes a top cover 15, wherein the top cover 15 is fixedly connected with the main body 11. Set up like this, will set up the transmission structure 20 that holds the intracavity at main part 11 through top cap 15 and keep apart with the external world, guarantee that the gear box is totally closed structure, prevent that external environment from causing the influence to the transmission structure 20 that holds the intracavity, guarantee the reliability of gear box. The main body 11, the first supporting seat 12 and the second supporting seat 13 may be integrally formed by casting, so that the manufacturing cost is low and the structural strength is high.

Optionally, the output end of the output shaft 23 is sealed by an oil seal, and matching surfaces between the interiors of other parts are sealed by a sealant or a sealing ring, so that the protective performance of the gear box is improved, and the gear box can adapt to various severe working conditions.

The utility model discloses a further embodiment provides a travelling car, travelling car include frame, two drive division, four wheels and foretell gear box, and gear box and two drive division all set up on the frame, and two input gear 21 one-to-one of two drive divisions and gear box are connected, and four wheels set up on four output shafts 23 of gear box one-to-one.

In the embodiment, the two driving parts respectively drive the two input gears 21 in the gear box to rotate, so as to drive the four output shafts 23 in the two transmission structures 20 in the gear box to synchronously rotate, thereby driving the trolley to move; the purpose of differential speed of the two transmission structures 20 can be achieved by respectively adjusting the input rotating speeds of the two driving parts, so that the steering of the trolley is realized. By the arrangement, the performance of the trolley is ensured, the overall size of the trolley is reduced, and the trolley is ensured to be suitable for various different environment working conditions.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gearbox, comprising:

a case (10);

the transmission structure (20) comprises an input gear (21), two gear sets (22) and two output shafts (23), the two gear sets (22) are connected with the two output shafts (23) in a one-to-one correspondence manner, and the input gear (21) is in driving connection with the two gear sets (22) so as to drive the two output shafts (23) to synchronously rotate;

the two transmission structures (20) are arranged on the box body (10) side by side, and four output shafts (23) of the two transmission structures (20) are arranged in parallel.

2. A gearbox according to claim 1,

the gear set (22) comprises a rotating shaft (221), a first output gear (222), a second output gear (223) and a third output gear (224), the rotating shaft (221) and the output shaft (23) are arranged in parallel, the first output gear (222) and the second output gear (223) are arranged on the rotating shaft (221), and the third output gear (224) is arranged on the output shaft (23); wherein the input gear (21) and the second output gear (223) are engaged, and the first output gear (222) and the third output gear (224) are engaged.

3. A gearbox according to claim 2,

the pivot (221) with first output gear (222) structure as an organic whole, the number of teeth of input gear (21) with the number of teeth of first output gear (222) all is less than the number of teeth of second output gear (223), the number of teeth of third output gear (224) is greater than the number of teeth of first output gear (222).

4. A gearbox according to claim 1, characterised in that the input gear (21) in the transmission structure (20) is located between two of said gear sets (22), and that the two output shafts (23) of the transmission structure (20) are a first and a second drive shaft, respectively, which are both turning and rotating at the same speed; the axes of the two first driving shafts of the two transmission structures (20) are coincident, and the axes of the two second driving shafts of the two transmission structures (20) are coincident.

5. Gearbox according to claim 1, characterised in that it has a preset plane of symmetry (30), the axis of the output shaft (23) being perpendicular to the plane of symmetry (30), the two transmission structures (20) being arranged symmetrically with respect to the plane of symmetry (30).

6. A gearbox according to claim 2,

box (10) include main part (11), first supporting seat (12) and second supporting seat (13), main part (11) have and hold the chamber, first supporting seat (12) are two, two first supporting seat (12) set up respectively on two lateral walls of main part (11), second supporting seat (13) set up hold the intracavity, second supporting seat (13) are located two between first supporting seat (12), every first supporting seat (12) support one input gear (21), gear train (22) and output shaft (23) of transmission structure (20), second supporting seat (13) support two gear train (22) and output shaft (23) of transmission structure (20).

7. A gearbox according to claim 6,

the first supporting seat (12) is provided with a first supporting hole (121) and a second supporting hole (122), the transmission structure (20) further comprises a first bearing (24) and a second bearing (25), wherein the first bearing (24) is arranged in the first supporting hole (121), the second bearing (25) is arranged in the second bearing (25) hole, one end of the output shaft (23) penetrates through the first bearing (24), and one end of the rotating shaft (221) penetrates through the second bearing (25).

8. A gearbox according to claim 7,

the second supporting seat (13) is provided with two third supporting holes (131) and two fourth supporting holes (132), the gear box further comprises four third bearings (41) and four fourth bearings (42), two third bearings (41) are arranged in each third supporting hole (131), two fourth bearings (42) are arranged in each fourth supporting hole (132), and four rotating shafts (221) of the two transmission structures (20) penetrate into the four third bearings (41) in a one-to-one correspondence mode.

9. A gearbox according to claim 7,

drive structure (20) has fixed part (26), be provided with fixed slot (14) on the lateral wall of main part (11), fixed part (26) set up in fixed slot (14), fixed part (26) include first end cover (261) and second end cover (262), first end cover (261) with first bearing (24) butt, second end cover (262) with second bearing (25) butt.

10. The gearbox according to claim 6, characterized in that the main body (11), the first support seat (12) and the second support seat (13) are an integral structure, the box body (10) further comprises a top cover (15), and the top cover (15) is fixedly connected with the main body (11).

11. Travelling trolley, characterised in that it comprises a frame, two drive parts, four wheels and a gearbox according to any of claims 1 to 10, said gearbox and two said drive parts being arranged on said frame, two said drive parts being connected in one-to-one correspondence with two input gears (21) of said gearbox, and four wheels being arranged in one-to-one correspondence with four output shafts (23) of said gearbox.