CN212429691U

CN212429691U - Gear box

Info

Publication number: CN212429691U
Application number: CN202021781036.5U
Authority: CN
Inventors: 张田; 柳志强; 何健; 韦冬生
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-01-29
Anticipated expiration: 2030-08-24

Abstract

The utility model relates to a transmission technical field discloses a gear box, include: a box body; the input shaft system comprises a first gear shaft and a second gear shaft which are rotationally connected to the box body, the first gear shaft and the second gear shaft are arranged in parallel, and the planes of the central axes of the first gear shaft and the second gear shaft are distributed along a diagonal plane of the box body; the output shaft system comprises an output shaft rotationally connected to the box body and a meshing gear connected to the output shaft, and the output shaft is parallel to the first gear shaft; the middle shaft system comprises a first shaft system and a second shaft system which are rotationally connected to the box body, the first shaft system is in transmission connection between the first gear shaft and the meshing gear, the second shaft system is in transmission connection between the second gear shaft and the meshing gear, and the meshing position of the first shaft system and the meshing gear and the meshing position of the second shaft system and the meshing gear are symmetrically arranged relative to the output shaft. The gear box is high in bearing capacity, compact in structure and small in size.

Description

Gear box

Technical Field

The utility model relates to a transmission technical field especially relates to a gear box.

Background

The drilling machine is used as a drilling device with strong practicability and is widely applied in the engineering field, particularly the mining field. The gear box of the drilling machine can provide power for a drill bit of the drilling machine and is a core component in the drilling machine. Because the work of the drilling machine has the characteristics of poor working condition, large impact and the like, the gear box of the drilling machine is greatly influenced by external force, the design and manufacture difficulty is high, and faults are easily caused.

The existing drilling machine gear box has messy models and numerous structures, and has the main defects that: the radial stress of the gear box is unbalanced, and the bearing capacity is poor; the occupied space of the shaft system in the gear box is large, so that the whole size of the gear box is large and the weight is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear box, this gear box not only bearing capacity is strong, compact structure moreover, and the volume is less.

To achieve the purpose, the utility model adopts the following technical proposal:

a gearbox, comprising: a box body; the input shaft system comprises a first gear shaft and a second gear shaft which are rotationally connected to the box body, the first gear shaft and the second gear shaft are arranged in parallel, and planes where central axes of the first gear shaft and the second gear shaft are located are distributed along a diagonal plane of the box body; the output shaft system comprises an output shaft rotationally connected to the box body and a meshing gear connected to the output shaft, and the output shaft and the first gear shaft are arranged in parallel; the middle shaft system comprises a first shaft system and a second shaft system which are rotationally connected to the box body, the first shaft system is in transmission connection between the first gear shaft and the meshing gear, the second shaft system is in transmission connection between the second gear shaft and the meshing gear, and the meshing position of the first shaft system and the meshing gear and the meshing position of the second shaft system and the meshing gear are symmetrically arranged around the output shaft.

As a preferable scheme of the gearbox, the first shaft system comprises a third gear shaft and a first transmission gear, the first transmission gear is connected to the third gear shaft, the first transmission gear is meshed with the first gear shaft, and the third gear shaft is meshed with the meshing gear; the second shaft system comprises a fourth gear shaft and a second transmission gear, the second transmission gear is connected to the fourth gear shaft, the second transmission gear is meshed with the second gear shaft, and the fourth gear shaft is meshed with the meshing gear.

As a preferred scheme of the gearbox, the output shaft system further comprises an expansion sleeve, the expansion sleeve is locked and sleeved on the output shaft, and the meshing gear is sleeved and connected on the expansion sleeve.

As a preferred scheme of the gearbox, the output shaft system further comprises a connecting key, and the expansion sleeve is connected to the output shaft through the connecting key.

As a preferable scheme of the gearbox, both ends of the output shaft are rotatably connected to the box body through bearings; both ends of the first gear shaft and the second gear shaft are rotatably connected to the box body through bearings; and the two ends of the third gear shaft and the fourth gear shaft are rotatably connected to the box body through bearings.

As a preferable aspect of the gear box, a distance between the output shaft and the first gear shaft central axis is set to be equal to a distance between the output shaft and the second gear shaft central axis.

As a preferable scheme of the gearbox, the input end covers of the first gear shaft and the second gear shaft are provided with dustproof assemblies, and the dustproof assemblies are connected to the box body.

As a preferred scheme of the gearbox, the gearbox further comprises a transparent cover assembly and a connector, wherein the connector is connected to the transparent cover assembly, the transparent cover assembly is connected to the box body, one end of the output shaft extends into the transparent cover assembly, a center hole of the output shaft is communicated with the connector, and the connector is used for being connected with an external air pipe.

As a preferable scheme of the gearbox, one end of the output shaft, which is far away from the joint, is connected with a shaft sleeve, and the shaft sleeve is used for being connected with an external connecting rod.

As a preferred scheme of the gearbox, a sealing ring and a first oil seal are arranged on the output shaft, and the sealing ring and the first oil seal are clamped between the output shaft and the transparent cover assembly in a sealing mode.

The utility model has the advantages that:

the embodiment provides a gear box which comprises a box body, an input shaft system, an output shaft system and a middle shaft system, wherein a first gear shaft and a second gear shaft of the input shaft system are arranged in parallel, and planes of central axes of the first gear shaft and the second gear shaft are distributed along a diagonal plane of the box body, so that the first gear shaft and the second gear shaft can fully utilize the space inside the box body, the structure in the gear box is compact, and the size and the weight of the gear box are reduced; the middle shaft system is in transmission connection with the first gear shaft and the meshing gear on the output shaft through the first shaft system, and the second gear shaft is in transmission connection with the meshing gear on the output shaft through the second shaft system, so that the output shaft adopts a double-input power input form, the power input capacity of the input shaft is increased, and meanwhile, the meshing position of the first shaft system and the meshing gear and the meshing position of the second shaft system and the meshing gear are symmetrically arranged relative to the output shaft, so that radial forces borne by the meshing gear and the output shaft can be mutually offset, and the bearing capacity of the gear box is greatly increased.

Drawings

FIG. 1 is a top view of a gearbox according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

fig. 3 is a schematic view of a gearbox according to an embodiment of the present invention mounted on a frame.

In the figure:

1. a box body; 11. a main box body; 12. a box cover; 21. a first gear shaft; 22. a second gear shaft; 3. outputting a shafting; 31. an output shaft; 311. a seal ring; 312. a first oil seal; 32. a meshing gear; 33. expanding and tightening the sleeve; 34. a connecting bond; 41. a first shafting; 411. a third gear shaft; 412. a first drive gear; 42. a second shaft system; 421. a fourth gear shaft; 422. a second transmission gear; 5. a dust-proof assembly; 51. a first transparent cover; 52. pressing a plate; 6. a transparent cover assembly; 61. a second transparent cover; 62. a third transparent cover; 63. a fourth transparent cover; 64. a fifth transparent cover; 7. a joint; 8. a shaft sleeve; 81. a second oil seal; 9. connecting rods are externally connected; 10. and a frame.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the gear box provided by the present invention is further explained by the following embodiments with reference to the attached drawings.

The embodiment provides a gearbox, as shown in fig. 1-2, the gearbox includes a box 1, an input shaft system, an output shaft system 3 and a middle shaft system, as shown in fig. 3, the box 1 is set as a cuboid and is installed on a rack 10, the box 1 includes a main box 111 and a box cover 12 covering the main box 111, the input shaft system, the output shaft system 3 and the middle shaft system are all installed in the box 1, the middle shaft system is connected between the output shaft system 3 and the input shaft system in a transmission manner, the input shaft system is used for inputting power to the gearbox, and the output shaft system 3 is used for outputting power in the gearbox outwards.

As shown in fig. 1, in the present embodiment, the input shaft system includes a first gear shaft 21 and a second gear shaft 22 rotatably connected to the box body 1, the first gear shaft 21 and the second gear shaft 22 are arranged in parallel, and a plane where a central axis of the first gear shaft 21 and a central axis of the second gear shaft 22 are located is distributed along a diagonal plane of the box body 1, so that the first gear shaft 21 and the second gear shaft 22 can make full use of a space inside the box body 1, which is beneficial to promoting to make an internal structure of the gearbox more compact, and reducing a size of the gearbox, thereby being beneficial to reducing a volume and a weight of the gearbox. It will be appreciated that the first gear shaft 21 and the second gear shaft 22 are each an integral part of a shaft and a gear for meshing with other components, the shaft being supported for rotation.

It is worth to say that, the shafting in this gear box has adopted non-horizontal arrangement, and non-horizontal arrangement can reduce this gear box's whole size greatly, compresses its installation space who occupies, compares the gear box among the prior art, and this gear box radial dimension has reduced 30%, and under the unchangeable condition of axial dimension, the weight has reduced 30%, is favorable to the lightweight design of this gear box.

As shown in fig. 2, the output shaft system 3 includes an output shaft 31 rotatably coupled to the casing 1 and a meshing gear 32 coupled to the output shaft 31, the output shaft 31 being disposed in parallel with the first gear shaft 21 and coplanar with the first gear shaft 21 and the second gear shaft 22 for outputting power outward. Specifically, the distance between the central axis of the output shaft 31 and the central axis of the first gear shaft 21 is set to be equal to the distance between the central axis of the output shaft 31 and the central axis of the second gear shaft 22, so that the components inside the gear box can be symmetrically distributed with the output shaft 31 as the center, facilitating the arrangement of the internal structure of the gear box.

Preferably, the output shaft system 3 further comprises an expansion sleeve 33, an inner peripheral locking sleeve of the expansion sleeve 33 is arranged on the output shaft 31, and the meshing gear 32 is sleeved on and connected to an outer peripheral surface of the expansion sleeve 33, so that the meshing gear 32 can better cope with continuous impact applied to the output shaft 31. More preferably, the output shaft system 3 further comprises a connecting key 34, the output shaft 31 is provided with a key slot, the connecting key 34 is arranged in the key slot, and the expansion sleeve 33 is connected to the output shaft 31 through the connecting key 34, so that the stability of power transmission between the expansion sleeve 33 and the output shaft 31 is improved. Specifically, the expansion sleeve 33 is connected to the meshing gear 32 by a bolt and a wire, and then connected and locked to the output shaft 31 by a connecting key 34. It is to be understood that, in the present embodiment, the specific form of the connection key 34 is not particularly limited, and may be a flat key, a spline, or the like.

Preferably, both ends of the output shaft 31 are rotatably connected to the housing 1 through bearings, so that the output shaft 31 rotates smoothly and receives less frictional resistance. Specifically, different bearings are chooseed for use at the both ends of output shaft 31, the utilization ratio of improvement bearing that can furthest, and the bearing of output shaft 31 both ends configuration is tapered roller bearing simultaneously, no longer chooses for use different bearings respectively for the axial force and the radial force that reply the bearing received, can reduce the bearing configuration by a wide margin for this gear box compares in the whole platform cost reduction 30% of traditional gear box, still makes this gear box dismantle simple and fast to the bearing when the maintenance simultaneously.

The middle shaft system comprises a first shaft system 41 and a second shaft system 42 which are rotationally connected to the box body 1, the first shaft system 41 is in transmission connection between the gear of the first gear shaft 21 and the meshing gear 32, the second shaft system 42 is in transmission connection between the gear of the second gear shaft 22 and the meshing gear 32, the meshing position of the first shaft system 41 and the meshing gear 32 and the meshing position of the second shaft system 42 and the meshing gear 32 are symmetrically arranged around the output shaft, so that the meshing gear 32 is clamped between the first shaft system 41 and the second shaft system 42, radial forces applied to the meshing gear 32 and the output shaft 31 can be mutually offset, and the bearing capacity of the gearbox can be greatly increased.

In this embodiment, both ends of the first gear shaft 21 and the second gear shaft 22 are rotatably connected to the case 1 through bearings, so that the first gear shaft 21 and the second gear shaft 22 can smoothly rotate, the received frictional resistance is small, the cantilever state of the first gear shaft 21 and the second gear shaft 22 is avoided, and the service life of the first gear shaft 21 and the service life of the second gear shaft 22 are prolonged. Preferably, the input ends of the first gear shaft 21 and the second gear shaft 22 extend out of the case 1 for connection with the output end of a power source (which may be a motor, a pump, etc.). Specifically, the power source is directly mounted on the case 1, so that the positioning between the output shaft 31 of the power source and the first gear shaft 21 or the second gear shaft 22 is stable, and the problems of gear damage, excessive instantaneous shearing force, damage to a connecting bolt and the like on the first gear shaft 21 or the second gear shaft 22 can be avoided.

Specifically, the first shaft system 41 includes a third gear shaft 411 and a first transmission gear 412, the second shaft system 42 includes a fourth gear shaft 421 and a second transmission gear 422, the third gear shaft 411 and the fourth gear shaft 421 are both parallel to the output shaft 31, the first transmission gear 412 is sleeved on the third gear shaft 411 and connected with the third gear shaft 411 through a connecting key 34, the second transmission gear 422 is sleeved on the fourth gear shaft 421 and connected with the fourth gear shaft 421 through the connecting key 34, the first transmission gear 412 is engaged with the gear of the first gear shaft 21, and the second transmission gear 422 is engaged with the gear of the second gear shaft 22. It will be appreciated that the third gear shaft 411 and the fourth gear shaft 421 are each an integral part of a shaft and gear for engagement with other components, the shaft being supported for rotation.

Preferably, both ends of the third gear shaft 411 and the fourth gear shaft 421 are rotatably connected to the case 1 through bearings, so that the third gear shaft 411 and the fourth gear shaft 421 rotate smoothly and the received resistance is small.

In this embodiment, the gear of the third gear shaft 411 is meshed with the meshing gear 32, the gear of the fourth gear shaft 421 is meshed with the meshing gear 32, and two meshing positions of the meshing gear 32 are oppositely arranged, so that not only the internal structure of the gear box is symmetrically distributed, but also the radial forces applied to the meshing gear 32 and the output shaft 31 can be mutually offset, and the bearing capacity of the gear box can be increased.

Preferably, the input end covers of the first gear shaft 21 and the second gear shaft 22 are provided with the dustproof assembly 5, and the dustproof assembly 5 is connected to the box body 1 for preventing dust when the gear box is stored, and it can be understood that the dustproof assembly 5 needs to be opened when the gear box is used. Specifically, the dust-proof assembly 5 includes a first transparent cover 51 and a pressing plate 52, the first transparent cover 51 is connected to the box body 1 through bolts, and the pressing plate 52 is connected to the first transparent cover 51 through bolts.

In this embodiment, this gear box still includes to pass through and covers subassembly 6 and joint 7, connects 7 to be connected on passing through covering subassembly 6, passes through to cover subassembly 6 to be connected on box 1, and the one end of output shaft 31 stretches into to pass through to cover subassembly 6 and the centre bore of output shaft 31 communicates with joint 7, connects 7 to be used for being connected with external tuber pipe or external water piping, and the external tuber pipe of being convenient for lets in the centre bore of output shaft 31 with the air or the external water piping lets in the centre bore of output shaft 31 with water. Specifically, the transparent cover assembly 6 includes a second transparent cover 61, a third transparent cover 62 and a fourth transparent cover 63, the second transparent cover 61 and the third transparent cover 62 are connected to the box 1 after being penetrated through by bolts, one end of the output shaft 31 penetrates the second transparent cover 61, the third transparent cover 62 and the fourth transparent cover 63 in sequence, and the joint 7 is connected to the fourth transparent cover 63 through threads. The transparent cover assembly 6 further comprises a fifth transparent cover 64, the fifth transparent cover 64 is connected to the box body 1 through bolts, and the output end of the output shaft 31 penetrates through the fifth transparent cover 64. Preferably, a shaft sleeve 8 is connected to one end of the output shaft 31 far away from the joint 7, a fifth transparent cover 64 partially extends out of the shaft sleeve 8, the shaft sleeve 8 is used for being connected with the external connecting rod 9, and the shaft sleeve 8 can play a role in positioning the external connecting rod 9.

Preferably, one end of the output shaft 31 close to the joint 7 is sleeved with a sealing ring 311 and a first oil seal 312, and the sealing ring 311 and the first oil seal 312 are hermetically clamped between the output shaft 31 and the transparent cover assembly 6, so that oil leakage, water leakage or air leakage can be prevented. More preferably, the shaft sleeve 8 is further sleeved with a second oil seal 81, and the second oil seal 81 is hermetically clamped between the shaft sleeve 8 and the fifth transparent cover 64, so that oil leakage can be prevented.

It is worth mentioning that the gearbox can be used as a drill gearbox, i.e. the output end of the gearbox is connected to the drill pipe coupling, but also as a gearbox for other machines. When the drill rod of the drilling machine continuously impacts the rock wall, the output shaft 31 can bear discontinuous and long-term impact force, and the vibration of the output shaft 31 can cause the service lives of the bearing and the oil seal to be greatly shortened, so that the problems of oil leakage of the oil seal, bearing abrasion and the like are caused. This gear box need design installation loading frock at the beginning of the design, then restores the scene through the laboratory bench, carries out long-time trial run experiment, through increasing bearing pretightning force, adjustment bearing play to reach an optimal play state, make the bearing can enough play radial effect, be unlikely to again the locking, can prolong the life-span of this gear box by a wide margin.

The gearbox is driven by adopting a parallel-level involute gear, the design method and the processing technology are mature, the processing precision and the assembly means of the gearbox are precise, the mechanical efficiency of the gearbox is superior to that of other products in the same industry, the heat dissipation capacity of the gearbox is greatly reduced, the safety of a sealing element is improved, the connection mode of the gearbox is simple and easy to disassemble and assemble, and the disassembly and the unpacking maintenance under the severe environments of mines and the like are facilitated.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A gearbox, comprising:

a box body (1);

the input shaft system comprises a first gear shaft (21) and a second gear shaft (22) which are rotationally connected to the box body (1), the first gear shaft (21) and the second gear shaft (22) are arranged in parallel, and the planes of the central axes of the first gear shaft (21) and the second gear shaft (22) are distributed along a diagonal plane of the box body (1);

the output shaft system (3) comprises an output shaft (31) rotationally connected to the box body (1) and a meshing gear (32) connected to the output shaft (31), and the output shaft (31) and the first gear shaft (21) are arranged in parallel;

the middle shaft system comprises a first shaft system (41) and a second shaft system (42) which are rotationally connected to the box body (1), the first shaft system (41) is in transmission connection between the first gear shaft (21) and the meshing gear (32), the second shaft system (42) is in transmission connection between the second gear shaft (22) and the meshing gear (32), and the meshing position of the first shaft system (41) and the meshing gear (32) and the meshing position of the second shaft system (42) and the meshing gear (32) are symmetrically arranged around the output shaft (31).

2. A gearbox according to claim 1, in which the first shafting (41) comprises a third gear shaft (411) and a first transmission gear (412), the first transmission gear (412) being connected to the third gear shaft (411), the first transmission gear (412) being in mesh with the first gear shaft (21), the third gear shaft (411) being in mesh with the meshing gear (32);

the second shaft system (42) comprises a fourth gear shaft (421) and a second transmission gear (422), the second transmission gear (422) is connected to the fourth gear shaft (421), the second transmission gear (422) is meshed with the second gear shaft (22), and the fourth gear shaft (421) is meshed with the meshed gear (32).

3. The gearbox according to claim 1, characterized in that the output shaft system (3) further comprises an expansion sleeve (33), the expansion sleeve (33) is locked and sleeved on the output shaft (31), and the meshing gear (32) is sleeved and connected on the expansion sleeve (33).

4. Gearbox according to claim 3, characterised in that the output shaft system (3) further comprises a connection key (34), the expansion sleeve (33) being connected to the output shaft (31) by means of the connection key (34).

5. Gearbox according to claim 2, in which the output shaft (31) is rotatably connected at both ends to the casing (1) by means of bearings; both ends of the first gear shaft (21) and the second gear shaft (22) are rotatably connected to the box body (1) through bearings; and the two ends of the third gear shaft (411) and the fourth gear shaft (421) are rotatably connected to the box body (1) through bearings.

6. A gearbox according to claim 1, characterised in that the distance between the output shaft (31) and the centre axis of the first gear shaft (21) is arranged to be equal to the distance between the output shaft (31) and the centre axis of the second gear shaft (22).

7. Gearbox according to claim 1, characterised in that the input end covers of the first gear shaft (21) and the second gear shaft (22) are provided with a dust-proof assembly (5), which dust-proof assembly (5) is connected to the casing (1).

8. The gearbox according to claim 1, further comprising a transparent cover assembly (6) and a joint (7), wherein the joint (7) is connected to the transparent cover assembly (6), the transparent cover assembly (6) is connected to the box body (1), one end of the output shaft (31) extends into the transparent cover assembly (6), a central hole of the output shaft (31) is communicated with the joint (7), and the joint (7) is used for being connected with an external air pipe.

9. A gearbox according to claim 8 in which the end of the output shaft (31) remote from the joint (7) is connected to a sleeve (8), the sleeve (8) being adapted to be connected to an external connecting rod (9).

10. The gearbox according to claim 9, characterized in that a sealing ring (311) and a first oil seal (312) are arranged on the output shaft (31), and the sealing ring (311) and the first oil seal (312) are clamped between the output shaft (31) and the transparent cover assembly (6) in a sealing manner.