CN215567671U

CN215567671U - Miniature heavy-load high-speed transmission case

Info

Publication number: CN215567671U
Application number: CN202121908160.8U
Authority: CN
Inventors: 朱建强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-18
Anticipated expiration: 2031-08-16

Abstract

The utility model is suitable for the technical field of transmission cases, and provides a miniature heavy-load high-speed transmission case which comprises a driving shaft and a transmission shaft, wherein the driving shaft and the transmission shaft are rotatably connected with a case body; the driving shaft is connected with a driving gear; one end of the transmission shaft is slidably sleeved with a sliding gear and a transmission gear meshed with the driving gear; the inner periphery of the sliding gear is clamped with the circumferential direction of the transmission shaft, and the outer periphery of the sliding gear is clamped with the circumferential direction of the transmission gear; the middle part of the sliding gear is provided with a shifting groove, and a shifting fork in the box body is movably abutted and arranged in the shifting groove. Therefore, the utility model can rotate at high speed and carry heavy load, and can stop rotating intermittently according to the working requirement, thereby avoiding heating caused by long-time working, prolonging the service life and avoiding the safety accident problem caused by the transmission case driving the work piece to work all the time.

Description

Miniature heavy-load high-speed transmission case

Technical Field

The utility model relates to the technical field of transmission cases, in particular to a miniature heavy-load high-speed transmission case.

Background

In the agricultural production process of China, weeds can grow while crops are planted, and in order to improve the growth performance of the crops, straw is returned to the field and soil is fertilized, farmers generally need to mow the weeds regularly; in addition, for example, lawn in a stadium, a hotel, a golf course, etc., regular trimming of the lawn is also required.

At the present stage, a mower is generally directly used for mechanical operation for weed cutting or lawn trimming, so that the labor is saved; however, the transmission case of the mower on the market at present cannot rotate at a high speed, and gears in the transmission case have serious friction, cannot rotate at a high speed and cannot carry out heavy load; meanwhile, no matter whether the mowing work is suspended or not, if the main driving device is not closed, the transmission box always works, so that the transmission box generates heat seriously, and the service life is short.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks, an object of the present invention is to provide a miniature heavy-duty high-speed transmission case, which can rotate at high speed and carry heavy load, and can intermittently stop rotating according to the working requirement, thereby avoiding heat generation due to long-time work, prolonging the service life, and avoiding safety accidents caused by the transmission case driving the work piece all the time.

In order to achieve the purpose, the utility model provides a miniature heavy-load high-speed transmission case which comprises a driving shaft and a transmission shaft, wherein the driving shaft is rotatably connected with a case body of the transmission case; and one end of the driving shaft, which is positioned in the box body, is fixedly connected with the driving gear.

One end of the transmission shaft, which is positioned in the box body, is slidably sleeved with a transmission gear meshed with the driving gear, and the transmission shaft and the transmission gear rotate independently; the part of the transmission shaft, which is positioned between the transmission gear and the inner wall of the box body, is slidably sleeved with a sliding gear, the inner periphery of the sliding gear is clamped with the circumferential direction of the transmission shaft, and the outer periphery of the sliding gear is clamped with the circumferential direction of the transmission gear; the middle part of the sliding gear is provided with a shifting groove, and a shifting fork in the box body is movably abutted and arranged in the shifting groove.

According to the miniature heavy-load high-speed transmission case, the position, close to the outer surface of the case body, of the driving shaft is provided with the positioning clamping groove, and the clamping spring is clamped in the positioning clamping groove.

According to the miniature heavy-load high-speed transmission case, the part of the driving shaft, which is positioned outside the case body, is also rotatably sleeved with the stable shell.

According to the miniature heavy-load high-speed transmission case, the outer part of the driving shaft is sleeved with the second bearing, and the stabilizing shell is rotatably sleeved through the second bearing; and a sealing ring is arranged outside the second bearing.

According to the miniature heavy-load high-speed transmission case, the peripheral of the sliding gear is clamped with the transmission gear in the circumferential direction in the following mode: the periphery of the sliding gear is provided with an outer clamping protrusion, and the non-meshing end of the transmission gear is provided with an inner clamping groove matched with the outer clamping protrusion for use.

According to the miniature heavy-load high-speed transmission case, the outer clamping protrusions are external splines, and the inner clamping grooves are internal splines.

The utility model aims to provide a miniature heavy-load high-speed transmission case, wherein a driving shaft and a driving gear are fixedly connected, and the positions of the driving shaft and the driving gear are limited by a positioning clamping groove and a clamping spring, so that the driving shaft can be prevented from ejecting a transmission gear, and the driving gear and the transmission gear are prevented from being damaged by friction; through setting up the gear that slides, can make the work piece not need the during operation, transmission case stall. In conclusion, the beneficial effects of the utility model are as follows: the transmission case can carry out high-speed rotation and heavy load, and can avoid long-time work and generate heat according to work needs intermittent type stall, improves life, avoids the transmission case to drive work piece work always and the incident problem that brings.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a schematic perspective view of the present invention in another aspect;

in the figure: 1-a driving shaft, 11-a driving gear, 12-a positioning clamping groove, 13-a first bearing, 14-a stabilizing shell and 141-a second bearing; 15-a drive pulley; 2-transmission shaft, 21-transmission gear, 211-inner clamping groove; 22-sliding gear, 221-shifting groove and 222-outer clamping protrusion; 23-a third bearing; 3-box body, 4-sealing ring.

Detailed Description

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

Referring to fig. 1, the utility model provides a miniature heavy-duty high-speed transmission case, which comprises a driving structure and a transmission structure arranged on a case body 3 of the transmission case.

Referring to fig. 3, the driving structure includes a driving shaft 1 rotatably connected to the box 3 through a first bearing 13, the driving shaft 1 is fixedly connected to a driving gear 11 at one end inside the box 3, referring to fig. 2, a positioning clamping groove 12 is arranged at a position where the driving shaft 1 is close to the outer surface of the box 3, a clamping spring is clamped in the positioning clamping groove 12, and the clamping spring can limit the position of the driving shaft 1, so that the driving shaft 1 cannot be pulled back and forth in the first bearing 13 or the box 3. One end of the driving shaft 1 positioned outside the box body 3 is sleeved with a driving belt wheel 15 for driving the driving shaft 1 and the driving gear 11 to rotate.

Referring to fig. 2, the transmission structure includes a transmission shaft 2 rotatably connected to the box 3 through a third bearing 23, one end of the transmission shaft 2 located inside the box 3 is slidably sleeved with a transmission gear 21, the transmission shaft 2 and the transmission gear 21 rotate independently, and the transmission gear 21 is engaged with the driving gear 11; the part of the transmission shaft 2, which is positioned between the transmission gear 21 and the inner wall of the box body 3, is slidably sleeved with a sliding gear 22, and the inner periphery of the sliding gear 22 is clamped with the circumferential direction of the transmission shaft 2, so that the sliding gear 22 and the transmission shaft 2 can rotate simultaneously; the periphery of the sliding gear 22 is clamped with the transmission gear 21 in the circumferential direction; the middle part of the sliding gear 22 is provided with a shifting groove 221, a shifting fork arranged in the box body 3 is movably abutted in the shifting groove 221, and the shifting fork is the prior art, so a person skilled in the art can arrange the shifting fork at a proper position of the box body 3; one end of the transmission shaft 2, which is positioned outside the box body 3, is connected with a workpiece, and the workpiece is a cutting knife for mowing.

The inner circumference of the sliding gear 22 can be clamped with the transmission shaft 2 in the circumferential direction in the following manner: and matching the internal spline and the external spline. The peripheral of the sliding gear 22 and the transmission gear 21 can be clamped in the circumferential direction in the following manner: an outer clamping protrusion 222 is arranged on the periphery of the sliding gear 22, and an inner clamping groove 211 matched with the outer clamping protrusion 222 for use is arranged at the non-meshing end of the transmission gear 21; in the present invention, the outer locking projection 222 is an external spline, and the inner locking groove 211 is an internal spline.

In the prior art, the driving shaft 1 and the driving gear 11 are connected in a spline socket manner without a positioning clamping groove 12, so that the driving shaft 1 can be drawn back and forth in the driving gear 11; when the driving pulley 15 drives the driving shaft 1 and the driving gear 11 to rotate, the driving shaft 1 is inevitably rotated away from the axis line, when the driving shaft 1 is rotated away from the axis line, the driving shaft 1 pushes the driving gear 11, so that the driving gear 11 pushes the transmission gear 21, the friction force between the driving gear 11 and the transmission gear 21 is increased, and the driving gear 11 and the transmission gear 21 are easily damaged; meanwhile, the transmission case of the prior art cannot perform high-speed rotation and heavy load due to the off-axis rotation of the driving shaft 1 and the jacking between the driving gear 11 and the transmission gear 21.

According to the utility model, the driving shaft 1 is fixedly connected with the driving gear 11, and the positions of the driving shaft 1 and the driving gear 11 are limited by the positioning clamping groove 12 and the clamping spring, so that even if the driving shaft 1 rotates away from the axis line, the driving gear 11 cannot push the transmission gear 21, the friction damage of the driving gear 11 and the transmission gear 21 is avoided, the service life is prolonged, and meanwhile, high-speed rotation and heavy load can be carried out.

Preferably, in order to better ensure that the driving shaft 1 can rotate along the axial lead thereof, the part of the driving shaft 1 located outside the box body 3 is further sleeved with the stabilizing shell 14 through the second bearing 141, and the stabilizing shell 14 can be connected to the box body 3; through the effect of the two bearings of the first bearing 13 and the second bearing 141, the driving shaft 1 can rotate more stably, and the driving gear 11 and the transmission gear 21 are prevented from being damaged due to inclination when the driving shaft 1 rotates.

Preferably, the sealing ring 4 is arranged outside the second bearing 141 on the stabilizing shell 14, and since the transmission case of the present invention is mainly used for mowing equipment, grass can be prevented from entering the inside of the second bearing 141 through the sealing ring 4 to affect the operation of the bearing. Of course, the seal ring 4 may be provided in both the first bearing 13 and the third bearing 23.

When the driving gear 11 in the driving structure rotates, the transmission gear 21 is driven to rotate. When the work piece needs the rotation work, the shift fork butt is dialled groove 221, dials in drive gear 21 with sliding gear 22, and at this moment, outer card is protruding 222 and interior draw-in groove 211 and is mutually supported, because sliding

gear

22 and 2 circumferencial direction joint of transmission shaft, sliding gear 22 can drive

gear

21 and 2 coaxial rotations of transmission shaft, and drive gear 21 rotates under the drive power of drive gear 11, then transmission shaft 2 rotates, and at this moment, the work piece rotation work. When the work piece needs to stop working, the shifting fork is abutted to the shifting groove 221, the sliding gear 22 is shifted out of the transmission gear 21, at the moment, the outer clamping protrusion 222 and the inner clamping groove 211 are separated, and because the transmission shaft 2 and the transmission gear 21 rotate independently, when the transmission gear 21 is driven to rotate by the driving gear 11, the transmission gear 21 idles, the transmission shaft 2 does not rotate, and the work piece does not work.

According to the utility model, the sliding gear 22 is arranged, so that the transmission box can stop rotating when the workpiece does not need to work, the transmission box is prevented from heating due to long-time work, the service life is shortened, and meanwhile, the problem of safety accidents caused by the fact that the transmission box drives the workpiece to work all the time can be avoided.

In conclusion, the driving shaft and the driving gear are fixedly connected, and the positions of the driving shaft and the driving gear are limited by the positioning clamping groove and the clamping spring, so that the driving shaft can be prevented from ejecting the transmission gear, and the driving gear and the transmission gear are prevented from being damaged by friction; through setting up the gear that slides, can make the work piece not need the during operation, transmission case stall. In conclusion, the beneficial effects of the utility model are as follows: the transmission case can carry out high-speed rotation and heavy load, and can avoid long-time work and generate heat according to work needs intermittent type stall, improves life, avoids the transmission case to drive work piece work always and the incident problem that brings.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A miniature heavy-load high-speed transmission case is characterized by comprising a driving shaft and a transmission shaft which are rotatably connected with a case body of the transmission case;

one end of the driving shaft, which is positioned in the box body, is fixedly connected with a driving gear;

2. The miniature heavy-duty high-speed transmission case according to claim 1, wherein a positioning slot is provided at a position of the driving shaft adjacent to the outer surface of the case body, and the positioning slot is engaged with the snap spring.

3. The miniature heavy-duty high-speed transmission case according to claim 1, wherein the portion of said drive shaft located outside said case is further rotatably journaled in a stabilizer housing.

4. The miniature heavy-duty high-speed transmission case according to claim 3, wherein a second bearing is sleeved on an outer portion of said drive shaft, and said stabilizing shell is rotatably sleeved by said second bearing; and a sealing ring is arranged outside the second bearing.

5. The miniature heavy-duty high-speed transmission case according to claim 1, wherein the peripheral of the sliding gear is clamped with the circumferential direction of the transmission gear in a manner that: the periphery of the sliding gear is provided with an outer clamping protrusion, and the non-meshing end of the transmission gear is provided with an inner clamping groove matched with the outer clamping protrusion for use.

6. The miniature heavy-duty high-speed transmission case according to claim 5, wherein said external locking protrusion is an external spline and said internal locking groove is an internal spline.