CN212928674U

CN212928674U - Power takeoff with adjustable transmission ratio

Info

Publication number: CN212928674U
Application number: CN202021493809.XU
Authority: CN
Inventors: 陈万; 欧清源; 汪洋; 陈立坚
Original assignee: Chongqing Ezf Transmission Equipment Co ltd
Current assignee: Chongqing Ezf Transmission Equipment Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-09
Anticipated expiration: 2030-07-23

Abstract

The utility model discloses a power takeoff of drive ratio with adjustable, including adjustment mechanism and drive mechanism, adjustment mechanism includes the cylinder block, and the cover is equipped with the shift fork on the inside piston rod of cylinder block, and the inboard that the cylinder block corresponds the shift fork is equipped with the stroke chamber, and the cover is equipped with the spring on the piston rod between shift fork lateral wall and the stroke intracavity wall that corresponds, and the one end of piston rod is connected with the signal switch transmission that stretches into the cylinder block inside, and the other end of piston rod corresponds with the end cap of cylinder block tip, and the spring is located the shift fork and keeps away from one side of end cap. The utility model discloses, realize the removal of shift fork through the cylinder block, the rethread shift fork drives the meshing cover and realizes the adjustment of drive ratio with the output gear meshing that corresponds, and the shift fork cover is established on the piston rod to one side and the cover of shift fork establish the spring fit on the piston rod, make the shift fork fixed, wherein the piston rod is preferred to be step structure, and step face on the piston rod just keeps away from one side cooperation of spring with the shift fork.

Description

Power takeoff with adjustable transmission ratio

Technical Field

The utility model relates to the technical field of cables, concretely relates to transmission ratio's power takeoff with adjustable.

Background

With the vigorous popularization of new energy automobiles, the share of the new energy automobiles in the market is increased year by year, and with the increase of environmental awareness of people, the environmental protection performance of automobile parts is higher and higher, especially for cables therein.

Because the electronic components on the electric vehicle are extremely numerous, the electromagnetic environment on the whole electric vehicle is complex during working, and the working performance of the common cable in the complex electromagnetic environment can not meet the requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transmission ratio's power takeoff with adjustable to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an adjustable ratio power takeoff comprising an adjustment mechanism and a transmission mechanism:

the adjusting mechanism comprises an air cylinder body, a shifting fork is sleeved on a piston rod in the air cylinder body, a stroke cavity is arranged on the inner side of the air cylinder body corresponding to the shifting fork, a spring is sleeved on the piston rod between the side wall of the shifting fork and the inner wall of the corresponding stroke cavity, one end of the piston rod is in transmission connection with a signal switch extending into the air cylinder body, the other end of the piston rod corresponds to a plug at the end part of the air cylinder body, and the spring is positioned on one side, far away from the plug, of the shifting;

the transmission mechanism comprises an output shaft, a meshing sleeve and a plurality of output gears are sleeved on the output shaft, and the shifting fork is matched with the meshing sleeve.

Furthermore, the cylinder body is communicated with an external air supply pipeline through a plug, and a concave cavity is formed in the end part, corresponding to the plug, of the piston rod.

Furthermore, both ends of the piston rod are in sealing fit with the inner wall of the cylinder body, and a step surface on the piston rod is matched with one side, away from the spring, of the shifting fork.

Furthermore, the bottom end of the cylinder body is bolted with the top end of the power takeoff shell, the bottom end of the cylinder body is communicated with the top end of the power takeoff shell, and the shifting fork extends into the power takeoff shell through a through hole in the top end of the power takeoff shell.

Further, the output shaft is of a stepped structure.

Furthermore, the output gear is arranged on different step positions on the output shaft and can be matched with the meshing sleeve.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses in, realize the removal of shift fork through the cylinder block, the rethread shift fork drives the meshing cover and realizes the adjustment of drive ratio with the output gear meshing that corresponds, and the shift fork cover is established on the piston rod to one side and the cover of shift fork establish the spring fit on the piston rod, make the shift fork fixed, wherein the piston rod is preferred to be the stair structure, and step face on the piston rod just keeps away from one side cooperation of spring with the shift fork.

The cylinder block passes through end cap and outside air supply line intercommunication, and the tip department that the piston rod corresponds the end cap is equipped with the cavity, and when the air supply line air feed, high-pressure gas passes through inside the end cap gets into the cylinder block, and then promotes the removal of piston rod, then can drive the shift fork removal when the piston rod removes, and then the position of adjustment meshing cover realizes the adjustment of drive ratio.

Drawings

FIG. 1 is a side view of an adjustable ratio power take off;

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

fig. 3 is a schematic structural view of an adjusting mechanism in another embodiment.

In the figure: 1. an adjustment mechanism; 101. a cylinder block; 102. a piston rod; 103. a shifting fork; 104. a stroke chamber; 105. a spring; 106. a signal switch; 107. a plug; 108. a concave cavity; 2. a transmission mechanism; 201. an output shaft; 202. an engagement sleeve; 203. an output gear; 204. a power takeoff housing; 205. and a through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

an adjustable transmission ratio power takeoff comprises an adjusting mechanism 1 and a transmission mechanism 2:

the adjusting mechanism 1 comprises a cylinder body 101, a shifting fork 103 is sleeved on a piston rod 102 in the cylinder body 101, a stroke cavity 104 is arranged on the inner side of the cylinder body 101 corresponding to the shifting fork 103, a spring 105 is sleeved on the piston rod 102 between the side wall of the shifting fork 103 and the inner wall of the corresponding stroke cavity 104, one end of the piston rod 102 is in transmission connection with a signal switch 106 extending into the cylinder body 101, the other end of the piston rod 102 corresponds to a plug 107 at the end part of the cylinder body 101, and the spring 105 is positioned on one side of the shifting fork 103 away from the plug 107;

the transmission mechanism 2 comprises an output shaft 201, a meshing sleeve 202 and a plurality of output gears 203 are sleeved on the output shaft 201, and the shifting fork 103 is matched with the meshing sleeve 202.

In this embodiment, the shifting fork 103 is moved by the cylinder block 101, the shifting fork 103 drives the engaging sleeve 202 to engage with the corresponding output gear 203 to adjust the transmission ratio, the shifting fork 103 is sleeved on the piston rod 102, and one side of the shifting fork 103 is matched with the spring 105 sleeved on the piston rod 102, so that the shifting fork 103 is fixed, wherein the piston rod 102 is preferably of a step structure, and a step surface on the piston rod 102 is matched with the shifting fork 103 and one side far away from the spring 105.

The cylinder body 101 is communicated with an external air supply pipeline through a plug 107, a concave cavity 108 is formed in the end portion, corresponding to the plug 107, of the piston rod 102, when the air supply pipeline supplies air, high-pressure air enters the inside of the cylinder body 101 through the plug 107 to further push the piston rod 102 to move, and when the piston rod 102 moves, the shifting fork 103 is driven to move, so that the position of the meshing sleeve 202 is adjusted, and adjustment of the transmission ratio is achieved.

In order to accurately regulate and control the moving distance of the piston rod 102, a signal switch 106 is arranged at the top of the cylinder body 101, the bottom end of the signal switch 106 extends into the cylinder body 101 to be contacted with the end part, far away from the plug 107, of the piston rod 102, when the piston rod 102 moves, the moving distance triggers the signal switch 106, and when the preset distance is reached, the signal switch 106 sends a signal to the air supply pipeline to stop air supply and keeps the current state; when the piston rod is reset, the air supply pipeline is pumped or decompressed, and the piston rod 102 is reset through the spring 105.

In order to stabilize the movement of the piston rod 102 and maintain the automatic position, both ends of the piston rod 102 are sealingly engaged with the inner wall of the cylinder block 101, thereby preventing air leakage. At least the end of the piston rod 102 adjacent the plug 107 is ensured to remain in sealing engagement with the inner wall of the cylinder block 101.

In addition, the bottom end of the cylinder block 101 is bolted with the top end of the power take-off housing 204, the bottom end of the cylinder block 101 is communicated with the top end of the power take-off housing 204, and the shifting fork 103 extends into the power take-off housing 204 through a through hole 205 at the top end of the power take-off housing 204, so that the power take-off housing is assembled like a whole.

The output shaft 201 is of a stepped structure, the output gear 203 is arranged at different stepped positions on the output shaft 201 and can be matched with the meshing sleeve 202, so that the meshing sleeve 202 can be matched with different output gears 203 in the moving process, and the adjustment of the transmission ratio is realized.

As shown in fig. 3, in another embodiment, a transmission device can also be directly used to drive a push rod b (similar to the piston rod 102) to move back and forth to adjust the position of the shift fork 103, and a stop ring a is disposed at a suitable position on the push rod b for limiting, on one hand, the position of the shift fork 103, and on the other hand, the final moving position of the shift fork 103, so as to achieve a constant stroke of the shift fork 103, and also achieve a function of adjusting a transmission ratio.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a power takeoff of adjustable drive ratio, includes adjustment mechanism (1) and drive mechanism (2), its characterized in that:

the adjusting mechanism (1) comprises a cylinder body (101), a shifting fork (103) is sleeved on a piston rod (102) in the cylinder body (101), a stroke cavity (104) is arranged on the inner side, corresponding to the shifting fork (103), of the cylinder body (101), a spring (105) is sleeved on the piston rod (102) between the side wall of the shifting fork (103) and the inner wall of the corresponding stroke cavity (104), one end of the piston rod (102) is in transmission connection with a signal switch (106) extending into the cylinder body (101), the other end of the piston rod (102) corresponds to a plug (107) at the end of the cylinder body (101), and the spring (105) is located on one side, away from the plug (107), of the shifting fork (103);

the transmission mechanism (2) comprises an output shaft (201), a meshing sleeve (202) and a plurality of output gears (203) are sleeved on the output shaft (201), and the shifting fork (103) is matched with the meshing sleeve (202).

2. An adjustable ratio power take-off as claimed in claim 1, wherein: the cylinder body (101) is communicated with an external air supply pipeline through a plug (107), and a concave cavity (108) is formed in the end portion, corresponding to the plug (107), of the piston rod (102).

3. An adjustable ratio power take-off as claimed in claim 2, wherein: the two ends of the piston rod (102) are in sealing fit with the inner wall of the cylinder body (101), and the step surface on the piston rod (102) is matched with the shifting fork (103) and one side far away from the spring (105).

4. An adjustable ratio power take-off as claimed in claim 1, wherein: the bottom end of the cylinder body (101) is bolted with the top end of the power takeoff shell (204), the bottom end of the cylinder body (101) is communicated with the top end of the power takeoff shell (204), and the shifting fork (103) extends into the power takeoff shell (204) through a through hole (205) in the top end of the power takeoff shell (204).

5. An adjustable ratio power take-off as claimed in claim 1, wherein: the output shaft (201) is of a stepped structure.

6. An adjustable ratio power take-off as claimed in claim 5, wherein: the output gears (203) are arranged on different stepped parts on the output shaft (201) and can be matched with the meshing sleeve (202).