CN113819207A

CN113819207A - Torque and thrust conversion device

Info

Publication number: CN113819207A
Application number: CN202111265860.4A
Authority: CN
Inventors: 荆振育; 张东明; 原伟; 郑秋生
Original assignee: Jiaozuo Hongqiao Brake Ltd By Share Ltd
Current assignee: Jiaozuo Hongqiao Brake Ltd By Share Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2021-12-21

Abstract

The invention relates to a torque and thrust conversion device in the technical field of mechanical transmission devices, which comprises a case, a camshaft, a hollow cam, a guide assembly and a reset assembly, wherein both ends of the case are provided with a cover and an end cover, the outer wall of the middle part of the camshaft is integrally formed with a baffle disc, one side of the baffle disc is provided with a driven cam, the other side of the baffle disc is abutted to the reset assembly, the reset assembly is sleeved on the camshaft in a sliding manner, the camshaft is axially and slidably connected with a guide sleeve of the end cover through the guide assembly, the reset assembly is abutted to the guide sleeve, the hollow cam is rotatably sleeved on the camshaft, one end of the hollow cam is provided with a driving cam matched with the driven cam, the hollow cam is rotatably connected with the through hole wall of the cover through a rotary bearing, the outer wall is provided with a fluted disc, and a thrust bearing is arranged between the fluted disc and the cover. The device is convenient to machine and maintain, low in cost, quick to assemble, simple in overall structure, wide in application in compact-structure occasions, capable of achieving multi-level limiting protection in the working process and high in safety.

Description

Torque and thrust conversion device

Technical Field

The invention belongs to the technical field of mechanical transmission devices, and particularly relates to a torque and thrust conversion device.

Background

Torque and thrust conversion device can change the direct mode of promoting, have save space, reduce advantages such as intensity of labour and manufacturing cost, have obtained wide application in machinery, however current torque thrust conversion device adopts lead screw drive mode usually, and overall structure is complicated, and manufacturing cost is high, and processing and maintenance are inconvenient, and the assembly degree of difficulty is big, from this, need to improve urgently.

Disclosure of Invention

In order to solve the technical problem, the invention provides a torque and thrust conversion device which comprises a case, a camshaft, a hollow cam, a guide assembly and a reset assembly, wherein two ends of the case are respectively detachably connected with a cover and an end cover, the camshaft, the hollow cam, the guide assembly and the reset assembly are all arranged in the case, a baffle disc is integrally formed on the outer wall of the middle part of the camshaft, a driven cam is arranged on one side of the baffle disc, the other side of the baffle disc is abutted against the reset assembly, the reset assembly is sleeved on the camshaft in a sliding manner, a guide sleeve is arranged on the inner side of the end cover, the inner diameter of the guide sleeve is matched with the outer diameter of the camshaft, the camshaft is axially and slidably connected with the guide sleeve through the guide assembly, one end of the reset assembly, which is far away from the baffle disc, is abutted against the guide sleeve, the hollow cam is rotatably sleeved on the camshaft and arranged on the driven cam side of the baffle disc, the one end that hollow cam corresponds to driven cam is equipped with the initiative cam with driven cam matched with, the lower extreme of cover is equipped with the through-hole, hollow cam keeps away from the one end of initiative cam and passes through the through-hole wall rotation connection of slewing bearing and cover, and is equipped with the fluted disc on the outer wall at hollow cam middle part, be equipped with the thrust bearing who cup joints on hollow cam outer wall between fluted disc and the cover, quick-witted incasement is equipped with the actuating mechanism that can drive the fluted disc rotation, actuating mechanism and reset block drive initiative cam and driven cam keep away from each other or are close to, and then drive camshaft along through-hole axial displacement.

Preferably, the cover and the end cover are detachably connected with the case through bolts respectively, and assembly and maintenance are facilitated.

Preferably, the reset component adopts a disc spring group, the disc spring group has the characteristic of bearing large load with small deformation, is suitable for a structure with smaller requirement on axial space, has larger shock absorption capacity than a spiral spring, and is usually used for a structure with larger load, limited axial size and smaller working stroke. When a larger deformation is needed, a plurality of groups of spring pieces which are matched in a positive and negative way and overlapped can be arranged on the shaft.

Preferably, the direction subassembly is including locating the inboard guide way of uide bushing and can dismantle the direction parallel key of connection in the guide way, the one end that the cover was kept away from to the camshaft is equipped with the sliding tray with direction parallel key assorted, direction parallel key and sliding tray sliding connection provide the axial displacement direction to the camshaft through the direction subassembly.

Preferably, the inboard symmetry of uide bushing is provided with two guide ways, every all there is a direction parallel key through bolted connection in the guide way, correspond on the camshaft be equipped with two respectively with two guide parallel key sliding connection's sliding tray, can balance the atress of two direction parallel keys, extension device's life.

The hollow cam and the fluted disc can be fixedly connected after being processed in a split mode and can be processed integrally, preferably, the hollow cam and the fluted disc are of an integrated structure, the processing is convenient, the mechanical strength is high, and the reliability and the long-period use of the device are guaranteed.

Preferably, the driving mechanism comprises a reduction gear set which is rotatably connected in the case, a power input end of the reduction gear set is meshed with a gear shaft, a driving end of the gear shaft extends out of the case and is in transmission connection with a driving motor with an electrified brake, and a casing of the driving motor is connected to the case through a bolt. When the driving motor with the electrified brake works, the driving motor is electrified, the brake is powered off, and the brake is in a disconnected state; when the driving motor is powered off, the brake is powered on to keep a braking state, the cam shaft is prevented from being reset under the reset force of the reset assembly when the device is powered off, and the safety of the device is improved. The device can give in-place signals to the driving motor through the matched travel switch, ensure that the driving motor is powered off after rotating in place, enable the brake to be powered on and keep braking, and realize primary limit; the time limit can be set for the driving motor, and the power supply of the driving motor is cut off when the work reaches the time limit, so that the brake is powered on to keep braking, and secondary limit is realized; the camshaft of this device provides mechanical spacing by the end cover at the in-process that gos forward, runs into the end cover when the camshaft, can't continue the action, thereby the supporting protection device of driving motor is opened automatically to the driving motor electric current is too big and the driving motor outage is made, and then makes the brake get the electricity and keep the braking, realizes tertiary spacing.

The driving end of the gear shaft can also be driven by a hydraulic motor or a rotary cylinder, and a driving motor is preferably selected in the invention for facilitating the arrangement of the device. The invention drives the reduction gear set through the driving motor, and can safely and reliably realize thrust conversion with larger torque.

The invention also comprises other devices or components which can lead the torque and thrust conversion device to be normally used, and the devices or components are conventional technical means in the field; in addition, the devices and components which are not limited in the invention all adopt the conventional technical means in the field, such as a reduction gear set, a driving motor with an electric brake and the like.

The invention has the working principle that the hollow cam is arranged on the end cover through the rotary bearing and has the rotational freedom, the cam shaft is axially restricted by the guide flat key in the guide sleeve of the end cover, the rotational freedom is lost, and only the freedom of axial movement along the hollow cam is available. The fluted disc through hollow cam adds torque for hollow cam, and under the torque effect, hollow cam rotates, promotes the camshaft along axial motion with it complex to turn into axial thrust with the torque of input, the camshaft provides mechanical spacing by the end cover at the in-process that gos forward, when the end cover is touch to the camshaft, can't continue to move, guarantees that driven cam and initiative cam do not break away from each other when the biggest axial displacement takes place for the camshaft. When the electric vehicle works normally, the in-place signal is given through the travel switch, so that the driving motor stops working. Mechanical restraint is the last level of protection and is generally not used.

Compared with the prior art, the device has the advantages of convenient processing, lower cost, quick assembly and convenient maintenance; the whole structure is simple, and the application is wider in the occasion with compact structure; in addition, multistage spacing protection can be realized in the course of the work, and the security is high.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is an overall external structural view of the present invention in the embodiment.

Fig. 2 is a schematic internal structure diagram of the present invention with the chassis removed in the embodiment.

Fig. 3 is a perspective view of the end cap of the present invention in an embodiment.

Fig. 4 is a schematic perspective view of the present invention with the chassis, the reduction gear set, the driving motor and the cover removed.

Fig. 5 is a schematic diagram of the exploded structure of fig. 4.

Detailed Description

The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.

Examples

As shown in fig. 1 to 5, the invention provides a torque and thrust conversion device, which comprises a case 1, a camshaft 2, a hollow cam 3, a guide assembly and a reset assembly, wherein two ends of the case 1 are respectively connected with a cover 4 and an end cover 5 through bolts, the camshaft 2, the hollow cam 3, the guide assembly and the reset assembly are all arranged in the case 1, a baffle disc 6 is integrally formed on the outer wall of the middle part of the camshaft 2, a driven cam 7 is arranged on one side of the baffle disc 6, the other side of the baffle disc 6 is abutted to the reset assembly, the reset assembly is slidably sleeved on the camshaft 2, a guide sleeve 51 is arranged on the inner side of the end cover 5, the inner diameter of the guide sleeve 51 is matched with the outer diameter of the camshaft 2, the camshaft 2 is axially slidably connected with the guide sleeve 51 through the guide assembly, one end of the reset assembly, which is far away from the baffle disc 6, is abutted to the guide sleeve 51, hollow cam 3 rotates to cup joint on camshaft 2 and locates the driven cam 7 side that keeps off dish 6, hollow cam 3 is equipped with the initiative cam 8 with driven cam 7 matched with corresponding to the one end of driven cam 7, the lower extreme of cover 4 is equipped with the through-hole, hollow cam 3 keeps away from the one end of initiative cam 8 and passes through slewing bearing 9 and cover 4's through-hole wall rotation to be connected, and is equipped with fluted disc 10 on the outer wall at hollow cam 3 middle part, be equipped with the thrust bearing 11 of cup jointing on hollow cam 3 outer wall between fluted disc 10 and the cover 4, be equipped with in the quick-witted case 1 and drive the actuating mechanism that can drive fluted disc 10 is rotatory, actuating mechanism and reset block drive initiative cam 8 and driven cam 7 keep away from each other or are close to, and then drive camshaft 2 is along through-hole axial displacement.

The reset component adopts a disc spring group 12, the disc spring group 12 has the characteristic of bearing large load with small deformation, is suitable for a structure with smaller axial space requirement, has larger shock absorption capacity than a spiral spring, and is commonly used for a structure with larger load, limited axial size and smaller working stroke. When a larger deformation is needed, a plurality of groups of spring pieces which are matched in a positive and negative way and overlapped can be arranged on the shaft. The direction subassembly is including locating two guide ways 13 and two direction parallel keys 14 of uide bushing 51 inboard and symmetric distribution, all has a direction parallel key 14 through bolted connection in every guide way 13, the one end that cover 4 was kept away from to camshaft 2 is equipped with two and leads parallel key 14 assorted sliding tray 15, direction parallel key 14 and sliding tray 15 sliding connection provide the axial displacement direction to camshaft 2 through the direction subassembly. The hollow cam 3 and the fluted disc 10 adopt an integrated structure, are convenient to process and high in mechanical strength, and are favorable for ensuring the reliability and long-period use of the device.

The driving mechanism comprises a reduction gear set 16 which is rotatably connected in the case 1, the power input end of the reduction gear set 16 is connected with a gear shaft 17 in a meshed mode, the driving end of the gear shaft 17 extends out of the case 1 and is connected with a driving motor 18 with a power-on brake in a transmission mode, and the shell of the driving motor 18 is connected to the case 1 through bolts. When the driving motor 18 with the electrified brake works, the driving motor 18 is electrified, the brake is powered off, and the brake is in a disconnected state; when the driving motor 18 is powered off, the brake is powered on to keep a braking state, the cam shaft 2 is prevented from resetting under the resetting force of the disc spring group 12 when the device is powered off, and the safety of the device is improved. The device gives an in-place signal to the driving motor 18 through a matched travel switch (not shown in the figure), ensures that the driving motor 18 is powered off after rotating in place, enables the brake to be powered on and keeps braking, and realizes primary limiting; by setting a time limit for the driving motor 18, when the work reaches the time limit, the power supply of the driving motor 18 is cut off, so that the brake is powered on to keep braking, and secondary limit is realized; the camshaft 2 of this device is provided mechanical spacing by end cover 5 at the in-process that advances, when camshaft 2 runs into end cover 5, can't continue the action, thereby the supporting protection device of driving motor 18 makes driving motor 18 outage, and then makes the brake get the electricity and keep braking, realizes tertiary spacing by the automatic protection device that opens driving motor 18 of drive motor 18 electric current too big. The device drives the reduction gear set 16 through the driving motor 18, and can safely and reliably realize thrust conversion of large torque.

The working principle of the invention is that the hollow cam 3 is arranged on the cover 4 through the rotary bearing 9 and has a rotational degree of freedom, the camshaft 2 is axially restrained by the guide flat key 14 in the guide sleeve 51 of the end cover 5, the rotational degree of freedom is lost, and only the degree of freedom moves axially along the hollow cam 3. The fluted disc 10 through hollow cam 3 adds torque for hollow cam 3, and under the torque effect, hollow cam 3 rotates, promotes camshaft 2 along axial motion with it complex to turn into axial thrust with the torque of input, camshaft 2 provides machinery spacing by end cover 5 at the advancing in-process, runs into end cover 5 when camshaft 2 is touchhed, can't continue the action, guarantees that driven cam 7 and initiative cam 8 do not break away from each other when camshaft 2 takes place maximum axial displacement. During normal operation, a position signal is given through a travel switch, so that the driving motor 18 stops working, and mechanical limit is the last-stage protection and cannot be used generally.

Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.

Claims

1. A torque to thrust conversion device, characterized by: the device comprises a case, a cam shaft, a hollow cam, a guide assembly and a reset assembly, wherein a cover and an end cover are detachably connected to two ends of the case respectively, the cam shaft, the hollow cam, the guide assembly and the reset assembly are arranged in the case, a baffle disc is integrally formed on the outer wall of the middle part of the cam shaft, a driven cam is arranged on one side of the baffle disc, the other side of the baffle disc is abutted to the reset assembly, the reset assembly is sleeved on the cam shaft in a sliding mode, a guide sleeve is arranged on the inner side of the end cover, the inner diameter of the guide sleeve is matched with the outer diameter of the cam shaft, the cam shaft is axially and slidably connected with the guide sleeve through the guide assembly, one end, away from the baffle disc, of the reset assembly is abutted to the guide sleeve, the hollow cam is rotatably sleeved on the cam shaft and is arranged on the driven cam side of the baffle disc, and a driving cam matched with the driven cam is arranged at one end, corresponding to the driven cam, the lower extreme of cover is equipped with the through-hole, the one end that the initiative cam was kept away from to hollow cam is passed through slewing bearing and is connected with the through-hole wall rotation of cover, and is equipped with the fluted disc on the outer wall at hollow cam middle part, be equipped with the thrust bearing who cup joints on hollow cam outer wall between fluted disc and the cover, the quick-witted incasement is equipped with the actuating mechanism that can drive the fluted disc rotation, actuating mechanism and reset block drive initiative cam and driven cam keep away from each other or are close to, and then drive camshaft along through-hole axial displacement.

2. The torque to thrust conversion device of claim 1, wherein: the cover and the end cover are detachably connected with the case through bolts respectively.

3. The torque to thrust conversion device of claim 1, wherein: the reset assembly adopts a disc spring assembly.

4. The torque to thrust conversion device of claim 1, wherein: the direction subassembly is including locating the inboard guide way of uide bushing and can dismantle the direction parallel key of connection in the guide way, the one end that the cover was kept away from to the camshaft is equipped with and leads parallel key assorted sliding tray, direction parallel key and sliding tray sliding connection.

5. The torque to thrust conversion device of claim 4, wherein: the inner side of the guide sleeve is symmetrically provided with two guide grooves, each guide groove is internally connected with a guide flat key through a bolt, and the camshaft is correspondingly provided with two sliding grooves which are respectively in sliding connection with the two guide flat keys.

6. The torque to thrust conversion device of claim 1, wherein: the hollow cam and the fluted disc are of an integrated structure.

7. The torque to thrust conversion device according to any one of claims 1 to 6, wherein: the driving mechanism comprises a reduction gear set which is rotatably connected in the case, the power input end of the reduction gear set is connected with a gear shaft in a meshed mode, the driving end of the gear shaft extends out of the case and is in transmission connection with a driving motor with an electrified brake, and the casing of the driving motor is connected to the case through a bolt.