CN216951559U

CN216951559U - Elastic sheet type driver and electro-hydraulic hybrid power steering gear

Info

Publication number: CN216951559U
Application number: CN202220489287.9U
Authority: CN
Inventors: 王喜久; 温圣灼; 李鹏; 逄立深; 路琳
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-07-12
Anticipated expiration: 2032-03-08

Abstract

The utility model belongs to the technical field of power-assisted steering devices of commercial vehicles and discloses a spring sheet type driver and an electro-hydraulic hybrid power-assisted steering device, wherein the spring sheet type driver is arranged between a speed reducing mechanism and a motor and comprises a first driver, a second driver, a spring sheet and a fixed sleeve, one end of the first driver is fixed on a main shaft of the speed reducing mechanism, and a clamping bulge is arranged on the other end of the first driver in the circumferential direction; one end of the second driver is fixed on a main shaft of the motor, a clamping groove is formed in the circumferential direction of the other end of the second driver, and the clamping protrusion and the clamping groove are connected in a matched mode to achieve torque transmission; the elastic sheet clamp is arranged between the clamping convex and the clamping groove; the fixing sleeve is sleeved on the first driver and the second driver to at least cover part of the elastic sheet, and two ends of the elastic sheet are respectively abutted against the clamping groove and the fixing sleeve. The utility model is beneficial to improving the coaxiality of the speed reducing mechanism and the motor, reducing the transmission noise and avoiding the delay of moment transmission, thereby prolonging the service life of the speed reducing mechanism and the motor; the electro-hydraulic hybrid power steering gear is suitable for commercial vehicles and has high reliability.

Description

Elastic sheet type driver and electro-hydraulic hybrid power steering gear

Technical Field

The utility model relates to the technical field of power-assisted steering devices for commercial vehicles, in particular to a spring sheet type driver and an electro-hydraulic hybrid power-assisted steering device.

Background

At present, in home and abroad electro-hydraulic hybrid and pure electric power-assisted steering devices, the transmission mode between a speed reducing mechanism and a motor is mostly straight-tooth spline transmission or the transmission mode that a rubber pad is arranged between two matched bosses. Straight-tooth spline transmission structure, because there is the error in the machining and the assembly precision of reduction gears and motor, can cause the axiality of reduction gears and motor and the straightness that hangs down of reduction gears and motor casing terminal surface to produce the deviation, cause irregularity, production moment fluctuation when reduction gears and motor drive to the wearing and tearing of the relevant position bearing of reduction gears and relevant position have been accelerated, make the life-span of reduction gears and motor all reduce greatly, thereby can produce serious abnormal sound along with the wearing and tearing of relevant part moreover. The transmission mode of installing the rubber pad between two pairs of boss, if the time of depositing is overlength, deposit improper or operational environment is abominable, the rubber can be very easily aged, leads to the transmission mechanism premature failure, and the rubber pad deflection is big in addition, can appear the phenomenon that the transmission is unstable, the card is pause in the operation in-process, even produces the abnormal sound.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spring sheet type driver and an electro-hydraulic hybrid power steering gear, which are used for solving the problem of service life of a transmission structure between a speed reducing mechanism and a motor.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a leaf spring type actuator provided between a reduction mechanism and a motor, the leaf spring type actuator comprising:

one end of the first transmission is fixed on a main shaft of the speed reducing mechanism, and a clamping bulge is arranged on the other end of the first transmission in the circumferential direction;

one end of the second driver is fixed on a main shaft of the motor, a clamping groove is formed in the circumferential direction of the other end of the second driver, and the clamping protrusion and the clamping groove are connected in a matched mode to achieve torque transmission;

the elastic sheets are clamped between the outer side wall of the clamping boss and the inner side wall of the clamping groove, and the elastic sheets are uniformly arranged along the circumferential direction of the first driver and the second driver;

the fixing sleeve is sleeved on the first driver and the second driver to cover at least part of the elastic sheet, and two ends of the elastic sheet respectively abut against the clamping groove and the fixing sleeve.

Optionally, the clamping protrusions and the clamping grooves are respectively provided with a plurality of clamping protrusions and a plurality of clamping grooves in one-to-one correspondence, and the clamping protrusions and the clamping grooves are respectively arranged along the circumferential intervals and the uniform distribution of the first driver and the second driver.

Optionally, the elastic sheet is arranged on two sides of each clamping protrusion.

Optionally, the elastic piece is a metal elastic piece.

Optionally, lubricating grease is arranged between the outer side wall of the clamping protrusion and the elastic sheet.

Optionally, lubricating grease is arranged between the inner side wall of the clamping groove and the elastic sheet.

Optionally, the fixing sleeve is in interference fit connection or threaded connection with the first transmission and/or the second transmission.

Optionally, end surfaces of the fixed sleeve and the first actuator facing the speed reducing mechanism abut against the end surface of the speed reducing mechanism, and the elastic sheet is completely covered by the fixed sleeve along the axial direction.

Optionally, one of the first driver and the second driver is a cylindrical shell structure, and the other one of the first driver and the second driver is a cylindrical structure, and the cylindrical shell structure can be sleeved outside the cylindrical structure to form a matching body with the cylindrical structure.

The utility model also provides an electro-hydraulic hybrid power steering gear which comprises the elastic sheet type driver, a speed reducing mechanism and a motor, wherein the elastic sheet type driver is arranged between the speed reducing mechanism and the motor.

The utility model has the beneficial effects that:

according to the elastic sheet type driver, the first driver and the second driver are connected through the matching of the clamping protrusions and the clamping grooves, the elastic sheets are arranged in the clamping protrusions and the clamping grooves and limited through the fixing sleeves, and the elastic sheets play a role in elastically transmitting torque, so that the coaxiality of the speed reducing mechanism and the motor is favorably improved, the transmission noise is reduced, the moment transmission delay is avoided, and the service lives of the speed reducing mechanism and the motor are prolonged.

The electro-hydraulic hybrid power steering gear provided by the utility model has the advantages that the first transmission device and the second transmission device are arranged between the speed reducing mechanism and the motor to transmit the torque, the electro-hydraulic hybrid power steering gear is smooth in operation and high in reliability due to the arrangement of the elastic sheet and the fixed sleeve, the service lives of the speed reducing mechanism and the motor can be greatly prolonged, and meanwhile, the steering noise can be reduced due to the elastic transmission of the torque.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a leaf spring type driver provided by the utility model;

fig. 2 is an exploded schematic view of a shrapnel type driver provided by the utility model.

In the figure:

1. a leaf spring type driver; 11. a first actuator; 111. clamping convex; 12. a second driver; 121. a card slot; 13. a spring plate; 14. fixing a sleeve; 2. a speed reduction mechanism; 3. an electric motor.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

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, removably 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 as appropriate by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. 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.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning. The term "plurality" is to be understood as more than two.

The utility model provides a spring sheet type driver 1, as shown in fig. 1 and 2, which is arranged between a speed reducing mechanism 2 and a motor 3, wherein the spring sheet type driver 1 comprises a first driver 11, a second driver 12, a spring sheet 13 and a fixed sleeve 14, wherein one end of the first driver 11 is fixed on a main shaft of the speed reducing mechanism 2, and a clamping bulge 111 is arranged on the other end in the circumferential direction; one end of the second driver 12 is fixed on the main shaft of the motor 3, a clamping groove 121 is formed in the circumferential direction of the other end of the second driver, and the clamping protrusion 111 and the clamping groove 121 are connected in a matched mode to achieve torque transmission; the elastic sheets 13 are arranged in a plurality, the elastic sheets 13 are clamped between the outer side wall of the clamping boss 111 and the inner side wall of the clamping groove 121, and the elastic sheets 13 are uniformly arranged along the circumferential direction of the first driver 11 and the second driver 12; the fixing sleeve 14 is sleeved on the first driver 11 and the second driver 12 to cover at least a part of the elastic sheet 13, and two ends of the elastic sheet 13 respectively abut against the clamping groove 121 and the fixing sleeve 14.

The first transmission 11 is rigidly connected to the main shaft of the reduction mechanism 2, the second transmission 12 is rigidly connected to the main shaft of the motor 3, and the rigid connection may be by welding or the like. The positions of the first driver 11 and the second driver 12 can be interchanged, the positions of the clamping protrusion 111 and the clamping groove 121 can be interchanged, and the clamping protrusion 111 and the clamping groove 121 are used for realizing clamping and rotation transmission between the first driver 11 and the second driver 12 and realizing torque transmission during rotation so that the motor 3 drives the speed reducing mechanism 2 to rotate. The fixing sleeve 14 is sleeved on the first driver 11 and the second driver 12 and is used for limiting the elastic sheet 13 from separating between the clamping protrusion 111 and the clamping groove 121 during working. In a preferable scheme, the width of the elastic sheet 13 is equal to the radial depth of the clamping protrusion 111 or the clamping groove 121, the length of the elastic sheet 13 is equal to the axial depth of the clamping protrusion 111 or the clamping groove 121, and the axial depths of the clamping protrusion 111 and the clamping groove 121 are both smaller than the axial lengths of the first driver 11 and the second driver 12, so that when the clamping protrusion 111 and the clamping groove 121 are matched with each other and clamped to be connected, the end of the clamping protrusion 111 can be stopped against the groove bottom of the clamping groove 121 in the axial direction to limit, and stable connection of the axial position is ensured.

According to the elastic sheet type driver 1, the first driver 11 and the second driver 12 are connected through the matching of the clamping protrusions 111 and the clamping grooves 121, the elastic sheets 13 are arranged in the clamping protrusions 111 and the clamping grooves 121 and limited through the fixing sleeves 14, and the elastic sheets 13 play a role in elastically transmitting torque, so that the coaxiality of the speed reducing mechanism 2 and the motor 3 is favorably improved, and the service lives of the speed reducing mechanism 2 and the motor 3 are prolonged.

Optionally, a plurality of clamping protrusions 111 and clamping grooves 121 are respectively provided, the plurality of clamping protrusions 111 and the plurality of clamping grooves 121 are arranged in a one-to-one correspondence, and the clamping protrusions 111 and the clamping grooves 121 are respectively spaced and uniformly distributed along the circumferential direction of the first driver 11 and the second driver 12.

As shown in fig. 1 and fig. 2, in the preferred embodiment of the present invention, four locking protrusions 111 are formed at one end of the first transmission 11 away from the speed reducing mechanism 2, and four locking grooves 121 are formed at one end of the second transmission 12 away from the motor 3, and are formed at one end of the first transmission 11 and the second transmission 12, and are uniformly distributed at 90 ° in the circumferential direction. When the first driver 11 is sleeved with the second driver 12, the clamping protrusion 111 is matched with the clamping groove 121 to realize clamping, the elastic sheet 13 is arranged on a torque transmission stress surface in the rotation direction of the motor 3, when the motor 3 rotates, the spindle of the motor 3 drives the second driver 12 to rotate, and further the torque is transmitted to the elastic sheet 13, the elastic sheet 13 transmits the torque to the first driver 11 after being stressed and deformed, in the process, the elastic sheet 13 realizes the elastic torque transmission between the first driver 11 and the second driver 12, namely the elastic torque transmission between the motor 3 and the speed reducing mechanism 2, the elastic torque transmission increases the buffer between the motor 3 and the speed reducing mechanism 2, and is beneficial to reducing friction. It should be noted that, in the preferred embodiment, although one of the first driver 11 and the second driver 12 is a cylindrical shell structure and the other is a cylindrical body structure, the locking protrusion 111 is a protrusion structure with a certain radial thickness (for example, the first driver 11 may be a multi-claw structure with a certain thickness), and a protrusion structure with a certain thickness is also arranged between two adjacent locking grooves 121, so as to ensure the structural strength of the locking protrusion 111 and the locking groove 121.

Optionally, the elastic pieces 13 are disposed on both sides of each snap projection 111.

Based on the change of the rotation direction of the motor 3, the elastic sheets 13 are arranged on the two sides of the clamping protrusions 111, all the elastic sheets 13 have the characteristic of being uniformly distributed in the circumferential direction of the first transmission device 11, eight elastic sheets 13 are arranged in the embodiment with the four clamping protrusions 111 and the four clamping grooves 121 matched, and the thickness of different elastic sheets 13 and the size of the clamping protrusions 111 can be set according to different loads so as to ensure the reliability of torque transmission.

Optionally, the elastic sheet 13 is a metal elastic sheet.

The thickness of the elastic sheet 13 and the size of the clamping protrusion 111 are designed, so that the elastic transmission of the torque can be realized, certain rigidity can be kept, and the delay in the torque transmission process is avoided. The aging speed of the elastic sheet 13 made of metal material is far lower than that of a rubber pad adopted in the prior art, so that the service life and the reliability of the elastic sheet type driver 1 are greatly improved. And the metal piece has good elasticity, which is beneficial to reducing the transmission noise.

Optionally, grease is provided between the outer sidewall of the snap projection 111 and the elastic sheet 13, and the elastic sheet 13 is disposed against the outer sidewall of the snap projection 111.

Optionally, lubricating grease is arranged between the inner side wall of the clamping groove 121 and the elastic sheet 13, and the elastic sheet 13 is arranged to be attached to the inner side wall of the clamping groove 121.

It can be understood that in the embodiment, a proper amount of grease is applied between the two contact side walls of the clamping protrusion 111 and the clamping groove 121, so that the buffer between the first transmission 11 and the second transmission 12 can be increased, the grease plays a role in shock absorption and wear reduction in the working process, and the grease is prevented from being applied too much to cause overflow when being applied.

Optionally, the fixing sleeve 14 is connected with the first transmission 11 and/or the second transmission 12 by interference fit or by screw thread.

In this embodiment, the fixing sleeve 14 is mainly used to limit the radial displacement of the elastic sheet 13, so as to prevent the elastic sheet 13 from coming out from the gap between the locking protrusion 111 and the locking groove 121 during operation. When the fixed sleeve 14 is fixed on the first driver 11 in an interference or threaded manner, after the clamping groove 121 on the second driver 12 is aligned with the clamping protrusion 111 on the first driver 11, the second driver 12 is directly inserted into the fixed sleeve 14 so that the clamping protrusion 111 is connected with the clamping groove 121 in a matching manner, and the elastic pieces can be fixed on the inner side walls of the two sides of the clamping groove 121 through lubricating grease in advance. Conversely, the fastening sleeve 14 can also be pre-connected to the second transmission 12. The fixing sleeve 14 is fixed on the first driver 11 and the second driver 12, can radially limit the elastic sheet 13, and can improve the coaxiality between the first driver 11 and the second driver 12.

Alternatively, the end faces of the fixing sleeve 14 and the first actuator 11 facing the reduction mechanism 2 abut against the end face of the reduction mechanism 2, and the elastic pieces 13 are completely covered by the fixing sleeve 14 in the axial direction.

Firstly, the fixing sleeve 14 completely covers the elastic sheet 13 along the axial direction, so that on one hand, stable limit on the elastic sheet 13 is realized, on the other hand, the contact surface between the fixing sleeve 14 and the elastic sheet 13 can be increased, and the effect of rigid torque transmission is ensured; moreover, the fixing sleeve 14 completely covers the elastic sheet 13, and simultaneously seals the connecting gap between the clamping protrusion 111 and the clamping groove 121, so that the lubricating grease on the two sides of the elastic sheet 13 can be sealed, and the lubricating grease is prevented from leaking or overflowing. It will be understood that the internal diameter of the fixing sleeve 14 is equal to the external diameter of the first transmission 11 and equal to the external diameter of the second transmission 12, where the external diameters are both referred to as the maximum external diameter, in order to facilitate a good contact sealing and fixing between the fixing sleeve 14 and the first and

second transmissions

11 and 12.

Secondly, as shown in fig. 1, the left ends of the fixed sleeve 14 and the first driver 11 are both stopped against the end face of the speed reducing mechanism 2, which is beneficial to the axial limit of the fixed sleeve 14 and the first driver 11, so that the clamping groove 121 on the second driver 12 can be completely matched and abutted against the clamping protrusion 111 in the axial direction, and rigid contact and connection are realized.

The elastic sheet type driver 1 is particularly suitable for transmission connection between a speed reducing mechanism 2 and a motor 3 in a commercial vehicle electro-hydraulic hybrid power steering gear, the electro-hydraulic hybrid power steering gear comprises the elastic sheet type driver 1, the speed reducing mechanism 2 and the motor 3, and the elastic sheet type driver 1 is arranged between the speed reducing mechanism 2 and the motor 3. Preferably, the fixing sleeve 14 is a steel sleeve, and is installed by matching with the cylindrical surface of the first transmission 11 or the second transmission 12, so as to prevent the spring 13 from being ejected and grease from overflowing.

According to the characteristic of large load of a commercial vehicle, the electro-hydraulic hybrid power steering gear transmits torque by arranging the first driver 11 and the second driver 12 between the speed reducing mechanism 2 and the motor 3, and due to the arrangement of the elastic sheet 13 and the fixed sleeve 14, the electro-hydraulic hybrid power steering gear has smooth operation and high reliability, the service lives of the speed reducing mechanism 2 and the motor 3 can be greatly prolonged, and meanwhile, the elastic transmission of the torque can reduce steering and transmission noise and avoid torque transmission delay.

It should be noted that the motor 3 as the motive output mechanism is not limited to the motor 3 in the present application, but may be other torque output power sources, and the elastic sheet type driver provided by the present invention realizes elastic torque transmission through the output end of the corresponding torque output power source, and has low noise and high reliability.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. 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 leaf spring type actuator provided between a reduction mechanism (2) and a motor (3), characterized in that the leaf spring type actuator (1) comprises:

one end of the first transmission (11) is fixed on a main shaft of the speed reducing mechanism (2), and a clamping protrusion (111) is arranged on the other end of the first transmission (11) in the circumferential direction;

one end of the second driver (12) is fixed on a main shaft of the motor (3), a clamping groove (121) is formed in the circumferential direction of the other end of the second driver (12), and the clamping protrusion (111) and the clamping groove (121) are connected in a matched mode to achieve torque transmission;

the elastic sheets (13) are arranged in a plurality of numbers, the elastic sheets (13) are clamped between the outer side wall of the clamping boss (111) and the inner side wall of the clamping groove (121), and the elastic sheets (13) are uniformly arranged along the circumferential direction of the first driver (11) and the second driver (12);

fixed cover (14), fixed cover (14) cover is established first actuator (11) with in order to cover at least part on second actuator (12) shell fragment (13), the both ends of shell fragment (13) stop respectively in draw-in groove (121) with fixed cover (14).

2. The leaf spring type driver according to claim 1, characterized in that the clamping protrusions (111) and the clamping grooves (121) are respectively provided in a plurality, the clamping protrusions (111) and the clamping grooves (121) are arranged in a one-to-one correspondence, and the clamping protrusions (111) and the clamping grooves (121) are respectively spaced and uniformly distributed along the circumferential direction of the first driver (11) and the second driver (12).

3. The leaf-spring type actuator according to claim 2, characterized in that the leaf spring (13) is arranged on both sides of each snap projection (111).

4. A leaf spring actuator according to claim 1, wherein the spring (13) is a metal spring.

5. The leaf spring type actuator according to claim 1, characterized in that grease is provided between the outer side wall of the snap projection (111) and the leaf spring (13).

6. The leaf spring type actuator according to claim 1, wherein grease is provided between the inner side wall of the slot (121) and the leaf spring (13).

7. The leaf spring type transmission according to claim 1, characterized in that the fixing sleeve (14) is connected with the first transmission (11) and/or the second transmission (12) in an interference fit or in a threaded manner.

8. The leaf spring type transmission according to claim 1, characterized in that the end faces of the fixing sleeve (14) and the first transmission (11) facing the reduction mechanism (2) abut against the end face of the reduction mechanism (2), the fixing sleeve (14) completely covering the leaf spring (13) in the axial direction.

9. The blade-elastic driver according to claim 1, characterized in that one of the first driver (11) and the second driver (12) is a cylindrical shell structure and the other is a cylindrical body structure, and the cylindrical shell structure can be sleeved on the outer side of the cylindrical body structure to form a matching body with the cylindrical body structure.

10. An electro-hydraulic hybrid power steering gear, characterized by comprising a leaf spring type transmission (1) according to any one of claims 1 to 9, and a speed reducing mechanism (2) and an electric motor (3), the leaf spring type transmission (1) being arranged between the speed reducing mechanism (2) and the electric motor (3).