External buffer device for electromechanical actuator of high-speed tracked vehicle

Abstract

The invention discloses an external buffering device for an electromechanical actuator of a high-speed tracked vehicle. The external buffering device comprises an inner gear ring structure, an outer fixing seat ring, a buffering rubber block and a limiting piece. The inner gear ring structure and a fixed gear ring of a planetary transmission mechanism in the electromechanical actuator are integrally designed, and the inner gear ring of the inner gear ring structure serves as the fixed gear ring of the planetary transmission mechanism of the electromechanical actuator. The inner gear ring structure and the outer fixing seat ring are concentrically arranged, the inner gear ring structure is connected with the inner wall of the outer fixing seat ring through a buffer rubber block, and the inner gear ring structure and the outer fixing seat ring can rotate relatively; the position of the buffer rubber block corresponds to the space between the connecting flanges on the fixed shell of the electromechanical actuator; the outer fixing seat ring is fixedly connected with the electromechanical actuator fixing shell connecting flange and is mounted on an actuator mounting bracket on a side deck; the limiting piece penetrates through a limiting hole formed in the inner gear ring structure to be fixedly connected with a screw hole formed in a fixing shell of the electromechanical actuator and is used for limiting the deflection angle of the electromechanical actuator. The structure is compact, and the buffering capacity under the large alternating impact load is high.

Description

Technical Field

[0001] The invention relates to the technical field of tracked vehicle motion systems, and in particular to an external buffer device for an electromechanical actuator of a high-speed tracked vehicle. Background Art

[0002] Electromechanical suspension is a new type of suspension. One of its core technologies is to use electromechanical actuators to replace the damping elements of traditional suspension, so as to achieve real-time and rapid adjustment of suspension parameters, and actively output control force, so that the performance of the vehicle's motion system can reach the best under different working conditions. The working process of the electromechanical actuator is as follows: the road impact that high-speed tracked vehicles are always subjected to during off-road maneuvers is transmitted to the rocker arm of the electromechanical actuator through the road wheels, balance elbows, connecting rods, etc. The rocker arm drives the planetary transmission device inside the actuator, and the transmission device amplifies the movement of the rocker arm and transmits it to the motor, so that the motor rotor rotates to generate electricity and generate damping; in active working conditions, on the contrary, the torque generated by the motor is transmitted to the rocker arm through the transmission mechanism, and active control force is applied to the road wheels to realize the active function of the suspension system.

[0003] Since high-speed tracked vehicles have a large tonnage and high maneuvering speed, the road wheels will be subjected to a large impact load and will continue to bounce up and down when maneuvering on uneven roads. When this load and movement are transmitted to the actuator, the transmission mechanism in the actuator will be subjected to continuous large impact alternating loads. Setting a buffer mechanism can reduce the peak impact load and reduce the adverse effects of alternating loads on the transmission mechanism. The existing buffer mechanism is set inside the actuator, resulting in the buffer mechanism being smaller in size, weak in energy absorption capacity, and poor in heat dissipation conditions, and the performance and service life of the buffer device are limited. In addition, the internal buffer mechanism will cause the radial and lateral dimensions of the actuator located on the inner side of the vehicle body deck to increase, occupying the already tight space inside the vehicle. Summary of the invention

[0004] In view of this, the present invention provides an external buffer device for an electromechanical actuator of a high-speed tracked vehicle, which has a compact structure and a strong buffering capacity under large alternating impact loads.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An external buffer device for an electromechanical actuator of a high-speed tracked vehicle comprises an inner gear ring structure, an outer fixed seat ring, a buffer rubber block and a limiter;

[0007] The inner gear ring structure is integrated with the fixed gear ring of the planetary transmission mechanism inside the electromechanical actuator, and the inner gear ring of the inner gear ring structure serves as the fixed gear ring of the planetary transmission mechanism of the electromechanical actuator; the inner gear ring structure is concentrically arranged with the outer fixed seat ring, and the inner gear ring structure is connected to the inner wall of the outer fixed seat ring through a buffer rubber block, and the two can rotate relative to each other; the position of the buffer rubber block corresponds to the space between the connecting flanges on the fixed housing of the electromechanical actuator; the outer fixed seat ring is fixedly connected to the connecting flange of the fixed housing of the electromechanical actuator and is installed on the actuator mounting bracket on the side deck; the limit member passes through the limit hole provided on the inner gear ring structure and is fixedly connected to the inherent screw hole on the fixed housing of the electromechanical actuator, and is used to limit the deflection angle of the electromechanical actuator.

[0008] Furthermore, the inner gear ring structure, the outer fixed seat ring, and the buffer rubber block are integrally vulcanized through an integrated mold.

[0009] Furthermore, a transmission claw extending toward the outer fixed seat ring is provided on the outer circumference of the inner gear ring structure, and the position of the transmission claw corresponds to the position of the buffer rubber block.

[0010] Furthermore, the limiting hole on the inner gear ring structure is a waist-shaped hole, which corresponds to the position of the inherent screw hole on the fixed housing of the electromechanical actuator.

[0011] Furthermore, a groove is provided on the end surface of the outer fixed seat ring facing the fixed housing of the electromechanical actuator, and the groove matches the shape of the connecting flange; and a mounting through hole for fixing the buffer rubber block is provided between the connected grooves.

[0012] Furthermore, the transmission claw is vulcanized and connected to the inner surface of the buffer rubber block, and the outer surface of the buffer rubber block is vulcanized and connected to the inner wall surface of the mounting through hole.

[0013] Furthermore, the limiting member has a vulcanized rubber bushing or the limiting holes have vulcanized rubber bushings on both sides.

[0014] Furthermore, by changing the cross-sectional shape and width of the buffer rubber block and selecting rubber materials with different hardness specifications, external buffer devices with different stiffness and damping can be obtained.

[0015] Beneficial effects:

[0016] 1. The present invention realizes structural integration design with the electromechanical actuator, which is common with the original installation and fixing structure of the electromechanical actuator. There is no need to change the installation interface on the side deck of the vehicle body, and it does not occupy the lateral space inside the electromechanical actuator and near the side deck of the vehicle. It is convenient to arrange and install in the limited space outside the vehicle, overcoming the problem of compact layout space of tracked vehicles and solving the problem that the internal transmission mechanism of the electromechanical actuator is easily damaged under large alternating impact loads. Compared with the built-in buffer device, the external buffer device has a large radial force arm, strong buffering energy absorption effect and good heat dissipation effect. The split buffer rubber block has a long service life and is convenient for designing the stiffness characteristics of the buffer device.

[0017] Secondly, the setting of the limiter has two functions. On the one hand, the contact between the limiter and the limit hole is used to achieve the limiting effect to prevent the actuator from deflecting too much. On the other hand, this limiting form can realize the axial positioning between the inner gear ring structure, the outer fixed seat ring, and the electromechanical actuator fixed shell, ensuring that there is no axial relative displacement between the inner gear ring structure and the outer fixed seat ring, so that the buffer rubber block is in a pure torsional deformation state, ensuring the stability of the buffer device and extending the service life of the buffer device rubber block.

[0018] 2. The inner gear ring structure, the outer fixed seat ring and the buffer rubber block of the present invention are integrally vulcanized through an integrated mold, which can ensure the position accuracy between the inner gear ring structure and the outer fixed seat ring.

[0019] 3. The present invention vulcanizes the rubber bushing on the limiting member or on both sides of the limiting hole to achieve a buffering effect.

[0020] 4. The present invention can obtain the required external buffer mechanism with different stiffness and damping by changing the cross-sectional shape and width of the buffer rubber block and selecting rubber materials with different hardness specifications, and has wide applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the device of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the inner gear ring of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the outer fixed seat ring of the present invention.

[0024] Figure 4 This is the installation schematic diagram of the present invention and the electromechanical actuator.

[0025] Figure 5 This is the working principle diagram of the electromechanical actuator.

[0026] Among them, 1-inner gear ring structure, 2-outer fixed seat ring, 3-buffer rubber block I, 4-buffer rubber block II, 5-buffer rubber block III, 6-buffer rubber block IV, 7-limiting hole, 8-integrated installation and fixing structure, 9-inner gear ring transmission claw I, 10-inner gear ring transmission claw II, 11-inner gear ring transmission claw III, 12-inner gear ring transmission claw IV, 13-inner gear ring, 14-outer fixed seat ring annular surface, 15-planetary transmission device, 16-rocker arm, 17-electromechanical actuator fixed housing, 18-actuator mounting bracket, 19-fixing screw hole, 20-fixing bolt, 21-balance elbow, 22-road wheel, 23-connecting rod, 24-electromechanical actuator. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0028] The present invention provides an external buffer device for an electromechanical actuator of a high-speed tracked vehicle, comprising an inner gear ring structure 1, an outer fixed seat ring 2, a buffer rubber block and a limiter.

[0029] like Figure 1 , Figure 4 As shown, the inner gear ring structure 1 is integrated with the fixed gear ring of the planetary transmission mechanism inside the electromechanical actuator 24, and the inner gear ring 13 of the inner gear ring structure 1 serves as the fixed gear ring of the planetary transmission mechanism 15 of the electromechanical actuator 24, thereby realizing the structural integration of the buffer device and the electromechanical actuator 24, and there is no need to add an additional connection structure between the buffer mechanism and the electromechanical actuator 24; the inner gear ring structure 1 is concentrically arranged with the outer fixed seat ring 2, and the inner gear ring structure 1 is connected to the inner wall of the outer fixed seat ring 2 through a buffer rubber block, and the inner gear ring structure 1 and the outer fixed seat ring 2 can rotate relative to each other; the position of the buffer rubber block is connected to the fixed housing 17 of the electromechanical actuator The spaces between the flanges correspond to each other, that is, the buffer rubber block is a split structure, which is spaced and distributed on the outer fixed seat ring 2; the outer fixed seat ring 2 is fixedly connected to the flange of the electromechanical actuator fixed housing 17 and installed on the actuator mounting bracket 18 on the side deck, and the actuator mounting bracket 18 is welded on the vehicle side deck; the limiter passes through the limit hole 7 set on the inner gear ring structure 1 and is fixedly connected with the inherent fixing screw hole 19 on the electromechanical actuator fixed housing 17, which is used to limit the deflection angle of the electromechanical actuator 24 and realize the axial positioning between the inner gear ring structure 1, the outer fixed seat ring 2, and the electromechanical actuator fixed housing 17. In this embodiment, the limiter adopts a fixing bolt 20.

[0030] like Figure 2 As shown, the inner gear ring structure 1 is annular in shape as a whole, the inner ring is provided with teeth, namely the inner gear ring 13, and the outer circumference is provided with a transmission claw extending toward the outer fixed seat ring 2, and the position of the transmission claw corresponds to the position of the buffer rubber block. The limiting hole 7 on the inner gear ring structure 1 is a waist-shaped hole, corresponding to the position of the inherent fixing screw hole 19 on the fixed housing 17 of the electromechanical actuator ( Figure 4 The fixing screw holes 19 on the electromechanical actuator fixing housing 17 are not fully shown). The inner gear ring structure 1 has three functions: first, it serves as the gear ring of the planetary transmission device 15 inside the electromechanical actuator 24, realizes an integrated design with the electromechanical actuator 24, and directly bears the impact load transmitted to the actuator; second, it serves as the load input end of the buffer device, and transmits the impact load to the buffer rubber block through the inner gear ring transmission claw; third, the fixing bolts 20 on the inner gear ring structure 1 are used to realize the rotation angle limit function of the buffer device.

[0031] like Figure 3As shown, the outer fixed seat ring 2 is annular as a whole, the diameter of the hollow circle is consistent with the outer diameter of the electromechanical actuator fixed housing 17, and the radius of the whole circle is consistent with the length from the connecting flange to the center of the electromechanical actuator fixed housing 17. An integrated mounting and fixing structure 8 is provided on the outer fixed seat ring 2, and the integrated mounting and fixing structure 8 includes two designs. One is that a groove is provided on the end surface of the outer fixed seat ring 2 facing the electromechanical actuator fixed housing 17, and the groove matches the shape of the connecting flange. The outer fixed seat ring 2 and the electromechanical actuator fixed housing 17 are buckled together through the groove; the other is that a connecting hole II corresponding to the position of the connecting hole I on the connecting flange is provided at the groove, and also corresponds to the position of the connecting hole III on the actuator mounting bracket 18. By installing fasteners in the connecting holes I, II, and III, the outer fixed seat ring 2, the electromechanical actuator fixed housing 17, and the actuator mounting bracket 18 are connected together to achieve the installation of the buffer device and the actuator on the vehicle.

[0032] Between the connected grooves on the outer fixed seat ring 2, there are installation holes for fixing the buffer rubber block, and the inner wall surface of the installation hole is the outer fixed seat ring annular surface 14. In this embodiment, there are four spaces between the connecting flanges on the fixed housing 17 of the electromechanical actuator, that is, there are four installation holes for fixing the buffer rubber block on the outer fixed seat ring 2, and there are four buffer rubber blocks, namely, buffer rubber block I3, buffer rubber block II4, buffer rubber block III5, and buffer rubber block IV6; correspondingly, there are also four inner gear ring transmission claws, namely, inner gear ring transmission claw I9, inner gear ring transmission claw II10, inner gear ring transmission claw III11, and inner gear ring transmission claw IV12. Of course, two buffer rubber blocks and two transmission claws can also be set according to the required stiffness and damping. By changing the cross-sectional shape and width of the buffer rubber block and selecting rubber materials with different hardness specifications, external buffer devices with different stiffness and damping can also be obtained.

[0033] Preferably, the inner gear ring structure 1, the outer fixed seat ring 2, and the buffer rubber block are integrally vulcanized through an integrated mold to ensure the position accuracy between the inner gear ring structure 1 and the outer fixed seat ring 2. The transmission claw is vulcanized to the inner surface of the buffer rubber block, and the outer surface of the buffer rubber block is vulcanized to the annular surface 14 of the outer fixed seat ring.

[0034] The vulcanized rubber bushing on the fixing bolt 20 or the vulcanized rubber bushings on both sides of the limiting hole 7, the fixing bolt 20 passes through the limiting hole 7 and is connected to the fixing screw hole 19 on the electromechanical actuator fixed housing 17. When the inner gear ring structure 1 drives the buffer rubber block to rotate to the limit position, the rubber bushing on the fixing bolt 20 contacts the limiting hole 7 to achieve the limiting effect or the rubber bushing on the limiting hole 7 contacts the fixing bolt 20 to achieve the limiting effect, thereby avoiding excessive deflection angle of the actuator. At the same time, this limiting form can realize the axial positioning between the inner gear ring structure 1, the outer fixed seat ring 2, and the electromechanical actuator fixed housing 17, ensuring that there is no axial relative displacement between the inner gear ring structure 1 and the outer fixed seat ring 2, so that the buffer rubber block is in a pure torsional deformation state, ensuring the stability of the buffer device and extending the service life of the buffer rubber block of the buffer device. Different numbers of buffer devices can be set according to the tonnage of the tracked vehicle and the needs of use.

[0035] The function of the external buffer device of the electromechanical actuator is realized as follows: Figure 5 As shown, the road impact is transmitted to the rocker arm 16 of the electromechanical actuator 24 through the road wheel 22, the balance elbow 21, the connecting rod 23, etc. The rocker arm 16 drives the planetary transmission device 15 inside the actuator. When the load is transmitted to the inner ring gear 13, it will be transmitted to the external buffer device through the inner ring gear structure 1. At this time, relative rotation occurs between the inner ring gear structure 1 and the external fixed seat ring 2, and the buffering effect is achieved through the split buffer rubber block. When the impact load is large and causes the deflection angle of the inner ring gear structure 1 and the actuator to be large, the limit hole 7 set in the inner ring gear structure 1 will contact the fixing bolt 20 to achieve a limit effect, preventing the actuator from deflecting too much.

[0036] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An external buffer device for an electromechanical actuator of a high-speed tracked vehicle, characterized in that: It includes an inner gear ring structure, an outer fixed seat ring, a buffer rubber block and a limiter; The inner gear ring structure is integrated with the fixed gear ring of the planetary transmission mechanism inside the electromechanical actuator, and the inner gear ring of the inner gear ring structure serves as the fixed gear ring of the planetary transmission mechanism of the electromechanical actuator; the inner gear ring structure is concentrically arranged with the outer fixed seat ring, and the inner gear ring structure is connected to the inner wall of the outer fixed seat ring through a buffer rubber block, and the two can rotate relative to each other; the position of the buffer rubber block corresponds to the space between the connecting flanges on the fixed housing of the electromechanical actuator; the outer fixed seat ring is fixedly connected to the connecting flange of the fixed housing of the electromechanical actuator and is installed on the actuator mounting bracket on the side deck; the limit member passes through the limit hole provided on the inner gear ring structure and is fixedly connected to the inherent screw hole on the fixed housing of the electromechanical actuator, and is used to limit the deflection angle of the electromechanical actuator.

2. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 1, characterized in that: The inner gear ring structure, the outer fixed seat ring and the buffer rubber block are integrally vulcanized through an integrated mold.

3. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 1, characterized in that: The outer circumference of the inner gear ring structure is provided with a transmission claw extending toward the outer fixed seat ring, and the position of the transmission claw corresponds to the position of the buffer rubber block.

4. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 1, characterized in that: The limiting hole on the inner gear ring structure is a waist-shaped hole, which corresponds to the position of the inherent screw hole on the fixed housing of the electromechanical actuator.

5. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 2, characterized in that: A groove is provided on the end surface of the outer fixed seat ring facing the fixed housing of the electromechanical actuator, and the groove matches the shape of the connecting flange; and a mounting through hole for fixing the buffer rubber block is provided between the connected grooves.

6. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 5, characterized in that: The transmission claw is vulcanized and connected to the inner surface of the buffer rubber block, and the outer surface of the buffer rubber block is vulcanized and connected to the inner wall surface of the mounting through hole.

7. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to claim 1, characterized in that: The limiter is provided with a vulcanized rubber bushing or vulcanized rubber bushings on both sides of the limiter hole.

8. The external buffer device of the electromechanical actuator of a high-speed tracked vehicle according to any one of claims 1 to 7, characterized in that: By changing the cross-sectional shape and width of the buffer rubber block and selecting rubber materials with different hardness specifications, external buffer devices with different stiffness and damping can be obtained.

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