A mechanically controlled automatic separation acceleration device

Abstract

The present invention relates to a mechanically controlled automatically detachable acceleration device, comprising: a driving motor, a coupling, a seat bearing, a ball spline shaft, a spline connecting shaft, a moving device, a rolling fork, a connecting disk, and a tire device; the driving motor is fixed on a motor seat, the output shaft of the driving motor is connected to the ball spline shaft through the coupling, the ball spline shaft is supported by the seat bearing and radially and axially positioned by a set screw, the spline connecting shaft is matched with the ball spline shaft, the moving device is fixed on a mounting seat and is fastened to a nut installed on the rolling fork by a ball screw, one end of the connecting disk is connected to the spline connecting shaft through a connecting flange, and the other end of the connecting disk is connected to the tire device; the present invention realizes rapid acceleration and separation of an experimental tire, and adopts a mechanical acceleration method that is safe, reliable, and efficient.

Description

Technical Field

[0001] The invention relates to the field of axial power output and separation mechanism, in particular to a mechanically controlled automatic separation acceleration device. Background Art

[0002] At present, during the tire acceleration impact test, the force is mainly transmitted through friction. When the friction coefficient remains unchanged, that is, the friction material is determined, as the driving force increases, the positive pressure of the contact surface also increases to ensure that there is no relative sliding, the loss to the shaft and bearing is high and the speed accuracy control is relatively poor. In order to overcome these problems, the present invention provides a mechanically controlled automatically detachable acceleration device, which has the advantages of simple structure, convenient disassembly and assembly, accurate control of the output speed in the connected state, no relative rotation of the disc-type ratchet structure, reduced friction loss, long service life, easy maintenance, etc. Summary of the invention

[0003] The purpose of the present invention is to provide a mechanically controlled automatic separation acceleration device which has a simple and durable structure, axial drive, no relative sliding friction, efficient driving force connection and separation, convenient and quick installation and disassembly, and is suitable for radial displacement of the output shaft.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] The present invention provides a mechanically controlled automatically detachable acceleration device, comprising: a driving motor, a coupling, a seat bearing, a ball spline shaft, a spline connecting shaft, a moving device, a rolling fork, a connecting plate, and a tire device; the driving motor is fixed on a motor seat, the output shaft of the driving motor is connected to the ball spline shaft through the coupling, the ball spline shaft is supported by the seat bearing and is radially and axially positioned by a set screw, the spline connecting shaft is cooperatively connected to the ball spline shaft to achieve axial relative sliding while transmitting torque, the moving device is fixed on a mounting seat and is fastened to a nut installed on the rolling fork through a ball screw, the rolling fork roller is installed in two positioning shoulders of the spline connecting shaft, one end of the connecting plate is connected to the spline connecting shaft through a connecting flange, and the other end of the connecting plate is connected to the tire device.

[0006] Furthermore, the rolling fork includes: a U-shaped frame, a roller, a bearing, a small round nut, a roller shaft, and a nut mounting hole; the rolling fork is a centrally symmetrical structure, the nut mounting hole is located in the middle position directly below the U-shaped frame, the inner ring of the bearing is installed on the roller shaft and is axially positioned by the small round nut and the shoulder, the outer ring is hot-fitted and fixed to the roller, and the roller shaft is oppositely installed on the U-shaped frame through the shaft hole, and is axially positioned by the shaft retaining ring to form a rolling fork structure; the two rollers are centrally symmetrically distributed on both sides of the axis of the spline connecting shaft, the rollers are in tangential contact with the positioning shoulders of the spline connecting shaft, and the two rollers have rolling friction with the spline connecting shaft, so as to achieve axial position adjustment of the spline connecting shaft when it rotates.

[0007] Furthermore, the connecting disk includes: a driving disk and a driven disk; the driving disk is connected to the spline connecting shaft through a connecting flange, and the driven disk is fixed on the wheel hub of the tire device; the driving disk and the driven disk are Q235 material disc-type ratchet structures, providing unidirectional driving force.

[0008] Furthermore, the moving device includes: a servo motor, an elastic coupling, a ball screw, and a nut; the servo motor is fixed on a motor seat, connected to the ball screw through an elastic coupling, the nut cooperates with the ball screw spiral pair, and the nut is fixed in the nut mounting hole of the rolling fork.

[0009] Furthermore, the U-shaped frame of the rolling fork is a U-shaped structure made of Q235 material, which is symmetrically installed on both sides of the axis of the spline connecting shaft, providing a centrally symmetrical thrust to prevent unilateral drive from generating radial force on the spline connecting shaft and affecting the normal operation of the ball spline.

[0010] Furthermore, the tire device includes: a tire assembly, a buffer arm; the buffer arm adopts a hydraulic buffering method, the top is a fixed end, the bottom is a telescopic end, the top is processed with a flange disc with four through holes, the bottom is processed with a connecting shaft hole, and is fixedly installed on the test frame by bolt connection; the tire support shaft of the tire assembly is installed in the connecting shaft hole of the buffer arm, and the driven plate of the connecting plate is fixed on the wheel hub of the tire assembly by bolts.

[0011] The beneficial effects of implementing the mechanically controlled automatic detachable acceleration device of the present invention are:

[0012] (1) The rolling fork is modularly designed, with two rollers symmetrically distributed on both sides of the axis. When the spline connecting shaft is pushed to axially displace, the rollers and the spline connecting shaft are in rolling friction, which reduces the friction coefficient and resistance, thereby reducing the wear on the spline connecting shaft. It is highly practical and easy to operate.

[0013] (2) The active disk and the driven disk of the connecting disk realize unidirectional torque transmission through a ratchet-like structure, and there is no relative rotation in the connected state, thereby avoiding damage to the connecting disk caused by sliding friction and realizing precise control of the rotation speed of the driven disk. The structural design is safe and reliable, and repair and maintenance are convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : A front view of a mechanically controlled automatically detachable acceleration device in a connected state according to the present invention;

[0015] Figure 2 : A front view of a mechanically controlled automatic detachable acceleration device in a detached state according to the present invention;

[0016] Figure 3 : A front view of a rolling fork of a mechanically controlled automatic detachable acceleration device according to the present invention;

[0017] Figure 4 : A cross-sectional view of a rolling fork of a mechanically controlled automatic detachable acceleration device of the present invention;

[0018] Figure 5 : A three-dimensional diagram of a mechanically controlled automatically detachable acceleration device connection disk of the present invention;

[0019] Figure 6 : A three-dimensional diagram of a mechanically controlled tire device capable of automatically separating an accelerating device according to the present invention;

[0020] In the figure: 1-driving motor, 2-coupling, 3-seat bearing, 4-ball spline shaft, 5-spline connecting shaft, 6-moving device, 7-rolling fork, 8-connecting plate, 9-tire device, 71-U-shaped frame, 72-roller, 73-bearing, 74-small round nut, 75-roller shaft, 76-nut mounting hole, 81-active plate, 82-driven plate, 91-tire assembly, 92-buffer support arm. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] like Figure 1 , 2, 3, 4, 5, and 6, a mechanically controlled automatically detachable acceleration device comprises: a driving motor 1, a coupling 2, a seat bearing 3, a ball spline shaft 4, a spline connecting shaft 5, a moving device 6, a rolling fork 7, a connecting plate 8, and a tire device 9; the driving motor 1 is fixed on a motor seat, the output shaft of the driving motor 1 is connected to the ball spline shaft 4 through the coupling 2, the ball spline shaft 4 is supported by the seat bearing 3, and is radially and axially positioned by a set screw, the spline connecting shaft 5 is matched with the ball spline shaft 4 to transmit torque At the same time, axial relative sliding is realized. The moving device 6 is fixed on the mounting seat and is fastened to the nut installed on the rolling fork 7 through a ball screw. The roller of the rolling fork 7 is installed in the two positioning shoulders of the spline connecting shaft 5. One end of the connecting plate 8 is connected to the spline connecting shaft 5 through a connecting flange, and the other end of the connecting plate 8 is connected to the tire device 9; the rolling fork 7 includes: a U-shaped frame 71, a roller 72, a bearing 73, a small round nut 74, a roller shaft 75, and a nut mounting hole 76; the rolling fork 7 is a centrally symmetrical structure, and the nut mounting hole The hole 76 is located in the middle position just below the U-shaped frame 71. The inner ring of the bearing 73 is mounted on the roller shaft 75 and axially positioned through the small round nut 74 and the shaft shoulder. The outer ring is fixed to the roller 72 by thermal assembly. The roller shaft 75 is mounted on the U-shaped frame 71 in a counter-parting manner through the shaft hole, and axially positioned through the shaft retaining ring to form a rolling fork structure. The two rollers 72 are centrally symmetrically distributed on both sides of the axis of the spline connecting shaft 5. The rollers 72 are in tangential contact with the positioning shaft shoulders of the spline connecting shaft 5. The two rollers 72 and the spline connecting shaft 5 are rolling forks. Dynamic friction is used to adjust the axial position of the spline connecting shaft 5 when it rotates; the connecting disk 8 includes: an active disk 81 and a driven disk 82; the active disk 81 is connected to the spline connecting shaft 5 through a connecting flange, and the driven disk 82 is fixed to the hub of the tire device 9, and the tire support shaft of the tire assembly 91 is installed in the connecting shaft hole of the buffer support arm 92, and the driven disk 82 of the connecting disk 8 is fixed to the hub of the tire assembly 91 by bolts; the active disk 81 and the driven disk 82 are Q235 material disc-type ratchet structures, which provide unidirectional driving force.

[0023] like Figure 1 , 2, 3, 4, 5, and 6, a mechanically controlled automatically detachable acceleration device works in the following manner: when the tire is accelerated, the servo motor of the moving device 6 is started, pushing the nut forward, thereby driving the rolling fork 7 forward, and the roller 72 of the rolling fork 7 is in tangential contact with the positioning shoulder of the spline connecting shaft 5, and the two rollers 72 and the spline connecting shaft 5 are in rolling friction, so as to adjust the axial position of the spline connecting shaft 5, realize the connection between the active disk 81 and the driven disk 82, and the servo motor of the moving device 6 is turned off; start The driving motor 1 transmits the torque to the ball spline shaft 4 through the coupling 2, and the ball spline shaft 4 transmits the torque to the spline connecting shaft 5 through the ball spline, and the spline connecting shaft 5 drives the active disk 81 to rotate, thereby transmitting power to the tire device 9; after the acceleration is completed, the servo motor of the moving device 6 is started to reverse, the spline connecting shaft 5 is pulled back, and the driven disk 82 of the tire device 9 is automatically separated from the active disk 81, thereby realizing the acceleration simulation experiment of the tire device 9 to prevent damage to the transmission system.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mechanically controlled automatically detachable acceleration device, characterized in that: include: A driving motor (1), a coupling (2), a seat bearing (3), a ball spline shaft (4), a spline connecting shaft (5), a moving device (6), a rolling fork (7), a connecting plate (8), and a tire device (9); the driving motor (1) is fixed on a motor seat, the output shaft of the driving motor (1) is connected to the ball spline shaft (4) via the coupling (2), the ball spline shaft (4) is supported by the seat bearing (3), and is radially and axially positioned by a set screw, the spline connecting shaft (5) is cooperatively connected to the ball spline shaft (4), and axial relative sliding is achieved while transmitting torque, and the moving device (6) is fixed to a mounting seat via The ball screw is tightly connected to a nut mounted on the rolling fork (7); the roller of the rolling fork (7) is mounted in two positioning shoulders of the spline connecting shaft (5); one end of the connecting plate (8) is connected to the spline connecting shaft (5) via a connecting flange; the other end of the connecting plate (8) is connected to the tire device (9); the moving device (6) comprises: a servo motor, an elastic coupling, a ball screw, and a nut; the servo motor is fixed on a motor seat and connected to the ball screw via an elastic coupling; the nut cooperates with the ball screw screw pair; the nut is fixed in a nut mounting hole (76) of the rolling fork (7); the rolling fork ( 7) comprises: a U-shaped frame (71), a roller (72), a bearing (73), a small round nut (74), a roller shaft (75), and a nut mounting hole (76); the rolling fork (7) is a centrally symmetrical structure, the nut mounting hole (76) is located in the middle position directly below the U-shaped frame (71), the inner ring of the bearing (73) is mounted on the roller shaft (75) and is axially positioned by the small round nut (74) and the shaft shoulder, the outer ring is fixed to the roller (72) by heat-fitting, the roller shaft (75) is mounted on the U-shaped frame (71) in a counter-parting manner through the shaft hole, and is axially positioned by the shaft retaining ring, thereby forming a rolling fork structure; the two rollers (72) are centrally The two rollers (72) are symmetrically distributed on both sides of the axis of the spline connection shaft (5); the rollers (72) are in tangential contact with the positioning shoulder of the spline connection shaft (5); the two rollers (72) and the spline connection shaft (5) are in rolling friction, so that the axial position of the spline connection shaft (5) can be adjusted when the spline connection shaft (5) rotates; the connecting disk (8) comprises: a driving disk (81) and a driven disk (82); the driving disk (81) is connected to the spline connection shaft (5) through a connecting flange, and the driven disk (82) is fixed on the wheel hub of the tire device (9); the driving disk (81) and the driven disk (82) are Q235 material disc-shaped ratchet-like structures, providing a unidirectional driving force;The U-shaped frame (71) of the rolling fork (7) is a U-shaped structure made of Q235 material, symmetrically mounted on both sides of the axis of the spline connecting shaft (5), and provides a centrally symmetrical thrust to prevent the single-side drive from generating a radial force on the spline connecting shaft (5) and affecting the normal operation of the ball spline; the tire device (9) comprises: a tire assembly (91), a buffer support arm (92); the buffer support arm (92) adopts a hydraulic buffering method, the top is a fixed end, the bottom is a telescopic end, the top is processed with a flange disc with four through holes, the bottom is processed with a coupling hole, and is fixedly mounted on the test frame by bolt connection; the tire support shaft of the tire assembly (91) is installed in the coupling hole of the buffer support arm (92), and the driven disc (82) of the connecting disc (8) is fixed to the wheel hub of the tire assembly (91) by bolts. ;

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