An electronic steering mechanism

Abstract

The present invention relates to the field of automated mechanical equipment, and in particular to the structural design of an industrial vehicle steering control device. The present invention is realized by the following technical scheme: an electronic steering mechanism, comprising a rotating shaft assembly and a steering seat, wherein a torsion spring is provided on the steering seat, and the torsion spring comprises two torsion spring extension ends; the rotating shaft assembly comprises a push rod, and the two torsion spring extension ends are located on both sides of the push rod, and the rotating shaft assembly is connected to a potentiometer. The purpose of the present invention is to provide an electronic steering mechanism, realize differential steering, realize that the vehicle can be steered more easily, and enhance the return to neutrality of the entire handle.

Description

Technical Field

[0001] The invention relates to the field of automated mechanical equipment, and in particular to the structural design of a steering control device for an industrial vehicle. Background Art

[0002] Industrial vehicles refer to power-driven motor vehicles used to transport, push, pull, lift, stack or stack various goods. Common industrial vehicles include forklifts, side forklifts, tractors, transporters, stackers and so on.

[0003] Industrial vehicles need to use a handle to correct the vehicle's route. For example, Chinese patent document No. CN201910257211.6 discloses a steering handle and a storage vehicle including the steering handle, and the user can correct the direction of the vehicle's route by operating the steering handle.

[0004] However, this technical solution still has certain technical defects. On the one hand, when the vehicle needs to turn at a large angle, the handle also needs to turn at the same angle, and the large-range angle change operation affects the convenience of the driver's operation. On the other hand, the operating feel of the handle when returning to the center is not good, which affects the stability of the vehicle when it is moving straight. Summary of the invention

[0005] The purpose of the present invention is to provide an electronic steering mechanism to realize differential steering, enable the vehicle to steer more easily, and enhance the return to neutrality of the entire handle.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: an electronic steering mechanism, comprising a rotating shaft assembly and a steering seat, wherein the steering seat is provided with a torsion spring, and the torsion spring comprises two torsion spring extension ends; the rotating shaft assembly comprises a push rod, and the two torsion spring extension ends are located on both sides of the push rod, and the rotating shaft assembly is connected to a potentiometer.

[0007] As a preferred embodiment of the present invention, the rotating shaft assembly includes a rotating shaft and a transverse connecting piece, the push rod is connected to the transverse connecting piece, and the potentiometer is connected to the lower end of the rotating shaft.

[0008] As a preferred embodiment of the present invention, the steering seat comprises a main seat portion and an overhanging piece connected to the main seat portion, and the overhanging piece is provided with two side limit columns for limiting the rotational travel of the push rod.

[0009] As a preferred embodiment of the present invention, when the handle is centered, the horizontal distance between the two extended ends of the torsion spring is equal to the outer diameter of the push rod.

[0010] As a preferred embodiment of the present invention, the push rod includes a bolt and a sleeve sleeved on the outside of the bolt, and the protruding piece is provided with an auxiliary limiting groove, and the groove length of the auxiliary limiting groove is less than the distance between the two side limiting columns.

[0011] As a preferred embodiment of the present invention, a middle limit column is provided on the protruding piece, and the middle limit column is located in the middle position of the two side limit columns. When the handle is centered, the two protruding ends of the torsion springs abut against the two sides of the middle limit column.

[0012] As a preferred embodiment of the present invention, it also includes a centering device for determining the relative position of the rotating shaft assembly with respect to the winning pillar in the horizontal direction.

[0013] As a preferred embodiment of the present invention, the centering device includes an outer body connected to the rotating shaft assembly, a ball head and an elastic body connected between the outer body and the ball head, and a positioning groove matching the ball head is provided on the middle limiting column.

[0014] As a preferred embodiment of the present invention, the elastic body extends in the vertical direction, and the elastic body comprises two spacers extending in the horizontal direction and a spring located between the two spacers.

[0015] As a preferred embodiment of the present invention, the outer body is threadedly connected to the transverse connecting piece.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. Through the controller, the rotation angle of the shaft assembly can be proportional to the actual rotation angle of the steering wheel, so that the shaft can rotate within a suitable angle range, and the steering wheel can rotate within any required angle range.

[0018] 2. By detecting the rotation angle of the potentiometer, the vehicle speed can be reduced when turning at a large angle, thereby improving the safety of turning.

[0019] 3. The push rod rotates synchronously driven by the rotating shaft, and the two extended ends of the torsion springs are on both sides of it, contacting it, producing a damping feel.

[0020] 4. The horizontal distance between the two extended ends of the torsion springs is exactly the outer diameter of the nylon jacket, ensuring that the operating handle or steering wheel will not shake left and right when the shaft assembly is in the middle position.

[0021] 5. The two side limit posts limit the maximum rotation position of the push rod.

[0022] 6. The setting of the centering device allows the operator to feel a vibration during the return to center process, and the vibration sensation can be adjusted by the installation depth of the centering device relative to the shaft assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of embodiment 1;

[0024] Figure 2 yes Figure 1 Schematic diagram behind the hidden steering seat;

[0025] Figure 3 It is a schematic diagram of the steering seat;

[0026] Figure 4 is a side cross-sectional view of the centering device.

[0027] In the figure:

[0028] 1. Rotating shaft assembly, 11. Rotating shaft, 12. Horizontal connecting piece, 13. Push rod, 2. Torsion spring, 21. Extended end of torsion spring, 3. Steering seat, 31. Main seat, 32. Extended piece, 33. Auxiliary limiting groove, 34. Side limiting column, 4. Potentiometer, 5. Potentiometer connecting plate, 6. Middle limiting column, 61. Positioning groove, 7. Centering device, 71. Outer body, 72. Elastic member, 721. Spacer, 722. Spring, 73. Ball head. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0031] Embodiment 1, as Figure 1 and Figure 2 As shown, it includes a rotating shaft assembly 1, and the rotating shaft assembly 1 includes a rotating shaft 11. The upper end of the rotating shaft 11 can be connected to a component such as a steering wheel. When the steering wheel rotates, the rotating shaft 11 is directly driven to rotate. The lower end of the rotating shaft 11 is connected to a potentiometer connecting plate 5 and a potentiometer 4, and the rotation of the rotating shaft 11 drives the rotation of the potentiometer 4. In this way, through the controller, it can be achieved that the rotation angle of the rotating shaft assembly 1 has a certain proportional relationship with the actual rotation angle of the steering wheel, that is, the rotating shaft 11 can be rotated within a suitable angle range, and this rotation angle range is in line with ergonomics, and the steering wheel can be rotated within any required angle range. In addition, by detecting the rotation angle of the potentiometer 4, the vehicle speed can be reduced when turning at a large angle, thereby improving the safety during steering.

[0032] like Figure 1 , Figure 2 and Figure 3As shown, it also includes a rotating seat 3, which is connected to the body of the vehicle. Unlike the rotating shaft assembly 1, the rotating seat 3 can be regarded as a stationary part. Figure 3 Therefore, it includes a main seat portion 31 and an extension piece 32. A torsion spring 2 is sleeved on the main seat portion 31. The torsion spring 2 includes two torsion spring extension ends 12 extending outward. The rotating shaft assembly 1 includes a horizontal connecting piece 12 extending in the horizontal direction, and a push rod 13 is connected to the horizontal connecting piece 12. The push rod 13 extends in the vertical direction and includes a screw therein and a nylon jacket sleeved on the outer periphery of the screw.

[0033] When the user operates the steering wheel to turn, the push rod 13 rotates synchronously driven by the rotating shaft 11, and the two torsion spring extensions 21 on both sides thereof contact with it, generating a damping feeling. When the steering is finished and the vehicle needs to be straightened, the torsion force of the torsion spring 2 also facilitates the push rod 13 to return to the center position.

[0034] In this case, when the handle is in the center position, the distance between the two torsion spring extension ends 12 in the horizontal direction is exactly the outer diameter of the nylon jacket. Specifically, at this time, the two torsion spring extension ends 12 are in close contact with the push rod 13 without gap, and at the same time, the two torsion spring extension ends 12 are in close contact with both sides of the center support 6 without gap. In this way, it can be ensured that the operating handle or steering wheel will not shake left and right when the rotating shaft assembly 1 is in the center position, that is, the centering is good.

[0035] In this case, there is also a limit on the rotation limit position of the rotating shaft assembly 1, specifically, as Figure 1 and Figure 3 As shown, when the shaft assembly 1 rotates, the push rod 13 rotates, and when moving left and right, it will hit the side limit posts 34 at the left and right extreme positions. The two side limit posts 34 limit the maximum rotation position of the push rod 13.

[0036] In addition, there is a second limit design. An auxiliary limit groove 33 is provided on the protruding piece 32. In the normal state, the push rod 13 will not extend into the auxiliary limit groove 33. However, in some technical solutions, since the push rod 13 is threadedly connected to the cross-connecting piece 12, it can adjust its downward extension length by rotation. When the push rod 13 extends downward for a long time, it extends into the auxiliary limit groove 33. At this time, the maximum angle of the shaft assembly 1 operated by the user through the handle is limited by the auxiliary limit groove 33. Since the slot length of the auxiliary limit groove 33 must be less than the distance between the two side limit columns 34, a greater degree of angle limitation can be achieved.

[0037] In addition, in order to further enhance the stability and sense of the return to center state, thereby helping to enhance the stability of the vehicle's straight forward state. The present case includes a centering device 7, specifically, Figure 2 and Figure 4As shown, a groove is made in the vertical direction on the cross-connecting piece 12, and an outer body 71 is installed. An elastic member 72 is provided in the outer body 71, and the elastic member 72 includes two spacers 721 and a spring 722 between the two spacers 721, and a ball head 73 is installed below the lower spacer 721. A positioning groove 61 is provided on the middle bid pillar 6. When the shaft assembly 1 rotates left and right, the ball head 73 is not in the positioning groove 61, and when it reaches the preset center position, the upper half of the ball head 73 is in the outer body 71, and the lower half is in the positioning groove 61, thereby providing the user with a clear feedback feel. Make the handle or steering wheel have an obvious return to center feeling. Under such a scheme, the return to center process allows the operator to feel a vibration, and the vibration feeling can be adjusted by the installation depth of the centering device 7 relative to the shaft assembly 1.

Claims

1. An electronic steering mechanism, comprising a rotating shaft assembly (1), characterized in that: The invention also comprises a steering seat (3), wherein a torsion spring (2) is provided on the steering seat (3), wherein the torsion spring (2) comprises two torsion spring extension ends (21); the rotating shaft assembly (1) comprises a push rod (13), wherein the two torsion spring extension ends (21) are located on both sides of the push rod (13); the rotating shaft assembly (1) is connected to a potentiometer (4), and a controller is used to realize that the actual rotation angle of the steering wheel is proportional to the rotation angle of the rotating shaft assembly (1); the rotating shaft assembly (1) comprises a rotating shaft (11) and a cross-connecting piece ( 12), the push rod (13) is connected to the cross-connecting piece (12), the lower end of the rotating shaft (11) is connected to the potentiometer (4), the steering seat (3) comprises a main seat portion (31) and an overhanging piece (32) connected to the main seat portion (31), the overhanging piece (32) is provided with two side limit columns (34) for limiting the rotation stroke of the push rod (13), the push rod (13) comprises a bolt and a sleeve sleeved on the outer side of the bolt, and the overhanging piece (32) is provided with an auxiliary limit groove (33), the slot length of the auxiliary limit groove (33) is less than the distance between the two side limit columns (34), the push rod (13) is connected to the cross-connecting piece (12) by a thread, and the downward extension length is adjusted by rotating the push rod (13), and a middle limit column (6) is provided on the extension piece (32), and the middle limit column (6) is located in the middle of the two side limit columns (34). When the handle is centered, the two torsion spring extension ends (21) abut against the middle limit column (6). Both sides also include a centering device (7) for determining the relative position of the rotating shaft assembly (1) relative to the middle limiting column (6) in the horizontal direction, the centering device (7) including an outer body (71) connected to the rotating shaft assembly (1), a ball head (73) and an elastic body (72) connected between the outer body (71) and the ball head (73), the middle limiting column (6) is provided with a positioning groove (61) matching the ball head (73), and the outer body (71) is threadedly connected to the cross-connecting piece (12).

2. An electronic steering mechanism according to claim 1, characterized in that: When the handle is in the center position, the horizontal distance between the two torsion spring protruding ends (21) is equal to the outer diameter of the push rod (13).

3. The electronic steering mechanism according to claim 1, characterized in that: The elastic body (72) extends in a vertical direction, and comprises two spacers (721) extending in a horizontal direction and a spring (722) located between the two spacers (721).

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