A steering gear

Abstract

The present invention provides a steering gear, comprising an input shaft and a steering gear housing, wherein the steering gear housing comprises a first housing and a second housing, wherein the first housing and the second housing are fixed to each other at an angle, and the input shaft is inserted into the first housing, wherein the steering gear further comprises a mounting base; a mounting portion for sleeve-connecting the mounting base is provided on the second housing, and a first stopper is provided on the mounting portion; and a second stopper is provided on the mounting base to clamp the first stopper, so as to prevent the second housing and the mounting base from rotating relative to each other in the circumferential direction. The present invention is implemented to change the existing steering gear structure to meet the requirements of different arrangement angles of the input shaft on the steering gear.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a steering gear. Background Art

[0002] The steering gear converts the rotation of the steering wheel into the swing of the steering rocker arm and amplifies the torque according to a certain transmission ratio. The function of the steering gear is to increase torque, reduce speed and change the direction of movement.

[0003] The traditional steering gear is generally installed and fixed on the front subframe, with its output end fixed on the steering knuckle at the wheel end and its input end splined to the end of the intermediate shaft of the steering column. The driver changes the steering wheel angle to transmit the steering intention to the steering column, and the steering column transmits the rotational torque to the steering gear. The steering gear changes the rotational torque into telescopic torque and transmits it to the wheels, ultimately achieving the steering of the vehicle.

[0004] like Figure 1 As shown, in the existing steering gear, the input shaft 1 forms a certain angle with the mounting base 2 fixed to the outside of the steering gear housing 5. Since the specific value of the angle is affected by ergonomic requirements and steering column torque fluctuation requirements, when the purpose of the vehicle changes, the steering gear needs to be redesigned, molded and manufactured according to different angle requirements, which not only wastes manpower and material resources, but also increases management costs. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a steering gear, change the existing steering gear structure to realize the steering gear angle fixing function, so as to meet the requirements of different vehicle types and different ergonomics for different arrangement angles of the input shaft on the steering gear, thereby reducing the design, production and management costs of the steering gear.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a steering gear, including an input shaft and a steering gear housing, wherein the steering gear housing includes a first housing and a second housing, wherein the first housing and the second housing are fixed to each other at an angle, the input shaft is inserted into the first housing, and the steering gear further includes a mounting base; wherein,

[0007] The second shell is provided with a mounting portion for sleeve-connecting the mounting base, and the mounting portion is provided with a first limiting member;

[0008] The mounting base is provided with a second limiting member clamped with the first limiting member to prevent the second shell and the mounting base from rotating relative to each other in the circumferential direction.

[0009] The first limiting member and the second limiting member are arcs with the same radius, and the sum of the central angles of the first limiting member and the second limiting member is 360 degrees.

[0010] There are at least two first limiting members, and each of the first limiting members is evenly distributed on the circle where it is located and has the same arc length.

[0011] There are two first limiting members, and there is one second limiting member, and the second limiting member is clamped between the two first limiting members.

[0012] Wherein, it also includes a key pin, on which a bayonet is provided, and the bayonet is clamped between the first limiting member and the second limiting member to prevent the second shell and the mounting base from rotating relative to each other in the circumferential direction.

[0013] The first position-limiting member, the second position-limiting member and the bayonet are arcs with the same radius, and the sum of the central angles of the first position-limiting member, the second position-limiting member and the bayonet is 360 degrees.

[0014] There is one first limiting member, one second limiting member, and two locking pins.

[0015] There are two first position-limiting members, two second position-limiting members, and the two second position-limiting members are respectively located on both sides of one of the first position-limiting members; and there are four latching pins.

[0016] There is one first limiting member, and two second limiting members, and three assembly spaces are formed between the first limiting member and the two second limiting members; there are two bayonet pins, and the two bayonet pins are clamped in two of the assembly spaces.

[0017] There are two mounting bases, two mounting parts, and two key pins. Each mounting part is provided with a flange. When the mounting base is sleeved on one of the mounting parts, the flange is used to limit the movement of the mounting base toward the other mounting part.

[0018] It also includes two blocking covers for limiting the movement of the key pin in a direction away from the flange, each of the blocking covers is provided with a fixing portion, and one end of each mounting base away from the flange is provided with a mounting position for mounting the fixing portion.

[0019] Implementing the embodiments of the present invention has the following beneficial effects:

[0020] Compared with the traditional steering gear, the steering gear in the embodiment of the present invention separates the original steering gear mounting base from the steering gear, and adds a key pin for adjusting the assembly angle and a threaded plug for locking, thereby realizing the steering gear angle adjustment function to meet the requirements of different vehicle types and different ergonomics for different layout angles of the steering gear input shaft, thereby reducing the design, production and management costs of the steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the steering gear after assembly and forming in the prior art;

[0023] Figure 2 It is a schematic diagram of a partial three-dimensional structure of a steering gear after assembly and forming provided in an embodiment of the present invention;

[0024] Figure 3 for Figure 2 Sectional view along the AA direction;

[0025] Figure 4 It is a schematic diagram of a partial three-dimensional structure of a key pin, a mounting base and a plug cover in a steering gear provided in an embodiment of the present invention before assembly and molding;

[0026] Figure 5 for Figure 4 A schematic diagram of a three-dimensional structure of a key pin;

[0027] Figure 6 for Figure 5 A cross-sectional view of the key pin and the mounting base after assembly;

[0028] Figure 7 for Figure 4 A schematic diagram of a three-dimensional structure of another key pin;

[0029] Figure 8 for Figure 7 A cross-sectional view of the key pin and the mounting base after assembly;

[0030] Fig. 9 for Figure 4 A schematic diagram of a three-dimensional structure of another key pin;

[0031] Fig.10 for Fig. 9 A cross-sectional view of the key pin and the mounting base after assembly;

[0032] In the figure: 1-input shaft, 2-mounting base, 21-second limit piece, 22-mounting position, 3-key pin, 31-bayonet pin, 4-blocking cover, 41-fixing part, 5-steering gear housing, 51-first housing, 52-second housing, 521-mounting part, 5211-first limit piece, 5212-flange. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are for explaining and understanding the present invention, but not for limiting the scope of protection of the present invention.

[0035] like Figure 2 and Figure 3 As shown, a steering gear is provided in an embodiment of the present invention, comprising an input shaft 1 and a steering gear housing 5, wherein the steering gear housing 5 comprises a first housing 51 and a second housing 52, wherein the first housing 51 and the second housing 52 are fixed to each other at an angle, and the input shaft 1 is inserted into the first housing 51;

[0036] The steering gear also includes a mounting base 2; wherein,

[0037] The second housing 52 is provided with a mounting portion 521 for sleeve-mounting the mounting base 2, and the mounting portion 521 is provided with a first position-limiting member 5211;

[0038] The mounting base 2 is provided with a second limit piece 21 which is clamped with the first limit piece 5211 to prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction, so that the angle between the mounting base 2 and the input shaft 1 can be changed, thereby meeting the requirements of different vehicle types and different ergonomics for different arrangement angles of the input shaft 1 on the steering gear.

[0039] In the embodiment of the present invention, the number of the first limit members 5211 and the second limit members 21 can be freely combined, and the assembly method can be adjusted according to the number, as long as the second shell 52 and the mounting base 2 can be prevented from rotating relative to each other in the circumferential direction.

[0040] In one embodiment, the first stopper 5211 and the second stopper 21 are both one, and the first stopper 5211 and the second stopper 21 are arcs with the same radius, and the sum of the central angles of the first stopper 5211 and the second stopper 21 is 360 degrees. The first stopper 5211 can be equally divided into multiple segments, that is, equally divided into two or more segments, in which case each first stopper 5211 is evenly distributed on the circle where it is located and has the same arc length; or the first stopper 5211 can also be divided into multiple segments with different arc lengths.

[0041] In another embodiment, there are two first limit members 5211 and one second limit member 21, and the second limit member 21 is clamped between the two first limit members 5211. There may be more than two first limit members 5211, and the width of the second limit member 21 is reduced accordingly, as long as the second limit member 21 can be clamped between two of the first limit members 5211 to prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction.

[0042] In the embodiment of the present invention, in order to overcome the above-mentioned rough limitation of the first limiting member 5211 and the second limiting member 21 to prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction, a limiting block (such as a pin, a clamping strip, etc.) with a small volume and flexible insertion and removal is used between the first limiting member 5211 and the second limiting member 21 to further adjust the angle and prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction. Figure 4 As shown, the steering gear further includes a key pin 3, on which a latch pin 31 is disposed. The latch pin 31 is disposed between the first limiting member 5211 and the second limiting member 21 to prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction.

[0043] At this time, the number of the first stopper 5211, the second stopper 21 and the bayonet 31 can be freely combined, and the assembly method can adopt different methods according to the different numbers, so as to prevent the second housing 52 and the mounting base 2 from rotating relative to each other in the circumferential direction. It can be understood that by flexibly adjusting the number and width of the bayonet 31, the angle change between the mounting base 2 and the input shaft 1 can be further satisfied, and the requirements of different vehicle types and different ergonomics for different arrangement angles of the input shaft 1 on the steering gear can be met.

[0044] In one embodiment, there is one first limiting member 5211 and two second limiting members 21, and three assembly spaces are formed between the first limiting member 5211 and the two second limiting members 21; there are two locking pins 31, and the two locking pins 31 are held in two of the assembly spaces.

[0045] In another embodiment, the first limit member 5211, the second limit member 21 and the bayonet 31 are all one, in which case the first limit member 5211, the second limit member 21 and the bayonet 31 are arcs with the same radius, and the sum of the central angles corresponding to the first limit member 5211, the second limit member 21 and the bayonet 31 is 360 degrees.

[0046] In another embodiment, the first limit member 5211 and the second limit member 21 are each one, and there are two latch pins 31. In this case, the first limit member 5211, the second limit member 21 and the two latch pins 31 are all arcs with the same radius, and the sum of the central angles corresponding to the first limit member 5211, the second limit member 21 and the two latch pins 31 is 360 degrees.

[0047] In another embodiment, there are two first limit members 5211, two second limit members 21, and the two second limit members 51 are respectively located on both sides of one of the first limit members 5211; there are four bayonet pins 31; at this time, the two first limit members 5211, the two second limit members 21 and the four bayonet pins 31 are all arcs with the same radius, and the sum of the central angles corresponding to the two first limit members 5211, the two second limit members 21 and the four bayonet pins 31 is 360 degrees.

[0048] For example, the two first stoppers 5211 are both splines with a 60-degree arc angle; the two second stoppers 21 are both splines with a 60-degree arc angle; the four latches 31 are all arc-shaped protrusions with a 30-degree arc angle, such as Figure 5 As shown; after the two mounting bases 2 are fixed, an angle is formed between the two mounting bases 2 and the input shaft 1, as shown Figure 6 As shown;

[0049] For another example, the two first stoppers 5211 are both splines with a 60-degree arc angle; the two second stoppers 21 are both splines with a 60-degree arc angle, and two of the four locking pins 31 are arc-shaped protrusions with a 20-degree arc angle, and the other two are arc-shaped protrusions with a 40-degree arc angle. Figure 7 As shown, after the two mounting bases 2 are fixed, another angle is formed between the two mounting bases 2 and the input shaft 1, as shown in FIG. Figure 8 As shown;

[0050] For another example, the two first stoppers 5211 are both splines with a 60-degree arc angle; the two second stoppers 21 are both splines with a 60-degree arc angle, and two of the four locking pins 31 are arc-shaped protrusions with a 10-degree arc angle, and the other two are arc-shaped protrusions with a 50-degree arc angle. Fig. 9 As shown, after the two mounting bases 2 are fixed, another angle is formed between the two mounting bases 2 and the input shaft 1, as shown in FIG. Fig.10 shown.

[0051] In the embodiment of the present invention, the steering gear will have two mounting bases 2, so there will also be two second shells 52, and two mounting portions 521 are provided on the two second shells 52, and are equipped with two key pins 3; at this time, each mounting portion 521 is provided with a flange 5212, and when the mounting base 2 is sleeved on one of the mounting portions 521, the flange 5212 is used to limit the movement of the mounting base 2 in the direction of the other mounting portion 521.

[0052] In an embodiment of the present invention, the steering gear also includes two blocking covers 4 for limiting the movement of the key pin 3 in a direction away from the flange 5212. Each blocking cover 4 is provided with a fixing portion 41, and each mounting base 2 is provided with an installation position 22 for installing the fixing portion 41 at one end away from the flange 5212.

[0053] In one embodiment, the fixing portions 41 of the two plugging covers 4 are both internal threads, and the mounting positions 22 of the two mounting bases 2 are both external threads; wherein the two plugging covers 4 form a threaded connection with the two mounting bases 2, so that each mounting base 2 and its assembled key pin 3 are tightly clamped and fixed on the corresponding assembly portion 521.

[0054] Implementing the embodiments of the present invention has the following beneficial effects:

[0055] Compared with the traditional steering gear, the steering gear in the embodiment of the present invention separates the original steering gear mounting base from the steering gear, and adds a key pin for adjusting the assembly angle and a threaded plug for locking, thereby realizing the steering gear angle adjustment function to meet the requirements of different vehicle types and different ergonomics for different layout angles of the steering gear input shaft, thereby reducing the design, production and management costs of the steering gear.

[0056] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A steering gear, comprising an input shaft and a steering gear housing, wherein the steering gear housing comprises a first housing and a second housing, wherein the first housing and the second housing are fixed to each other at an angle, and the input shaft is inserted into the first housing, wherein: The steering gear also includes a mounting base; wherein, The second shell is provided with a mounting portion for sleeve-connecting the mounting base, and the mounting portion is provided with a first limiting member; The mounting base is provided with a second limiting member; Wherein, a limit block is provided between the first limit member and the second limit member to prevent the second shell and the mounting base from rotating relative to each other in the circumferential direction; wherein, the first limit member and the second limit member are both splines, and the limit block is an arc-shaped protrusion.

2. The steering gear according to claim 1, characterized in that: The limit block includes a key pin, and a bayonet is provided on the key pin. The bayonet is disposed between the first limit piece and the second limit piece to prevent the second shell and the mounting base from rotating relative to each other in the circumferential direction.

3. The steering gear according to claim 2, characterized in that: The first position-limiting member, the second position-limiting member and the bayonet are arcs with the same radius, and the sum of the central angles corresponding to the first position-limiting member, the second position-limiting member and the bayonet is 360 degrees.

4. The steering gear according to claim 3, characterized in that: The number of the first limiting member is one, the number of the second limiting member is one, and the number of the locking pins is two.

5. The steering gear according to claim 3, characterized in that: There are two first limiting members, two second limiting members, and the two second limiting members are respectively located on both sides of one of the first limiting members; there are four locking pins.

6. The steering gear according to claim 2, characterized in that: There is one first limiting member, and two second limiting members, and three assembly spaces are formed between the first limiting member and the two second limiting members; there are two bayonet pins, and the two bayonet pins are held in two of the assembly spaces.

7. The steering gear according to claim 2, characterized in that: There are two mounting bases, two mounting parts, and two key pins. Each mounting part is provided with a flange. When the mounting base is sleeved on one of the mounting parts, the flange is used to limit the movement of the mounting base toward the other mounting part.

8. The steering gear according to claim 7, characterized in that: It also includes two blocking covers for limiting the movement of the key pin in a direction away from the flange, each of the blocking covers is provided with a fixing portion, and one end of each mounting base away from the flange is provided with a mounting position for mounting the fixing portion.

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