On-off device of steering gear

Abstract

The utility model provides an on-off device of a steering gear, which comprises a shell, a left rack and a right rack which are inserted into the shell, a hook-headed guide post arranged on the right rack, a first mounting groove and a second mounting groove body arranged on the left rack, a movable clamping component which is correspondingly matched with the hook-headed guide post arranged on the first mounting groove, and a second clamping component which is arranged on the second mounting groove and is correspondingly matched with the hook-headed guide post arranged on the second mounting groove body. And a group of electric expansion pieces correspondingly matched with the movable clamping assemblies are mounted on each second mounting groove body. The device is simple in structure and convenient to produce, the situation that in the prior art, a hydraulic cylinder is adopted for providing power for on-off is changed, and the overall weight and size of the device are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, and specifically to a switching device for a steering gear. Background Art

[0002] The steering gear of a vehicle is used for a driver to control the steering of the vehicle. There are various forms of existing steering gears. The commonly used rack and pinion steering gear has a basic structure of a pair of meshing gears and a rack. When the steering shaft drives the pinion to rotate, the rack makes a linear motion.

[0003] The rack and pinion steering gear is widely used in the steering gear systems of small-displacement cars and new energy vehicles due to its simple and compact structure, high quality and low price. However, with the development of new energy vehicle technology, the continuous mileage of the vehicle has become the focus of consumers' attention. Therefore, how to reduce the vehicle weight and reasonably and compactly arrange the internal space of the vehicle has become a concern for automobile manufacturers. The power sources of the existing switching devices for vehicle steering gears are mostly hydraulic cylinders. For example, in the prior art, the application numbers are: 201310392179.5, 202011063108.7, etc. The use of hydraulic cylinders increases the overall weight of the steering gear and requires a large space for installing the hydraulic cylinders. This cannot meet the requirements of new energy vehicle and small new energy vehicle production. Summary of the Utility Model

[0004] The utility model is to overcome the deficiencies in the prior art and provide a switching device for a steering gear.

[0005] The present application provides the following technical solutions:

[0006] A switching device for a steering gear, which includes a housing. A left rack is inserted into one end of the housing, and a right rack is inserted into the other end of the housing. It is characterized in that: a hook head guide post extends from the insertion end of the right rack. At the end of the insertion end of the left rack, there are a first installation groove and a pair of mounting brackets. The two mounting brackets form a second installation groove body. An active clamping component corresponding to the hook head guide post is installed on the first installation groove. An electric telescopic device is installed on each mounting bracket. The end of the output shaft of the electric telescopic device is provided with a propping head corresponding to the active clamping component.

[0007] On the basis of the above technical solutions, the following further technical solutions may be available:

[0008] The described movable clamping component includes a first clamping piece and a second clamping piece which are distributed relatively. The main bodies of the first clamping piece and the second clamping piece are strip-shaped. The first clamping piece and the second clamping piece are provided with inserting strips correspondingly penetrating through the two side walls of the first installation groove. There is a margin for the first clamping piece and the second clamping piece to move along the inserting strips. On one side of the middle parts of the first clamping piece and the second clamping piece, there is a boss respectively. At the end of each boss, there is an arc-shaped groove. On the inner side of the boss, there is a semi-circular groove. After the two bosses are combined, they form a frustum shape. The two semi-circular grooves form an annular shape and a circular hole shape so as to be correspondingly matched with the hook head guiding column. An elastic ring is sleeved in the two annular semi-circular grooves. At both ends of the other side of the first clamping piece and the second clamping piece, there are correspondingly distributed conical grooves. The correspondingly distributed conical grooves form a conical supporting opening which is correspondingly matched with the supporting head. The axial direction of the electric telescopic device is coaxially distributed with the left rack and the right rack.

[0009] The described movable clamping component includes a first clamping piece and a second clamping piece which are distributed relatively. The main bodies of the first clamping piece and the second clamping piece are semi-circular. The first clamping piece and the second clamping piece are provided with inserting strips correspondingly penetrating through the two side walls of the first installation groove. There is a margin for the first clamping piece and the second clamping piece to move along the inserting strips. On one side of the middle parts of the first clamping piece and the second clamping piece, there is a boss respectively. At the end of each boss, there is an arc-shaped groove. On the inner side of the boss, there is a semi-circular groove. After the two bosses are combined, they form a frustum shape. The two semi-circular grooves form an annular shape and a circular hole shape so as to be correspondingly matched with the hook head guiding column. An elastic ring is sleeved in the two annular semi-circular grooves. At both ends of the other side of the first clamping piece and the second clamping piece, there are relatively distributed inclined chamfers. The two relatively distributed inclined chamfers on the same side form a V-shaped groove which is correspondingly matched with the supporting head. The axial direction of the output shaft of the electric telescopic device is vertically distributed with the left rack and the right rack.

[0010] The described elastic ring is a circular ring made of rubber or an open ring made of metal.

[0011] The first installation groove and the second installation groove are distributed in a cross shape at the insertion end of the left rack.

[0012] The described hook head guiding column includes a column body with a diameter smaller than that of the right rack. At the end of the column body, there is a diameter enlarged section. At the end of the diameter enlarged section, there is an annular chamfer, so as to form a conical hook head part.

[0013] Advantages of the utility model:

[0014] The structure of the utility model is simple and convenient for production. The electric output device is adopted to output and expand the movable clamping component, so that the hook head part of the hook head guiding column passes through the movable clamping component and then forms a limit fit with it, thereby realizing the on-off connection of the left and right racks, changing the prior art that uses a hydraulic cylinder to provide power for on-off, and effectively reducing the overall weight and volume of the device. Description of the drawings

[0015] Figure 1 is the structural schematic diagram of Embodiment 1 of the present utility model;

[0016] Figure 2 is the three-dimensional schematic diagram when the housing of the present utility model is removed;

[0017] Figure 3 is Figure 2 the three-dimensional exploded structural schematic diagram of;

[0018] Figure 4 is the structural schematic diagram after the housing of Embodiment 2 is removed;

[0019] Figure 5 is Figure 4 the structural schematic diagram of the movable clamping component in; Detailed implementation manners Embodiment

[0020] As Figures 1-3 shown,

[0021] An on-off device for a steering gear, which includes a housing 1. A left rack 2 is inserted into one end of the housing 1, and a right rack 3 is inserted into the other end of the housing 1. The left and right racks 2 and 3 are coaxially distributed.

[0022] A hook head guide post 4 extending coaxially is provided at the insertion end of the right rack 3. The hook head guide post 4 includes a column body 4a extending from the end of the right rack 3. The diameter of the column body 4a is smaller than that of the right rack. A diameter enlarging section 4b is provided at the end of the column body 4a, and an annular edge trimming 4c is provided at the end of the diameter enlarging section 4b to form a conical hook head part.

[0023] A first installation groove 5 is coaxially extended at the end of the insertion end of the left rack 2. The first installation groove 5 corresponds to the hook head guide post 4 so that the hook head part can be inserted therein. The first installation groove 5 includes a hook head insertion groove 5a at the bottom. On the groove wall of the hook head insertion groove 5a, extension pieces 5b are coaxially symmetrically extended, and a limiting block 5c is extended at the end of the extension piece 5b along the radial direction. The limiting block 5c, the extension piece 5b and the hook head insertion groove 5a can form two secondary groove bodies 5d distributed relatively. An arc-shaped hook head passage groove 15c is provided on the opposite inner side walls of the two limiting blocks 5c.

[0024] An movable clamping component 7 corresponding and cooperating with the hook head guide post 4 is installed on the first installation groove 5. The movable clamping component 7 includes a first clip 7a and a second clip 7b which are relatively distributed and have the same structure. The main bodies of the first clip 7a and the second clip 7b are strip-shaped structures, and their axial directions are perpendicular to the axial directions of the left and right racks 2 and 3 respectively. The first clip 7a and the second clip 7b are respectively distributed in the two secondary groove bodies 5d.

[0025] Insertion strips 7h corresponding to those passed through the extension piece 5b are provided on the outer side walls of the first clamp 7a and the second clamp 7b. The first clamp 7a and the second clamp 7b have a margin for movement along the insertion strips 7h. The axial direction of the insertion strips 7h is perpendicular to the axial direction of the left and right racks 2 and 3.

[0026] A semicircular boss 7c is extended along the axial direction of the left and right racks 2 and 3 on one side of the middle part of the first clamp 7a and the second clamp 7b, an arc groove 7d is provided on the outer side of each boss 7c, and a semicircular groove 7e is provided on the inner side of the boss 7c.

[0027] The two bosses 7c are combined into a truncated cone, the two arc grooves 7d are annular, and the two semicircular grooves 7e are circular holes to match the hook guide column 4. An elastic ring 7f is sleeved in the two annular arc grooves 7d. The elastic ring 7f is an open ring made of elastic metal.

[0028] Correspondingly distributed conical grooves 7g are provided at both ends of the other side of the first clamping piece 7a and the second clamping piece 7b, and the two correspondingly distributed conical grooves 7g form a support hole 7t.

[0029] Two L-shaped mounting frames 6 extend outwardly from both sides of the outer wall of the hook head insertion groove 5a, and the two mounting frames 6 form a second mounting groove. The first mounting groove 5 and the second mounting groove are distributed in a cross shape at the insertion end of the left rack 2.

[0030] An electric expander 8 is mounted on each mounting bracket 6. The end of the output shaft of the electric expander 8 is provided with symmetrically distributed beveled edges so as to form a conical expansion head 8a corresponding to the expansion hole 7t at the end.

[0031] The electric telescopic device 8 is an electrician push rod or an electromagnetic telescopic device in the prior art. Since it is the prior art, its structure is not described here. The electromagnetic telescopic device is used in Example 1.

[0032] When the left and right racks 2 and 3 need to be connected together to form a transmission, the electric expander 8 is energized, and the output shaft of the electric expander 8 extends out of the expansion head 8a and inserts into the expansion hole 7t to expand the first clip 7a and the second clip 7b. At the same time, the hook head part of the hook head guide column 4 is inserted into the semicircular groove 7e to squeeze the first clip 7a and the second clip 7b apart on both sides, so that the two clips are displaced outward in the secondary groove body 5d to separate, so that the hook head part can pass through, and the elastic ring 7f is deformed axially. After the hook head part is inserted into the hook head insertion groove 5a, the first clip 7a and the second clip 7b are displaced inward in the secondary groove body 5d under the elastic force of the elastic ring 7f, and the two clips are closed, thereby completing the connection of the left and right racks 2 and 3. Example

[0033] like Figure 4and 5 As shown in 5 , the differences between Embodiment 1 and Embodiment 2 lie in the differences between the first clamping piece 7a and the second clamping piece 7b in the movable clamping component 7 and the installation direction of the electric telescopic device 8. For other identical positions, it is really redundant to describe here.

[0034] The movable clamping component 7 includes a first clamping piece 7a and a second clamping piece 7b which are oppositely distributed. The main bodies of the first clamping piece 7a and the second clamping piece 7b are trapezoidal. At both ends on the other side of the first clamping piece 7a and the second clamping piece 7b, there are oppositely distributed inclined chamfers. The two chamfers oppositely distributed on the same side form a V-shaped groove 7y corresponding to and cooperating with the opening head 8a. The axial direction of the output shaft of the electric telescopic device 8 is vertically distributed with respect to the left rack 2 and the right rack 3.

Claims

1. An on-off device for a steering gear, which comprises a housing (1), a left rack (2) is inserted into one end of the housing (1), and a right rack (3) is inserted into the other end of the housing (1), and is characterized in that: A hook head guide post (4) extends from the insertion end of the right rack (3). At the end of the insertion end of the left rack (2), a first installation groove (5) and a pair of mounting brackets (6) are provided. The two mounting brackets (6) form a second installation groove body. An active clamping component (7) corresponding to the hook head guide post (4) is installed on the first installation groove (5). An electric telescopic device (8) is installed on each mounting bracket (6). The end of the output shaft of the electric telescopic device (8) is provided with a propping head (8a) corresponding to the active clamping component (7).

2. The on-off device of a steering gear according to claim 1, characterized in that: The active clamping component (7) includes a first clamping piece (7a) and a second clamping piece (7b) distributed relatively. The first clamping piece (7a) and the second clamping piece (7b) are provided with inserting strips (7h) correspondingly penetrating through the two side groove walls of the first installation groove (5). There is a margin for the first clamping piece (7a) and the second clamping piece (7b) to move along the inserting strips (7h). On one side of the middle parts of the first clamping piece (7a) and the second clamping piece (7b), a boss (7c) is provided on each. An arc groove (7d) and a semi-circular groove (7e) are provided on each boss (7c). After the two bosses (7c) are combined, they form a frustum shape. The two arc grooves (7d) form a ring shape. The two semi-circular grooves (7e) form a circular hole shape for corresponding cooperation with the hook head guide post (4). An elastic ring (7f) is sleeved in the two semi-circular grooves (7e) in the ring shape. At both ends of the other side of the first clamping piece (7a) and the second clamping piece (7b), correspondingly distributed conical grooves (7g) are provided. The correspondingly distributed conical grooves (7g) form a conical propping opening (7t) corresponding to the propping head (8a). The axial direction of the electric telescopic device (8) is coaxially distributed with the left rack (2) and the right rack (3).

3. The on-off device of a steering gear according to claim 1, characterized in that: The active clamping component (7) includes a first clamping piece (7a) and a second clamping piece (7b) distributed relatively. The first clamping piece (7a) and the second clamping piece (7b) are provided with inserting strips (7h) correspondingly penetrating through the two side groove walls of the first installation groove (5). There is a margin for the first clamping piece (7a) and the second clamping piece (7b) to move along the inserting strips (7h). On one side of the middle parts of the first clamping piece (7a) and the second clamping piece (7b), a boss (7c) is provided on each. An arc groove (7d) and a semi-circular groove (7e) are provided on each boss (7c). After the two bosses (7c) are combined, they form a frustum shape. The two arc grooves (7d) form a ring shape. The two semi-circular grooves (7e) form a circular hole shape for corresponding cooperation with the hook head guide post (4). An elastic ring (7f) is sleeved in the two semi-circular grooves (7e) in the ring shape. At both ends of the other side of the first clamping piece (7a) and the second clamping piece (7b), relatively distributed inclined chamfers are provided. The two relatively distributed inclined chamfers form a V-shaped groove (7y) corresponding to the propping head (8a). The axial direction of the output shaft of the electric telescopic device (8) is vertically distributed with the left rack (2) and the right rack (3).

4. The on-off device of a steering gear according to claim 2, characterized in that: The elastic ring (7f) is a circular ring made of rubber or an open ring made of metal.

5. The on-off device of a steering gear according to claim 1, characterized in that: The first installation groove (5) and the second installation groove are distributed in a cross shape at the end of the insertion end of the left rack (2).

6. The on-off device of a steering gear according to claim 1, characterized in that: The hook-shaped guide post (4) described above includes a column body (4a) with a diameter smaller than that of the right rack. At the end of the column body (4a), there is a diameter enlarged section (4b). At the end of the diameter enlarged section (4b), there is an annular edge chamfer (4c), so as to form a conical hook-shaped part.

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