Flexible feeding mechanism for assembling parallel shaft type steering gear ball screw pair

Abstract

The utility model relates to the technical field of steering systems, in particular to a flexible feeding mechanism for assembling a ball screw pair of a parallel shaft type steering machine. A flexible feeding mechanism for assembling a ball screw pair of a parallel shaft type steering machine comprises a base and a positioning bottom plate and is characterized in that the base is connected with a rack containing mechanism, a tooth surface fool-proof air cylinder assembly is arranged above the rack containing mechanism, a rack grease injection mechanism is arranged above the tooth surface fool-proof air cylinder assembly, and the rack grease injection mechanism is connected with the positioning bottom plate. A nut positioning and clamping mechanism is arranged above the rack grease injection mechanism; the rear sides of the nut positioning and clamping mechanism, the rack grease injection mechanism and the tooth surface fool-proof air cylinder assembly are connected with the positioning bottom plate, and the bottom of the positioning bottom plate is connected with the base. Compared with the prior art, the flexible feeding mechanism for assembling the ball screw pair of the parallel shaft type steering machine can be compatible with racks with different diameters, different steering nut heights and different rack lengths, and it is guaranteed that a ball screw and a belt can be reasonably fed.

Description

Technical Field

[0001] This utility model relates to the field of steering system technology, specifically a flexible feeding mechanism for assembling ball screw pairs in parallel shaft steering gears. Background Technology

[0002] Belt-driven steering gears are increasingly used by electric vehicle manufacturers due to their ability to provide greater power assistance and a more efficient transmission method. However, finding a suitable ball screw pair feeding method during the automated assembly of the steering gear short assembly is a challenge for industrial implementation. The key issue is how to achieve high stability, high efficiency, and compatibility. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a flexible feeding mechanism for assembling ball screw pairs in parallel shaft steering gears. This mechanism can accommodate racks of different diameters, steering nut heights, and rack lengths, ensuring that both the ball screw and belt are fed appropriately.

[0004] To achieve the above objectives, a flexible feeding mechanism for assembling ball screw pairs in parallel-axis steering gears is designed, comprising a base and a positioning base plate. The mechanism is characterized by: a rack placement mechanism connected to the base; a tooth surface anti-misalignment cylinder assembly positioned above the rack placement mechanism; a rack grease injection mechanism positioned above the tooth surface anti-misalignment cylinder assembly; and a nut positioning and clamping mechanism positioned above the rack grease injection mechanism. The rear sides of the nut positioning and clamping mechanism, the rack grease injection mechanism, and the tooth surface anti-misalignment cylinder assembly are connected to the positioning base plate, and the bottom of the positioning base plate is connected to the base.

[0005] The nut positioning and clamping mechanism includes a bearing positioning cylinder, a bearing clamping jaw, a belt limiting block, a belt tensioning cylinder, a nut base, and a nut positioning and clamping mechanism base. The back of the nut positioning and clamping mechanism base is connected to the positioning base plate. A bearing clamping jaw is located above the nut positioning and clamping mechanism base. The bearing clamping jaw has a left and right jaw structure. One end of the left and right jaw structures is located above the nut positioning and clamping mechanism base, and the other end of the left and right jaw structures is connected to the bearing positioning cylinder. The bottom of the bearing positioning cylinder is connected to the positioning base plate through a cylinder bracket.

[0006] The nut positioning and clamping mechanism base has an arc-shaped groove structure in the middle. The inner side of the arc-shaped groove is connected to the nut base. A belt limiting block is provided on one side of the nut base. The bottom of the belt limiting block is connected to the nut positioning and clamping mechanism base. A belt tensioning cylinder is connected to one side of the nut positioning and clamping mechanism base. The drive shaft of the belt tensioning cylinder passes through one side of the nut positioning and clamping mechanism base and is located below the arc-shaped groove.

[0007] The rack grease injection mechanism includes a rack grease injection mechanism base plate, a tooth face end grease injection head, a D+P grease injection valve, a waste material frame, and a tooth back end grease injection head. The rack grease injection mechanism base plate is connected to a positioning base plate located below the nut positioning and clamping mechanism base. The front part of the rack grease injection mechanism base plate is connected to a grease injection head control cylinder. The left and right ends of the grease injection head control cylinder are respectively connected to the D+P grease injection valves via connectors. The output ends of the two D+P grease injection valves are respectively connected to the tooth face end grease injection head and the tooth back end grease injection head. A waste material frame is provided below the tooth face end grease injection head and the tooth back end grease injection head.

[0008] The tooth surface anti-mistake cylinder assembly includes a tooth surface anti-mistake cylinder mounting base plate, a tooth surface anti-mistake cylinder, and a tooth surface limiting block. The tooth surface anti-mistake cylinder is located below the waste frame. The bottom of the tooth surface anti-mistake cylinder is connected to the positioning base plate through the tooth surface anti-mistake cylinder mounting base plate, and the top of the tooth surface anti-mistake cylinder is connected to the tooth surface limiting block.

[0009] The rack placement mechanism includes a rack positioning block, an image recognition system, a feeding cylinder, a lead screw, a rack height adjustment motor, and a slide rail. The slide rail is connected to the base, and a feeding cylinder is located on one side of the slide rail. The lead screw is connected to the front side of the positioning base plate, and the rack positioning block is connected to the lead screw through a lead screw nut. The bottom end of the lead screw is connected to the rack height adjustment motor. An image recognition system is located on one side of the rack positioning block.

[0010] Compared with the prior art, this utility model provides a flexible feeding mechanism for assembling ball screw pairs in parallel shaft steering gears. This mechanism can accommodate racks of different diameters, steering nut heights, and rack lengths, ensuring that both the ball screw and belt can be fed properly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the nut positioning and clamping mechanism in this utility model.

[0013] Figure 3 This is a schematic diagram of the grease injection mechanism for the rack in this utility model.

[0014] Figure 4 This is a schematic diagram of the structure of the anti-foolproof cylinder assembly with toothed surface in this utility model.

[0015] Figure 5 This is a schematic diagram of the rack and pinion placement mechanism in this utility model.

[0016] Figure 6 This is a schematic diagram of the utility model in use. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a rack placement mechanism 4 is connected to the base 6. A tooth surface anti-fooling cylinder assembly 3 is provided above the rack placement mechanism 4. A rack grease injection mechanism 2 is provided above the rack grease injection mechanism 2. A nut positioning and clamping mechanism 1 is provided above the rack grease injection mechanism 2. The rear side of the nut positioning and clamping mechanism 1, the rack grease injection mechanism 2, and the tooth surface anti-fooling cylinder assembly 3 is connected to the positioning base plate 5. The bottom of the positioning base plate 5 is connected to the base 6.

[0019] like Figure 2 As shown, the nut positioning and clamping mechanism 1 includes a bearing positioning cylinder, a bearing clamping jaw, a belt limiting block, a belt tensioning cylinder, a nut base, and a nut positioning and clamping mechanism base. The back of the nut positioning and clamping mechanism base 1-6 is connected to the positioning base plate 5. A bearing clamping jaw 1-2 is provided above the nut positioning and clamping mechanism base 1-6. The bearing clamping jaw 1-2 is a left and right jaw structure. One end of the left and right jaw structures is located above the nut positioning and clamping mechanism base 1-6, and the other end of the left and right jaw structures is connected to the bearing positioning cylinder 1-1. The bottom of the bearing positioning cylinder 1-1 is connected to the positioning base plate 5 through a cylinder bracket 1-7.

[0020] The center of the nut positioning and clamping mechanism base 1-6 is an arc-shaped groove structure. The inner side of the arc-shaped groove is connected to the nut base 1-5. A belt limit block 1-3 is provided on one side of the nut base 1-5. The bottom of the belt limit block 1-3 is connected to the nut positioning and clamping mechanism base 1-6. A belt tensioning cylinder 1-4 is connected to one side of the nut positioning and clamping mechanism base 1-6. The drive shaft of the belt tensioning cylinder 1-4 passes through one side of the nut positioning and clamping mechanism base 1-6 and is located below the arc-shaped groove.

[0021] The bearing positioning cylinder 1-1 is the motion actuator used to determine the position of the ball screw pair in the feeding mechanism of this utility model; the bearing clamping jaw 1-2 is installed into the housing after ensuring the relative position of the wave spring in the steering nut is not fixed; the nut base 1-5 is the lower edge contour block of the steering nut, which is clearance-fitted with the nut positioning clamping mechanism base 1-6 for easy placement by the operator; the belt limit block 1-3 keeps the belt in a tensioned state during assembly; the bearing positioning cylinder 1-1 is the actuator for pushing and pulling the belt limit block 1-3.

[0022] like Figure 3As shown, the rack grease injection mechanism 2 includes a rack grease injection mechanism base plate, a tooth face end grease injection head, a D+P grease injection valve, a waste material frame, and a tooth back end grease injection head. The rack grease injection mechanism base plate 2-1 is connected to the positioning base plate 5 located below the nut positioning and clamping mechanism base 1-6. The front part of the rack grease injection mechanism base plate 2-1 is connected to the grease injection head control cylinder 2-6. The left and right ends of the grease injection head control cylinder 2-6 are respectively connected to the D+P grease injection valve 2-3 through connectors. The output ends of the two D+P grease injection valves 2-3 are respectively connected to the tooth face end grease injection head 2-2 and the tooth back end grease injection head 2-5. A waste material frame 2-4 is provided below the tooth face end grease injection head 2-2 and the tooth back end grease injection head 2-5.

[0023] The tooth surface grease injection head 2-2 is a replaceable grease dispensing tool according to different tooth surface shapes and rack diameters; the tooth back grease injection head 2-5 is a replaceable grease dispensing tool according to different tooth back shapes and rack diameters; the D+P oil injection valve 2-3 is a reliable and stable quantitative oil dispensing valve.

[0024] like Figure 4 As shown, the tooth surface anti-mistake cylinder assembly 3 includes a tooth surface anti-mistake cylinder mounting base plate, a tooth surface anti-mistake cylinder, and a tooth surface limiting block. A tooth surface anti-mistake cylinder 3-1 is provided below the waste frame 2-4. The bottom of the tooth surface anti-mistake cylinder 3-1 is connected to the positioning base plate 5 through the tooth surface anti-mistake cylinder mounting base plate 3-3, and the top of the tooth surface anti-mistake cylinder 3-1 is connected to the tooth surface limiting block 3-2.

[0025] The tooth surface limit block 3-2 is a limit device designed to prevent abnormal oil injection caused by the rack rotating or the tooth surface being misaligned.

[0026] like Figure 5 As shown, the rack placement mechanism 4 includes a rack positioning block, an image recognition system, a feeding cylinder, a lead screw, a rack height adjustment motor, and a slide rail. The slide rail 4-6 is connected to the base 6, and a feeding cylinder 4-3 is provided on one side of the slide rail 4-6. The lead screw 4-4 is connected to the front side of the lower part of the positioning base plate 5. The rack positioning block 4-1 is connected to the lead screw 4-4 through a lead screw nut. The bottom end of the lead screw 4-4 is connected to the rack height adjustment motor 4-5. An image recognition system 4-2 is provided on one side of the rack positioning block 4-1.

[0027] The rack positioning block 4-1 is a limiting mechanism for the bottom groove of the rack; the image recognition system 4-2 is used to identify the rack status, such as whether it is a qualified product; the lead screw 4-4 is used to drive the rack positioning block 4-1 to move in the Z direction; the rack height adjustment motor 4-5 is used to drive the rack positioning block 4-1 to move in the Z direction, which is compatible with the feeding process under different rack lengths; the slide rail 4-6 is used to assist the feeding cylinder 4-3 to move in the X direction, ensuring the stability of feeding; the feeding cylinder 4-3 feeds the entire ball screw pair and belt into the equipment for assembly.

[0028] like Figure 6 As shown, the working principle of this utility model is as follows: First, the operator places the ball screw on the nut positioning and clamping mechanism base 1-6 of the nut positioning and clamping mechanism 1, and puts the belt onto the belt tensioning cylinder 1-4 and the large pulley at the end of the screw. To prevent the rack from slipping, the rack height adjustment motor 4-5 of the rack placement mechanism 4 starts to rise to the appropriate position. At this time, the bottom of the rack positioning block 4-1 contacts the end of the rack. After the image recognition system 4-2 scans the QR code on the rack material and judges it to be qualified, the tooth surface anti-fooling cylinder 3-1 extends to check whether the tooth surface orientation is correct. If the rack is placed incorrectly, the incorrect orientation will cause the grease injection head 2-2 at the tooth surface end and the grease injection head 2-5 at the tooth back end to work abnormally. The bearing positioning cylinder 1-1 closes to reshape the steering nut sub-assembly to prevent the wave spring from moving during the movement of the feeding cylinder 4-3. In severe cases, the wave spring will disengage from the steering nut.

Claims

1. A flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear, comprising a base and a positioning base plate, characterized in that: A rack placement mechanism (4) is connected to the base (6). A tooth surface anti-fool cylinder assembly (3) is provided above the rack placement mechanism (4). A rack grease injection mechanism (2) is provided above the rack grease injection mechanism (2). A nut positioning and clamping mechanism (1) is provided above the rack grease injection mechanism (2). The rear side of the nut positioning and clamping mechanism (1), the rack grease injection mechanism (2), and the tooth surface anti-fool cylinder assembly (3) is connected to the positioning base plate (5). The bottom of the positioning base plate (5) is connected to the base (6).

2. The flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear according to claim 1, characterized in that: The nut positioning and clamping mechanism (1) includes a bearing positioning cylinder, a bearing clamping claw, a belt limiting block, a belt tensioning cylinder, a nut base, and a nut positioning and clamping mechanism base. The back of the nut positioning and clamping mechanism base (1-6) is connected to the positioning base plate (5). A bearing clamping claw (1-2) is provided above the nut positioning and clamping mechanism base (1-6). The bearing clamping claw (1-2) is a left and right claw structure. One end of the left and right claw structure is located above the nut positioning and clamping mechanism base (1-6), and the other end of the left and right claw structure is connected to the bearing positioning cylinder (1-1). The bottom of the bearing positioning cylinder (1-1) is connected to the positioning base plate (5) through a cylinder bracket (1-7).

3. The flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear according to claim 2, characterized in that: The nut positioning and clamping mechanism base (1-6) has an arc-shaped groove structure in the middle. The inner side of the arc-shaped groove is connected to the nut base (1-5). A belt limiting block (1-3) is provided on one side of the nut base (1-5). The bottom of the belt limiting block (1-3) is connected to the nut positioning and clamping mechanism base (1-6). A belt tensioning cylinder (1-4) is connected to one side of the nut positioning and clamping mechanism base (1-6). The drive shaft of the belt tensioning cylinder (1-4) passes through one side of the nut positioning and clamping mechanism base (1-6) and is located below the arc-shaped groove.

4. The flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear according to claim 1, characterized in that: The rack grease injection mechanism (2) includes a rack grease injection mechanism base plate, a tooth face end grease injection head, a D+P grease injection valve, a waste material frame, and a tooth back end grease injection head. The rack grease injection mechanism base plate (2-1) is connected to the positioning base plate (5) located below the nut positioning and clamping mechanism base (1-6). The front part of the rack grease injection mechanism base plate (2-1) is connected to the grease injection head control cylinder (2-6). The left and right ends of the grease injection head control cylinder (2-6) are respectively connected to the D+P grease injection valve (2-3) through connectors. The output ends of the two D+P grease injection valves (2-3) are respectively connected to the tooth face end grease injection head (2-2) and the tooth back end grease injection head (2-5). A waste material frame (2-4) is provided below the tooth face end grease injection head (2-2) and the tooth back end grease injection head (2-5).

5. The flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear according to claim 1, characterized in that: The tooth surface anti-mistake cylinder assembly (3) includes a tooth surface anti-mistake cylinder mounting base plate, a tooth surface anti-mistake cylinder, and a tooth surface limiting block. A tooth surface anti-mistake cylinder (3-1) is provided below the waste frame (2-4). The bottom of the tooth surface anti-mistake cylinder (3-1) is connected to the positioning base plate (5) through the tooth surface anti-mistake cylinder mounting base plate (3-3), and the top of the tooth surface anti-mistake cylinder (3-1) is connected to the tooth surface limiting block (3-2).

6. The flexible feeding mechanism for assembling ball screw pairs in a parallel-axis steering gear according to claim 1, characterized in that: The rack placement mechanism (4) includes a rack positioning block, an image recognition system, a feeding cylinder, a lead screw, a rack height adjustment motor, and a slide rail. The slide rail (4-6) is connected to the base (6), and a feeding cylinder (4-3) is provided on one side of the slide rail (4-6). The lead screw (4-4) is connected to the front side of the lower part of the positioning base plate (5). The rack positioning block (4-1) is connected to the lead screw (4-4) through a lead screw nut. The bottom end of the lead screw (4-4) is connected to the rack height adjustment motor (4-5). An image recognition system (4-2) is provided on one side of the rack positioning block (4-1).

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