Detection tool and detection method for position accuracy of spline bottom hole of automobile steering yoke

Abstract

The invention discloses an automobile steering yoke spline bottom hole position accuracy detection tool and detection method. The detection tool comprises a base, and the upper end of the base is provided with a positioning assembly and a supporting assembly; the positioning assembly comprises a fixed seat; an end face positioning block is slidably installed in an inner cavity of the fixing base. The bottom of the end face positioning block is connected with a splined hole positioning insertion core; a handle is installed on the side wall of the end face positioning block. An inverted L-shaped avoiding groove for the handle to move is formed in the side wall of the fixed seat; the supporting assembly comprises a fixed supporting block installed on the base. An auxiliary supporting block is mounted on the fixed supporting block; the upper end faces of the two sides of the auxiliary supporting block are matched with the L-shaped inner end face of the ear hole end of the to-be-detected workpiece. And the outer diameter size of the spline hole positioning insertion core is matched with the size of a spline bottom hole of a workpiece to be detected. The device has the advantages that the position degree of the spline bottom hole of the automobile steering yoke relative to the three reference surfaces of the end surface, the lug hole and the inner end surface can be rapidly detected.

Description

Technical Field

[0001] This invention relates to the field of steering knuckle fork position measurement technology, and particularly to a tool for measuring the position of the spline bottom hole of an automotive steering knuckle fork. Background Technology

[0002] The steering knuckle fork is one of the main components of the automotive steering system. It is a key component connecting the wheels and the steering mechanism, playing a crucial role in directional control during vehicle operation and directly affecting handling stability and driving safety. For automotive steering knuckle forks with splined holes, the positional accuracy of the splined holes is related to multiple reference surfaces. The commonly used inspection method is precision coordinate measuring machine (CMM), which, while accurate, is inefficient and unsuitable for mass production lines of steering knuckle forks. Therefore, designing a fixture and inspection method for quickly inspecting the positional accuracy of the splined holes is of paramount importance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tool for quickly detecting the position of the spline bottom hole of an automotive steering knuckle fork.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is a position gauge for the spline bottom hole of an automotive steering knuckle fork, comprising a base, a positioning component and a support component mounted on the upper end of the base; the positioning component includes a fixed seat; an end face positioning block is slidably mounted in the inner cavity of the fixed seat; a spline hole positioning insert is connected to the bottom of the end face positioning block; a handle is mounted on the side wall of the end face positioning block; an inverted "L"-shaped clearance groove is formed on the side wall of the fixed seat for the handle to move; the support component includes a fixed support block mounted on the base; an auxiliary support block is mounted on the fixed support block; the upper end faces of both sides of the auxiliary support block match the "L"-shaped inner end face of the ear hole end of the workpiece to be inspected. The outer diameter of the spline hole positioning insert matches the size of the spline bottom hole of the workpiece to be inspected.

[0005] Furthermore, a positioning flange is provided at the lower end of the end face positioning block.

[0006] Furthermore, the spline hole positioning insert is integrally connected to the bottom of the end face positioning block or can be detachably connected by screws.

[0007] In another further embodiment, the spline hole positioning insert is slidably installed in the inner cavity of the end face positioning block, and both ends extend beyond the end face positioning block; a flange is connected to the top of the spline hole positioning insert; a first spring is sleeved on the upper end of the spline hole positioning insert that extends beyond the end face positioning block; a first limiting groove is opened on the side wall of the spline hole positioning insert; a first limiting pin is installed on the end face positioning block and extends to be inserted into the first limiting groove.

[0008] Furthermore, the fixing seat is detachably mounted on the top of the support seat by fastening screws and positioning pins; the support seat is detachably mounted on the base by fastening screws and positioning pins; one end of the handle is threadedly connected to the end face positioning block.

[0009] Furthermore, the auxiliary support block is movably installed in the inner cavity of the fixed support block, and grooves for placing the second spring are provided on the bottom of the auxiliary support block and on the base; the second spring is placed in the groove.

[0010] Furthermore, a support block is fixedly installed at the bottom of the base; one end of the second spring contacts the top of the support block; a second limiting groove is provided on the side wall of the auxiliary support block; a second limiting pin is installed on the fixed support block and extends into the second limiting groove.

[0011] Furthermore, an ear hole detection component is installed on the upper end of the base; the ear hole detection component includes a support block; a limit block is installed in the inner cavity of the support block; one end of the grip rod is connected to an ear hole insert; the ear hole insert can be slidably connected to the inner cavity of the limit block.

[0012] Furthermore, the gripping rod is connected to the ear canal insert by screws; an ear canal insert placement bucket for placing the ear canal insert is installed on the base; a pad is installed between the bottom of the support block and the base.

[0013] This invention also provides a method for detecting the positional accuracy of the spline bottom hole of an automotive steering knuckle fork, using the aforementioned automotive steering knuckle fork spline bottom hole positional accuracy gauge. The specific steps are as follows: S1. Place the workpiece to be tested on the fixed support block, and make the inner end faces on both sides of the workpiece contact the upper end faces on both sides of the auxiliary support block, keeping it in a hand-holding position. S2. Hold the handle with your other hand and turn it to the left, causing the end face positioning block and spline hole positioning insert to rotate until the handle is rotated to the vertical section of the clearance groove. The end face positioning block begins to descend, and the spline hole positioning insert also descends. The spline hole positioning insert is inserted into the spline bottom hole of the workpiece, and the positioning flange presses against the upper end face of the workpiece, completing the clamping and positioning of the workpiece. S3. Hold the gripping rod and insert the ear hole insert into the limiting hole of the limiting block, and continue to push forward. If the ear hole insert can smoothly pass through the two ear holes of the workpiece and pass through the limiting hole of the limiting block on the other side, it proves that the position of the spline bottom hole of the workpiece relative to the fork end face, ear hole, and inner end face is qualified; if it cannot pass through smoothly, it means that the position is unqualified.

[0014] Beneficial effects of this invention: The inspection fixture of this invention has a simple structure and a clever and reasonable design. It can quickly detect the position of the bottom hole of the automotive steering knuckle fork spline relative to the three reference planes: the end face, the lug hole, and the inner end face. While ensuring the accuracy of the inspection, it can effectively improve the inspection efficiency. It fundamentally overcomes the shortcomings of traditional inspection relying on coordinate measuring machines, which is time-consuming and inefficient. It can fully meet the needs of large-scale production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of Example 1; Figure 2 This is a side sectional view of Example 1; Figure 3 This is a three-dimensional view of the overall structure of Example 2; Figure 4 This is the front view of Example 2; Figure 5 This is the left view of Example 2; Figure 6 for Figure 4 A sectional view; Figure 7 for Figure 5 A sectional view; Figure 8 This is a partial structural cross-sectional view of Example 2 in its initial state; Figure 9 A schematic diagram of the structure after the spline hole has been machined on the workpiece.

[0016] In the diagram, 1-base, 2-support base, 3-fixed base, 4-end face positioning block, 5-spline hole positioning insert, 6-first spring, 7-handle, 8-support block, 9-ear hole insert, 10-positioning flange, 11-flange, 12-fixed support block, 13-limiting block, 14-grip, 15-auxiliary support block, 16-ear hole insert placement bucket, 17-pad, 18-foot, 19-clearance groove, 20-support block, 21-second spring, 22-first limiting pin, 23-first limiting groove. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0018] Example 1 A tool for measuring the position of the spline bottom hole of an automotive steering knuckle fork, such as Figure 1-2As shown, the system includes a base 1, with a positioning component and a support component mounted on its upper end. The positioning component includes a fixed base 3; an end face positioning block 4 is slidably mounted in the inner cavity of the fixed base 3; a spline hole positioning insert 5 is connected to the bottom of the end face positioning block 4; a handle 7 is mounted on the side wall of the end face positioning block 4; an inverted "L"-shaped clearance groove 19 is provided on the side wall of the fixed base 3 for the handle 7 to move; the support component includes a fixed support block 12 mounted on the base 1; an auxiliary support block 15 is mounted on the fixed support block 12; the upper ends of both sides of the auxiliary support block 15 match the "L"-shaped inner end face of the ear hole end of the workpiece to be inspected. The outer diameter of the spline hole positioning insert 5 matches the size of the spline bottom hole of the workpiece to be inspected.

[0019] Specifically, the bottom of the base 1 is equipped with feet 18.

[0020] Specifically, a positioning flange 10 is provided at the lower end of the end face positioning block 4.

[0021] Specifically, the spline hole positioning insert 5 is integrally connected to the bottom of the end face positioning block 4. In another embodiment, the spline hole positioning insert 5 and the bottom of the end face positioning block 4 can also be detachably connected by screws.

[0022] Specifically, the fixed base 3 is detachably mounted on the top of the support base 2 by fastening screws and positioning pins; the support base 2 is detachably mounted on the base 1 by fastening screws and positioning pins; one end of the handle 7 is threadedly connected to the end face positioning block 4.

[0023] Specifically, the auxiliary support block 15 is movably installed within the inner cavity of the fixed support block 12. Grooves for placing the second spring 21 are provided on the bottom of the auxiliary support block 15 and on the base 1; the second spring 21 is placed within the grooves. The auxiliary support block 15 can float up and down within a certain stroke by using the second spring 21. Specifically, a support block 20 is fixedly installed at the bottom of the base 1; one end of the second spring 21 contacts the top of the support block 20; a second limiting groove is provided on the side wall of the auxiliary support block 15; and a second limiting pin is installed on the fixed support block 12 and extends into the second limiting groove.

[0024] Specifically, an ear hole detection component is installed on the upper end of the base 1; the ear hole detection component includes a support block 8; a limit block 13 is installed in the inner cavity of the support block 8; one end of the holding rod 14 is connected to an ear hole insert 9; the ear hole insert 9 can be slidably connected to the inner cavity of the limit block 13.

[0025] Specifically, the gripping rod 14 is connected to the ear canal insert 9 by screws; an ear canal insert placement bucket 16 for placing the ear canal insert 9 is installed on the base 1; a pad 17 is installed between the bottom of the support block 8 and the base 1.

[0026] Example 2 A tool for measuring the position of the spline bottom hole of an automotive steering knuckle fork, such as Figure 3-8 As shown, compared to Embodiment 1, only the local structure of the positioning component has been changed, while the other structures are the same as in Embodiment 1.

[0027] Specifically, the spline hole positioning insert 5 is slidably installed in the inner cavity of the end face positioning block 4, with both ends extending beyond the end face positioning block 4; a flange 11 is connected to the top of the spline hole positioning insert 5; a first spring 6 is sleeved on the upper end of the spline hole positioning insert 5 extending beyond the end face positioning block 4; a first limiting groove 23 is formed on the side wall of the spline hole positioning insert 5; a first limiting pin 22 is installed on the end face positioning block 4 and extends to be inserted into the first limiting groove 23. The first limiting pin 22 and the first limiting groove 23 cooperate to transmit rotation on the one hand, and limit the vertical movement of the spline hole positioning insert 5 relative to the end face positioning block 4 on the other hand. The first spring 6 can buffer the vertical movement of the spline hole positioning insert 5.

[0028] Compared to Example 1, designing the spline hole positioning ferrule 5 and the end face positioning block 4 as two independent parts can significantly reduce the processing difficulty and cost. In addition, the spline hole positioning ferrule 5 is prone to wear, and the cost of replacement is low due to the separate design.

[0029] Example 3 A method for detecting the position accuracy of the spline bottom hole in an automotive steering knuckle fork, comprising the following specific steps: S1. Place the workpiece to be tested on the fixed support block 12, and make the inner end faces on both sides of the workpiece contact the upper end faces on both sides of the auxiliary support block 15, and keep it in a hand-holding state. Figure 9 A schematic diagram of the structure of an automotive steering knuckle fork after the spline holes have been machined. S2. Hold the handle 7 with your other hand and turn it to the left, causing the end face positioning block 4 and the spline hole positioning insert 5 to rotate until the handle 7 rotates to the vertical section of the clearance groove 19. The end face positioning block 4 begins to descend, and the spline hole positioning insert 5 also descends. The spline hole positioning insert 5 is inserted into the spline bottom hole of the workpiece, and the positioning flange 10 presses against the upper end face of the workpiece to complete the clamping and positioning of the workpiece. S3. Hold the gripping rod 14 and insert the ear hole insert 9 into the limiting hole of the limiting block 13, and continue to push forward. If the ear hole insert 9 can smoothly pass through the two ear holes of the workpiece and pass through the limiting hole of the limiting block 13 on the other side, it proves that the position of the spline bottom hole of the workpiece relative to the fork end face, ear hole, and inner end face is qualified; if it cannot pass through smoothly, it means that the position is unqualified.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A position gauge for spline bottom hole of automobile steering knuckle fork, comprising a base (1), characterized in that: The upper end of the base (1) is provided with a positioning assembly and a supporting assembly; the positioning assembly comprises a fixed seat (3); an end face positioning block (4) is slidably arranged in the inner cavity of the fixed seat (3); the bottom of the end face positioning block (4) is connected with a spline hole positioning insert core (5); a handle (7) is arranged on the side wall of the end face positioning block (4); an inverted "L" type avoiding groove (19) is formed in the side wall of the fixed seat (3) for the movement of the handle (7); the supporting assembly comprises a fixed supporting block (12) arranged on the base (1); an auxiliary supporting block (15) is arranged on the fixed supporting block (12); the upper end faces of the two sides of the auxiliary supporting block (15) are matched with the inner end faces of the "L" type ear hole of the workpiece to be detected.

2. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: The lower end of the end face positioning block (4) is provided with a positioning flange (10).

3. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: The spline hole positioning insert core (5) is integrally connected with the bottom of the end face positioning block (4) or is detachably connected through a screw.

4. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: The spline hole positioning insert core (5) is slidably arranged in the inner cavity of the end face positioning block (4) and extends beyond the end face positioning block (4) at both ends; a flange (11) is connected to the top of the spline hole positioning insert core (5); a first spring (6) is sleeved on the outer portion of the upper end of the spline hole positioning insert core (5) beyond the end face positioning block (4); a first limiting groove (23) is formed in the side wall of the spline hole positioning insert core (5); a first limiting pin (22) is arranged on the end face positioning block (4) and extends into the first limiting groove (23).

5. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: The fixed seat (3) is detachably arranged on the top of the supporting seat (2) through a fastening screw and a positioning pin; the supporting seat (2) is detachably arranged on the base (1) through a fastening screw and a positioning pin; one end of the handle (7) is threadedly connected with the end face positioning block (4).

6. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: The auxiliary supporting block (15) is movably arranged in the inner cavity of the fixed supporting block (12); recesses for placing second springs (21) are formed in the bottom of the auxiliary supporting block (15) and the base (1); the second springs (21) are placed in the recesses.

7. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 6, characterized in that: A supporting block (20) is fixedly arranged in the bottom of the base (1); one end of the second spring (21) is in contact with the top of the supporting block (20); a second limiting groove is formed in the side wall of the auxiliary supporting block (15); a second limiting pin is arranged on the fixed supporting block (12) and extends into the second limiting groove.

8. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 1, characterized in that: An ear hole detection assembly is arranged at the upper end of the base (1); the ear hole detection assembly comprises a supporting block (8); a limiting block (13) is arranged in the inner cavity of the supporting block (8); an ear hole insert core (9) is connected to one end of a holding rod (14); the ear hole insert core (9) is slidably connected with the inner cavity of the limiting block (13).

9. The automotive knuckle fork spline bottom hole location degree checking fixture according to claim 8, characterized in that: The holding rod (14) and the ear hole insert core (9) are connected through a screw; an ear hole insert core placing barrel (16) for placing the ear hole insert core (9) is arranged on the base (1); a backing plate (17) is arranged between the bottom of the supporting block (8) and the base (1).

10. A method for detecting the position of the spline bottom hole of an automobile knuckle fork, characterized in that: The automobile steering knuckle fork spline bottom hole position gauge is used for detection, and the specific steps are as follows: S1, the workpiece to be detected is placed on the fixed support block (12), and the inner end faces on both sides of the workpiece are in contact with the upper end faces on both sides of the auxiliary support block (15), and the hand is held in a state; S2, the other hand holds the handle (7) and rotates to the left, driving the end face positioning block (4) and the spline hole positioning insert core (5) to rotate until the handle (7) is rotated to the vertical section of the avoidance groove (19), the end face positioning block (4) starts to descend, the spline hole positioning insert core (5) also descends, the spline hole positioning insert core (5) is inserted into the spline bottom hole of the workpiece, the positioning flange (10) abuts against the upper end face of the workpiece, and the clamping and positioning of the workpiece are completed; S3, the ear hole insert core (9) is inserted into the limiting hole of the limiting block (13) by holding the holding rod (14), and continues to advance, if the ear hole insert core (9) can smoothly penetrate through the two ear holes of the workpiece and pass through the limiting hole of the limiting block (13) on the other side, it proves that the position degree of the spline bottom hole of the workpiece relative to the yoke end face, the ear hole and the inner end face is qualified; if it cannot pass through smoothly, it means that the position degree is unqualified.

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