Steering knuckle ear taper hole key groove angle detection positioning tool

Abstract

The utility model discloses a kind of knuckle ear taper hole key groove angle detection positioning tool, it includes seat and first positioning mechanism;The first positioning mechanism includes positioning rod and locating block, the positioning rod is horizontally laid out, and has sequentially connected installation section and positioning section, the installation section is detachably fixed with the seat, the positioning section is conical structure, and its taper is same with the taper of knuckle's taper hole, the positioning section is used to slidingly insert into the taper hole of knuckle, to limit the radial movement of knuckle along the positioning rod.The beneficial effects of the utility model are: using this knuckle ear taper hole key groove angle detection positioning tool to position knuckle, the depth direction of key groove can be vertical, so that the detection of the included angle a between the depth direction of key groove and the axial direction of shaft neck is converted into the detection of the included angle between the axial direction of shaft neck and horizontal plane, solve industry problem, improve detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of steering knuckle detection technology, and in particular to a positioning fixture for detecting and positioning the angle of the keyway in the cone hole of the steering knuckle ear. Background Technology

[0002] The steering knuckle is a crucial component of the automotive steering axle, enabling stable vehicle movement and sensitive directional transmission. Its function is to transmit and bear the load from the front of the vehicle, supporting and driving the front wheels to rotate around the kingpin, thus steering the vehicle. During vehicle operation, it withstands varying impact loads. As shown in Figures 1-2, a conventional steering knuckle 100 includes a disc body 110, a first fork lug 120, a second fork lug 130, and a journal 140. The disc body 110 has a front side 111 and a back side 112, and also has opposing first and second sides 113 and 114. The first fork lug 120 is located on the front side 111 of the disc body 110 and close to the first side side 113. The first fork lug 120 is fixedly connected to the front side 111 of the disc body 110, and a cone-shaped portion is formed on the first fork lug 120. The conical hole 121 has a keyway 1211 extending along its length on its inner wall. The second fork lug 130 is disposed on the front side 111 of the disc body 110 and close to the second side 114 of the disc body 110. The second fork lug 130 is fixedly connected to the front side 111 of the disc body 110. The journal 140 is disposed on the back side 112 of the disc body 110, and one end of the journal 140 is fixedly connected to the back side 112 of the disc body 110. The central axis of the journal 140 is perpendicular to the central axis of the conical hole 121.

[0003] The tapered hole of the steering knuckle described above is used to connect with the steering knuckle arm. After the tapered hole is machined, a keyway is machined on the inner wall of the tapered hole. It is necessary to ensure that the depth direction of the keyway forms a specific angle α with the axis of the journal, i.e., the positional accuracy of the keyway. Since the positional accuracy of the keyway has a significant impact on the steering knuckle arm's deflection angle, the specific angle α between the depth direction of the keyway and the axis of the journal is one of the important standards for this steering knuckle. After machining the keyway on the inner wall of the tapered hole, the angle α between the depth direction of the keyway and the axis of the journal needs to be checked. Generally, the following two methods are used: 1. Directly using a coordinate measuring machine (CMM). However, because the keyway of some steering knuckles is too narrow, the probe cannot collect enough points on the bottom surface of the keyway to construct a surface; 2. Indirectly using a CMM. First, a clamping plate is inserted into the keyway of the steering knuckle, which extends the two sides of the keyway, and then the CMM is used for measurement. However, because the keyway of some steering knuckles is too shallow, the contact area between the two is too small, and the clamping plate wobbles left and right after being inserted into the keyway, resulting in inaccurate measurement results. Therefore, it is urgent to design a steering knuckle ear tapered hole keyway angle detection and positioning fixture to position the steering knuckle when detecting the angle α between the depth direction of the keyway and the axis direction of the journal, so as to facilitate the detection of the angle α between the depth direction of the keyway and the axis direction of the journal using a three-coordinate measuring machine, and improve the detection accuracy. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a positioning fixture for detecting the angle of the keyway in the taper hole of the steering knuckle. This solves the technical problem in the prior art where the keyway of some steering knuckles is too narrow or too shallow, making it impossible to directly use coordinate measuring machine (CMM) to detect the angle α between the depth direction of the keyway and the axis direction of the journal, and the accuracy is poor when indirectly using CMM to detect the angle α between the depth direction of the keyway and the axis direction of the journal.

[0005] To achieve the above technical objectives, the present invention provides a tooling for detecting and positioning the angle of the keyway in the taper hole of a steering knuckle, comprising: seat body; The first positioning mechanism includes a positioning rod and a positioning block. The positioning rod is horizontally arranged and has an installation section and a positioning section connected in sequence. The installation section is detachably fixedly connected to the base body. The positioning section has a conical structure, and its taper is the same as the taper of the conical hole of the steering knuckle. The positioning section is used to slide into the conical hole of the steering knuckle to limit the radial movement of the steering knuckle along the positioning rod. The positioning block is fixedly connected to the positioning section and is used to slide into the keyway of the conical hole to limit the rotation of the steering knuckle around the positioning rod and to make the depth direction of the keyway vertical.

[0006] Furthermore, the base has a semi-circular structure with an open end, which is a placement channel. The axis of the placement channel extends horizontally, and the end of the mounting section away from the positioning section is built into the placement channel.

[0007] Furthermore, the steering knuckle ear cone hole keyway angle detection and positioning fixture also includes a connecting mechanism, which is detachably and fixedly connected to the base and the mounting section.

[0008] Furthermore, the connecting mechanism includes a rod and a clamping member. The rod is vertically arranged, and the bottom of the rod is fixedly connected to the bottom of the placement channel. The mounting section has a through hole and is slidably sleeved on the rod through the through hole. The clamping member is located above the mounting section and is detachably fixedly connected to the rod to clamp or loosen the mounting section.

[0009] Furthermore, the rod body is a screw, the clamping member is a nut, the nut is sleeved on the screw and screwed to the screw.

[0010] Furthermore, the steering knuckle ear tapered hole keyway angle detection and positioning fixture also includes a second positioning mechanism. The second positioning mechanism is fixedly connected to the end of the positioning section away from the mounting section and is used to abut or separate from the side where the small hole end of the tapered hole is located, so as to limit the axial movement of the steering knuckle along the positioning rod.

[0011] Furthermore, the second positioning mechanism includes a sleeve, multiple abutment blocks, and a driving assembly. One end of the sleeve is coaxially and fixedly connected to the end of the positioning section away from the mounting section. Multiple through grooves, each communicating with the inner cavity of the sleeve, are provided on the arc-shaped wall of the sleeve. Each abutment block slides through each through groove to enclose an annular abutment area. The driving assembly is connected to each abutment block to drive each abutment block to retract or separate from each other, thereby adjusting the diameter of the abutment area and making the diameter of the abutment area greater than or less than the diameter of the small end of the conical hole.

[0012] Furthermore, the outer end of the abutment block has a slope extending axially along the sleeve, with the lower end of the slope away from the positioning section and the upper end of the slope close to the positioning section.

[0013] Furthermore, the drive assembly includes a push shaft, an elastic element, and multiple connecting rods. The push shaft is coaxially arranged with the sleeve, one end of the push shaft is built into the sleeve, and the other end of the push shaft slides through the other end of the sleeve and extends out of the sleeve. Each of the connecting rods is built into the sleeve, and one end of each connecting rod is hinged to the push shaft. The other end of each connecting rod is hinged to the inner end of each abutment block, so as to convert the axial movement of the push shaft along the sleeve into the mutual closing or separation of the abutment blocks. When the push shaft reaches the first position, the abutment area reaches its maximum diameter. When the push shaft reaches the second position, the abutment area reaches its minimum diameter. The elastic element is built into the sleeve and connects the sleeve and the push shaft so that the push shaft reaches the first position.

[0014] Furthermore, the steering knuckle ear tapered hole keyway angle detection and positioning fixture also includes a support mechanism, which is disposed on the side of the positioning section and is used to support the second fork ear and journal of the steering knuckle.

[0015] Compared with the prior art, the beneficial effects of this utility model include: In use, the conical hole of the steering knuckle is slidably fitted onto the positioning section along its large end until the small end of the conical hole is in contact with the positioning section. This allows the positioning section to limit the radial movement of the steering knuckle along the positioning rod. Simultaneously, it ensures that the positioning block can slide into the keyway of the conical hole, thereby limiting the rotation of the steering knuckle around the positioning rod and ensuring the depth direction of the keyway is vertical. Then, a coordinate measuring machine (CMM) is used to detect the angle between the axis of the journal and the horizontal plane. Once the angle between the axis of the journal and the horizontal plane is detected, the angle α between the depth direction of the keyway and the axis of the journal can be calculated. Using this steering knuckle ear conical hole keyway angle detection and positioning fixture to position the steering knuckle ensures the depth direction of the keyway is vertical, thus transforming the detection of the angle α between the depth direction of the keyway and the axis of the journal into the detection of the angle between the axis of the journal and the horizontal plane, solving an industry problem and improving detection accuracy. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of an existing steering knuckle; Figure 2 This is a schematic diagram of the existing steering knuckle; Figure 3 This is a three-dimensional structural schematic diagram of a steering knuckle ear cone hole keyway angle detection and positioning fixture provided by this utility model; Figure 4 This is a cross-sectional view of the push shaft in the second positioning mechanism provided by this utility model when it reaches the first position; Figure 5 This is a cross-sectional view of the push shaft in the second positioning mechanism provided by this utility model when it reaches the second position; In the diagram: 100 – Steering knuckle, 110 – Disc, 111 – Front, 112 – Back, 113 – First side, 114 – Second side, 120 – First fork lug, 121 – Tapered hole, 1211 – Keyway, 130 – Second fork lug, 140 – Journal, 200 – Seat, 210 – Placement channel, 300 – First positioning mechanism, 310 – Positioning rod, 311 – Mounting section, 312 – Positioning section 320 - Positioning block, 400 - Connecting mechanism, 410 - Rod, 420 - Clamping component, 500 - Second positioning mechanism, 510 - Sleeve, 511 - Through groove, 520 - Abutting block, 521 - Inclined surface, 530 - Drive assembly, 531 - Push shaft, 532 - Elastic component, 533 - Connecting rod, 600 - Support mechanism, 610 - First support component, 620 - Second support component, 700 - Platform. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] This utility model provides a tooling for detecting and positioning the angle of the keyway in the tapered hole of a steering knuckle, the structure of which is as follows: Figure 3 - Figure 5 As shown, the system includes a base 200 and a first positioning mechanism 300. The first positioning mechanism 300 includes a positioning rod 310 and a positioning block 320. The positioning rod 310 is horizontally arranged and has an installation section 311 and a positioning section 312 connected in sequence. The installation section 311 is detachably fixedly connected to the base 200. The positioning section 312 has a conical structure, and its taper is the same as the taper of the conical hole 121 of the steering knuckle 100. The positioning section 312 is used to slide into the conical hole 121 of the steering knuckle 100 to limit the radial movement of the steering knuckle 100 along the positioning rod 310. The positioning block 320 is fixedly connected to the positioning section 312 and is used to slide into the keyway 1211 of the conical hole 121 to limit the rotation of the steering knuckle 100 around the positioning rod 310 and to make the depth direction of the keyway 1211 vertical.

[0019] In use, the conical hole 121 of the steering knuckle 100 is slidably fitted onto the positioning section 312 along its large end until the small end of the conical hole 121 is in contact with the positioning section 312. This allows the positioning section 312 to limit the radial movement of the steering knuckle 100 along the positioning rod 310. Simultaneously, the positioning block 320 is slidably inserted into the keyway 1211 of the conical hole 121, thus limiting the rotation of the steering knuckle 100 around the positioning rod 310 and ensuring the depth direction of the keyway 1211 is vertical. Then, a coordinate measuring machine (CMM) is used for measurement. The angle between the axis of journal 140 and the horizontal plane is measured. Once the angle between the axis of journal 140 and the horizontal plane is detected, the angle α between the depth direction of keyway 1211 and the axis of journal 140 can be calculated. By using this steering knuckle ear tapered hole keyway angle detection and positioning fixture to position the steering knuckle 100, the depth direction of keyway 1211 can be made vertical. Thus, the detection of the angle α between the depth direction of keyway 1211 and the axis of journal 140 is transformed into the detection of the angle between the axis of journal 140 and the horizontal plane, solving an industry problem and improving detection accuracy.

[0020] As a preferred embodiment, please refer to Figure 3 The base 200 has a semi-circular structure with one end open, which is a placement channel 210. The axis of the placement channel 210 extends horizontally. The end of the mounting section 311 away from the positioning section 312 is built into the placement channel 210. The placement channel 210 can accommodate the mounting section 311 and improve the connection strength between the mounting section 311 and the base 200.

[0021] As a preferred embodiment, please refer to Figure 3 The steering knuckle ear cone hole keyway angle detection and positioning fixture further includes a connecting mechanism 400, which is detachably and fixedly connected to the seat 200 and the mounting section 311, thereby realizing the connection between the mounting section 311 and the seat 200 and making the connection between the mounting section 311 and the seat 200 detachable.

[0022] As a preferred embodiment, please refer to Figure 3The connecting mechanism 400 includes a rod 410 and a clamping member 420. The rod 410 is vertically arranged, and its bottom is fixedly connected to the bottom of the placement channel 210. The mounting section 311 has a through hole and is slidably sleeved on the rod 410 through the through hole. The clamping member 420 is disposed above the mounting section 311 and is detachably fixedly connected to the rod 410 to clamp or loosen the mounting section 311. The connection between the mounting section 311 and the seat 200 is detachable, which facilitates the replacement of the first positioning mechanism 300.

[0023] As a preferred embodiment, please refer to Figure 3 The rod 410 is a screw, and the clamping member 420 is a nut. The nut is sleeved on the screw and screwed to it. When it is necessary to disassemble or assemble the mounting section 311, the nut is unscrewed from the screw, and the mounting section 311 is removed from the rod 410, or the mounting section 311 is sleeved on the rod 410. After the mounting section 311 is sleeved on the rod 410, the nut is screwed to the screw until the bottom of the nut presses the mounting section 311. This allows for the disassembly and assembly of the mounting section 311, and the operation is simple.

[0024] As a preferred embodiment, please refer to Figure 3 The connecting mechanism 400 includes multiple mechanisms, and each connecting mechanism 400 is arranged at intervals along the length direction of the placement channel 210, which can improve the connection strength of the installation section 311.

[0025] As a preferred embodiment, please refer to Figure 3 and Figure 4 The steering knuckle ear tapered hole keyway angle detection and positioning fixture further includes a second positioning mechanism 500. The second positioning mechanism 500 is fixedly connected to the end of the positioning section 312 away from the mounting section 311, and is used to abut or separate from the side where the small hole end of the tapered hole 121 is located, so as to limit the axial movement of the steering knuckle 100 along the positioning rod 310, which can prevent the steering knuckle 100 from moving axially along the positioning rod 310, and further improve the detection accuracy of the angle between the axis direction of the journal 140 and the horizontal plane.

[0026] As a preferred embodiment, please refer to Figure 4 and Figure 5The second positioning mechanism 500 includes a sleeve 510, multiple abutment blocks 520, and a drive assembly 530. One end of the sleeve 510 is coaxially and fixedly connected to the end of the positioning section 312 away from the mounting section 311. Multiple through grooves 511, each communicating with the inner cavity of the sleeve 510, are formed on the arc-shaped wall of the sleeve 510. Each abutment block 520 slides through each through groove 511 to form an annular abutment area. The drive assembly 530 is connected to each abutment block 520 to drive the abutment blocks 520 to retract or separate, thereby adjusting the diameter of the abutment area and ensuring that the diameter of the abutment area is greater than or less than the small diameter of the conical hole 121. The diameter of the hole end is adjusted during use by manipulating the drive assembly 530, which drives each of the abutment blocks 520 to retract towards each other. This adjusts the diameter of the abutment area to be smaller than the diameter of the small hole end of the conical hole 121. Then, the conical hole 121 of the steering knuckle 100 is slidably fitted onto the positioning section 312 along its large hole end until the small hole end of the conical hole 121 is in contact with the positioning section 312. This allows the positioning section 312 to limit the radial movement of the steering knuckle 100 along the positioning rod 310. Simultaneously, it ensures that the positioning block 320 can slide into the keyway 1211 of the conical hole 121, thereby allowing the positioning block 320 to control the radial movement of the steering knuckle 100 along the positioning rod 310. The steering knuckle 100 is limited in its rotation around the positioning rod 310, and the depth direction of the keyway 1211 is vertical. Then, by manipulating the drive assembly 530, the abutment blocks 520 are driven to separate from each other. The diameter of the abutment area can be adjusted to be larger than the diameter of the small hole end of the tapered hole 121. Each abutment block 520 can abut against the side where the small hole end of the tapered hole 121 is located, thereby limiting the axial movement of the steering knuckle 100 along the positioning rod 310 and preventing further axial movement. Finally, a coordinate measuring machine (CMM) is used to measure the distance between the axis of the journal 140 and the horizontal plane. Angle detection is performed. When the angle between the axis of journal 140 and the horizontal plane is detected, the angle α between the depth direction of keyway 1211 and the axis of journal 140 can be calculated. When removing steering knuckle 100, by manipulating the drive assembly 530, the drive assembly 530 drives each abutment block 520 to retract towards each other. The diameter of the abutment area can be adjusted so that the diameter of the abutment area is smaller than the diameter of the small hole end of the tapered hole 121. Each abutment block 520 can separate from the side where the small hole end of the tapered hole 121 is located, thereby releasing the restriction on the axial movement of steering knuckle 100 along the positioning rod 310, and the shaft hole of steering knuckle 100 can be removed from the positioning section 312.

[0027] As a preferred embodiment, please refer to Figure 4 and Figure 5 The outer end of the abutment block 520 has an inclined surface 521 extending axially along the sleeve 510, and the lower end of the inclined surface 521 is far away from the positioning section 312, while the upper end of the inclined surface 521 is close to the positioning section 312. When the tapered hole 121 of the steering knuckle 100 is slidably fitted onto the positioning section 312 along its own large hole end, it can slide along each of the inclined surfaces 521 from the lower end to the upper end.

[0028] As a preferred embodiment, please refer to Figure 4 and Figure 5The drive assembly 530 includes a push shaft 531, an elastic element 532, and multiple connecting rods 533. The push shaft 531 is coaxially arranged with the sleeve 510. One end of the push shaft 531 is built into the sleeve 510, and the other end of the push shaft 531 slides through the other end of the sleeve 510 and extends out of the sleeve 510. Each of the connecting rods 533 is built into the sleeve 510, and one end of each connecting rod 533 is hinged to the push shaft 531. The other end of each connecting rod 533 is hinged to the inner end of each abutment block 520, so as to convert the axial movement of the push shaft 531 along the sleeve 510 into the mutual closing or separation of the abutment blocks 520. When the push shaft 531 reaches the first position, the abutment area reaches its maximum diameter. When the push shaft 531 reaches the second position, the abutment area reaches its minimum diameter. The elastic element 532 is built into the sleeve 510 and connects the sleeve 510 and the push shaft 531, so that when the push shaft 531 reaches the first position, the tapered hole 121 of the steering knuckle 100 slides along its large end onto the positioning section 312. The tapered hole 121 can slide along the inclined surface 521 of each abutment block 520 from the lower end to the upper end, and squeeze each abutment block 520, so that each abutment block 520 retracts into each other. Under the transmission action of each connecting rod 533, the push shaft 531 moves along the sleeve... The axial movement of the sleeve 510 reaches the second position, where the abutment area reaches its minimum diameter. Without manual operation of the push shaft 531, the abutment blocks 520 can retract into each other solely through the compression of the conical hole 121 of the steering knuckle 100. During this process, the elastic element 532 is compressed, accumulating compressive elastic potential energy. When the small end of the conical hole 121 aligns with the positioning section 312, the conical hole 121 passes over each abutment block 520, and the elastic element 532 releases its compressive elastic potential energy, driving the push shaft 531 to move axially along the sleeve 510 and reach the first position. Under the transmission action of the connecting rods 533, the abutment blocks 520 separate from each other, and the abutment area reaches its maximum diameter. Each of the abutment blocks 520 can abut against the side where the small hole end of the tapered hole 121 is located, thereby limiting the axial movement of the steering knuckle 100 along the positioning rod 310. When the steering knuckle 100 is removed, the push shaft 531 is pressed, driving the push shaft 531 to move axially along the sleeve 510 and reach the second position. Under the transmission action of each of the connecting rods 533, the abutment blocks 520 retract towards each other, and the abutment area reaches its minimum diameter. Each of the abutment blocks 520 can separate from the side where the small hole end of the tapered hole 121 is located, thereby releasing the limitation on the axial movement of the steering knuckle 100 along the positioning rod 310, and the shaft hole of the steering knuckle 100 can be removed from the positioning section 312.The contact and separation operations of each of the abutment blocks 520 and the side where the small hole end of the conical hole 121 is located are simple, enabling the abutment block 520 to quickly position the steering knuckle 100.

[0029] As a preferred embodiment, please refer to Figure 4 and Figure 5 The elastic element 532 is a spring that can accumulate compressive elastic potential energy when subjected to pressure, and release the compressive elastic potential energy when the pressure is removed, thereby achieving reset.

[0030] As a preferred embodiment, please refer to Figure 3 The steering knuckle ear tapered hole keyway angle detection and positioning fixture further includes a support mechanism 600. The support mechanism 600 is disposed on the side of the positioning section 312 and is used to support the second fork ear 130 and journal 140 of the steering knuckle 100. It can provide load-bearing force to the steering knuckle 100, thereby dispersing the weight of the steering knuckle 100 and preventing the entire weight of the steering knuckle 100 from acting on the positioning rod 310, thus improving the service life of the positioning rod 310.

[0031] As a preferred embodiment, please refer to Figure 3 The support mechanism 600 includes a first support member 610 and a second support member 620. The first support member 610 is disposed on one side of the positioning section 312 and is used to support the second fork lug 130. The second support member 620 is disposed on the other side of the positioning section 312 and is used to support the journal 140, which can improve the support effect on the steering knuckle 100.

[0032] As a preferred embodiment, please refer to Figure 3 The first support member 610 is a first support shaft, and the top of the first support shaft is used to support the second fork lug 130 to provide support force to the second fork lug 130.

[0033] As a preferred embodiment, please refer to Figure 3 The second support member 620 is a second support shaft, and the top of the second support shaft is used to support the journal 140 to provide support force to the journal 140.

[0034] As a preferred embodiment, please refer to Figure 3 The steering knuckle ear cone hole keyway angle detection and positioning fixture further includes a platform 700, the bottom of the seat 200 is fixedly connected to the platform 700, the bottom of the first support shaft is fixedly connected to the platform 700, and the bottom of the second support shaft is fixedly connected to the platform 700.

[0035] To better understand this utility model, the following is combined with... Figure 1 - Figure 5The working principle of the technical solution of this utility model will be described in detail below: In use, when the conical hole 121 of the steering knuckle 100 is slidably fitted onto the positioning section 312 along its large end, the conical hole 121 can slide from the lower end to the upper end along the inclined surface 521 of each abutment block 520, pressing each abutment block 520 so that the abutment blocks 520 retract into each other. Under the transmission action of each connecting rod 533, the push shaft 531 moves axially along the sleeve 510 and reaches the second position, where the abutment area reaches its minimum diameter. No manual operation of the push shaft 531 is required; the retraction of each abutment block 520 can be achieved solely by the pressing action of the conical hole 121 of the steering knuckle 100. During this process, the elastic element 532 is compressed and accumulates compression. The elastic potential energy, when the small end of the conical hole 121 is in contact with the positioning section 312, can limit the radial movement of the steering knuckle 100 along the positioning rod 310 through the positioning section 312. At the same time, it ensures that the positioning block 320 can slide into the keyway 1211 of the conical hole 121, thereby limiting the rotation of the steering knuckle 100 around the positioning rod 310 through the positioning block 320, and making the depth direction of the keyway 1211 vertical. In addition, the conical hole 121 will pass over each of the abutment blocks 520, and the elastic element 532 releases the compressive elastic potential energy, driving the push shaft 531 to move axially along the sleeve 510 and reach the first position, under the transmission action of each of the connecting rods 533. Below, each of the abutment blocks 520 separates from each other, the abutment area reaches its maximum diameter, and each of the abutment blocks 520 can abut against the side where the small hole end of the tapered hole 121 is located, thereby limiting the axial movement of the steering knuckle 100 along the positioning rod 310. Then, a three-coordinate measuring machine is used to detect the angle between the axial direction of the journal 140 and the horizontal plane. When the angle between the axial direction of the journal 140 and the horizontal plane is detected, the angle α between the depth direction of the keyway 1211 and the axial direction of the journal 140 can be calculated. When the steering knuckle 100 is removed, the push shaft 531 is pressed, driving the push shaft 531 to move axially along the sleeve 510 and reach the second position. Under the transmission action of each connecting rod 533, each abutment block 520 retracts towards each other, and the abutment area reaches its minimum diameter. Each abutment block 520 can separate from the side where the small hole end of the tapered hole 121 is located, thereby releasing the restriction on the axial movement of the steering knuckle 100 along the positioning rod 310. The shaft hole of the steering knuckle 100 can then be removed from the positioning section 312. The abutment and separation operation of each abutment block 520 from the side where the small hole end of the tapered hole 121 is located is simple, enabling rapid positioning of the steering knuckle 100 by the abutment blocks 520. Using this steering knuckle ear tapered hole keyway angle detection and positioning fixture to position the steering knuckle 100 ensures that the depth direction of the keyway 1211 is vertical.This transforms the detection of the angle α between the depth direction of the keyway 1211 and the axial direction of the journal 140 into the detection of the angle between the axial direction of the journal 140 and the horizontal plane, solving an industry problem and improving detection accuracy.

[0036] The steering knuckle ear cone hole keyway angle detection and positioning fixture provided by this utility model has the following beneficial effects: (1) When the tapered hole 121 of the steering knuckle 100 is slidably sleeved on the positioning section 312 along its own large hole end, it can slide from the lower end to the upper end along the inclined surface 521 of each of the abutment blocks 520 and squeeze each of the abutment blocks 520, so that each of the abutment blocks 520 retracts into each other. Under the transmission action of each of the connecting rods 533, the push shaft 531 moves along the axial direction of the sleeve 510 and reaches the second position. The abutment area reaches the minimum diameter. There is no need to manually operate the push shaft 531. The retraction of each of the abutment blocks 520 can be achieved by the squeezing of the tapered hole 121 of the steering knuckle 100. (2) The contact and separation operations of each of the abutting blocks 520 and the small hole end of the cone hole 121 are simple, and the abutting block 520 can quickly position the steering knuckle 100. (3) The steering knuckle 100 is positioned by using the steering knuckle ear tapered hole keyway angle detection and positioning fixture, which can make the depth direction of the keyway 1211 vertical. This transforms the detection of the angle α between the depth direction of the keyway 1211 and the axial direction of the journal 140 into the detection of the angle between the axial direction of the journal 140 and the horizontal plane, thus solving the industry problem and improving the detection accuracy.

[0037] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A tooling for detecting and positioning the angle of the keyway in the cone hole of a steering knuckle, characterized in that, include: seat body; The first positioning mechanism includes a positioning rod and a positioning block. The positioning rod is horizontally arranged and has an installation section and a positioning section connected in sequence. The installation section is detachably fixedly connected to the base body. The positioning section has a conical structure, and its taper is the same as the taper of the conical hole of the steering knuckle. The positioning section is used to slide into the conical hole of the steering knuckle to limit the radial movement of the steering knuckle along the positioning rod. The positioning block is fixedly connected to the positioning section and is used to slide into the keyway of the conical hole to limit the rotation of the steering knuckle around the positioning rod and to make the depth direction of the keyway vertical.

2. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 1, characterized in that, The base has a semi-circular structure with an open end, which is a placement channel. The axis of the placement channel extends horizontally, and the end of the mounting section away from the positioning section is built into the placement channel.

3. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 2, characterized in that, It also includes a connecting mechanism that can be detachably and fixedly connected to the base and the mounting section.

4. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 3, characterized in that, The connecting mechanism includes a rod and a clamping member. The rod is vertically arranged and its bottom is fixedly connected to the bottom of the placement channel. The mounting section has a through hole and is slidably fitted onto the rod through the through hole. The clamping member is located above the mounting section and is detachably fixedly connected to the rod to clamp or loosen the mounting section.

5. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 4, characterized in that, The rod body is a screw, and the clamping element is a nut. The nut is sleeved on the screw and screwed to the screw.

6. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 1, characterized in that, It also includes a second positioning mechanism, which is fixedly connected to the end of the positioning section away from the mounting section and is used to abut or separate from the side where the small hole end of the tapered hole is located, so as to limit the axial movement of the steering knuckle along the positioning rod.

7. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 6, characterized in that, The second positioning mechanism includes a sleeve, multiple abutment blocks, and a driving assembly. One end of the sleeve is coaxially and fixedly connected to the end of the positioning section away from the mounting section. Multiple through grooves, each communicating with the inner cavity of the sleeve, are provided on the arc-shaped wall of the sleeve. Each abutment block slides through each through groove to enclose an annular abutment area. The driving assembly is connected to each abutment block to drive the abutment blocks to retract or separate from each other, thereby adjusting the diameter of the abutment area and making the diameter of the abutment area greater than or less than the diameter of the small end of the conical hole.

8. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 7, characterized in that, The outer end of the abutment block has an inclined surface extending axially along the sleeve, with the lower end of the inclined surface away from the positioning section and the upper end of the inclined surface close to the positioning section.

9. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 7, characterized in that, The drive assembly includes a push shaft, an elastic element, and multiple connecting rods. The push shaft is coaxially arranged with the sleeve. One end of the push shaft is built into the sleeve, and the other end of the push shaft slides through the other end of the sleeve and extends out of the sleeve. Each connecting rod is built into the sleeve, and one end of each connecting rod is hinged to the push shaft. The other end of each connecting rod is hinged to the inner end of each abutment block, so as to convert the axial movement of the push shaft along the sleeve into the mutual closing or separation of the abutment blocks. When the push shaft reaches the first position, the abutment area reaches its maximum diameter. When the push shaft reaches the second position, the abutment area reaches its minimum diameter. The elastic element is built into the sleeve and connects the sleeve and the push shaft so that the push shaft reaches the first position.

10. The steering knuckle ear tapered hole keyway angle detection and positioning fixture according to claim 1, characterized in that, It also includes a support mechanism located on the side of the positioning section and used to support the second fork lug and journal of the steering knuckle.

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