A kind of fixture for machining lock pin hole of automobile front axle

Abstract

The present application discloses a fixture for machining lock pin holes of automobile front axles, which relates to the field of automobile parts machining fixtures, and includes a base, wherein the base is provided with a support, a pressing mechanism and a side positioning member, wherein the support is used to support the front axle workpiece, and the pressing mechanism is used to apply downward pressure to the front axle workpiece; the side positioning members are provided with two, and are respectively located at the two ends of the base along the length direction, and the two side positioning members are used to respectively correspond to the two ends of the front axle workpiece; the base includes a bottom plate and a seat plate, one end of the seat plate is hinged with one end of the bottom plate, a wedge-shaped pad is provided between the seat plate and the bottom plate, the wedge-shaped pad forms static friction with the bottom plate and the seat plate respectively, and a first fastener is detachably connected between the bottom plate and the seat plate. The present application can improve the scope of application of the fixture for machining lock pin holes of automobile front axles.

Description

Technical Field

[0001] The present application relates to the field of automobile parts processing fixtures, and in particular to a automobile front axle lock pin hole processing fixture. Background Art

[0002] The steering axle is an important part of a car or other vehicle, and is mainly responsible for the steering function of the vehicle. The steering axle is usually composed of four main parts, namely the front axle, kingpin, steering knuckle and wheel hub. These four parts work together to enable the vehicle to complete the steering operation smoothly and stably.

[0003] There are locking pin holes at both ends of the front axle of the car, and the locking pin holes at both ends of the front axle have an inclination angle. When machining the locking pin hole on the front axle workpiece, the front axle workpiece is fixed with a fixture, and the inclination angle of the front axle workpiece in the clamping state is set according to the inclination angle of the locking pin hole, so as to facilitate vertical downward drilling of the locking pin hole, which is conducive to controlling the inclination angle accuracy of the locking pin hole. Since the inclination angles of the front axles of cars of different specifications are different, it is usually necessary to set up different fixtures, and the adaptability of the fixture is poor and needs to be improved. Summary of the invention

[0004] In order to improve the application scope of the locking pin hole processing fixture of the front axle of an automobile, the present application provides a locking pin hole processing fixture of the front axle of an automobile.

[0005] The present application provides a front axle lock pin hole machining fixture for an automobile, which adopts the following technical solution:

[0006] A fixture for machining locking pin holes of automobile front axles, comprising a base, the base being provided with a supporting member, a pressing mechanism and a side positioning member, the supporting member being used to support a front axle workpiece, the pressing mechanism being used to apply downward pressure to the front axle workpiece; two side positioning members are provided, and are respectively located at the two ends of the base along the length direction, the two side positioning members being used to respectively correspond to abut against the two ends of the front axle workpiece; the base comprising a bottom plate and a seat plate, one end of the seat plate being hinged to one end of the bottom plate, a wedge-shaped pad being provided between the seat plate and the bottom plate, the wedge-shaped pad forming static friction with the bottom plate and the seat plate respectively, and a first fastener being detachably connected between the bottom plate and the seat plate.

[0007] By adopting the above technical solution, when processing the front axle workpiece, the fixture is clamped on the processing platform of the machine tool to fix the front axle workpiece. The front axle workpiece is installed above the seat plate through the support, the pressing mechanism and the side positioning member. The support and the pressing mechanism clamp the front axle workpiece together, and the two side positioning members jointly limit the position of the front axle workpiece along the length direction of the base. The lower surface of the base plate serves as the mounting surface of the fixture. The seat plate and the base plate are hinged to each other and separated by a wedge-shaped pad, so that the seat plate and the base plate maintain an inclination angle that is adapted to the inner inclination angle of the lock pin hole, so that the drilling tool can drill the lock pin hole vertically downward. After the lock pin hole at one end of the front axle workpiece is processed, the pressing mechanism and the side positioning member are loosened, and then the front axle workpiece is turned around and re-clamped to perform drilling processing on the lock pin hole at the other end. By changing different wedge-shaped pads, the relative angle between the seat plate and the base plate can be changed to adapt to front axle workpieces of different specifications, which is more convenient.

[0008] Optionally, the side positioning member is detachably connected to the seat plate via a group of second fasteners, threaded connection holes are symmetrically provided at both ends of the seat plate, and multiple groups of threaded connection holes are provided at each end of the seat plate, and each group of threaded connection holes is respectively connected to a group of the second fasteners.

[0009] By adopting the above technical solution, when the second fasteners of the two side positioning members are connected to the threaded connection holes at different positions, the distance between the two side positioning members changes, so that the fixture can adapt to front axle workpieces of different length specifications.

[0010] Optionally, a sliding block is provided on the bottom surface of the side positioning member, and a sliding groove is provided on the upper surface of the seat plate, and the sliding block is slidingly connected to the sliding groove; the seat plate is rotatably connected to a double-headed screw, and the thread rotation directions of the external threads at both ends of the double-headed screw are opposite, and the two ends of the double-headed screw are respectively threadedly connected to the two side positioning members; the side positioning member is provided with a through hole for passing the second fastener, and the second fastener is clearance-matched with the through hole.

[0011] By adopting the above technical solution, when the front axle workpiece is positioned by using two side positioning members, the second fasteners of the two side positioning members are firstly loosened, and then the double-headed screw is rotated to make the double-headed screw drive the two side positioning members to approach each other synchronously to clamp the front axle workpiece, and then the two side positioning members are locked by the second fastener. Using the double-headed screw to drive the two side positioning members to clamp the front axle workpiece is conducive to ensuring the relative position accuracy between the front axle workpiece and the seat plate.

[0012] Optionally, the side positioning member includes a side support seat and a positioning block, the positioning block is provided with an inner concave angle for abutting the end position of the front axle workpiece, the positioning block and the side support seat are slidingly connected along the length direction of the base, and the side support seat is provided with an adjusting bolt, and the adjusting bolt is used to drive the positioning block to move along the length direction of the seat plate.

[0013] By adopting the above technical solution, the adjusting bolt can drive the positioning block to approach the front axle workpiece, so that the inner concave angle of the positioning block presses against the end of the front axle workpiece, so that the front axle workpiece is positioned by the two side positioning members.

[0014] Optionally, the base plate is provided with a plurality of connecting columns, and the axes of the connecting columns are parallel to the bottom surface of the base plate; the outer peripheral surface of the connecting column includes an arc surface and a plane surface, the arc angle of the arc surface is greater than the straight angle, the bottom surface of the base plate is provided with a mounting groove for installing the connecting column, the mounting groove is a circular arc groove, the arc angle of the circular arc groove is greater than the arc angle of the arc surface, the first fastener is threadedly connected to the connecting column, the first fastener is perpendicular to the connecting column, the seat plate is provided with a first avoidance hole for avoiding the first fastener, and the upper surface of the base plate is provided with a second avoidance hole for avoiding the first fastener.

[0015] By adopting the above technical solution, the relative angle between the seat plate and the base plate can be changed by replacing different wedge-shaped pads; the seat plate and the base plate are connected by a first fastener, and the first fastener is threadedly connected to the connecting column on the base plate, and the connecting column can rotate in the installation groove, so that the first fastener can always remain perpendicular to the seat plate, thereby allowing the first fastener to form a good fixing effect on the seat plate.

[0016] Optionally, the pressing mechanism includes a scissors frame and a third fastener, the scissors frame includes two scissors arms cross-hinged to each other, a hinged rod is provided at one end of the scissors arm, the two hinged rods are commonly connected to a hinged seat, the third fastener is penetrated and connected to the hinged seat, the third fastener is threadedly connected to the seat plate, and a hook portion is provided at one end of the scissors arm away from the hinged rod, and the hook portions of the two scissors arms are used to clamp the wide wing edge of the front axle workpiece together.

[0017] By adopting the above technical solution, when the front axle workpiece is pressed by the downward pressing mechanism, the third fastener is screwed downwardly when the two hooks of the scissor frame hook the wide wing edge of the front axle workpiece at the same time, so that the third fastener drives the hinge seat close to the seat plate, so that the two hooks of the scissor frame clamp the front axle workpiece and exert downward pressure on the front axle workpiece. When disassembling the front axle workpiece, the third fastener is loosened, and the two scissor arms of the scissor frame are opened, so that the wide wing edge of the front axle workpiece can be disengaged from between the two hooks.

[0018] Optionally, the two scissor arms are commonly connected with a coil spring, and the coil spring is used to prevent the two scissor arms from opening to each other.

[0019] By adopting the above technical solution, the coil spring can keep the relative angle between the two scissor arms stable, so that when the front axle workpiece is pressed by the pressing mechanism, the two hooks of the scissor arms can keep hooking the wide wing edge of the front axle workpiece.

[0020] Optionally, the seat plate is detachably embedded with an internal threaded sleeve, and the internal threaded sleeve is used for threaded connection with the third fastener.

[0021] The fixture is used to position the front axle workpiece for machining of the front axle workpiece, and the front axle workpiece on the fixture needs to be replaced constantly. Accordingly, the third fastener of the pressing mechanism needs to repeatedly undergo the process of locking and loosening, so that the threaded meshing part between the third fastener and the seat plate is inevitably worn and slipped. By adopting the above technical solution, the internal thread sleeve is used in conjunction with the third fastener, and when the internal thread sleeve slips, it can be repaired by replacing the internal thread sleeve.

[0022] Optionally, a limiting flange is provided on the outer circumferential surface of the internal threaded sleeve, and the limiting flange is a polygon; the seat plate is provided with a mounting hole adapted to the internal threaded sleeve, and the mounting hole is provided with a countersunk hole adapted to the limiting flange, and the depth of the countersunk hole is greater than the thickness of the limiting flange; the outer circumferential surface of the internal threaded sleeve is a conical surface, the small end of the internal threaded sleeve faces upward, and the limiting flange is located at the large end of the internal threaded sleeve.

[0023] By adopting the above technical solution, the inner thread sleeve and the mounting hole are matched through the conical surface, so that the inner thread sleeve and the seat plate can form a close matching relationship as much as possible. The limiting flange of the inner thread sleeve is matched with the countersunk hole, and the limiting flange is set to be multi-deformable. The limiting flange and the countersunk hole are adapted so that the limiting flange and the countersunk hole can bear the torque when the third fastener is locked.

[0024] Optionally, the third fastener is a hexagon socket bolt, the bolt head sleeve of the hexagon socket bolt is provided with a rubber damping ring, and the rubber damping ring is in a tensioned and deformed state; the inner hole of the internal threaded sleeve includes a threaded section and a guide section, the guide section is located above the threaded section, and the guide section is clearance-matched with the hexagon socket bolt.

[0025] By adopting the above technical solution, the third fastener of the pressing mechanism needs to be repeatedly disassembled and assembled. When the third fastener is locked to the internal threaded sleeve, the guide section of the internal threaded sleeve can form a guiding effect on the third fastener, so that the third fastener can be engaged with the threaded section of the internal threaded sleeve more quickly. The third fastener is set as a hexagon socket bolt, so that the third fastener can be locked using an hexagon socket wrench. The operating space required for the hexagon socket wrench is small, and the operation is more convenient. In the process of locking the hexagon socket bolt, the hexagon socket bolt can be tightened by hand twisting to improve the efficiency of locking the hexagon socket bolt. By setting a rubber damping ring, it is beneficial to apply a larger torque to the hexagon socket bolt and reduce the wear of the hexagon socket bolt on the fingers.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The lower surface of the bottom plate of the fixture is used as the mounting surface of the fixture. The base plate and the bottom plate are hinged to each other and separated by a wedge-shaped pad, so that the base plate and the bottom plate maintain an inclination angle that is adapted to the inclination angle of the lock pin hole, so that the drilling tool can drill the lock pin hole vertically downward. By changing different wedge-shaped pads, the relative angle between the base plate and the bottom plate can be changed to adapt to front axle workpieces of different specifications, which is more convenient.

[0028] 2. The seat plate and the base plate are connected by a first fastener, which is threadedly connected to a connecting column on the base plate. The connecting column can rotate in the mounting groove so that the first fastener can always remain perpendicular to the seat plate, thereby enabling the first fastener to form a good fixing effect on the seat plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the automobile front axle lock pin hole processing fixture in Example 1 when in use.

[0030] Figure 2 It is a schematic diagram of the overall structure of the automobile front axle lock pin hole processing fixture of Example 1.

[0031] Figure 3 yes Figure 2 A magnified partial view of point A in the middle.

[0032] Figure 4 It is a cross-sectional view of Example 1 for reflecting the installation state of the internal threaded sleeve.

[0033] Figure 5 yes Figure 4 A magnified partial view of point B in the middle.

[0034] Figure 6 It is a schematic diagram of the automobile front axle lock pin hole processing fixture in Example 1 when in use.

[0035] Description of reference numerals:

[0036] 1. Base; 11. Bottom plate; 111. Mounting groove; 112. Second avoidance hole; 12. Seat plate; 121. First avoidance hole; 122. Threaded connection hole; 123. Sliding groove; 124. Positioning groove; 125. Limiting groove; 126. Mounting hole; 127. Countersunk hole; 13. Wedge-shaped pad; 131. Rubber strip; 14. First fastener; 15. Connecting column; 151. Arc surface; 152. Plane; 2. Support member; 21. Support rod; 3. Pressing mechanism; 31. Scissor frame; 311. Scissor arm; 3111, hook portion; 312, hinged rod; 313, hinged seat; 32, third fastener; 321, rubber damping ring; 33, coil spring; 4, side positioning member; 41, support seat; 411, sliding block; 4111, threaded hole; 42, positioning block; 421, inner concave angle; 43, second fastener; 44, adjusting bolt; 45, bolt mounting block; 5, double-headed screw; 51, annular protrusion; 511, socket; 6, internal threaded sleeve; 61, limiting flange; 62, threaded section; 63, guide section. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-6 This application is described in further detail.

[0038] Example 1

[0039] The present application embodiment discloses a fixture for machining a locking pin hole of a front axle of an automobile. Figure 1 The automobile front axle lock pin hole processing fixture includes a base 1, the base 1 is provided with a support member 2, a pressing mechanism 3 and a side positioning member 4, the support member 2 is used to support the front axle workpiece, and the pressing mechanism 3 is used to apply downward pressure to the front axle workpiece; there are two side positioning members 4, and they are respectively located at both ends of the base 1 along the length direction, and the two side positioning members 4 are used to respectively correspond to the two ends of the front axle workpiece.

[0040] Reference Figure 1 and Figure 2 The base 1 includes a bottom plate 11 and a seat plate 12, one end of the seat plate 12 is hinged to one end of the bottom plate 11, a wedge-shaped pad 13 is provided between the seat plate 12 and the bottom plate 11, the thickness direction of the wedge-shaped pad 13 is arranged along the width direction of the seat plate 12, and rubber strips 131 are embedded in the two inclined surfaces of the wedge-shaped pad 13. Under the action of the rubber strips 131, the wedge-shaped pad 13 forms static friction with the bottom plate 11 and the seat plate 12 respectively. The wedge-shaped pad 13 can keep the seat plate 12 and the bottom plate 11 relatively tilted, so that the kingpin hole of the front axle workpiece remains in a vertical state. By replacing different wedge-shaped pads 13, the fixture can adapt to kingpin holes with different tilt angles, and the bottom plate 11 and the seat plate 12 are detachably connected by a first fastener 14.

[0041] Reference Figure 1 and Figure 2 The bottom plate 11 is provided with four connecting columns 15, the axis of the connecting columns 15 is parallel to the bottom surface of the bottom plate 11 and perpendicular to the length direction of the bottom plate 11; the outer peripheral surface of the connecting column 15 includes an arc surface 151 and a plane 152, the arc angle of the arc surface 151 is greater than the straight angle, the bottom surface of the bottom plate 11 is provided with a mounting groove 111 for mounting the connecting column 15, the mounting groove 111 is an arc groove, the arc angle of the arc groove is greater than the arc angle of the arc surface 151, the first fastener 14 is threadedly connected to the connecting column 15, the first fastener 14 is perpendicular to the connecting column 15, the seat plate 12 is provided with a first avoidance hole 121 for avoiding the first fastener 14, the upper surface of the bottom plate 11 is provided with a second avoidance hole 112 for avoiding the first fastener 14, the first avoidance hole 121 and the second avoidance hole 112 are both waist-shaped holes, and the length direction of the second avoidance hole 112 is perpendicular to the length direction of the mounting groove 111.

[0042] The connecting column 15 can rotate in the installation groove 111 , so that the first fastener 14 can always remain perpendicular to the seat plate 12 , thereby enabling the first fastener 14 to form a good fixing effect on the seat plate 12 .

[0043] Reference Figure 2 The side positioning member 4 includes a side support seat 41 and a positioning block 42. The positioning block 42 is fixedly connected to the side support seat 41 by screws. The positioning block 42 is provided with an inner concave angle 421 for abutting the end position of the front axle workpiece. The inner concave angles 421 of the two positioning blocks 42 can limit the displacement of the axle main bridge along the length direction and the width direction of the seat plate 12. In addition, the end of the axle main bridge is usually an inclined arc surface 151 corresponding to the main pin hole, so that the inner concave angle 421 can prevent the end of the axle main bridge from warping upward.

[0044] The side support seat 41 is detachably connected to the seat plate 12 through a group of second fasteners 43, which are screws. The number of each group of second fasteners 43 is at least two. The side support seat 41 is provided with a through hole for penetrating the second fasteners 43, and the second fasteners 43 are clearance-matched with the through hole; the two ends of the seat plate 12 are symmetrically provided with threaded connection holes 122, and there are multiple groups of threaded connection holes 122 at each end of the seat plate 12, and each group of threaded connection holes 122 is respectively connected to a group of second fasteners 43. By making the second fasteners 43 of the side positioning member 4 match with different threaded connection holes 122, the spacing between the two side positioning members 4 can be changed to adapt to axle main bridges of different specifications.

[0045] Reference Figure 2The support member 2 is detachably connected to the seat plate 12 by screws, and the screw holes for mounting the support member 2 at each end of the seat plate 12 are arranged in multiple groups, so that the support member 2 can adapt to axle main bridges of different specifications. The upper end of the support member 2 is threadedly connected to two support rods 21, and the two support rods 21 are arranged at intervals along the width direction of the seat plate 12. The height of the support rods 21 can be adjusted to adapt to axle main bridges of different specifications.

[0046] Reference Figure 2 and Figure 3 A sliding block 411 is integrally provided on the bottom surface of the side positioning member 4, and the sliding block 411 is a dovetail structure. A sliding groove 123 adapted to the sliding block 411 is provided on the upper surface of the seat plate 12, and the sliding block 411 is slidingly connected to the sliding groove 123; the seat plate 12 is rotatably connected to the double-headed screw 5, and the thread rotation directions of the external threads at both ends of the double-headed screw 5 are opposite, and the two ends of the double-headed screw 5 are respectively connected to the threads of the two side positioning members 4, and the side positioning member 4 is provided with a threaded hole 4111 for the double-headed screw 5 to be threadedly connected, and the threaded hole 4111 is located on the sliding block 411.

[0047] The upper surface of the seat plate 12 is provided with a positioning groove 124 for avoiding the double-headed screw 5, and the two ends of the positioning groove 124 are respectively connected to the two sliding grooves 123. An annular protrusion 51 is provided in the middle section of the outer circumference of the double-headed screw 5, and a limiting groove 125 adapted to the annular protrusion 51 is provided on the upper surface of the seat plate 12. The annular protrusion 51 and the limiting groove 125 jointly limit the axial position of the main double-headed screw 5, and a plurality of jacks 511 are provided at equal angles on the outer circumference of the annular protrusion 51.

[0048] When the second fastener 43 is loosened, a rod-shaped tool is inserted into the insertion hole 511 to drive the double-headed screw 5 to rotate, so that the double-headed screw 5 can drive the two side positioning members 4 to move closer to or away from each other, so that the two side positioning members 4 can clamp or loosen the axle main bridge. After the two side positioning members 4 clamp the axle main bridge at the same time, the second fastener 43 is locked again, so that the two side positioning members 4 form a good limiting effect on the axle main bridge.

[0049] Reference Figure 2 The pressing mechanism 3 includes a scissor frame 31 and a third fastener 32. The scissor frame 31 includes two scissor arms 311 that are cross-hinged with each other. The two scissor arms 311 are commonly connected with a coil spring 33. The coil spring 33 is used to prevent the two scissor arms 311 from opening each other. A hinge rod 312 is provided at one end of the scissor arm 311. The two hinge rods 312 are commonly connected with a hinge seat 313. The third fastener 32 is connected with the hinge seat 313 through a penetration. The third fastener 32 is threadedly connected with the seat plate 12. A hook portion 3111 is provided at one end of the scissor arm 311 away from the hinge rod 312. The hook portions 3111 of the two scissor arms 311 are used to clamp the wide wing edge of the front axle workpiece.

[0050] When the pressing mechanism 3 is used to press the front axle workpiece, the third fastener 32 is screwed downwards while the two hooks 3111 of the scissor frame 31 hook the wide wing edge of the front axle workpiece at the same time, so that the third fastener 32 drives the hinge seat 313 close to the seat plate 12, so that the two hooks 3111 of the scissor frame 31 clamp the front axle workpiece and apply downward pressure to the front axle workpiece. When disassembling the front axle workpiece, the third fastener 32 is loosened, and the two scissor arms 311 of the scissor frame 31 are opened, so that the wide wing edge of the front axle workpiece can be disengaged from between the two hooks 3111.

[0051] It is worth noting that the pressing mechanism 3 can be replaced by two bolts in another embodiment, which are respectively arranged on both sides of the front axle workpiece, and the bolt caps of the bolts are used to directly press the front axle workpiece downward. In addition, a pressure plate can be arranged between the two bolts, and the bolt caps of the two bolts apply downward pressure to the front axle workpiece through the pressure plate.

[0052] Reference Figure 4 and Figure 5 The seat plate 12 is detachably embedded with an internal thread sleeve 6, which is located above the wedge-shaped pad 13. The outer peripheral surface of the internal thread sleeve 6 is a conical surface, and the small end of the internal thread sleeve 6 faces upward. The internal thread sleeve 6 is used for threaded connection with the third fastener 32. The large end of the outer peripheral surface of the internal thread sleeve 6 is provided with a limiting flange 61, which is square, and the four corners of the limiting flange 61 are all rounded. The seat plate 12 is provided with a mounting hole 126 adapted to the internal thread sleeve 6, and the mounting hole 126 is provided with a countersunk hole 127 adapted to the limiting flange 61, and the depth of the countersunk hole 127 is greater than the thickness end of the limiting flange 61.

[0053] The third fastener 32 of the pressing mechanism 3 needs to be frequently tightened and loosened to facilitate the replacement of the front axle workpiece; when the engagement between the third fastener 32 and the internal threaded sleeve 6 becomes loose, the internal threaded sleeve 6 can be replaced in time to repair the fault of the fixture.

[0054] Reference Figure 4 The third fastener 32 is a hexagon socket bolt, and the bolt head of the hexagon socket bolt is provided with a rubber damping ring 321, and the rubber damping ring 321 is in a tensioned and deformed state; the inner hole of the internal threaded sleeve 6 includes a threaded section 62 and a guide section 63, and the guide section 63 is located above the threaded section 62, and the guide section 63 and the hexagon socket bolt are in clearance fit. In the process of locking the third fastener 32, the third fastener 32 is firstly screwed into the internal threaded sleeve 6 by manually turning the knob, and when the third fastener 32 is screwed into a greater depth, the third fastener 32 is then locked using a hexagon wrench.

[0055] The implementation principle of a fixture for machining the locking pin hole of the front axle of an automobile in the embodiment of the present application is as follows: when machining the front axle workpiece, the fixture is clamped on the machining platform of the machine tool to fix the front axle workpiece. The front axle workpiece is installed above the seat plate 12 through the support member 2, the pressing mechanism 3 and the side positioning member 4. The support member 2 and the pressing mechanism 3 clamp the front axle workpiece together, and the two side positioning members 4 jointly limit the position of the front axle workpiece along the length direction of the base 1. The lower surface of the base plate 11 serves as the mounting surface of the fixture. The seat plate 12 and the base plate 11 are hinged to each other and separated by a wedge-shaped pad 13, so that the seat plate 12 and the base plate 11 maintain an inclination angle that is adapted to the inner inclination angle of the locking pin hole, so that the drilling tool can drill the locking pin hole vertically downward. After the locking pin hole at one end of the front axle workpiece is machined, the pressing mechanism 3 and the side positioning member 4 are loosened, and then the front axle workpiece is turned around and re-clamped to drill the locking pin hole at the other end.

[0056] By changing different wedge-shaped pads 13, the relative angle between the seat plate 12 and the bottom plate 11 can be changed. The positions of the two side positioning members 4 and the two supporting members 2 can be adjusted as needed to adapt to front axle workpieces of different specifications, thereby improving the application range of the clamp.

[0057] Example 2

[0058] The difference between this embodiment and the first embodiment is that the structure of the side positioning member 4 in this embodiment and the connection method between the side positioning member 4 and the seat plate 12 are different from those in the first embodiment.

[0059] Reference Figure 6 The side positioning member 4 includes a side support member 2, a positioning block 42 and an adjusting bolt 44. The positioning block 42 is provided with an inner concave angle 421 for abutting against the end position of the front axle workpiece. The positioning block 42 and the side support seat 41 are slidably connected along the length direction of the seat plate 12. The length direction of the adjusting bolt 44 is parallel to the length of the seat plate 12. The side support seat 41 is provided with a bolt mounting block 45. The adjusting bolt 44 is rotatably connected to the bolt mounting block 45. The adjusting bolt 44 is threadedly connected to the positioning block 42. The adjusting bolt 44 is used to drive the positioning block 42 to move along the length direction of the seat plate 12 so that the inner concave angle 421 of the positioning block 42 can abut against the end of the main bridge of the axle.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fixture for machining lock pin holes of automobile front axles, characterized in that: The invention comprises a base (1), wherein the base (1) is provided with a support member (2), a downward pressing mechanism (3) and a side positioning member (4), wherein the support member (2) is used to support a front axle workpiece, and the downward pressing mechanism (3) is used to apply downward pressure to the front axle workpiece; two side positioning members (4) are provided and are respectively located at two ends of the base (1) along the length direction, and the two side positioning members (4) are respectively used to abut against two ends of the front axle workpiece; the base (1) comprises a bottom plate (11) and a seat plate (12), one end of the seat plate (12) is hinged to one end of the bottom plate (11), a wedge-shaped pad (13) is provided between the seat plate (12) and the bottom plate (11), and the wedge-shaped pad (13) forms static friction with the bottom plate (11) and the seat plate (12) respectively, and a first fastener (14) is detachably connected between the bottom plate (11) and the seat plate (12); The side positioning member (4) is detachably connected to the seat plate (12) via a group of second fasteners (43); threaded connection holes (122) are symmetrically provided at both ends of the seat plate (12); a plurality of groups of threaded connection holes (122) are provided at each end of the seat plate (12); each group of threaded connection holes (122) is connected to a group of the second fasteners (43); The bottom plate (11) is provided with a plurality of connecting columns (15), the axes of the connecting columns (15) are parallel to the bottom surface of the bottom plate (11); the outer peripheral surface of the connecting column (15) comprises an arc surface (151) and a plane surface (152), the arc angle of the arc surface (151) is greater than a straight angle, the bottom surface of the bottom plate (11) is provided with a mounting groove (111) for mounting the connecting column (15), the mounting groove (111) is an arc groove, the arc angle of the arc groove is greater than the arc angle of the arc surface (151), the first fastener (14) is threadedly connected to the connecting column (15), the first fastener (14) is perpendicular to the connecting column (15), the seat plate (12) is provided with a first avoidance hole (121) for avoiding the first fastener (14), and the upper surface of the bottom plate (11) is provided with a second avoidance hole (112) for avoiding the first fastener (14); The pressing mechanism (3) comprises a scissor frame (31) and a third fastener (32), the scissor frame (31) comprising two scissor arms (311) cross-hinged with each other, one end of the scissor arm (311) is provided with a hinge rod (312), the two hinge rods (312) are commonly connected to a hinge seat (313), the third fastener (32) is connected to the hinge seat (313) through a threaded connection, the third fastener (32) is threadedly connected to the seat plate (12), one end of the scissor arm (311) away from the hinge rod (312) is provided with a hook portion (3111), and the hook portions (3111) of the two scissor arms (311) are used to clamp the wide wing edge of the front axle workpiece together.

2. The automobile front axle lock pin hole machining fixture according to claim 1, characterized in that: A sliding block (411) is provided on the bottom surface of the side positioning member (4), and a sliding groove (123) is provided on the upper surface of the seat plate (12), and the sliding block (411) is slidingly connected to the sliding groove (123); the seat plate (12) is rotatably connected to a double-headed screw (5), the external threads at both ends of the double-headed screw (5) have opposite thread rotation directions, and the two ends of the double-headed screw (5) are respectively threadedly connected to the two side positioning members (4); the side positioning member (4) is provided with a through hole for passing the second fastener (43), and the second fastener (43) is clearance-matched with the through hole.

3. The automobile front axle lock pin hole machining fixture according to claim 1, characterized in that: The side positioning member (4) comprises a side support seat (41) and a positioning block (42); the positioning block (42) is provided with an inner concave angle (421) for abutting against the end position of the front axle workpiece; the positioning block (42) and the side support seat (41) are slidably connected along the length direction of the base (1); the side support seat (41) is provided with an adjusting bolt (44); the adjusting bolt (44) is used to drive the positioning block (42) to move along the length direction of the seat plate (12).

4. The automobile front axle lock pin hole machining fixture according to claim 1, characterized in that: The two scissor arms (311) are commonly connected to a coil spring (33), and the coil spring (33) is used to prevent the two scissor arms (311) from opening apart from each other.

5. The automobile front axle lock pin hole machining fixture according to claim 1, characterized in that: The seat plate (12) is detachably embedded with an internal thread sleeve (6), and the internal thread sleeve (6) is used for threaded connection with the third fastener (32).

6. The automobile front axle lock pin hole machining fixture according to claim 5, characterized in that: The outer circumferential surface of the internally threaded sleeve (6) is provided with a limiting flange (61), and the limiting flange (61) is polygonal; the seat plate (12) is provided with a mounting hole (126) adapted to the internally threaded sleeve (6), and the mounting hole (126) is provided with a countersunk hole (127) adapted to the limiting flange (61), and the depth of the countersunk hole (127) is greater than the thickness of the limiting flange (61); the outer circumferential surface of the internally threaded sleeve (6) is a conical surface, the small end of the internally threaded sleeve (6) faces upward, and the limiting flange (61) is located at the large end of the internally threaded sleeve (6).

7. The automobile front axle lock pin hole machining fixture according to claim 5, characterized in that: The third fastener (32) is a hexagon socket bolt, the bolt head sleeve of the hexagon socket bolt is provided with a rubber damping ring (321), and the rubber damping ring (321) is in a tensioned and deformed state; the inner hole of the internal thread sleeve (6) comprises a threaded section (62) and a guide section (63), the guide section (63) is located above the threaded section (62), and the guide section (63) is clearance-matched with the hexagon socket bolt.

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