A quick and precise positioning and clamping tool for an automobile axle housing

Abstract

A kind of automobile axle housing fast and accurate positioning clamping tool, including: axle tool frame (7), the axle tool frame (7) with the two sides corresponding with axle shaft direction respectively fixedly installed with end face clamping mechanism (2), the axle tool frame (7) below fixedly installed with several bottom support mechanisms (4), and above fixedly installed with several upper compressing mechanisms (3), the axle tool frame (7) below slidingly installed with middle alignment mechanism (5), still fixedly installed with sensor (6), the present scheme can realize the axial positioning of axle housing by middle alignment mechanism (5), and whether the installation of axle housing is even and whether it is close to tool, when end face clamping mechanism (2) clamps axle housing, whether the axle housing is pushed by sensor (6) and middle alignment device (5) tool center, and can send out warning, tell operator, upper compressing mechanism (3) is compressed to axle housing from upper end, bottom support mechanism (4) can provide buffer for axle housing.

Description

Technical Field

[0001] This invention relates to the field of automotive axle housing manufacturing, and more particularly to a fast and precise positioning and clamping fixture for automotive axle housings. Background Technology

[0002] In recent decades, my country's automobile industry has developed rapidly, and automobile parts processing and manufacturing, as an important supporting pillar of the automobile industry, has also developed rapidly; axle housings are one of the important components of automobile parts processing and manufacturing.

[0003] The axle housing is a component of both the transmission system and the driving system. When machining the axle housing, positioning and clamping fixtures are often required. Currently, the following problems often occur during the positioning and clamping process of the axle housing on the fixture: (1) There are many non-critical support points or clamping points on the fixture. After the axle housing is machined in the previous process, there are often dimensional deviations, especially in non-critical parts. The range of dimensional deviations that are deemed acceptable is large, which can easily lead to interference between the support points and the clamping points, resulting in the axle housing and the fixture reference surface not being able to fit completely; (2) There are often slight differences in the length of the two arms of the axle housing, which can easily lead to the problem that the axle housing is placed backwards and cannot be detected by the fixture.

[0004] To solve the above problems, a high degree of human intervention is often required. The steps usually include: 1) checking whether the axle housing is placed backwards; 2) checking the positioning accuracy of the axle housing before clamping; 3) checking the positioning accuracy of the axle housing after clamping.

[0005] However, due to numerous human uncertainties and high labor intensity, poor product precision often occurs. In addition, because there are many types of bridge housings, changing the production model often requires changing the tooling or making significant changes and adjustments to the original tooling, which brings great inconvenience to continuous production. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a fast and precise positioning and clamping fixture for automotive axle housings. The specific technical solution is as follows:

[0007] A fast and precise positioning and clamping fixture for automotive axle housings includes: an axle fixture frame; end face clamping mechanisms are fixedly installed on both sides of the axle fixture frame corresponding to the axle axis; a plurality of bottom support mechanisms are fixedly installed below the axle fixture frame, and a plurality of upper pressing mechanisms are fixedly installed above the axle fixture frame; a middle alignment mechanism is slidably installed below the axle fixture frame, and a sensor is fixedly installed thereon.

[0008] Furthermore, the central alignment mechanism includes a central drive mechanism and a central support mechanism. The central drive mechanism is slidably installed below the axle tooling frame, and the central support mechanism is fixedly installed on the central alignment mechanism.

[0009] Furthermore, the sensor is fixedly mounted on the axle tooling frame and is used to detect the displacement distance of the alignment mechanism mounting bracket on the axle tooling frame.

[0010] Furthermore, a first slide rail is fixedly connected to the axle tooling frame, and the central drive mechanism includes: an alignment mechanism mounting bracket and a push rod. The alignment mechanism mounting bracket is slidably connected to the first slide rail, and a drive motor is fixedly connected to the alignment mechanism mounting bracket. A small bevel gear is fixedly connected to the output shaft of the drive motor. A large bevel gear is also rotatably connected to the alignment mechanism mounting bracket and meshes with the small bevel gear. A hole is opened in the middle of the large bevel gear, and a thread is provided inside the hole. The push rod is threaded, and one end of the push rod is threadedly connected to the hole opened in the middle of the large bevel gear, while the other end is fixedly connected to a central support mechanism.

[0011] Furthermore, the central support mechanism includes: a support block, a sliding rod, a connecting rod, and a support member. The support block is hollow inside, with clearances on its side walls, and a connecting block is fixedly connected to its upper end. The lower end of the support block is fixedly connected to the top rod. The lower end of the support member passes through the connecting block and is slidably connected to the interior of the support block. The support member is elastically connected to the support block via a spring and fixedly connected to the mounting bracket via the clearances. There are several connecting rods, each of which has one end rotatably connected to the connecting block and the other end rotatably connected to a moving member. The moving member is slidably connected to the edge of the support member.

[0012] Furthermore, a screw is fixedly connected inside the support block and slidably connected to the support member; a shaped disk is rotatably connected inside the support member, the shaped disk has a hole with a thread inside, and is engaged with the screw through the thread; several sliding rods are provided, all slidably connected inside the support member, and all elastically connected to the support member through sliding rod springs; one end of each sliding rod is fixedly connected to a moving part, and the other end contacts the shaped disk.

[0013] Furthermore, the end face clamping mechanism includes: a clamping device mounting plate and upper and lower connecting plates. The clamping device mounting plate is fixedly mounted on the axle tooling frame. A second slide rail is fixedly mounted above the clamping device mounting plate, and a chuck mounting plate is slidably connected to the second slide rail. A chuck is fixedly connected to the chuck mounting plate, and a cylinder is rotatably connected to the gripper of the chuck. A first clamping drive device is fixedly mounted below the clamping device mounting plate. One end of the upper and lower connecting plates is fixedly connected to the output end of the first clamping drive device, and the other end is fixedly connected to the chuck mounting plate. Several locking mechanisms are fixedly connected to the chuck mounting plate.

[0014] Furthermore, the locking mechanism includes: a locking mounting block, which is fixedly mounted on the chuck mounting plate; a locking screw is internally engaged with the locking mounting block; a locking block is rotatably connected below the locking screw; and a locking nut is engaged with the locking screw above it, with the locking nut located above the locking mounting block; a locking rail is fixedly connected to the clamping device mounting plate and is located directly below the locking block.

[0015] Furthermore, the upper clamping device includes: a clamping mounting frame, an inner connecting plate, an outer connecting plate, and a pressure plate mounting plate. The clamping mounting frame is fixedly mounted on the axle tooling frame, and a second clamping drive device is rotatably connected to the clamping mounting frame. One end of the outer connecting plate is rotatably connected to the output end of the second clamping drive device, and the other end is rotatably connected to the clamping mounting frame. One end of the pressure plate mounting plate is fixedly connected to the clamping mounting frame, and the other end is fixedly connected to a pressure plate. One end of the inner connecting plate is rotatably connected to the output end of the second clamping drive device, and the other end is rotatably connected to the pressure plate mounting plate.

[0016] Furthermore, the bottom support mechanism includes: a support mechanism mounting plate and a support barrel mounting plate. The support mechanism mounting plate is fixedly mounted on the axle tooling frame. Two buffer devices are fixedly connected to the support mechanism mounting plate and are axially symmetrical with respect to the axle housing. The two buffer devices are respectively fixedly connected to the two ends of the support barrel mounting plate. A support barrel is rotatably connected to the support barrel mounting plate.

[0017] Furthermore, the buffer device includes: a lower housing and an upper housing. The lower housing is fixedly mounted on the support mechanism mounting plate, and the upper end of the upper housing is fixedly connected to the support barrel mounting plate. The lower housing and the upper housing are elastically connected by a buffer spring, and the lower end of the upper housing is slidably connected inside the lower housing.

[0018] Furthermore, several sliders are slidably connected to the axle tooling frame, and the sliding direction of the sliders is parallel to the rotation axis of the support barrel.

[0019] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0020] (1) When installing the bridge housing, the present invention uses the reinforcing ring and the two shaft lengths on the bridge housing as positioning. Since the reinforcing ring and the two shaft lengths are key parts with small errors, using the reinforcing ring and the two shaft lengths as positioning references can improve the accuracy of bridge housing installation and reduce the error of subsequent operations.

[0021] (2) The present invention can quickly position the reinforcing ring as a reference through the central alignment mechanism, and can determine whether the reinforcing ring of the bridge housing is close to the tooling or tilted. After the bridge housing is installed, it can be clamped from the middle of the bridge housing and aligned for correction. If the correction is unsuccessful, the central alignment mechanism will issue a reminder to prevent it from affecting subsequent processing.

[0022] (3) The present invention, through the cooperation of end face clamping mechanism and sensor, can automatically determine whether the bridge housing is placed in reverse when the lengths of the two arms of the bridge housing are not equal.

[0023] (4) The present invention can be adapted to bridge housings of similar models without changing tooling. Only the program needs to be changed and the end face clamping mechanism needs to be simply adjusted.

[0024] (5) The present invention enables the automobile axle housing to be quickly and accurately installed onto the tooling through the cooperation between the end face clamping mechanism, the upper pressing mechanism, the bottom support mechanism and the middle alignment mechanism. Furthermore, the cooperation between the middle alignment mechanism and the end face clamping mechanism ensures that the center of the axle housing is always in the center of the tooling, thus avoiding the trouble of manual installation and alignment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention after the bridge housing is installed.

[0026] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the overall structure of the present invention from another angle.

[0028] Figure 4 This is a schematic diagram of the overall structure of the alignment mechanism in the middle of the present invention.

[0029] Figure 5 This is a schematic diagram of the alignment mechanism in the middle of the present invention.

[0030] Figure 6 This is a cross-sectional schematic diagram of the alignment mechanism in the middle of the present invention.

[0031] Figure 7 This is a cross-sectional view of the alignment mechanism in the middle of the present invention from another angle.

[0032] Figure 8 This is a schematic diagram showing the connection relationship between the support block and the support member of the present invention.

[0033] Figure 9 This is a schematic diagram of the overall structure of the end face clamping mechanism of the present invention.

[0034] Figure 10 This is a schematic diagram of the overall structure of the end face clamping mechanism of the present invention from the bottom angle.

[0035] Figure 11 This is a schematic diagram of the overall structure of the end face clamping mechanism of the present invention from another angle.

[0036] Figure 12 For the present invention Figure 11 Enlarged schematic diagram of the structure at point A.

[0037] Figure 13 This is a schematic diagram of the overall structure of the upper clamping mechanism of the present invention.

[0038] Figure 14 This is a schematic diagram of the upper clamping mechanism of the present invention.

[0039] Figure 15 This is a schematic diagram of the overall structure of the bottom support mechanism of the present invention.

[0040] Figure 16 This is a cross-sectional schematic diagram of the overall structure of the bottom support mechanism of the present invention.

[0041] Figure 17 This is a schematic diagram of the frame structure of the axle tooling of the present invention.

[0042] Reference numerals: 2-End face clamping mechanism; 3-Upper clamping mechanism; 4-Bottom support mechanism; 5-Middle alignment mechanism; 6-Sensor; 7-Axle tooling frame; 201-Clamping device mounting plate; 202-Chuck; 203-Cylinder; 204-Locking mechanism; 205-Chuck mounting plate; 206-Upper and lower connecting plates; 207-First clamping drive device; 208-Second slide rail; 2041-Locking mounting block; 2042-Locking screw; 2043-Locking nut; 2044-Locking block; 2045-Locking rail; 301-Second clamping drive device; 302-Clamping mounting bracket; 303-Inner connecting plate; 304- External connecting plate; 305-Pressure plate mounting plate; 306-Pressure plate; 401-Buffer device; 402-Support mechanism mounting plate; 403-Support barrel mounting plate; 404-Support barrel; 4011-Lower shell of buffer device; 4012-Buffer spring; 4013-Upper shell of buffer device; 501-Alignment mechanism mounting bracket; 502-Drive motor; 503-Small bevel gear; 504-Large bevel gear; 505-Top rod; 506-Support block; 508-Irregularly shaped disc; 509-Moving part; 510-Slide rod; 511-Connecting rod; 512-Spring; 513-Screw rod; 514-Supporting part; 701-First slide rail; 702-Slider. Detailed Implementation

[0043] This invention discloses a quick and precise positioning and clamping fixture for automotive axle housings. The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Examples, such as Figure 1-3 As shown, a fast and precise positioning and clamping fixture for an automotive axle housing includes: an axle fixture frame 7; end face clamping mechanisms 2 are fixedly installed on both sides of the axle fixture frame 7 corresponding to the axle axis; two bottom support mechanisms 4 are fixedly installed below the axle fixture frame 7, and two upper clamping mechanisms 3 are fixedly installed above it; a central alignment mechanism 5 is slidably installed below the axle fixture frame 7, and four sensors 6 are also fixedly installed, located at the four corners of the alignment mechanism mounting bracket. The sensors 6 are fixedly installed on the axle fixture frame 7 and are used to detect the displacement distance of the alignment mechanism mounting bracket 501 on the axle fixture frame 7; the center of the central alignment mechanism 5 is aligned with... The center of the axle tooling frame 7 is aligned. The end face clamping mechanism 2 is installed on both sides of the axle axis for axial clamping. The upper pressing mechanism 3 presses the axle from above. The bottom support mechanism 4 supports the axle. The sensor 6 is a linear displacement sensor. The pull rod of the linear displacement sensor is fixedly connected to the alignment mechanism mounting bracket 501. When the middle alignment mechanism 5 slides on the first slide rail 701, the linear displacement sensor can display the distance that the middle alignment mechanism 5 moves on the first slide rail 701 in real time. If the allowable displacement distance is exceeded, a reminder will be issued to inform the operator that the deviation is too large and manual adjustment is required.

[0046] Specifically, such as Figure 4 As shown, the central alignment mechanism 5 includes a central drive mechanism and a central support mechanism. The central drive mechanism is slidably installed below the axle tooling frame 7, and the central support mechanism is fixedly installed on the central alignment mechanism. The central drive device provides power to the central support mechanism.

[0047] Specifically, such as Figure 4-6As shown, a first slide rail 701 is fixedly connected to the axle tooling frame 7. The central drive mechanism includes: an alignment mechanism mounting bracket 501 and a push rod 505. The alignment mechanism mounting bracket 501 is slidably connected to the first slide rail 701. A drive motor 502 is fixedly connected to the alignment mechanism mounting bracket 501, and a small bevel gear 503 is fixedly connected to the output shaft of the drive motor 502. A large bevel gear 504 is also rotatably connected to the alignment mechanism mounting bracket 501 and meshes with the small bevel gear 503. A hole is opened in the middle of the large bevel gear 504, and a thread is provided inside the hole. The push rod 505 is threaded. One end of the push rod 505 is threaded and connected to the hole opened in the middle of the large bevel gear 504, and the other end is fixedly connected to a central support mechanism. The central alignment mechanism 5 is slidably connected to the first slide rail 701 below the axle tooling frame 7, and can... The axle housing slides along its axis. The drive motor 502 provides power to the entire central alignment device 5. When the drive motor 502 starts, it causes the large bevel gear 504 to rotate through the small bevel gear 503. Since the push rod 505 is meshed with the large bevel gear 504, the push rod 505 rises. The large bevel gear 504 is rotatably connected to the alignment mechanism mounting bracket 501 through a double-row tapered roller bearing. The drive motor 502 is a servo motor, and its output stroke and output torque are matched. That is, when the output stroke is constant, its output torque is constant. If the output torque reaches the preset force of tightening the reinforcing ring, but the number of rotations of the output shaft of the servo motor does not reach the set value, it indicates that the axle housing is tilted or not in close contact with the fixture. At this time, a reminder will be issued to inform the operator that the axle housing is not level with the fixture or is not in close contact with the fixture.

[0048] Specifically, such as Figure 6-8As shown, the central support mechanism includes: a support block 506, a sliding rod 510, a connecting rod 511, and a support member 514. The support block 506 is hollow inside, with a clearance on its side wall, and a connecting block is fixedly connected to its upper end. The lower end of the support block 506 is fixedly connected to the top rod 505. The lower end of the support member 514 passes through the connecting block and is slidably connected to the inside of the support block 506. The support member 514 is elastically connected to the support block 506 by a spring 512, and is fixedly connected to the mounting bracket 501 by the clearance. There are several connecting rods 511, one end of each connecting rod 511 is rotatably connected to the connecting block, and the other end is rotatably connected to a moving member 509. The movable component 509 is slidably connected to the edge of the support component 514; a screw 513 is fixedly connected inside the support block 506 and slidably connected to the support component 514; a shaped disk 508 is rotatably connected inside the support component 514, the shaped disk 508 has a hole with a thread, and is connected to the screw 513 through the thread; two slide rods 510 are provided, both slidably connected inside the support component 514, and both are elastically connected to the support component 514 through slide rod springs; one end of each slide rod 510 is fixedly connected to the movable component 509, and the other end contacts the shaped disk 508; the upper end of the support component 514 is an elliptical shell, and is reinforced with the bridge shell after the bridge shell is installed. The rings are parallel and elliptical, with a distance of 3 to 5 centimeters from the reinforcing ring around their circumference; the irregularly shaped disk 508 is an elliptical disk; the connecting rod 511 is located on the minor diameter of the ellipse and is symmetrical about the major diameter of the ellipse; the sliding rod 510 is located on the major diameter of the ellipse; when the top rod 505 rises, the support block 506 is lifted, causing the movable part 509 on the minor diameter of the ellipse to move outward through the two connecting rods 511, thereby pressing against the inner diameter of the bridge housing reinforcing ring; at the same time, since the screw 513 is fixedly connected inside the support block 506, the screw 513 will also rise with the support block 506, causing the irregularly shaped disk 508 to rotate, causing the movable part 509 on the major diameter of the support part 514 to be moved outward through the sliding rod 510. Pushing it open, it presses against the inner wall of the bridge housing reinforcing ring. After the bridge housing is processed, the drive motor 502 controls the push rod 505 to descend, no longer pressing against the support block 506. The spring 512 causes the moving part 509, which is slidably connected to the support member 514 with a small diameter, to reset, no longer pressing against the bridge housing reinforcing ring. At the same time, due to the lack of force support, the slide spring on the slide rod 510 rebounds, causing the moving part 509, which is slidably connected to the support member 514 with a large diameter, to reset, and causing the shaped disk 508 to reset, and the screw 513 to descend. The shaped disk 508 is rotatably connected to the support member 514 through bearings at both the top and bottom. The end of the slide rod 510 that contacts the shaped disk 508 is a smooth inclined surface.

[0049] Specifically, such as Figure 9-11As shown, the end face clamping mechanism 2 includes: a clamping device mounting plate 201 and upper and lower connecting plates 206. The clamping device mounting plate 201 is fixedly mounted on the axle tooling frame 7. A second slide rail 208 is fixedly mounted above the clamping device mounting plate 201. A chuck mounting plate 205 is slidably connected to the second slide rail 208. A chuck 202 is fixedly connected to the chuck mounting plate 205. A cylinder 203 is rotatably connected to the gripper of the chuck 202. A first clamping drive device 207 is fixedly mounted below the clamping device mounting plate 201. One end of the upper and lower connecting plates 206 is fixedly connected to the output end of the first clamping drive device 207, and the other end is fixedly connected to the chuck mounting plate 205. Several locking mechanisms 204 are fixedly connected to the chuck mounting plate 205. The first clamping drive device 207 is a cylinder. The output end of the cylinder is connected to the upper and lower connecting plates 206. The connecting plate 206 is fixedly connected, and the chuck 202 is a two-jaw hollow power chuck with two grippers arranged horizontally to the left and right. A cylinder 203 is vertically rotatably connected to the grippers. When the axle housing is clamped, the cylinder is activated, and the end face clamping mechanisms on both sides move inward, so that the two shaft ends of the axle housing are located between the two grippers of the two-jaw hollow power chuck. The cylinder 203 is used to facilitate the entry of the axle housing shaft ends into the two grippers of the two-jaw hollow power chuck, replacing sliding friction with rolling friction. Then the two-jaw hollow power chuck is activated and clamps inward, with the cylinder 203 clamping the two shafts of the axle housing. If the driving torque changes due to the failure of one of the cylinders, or if the axle housing is installed in the opposite direction, the axle housing will be pushed away from the tooling center. At this time, the sensor 6, i.e., the linear displacement sensor, will issue a warning to inform the operator of the error and prevent problems in subsequent processing.

[0050] Specifically, such as Figure 12 As shown, the locking mechanism 204 includes: a locking mounting block 2041, which is fixedly mounted on the chuck mounting plate 205; a locking screw 2042 is internally engaged with the locking mounting block 2041; a locking block 2044 is rotatably connected below the locking screw 2042; and a locking nut 2043 is engaged with the locking screw 2042 above it, with the locking nut 2043 located above the locking mounting block 2041; and a clamping device mounting plate 201 is fixed with... A locking rail 2045 is connected and located directly below the locking block 2044. The locking rail 2045 has teeth on its upper part and the locking block has teeth on its lower part. After the end face clamping mechanism 2 clamps the axle housing and no errors occur, the operator rotates the locking screw 2042 to make the locking block 2044 press the locking rail 2045. Then, the locking nut 2043 is tightened to fix the locking screw 2042, fix the end face clamping mechanism 2, and fix the axle housing axially.

[0051] Specifically, such as Figure 13-14As shown, the upper clamping device 3 includes: a clamping mounting frame 302, an inner connecting plate 303, an outer connecting plate 304, and a pressure plate mounting plate 305. The clamping mounting frame 302 is fixedly mounted on the axle tooling frame 7, and a second clamping drive device 301 is rotatably connected to the clamping mounting frame 302. One end of the outer connecting plate 304 is rotatably connected to the output end of the second clamping drive device 301, and the other end is rotatably connected to the clamping mounting frame 302. One end of the pressure plate mounting plate 305 is connected to the clamping mounting frame 302. The inner connecting plate 303 is fixedly connected to the output end of the second clamping drive device 301 at one end and to the pressure plate mounting plate 305 at the other end. The second clamping drive device 301 is a cylinder. The cylinder body is rotatably connected to the clamping mounting bracket 302. The cylinder output end is rotatably connected to the inner connecting plate 303 and the outer connecting plate 304. When the cylinder extends, the pressure plate mounting plate 305 is pressed down through the inner connecting plate, and the bridge housing is pressed by the pressure plate 306.

[0052] Specifically, such as Figure 15-16 As shown, the bottom support mechanism 4 includes: a support mechanism mounting plate 402 and a support barrel mounting plate 403. The support mechanism mounting plate 402 is fixedly mounted on the axle tooling frame 7. Two buffer devices 401 are fixedly connected to the support mechanism mounting plate 402 and are symmetrical with respect to the axle housing axis. The two ends of the support barrel mounting plate 403 are fixedly connected to the top of the two buffer devices 401 respectively. A support barrel 404 is rotatably connected to the support barrel mounting plate 403. The buffer devices 401 provide a buffering effect when the axle housing is lowered. The support barrel 404 can provide rolling friction for the middle alignment mechanism 5 when it is aligned with the axle housing position, avoiding excessive sliding friction. The rotation direction is along the axis of the axle housing. The output torque of the servo motor does not correspond to the output, causing the middle alignment mechanism 5 to make a misalignment judgment and generate an error reminder.

[0053] Specifically, such as Figure 16 As shown, the buffer device 401 includes: a lower buffer device shell 4011 and an upper buffer device shell 4013. The lower buffer device shell 4011 is fixedly installed on the support mechanism mounting plate 402. The upper end of the upper buffer device shell 4013 is fixedly connected to the support barrel mounting plate 403. The lower buffer device shell 4011 and the upper buffer device shell 4013 are elastically connected by a buffer spring 4012, and the lower end of the upper buffer device shell 4013 is slidably connected inside the lower buffer device shell 4011. When the bridge shell is placed on the tooling, the bridge shell contacts the support barrel 404. When the upper pressing device 3 presses down on the bridge shell, the buffer device 401 is squeezed to prevent damage to the bridge shell or the upper pressing device. The upper buffer device shell 4013 compresses the spring 4012, causing the bridge shell to be subjected to an upward force. Therefore, the bridge shell receives both upper and lower forces simultaneously, and is no longer movable vertically.

[0054] Specifically, such as Figure 17As shown, four sliders 702 are slidably connected to the axle tooling frame 7, located on both sides of the central alignment mechanism 5, with two sliders on each side. The sliders 702 slide in the radial direction of the axle housing. When the axle housing is placed on the tooling, the bottom end of the axle housing contacts the four sliders 702. If the center of the axle housing is offset from the center of the tooling, the central alignment mechanism 5 will automatically align the axle housing. The four sliders 702 allow the axle housing to slide radially during the alignment process, preventing the bottom end of the axle housing from sliding directly with the tooling frame and greatly reducing friction.

[0055] Unless otherwise specified, all the above-mentioned fixed installation methods use hex socket head cap screws for connection.

[0056] Working principle: First, the operator places the axle housing onto the fixture and activates the central alignment mechanism 5. While tightening the axle housing reinforcing ring, the central alignment mechanism 5 uses the slider 702 and support barrel 404 to make the axle housing concentric with the central alignment mechanism. If, after tightening, the axle housing is tilted or not tightly against the fixture, the stroke and torque output of the servo motor will not match. In this case, a warning will be issued to the operator, requiring manual adjustment. If no warning is issued, the end-face clamping mechanism 2 will activate, and both end-face clamping mechanisms 2 will move inward along the axle housing axis simultaneously. The cylinder 203 on the two-jaw hollow power chuck provides rolling friction, facilitating the entry of the shaft heads on both sides of the axle housing between the two cylinders 203. If the transmission... If sensor 6 issues a warning, it indicates that the first clamping drive device 207 is not advancing according to the set torque and stroke, meaning the axle housing may be positioned backwards or there may be a problem with the end face clamping mechanism 2, causing the axle housing center to be pushed to the tooling center. At this time, it is necessary to check whether the end face clamping mechanism 2 and the axle housing are positioned backwards. If sensor 6 does not issue a warning, the process continues. The two-jaw hollow power chuck is activated, and the two cylinders 203 move inwards to clamp the axle housing. Then, the locking nut 2043 is rotated to lock the clamping drive device 2, preventing it from moving axially on the axle tooling frame 7. At this time, the upper pressing device 3 is activated to press the axle housing from the top, and the bottom support mechanism 4 can provide cushioning.

Claims

1. A quick and accurate positioning and clamping tool for an automobile axle housing, characterized in that, Include: Axle tool frame (7), the axle tool frame (7) is fixedly installed with end face clamping mechanism (2) on both sides corresponding to axle shaft, the axle tool frame (7) is fixedly installed with several bottom support mechanisms (4) below, and is fixedly installed with several upper pressure mechanisms (3) above;The axle tool frame (7) is slidably installed with middle alignment mechanism (5) below, and is fixedly installed with sensor (6); The middle alignment mechanism (5) includes: middle drive mechanism and middle support mechanism, the middle drive mechanism is slidably installed below the axle tool frame (7), and the middle support mechanism is fixedly installed on the middle drive mechanism; The axle tool frame (7) is fixedly connected with first slide rail (701), and the middle drive mechanism includes: alignment mechanism mounting bracket (501), top rod (505), the alignment mechanism mounting bracket (501) is slidably connected on the first slide rail (701), the alignment mechanism mounting bracket (501) is fixedly connected with drive motor (502) on, the output shaft of drive motor (502) is fixedly connected with small bevel gear (503);The alignment mechanism mounting bracket (501) is also rotatably connected with large bevel gear (504), and is meshed with the small bevel gear (503) connection;The middle part of the large bevel gear (504) is provided with a hole, and the inside of the hole is provided with a thread, the top rod (505) is provided with a thread, one end of the top rod (505) is connected in the hole of the middle part of the large bevel gear (504) through thread engagement, and the other end is fixedly connected with middle support mechanism; The middle support mechanism includes: support block (506), slide rod (510), connecting rod (511) and support piece (514), the support block (506) is hollow and the sidewall is provided with an empty space, and the upper end is fixedly connected with a connecting block;The lower end of the support block (506) is fixedly connected with the top rod (505);The lower end of the support piece (514) passes through the connecting block and is slidably connected with the support block (506) inside;The support piece (514) is elastically connected with the support block (506) by spring (512), and is fixedly connected with the alignment mechanism mounting bracket (501) by the empty space;The connecting rod (511) is provided with a plurality of, and the one end of each connecting rod (511) is rotatably connected on the connecting block, and the other end is rotatably connected with moving piece (509);The moving piece (509) is slidably connected at the edge of the support piece (514). The end face clamping mechanism (2) comprises a clamping device mounting plate (201), an upper and lower connecting plate (206), the clamping device mounting plate (201) is fixedly installed on the axle tool frame (7), a second sliding rail (208) is fixedly installed above the clamping device mounting plate (201), a chuck mounting plate (205) is slidably connected to the second sliding rail (208), a chuck (202) is fixedly connected to the chuck mounting plate (205), a cylinder (203) is rotatably connected to the chuck (202), a first clamping driving device (207) is fixedly installed below the clamping device mounting plate (201), one end of the upper and lower connecting plate (206) is fixedly connected to the output end of the first clamping driving device (207), and the other end is fixedly connected to the chuck mounting plate (205), and a plurality of locking mechanisms (204) are fixedly connected to the chuck mounting plate (205).

2. The quick and precise positioning and clamping tool for an automobile axle housing according to claim 1, characterized in that, The sensor (6) is fixedly installed on the axle tool frame (7) and is used for detecting the displacement distance of the alignment mechanism mounting rack (501) on the axle tool frame (7).

3. The quick and precise positioning and clamping tool for an automobile axle housing according to claim 1, characterized in that, The support block (506) is fixedly connected with a screw rod (513) inside and is slidably connected with the support piece (514); the support piece (514) is rotatably connected with a special-shaped disc (508) inside, the special-shaped disc (508) is provided with a hole, the hole is provided with a screw thread, and the screw thread is engaged with the screw rod (513); a plurality of slide rods (510) are provided, are slidably connected inside the support piece (514), and are elastically connected with the support piece (514) through slide rod springs; one end of each slide rod (510) is fixedly connected with a moving piece (509), and the other end is in contact with the special-shaped disc (508).

4. The quick and precise positioning and clamping tool for an automobile axle housing according to claim 1, characterized in that, The locking mechanism (204) comprises a locking mounting block (2041), the locking mounting block (2041) is fixedly installed on the chuck mounting plate (205), the locking mounting block (2041) is engaged with a locking screw rod (2042) inside, the locking screw rod (2042) is rotatably connected with a locking block (2044) below and is engaged with a locking nut (2043) above, and the locking nut (2043) is located above the locking mounting block (2041); the clamping device mounting plate (201) is fixedly connected with a locking rail (2045) and is located directly below the locking block (2044).

5. The quick and precise positioning and clamping tool for an automobile axle housing according to claim 1, characterized in that, The upper pressing mechanism (3) comprises a clamping mounting frame (302), an inner connecting plate (303), an outer connecting plate (304), a pressing disc mounting plate (305), the clamping mounting frame (302) is fixedly installed on the axle tool frame (7), and the second clamping driving device (301) is rotatably connected to the clamping mounting frame (302); one end of the outer connecting plate (304) is rotatably connected with the output end of the second clamping driving device (301), and the other end is rotatably connected with the clamping mounting frame (302); one end of the pressing disc mounting plate (305) is fixedly connected with the clamping mounting frame (302), and the other end is fixedly connected with a pressing disc (306); one end of the inner connecting plate (303) is rotatably connected with the output end of the second clamping driving device (301), and the other end is rotatably connected with the pressing disc mounting plate (305).

6. The quick and precise positioning and clamping tool for an automobile axle housing according to claim 1, characterized in that, The bottom support mechanism (4) comprises a support mechanism mounting plate (402) and a support barrel mounting plate (403), the support mechanism mounting plate (402) is fixedly installed on the axle tool frame (7), two buffer devices (401) are fixedly connected to the support mechanism mounting plate (402) and are axially symmetrical relative to the axle housing, the two buffer devices (401) are fixedly connected with two ends of the support barrel mounting plate (403) respectively, and the support barrel mounting plate (403) is rotatably connected with a support barrel (404).

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