Forging equipment for producing rear axle half shaft

By designing a forging equipment including a forging device and a lower mold, using structural components such as transmission columns, cross beams, transmission rods, forging heads and lower molds, the rear axle half shaft is easily removed, which solves the problem of difficulty in taking out the rear axle half shaft in the prior art and improves the removal efficiency.

CN222902551UActive Publication Date: 2025-05-27LUOYANG DAOXI MASCH CO LTD
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Patent Information

Application Number
CN202421821743.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-30
Publication Date
2025-05-27
Estimated Expiration
2034-07-30

AI Technical Summary

Technical Problem

During the forging of the rear axle half shaft, the mold is fixedly installed at the bottom of the forging machine, making it difficult to easily remove the rear axle half shaft.

Method used

A forging equipment including forging devices and lower molds is designed, and the rear axle half shaft is easily removed through structural components such as transmission columns, cross beams, transmission rods, forging heads and lower molds. Specific measures include setting up a connecting plate, extrusion block, connecting assembly and adjustment assembly. Through the cooperation of these components, the disassembly of the movable cylinder and the removal of the rear axle half shaft.

Benefits of technology

Through this design, the removal efficiency of the rear axle half shaft is significantly improved, and the problem that the rear axle half shaft is difficult to easily remove in the prior art is solved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of rear axle shaft production, and discloses forging equipment for rear axle shaft production, which comprises a forging device and a lower die, and the forging device comprises a workbench, two transmission columns, a cross beam, a transmission rod and a forging head. By arranging the forging device, the workbench, the transmission column, the cross beam, the transmission rod, the forging head and other structural components, the rear axle half shaft is forged through the forging device, the rear axle half shaft is shaped through the lower die, the movable cylinder is fixed through the fixing assembly, and the first clamping piece is separated from the movable plate through the extrusion block; the connecting plate and the movable plate are stably fixed through the connecting assembly, the position of the connecting plate is adjusted through the adjusting assembly, the connecting plate is prevented from rotating in the moving process through the limiting rod, the effect of conveniently taking out the rear axle half shaft is achieved, and the problem that the rear axle half shaft cannot be conveniently taken out due to the fact that a die is fixedly installed at the bottom of a forging machine is solved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of rear axle half shaft production, and particularly relates to a forging device for rear axle half shaft production. Background Technique

[0002] The rear axle half shaft is a solid shaft that transmits power between the differential and the driving wheel. Its inner end is connected to the differential half shaft gear, and its outer end is connected to the hub of the driving wheel.

[0003] During the processing of the rear axle half shaft, in order to improve the service life of the rear axle half shaft, forging processing is required. During the forging process, through plastic deformation at high temperature, the grains inside the rear axle half shaft material are refined, thereby improving its strength and toughness, which is crucial for withstanding the impact load and torque generated during the driving of the vehicle. The problem with the above technology is that when forging the rear axle half shaft, the mold is fixedly installed at the bottom of the forging machine, and it is not convenient to take out the rear axle half shaft. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a forging device for rear axle half shaft production that can overcome or at least partially solve the above problems.

[0005] The utility model is realized as follows. A forging device for rear axle half shaft production includes a forging device and a lower mold. The forging device includes a workbench, two transmission columns, a cross beam, a transmission rod, and a forging head. The relative ends of the two transmission columns are respectively fixedly connected to the left and right sides of the workbench, the output ends of the two transmission columns are respectively fixedly connected to the left and right sides of the cross beam, the top of the transmission rod is fixedly connected to the bottom of the cross beam, the top of the forging head is fixedly connected to the bottom of the transmission rod. The lower mold includes a fixed cylinder, a fixed plate, a movable cylinder, and a movable plate. The surface of the fixed cylinder is fixedly connected to the top inside the workbench, the bottom of the fixed plate is fixedly connected to the top of the fixed cylinder, the bottom of the fixed plate is fixedly connected to the top of the workbench, the surface of the movable cylinder is slidably connected to the inside of the fixed cylinder, the bottom of the movable plate is fixedly connected to the top of the movable cylinder, the bottom of the movable plate is movably connected to the top of the fixed plate, and fixed components are arranged on both the left and right sides inside the fixed plate;

[0006] The forging device is used for forging the rear axle half shaft;

[0007] The lower mold is used for shaping the rear axle half shaft;

[0008] The two fixed components are used for fixing the movable cylinder.

[0009] To facilitate the removal of the rear axle half shaft, preferably, a connecting plate is slidably connected to the surface of the transmission rod. On the left and right sides of the bottom of the connecting plate, extrusion blocks are fixedly connected. Connecting components are arranged inside both of the two extrusion blocks, and an adjusting component is arranged inside the connecting plate. By driving the connecting plate to move to the bottom through the adjusting component, two transmission columns are started. The transmission columns drive the transmission rod to move downward. During the movement of the transmission rod, the connecting plate is driven to move downward. During the movement of the connecting plate, the connecting component and the extrusion blocks are driven to move downward. By squeezing the fixing component through the extrusion blocks, the fixing component is separated from the movable plate. Through the connecting component, the connecting plate is stably fixed to the movable plate. By starting the two transmission columns to drive the connecting plate to move upward, during the movement of the connecting plate, the movable plate is driven to move upward. During the movement of the movable plate upward, the movable cylinder is driven to move upward, thereby disassembling the movable cylinder.

[0010] To keep the movable cylinder stable, preferably, the left fixing component includes a first clamping member, a sliding rod, and a fixing spring. The surface of the first clamping member is movably connected to the left side inside the fixed plate. The side of the first clamping member close to the movable plate is movably connected to the left side inside the movable plate. The left and right sides of the sliding rod are fixedly connected to the left side inside the fixed plate. The surface of the sliding rod is slidably connected to the inside of the first clamping member. The fixing spring is sleeved on the surface of the sliding rod. The left side of the fixing spring is fixedly connected to the right side of the first clamping member. The right side of the fixing spring is fixedly connected to the inside of the fixed plate. The top of the surface of the first clamping member can be movably connected to the bottom of the left extrusion block. By inserting the first clamping member into the inside of the movable plate, the movement of the movable plate is restricted. The fixing spring plays a role in keeping the first clamping member stable, thereby fixing the state of the movable plate.

[0011] To stably fix the connecting plate to the movable plate, preferably, the left connecting component includes a second clamping member, a connecting spring, and two sliders. The surface of the second clamping member is movably connected to the left side inside the connecting plate. The side of the second clamping member close to the left extrusion block is movably connected to the inside of the left extrusion block. The left side of the connecting spring is fixedly connected to the right side of the second clamping member. The right side of the connecting spring is fixedly connected to the inside of the connecting plate. The opposite ends of the two sliders are respectively fixedly connected to the front and rear sides of the second clamping member. The surfaces of the two sliders are slidably connected to the inside of the connecting plate. During the movement of the connecting plate, the second clamping member is driven to move downward. The second clamping member contacts the movable plate and is squeezed, driving the second clamping member to move to the right. The connecting spring deforms. When the bottom of the connecting plate contacts the top of the movable plate, the connecting spring rebounds, driving the second clamping member to move to the left, so that the second clamping member is inserted into the inside of the movable plate, thereby stably fixing the connecting plate to the movable plate.

[0012] In order to facilitate adjustment of the height of the connecting plate, preferably, the adjusting assembly includes an adjusting sleeve, an adjusting gear, an adjusting ring, a limit block and a limit ring, the interior of the adjusting sleeve is threadedly connected to the surface of the transmission rod, the interior of the adjusting sleeve is movably connected to the interior of the connecting plate, the surface of the adjusting gear is meshed with the top of the adjusting sleeve surface, the interior of the adjusting ring is meshed with the surface of the adjusting gear, the top of the limit block is fixedly connected to the bottom of the adjusting gear, the surface of the limit block is movably connected to the interior of the connecting plate, the top of the limit ring is fixedly connected to the bottom of the adjusting ring, the surface of the adjusting ring is movably connected to the interior of the connecting plate, the top of the limit ring is fixedly connected to the bottom of the adjusting ring, the surface of the adjusting ring is movably connected to the interior of the connecting plate, and the adjusting ring is rotated to drive the adjusting gear to rotate during the rotation of the adjusting ring, and the adjusting sleeve is driven to rotate during the rotation of the transmission rod surface, so as to adjust the position of the connecting plate.

[0013] In order to prevent the connecting plate from rotating during the movement and causing the two second clamps to move, preferably, the left and right sides of the top of the forging head are fixedly connected to limit rods, the tops of the two limit rods are fixedly connected to the bottom of the cross beam, and the surfaces of the two limit rods are respectively slidably connected to the left and right sides of the inside of the connecting plate, so that the moving direction of the connecting plate is limited by the two limit rods, thereby preventing the connecting plate from rotating.

[0014] In order to improve the stability of the movable cylinder, preferably, a plurality of protruding rods are fixedly connected to the surface of the movable cylinder, and the surfaces of the plurality of protruding rods are slidably connected to the interior of the fixed cylinder. The moving direction of the movable cylinder is limited by the plurality of protruding rods to prevent the movable cylinder from rotating, thereby improving the stability of the movable cylinder.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] The utility model provides structural components such as a forging device, a workbench, a transmission column, a crossbeam, a transmission rod, a forging head and a lower die, performs forging processing on the rear axle half shaft by the forging device, shapes the rear axle half shaft by the lower die, fixes the movable cylinder by a fixing assembly, disengages the first clamping member from the movable plate by an extrusion block, fixes the connecting plate and the movable plate stably by a connecting assembly, adjusts the position of the connecting plate by an adjusting assembly, and prevents the connecting plate from rotating during movement by a limiting rod, thereby achieving the effect of facilitating the removal of the rear axle half shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the movable cylinder movement provided by the embodiment of the utility model;

[0019] Figure 3 It is a schematic three-dimensional structure diagram of the lower mold provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic three-dimensional structure diagram of the connecting plate provided by an embodiment of the present utility model.

[0021] In the figure: 1. forging device; 101. workbench; 102. transmission column; 103. cross beam; 104. transmission rod; 105. forging head; 2. lower mold; 201. fixed cylinder; 202. fixed plate; 203. movable cylinder; 204. movable plate; 3. fixing component; 301. first clamping piece; 302. sliding rod; 303. fixing spring; 4. connecting plate; 5. extrusion block; 6. connecting component; 601. second clamping piece; 602. connecting spring; 603. slider; 7. adjusting component; 701. adjusting sleeve; 702. adjusting gear; 703. adjusting ring; 704. limiting block; 705. limiting ring; 8. limiting rod; 9. convex rod. Specific embodiments

[0022] To further understand the content, features and effects of the present utility model, the following embodiments are cited and described in detail in conjunction with the accompanying drawings as follows.

[0023] The structure of the present utility model will be described in detail below with reference to the accompanying drawings.

[0024] As Figures 1 to 4As shown in the figure, a forging device for the production of rear axle half shafts provided by an embodiment of the present utility model includes a forging device 1 and a lower die 2. The forging device 1 includes a workbench 101, two transmission columns 102, a cross beam 103, a transmission rod 104, and a forging head 105. The opposite ends of the two transmission columns 102 are respectively fixedly connected to the left and right sides of the workbench 101. The output ends of the two transmission columns 102 are respectively fixedly connected to the left and right sides of the cross beam 103. The top of the transmission rod 104 is fixedly connected to the bottom of the cross beam 103. The top of the forging head 105 is fixedly connected to the bottom of the transmission rod 104. The lower die 2 includes a fixed cylinder 201, a fixed plate 202, a movable cylinder 203, and a movable plate 204. The surface of the fixed cylinder 201 is fixedly connected to the top inside the workbench 101. The bottom of the fixed plate 202 is fixedly connected to the top of the fixed cylinder 201. The bottom of the fixed plate 202 is fixedly connected to the top of the workbench 101. The surface of the movable cylinder 203 is slidably connected to the inside of the fixed cylinder 201. The bottom of the movable plate 204 is fixedly connected to the top of the movable cylinder 203. The bottom of the movable plate 204 is movably connected to the top of the fixed plate 202. Fixed components 3 are arranged on both the left and right sides inside the fixed plate 202; the forging device 1 is used for forging and processing the rear axle half shafts; the lower die 2 is used for shaping the rear axle half shafts; the two fixed components 3 are used for fixing the movable cylinder 203. In order to facilitate the removal of the rear axle half shafts, a connecting plate 4 is slidably connected to the surface of the transmission rod 104. Both the left and right sides of the bottom of the connecting plate 4 are fixedly connected with extrusion blocks 5. Connecting components 6 are arranged inside both of the two extrusion blocks 5. An adjusting component 7 is arranged inside the connecting plate 4. By driving the connecting plate 4 to move to the bottom through the adjusting component 7, start the two transmission columns 102. The transmission columns 102 drive the transmission rod 104 to move downward. During the movement of the transmission rod 104, it drives the connecting plate 4 to move downward. During the movement of the connecting plate 4, it drives the connecting component 6 and the extrusion blocks 5 to move downward. By the extrusion blocks 5 extruding the fixed components 3, the fixed components 3 are separated from the movable plate 204. Through the connecting component 6, the connecting plate 4 is stably fixed to the movable plate 204. Start the two transmission columns 102 to drive the connecting plate 4 to move upward. During the movement of the connecting plate 4, it drives the movable plate 204 to move upward. During the movement of the movable plate 204 upward, it drives the movable cylinder 203 to move upward, thereby disassembling the movable cylinder 203. In order to keep the movable cylinder 203 stable, the left fixed component 3 includes a first clamping member 301, a sliding rod 302, and a fixed spring 303. The surface of the first clamping member 301 is movably connected to the left side inside the fixed plate 202. The side of the first clamping member 301 close to the movable plate 204 is movably connected to the left side inside the movable plate 204. Both the left and right sides of the sliding rod 302 are fixedly connected to the left side inside the fixed plate 202. The surface of the sliding rod 302 is slidably connected to the inside of the first clamping member 301. The fixed spring 303 is sleeved on the surface of the sliding rod 302. The left side of the fixed spring 303 is fixedly connected to the right side of the first clamping member 301.The right side of the fixing spring 303 is fixedly connected to the inside of the fixing plate 202. The top of the surface of the first clamping member 301 can be movably connected to the bottom of the left extrusion block 5. By inserting the first clamping member 301 into the inside of the movable plate 204, the movement of the movable plate 204 is restricted. The fixing spring 303 plays a role in keeping the first clamping member 301 stable, so that the movable plate 204 is in a fixed state. In order to make the connection plate 4 and the movable plate 204 fixedly stable, the left connection assembly 6 includes a second clamping member 601, a connection spring 602 and two sliders 603. The surface of the second clamping member 601 is movably connected to the left side inside the connection plate 4. One side of the second clamping member 601 close to the left extrusion block 5 is movably connected to the inside of the left extrusion block 5. The left side of the connection spring 602 is fixedly connected to the right side of the second clamping member 601. The right side of the connection spring 602 is fixedly connected to the inside of the connection plate 4. The opposite ends of the two sliders 603 are respectively fixedly connected to the front and rear sides of the second clamping member 601. The surfaces of the two sliders 603 are both slidably connected to the inside of the connection plate 4. During the movement of the connection plate 4, the second clamping member 601 is driven to move downward. The second clamping member 601 contacts and is squeezed by the movable plate 204, driving the second clamping member 601 to move to the right. The connection spring 602 deforms. When the bottom of the connection plate 4 contacts the top of the movable plate 204, the connection spring 602 rebounds, driving the second clamping member 601 to move to the left, so that the second clamping member 601 is clamped into the inside of the movable plate 204, thus making the connection plate 4 and the movable plate 204 fixedly stable. In order to facilitate the adjustment of the height of the connection plate 4, the adjustment assembly 7 includes an adjustment sleeve 701, an adjustment gear 702, an adjustment ring 703, a limit block 704 and a limit ring 705. The inside of the adjustment sleeve 701 is threadedly connected to the surface of the transmission rod 104. The inside of the adjustment sleeve 701 is movably connected to the inside of the connection plate 4. The surface of the adjustment gear 702 is meshed with the top of the surface of the adjustment sleeve 701. The inside of the adjustment ring 703 is meshed with the surface of the adjustment gear 702. The top of the limit block 704 is fixedly connected to the bottom of the adjustment gear 702. The surface of the limit block 704 is movably connected to the inside of the connection plate 4. The top of the limit ring 705 is fixedly connected to the bottom of the adjustment ring 703. The surface of the adjustment ring 703 is movably connected to the inside of the connection plate 4. By rotating the adjustment ring 703, during the rotation of the adjustment ring 703, the adjustment gear 702 is driven to rotate. During the rotation of the adjustment gear 702, the adjustment sleeve 701 is driven to rotate. During the rotation of the adjustment sleeve 701 on the surface of the transmission rod 104, it moves downward, thus adjusting the position of the connection plate 4. In order to prevent the connection plate 4 from rotating during the movement, causing the two second clamping members 601 to move, both the left and right sides of the top of the forging head 105 are fixedly connected with limit rods 8. The tops of the two limit rods 8 are fixedly connected to the bottom of the cross beam 103. The surfaces of the two limit rods 8 are respectively slidably connected to the left and right sides inside the connection plate 4. The movement direction of the connection plate 4 is restricted by the two limit rods 8, thus preventing the connection plate 4 from rotating. In order to improve the stability of the movable cylinder 203,A plurality of convex rods 9 are fixedly connected to the surface of the movable cylinder 203, and the surfaces of the plurality of convex rods 9 are all slidably connected to the inside of the fixed cylinder 201. The moving direction of the movable cylinder 203 is restricted by the plurality of convex rods 9 to prevent the movable cylinder 203 from rotating, thereby improving the stability of the movable cylinder 203.

[0025] The working principle of the present utility model:

[0026] When forging and processing the rear axle half shaft, the rear axle half shaft is placed inside the movable cylinder 203. By starting the two drive rods 104, the forging cylinder is driven to move downward to forge and process the rear axle half shaft. After the rear axle half shaft is processed, the adjusting ring 703 is rotated. During the rotation of the adjusting ring 703, the adjusting gear 702 is driven to rotate. During the rotation of the adjusting gear 702, the adjusting sleeve 701 is driven to rotate. During the rotation of the adjusting sleeve 701 on the surface of the drive rod 104, it moves downward, causing the connecting plate 4 to move to the bottom. The two drive columns 102 drive the drive rod 104 to move downward. During the movement of the drive rod 104, the connecting plate 4 is driven to move downward. During the movement of the connecting plate 4, the connecting assembly 6 and the extrusion block 5 are driven to move downward. By the extrusion block 5 extruding the first clamping member 301, the first clamping member 301 is driven to move to the right, and the first clamping member 301 is separated from the movable plate 204. During the movement of the connecting plate 4, the second clamping member 601 is driven to move downward. The second clamping member 601 contacts and is extruded by the movable plate 204, driving the second clamping member 601 to move to the right, and the connecting spring 602 deforms. When the bottom of the connecting plate 4 contacts the top of the movable plate 204, the connecting spring 602 rebounds, driving the second clamping member 601 to move to the left, causing the second clamping member 601 to be inserted into the inside of the movable plate 204, thereby fixing the connecting plate 4 and the movable plate 204 stably. The two drive columns 102 are started to drive the connecting plate 4 to move upward. During the movement of the connecting plate 4, the movable cylinder 203 is driven to move upward. The movable cylinder 203 is separated from the fixed cylinder 201. The second clamping member 601 is moved to the right to separate the second clamping member 601 from the movable cylinder 203, and the movable cylinder 203 is disassembled, thereby taking out the rear axle half shaft.

[0027] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0028] The above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, within the scope of the technical solution of the present utility model.

Claims

1. A forging device for producing a rear axle half shaft, comprising a forging device (1) and a lower die (2), characterized in that: The forging device (1) comprises a workbench (101), two transmission columns (102), a crossbeam (103), a transmission rod (104) and a forging head (105); the opposite ends of the two transmission columns (102) are respectively fixedly connected to the left and right sides of the workbench (101); the output ends of the two transmission columns (102) are respectively fixedly connected to the left and right sides of the crossbeam (103); the top of the transmission rod (104) is fixedly connected to the bottom of the crossbeam (103); the top of the forging head (105) is fixedly connected to the bottom of the transmission rod (104); the lower die (2) comprises a fixed cylinder (201), a fixed plate (202), a movable cylinder (203); and a plurality of movable cylinders (204). 3) and a movable plate (204), the surface of the fixed cylinder (201) is fixedly connected to the top of the inside of the workbench (101), the bottom of the fixed plate (202) is fixedly connected to the top of the fixed cylinder (201), the bottom of the fixed plate (202) is fixedly connected to the top of the workbench (101), the surface of the movable cylinder (203) is slidably connected to the inside of the fixed cylinder (201), the bottom of the movable plate (204) is fixedly connected to the top of the movable cylinder (203), the bottom of the movable plate (204) is movably connected to the top of the fixed plate (202), and the fixed components (3) are provided on both the left and right sides of the inside of the fixed plate (202); The forging device (1) is used to perform forging processing on a rear axle half shaft; The lower mold (2) is used to shape the rear axle half shaft; The two fixing assemblies (3) are used to fix the movable cylinder (203).

2. A forging device for producing a rear axle half shaft as claimed in claim 1, characterized in that: The surface of the transmission rod (104) is slidably connected to a connecting plate (4), the left and right sides of the bottom of the connecting plate (4) are fixedly connected to extrusion blocks (5), the interiors of the two extrusion blocks (5) are each provided with a connecting component (6), and the interior of the connecting plate (4) is provided with an adjusting component (7).

3. A forging device for producing a rear axle half shaft as claimed in claim 2, characterized in that: The fixed component (3) on the left side comprises a first clamp (301), a slide bar (302) and a fixed spring (303); the surface of the first clamp (301) is movably connected to the left side inside the fixed plate (202); the side of the first clamp (301) close to the movable plate (204) is movably connected to the left side inside the movable plate (204); the left and right sides of the slide bar (302) are both fixedly connected to the left side inside the fixed plate (202); the surface of the slide bar (302) is slidably connected to the inside of the first clamp (301); the fixed spring (303) is sleeved on the surface of the slide bar (302); the left side of the fixed spring (303) is fixedly connected to the right side of the first clamp (301); the right side of the fixed spring (303) is fixedly connected to the inside of the fixed plate (202); and the top of the surface of the first clamp (301) can be movably connected to the bottom of the left extrusion block (5).

4. A forging device for producing a rear axle half shaft as claimed in claim 2, characterized in that: The connecting assembly (6) on the left side comprises a second clamping member (601), a connecting spring (602) and two sliders (603); the surface of the second clamping member (601) is movably connected to the left side of the interior of the connecting plate (4); the side of the second clamping member (601) close to the left extrusion block (5) is movably connected to the interior of the left extrusion block (5); the left side of the connecting spring (602) is fixedly connected to the right side of the second clamping member (601); the right side of the connecting spring (602) is fixedly connected to the interior of the connecting plate (4); the opposite ends of the two sliders (603) are respectively fixedly connected to the front and rear sides of the second clamping member (601); and the surfaces of the two sliders (603) are both slidably connected to the interior of the connecting plate (4).

5. A forging device for producing a rear axle half shaft as claimed in claim 2, characterized in that: The adjustment assembly (7) comprises an adjustment sleeve (701), an adjustment gear (702), an adjustment ring (703), a limit block (704) and a limit ring (705); the interior of the adjustment sleeve (701) is threadedly connected to the surface of the transmission rod (104); the interior of the adjustment sleeve (701) is movably connected to the interior of the connecting plate (4); the surface of the adjustment gear (702) is meshingly connected to the top of the surface of the adjustment sleeve (701); the interior of the adjustment ring (703) is meshingly connected to the surface of the adjustment gear (702); the top of the limit block (704) is fixedly connected to the bottom of the adjustment gear (702); the surface of the limit block (704) is movably connected to the interior of the connecting plate (4); the top of the limit ring (705) is fixedly connected to the bottom of the adjustment ring (703); and the surface of the adjustment ring (703) is movably connected to the interior of the connecting plate (4).

6. A forging device for producing a rear axle half shaft as claimed in claim 2, characterized in that: The left and right sides of the top of the forging head (105) are fixedly connected to limit rods (8), the tops of the two limit rods (8) are fixedly connected to the bottom of the crossbeam (103), and the surfaces of the two limit rods (8) are slidably connected to the left and right sides of the interior of the connecting plate (4), respectively.