Carburizing and quenching tool for spline shaft

Abstract

The spline shaft carburizing and quenching tool comprises a main sleeve seat, a clamping assembly, a main shaft rod and a driving grip, a motor connected with the top end of the main shaft rod is arranged on the inner side of the driving grip and used for driving the main shaft rod to rotate forwards and backwards, the main sleeve seat is fixedly installed on the surface of the main shaft rod, and a plurality of limiting lugs are arranged on the bottom face of the main sleeve seat. The bottom end of the main shaft rod is fixedly connected with a threaded rod, the clamping assembly comprises a lifting lug, a clamping rod and a linkage rod, the lifting lug is connected to the surface of the threaded rod in a threaded and sleeving mode, and the surface of the lifting lug is movably connected with the surface of the clamping rod through the linkage rod. According to the automatic clamping device for the spline shaft, when the threaded rod rotates to work, the lifting lug ascends along the surface of the threaded rod relative to the main sleeve base, the linkage rod and the clamping rod are pushed to deflect, the movable clamping lug clamps the periphery of the spline shaft, automatic clamping can be achieved, complexity of manual adjustment is reduced, and stability and accuracy in the clamping process are improved.

Description

Technical Field

[0001] This utility model relates to the field of spline shaft carburizing and quenching processing technology, specifically a spline shaft carburizing and quenching tooling. Background Technology

[0002] In existing spline shaft carburizing and quenching processes, traditional manual clamping devices are commonly used to fix and transfer the workpiece. These traditional clamping devices are typically simple in structure, fixing the spline shaft by manually adjusting the clamping force before transferring it to the quenching liquid for carburizing. However, because traditional clamping structures rely on manual adjustment and control of the clamping force, clamping stability and accuracy are difficult to guarantee, and the operation process is cumbersome and inefficient. Furthermore, achieving symmetrical clamping of the workpiece is difficult, leading to workpiece displacement or instability during high-temperature quenching, affecting the consistency of the quenching effect.

[0003] However, as the requirements for machining accuracy and efficiency in carburizing and quenching processes continue to increase, traditional manual clamping devices have revealed the following shortcomings:

[0004] Lack of automatic clamping capability: Traditional clamping devices lack automatic clamping functionality, requiring manual adjustment of clamping force. This not only increases the operator's workload but also makes it difficult to control stability and accuracy during clamping. The lack of a motor-driven forward and reverse rotation structure prevents quick clamping and release through simple operation, reducing work efficiency.

[0005] Multi-point symmetrical clamping is difficult to achieve: Traditional clamping devices mostly use single-point or asymmetrical clamping methods, making it difficult to achieve uniform clamping of splined shafts at multiple points along the circumference. This structural design causes the workpiece to easily shift position during high-temperature quenching, affecting the consistency of carburizing effect and potentially even damaging the workpiece. Traditional devices lack limiting structures, making it impossible to ensure that the clamping force is evenly distributed around the workpiece's outer circumference.

[0006] Therefore, there is an urgent need for an improved clamping fixture that can achieve automatic clamping and motor-driven control of clamping force, and achieve multi-point symmetrical clamping on the outer periphery of the spline shaft to provide a stable and uniform clamping effect, ensuring the stability of the workpiece and the efficiency of operation during the carburizing and quenching process. Utility Model Content

[0007] The present invention aims to solve the technical problems existing in the prior art or related technologies.

[0008] This utility model relates to a spline shaft carburizing and quenching fixture, including a main sleeve, a clamping assembly, a main shaft, and a drive handle. The drive handle has a motor connected to the top of the main shaft on its inner side, used to drive the main shaft to perform forward and reverse rotation. The main sleeve is fixedly installed on the surface of the main shaft, and its bottom surface has several limiting ears for limiting the clamping assembly. A threaded rod is fixedly connected to the bottom end of the main shaft. The clamping assembly includes a lifting ear, a clamping rod, and a linkage rod. The lifting ear is threaded onto the surface of the threaded rod and is movably connected to the surface of the clamping rod via the linkage rod. The connection point between the lifting ear and the linkage rod is located on the surface of the limiting ear and slides. A movable clamping ear for clamping the spline shaft surface is movably installed at the bottom end of the clamping rod, while a top pressure cap for abutting against the top of the spline shaft is rotatably installed at the bottom end of the threaded rod. Driven by the motor of the drive handle, the operator can easily control the forward and reverse rotation of the spindle, causing the threaded rod to push the lifting lug to rise or fall along its surface, realizing the automatic deflection of the linkage rod and clamping rod, and automatically clamping the outer circumference of the spline shaft through the moving clamping lug, simplifying the operation process and improving work efficiency.

[0009] In a preferred embodiment, this utility model can be further configured such that: the drive grip is a heat-insulating shell structure, and an internal battery is provided as a power source for the motor; the surface of the drive grip is provided with a switch for controlling the forward and reverse rotation of the motor; and the drive grip is ergonomically designed and shaped like a handle. The heat insulation design and the internal battery power supply ensure the safety of the operator in high-temperature environments. The ergonomic grip design and the control switch make motor operation simpler and more convenient, further improving the operating comfort and efficiency of the tooling.

[0010] In a preferred embodiment, this invention can be further configured such that a detachable coupling is provided between the top end of the main shaft and the output end of the motor, and the main shaft is located on the axis of the main sleeve. Connecting the motor and the main shaft via the detachable coupling facilitates disassembly and maintenance, makes the replacement of the motor assembly more flexible, extends the service life of the tooling, and ensures that the main shaft is located on the axis of the main sleeve during operation, thus guaranteeing the stability of the device.

[0011] In a preferred embodiment, this invention can be further configured such that: both ends of the linkage rod are provided with pins that are respectively connected to the surfaces of the lifting lug and the clamping rod, and the connecting pins of the lifting lug and the clamping rod are slidably mounted on the surface of the limiting lug. By connecting the linkage rod to the lifting lug and the clamping rod with pins at both ends and sliding on the surface of the limiting lug, the deflection freedom of the clamping rod is increased, allowing the clamping assembly to better adapt to splined shafts of different sizes, further improving the adaptability and flexibility of the clamping fixture.

[0012] In a preferred embodiment, this invention can be further configured such that: the number of linkage rods and clamping rods is several sets, and they are arranged one-to-one with the limiting ears. The linkage rods and clamping rods are evenly distributed circumferentially on the outer periphery of the main shaft. The multiple sets of linkage rods and clamping rods evenly distributed circumferentially on the outer periphery of the main shaft ensure multi-point symmetrical clamping of the spline shaft by the moving clamping ears, providing a stable and uniform clamping force, preventing displacement of the workpiece during carburizing and quenching, and ensuring clamping stability.

[0013] In a preferred embodiment, the present invention can be further configured such that the top pressure cap is a magnetic block structure, and the bottom surface of the top pressure cap has a groove adapted to the top of the spline shaft. By designing the top pressure cap as a magnetic block structure, it can better connect with the top of the spline shaft, providing additional stability, and the groove ensures that it fits snugly with the top of the spline shaft, preventing loosening during clamping and transportation.

[0014] In a preferred embodiment, this invention can be further configured such that: one side of the movable clamping lug is provided with an arc-shaped abutment groove adapted to the surface of the spline shaft, and the movable clamping lug is rotatably connected to the bottom end of the clamping rod. By providing an arc-shaped abutment groove on one side of the movable clamping lug, it better fits the spline shaft surface, providing higher clamping force, ensuring that the spline shaft can be firmly fixed during carburizing and quenching, preventing loosening during clamping, and improving the clamping accuracy and reliability.

[0015] By adopting the above technical solution, this utility model achieves efficient clamping and stable transfer of spline shafts through the inclusion of motor drive, automatic clamping, multi-point symmetrical clamping, and magnetic blocks. This fixture is characterized by convenient operation, strong adaptability, and high efficiency and stability, making it particularly suitable for the carburizing and quenching process of spline shafts, thus improving machining accuracy and operational efficiency.

[0016] The beneficial effects achieved by this utility model are as follows:

[0017] 1. In this utility model, during the rotation of the threaded rod, the lifting lug moves upward relative to the main sleeve, pushing the linkage rod and clamping rod to deflect, so that the moving clamping lug clamps the outer circumference of the spline shaft. This enables automatic clamping, reduces the complexity of manual adjustment, and improves the stability and accuracy of the clamping process. Furthermore, the main spindle is driven to rotate forward and backward by a motor inside the drive handle. The operator can control the rotation direction of the main spindle through the power button on the drive handle surface, making operation simple and improving work efficiency.

[0018] 2. In this utility model, multiple sets of linkage rods and clamping rod structures are evenly distributed in the circumferential direction on the outer periphery of the main shaft, and are limited by limiting ears to ensure that the moving clamping ears clamp the outer periphery of the spline shaft at multiple points symmetrically, providing a stable and uniform clamping force and preventing the workpiece from shifting during the carburizing and quenching process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the main sleeve according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the clamping component structure according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the clamping component installation structure according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the main shaft and drive grip structure according to one embodiment of the present invention.

[0024] Figure label:

[0025] 100. Main sleeve; 110. Limiting ear; 200. Clamping assembly; 210. Lifting ear; 220. Clamping rod; 230. Linkage rod; 221. Moving clamping ear; 300. Main spindle; 310. Threaded rod; 320. Top pressure cap; 400. Drive grip. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0028] The following is in conjunction with the appendix Figures 1-5 This invention describes a spline shaft carburizing and quenching fixture provided by some embodiments of the present invention.

[0029] This utility model provides a spline shaft carburizing and quenching tooling, such as Figures 1 to 5 As shown, the assembly includes a main sleeve 100, a clamping component 200, a main spindle 300, and a drive handle 400. The drive handle 400 has a motor connected to the top of the main spindle 300 on its inner side, which drives the main spindle 300 to rotate in both directions. The operator holds the drive handle 400 and controls the motor's rotation direction via a control switch on its surface, enabling convenient operation of the main spindle 300's rotation direction. The main sleeve 100 is fixedly mounted on the surface of the main spindle 300, and its bottom surface has several limiting ears 110 for limiting and controlling the vertical movement of the clamping component 200.

[0030] In this embodiment, a threaded rod 310 is fixedly connected to the bottom end of the main spindle 300, and a lifting lug 210 is threaded onto the surface of the threaded rod 310. The lifting lug 210 rises or falls along the surface of the threaded rod 310 when it rotates, thereby causing the linkage rod 230 and the clamping rod 220 to deflect. Specifically, both ends of the linkage rod 230 are connected to the lifting lug 210 and the clamping rod 220 respectively via pins, and the pins are slidably mounted on the surface of the limiting lug 110, providing the clamping rod 220 with deflection freedom, allowing the bottom end of the clamping rod 220 to clamp splined shafts of different diameters.

[0031] Furthermore, the movable clamping ear 221 in the clamping assembly 200 is rotatably connected to the bottom end of the clamping rod 220, and has an arc-shaped abutment groove on one side that matches the surface of the spline shaft, so that it can fit against the outer peripheral surface of the spline shaft during clamping, achieving stable clamping. To enhance the fixation of the top end, a magnetic suction block top cap 320 is installed at the bottom end of the threaded rod 310, and the bottom surface of the top cap 320 has a sleeve groove that matches the top end of the spline shaft. Through the design of the magnetic suction block, the spline shaft can be firmly attracted to the top cap 320, further improving the clamping stability.

[0032] Working effect: During operation, the operator uses the hand-held drive handle 400 and the control switch to control the forward and reverse rotation of the motor, realizing the rotation of the spindle 300 and the clamping assembly 200. The magnetic block top pressure cap 320 ensures a stable connection at the top of the spline shaft, and the multi-point symmetrical clamping structure improves the stability of clamping, making it suitable for achieving efficient and precise fixation in the carburizing and quenching process of spline shafts.

[0033] In another embodiment, the present invention further optimizes the spline shaft carburizing and quenching fixture to adapt to different operational requirements and enhance safety. The fixture in this embodiment also includes a main sleeve 100, a clamping assembly 200, a spindle 300, and a drive handle 400, but the structural design has been further adjusted to improve the adaptability and durability of the equipment.

[0034] In this embodiment, the drive grip 400 is a heat-insulating shell structure, with heat-insulating material covering the outer layer to ensure the safety of the operator's hands during the high-temperature quenching process. A built-in battery is located inside the drive grip 400, providing power to the motor and enabling the tooling to operate independently without an external power source. Simultaneously, the ergonomically designed grip, combined with the heat-insulating shell structure, provides the operator with a comfortable grip experience.

[0035] In this embodiment, the spindle 300 is connected to the output end of the motor via a detachable coupling, facilitating disassembly and maintenance. Several sets of linkage rods 230 and clamping rods 220 are evenly arranged circumferentially on the spindle 300, corresponding one-to-one with the limiting ears 110. This uniform distribution of multiple structures in the circumferential direction achieves multi-point symmetrical clamping, ensuring the spline shaft is firmly fixed in a high-temperature environment and effectively preventing workpiece displacement during quenching.

[0036] Furthermore, the movable clamping lug 221 and the top pressure cap 320 have been optimized for adaptation. The movable clamping lug 221 is connected to the bottom end of the clamping rod 220, allowing it to rotate around the connection point to adjust the angle, making it easy to adapt to different spline shaft outer diameters. At the same time, the adsorption force of the magnetic block top pressure cap 320 has been increased, so that the spline shaft can still be stably held in the clamping position even during long-term quenching treatment.

[0037] Performance: Thanks to its heat-insulating casing and built-in battery design, the equipment can operate safely at high temperatures and offers convenient power configuration. Simultaneously, the evenly distributed multiple sets of linkage rods 230 and clamping rods 220 structure achieve multi-point symmetrical clamping of the spline shaft, ensuring high stability and clamping accuracy of the workpiece during carburizing and quenching. The use of a detachable coupling enhances the ease of maintenance.

[0038] Working principle and usage process of this utility model:

[0039] During the carburizing and quenching process of the spline shaft, the operator holds the drive handle 400 to align the top cap 320 with the top of the spline shaft, and presses the power button on the surface of the drive handle 400. This causes the motor inside the drive handle 400 to drive the main shaft 300 to rotate. As the threaded rod 310 rotates, the lifting lug 210 moves upward relative to the main sleeve 100 along the surface of the threaded rod 310, thereby deflecting the linkage rod 230 and the clamping rod 220. The moving clamping lug 221 clamps the outer circumference of the spline shaft, enabling the rapid tooling transfer of the spline shaft to the quenching liquid for carburizing treatment. By controlling the motor to rotate in the opposite direction, the spline shaft can be quickly removed, improving the spline shaft tooling transfer rate.

[0040] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A carburizing and quenching fixture for a splined shaft, characterized in that, include: The assembly comprises a main sleeve (100), a clamping assembly (200), a main spindle (300), and a drive handle (400). The drive handle (400) has a motor connected to the top of the main spindle (300) on its inner side, used to drive the main spindle (300) to rotate forward and backward. The main sleeve (100) is fixedly mounted on the surface of the main spindle (300), and the bottom surface of the main sleeve (100) has several limiting ears (110). A threaded rod (310) is fixedly connected to the bottom end of the main spindle (300). The clamping assembly (200) includes a lifting ear (210), a clamping rod (…), and a… 220) and linkage rod (230), the lifting ear (210) is threaded onto the surface of the threaded rod (310), and the surface of the lifting ear (210) is movably connected to the surface of the clamping rod (220) through the linkage rod (230). The connection point between the lifting ear (210) and the linkage rod (230) is located on the surface of the limiting ear (110) and slides. The bottom end of the clamping rod (220) is movably installed with a movable clamping ear (221) for clamping the surface of the spline shaft. The bottom end of the threaded rod (310) is rotatably installed with a top pressure cap (320) for abutting against the top of the spline shaft.

2. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, The drive grip (400) has a heat-insulating shell structure and an internal battery as a power source for the motor. The surface of the drive grip (400) is provided with a switch for controlling the forward and reverse rotation of the motor, and the drive grip (400) is ergonomically designed in the shape of a grip.

3. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, The top end of the main shaft (300) is provided with a detachable coupling to the output end of the motor, and the main shaft (300) is located on the axis of the main sleeve (100).

4. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, Both ends of the linkage rod (230) are provided with shaft pins that are respectively connected to the surfaces of the lifting ear (210) and the clamping rod (220), and the shaft pin connecting the lifting ear (210) and the clamping rod (220) is slidably installed on the surface of the limiting ear (110).

5. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, The number of linkage rods (230) and clamping rods (220) is several sets and they are arranged one-to-one with the limiting ears (110). The linkage rods (230) and clamping rods (220) are evenly distributed in the circumferential direction on the outer periphery of the main shaft (300).

6. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, The top pressure cap (320) is a magnetic block structure, and the bottom surface of the top pressure cap (320) is provided with a groove that matches the top of the spline shaft.

7. The spline shaft carburizing and quenching fixture according to claim 1, characterized in that, The movable clamp (221) has an arc-shaped groove on one side that is adapted to the surface of the spline shaft, and the movable clamp (221) is rotatably connected to the bottom end of the clamp rod (220).

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