A spline shaft heat treatment fixture

Abstract

The utility model relates to the technical field of heat treatment fixtures, and discloses a spline shaft heat treatment fixture, comprising a herringbone frame, wherein the herringbone frame is provided with a plurality of rectangular notches, the herringbone frame is connected to a hoisting rod, a first slide bar is installed at the top end of the hoisting rod, the first slide bar moves in the rectangular notch on the herringbone frame, a fan plate is installed on the hoisting rod, an electric telescopic rod is installed on the herringbone frame, a fixing piece is coaxially arranged on the electric telescopic rod, the fixing piece is connected to the fan plate through an action rod, the telescopic rod is installed on the hoisting rod, a plurality of auxiliary plates are arranged at the bottom end of the telescopic rod, and a sliding block is fixed on the auxiliary plate. The utility model adopts a fan plate installed on the hoisting rod, the fixing piece is connected to the fan plate through an action rod, and the hoisting rod is moved by pushing and pulling the action rod, thereby adjusting the inner diameter of the fixture, so that the fixture can fix spline shafts of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment fixtures, in particular to a spline shaft heat treatment fixture. Background Art

[0002] The spline shaft is a kind of mechanical transmission part. It has the same function as the flat key, semicircular key and bevel key, which are all used to transmit mechanical torque. There are longitudinal keyways on the surface of the shaft, and the rotating parts sleeved on the shaft also have corresponding keyways, which can keep rotating synchronously with the shaft. While rotating, some can also slide longitudinally on the shaft, such as the gearbox shift gear. The processing of the spline shaft includes a series of heat treatments such as normalizing, quenching and low-temperature tempering. During the heat treatment process, the spline shaft needs to be fixed by a fixture. The fixing effect will directly affect the production quality of the spline shaft.

[0003] Existing spline shaft heat treatment fixtures often use hooks and locating rings to lift and fix the spline shaft. The locating ring cannot be adjusted according to the length of the spline shaft when fixing the spline shaft, resulting in the contact point between the locating ring and the spline shaft not matching the center of gravity of the spline shaft, thereby causing the spline shaft to shift. In addition, the inner diameter of the locating ring is fixed, and spline shafts with different inner diameters cannot be fixed, resulting in poor adaptability of the fixture.

[0004] Therefore, we designed a spline shaft heat treatment fixture. Utility Model Content

[0005] The utility model aims to solve the problem that the clamp in the prior art cannot fix the spline shafts with different inner diameters and the spline shafts are offset during the fixing process, and proposes a spline shaft heat treatment clamp.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A spline shaft heat treatment fixture comprises an A-frame, a plurality of rectangular notches are formed on the A-frame, the A-frame is connected to a hoisting rod, a first slide bar is installed at the top of the hoisting rod, the first slide bar moves in the rectangular notch on the A-frame, a fan plate is installed on the hoisting rod, an electric telescopic rod is installed on the A-frame, a fixing piece is coaxially arranged on the electric telescopic rod, the fixing piece is connected to the fan plate via an action rod, a telescopic rod is installed on the hoisting rod, a plurality of auxiliary plates are arranged at the bottom of the telescopic rod, and a sliding block is fixed on the auxiliary plate.

[0008] Preferably, the hoisting rod and the A-frame are located in the same vertical plane, the hoisting rod and the telescopic rod always keep synchronous movement, and the hoisting rod is perpendicular to the bottom end of the A-frame.

[0009] Preferably, the hanging rod is provided with a plurality of strip-shaped slots, and the sliding block is provided with a second sliding rod, and the second sliding rod moves in the strip-shaped slots on the hanging rod.

[0010] Preferably, the hoisting rod and the auxiliary plate are both provided with shaft rods, one end of the telescopic rod is rotatably connected to the hoisting rod via the shaft rod, and the other end of the telescopic rod is rotatably connected to the auxiliary plate via the shaft rod.

[0011] Preferably, an action rod is provided on both sides of the fixing member, the action rod is rotatably connected to the fixing member, and a plurality of the action rods are respectively connected to both sides of the fan plate.

[0012] Preferably, the bottom end of the auxiliary plate is connected to a bottom plate, a clamping block is mounted on the bottom plate, and the clamping block is in a curved shape.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model adopts a fan plate installed on the lifting rod, and the fixing piece is connected to the fan plate through an action rod. The lifting rod is moved by pushing and pulling the action rod, thereby adjusting the inner diameter of the clamp, so that the clamp can fix spline shafts of different sizes.

[0015] 2. The utility model adopts an auxiliary plate disposed at the bottom end of the telescopic rod, on which a sliding block is fixed, and the auxiliary plate is lifted and lowered by the movement of the telescopic rod, thereby adjusting the contact point between the clamp and the spline shaft to avoid the deviation of the spline shaft.

[0016] In summary, the utility model is reasonably designed and can not only fix spline shafts of different sizes, but also prevent the spline shafts from shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a spline shaft heat treatment fixture proposed by the utility model;

[0018] Figure 2 This is a front view of a spline shaft heat treatment fixture proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the lifting structure of a spline shaft heat treatment fixture proposed by the utility model;

[0020] Figure 4 The utility model is a schematic diagram of a distance adjustment structure of a spline shaft heat treatment fixture.

[0021] In the figure: 1, A-frame; 2, electric telescopic rod; 3, lifting rod; 4, first slide bar; 5, fan plate; 6, fixing piece; 7, action rod; 8, telescopic rod; 9, auxiliary plate; 10, sliding block; 11, second slide bar; 12, bottom plate; 13, clamping block. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4 A spline shaft heat treatment fixture comprises a herringbone frame 1, a plurality of rectangular notches are provided on the herringbone frame 1, the herringbone frame 1 is connected to a hoisting rod 3, a first slide bar 4 is installed on the top of the hoisting rod 3, the first slide bar 4 moves in the rectangular notch on the herringbone frame 1, a fan plate 5 is installed on the hoisting rod 3, an electric telescopic rod 2 is installed on the herringbone frame 1, a fixing member 6 is coaxially arranged on the electric telescopic rod 2, the fixing member 6 is connected to the fan plate 5 through an action rod 7, the bottom end of the auxiliary plate 9 is connected to a bottom plate 12, a clamping block 13 is installed on the bottom plate 12, and the clamping block 13 is in a curved surface shape. By starting the electric telescopic rod 2, the electric telescopic rod 2 is The retracting rod 2 performs telescopic movement, and the movement of the electric telescopic rod 2 drives the fixing part 6 to move synchronously. The movement of the fixing part 6 will drive the action rod 7. The length of the action rod 7 is fixed. During the movement, a push-pull force will be formed on the fan plate 5. The movement of the fan plate 5 will drive the lifting rod 3 to move. The first sliding rod 4 on the lifting rod 3 slides synchronously in the rectangular groove on the herringbone frame 1, so that the lifting rod 3 can maintain stable movement. The movement of the lifting rod 3 drives the clamping plate 13 to move synchronously, so that the clamping plate 13 can clamp and fix spline shafts with different inner diameters, thereby improving the adaptability of the clamp.

[0023] A telescopic rod 8 is installed on the hoisting rod 3, and a plurality of auxiliary plates 9 are arranged at the bottom end of the telescopic rod 8. A sliding block 10 is fixed on the auxiliary plate 9. The hoisting rod 3 and the herringbone frame 1 are located in the same vertical plane, and the hoisting rod 3 and the telescopic rod 8 always keep synchronous movement. The hoisting rod 3 is perpendicular to the bottom end of the herringbone frame 1, and a plurality of strip grooves are opened on the hoisting rod 3. A second slide bar 11 is installed on the sliding block 10, and the second slide bar 11 moves in the strip groove on the hoisting rod 3. A shaft rod is arranged on the hoisting rod 3 and the auxiliary plate 9. One end of the telescopic rod 8 is connected to the hoisting rod 3 by rotation of the shaft rod, and the other end of the telescopic rod 8 is connected to the auxiliary plate 9 by rotation of the shaft rod. Both sides of the fixing member 6 are provided with There is an action rod 7, which is rotatably connected to the fixing part 6. Multiple action rods 7 are respectively connected to both sides of the fan plate 5. When the auxiliary plate 9 is lifted and lowered in the vertical direction, the telescopic rod 8 is contracted, and the lifting and lowering movement of the auxiliary plate 9 is achieved while balancing the auxiliary plate 9. The auxiliary plate 9 drives the sliding block 10 to move while being lifted and lowered, so that the second sliding bar 11 on the sliding block 10 is lifted and lowered in multiple strip grooves on the lifting rod 3. The clamping block 13 in the clamp can be adjusted in the vertical direction through the sliding block 10 and the telescopic rod 8 to avoid the spline shaft position offset caused by the mismatch between the position of the clamp fixing point and the center of gravity of the spline shaft.

[0024] The spline shaft heat treatment fixture described in the utility model comprises the above-mentioned components and the same components mirror-imaged with the electric telescopic rod 2 as the axis. The mirror-image components have the same size and model as the above-mentioned components. The telescopic rod 8 and the auxiliary plate 9 always maintain the same lifting and lowering direction as the components with which they are mirrored. The lifting rod 3, the action rod 7 and the clamping plate 13 always maintain opposite or opposite translational directions as the components with which they are mirrored.

[0025] The working principle of the utility model is as follows: a plurality of rectangular notches are provided on the herringbone frame 1, the herringbone frame 1 is connected with a hanging rod 3, a first slide bar 4 is installed at the top of the hanging rod 3, the first slide bar 4 moves in the rectangular notch on the herringbone frame 1, a fan plate 5 is installed on the hanging rod 3, an electric telescopic rod 2 is installed on the herringbone frame 1, the electric telescopic rod 2 is coaxially provided with a fixing member 6, the fixing member 6 is connected to the fan plate 5 through an action rod 7, a telescopic rod 8 is installed on the hanging rod 3, a plurality of auxiliary plates 9 are arranged at the bottom end of the telescopic rod 8, a sliding block 10 is fixed on the auxiliary plate 9, the hanging rod 3 is moved by the movement of the electric telescopic rod 2, so as to adjust the fixture to fix the spline shafts with different inner diameters, and at the same time, the auxiliary plate 9 is moved to make the fixture fixing point coincide with the center of gravity of the spline shaft to avoid the position displacement of the spline shaft.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spline shaft heat treatment fixture, comprising a herringbone frame (1), characterized in that: The herringbone frame (1) is provided with a plurality of rectangular notches. The herringbone frame (1) is connected to a hoisting rod (3). A first sliding rod (4) is installed at the top end of the hoisting rod (3). The first sliding rod (4) moves in the rectangular notch on the herringbone frame (1). A fan plate (5) is installed on the hoisting rod (3). An electric telescopic rod (2) is installed on the herringbone frame (1). A fixing member (6) is coaxially arranged on the electric telescopic rod (2). The fixing member (6) is connected to the fan plate (5) via an action rod (7). A telescopic rod (8) is installed on the hoisting rod (3). A plurality of auxiliary plates (9) are arranged at the bottom end of the telescopic rod (8). A sliding block (10) is fixed on the auxiliary plate (9).

2. A spline shaft heat treatment fixture according to claim 1, characterized in that: The hoisting rod (3) and the herringbone frame (1) are located on the same vertical plane, the hoisting rod (3) and the telescopic rod (8) always maintain synchronous movement, and the hoisting rod (3) is perpendicular to the bottom end of the herringbone frame (1).

3. A spline shaft heat treatment fixture according to claim 1, characterized in that: The hanging rod (3) is provided with a plurality of strip-shaped slots, and the sliding block (10) is provided with a second sliding rod (11), and the second sliding rod (11) moves in the strip-shaped slots on the hanging rod (3).

4. A spline shaft heat treatment fixture according to claim 1, characterized in that: The hoisting rod (3) and the auxiliary plate (9) are both provided with shaft rods, one end of the telescopic rod (8) is rotatably connected to the hoisting rod (3) via the shaft rod, and the other end of the telescopic rod (8) is rotatably connected to the auxiliary plate (9) via the shaft rod.

5. The spline shaft heat treatment fixture according to claim 1, characterized in that: An action rod (7) is provided on both sides of the fixing member (6), the action rod (7) is rotatably connected to the fixing member (6), and a plurality of the action rods (7) are respectively connected to both sides of the fan plate (5).

6. The spline shaft heat treatment fixture according to claim 1, characterized in that: The bottom end of the auxiliary plate (9) is connected to a bottom plate (12), a clamping block (13) is mounted on the bottom plate (12), and the clamping block (13) is in a curved shape.

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