A spline shaft machining clamping device

Abstract

This utility model relates to a splined shaft machining clamping device, including a first clamping module, a first support module, and a second support module. The first support module and the second support module are symmetrically arranged on the left and right sides of the first clamping module. The first clamping module includes a sleeve, a square tube, a hydraulic cylinder, an upper arc plate, and a lower arc plate. In use, the hydraulic cylinder drives the lower arc plate to move upward and align with the upper arc plate. At this time, the upper arc plate and the lower arc plate form a cylindrical tube for clamping the shaft. Therefore, the upper arc plate and the lower arc plate need to be detachable to facilitate the replacement of upper arc plates and lower arc plates of different sizes to clamp shafts of different sizes. When machining the spline groove, the shaft is machined by milling. Therefore, in order to avoid the shaft being subjected to unbalanced force when the milling cutter presses down to mill both ends of the shaft, the first support module and the second support module are set at the bottom of the left and right ends of the shaft to support the bottom of the shaft ends.

Description

Technical Field

[0001] This utility model relates to the field of shaft parts processing technology, and in particular to a spline shaft processing clamping device. Background Technology

[0002] When using shaft-type parts, various keyways need to be made on them to avoid a relative speed difference between the parts fitted on the shaft and the shaft during high-speed rotation after assembly. All components will deform under the pull of centrifugal force during ultra-high-speed rotation, so keyed shafts are needed to further avoid the relative speed difference after deformation. How to industrialize and refine the keyway machining of shafts is therefore very important. Utility Model Content

[0003] The purpose of this invention is to provide a spline shaft machining clamping device to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A spline shaft machining clamping device includes a first clamping module, a first support module, and a second support module. The first support module and the second support module are symmetrically arranged on the left and right sides of the first clamping module, and the first support module and the second support module have the same structure.

[0006] The first clamping module includes a sleeve, a square tube, a hydraulic cylinder, an upper arc plate, and a lower arc plate. The square tube is vertically arranged, the hydraulic cylinder is fixedly installed at the inner bottom of the square tube, and the sleeve is fixedly installed at the top of the square tube. The axis of the sleeve is in the left-right direction, and both ends of the sleeve are completely open. The bottom of the sleeve is provided with a clearance hole communicating with the inside of the square tube. The push rod of the hydraulic cylinder passes through the clearance hole and extends into the inside of the sleeve. The lower arc plate is detachably installed at the top of the hydraulic cylinder, and the upper arc plate is detachably installed at the inner top of the sleeve. The axis of both the upper and lower arc plates is in the left-right direction.

[0007] By adopting the above technical solution, during use, the hydraulic cylinder drives the lower arc plate to move upward and align with the upper arc plate. At this time, the upper and lower arc plates form a cylindrical tube for clamping the shaft. Therefore, the upper and lower arc plates need to be detachable to facilitate the replacement of upper and lower arc plates of different sizes to clamp shafts of different sizes. When machining the spline groove of the shaft, it is machined by milling. Therefore, in order to avoid the shaft being subjected to unbalanced force when the milling cutter presses down to mill both ends of the shaft, the first support module and the second support module are set at the bottom of the left and right ends of the shaft to support the bottom of both ends of the shaft. This device is mainly designed to facilitate the machining of short shafts. When machining short shafts, the milling cutter descends from above. In order to avoid the machine tool spindle hitting the fixture, the upper and lower arc plates are set in the sleeve to clamp the shaft, which facilitates the machining of spline grooves at both ends of the shaft.

[0008] In a further embodiment, the first support module includes a telescopic cylinder and a support block. The support block is fixedly installed on the top of the telescopic cylinder. The telescopic cylinder is used to drive the support block to move up and down. The top of the support block is provided with an arc-shaped groove. The axis of the arc-shaped groove is in the left-right direction, and both the left and right ends of the arc-shaped groove are completely through it.

[0009] By adopting the above technical solution, the support block needs to be made of copper to avoid scratching the surface of the shaft parts due to excessive hardness. The telescopic cylinder needs to be an adjustable cylinder model because the diameter of the shaft to be processed may be different. Therefore, the telescopic cylinder needs to be adjusted once when processing different batches of shaft parts.

[0010] In a further embodiment, the support block of the first support module has an upward first protrusion at its top left side, and the periphery of the first protrusion has a blunted acute angle shape. The support block of the second support module has an upward second protrusion at its top right side, and the periphery of the second protrusion has a blunted acute angle shape.

[0011] By adopting the above technical solution, in order to ensure processing accuracy during use, the first protrusion and the second protrusion can limit the left and right position of the shaft parts. When dealing with shaft parts of different sizes, the first protrusion and the second protrusion can be set separately and bolted to the support block to replace the first protrusion and the second protrusion, so that they can cooperate with the shaft parts to be processed. Therefore, the first support module and the second support module are symmetrically arranged on the left and right sides relative to the first clamping module.

[0012] In a further embodiment, the top of the sleeve is provided with a plurality of through holes at equal intervals from left to right, and a bolt passes through the through holes. One end of the bolt located inside the sleeve is screwed and fixed to the upper arc plate, and a limit nut is screwed onto the section of the bolt located inside the sleeve.

[0013] By adopting the above technical solution, multiple threaded holes corresponding one-to-one with the through holes need to be set on the top of the upper arc plate. Then, the bolt is inserted into the through hole from the top and screwed into the upper arc plate for fixation. Then, the position of the limit nut is adjusted so that the top position of the upper arc plate is restricted. Generally speaking, in order to make the clamping effect of the upper arc plate better, a nut needs to be screwed on the end of the bolt located outside the sleeve to completely restrict the position of the upper arc plate. At the same time, multiple through holes need to be staggered to avoid the upper arc plate from shaking.

[0014] In a further embodiment, the upper and lower arc plates are made of 45 steel, and the periphery of both the upper and lower arc plates has been chamfered.

[0015] By adopting the above technical solution, 45 steel can meet the hardness requirements of the clamping fixture, and after appropriate heat treatment, its hardness will be significantly lower than that of bearing steel. After the sharp corners are blunted, the periphery will not scratch the surface of shaft parts.

[0016] In a further embodiment, a pressure sensor is provided on the contact surface between the lower arc plate and the hydraulic cylinder.

[0017] By adopting the above technical solution, the pressure sensor is placed on the contact surface between the top of the hydraulic cylinder and the lower arc plate, which ensures that the clamping pressure is fixed each time, making it more conducive to batch processing.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. During use, the hydraulic cylinder drives the lower arc plate to move upward and align with the upper arc plate. At this time, the upper and lower arc plates form a cylindrical tube for clamping the shaft. Therefore, the upper and lower arc plates need to be detachable to facilitate the replacement of upper and lower arc plates of different sizes to clamp shafts of different sizes. The shaft is machined by milling when processing spline grooves. Therefore, in order to avoid the shaft being subjected to unbalanced force when the milling cutter presses down to mill both ends of the shaft, the first support module and the second support module are set at the bottom of the left and right ends of the shaft to support the bottom of both ends of the shaft. This device is mainly designed to facilitate the processing of short shafts. When processing short shafts, the milling cutter descends from above. In order to avoid the machine tool spindle hitting the fixture, the upper and lower arc plates are set in the sleeve to clamp the shaft, which facilitates the processing of spline grooves at both ends of the shaft. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2This is a structural schematic diagram illustrating the first clamping module of this utility model.

[0022] In the figure, 1 is the first clamping module; 11 is the sleeve; 12 is the square tube; 13 is the hydraulic cylinder; 14 is the upper arc plate; 15 is the lower arc plate; 2 is the first support module; 3 is the second support module; 21 is the telescopic cylinder; and 22 is the support block. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0025] Example 1:

[0026] like Figures 1-2 As shown, a spline shaft machining clamping device includes a first clamping module 1, a first support module 2, and a second support module 3. The first support module 2 and the second support module 3 are symmetrically arranged on the left and right sides of the first clamping module 1, and the structures of the first support module 2 and the second support module 3 are identical.

[0027] The first clamping module 1 includes a sleeve 11, a square tube 12, a hydraulic cylinder 13, an upper arc plate 14, and a lower arc plate 15. The square tube 12 is vertically arranged. The hydraulic cylinder 13 is fixedly installed at the inner bottom of the square tube 12. The sleeve 11 is fixedly installed at the top of the square tube 12. The axis of the sleeve 11 is in the left-right direction. Both ends of the sleeve 11 are completely open. The bottom of the sleeve 11 is provided with a clearance hole communicating with the inside of the square tube 12. The push rod of the hydraulic cylinder 13 passes through the clearance hole and extends into the inside of the sleeve 11. The lower arc plate 15 is detachably installed at the top of the hydraulic cylinder 13. The upper arc plate 14 is detachably installed at the inner top of the sleeve 11. The axis of both the upper arc plate 14 and the lower arc plate 15 is in the left-right direction. The first support module 2 includes a telescopic cylinder 21 and a support block 22. The support block 22 is fixedly installed at the top of the telescopic cylinder 21. The telescopic cylinder 21 is used to drive the support block 22. The support block 22 moves up and down. The top of the support block 22 has an arc-shaped groove with its axis pointing left and right, and both ends of the groove are fully through. The top left side of the support block 22 of the first support module 2 has an upward-facing first protrusion with a blunted acute-angled periphery. The top right side of the support block 22 of the second support module 3 has an upward-facing second protrusion with a blunted acute-angled periphery. The top of the sleeve 11 has multiple through holes spaced evenly from left to right. Bolts pass through these holes, and one end of the bolt inside the sleeve 11 is screwed to the upper arc plate 14. A limit nut is screwed onto the section of the bolt inside the sleeve 11. The upper arc plate 14 and the lower arc plate 15 are made of 45 steel, and both have blunted acute-angled peripheries. A pressure sensor is installed on the contact surface between the lower arc plate 15 and the hydraulic cylinder 13.

[0028] Specific implementation process: During use, the hydraulic cylinder drives the lower arc plate to move upward and align with the upper arc plate. At this time, the upper and lower arc plates form a cylindrical tube for clamping the shaft. Therefore, the upper and lower arc plates need to be detachable to facilitate the replacement of upper and lower arc plates of different sizes to clamp shafts of different sizes. The shaft is machined by milling when processing spline grooves. Therefore, in order to avoid the shaft being subjected to unbalanced force when the milling cutter presses down to mill both ends of the shaft, the first support module and the second support module are set at the bottom of the left and right ends of the shaft to support the bottom of both ends of the shaft. This device is mainly designed to facilitate the processing of short shafts. When processing short shafts, the milling cutter descends from above. In order to avoid the machine tool spindle hitting the fixture, the upper and lower arc plates are set inside the sleeve to clamp the shaft, which facilitates the processing of spline grooves at both ends of the shaft.

[0029] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A spline shaft machining clamping device characterized by: It includes a first clamping module (1), a first support module (2), and a second support module (3). The first support module (2) and the second support module (3) are symmetrically arranged on the left and right sides of the first clamping module (1). The first support module (2) and the second support module (3) have the same structure. The first clamping module (1) includes a sleeve (11), a square tube (12), a hydraulic cylinder (13), an upper arc plate (14), and a lower arc plate (15). The square tube (12) is vertically arranged. The hydraulic cylinder (13) is fixedly installed at the bottom of the square tube (12). The sleeve (11) is fixedly installed at the top of the square tube (12). The axis of the sleeve (11) is in the left-right direction. Both the left and right ends of the sleeve (11) are completely open. The bottom of the sleeve (11) is provided with a clearance hole that communicates with the inside of the square tube (12). The push rod of the hydraulic cylinder (13) passes through the clearance hole and extends into the inside of the sleeve (11). The lower arc plate (15) is detachably installed at the top of the hydraulic cylinder (13). The upper arc plate (14) is detachably installed at the top of the sleeve (11). The axis of both the upper arc plate (14) and the lower arc plate (15) is in the left-right direction.

2. The spline shaft machining clamping device according to claim 1, characterized in that: The first support module (2) includes a telescopic cylinder (21) and a support block (22). The support block (22) is fixedly installed on the top of the telescopic cylinder (21). The telescopic cylinder (21) is used to drive the support block (22) to move up and down. The top of the support block (22) is provided with an arc-shaped groove. The axis of the arc-shaped groove is in the left-right direction, and both the left and right ends of the arc-shaped groove are completely through.

3. The spline shaft machining chucking device according to claim 2, characterized by: The support block (22) of the first support module (2) has an upward first protrusion at the top left side, and the periphery of the first protrusion has an acute angled obtuse shape. The support block (22) of the second support module (3) has an upward second protrusion at the top right side, and the periphery of the second protrusion has an acute angled obtuse shape.

4. The spline shaft machining chucking device according to claim 1, characterized by: The top of the sleeve (11) is provided with multiple through holes at equal intervals from left to right. A bolt passes through the through hole. One end of the bolt inside the sleeve (11) is screwed and fixed to the upper arc plate (14). A limit nut is screwed onto one end of the bolt inside the sleeve (11).

5. The spline shaft machining clamping device according to claim 1, characterized in that: The upper arc plate (14) and the lower arc plate (15) are made of 45 steel, and the periphery of the upper arc plate (14) and the lower arc plate (15) has been chamfered.

6. The spline shaft machining clamping device according to claim 1, characterized in that: A pressure sensor is provided on the contact surface between the lower arc plate (15) and the hydraulic cylinder (13).

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