Center hole drilling clamp for spline shaft yoke of transmission shaft

Abstract

The utility model belongs to the technical field of automobile transmission shafts, and relates to a center hole drilling clamp for a spline shaft yoke of a transmission shaft, which comprises a lathe chuck, a lathe supporting plate, a first clamping table and a second clamping table, a rotating shaft of the lathe chuck is horizontal, and the lathe supporting plate can slide back and forth towards the lathe chuck along the horizontal direction; the horizontal position and the height of the transmission shaft spline shaft yoke are positioned through the two-claw clamping air cylinder and the auxiliary supporting plate, the lathe supporting plate is horizontally fed towards the lathe chuck to conduct drilling operation, and therefore drilling of the transmission shaft spline shaft yoke can be completed through a common lathe. The precision of single piece machining is improved, and meanwhile the assembling quality and efficiency of an assembly can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile transmission shafts and relates to a center hole drilling fixture for a transmission shaft spline fork. Background Art

[0002] The drive shaft is a component that transmits power between the automobile gearbox and the drive axle. The drive shaft spline fork is a common and important component in the drive shaft structure. The accuracy of the hole position, hole diameter, and hole depth on the drive shaft spline fork directly determines the transmission efficiency and service life of the drive shaft.

[0003] However, when the center hole of the existing transmission shaft spline fork is a large hole, it is necessary to mark and find the center first, and then drill the hole on a bench drill. The center holes at both ends of the transmission shaft spline fork are drilled by hand. Therefore, the machining accuracy of the center hole is poor, the circle runout is out of tolerance during workpiece machining, and the depth of the center hole at the fork end cannot be guaranteed. It is difficult to ensure the center height of the fork end when machining the outer circle, resulting in the ear hole wall thickness cannot be guaranteed when machining the ear hole, which ultimately makes it difficult to ensure the accuracy during the assembly of the transmission shaft spline fork, affecting the transmission efficiency and service life.

[0004] Therefore, a transmission shaft spline fork drilling device with higher precision and more reliability is needed to solve this technical problem. Utility Model Content

[0005] The technical solution adopted by the utility model to solve the technical problem is: a center hole drilling fixture for a transmission shaft spline fork, comprising: a lathe chuck, a lathe support plate, a first clamping platform, and a second clamping platform. The rotating axis of the lathe chuck is horizontal, and the lathe support plate can slide back and forth toward the lathe chuck in a horizontal direction. The first clamping platform and the second clamping platform are respectively detachably connected to the upper surface of the lathe support plate; a two-jaw clamping cylinder that opens and closes in a horizontal direction is provided on the upper portion of the first clamping platform, and the opening and closing direction of the two-jaw clamping cylinder is perpendicular to the rotating axis direction of the lathe chuck; a semi-annular auxiliary support plate with an opening upward is detachably connected to the upper portion of the second clamping platform, the arc radius of the auxiliary support plate matches the outer diameter of the shaft of the spline fork of the transmission shaft to be processed, and the arc center axis of the auxiliary support plate is aligned with the rotating axis of the lathe chuck. The axes overlap; when it is necessary to drill a hole on the transmission shaft spline fork, the transmission shaft spline fork is placed on the first clamping platform and the second clamping platform, the fork end of the transmission shaft spline fork is clamped by the two-jaw clamping cylinder, and the shaft end is placed in the arc-shaped opening of the auxiliary support plate. The height of the first clamping platform and the second clamping platform is adjustable. By adjusting the lifting height of the first clamping platform and the second clamping platform, the transmission shaft spline fork and the lathe chuck are aligned so that the rotating axis of the transmission shaft spline fork is coaxial with the rotating axis of the lathe chuck, and then the transmission shaft spline fork is driven by the lathe support plate to approach the lathe chuck at a uniform speed, and the drill bit mounted on the lathe chuck is used to drill holes, thereby ensuring the accuracy of the hole position, hole diameter and hole depth of the transmission shaft spline fork, and improving the transmission efficiency and service life of the transmission shaft.

[0006] Preferably, the clamping head of the two-jaw clamping cylinder is in the shape of a split circular ring, and the clamping head of the two-jaw clamping cylinder is detachably connected to the two-jaw clamping cylinder, and the center axis of the circular ring of the clamping head of the two-jaw clamping cylinder coincides with the rotating axis of the lathe chuck; the clamping head of the two-jaw clamping cylinder is detachably connected to facilitate replacement of clamping heads of different calibers, so as to be suitable for different models and sizes of transmission shaft spline forks for clamping and drilling operations.

[0007] Preferably, the upper surface of the lathe support plate is provided with a concave groove, the length direction of the groove is opposite to the rotating axis of the lathe chuck, and the first clamping platform and the second clamping platform are detachably connected to the bottom of the groove; the bottom of the groove is finely processed to ensure the installation accuracy and flatness of the first clamping platform and the second clamping platform, and ensure the drilling accuracy of the spline shaft fork of the transmission shaft. At the same time, the sunken groove is conducive to collecting and accommodating the debris generated during drilling and flying around, which is convenient for the collection of metal debris.

[0008] More preferably, a scale is provided on the edge of the sink groove of the lathe support plate along the reciprocating sliding direction; the scale is used for the operator to monitor the depth of the drilling in real time.

[0009] Preferably, a rotary turning device is provided at the bottom of the lathe pallet, and the rotating axis of the rotary turning device is vertical and orthogonal to the rotating axis of the lathe chuck; the rotary turning device is used for drilling the other end by directly turning the lathe pallet 180 degrees without secondary clamping after drilling is completed on one end of the spline fork of the transmission shaft.

[0010] The beneficial effects of the utility model are:

[0011] The utility model uses a two-jaw clamping cylinder and an auxiliary supporting plate to position the horizontal position and height of the transmission shaft spline shaft fork, and performs drilling operations by horizontally feeding the lathe support plate toward the lathe chuck. Therefore, the utility model can complete the drilling processing of the transmission shaft spline shaft fork using an ordinary lathe; not only the precision of single-piece processing is improved, but also the assembly quality and efficiency of the assembly are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a center hole drilling fixture for a transmission shaft spline fork;

[0013] Figure 2 yes Figure 1 AA-direction enlarged schematic diagram;

[0014] Figure 3 yes Figure 1 BB-axis enlarged schematic diagram.

[0015] In the figure, 1. lathe chuck; 2. lathe pallet; 3. first chuck; 4. second chuck; 5. two-jaw clamping cylinder; 6. auxiliary support plate; 7. sink. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the relevant technologies in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] refer to Figures 1 to 3 The utility model provides a center hole drilling fixture for a transmission shaft spline fork, comprising: a lathe chuck 1, a lathe support plate 2, a first clamping platform 3, and a second clamping platform 4. The rotation axis of the lathe chuck 1 is horizontal, and the lathe support plate 2 can slide back and forth toward the lathe chuck 1 in the horizontal direction. The first clamping platform 3 and the second clamping platform 4 are respectively detachably connected to the upper surface of the lathe support plate 2; a two-jaw clamping cylinder 5 that opens and closes in the horizontal direction is provided on the upper part of the first clamping platform 3, and the opening and closing direction of the two-jaw clamping cylinder 5 is perpendicular to the rotation axis direction of the lathe chuck 1; a semi-annular auxiliary support plate 6 with an opening upward is detachably connected to the upper part of the second clamping platform 4, and the arc radius of the auxiliary support plate 6 matches the outer diameter of the shaft of the spline fork of the transmission shaft to be processed, and the arc center axis of the auxiliary support plate 6 coincides with the rotation axis of the lathe chuck 1. When it is necessary to drill a hole in the transmission shaft spline fork, the transmission shaft spline fork is placed on the first clamping platform 3 and the second clamping platform 4, the fork end of the transmission shaft spline fork is clamped by the two-claw clamping cylinder 5, and the shaft end is placed in the arc-shaped opening of the auxiliary support plate 6. The height of the first clamping platform 3 and the second clamping platform 4 is adjustable. The transmission shaft spline fork is aligned with the lathe chuck 1 by adjusting the lifting height of the first clamping platform 3 and the second clamping platform 4, so that the rotating axis of the transmission shaft spline fork is coaxial with the rotating axis of the lathe chuck 1, and then the transmission shaft spline fork is driven by the lathe support plate 2 to approach the lathe chuck 1 at a uniform speed, and drilling is performed by the drill bit clamped on the lathe chuck 1, thereby ensuring the accuracy of the hole position, hole diameter and hole depth of the transmission shaft spline fork, and improving the transmission efficiency and service life of the transmission shaft.

[0018] Furthermore, the clamping head of the two-jaw clamping cylinder 5 is in the shape of a split circular ring, and the clamping head of the two-jaw clamping cylinder 5 can be detachably connected to the two-jaw clamping cylinder 5, and the center axis of the circular ring of the clamping head of the two-jaw clamping cylinder 5 coincides with the rotating axis of the lathe chuck 1; the clamping head of the two-jaw clamping cylinder 5 can be detachably connected to facilitate replacement of clamping heads of different calibers, so as to be suitable for different models and sizes of transmission shaft spline forks for clamping and drilling operations.

[0019] Furthermore, a concave groove 7 is provided on the upper surface of the lathe support plate 2, and the length direction of the groove 7 is opposite to the rotating axis of the lathe chuck 1. The first clamping platform 3 and the second clamping platform 4 are detachably connected to the bottom of the groove 7; the bottom of the groove 7 is finely processed to ensure the installation accuracy and flatness of the first clamping platform 3 and the second clamping platform 4, and to ensure the drilling accuracy of the spline shaft fork of the transmission shaft. At the same time, the sunken groove 7 is conducive to collecting and accommodating the debris generated during drilling and scattering, which is convenient for the collection of metal debris.

[0020] Furthermore, a scale is provided on the edge of the sink groove 7 of the lathe support plate 2 along the reciprocating sliding direction; the scale is used for the operator to monitor the depth of the drilling in real time.

[0021] Furthermore, a rotary turning device is provided at the bottom of the lathe pallet 2, and the rotating axis of the rotary turning device is vertical and orthogonal to the rotating axis of the lathe chuck 1; the rotary turning device is used for drilling the other end by directly turning the lathe pallet 2 180 degrees without secondary clamping after drilling is completed on one end of the spline shaft fork of the transmission shaft.

[0022] Example

[0023] In this embodiment, a synchronous two-claw clamping cylinder 5 is used to clamp the workpiece, and the two-claw clamping cylinder 5 is fixed to the lathe support plate 2 of an ordinary lathe to complete the center hole processing, and a two-claw clamping cylinder 5 suitable for the transmission shaft spline shaft fork of different diameters is made. When drilling the fork end, the fork end of the workpiece is clamped by the two-claw clamping cylinder 5, and the rear part is supported by an auxiliary support plate 6 connected to the cylinder. A special positioning semicircular sleeve is installed in the direction of the fork end, and the semicircular sleeve positions the fork end. The depth of the center hole is controlled by the automatic horizontal feed of the equipment to ensure that the center hole meets the process requirements. When drilling the other end, it is only necessary to turn the lathe support plate 2 180 degrees to make the workpiece turn around, clamp the two-claw clamping cylinder 5, and position the fork end with a positioning column to ensure that the center hole of this end meets the process requirements.

[0024] To summarize, the utility model uses a two-jaw clamping cylinder and an auxiliary support plate to position the horizontal position and height of the transmission shaft spline fork, and performs drilling operations by horizontally feeding the lathe pallet toward the lathe chuck. Therefore, the utility model can complete the drilling processing of the transmission shaft spline fork using an ordinary lathe; it not only improves the accuracy of single-piece processing, but also improves the assembly quality and efficiency of the assembly. Therefore, the utility model has broad application prospects.

[0025] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A center hole drilling fixture for a transmission shaft spline fork, characterized in that: include: A lathe chuck (1), a lathe support plate (2), a first chuck platform (3), and a second chuck platform (4); the rotation axis of the lathe chuck (1) is horizontal; the lathe support plate (2) can slide back and forth toward the lathe chuck (1) in a horizontal direction; and the first chuck platform (3) and the second chuck platform (4) are respectively detachably connected to the upper surface of the lathe support plate (2); A two-jaw clamping cylinder (5) which opens and closes in a horizontal direction is provided on the upper part of the first clamping platform (3), and the opening and closing direction of the two-jaw clamping cylinder (5) is perpendicular to the rotation axis direction of the lathe chuck (1). A semi-annular auxiliary support plate (6) which opens upward is detachably connected to the upper part of the second clamping platform (4), and the arc radius of the auxiliary support plate (6) matches the outer diameter of the spline shaft fork of the transmission shaft to be processed, and the arc center axis of the auxiliary support plate (6) coincides with the rotation axis of the lathe chuck (1).

2. A center hole drilling fixture for a transmission shaft spline fork according to claim 1, characterized in that: The clamping head of the two-jaw clamping cylinder (5) is in the shape of a split circular ring. The clamping head of the two-jaw clamping cylinder (5) is detachably connected to the two-jaw clamping cylinder (5). The center axis of the circular ring of the clamping head of the two-jaw clamping cylinder (5) coincides with the rotation axis of the lathe chuck (1).

3. The center hole drilling fixture for a transmission shaft spline fork according to claim 1, characterized in that: The upper surface of the lathe support plate (2) is provided with a concave groove (7), the length direction of the groove (7) is directly opposite to the rotating axis of the lathe chuck (1), and the first chuck (3) and the second chuck (4) are detachably connected to the bottom of the groove (7).

4. A center hole drilling fixture for a transmission shaft spline fork according to claim 3, characterized in that: The edge of the sink groove (7) of the lathe support plate (2) is provided with a scale along the reciprocating sliding direction.

5. The center hole drilling fixture for a transmission shaft spline fork according to claim 1, characterized in that: A rotary turning device is provided at the bottom of the lathe support plate (2), and the rotary axis of the rotary turning device is vertical and orthogonal to the rotary axis of the lathe chuck (1).

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