CN110280802B - Clamping tool for driving shaft drilling - Google Patents

Clamping tool for driving shaft drilling Download PDF

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Publication number
CN110280802B
CN110280802B CN201910672691.2A CN201910672691A CN110280802B CN 110280802 B CN110280802 B CN 110280802B CN 201910672691 A CN201910672691 A CN 201910672691A CN 110280802 B CN110280802 B CN 110280802B
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CN
China
Prior art keywords
driving shaft
block
support
groove
drilling
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Application number
CN201910672691.2A
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Chinese (zh)
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CN110280802A (en
Inventor
周志彪
应锦辉
陈敬森
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Taizhou Zhongya Automobile Parts Co ltd
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Taizhou Zhongya Automobile Parts Co ltd
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Priority to CN201910672691.2A priority Critical patent/CN110280802B/en
Publication of CN110280802A publication Critical patent/CN110280802A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/061—Work-clamping means adapted for holding a plurality of workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/08—Work-clamping means other than mechanically-actuated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

The invention provides a clamping tool for drilling a driving shaft, and belongs to the technical field of clamps. The problem to be solved by the drilling device is how to improve the drilling precision of the driving shaft. The invention comprises a base plate and a support fixed on the base plate, wherein a positioning hole for a driving shaft to pass through is arranged on the support in a penetrating way, a stop block and a jacking mechanism are also arranged on the base plate, and the stop block and the jacking mechanism are positioned on two sides of the support along the opening direction of the positioning hole. The clamping tool for drilling the driving shaft ensures the accuracy of the drilling position, improves the drilling precision and improves the production efficiency of enterprises.

Description

Clamping tool for driving shaft drilling
Technical Field
The invention belongs to the technical field of clamps, relates to a clamping tool, and particularly relates to a clamping tool for driving shaft drilling.
Background
The drive shaft is an important part for transmitting power in the transmission system of the automobile, and the drive shaft and the gearbox are used for transmitting the power of the engine to wheels together so that the automobile can generate driving force. In the production of a drive shaft, it may be necessary to work around the drive shaft, for example, to work external splines on the drive shaft or to work holes in the end face of the drive shaft, etc., depending on the design requirements. Sometimes, drilling is even needed on one end side of the driving shaft as required, and specific requirements are set on the drilling angle and the drilling position to the end face of the driving shaft, especially on the drilling angle, and the drilling angle is required to have a certain position or angle relation with external splines on the driving shaft.
Currently, there are various clamping tools for machining a driving shaft on the market, such as a vertical machining fixture for a half shaft part disclosed in application number 201720893204.1, a semi-automatic fixture for machining an automobile driving shaft disclosed in application number 201821715500.3, a fixture for producing a driving shaft disclosed in application number 201621001060.6, and a drilling fixture for a driving shaft disclosed in application number 201820914120.6, however, these clamping tools are not suitable for being used when drilling a side portion of one end of a driving shaft. When the side part of one end of the driving shaft is required to be drilled, production personnel simply drill the driving shaft after positioning the driving shaft, however, the drilling angle and the drilling position cannot be accurately controlled due to simple positioning, so that the drilling precision is low and the reject ratio is high.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a clamping tool for drilling a driving shaft, which aims to solve the technical problem of improving the drilling precision of the driving shaft.
The aim of the invention can be achieved by the following technical scheme:
the clamping tool for drilling the driving shaft comprises a base plate and a support fixed on the base plate, wherein a positioning hole for the driving shaft to pass through is formed in the support in a penetrating manner, a stop block and a jacking mechanism are further arranged on the base plate, the stop block and the jacking mechanism are located on two sides of the support along the direction of the positioning hole, and the clamping tool is characterized in that the positioning hole is a spline hole, a tooth missing position is arranged between two spline teeth on the inner side wall of the positioning hole, a cavity communicated with the lower portion of the positioning hole is formed in the support, an elastic positioning assembly is arranged in the cavity, and the elastic positioning assembly partially stretches into the lower portion of the positioning hole under the action of self elastic force.
When the driving shaft is produced, the toothed plate is firstly used for processing the external spline at the middle part of the driving shaft, and the parallel tooth positions on the external spline are ensured. After the external spline is formed, the driving shaft is clamped on the clamping tool, and then the whole clamping tool is installed on processing equipment to drill holes in the driving shaft. During clamping, the driving shaft penetrates through the positioning hole, the driving shaft is in spline fit with the positioning hole through the external spline, and meanwhile the parallel tooth positions on the external spline of the driving shaft are embedded into the tooth missing positions on the positioning hole. The driving shaft is arranged on the support and then positioned between the stop block and the jacking mechanism, and then the jacking mechanism is controlled to work so as to axially position the driving shaft, so that the driving shaft is clamped.
Because the distance from the drilling position of the driving shaft to one end surface of the driving shaft has certain requirements, the drilling position of the driving shaft can be controlled by utilizing the cooperation of the stop block and the jacking mechanism; meanwhile, the drilling position of the driving shaft is required to have a certain angle relation with the external spline, so that the tooth missing position is arranged on the positioning hole, the tooth missing position and the drill bit on the processing equipment are guaranteed to form the same angle as the above, and the drill bit can process the hole with the same angle on the driving shaft after the parallel tooth position and the tooth missing position on the driving shaft are matched. The spline fit has clearance, which generally does not affect the machining accuracy of the product, but the drive shaft has very high requirements for the angle of the bore. Therefore, the elastic positioning assembly is arranged in the support, and the elastic positioning assembly partially stretches into the lower part of the positioning hole under the action of self elastic force, so that when the driving shaft passes through the positioning hole, the elastic positioning assembly can generate an upward acting force on the driving shaft, and the driving shaft is limited to swing due to a clearance of spline fit during drilling by virtue of the acting force, so that the drilling precision is ensured.
In the clamping tool for drilling the driving shaft, the elastic positioning assembly is provided with the flat embedded part, and the embedded part stretches into the positioning hole under the elastic action of the elastic positioning assembly.
The elastic positioning assembly is provided with the flat embedded part, and when the driving shaft is fixed on the support, the embedded part can be embedded between two spline teeth at the lower part of the external spline of the driving shaft, so that the driving shaft can be simultaneously acted upwards and to one side, and the positioning effect on the driving shaft is further improved to ensure the drilling precision.
In the clamping tool for drilling the driving shaft, the two side walls of the embedded part are in arc transition.
The embedded part is to be embedded between two spline teeth of the external spline on the driving shaft, the contact part of the embedded part and the external spline can be smooth by setting the two side walls of the embedded part to be in arc transition, when the driving shaft passes through the positioning hole, the arc transition between the two side walls of the embedded part can be used for guiding, so that the embedded part is smoothly embedded between two spline teeth of the external spline on the driving shaft, and meanwhile, damage to the spline teeth can be avoided.
In the clamping tool for drilling the driving shaft, the elastic positioning assembly comprises a locking block hinged in the cavity and a locking spring arranged in the cavity, the embedded part is arranged on the upper end face of the locking block, and the elastic force of the locking spring acts on the lower end face of the locking block upwards.
The embedded part is arranged on the upper end face of the locking block, the elastic force of the locking spring acts on the lower end face of the locking block upwards, the locking block swings around the hinging point under the elastic force of the locking spring to enable the embedded part to extend into the positioning hole, when the driving shaft is arranged on the support, the driving shaft can extrude the locking block to swing reversely slightly, and then the embedded part can be embedded between two spline teeth on an external spline of the driving shaft under the elastic force of the locking spring to position the driving shaft, so that the defect that a gap exists in positioning through the spline can be overcome, and drilling precision is ensured.
In the clamping tool for drilling the driving shaft, the support comprises a positioning block and a sliding block, the upper end face of the positioning block is provided with a matching groove and the sliding block is slidably connected in the matching groove, the positioning hole is formed in the sliding block, the cavity comprises a groove formed in the bottom wall of the matching groove and a yielding groove formed in the lower end of the sliding block, the lower end of the yielding groove is communicated with the upper end of the groove, the lower portion of the positioning hole is communicated with the upper end of the yielding groove, and the hinge point of the locking block is located in the groove.
During assembly, the positioning block is fixed on the base plate, the locking block is hinged in the groove on the bottom wall of the matching groove, then the sliding block is connected in the matching groove on the positioning block to form a support, and the yielding groove at the lower end of the sliding block is communicated with the groove on the positioning block to form a cavity. After the driving shaft passes through the positioning hole, the embedded part at the upper end of the locking block is embedded between two spline teeth on the driving shaft external spline under the action of the elasticity of the locking spring, so that the gap between the driving shaft external spline and the positioning hole is compensated, and the drilling precision is ensured. In addition, the support adopts the split structure, and the clamping of driving shafts with different sizes can be adapted by replacing the sliding blocks with positioning holes with corresponding sizes, so that the applicability is improved well.
In the clamping tool for drilling the driving shaft, a block-shaped convex part is arranged on one side wall of the upper end of the locking block, gaps are formed between the lower end face of the block-shaped convex part and the bottom wall of the matching groove, and gaps are formed between one side wall of the locking block where the block-shaped convex part is located and the inner side groove wall of the groove, when the embedded part stretches into the positioning hole under the action of the elasticity of the locking spring, the block-shaped convex part abuts against the bottom wall of the matching groove, and the lower end face of the block-shaped convex part intersects with the bottom wall of the matching groove to form an acute angle.
The locking piece swings under the action of the elastic force of the locking spring, and when the locking piece swings excessively, the embedded part is located below the locating hole, so that the elastic locating component cannot act on the driving shaft. Therefore, set up cubic convex part at the upper end side wall of locking piece, all set up the clearance between the lower terminal surface of cubic convex part and the diapire of cooperation groove and locking piece side wall and recess inside wall that cubic convex part is located can provide the swing space for the locking piece, and cooperate then can restrict the swing angle of locking piece through cubic convex part and the diapire of cooperation groove, avoid the excessive swing of locking piece, can push down the locking piece smoothly when the drive shaft passes the locating hole, thereby make the embedding portion on the locking piece can imbed smoothly between two spline teeth of drive shaft external splines, guaranteed the reliability that the elastic positioning subassembly fixed a position the drive shaft.
In the above-mentioned clamping frock that drive shaft drilling was used, as another technical scheme, elastic positioning subassembly is including sliding the locking lever that sets up in the cavity and the supporting spring who overlaps to establish on the locking lever, and embedded part links firmly in the locking lever upper end, and the locking lever has the trend of upwards moving all the time under supporting spring's elasticity effect.
The locking rod moves upwards under the action of the elasticity of the supporting spring to enable the embedded part to extend into the positioning hole, when the driving shaft is installed on the support, the driving shaft can extrude the locking rod to slightly move downwards, and then the embedded part can be embedded between two spline teeth on the external spline of the driving shaft under the elasticity of the supporting spring to position the driving shaft, so that the defect that a gap exists in positioning through the spline can be overcome, and drilling precision is ensured.
In the clamping tool for drilling the driving shaft, the mounting hole is formed in the substrate in a penetrating mode, the connecting seat is fixed in the mounting hole, the jacking mechanism comprises a jacking rod and a jacking cylinder fixed on the lower surface of the substrate and close to the lower hole opening of the mounting hole, the lower end of the jacking rod is hinged to the end portion of a piston rod of the jacking cylinder, a connecting rod is arranged between the connecting seat and the jacking rod, two ends of the connecting rod are hinged to the connecting seat and the middle of the jacking rod respectively, the upper end of the jacking rod penetrates out of the upper port of the mounting hole, and when the end portion of the piston rod of the jacking cylinder is pushed out, the upper end of the jacking rod can be driven to swing towards the direction close to the support.
After the drive shaft is arranged on the support in a penetrating mode, the end portion of a piston rod of the jacking cylinder is controlled to push out, the lower end of the jacking rod swings towards the direction away from the support by taking the hinging point of the connecting rod and the connecting seat as the circle center, so that the upper end of the jacking rod swings towards the direction close to the support, when the upper end of the jacking rod abuts against one end face of the drive shaft, the axial stop block can be pushed to move, positioning of the drive shaft along the axis direction is achieved, the acting force of the elastic locking assembly on the drive shaft is matched, movement of the drive shaft is well prevented, and drilling accuracy is guaranteed.
In the above-mentioned clamping frock that drive shaft drilling was used, as another technical scheme, the roof pressure mechanism includes the promotion cylinder of fixing at the base plate upper surface, promotes the piston rod tip of cylinder towards the support, and the piston rod tip of promotion cylinder has linked firmly the push pedal.
After the driving shaft is arranged on the support in a penetrating way, the end part of the piston rod of the pushing cylinder is controlled to push out together with the push plate, and the push plate can abut against one end surface of the driving shaft to push the driving shaft forwards due to the fact that the end part of the piston rod of the pushing cylinder faces the support, so that the driving shaft is positioned along the axis direction.
In the clamping tool for drilling the driving shaft, the number of the supports is even, each support is two by two in one group, the two sides of each support along the direction of the positioning hole are correspondingly provided with the stop blocks and the jacking mechanisms, supporting blocks are arranged between each support and the corresponding stop blocks, V-shaped positioning grooves are formed in the upper ends of the supporting blocks, two supports in the same group are arranged side by side, a compression cylinder is fixed between the two supports in the same group on the substrate, and the end part of a piston rod of the compression cylinder is fixedly connected with a long-strip-shaped pressing plate.
The arrangement of the even number support makes this clamping frock can once only carry out the clamping to a plurality of drive shafts, just so just can once only drill to a plurality of drive shafts simultaneously after fixing this clamping frock on processing equipment, improved the production efficiency of enterprise well.
Because the drive shaft has certain length, set up the supporting shoe between each support and corresponding dog, utilize the drive shaft to support in leaning on the V type constant head tank on the supporting shoe, and be located fixed compression cylinder between two supports in same group, the piston rod tip of compression cylinder links firmly and is rectangular form clamp plate, after all clamping the drive shaft on two supports in same group, utilize the piston rod of compression cylinder to retract and make the clamp plate press on two drive shafts, can further improve the positioning effect of this clamping frock to the drive shaft in order to guarantee drilling precision like this. And the arrangement of one compression cylinder and one pressing plate can simultaneously position two driving shafts, so that the cost is reduced.
Compared with the prior art, the clamping tool for drilling the driving shaft has the following advantages:
1. the positioning holes with the tooth missing positions are formed in the support, the driving shaft and the support form spline fit, meanwhile, the tooth missing positions on the driving shaft are embedded in the tooth missing positions, accuracy of drilling angles is guaranteed, and accuracy of drilling positions is guaranteed through the fit of the stop blocks and the jacking mechanism;
2. an elastic positioning assembly with an embedded part is arranged in the support, when the driving shaft passes through the positioning hole, the embedded part is embedded between two spline teeth of an external spline on the driving shaft under the action of elastic force, and meanwhile, an upward acting force and a lateral acting force are generated on the driving shaft, so that the gap of spline fit is well eliminated, and the drilling precision is ensured;
3. the support is of a split structure of the sliding block and the positioning block, so that clamping of driving shafts with different sizes can be adapted by replacing the sliding block with the positioning hole with the corresponding size, and applicability is improved well;
4. the even number of support sets up for can once only carry out the clamping to a plurality of drive shafts, and then realize once only drilling a plurality of drive shafts simultaneously, improve the production efficiency of enterprise well.
Drawings
Fig. 1 is a schematic diagram of a clamping tool for drilling a hole in a driving shaft according to the first embodiment.
Fig. 2 is a schematic view of a substrate in the first embodiment.
Fig. 3 is another schematic view of the substrate in the first embodiment.
Fig. 4 is a schematic view of the first embodiment in which the carrier is not connected to the drive shaft.
Fig. 5 is a schematic view of the first embodiment in which the mount is coupled to the drive shaft.
Fig. 6 is an exploded view of the mount in the first embodiment.
Fig. 7 is a schematic view of a drive shaft to be clamped.
In the figure, 1, a substrate; 2. a support; 2a, a cavity; 2b, positioning blocks; 2b1, mating grooves; 2b2, grooves; 2b3, a convex strip; 2c, a sliding block; 2c1, positioning holes; 2c11, missing teeth; 2c2, a yielding groove; 2c3, a chute; 3. a stop block; 4. a jacking mechanism; 4a, jacking a cylinder; 4b, pushing the compression bar; 4c, connecting rods; 5. an elastic positioning assembly; 5a, locking blocks; 5a1, an embedding portion; 5a2, a block-shaped convex portion; 5b, locking springs; 6. a connecting seat; 7. a support block; 8. a compacting cylinder; 9. a pressing plate; 10. a bottom plate; 11. a turntable; 12. a tailstock; 13. a mounting base; 14. a lifting block; 15. a drive shaft; 15a, tooth combining position.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1, the clamping tool for drilling a driving shaft comprises a bottom plate 10 with a rectangular plate, and a turntable 11 and a tailstock 12 which are respectively fixed on the bottom plate 10, wherein the turntable 11 and the tailstock 12 are arranged opposite to each other, the turntable 11 is close to one short side of the bottom plate 10, and the tailstock 12 is close to the other short side of the bottom plate 10. The opposite sides of the turntable 11 and the tailstock 12 are fixedly connected with mounting seats 13 with L-shaped vertical sections, a base plate 1 is fixedly connected between the two mounting seats 13, and the base plate 1 is parallel to the base plate 10.
As shown in fig. 1 and 2, a support 2 is fixed on the upper surface of the substrate 1, a positioning hole 2c1 for passing through a driving shaft 15 is provided on a side portion of the support 2, the positioning hole 2c1 is provided along a length direction of the bottom plate 10, a stop block 3 is further fixed on the upper surface of the substrate 1, a pressing mechanism 4 is provided on the upper surface of the substrate 1, and the stop block 3 and the pressing mechanism 4 are located on two sides of the support 2 along the opening direction of the positioning hole 2c 1. A supporting block 7 is arranged between the support 2 and the stop block 3, and a V-shaped positioning groove is arranged at the upper end of the supporting block 7; a lifting block 14 is arranged between the support 2 and the jacking mechanism 4. Due to the longer length of the driving shaft 15, the two ends of the driving shaft 15 can be supported by the supporting blocks 7 and the heightening blocks 14, so that the levelness of the driving shaft 15 can be ensured.
As shown in fig. 2, in this embodiment, the number of the supports 2 is an even number, and each support 2 is two by two in a group, both sides of each support 2 along the opening direction of the positioning hole 2c1 are correspondingly provided with a stop block 3 and a pressing mechanism 4, two supports 2 in the same group are arranged in parallel, the upper surface of the substrate 1 is fixed with a pressing cylinder 8 between two supports 2 in the same group, and the end part of the piston rod of the pressing cylinder 8 is fixedly connected with a strip-shaped pressing plate 9. The arrangement of the even number of supports 2 enables the clamping tool to clamp the driving shafts 15 at one time, so that the driving shafts 15 can be drilled at one time after the clamping tool is fixed on processing equipment, and the production efficiency of enterprises is improved well.
As shown in fig. 1, 2 and 3, the base plate 1 is provided with a mounting hole in a penetrating manner, the elevating block 14 is located between the support 2 and the mounting hole, and the mounting hole is internally fixed with the connecting seat 6. The jacking mechanism 4 comprises a jacking rod 4b and a jacking cylinder 4a fixed on the lower surface of the base plate 1 and close to the lower orifice of the mounting hole, the lower end of the jacking rod 4b is hinged with the end part of a piston rod of the jacking cylinder 4a, a connecting rod 4c is arranged between the connecting seat 6 and the jacking rod 4b, two ends of the connecting rod 4c are respectively hinged with the connecting seat 6 and the middle part of the jacking rod 4b, the upper end of the jacking rod 4b penetrates out of the upper port of the mounting hole, and when the end part of the piston rod of the jacking cylinder 4a is pushed out, the upper end of the jacking rod 4b can be driven to swing towards the direction close to the support 2.
As shown in fig. 4, 5 and 6, the positioning hole 2c1 is a splined hole, a tooth-missing position 2c11 is arranged between two spline teeth on the inner side wall of the positioning hole 2c1, a cavity 2a communicated with the lower part of the positioning hole 2c1 is arranged in the support 2, an elastic positioning component 5 is arranged in the cavity 2a, a flat embedded part 5a1 is arranged on the elastic positioning component 5, the embedded part 5a1 stretches into the lower part of the positioning hole 2c1 under the self elastic action of the elastic positioning component 5, the height of the spline teeth of the embedded part 5a1 is slightly higher than that of the lower part of the positioning hole 2c1, and arc transition is formed between two side walls of the embedded part 5a 1. Specifically, the elastic positioning assembly 5 includes a locking block 5a hinged in the cavity 2a and a locking spring 5b provided in the cavity 2a, wherein a hinge point of the locking block 5a is eccentrically provided, the embedded portion 5a1 is provided on an upper end surface of the locking block 5a, and an elastic force of the locking spring 5b acts on a lower end surface of the locking block 5a.
As shown in fig. 4, 5 and 6, the support 2 includes a positioning block 2b and a sliding block 2c, the upper end surface of the positioning block 2b is provided with a matching groove 2b1, the positioning hole 2c1 is arranged on the sliding block 2c, the sliding block 2c is slidably connected in the matching groove 2b1, a protruding strip 2b3 is arranged on the inner wall of the matching groove 2b1, a sliding groove 2c3 is arranged on the corresponding side of the sliding block 2c along the vertical direction, and the protruding strip 2b3 is positioned in the sliding groove 2c 3. The cavity 2a comprises a groove 2b2 formed in the bottom wall of the matching groove 2b1 and a yielding groove 2c2 formed in the lower end of the sliding block 2c, the lower end of the yielding groove 2c2 is connected with the upper end of the groove 2b2, the lower portion of the positioning hole 2c1 is communicated with the upper end of the yielding groove 2c2, and the hinge point of the locking block 5a is located in the groove 2b 2. A block-shaped convex part 5a2 is arranged on one side wall of the upper end of the locking block 5a, a gap is arranged between the lower end face of the block-shaped convex part 5a2 and the bottom wall of the matching groove 2b1, a gap is arranged between one side wall of the locking block 5a where the block-shaped convex part 5a2 is positioned and the inner side groove wall of the groove 2b2, when the embedded part 5a1 stretches into the positioning hole 2c1 under the action of the elasticity of the locking spring 5b, the block-shaped convex part 5a2 abuts against the bottom wall of the matching groove 2b1, and the lower end face of the block-shaped convex part 5a2 intersects with the bottom wall of the matching groove 2b1 to form an acute angle.
In the production of the drive shaft 15, the external spline is first machined in the middle of the drive shaft 15 by means of a toothed plate, and the external spline is ensured to have the parallel teeth 15a. After the external spline is formed, the driving shaft 15 is clamped on the clamping tool, the driving shaft 15 to be clamped is shown in fig. 7, and then the whole clamping tool is installed on processing equipment to drill holes on one end side part of the driving shaft 15.
As shown in fig. 6, during clamping, the driving shaft 15 passes through the positioning hole 2c1, the driving shaft 15 is in spline fit with the positioning hole 2c1 through an external spline, and meanwhile, the tooth position 15a on the external spline of the driving shaft 15 is embedded into the tooth missing position 2c11 on the positioning hole 2c 1. The driving shaft 15 is arranged on the support 2 and then is positioned between the stop block 3 and the jacking mechanism 4, then the piston rod of the jacking cylinder 4a is controlled to push out, the upper end of the jacking rod 4b swings towards the direction approaching to the support 2 to push the driving shaft 15 to move forwards until the driving shaft 15 is axially fixed between the stop block 3 and the jacking mechanism 4, and thus the driving shaft 15 is clamped conveniently.
Because the drilling position of the driving shaft 15 is required to have a certain angle relation with the external spline, the positioning hole 2c1 is provided with the tooth missing position 2c11, and the tooth missing position 2c11 and the drill bit on the processing equipment are guaranteed to form the same angle, so that when the parallel tooth position 15a on the driving shaft 15 is matched with the tooth missing position 2c11, the drill bit can process the hole with the same angle on the driving shaft 15.
The spline fit is provided with clearance, which generally does not affect the accuracy of the product, but the drive shaft 15 requires a very high degree of drilling. For this reason, the elastic positioning assembly 5 with the embedded portion 5a1 is disposed in the support 2, and the embedded portion 5a1 extends into the lower portion of the positioning hole 2c1, and since the embedded portion 5a1 is flat, when the driving shaft 15 passes through the positioning hole 2c1, the embedded portion 5a1 is embedded between two spline teeth of the external spline on the driving shaft 15 under the action of elastic force, so that an upward and a lateral force can be simultaneously generated on the driving shaft 15, thereby eliminating the gap of spline fit well, and ensuring the accuracy of drilling.
Example two
The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the elastic positioning component 5 includes a locking rod slidably disposed in the cavity 2a and a supporting spring sleeved on the locking rod, the embedded portion 5a1 is fixedly connected to the upper end of the locking rod, and the locking rod always has a tendency to move upwards under the action of the elastic force of the supporting spring.
Example III
The present embodiment is basically the same in structure and principle as the first embodiment, except that: in this embodiment, the pushing mechanism 4 includes a pushing cylinder fixed on the upper surface of the base plate 1, and a push plate is fixedly connected to the end of the piston rod of the pushing cylinder, so that the driving shaft 15 can be pushed to move toward the stop block 3 when the piston rod of the pushing cylinder is pushed out.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (5)

1. The clamping tool for drilling the driving shaft comprises a base plate (1) and a support (2) fixed on the base plate (1), wherein a positioning hole (2 c 1) used for the driving shaft (15) to pass through is arranged on the support (2), a stop block (3) and a jacking mechanism (4) are arranged on the base plate (1), the stop block (3) and the jacking mechanism (4) are positioned on two sides of the support (2) along the opening direction of the positioning hole (2 c 1), the clamping tool is characterized in that the positioning hole (2 c 1) is a splined hole, the inner side wall of the positioning hole (2 c 1) is provided with a tooth-lacking position (2 c 11) between two splined teeth, a cavity (2 a) communicated with the lower part of the positioning hole (2 c 1) is arranged in the support (2), an elastic positioning component (5) is arranged in the cavity (2 a), the elastic positioning component (5) partially stretches into the lower part of the positioning hole (2 c 1) under the action of self elastic force, a flat embedded part (5 a 1) is arranged on the elastic positioning component (5), the embedded part (5 a) is arranged on the elastic positioning component (5), the elastic positioning component (5 a) is arranged in the locking part (5 a) and is arranged in the cavity (5 a) and is locked in the cavity (5 a) and positioned in the cavity (5 a position, the elastic force of locking spring (5 b) upwards acts on terminal surface under locking piece (5 a), run through on base plate (1) and be provided with the mounting hole, mounting hole internal fixation has connecting seat (6), roof pressure mechanism (4) are including roof pressure pole (4 b) and fix roof pressure cylinder (4 a) of being close to mounting hole lower orifice department at base plate (1) lower surface, roof pressure pole (4 b) lower extreme is articulated mutually with roof pressure cylinder (4 a) piston rod tip, be equipped with connecting rod (4 c) between connecting seat (6) and roof pressure pole (4 b), connecting rod (4 c) both ends are articulated mutually with connecting seat (6) and roof pressure pole (4 b) middle part respectively, roof pressure pole (4 b) upper end wears out the mounting hole top port, can drive roof pressure pole (4 b) upper end to be close to support (2) direction swing when roof pressure cylinder (4 a) piston rod tip release.
2. The clamping tool for drilling a driving shaft according to claim 1, wherein the two side walls of the embedded part (5 a 1) are in arc transition.
3. The clamping tool for drilling the driving shaft according to claim 1, wherein the support (2) comprises a positioning block (2 b) and a sliding block (2 c), a matching groove (2 b 1) is formed in the upper end face of the positioning block (2 b) and the sliding block (2 c) is slidably connected in the matching groove (2 b 1), the positioning hole (2 c 1) is formed in the sliding block (2 c), the cavity (2 a) comprises a groove (2 b 2) formed in the bottom wall of the matching groove (2 b 1) and a yielding groove (2 c 2) formed in the lower end of the sliding block (2 c), the lower end of the yielding groove (2 c 2) is communicated with the upper end of the groove (2 b 2), and the lower portion of the positioning hole (2 c 1) is communicated with the upper end of the yielding groove (2 c 2), and the hinge point of the locking block (5 a) is located in the groove (2 b 2).
4. The clamping tool for drilling the driving shaft according to claim 3, wherein a block-shaped protrusion (5 a 2) is arranged on one side wall of the upper end of the locking block (5 a), gaps are formed between the lower end surface of the block-shaped protrusion (5 a 2) and the bottom wall of the matching groove (2 b 1) and gaps are formed between one side wall of the locking block (5 a) where the block-shaped protrusion (5 a 2) is located and the inner side groove wall of the groove (2 b 2), and when the embedded part (5 a 1) stretches into the positioning hole (2 c 1) under the action of the elastic force of the locking spring (5 b), the block-shaped protrusion (5 a 2) abuts against the bottom wall of the matching groove (2 b 1), and the lower end surface of the block-shaped protrusion (5 a 2) and the bottom wall of the matching groove (2 b 1) intersect at an acute angle.
5. The clamping tool for drilling the driving shaft according to claim 1, wherein the number of the supports (2) is even, each support (2) is two by two in one group, the two sides of each support (2) along the opening direction of the positioning hole (2 c 1) are correspondingly provided with the stop block (3) and the pressing mechanism (4), a supporting block (7) is arranged between each support (2) and the corresponding stop block (3), a V-shaped positioning groove is arranged at the upper end of the supporting block (7), two supports (2) positioned in the same group are arranged in parallel, a pressing cylinder (8) is fixed between the two supports (2) of the same group on the substrate (1), and the end part of a piston rod of the pressing cylinder (8) is fixedly connected with a long-strip pressing plate (9).
CN201910672691.2A 2019-07-24 2019-07-24 Clamping tool for driving shaft drilling Active CN110280802B (en)

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CN110899768B (en) * 2019-12-13 2021-04-27 武船重型工程股份有限公司 Beam drilling device and beam drilling method
CN113146309B (en) * 2021-04-27 2023-03-24 厦门鹭镁铝制品有限公司 A location frock for non ferrous metal calendering piece
CN114393506A (en) * 2022-01-21 2022-04-26 日达智造科技(如皋)有限公司 Grinding female jig, grinding jig assembly and grinding equipment

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