Automatic driving device for gear shaft workpiece

Abstract

The present invention discloses an automatic gear shaft workpiece driving device, belonging to the technical field of shaft grinding processing, comprising: a center center positioning device, a driving device, and a cam driving device. The driving device is rotatably connected to the center center positioning device. The cam driving device comprises a cam flange, an intermediate flange, a pin, a driving plate, a composite bearing, and a rotating shaft. The intermediate flange is connected to the driving device, the cam flange is mounted on the intermediate flange, the composite bearing is mounted on the inner wall of the intermediate flange, the rotating shaft is mounted in the composite bearing, the driving plate is mounted on the rotating shaft, and multiple pins are mounted on the driving plate. The cam flange is provided with multiple cam lift arc surfaces, the number of pins and cam lift arc surfaces being the same, and the center center positioning device locates the center hole of the gear shaft workpiece. The rotation of the intermediate flange relative to the rotating shaft of the present invention can cause the cam lift arc surface to contact the pin to realize workpiece driving. The present invention is simple and convenient, and the operation is quick, thereby improving work efficiency and processing accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of shaft grinding, and in particular relates to an automatic driving device for a gear shaft workpiece. Background Art

[0002] When grinding shaft parts, a clamping method of a lever and a heart-shaped chuck is generally used for driving. The heart-shaped chuck is first put on the shaft workpiece, and then the set screw is rotated to press the heart-shaped chuck against the outer cylindrical surface of the workpiece end. Finally, the lever is used to push the heart-shaped chuck to drive the workpiece to rotate. The disadvantage of this clamping method is that the shaft section where the heart-shaped chuck is installed cannot be ground. If the shaft section needs to be ground, the workpiece must be turned around, which results in a secondary clamping. For rotating parts, the coaxiality error caused by the secondary clamping is not applicable when the coaxiality requirements are very high. In addition, this method of clamping that relies on manual labor is time-consuming and difficult to meet the needs of automated processing.

[0003] For gear shaft workpieces among shaft parts, CN203679947U discloses a driving device that installs a driving ring on the gear segment and then drives it through a pin shaft. This is similar to the clamping method of a lever plus a heart-shaped chuck, and its shortcomings are also similar, making it difficult to meet the needs of automated processing.

[0004] CN114800084A discloses a precision machining method for an eccentric shaft, specifically a gear shaft. The proposed method improves the machining accuracy of the eccentric shaft segment by grinding the shaft neck. For such an eccentric shaft, machining errors in the gear shaft segment can cause dynamic imbalance during rotation, impacting the dynamic performance of the machine it is assembled in. This necessitates grinding the gear shaft segment's tooth tops.

[0005] In order to adapt to the current development of machining automation, it is necessary to develop an automatic workpiece driving device for gear shaft workpieces, which can not only grind other shaft segments excluding the gear shaft segment, but also grind the entire shaft segment including the gear shaft segment after certain adjustments when necessary. Summary of the Invention

[0006] In view of this, the present invention provides a gear shaft workpiece automatic driving device for solving the above problems.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A gear shaft workpiece automatic driving device comprises: a center top positioning device, a driving device and a cam driving device, the driving device is rotatably connected to the center top positioning device, the cam driving device comprises a cam flange, an intermediate flange, a pin shaft, a driving plate, a composite bearing and a rotating shaft, the right side of the intermediate flange is fixedly connected to the driving device, the cam flange is fixedly installed on the left side of the intermediate flange, the outer ring of the composite bearing is fixedly installed on the inner wall of the intermediate flange, the rotating shaft is fixedly installed in the inner ring of the composite bearing, the driving plate is fixedly installed on the left side of the rotating shaft, a plurality of the pin shafts are circumferentially and vertically distributed on the left side of the driving plate, a plurality of cam lift arc surfaces are provided on the cam flange, the number of the pin shafts is consistent with the number of the cam lift arc surfaces, the center top positioning device passes through the rotating shaft to position the center hole of the shaft end of the gear shaft workpiece.

[0009] Furthermore, the center center positioning device includes a fixed center, a sleeve and a base. The sleeve is fixedly installed in the base. A tapered hole is provided in the sleeve. The tapered surface of the tapered hole positions and fixes the fixed center. The fixed center passes through the rotating shaft to position the center hole of the shaft end to be processed.

[0010] Furthermore, the driving device includes a pulley, a centripetal thrust ball bearing and a rear end flange, the inner ring of the centripetal thrust ball bearing is fixedly mounted on the step shaft neck of the base, the pulley is fixedly mounted on the outer ring of the centripetal thrust ball bearing, the rear end flange is fixedly mounted on one side of the pulley, the rear end flange is fixedly connected to the middle flange, and the right side of the rear end flange is against the outer ring of the centripetal thrust ball bearing.

[0011] Furthermore, the driving device further includes an adjusting spacer, the centripetal thrust ball bearings are provided as a pair, and the adjusting spacer is provided between the inner ring and the outer ring of the pair of centripetal thrust ball bearings.

[0012] Furthermore, the driving device also includes a sealing ring, which is installed between the pulley and the base and is located on the right side of the centripetal thrust ball bearing.

[0013] Furthermore, the driving device also includes a retaining spring and an adjusting gasket. A groove is provided on the stepped shaft neck of the base. The retaining spring is installed in the groove. The adjusting gasket is installed between the retaining spring and the centripetal thrust ball bearing.

[0014] Furthermore, the cam driving device also includes an inner nut and a spacer, and the inner nut and the spacer are installed on the step hole of the intermediate flange to fix the composite bearing.

[0015] Furthermore, the cam driving device also includes an outer sealing ring, which is installed between the driving plate and the intermediate flange.

[0016] Furthermore, the cam driving device also includes an inner sealing ring, and the inner sealing ring is arranged between the rotating shaft and the fixed top.

[0017] The beneficial effects of the present invention are:

[0018] The present invention arranges a composite bearing between the rotating shaft and the intermediate flange. The rotation between the two enables the cam lift arc surface arranged on the cam flange fixedly connected to the intermediate flange to come into contact with and disengage from the pin shaft by relying on the action force of the cam curve, thereby realizing the driving and disengagement of the gear shaft workpiece; a fixed top point is used to hold the workpiece, and since the fixed top point does not rotate, the gear shaft workpiece has a fixed rotation center line during processing, thereby obtaining higher processing accuracy; by changing the outer diameter of the pin shaft and the overhanging length of the cam flange, the tooth top circle of the gear shaft section of the gear shaft workpiece can be ground; the present invention has a simple structure, is quick and convenient to operate, and improves the working efficiency and processing accuracy of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 It is a front view of the workpiece driving device of the present invention;

[0021] Figure 2 This is a left side view of the workpiece driving device of the present invention in a released state;

[0022] Figure 3 This is a left side view of the workpiece driving device of the present invention in a driving state;

[0023] Figure 4 This is a front view of the tooth addendum circle of the grinding gear shaft workpiece of the workpiece driving device of the present invention.

[0024] Among them, in the figure:

[0025] 1-gear shaft workpiece, 2-cam flange, 3-pin, 4-driving plate, 5-inner nut, 6-spacer, 7-middle flange, 8-outer sealing ring, 9-outer nut, 10-inner sealing ring, 11-composite bearing, 12-rotating shaft, 13-rear end flange, 14-pulley, 15-centrifugal thrust ball bearing, 16-sealing ring, 17-fixed top, 18-sleeve, 19-base, 20-circlip, 21-adjusting gasket, 22-adjusting spacer, 23-center hole. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] Refer to the attached Figure 1-3 As shown, the present invention provides a gear shaft workpiece automatic driving device, including: a center top positioning device, a driving device and a cam driving device.

[0029] The center center positioning device includes a fixed center 17, a sleeve 18 and a base 19. The sleeve 18 is fixedly installed in the hole set in the base 19; a tapered hole is provided at the front end of the sleeve 18, and the center 17 is positioned and fixed in the tapered hole through the tapered surface, and the coaxiality of the center 17 and the sleeve 18 is ensured.

[0030] The driving device includes a pulley 14, a pair of centripetal thrust ball bearings 15, a rear end flange 13, a retaining ring 20, an adjustment gasket 21, an adjustment spacer 22 and a sealing ring 16. After the pulley 14 is provided with a bearing hole, it is supported on a stepped shaft neck provided on the base 19 through a pair of centripetal thrust ball bearings 15; the inner ring and outer ring of the pair of centripetal thrust ball bearings 15 are provided with an adjustment spacer 22; one end of the pulley 14 is positioned and connected to the rear end flange 13 by a screw relying on the built-in bearing hole to ensure that the rear end flange 13 is The center line and the center line of the pulley 14 are kept coincident, and the outer rings of the paired centripetal thrust ball bearings 15 are compressed; the outer end of the stepped shaft neck of the base 19 is provided with a groove, and a retaining spring 20 is installed in the groove. Under the action of the step shaft neck shoulder limit, the paired centripetal thrust ball bearings 15 are axially positioned by adjusting the gasket 21; a sealing ring 16 is provided on the right side of the pulley 14 relative to the installation position of the centripetal thrust ball bearing 15 to prevent dust and impurities such as grinding fluid from entering the centripetal thrust ball bearing 15, thereby ensuring the service life of the bearing.

[0031] The cam driving device includes a cam flange 2, an intermediate flange 7, a pin 3, a driving plate 4, an inner nut 5, a spacer 6, an outer sealing ring 8, an outer nut 9, an inner sealing ring 10, a composite bearing 11, and a rotating shaft 12. The right end face of the cam flange 2 is provided with a shaft shoulder, which is positioned and connected to the left end of the intermediate flange 7 by screws; the right end face of the intermediate flange 7 is provided with a shaft shoulder, which is positioned and connected to the left end of the rear end flange 13 by screws; a step hole is provided in the intermediate flange 7, and a composite bearing 11 is provided at the right end of the step hole. The composite bearing 11 can withstand radial force and axial force. The left end of the composite bearing 11 is positioned and fixed in the step hole of the intermediate flange 7 by the inner nut 5 and the spacer 6; the inner ring of the composite bearing 11 is positioned and installed with the rotating shaft 12, and the outer nut 9 is provided on the rotating shaft 12 to limit the axial position of the composite bearing, and the rotating shaft 12 can rotate relative to the intermediate flange 7; the left end of the rotating shaft 12 is positioned and installed with the driving disk 4, and multiple pins 3 are installed vertically on the outer circular end surface of the driving disk 4; an outer sealing ring 8 is provided between the driving disk 4 and the intermediate flange 7; an inner sealing ring 10 is provided between the rotating shaft 12 and the top 17; the number of pins 3 is more than 2.

[0032] like Figure 2 As shown, the inner hole of the cam flange 2 is equipped with camming arcs equal in number to the number of pins 3. After the gear shaft workpiece 1 is hoisted between the headstock and tailstock, the center hole 23 provided at the shaft end and the tailstock tip are used to achieve centering of the gear shaft workpiece 1. The pins 3 are inserted into the tooth grooves of the gear shaft workpiece 1 according to the required number of teeth. Figure 2 The gear end of the gear shaft workpiece 1 extends into the inner hole of the cam flange 2. At this time, the pin 3 and the cam lift arc surface of the cam flange 2 do not contact.

[0033] After processing begins, Figure 3 As shown, the pulley 14 starts to rotate, driving the cam flange 2 to rotate through the rear end flange 13 and the middle flange 7 in sequence; since the gear shaft workpiece 1 does not rotate, it passes through the driving disc 4, the rotating shaft 12 and the composite bearing 11 in sequence through the pin 3 to realize that the gap between the cam lift arc surface of the cam flange 2 and the pin 3 will become smaller and smaller, and eventually the cam lift arc surface will come into contact with the pin 3 to apply a force to the pin 3, and the driving disc 4 will drive the gear shaft workpiece 1 to rotate together. After grinding is completed, the pulley 14 stops rotating. Since the composite bearing 11 is installed inside the middle flange 7, the workpiece can rotate independently in the clamped state, so that the workpiece can be rotated in the stopped state for easy removal.

[0034] Example 2

[0035] like Figure 4As shown, a certain gap is set between the left end face of the cam flange 2 and the right end face of the gear shaft workpiece 1, and the outer diameter of the protruding shaft section of the pin shaft 3 is reduced so that the protruding shaft section of the pin shaft 3 can be embedded in the tooth top circle of the gear tooth groove of the gear shaft workpiece 1. In this way, a grinding wheel tool can be used to grind the tooth top circle surface of the gear of the gear shaft workpiece 1, so as to improve the processing accuracy of the entire gear shaft workpiece 1.

[0036] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0037] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gear shaft workpiece automatic driving device, characterized in that: include: A center top positioning device, a driving device and a cam driving device, the driving device is rotatably connected to the center top positioning device, the cam driving device includes a cam flange, an intermediate flange, a pin shaft, a driving plate, a composite bearing and a rotating shaft, the right side of the intermediate flange is fixedly connected to the driving device, the cam flange is fixedly installed on the left side of the intermediate flange, the outer ring of the composite bearing is fixedly installed on the inner wall of the intermediate flange, the rotating shaft is fixedly installed in the inner ring of the composite bearing, the driving plate is fixedly installed on the left side of the rotating shaft, a plurality of the pin shafts are circumferentially and vertically distributed on the left side of the driving plate, a plurality of cam lift arc surfaces are provided on the cam flange, the number of the pin shafts is consistent with the number of the cam lift arc surfaces, the center top positioning device passes through the rotating shaft to position the center hole of the shaft end of the gear shaft workpiece.

2. The gear shaft workpiece automatic driving device according to claim 1, characterized in that: The center center positioning device includes a fixed center, a sleeve and a base. The sleeve is fixedly installed in the base. A tapered hole is provided in the sleeve. The tapered surface of the tapered hole positions and fixes the fixed center. The fixed center passes through the rotating shaft to position the center hole of the shaft end to be processed.

3. The automatic gear shaft workpiece driving device according to claim 2, characterized in that: The driving device includes a pulley, a centripetal thrust ball bearing and a rear end flange. The inner ring of the centripetal thrust ball bearing is fixedly mounted on the stepped shaft neck of the base. The pulley is fixedly mounted on the outer ring of the centripetal thrust ball bearing. The rear end flange is fixedly mounted on one side of the pulley. The rear end flange is fixedly connected to the middle flange. The right side of the rear end flange abuts against the outer ring of the centripetal thrust ball bearing.

4. The automatic gear shaft workpiece driving device according to claim 3, characterized in that: The driving device further includes an adjusting spacer, the centripetal thrust ball bearings are provided as a pair, and the adjusting spacer is provided between the inner ring and the outer ring of the pair of centripetal thrust ball bearings.

5. The automatic gear shaft workpiece driving device according to claim 3, characterized in that: The driving device further comprises a sealing ring, which is installed between the pulley and the base and is located on the right side of the centripetal thrust ball bearing.

6. The automatic gear shaft workpiece driving device according to claim 3, characterized in that: The driving device further comprises a retaining spring and an adjusting washer. A groove is provided on the stepped shaft neck of the base. The retaining spring is installed in the groove. The adjusting washer is installed between the retaining spring and the centripetal thrust ball bearing.

7. The gear shaft workpiece automatic driving device according to claim 1, characterized in that: The cam driving device further comprises an inner nut and a spacer, wherein the inner nut and the spacer are mounted on the stepped hole of the intermediate flange and are used for fixing the composite bearing.

8. The automatic gear shaft workpiece driving device according to claim 1, characterized in that: The cam driving device further comprises an outer sealing ring, which is installed between the driving plate and the intermediate flange.

9. The automatic gear shaft workpiece driving device according to claim 2, characterized in that: The cam driving device further includes an inner sealing ring, which is arranged between the rotating shaft and the fixed top.

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