CN112207587A

CN112207587A - Connecting device for cam positioning

Info

Publication number: CN112207587A
Application number: CN202011138167.6A
Authority: CN
Inventors: 孙元坤; 曹磊; 李晓; 李姚; 吴炜
Original assignee: Shanghai Tobacco Machinery Co Ltd
Current assignee: Shanghai Tobacco Machinery Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-01-12

Abstract

The invention relates to a connecting device for positioning a cam, which is used for connecting the cam and a zero point positioning disc, and comprises a connecting disc, a middle shaft pin and a positioning pin, wherein the front surface of the connecting disc is provided with a central through hole, a positioning pin hole, a plurality of first thread through holes and a plurality of second thread through holes; the first threaded through holes are arranged in an annular array around the central through hole, are aligned with the positioning through holes in the zero positioning disc and are connected by bolts; the second threaded hole is used for installing a clamp for fixing the cam on the connecting disc.

Description

Connecting device for cam positioning

Technical Field

The invention relates to the field of cam processing and positioning, in particular to a connecting device for cam positioning.

Background

Under the hot tide of intelligent manufacturing, the zero point positioning device occupies an important position, even more and more people think that the zero point positioning device is the basis of intelligent manufacturing, and in the machining process, the zero point positioning system has many advantages in the aspects of standardization of clamping, centralized process and complex machining, so that the repeated clamping frequency of part machining and the machine tool calibration time can be greatly reduced, and the production efficiency is improved.

In the production and processing, cam parts are often encountered, the processing procedure of the cam parts is often complex, the processing is difficult to complete in one-step procedure, the processing requirement is met by frequently clamping and calibrating, the zero positioning device can just overcome the defect, the production and processing efficiency of the cam can be greatly improved, but the zero positioning disc has certain requirements on the size of a blank, and like the irregular parts of the cam, the zero positioning disc is inconvenient to position and clamp, and the zero positioning disc is difficult to directly mount on the zero positioning disc for processing.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a connecting device for cam positioning, which can connect a cam and a zero point positioning plate, and has the advantages of simple structure, reliable connection, and convenient processing, positioning and installation of the cam.

In order to achieve the above object, the present invention provides a connecting device for cam positioning, for connecting a cam and a zero point positioning plate, the end face of the cam is provided with a cam central hole and a cam positioning hole, the zero positioning disc is provided with positioning through holes which are arranged in an annular array, the connecting device comprises a connecting disc, a middle shaft pin and a positioning pin, wherein the front surface of the connecting disc is provided with a central through hole, a positioning pin hole, a plurality of first threaded through holes and a plurality of second threaded through holes, when the cam is arranged on the front surface of the connecting disc, the central hole of the cam is aligned with the central through hole, and the positioning hole of the cam is aligned with the positioning pin hole, the middle shaft pin penetrates through the central through hole and the cam central hole and is in clearance fit with the central through hole and the cam central hole, the positioning pin penetrates through the cam positioning hole and the positioning pin hole and is in clearance fit with the cam positioning hole and the positioning pin hole; the first threaded through holes are arranged in an annular array around the central through hole, are aligned with the positioning through holes in the zero positioning disc and are connected by bolts; the second threaded hole is used for installing a clamp for fixing the cam on the connecting disc.

Furthermore, the connecting disc is provided with a plurality of positioning pin holes which are all positioned on a straight line passing through the center of the central through hole.

Furthermore, a counter bore is further formed in the front face of the connecting disc, the central through hole is formed in the counter bore, and the radius of the counter bore is larger than that of the central hole of the cam.

Further, the radius of the central through hole of the connecting disc is smaller than or equal to the radius of the central hole of the cam.

Further, the radius of the positioning pin hole is the same as that of the cam positioning hole.

Furthermore, the number of the positioning through holes on the zero point positioning disc is 8, and the number of the first threaded through holes is 4.

Furthermore, the front face of the connecting disc is provided with a first reference square, each edge of the first reference square is uniformly provided with a plurality of second threaded through holes, and the number of the second threaded through holes on each edge is the same.

Furthermore, the front face of the connecting disc is also provided with a second reference square, the second reference square is positioned outside the first reference square, each edge of the first reference square is uniformly provided with a plurality of second threaded through holes, and the number of the second threaded through holes on each edge is the same.

Further, 16 and 24 second threaded through holes are respectively arranged on the first reference square and the second reference square.

Further, the first threaded through hole radius is greater than the first threaded through hole radius.

As described above, the connecting device according to the present invention has the following advantageous effects:

through setting up the connection pad, the intermediate shaft axle, and the locating pin, and set up the center perforation on the connection pad, the locating pin hole, first screw thread through-hole and a plurality of second screw thread through-hole, during the use, the cam is installed in the connection pad front, utilize cam centre bore and center perforation alignment cooperation, and cam locating hole and locating pin hole alignment cooperation, rethread center pin axle and locating pin, confirm the processing zero point and the phase place of cam, the second screw hole is used for anchor clamps such as mounting plate will be fixed the cam on the connection pad, realize pressing from both sides tightly, fix a position through first screw thread through-hole and locating through-hole alignment cooperation between connection pad and the positioning plate of zero point, and utilize bolted connection, with this with cam and positioning plate of zero point couple together, and realize the relative positioning between cam and the positioning plate of zero. The connecting device disclosed by the invention is simple in structure and reliable in connection, and is convenient for positioning and mounting the cam on the zero point positioning disc, so that the cam can be subjected to multi-process machining on the zero point positioning disc, the repeated clamping frequency in the traditional multi-process machining of the cam is reduced, and the clamping and calibration efficiency of cam machining is improved.

Drawings

Fig. 1 is a schematic structural view of the front surface of the land of the present invention.

FIG. 2 is a schematic diagram of the structure of the back side of the connecting disc in the invention.

Fig. 3 is a schematic structural view of a side surface of a land in the present invention, which is a partial sectional view.

Fig. 4 is a schematic structural view of a positioning shaft pin of the present invention.

Fig. 5 is a schematic structural view of the center pin of the present invention.

Fig. 6 is a structural schematic diagram of the cam.

Fig. 7 is a schematic structural view of the zero point positioning plate.

Description of the element reference numerals

1 connecting disc

11 center hole

12 positioning pin hole

13 second threaded through hole

14 first threaded through hole

15 counter bore

16 first reference square

17 second reference square

2 locating pin

3 center axle pin

4 cam

41 cam center hole

42 cam locating hole

Zero-5 positioning disk

51 positioning through hole

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

The invention provides a connecting device for cam positioning, which is used for connecting a cam 4 and a zero point positioning disc 5, and referring to fig. 6 and 7, a cam central hole 41 and a cam positioning hole 42 are arranged on the end surface of the cam 4, and positioning through holes 51 arranged in a shape array are arranged on the zero point positioning disc 5. Referring to fig. 1 to 5, the connecting device of the present invention includes a connecting disc 1, a middle shaft pin 3, and a positioning pin 2, wherein a center through hole 11, a positioning pin hole 12, a plurality of first threaded through holes 14, and a plurality of second threaded through holes 13 are formed in the front surface of the connecting disc 1, a cam center hole 41 is aligned with the center through hole 11 and a cam positioning hole 42 is aligned with the positioning pin hole 12 when a cam 4 is placed on the front surface of the connecting disc 1, the middle shaft pin 3 is inserted into the center through hole 11 and the cam center hole 41 and is in clearance fit with both the center through hole 11 and the cam center hole 41, and the positioning pin 2 is inserted into the cam positioning hole 42 and the positioning pin hole 12 and is in clearance fit with both; the first threaded through holes 14 are arranged in an annular array around the central through hole 11, and the first threaded through holes 14 are aligned with the positioning through holes 51 on the zero point positioning disk 5 and connected by bolts; the second threaded hole is used for mounting a clamp for fixing the cam 4 on the connecting disc 1.

The basic working principle of the connecting device of the invention is as follows: the cam 4 is arranged on the front surface of the connecting disc 1, the processing zero point and the phase of the cam 4 are determined by aligning and matching the cam center hole 41 with the center through hole 11 and aligning and matching the cam positioning hole 42 with the positioning pin hole 12, and the second threaded hole is used for installing clamps such as a pressing plate and the like to fix the cam 4 on the connecting disc 1 so as to realize clamping. The connecting disc 1 and the zero point positioning disc 5 are positioned by matching the first threaded through hole 14 and the positioning through hole 51, and are connected by using a bolt. Thus, the cam 4 and the zero point positioning plate 5 are connected by the connection plate 1, the center shaft pin 3, and the positioning pin 2, and the relative positioning between the cam 4 and the zero point positioning plate 5 is realized by the connection plate 1 as an intermediate structure. And through the relative rotation between the zero point positioning disk 5 and the connecting disk 1, different first threaded through holes 14 are switched to be aligned with the positioning through holes 51, so that the relative position between the cam 4 and the zero point positioning disk 5 can be switched, and the clamping frequency of the cam 4 is reduced. The connecting device disclosed by the invention is simple in structure and reliable in connection, and is convenient for positioning and mounting the cam 4 on the zero point positioning disc 5, so that the cam 4 can be subjected to multi-process machining on the zero point positioning disc 5, the repeated clamping frequency in the traditional multi-process machining of the cam 4 is reduced, and the clamping and calibrating efficiency in the machining of the cam 4 is improved.

Referring to fig. 1 to 7, the connecting device of the present invention will be further described with an embodiment.

In the embodiment, referring to fig. 1, two or more positioning pin holes 12 are formed in the connecting disc 1 and are located on a radial straight line passing through the center of the central through hole 11, so that the connecting disc 1 can be connected with cams 4 of various specifications. The radius of the positioning pin hole 12 is the same as that of the cam positioning hole 42, so that the positioning pin 2 inserted into the positioning pin hole 12 and the cam positioning hole 42 can have the same diameter, and the processing and the positioning are convenient.

In this embodiment, referring to fig. 1, 2 and 3, the radius of the central through hole 11 on the connecting disc 1 is smaller than the radius of the cam central hole 41, and correspondingly, the middle shaft pin 3 is a stepped shaft pin, and passes through from the cam central hole 41 to the central through hole 11 during positioning, and is conveniently taken out when the cam central hole 41 is machined, but the radius of the central through hole 11 may also be equal to the radius of the cam central hole 41. The front surface of the connecting disc 1 is further provided with a counter bore 15, the central through hole 11 is arranged in the counter bore 15, the radius of the counter bore 15 is larger than that of the cam central hole 41, the depth of the counter bore 15 is preferably larger than 1/5 of the thickness of the connecting disc 1, when the cam central hole 41 is ground, the middle shaft pin 3 is taken out, the grinding wheel extends into the cam central hole 41, and the counter bore 15 can prevent the grinding wheel from interfering with the connecting disc 1 and plays a role in avoiding.

In this embodiment, referring to fig. 1, the number of the positioning through holes 51 on the zero point positioning plate 5 is 8, and the number of the first threaded through holes 14 on the connecting plate 1 is 4, so that the connecting plate 1 rotates by 45 ° and by multiples of 45 ° with respect to the zero point positioning plate 5, as a matter of convenience, the relative position of the cam 4 and the positioning plate.

In this embodiment, referring to fig. 1, a first reference square 16 is disposed on the front surface of the connecting disc 1, a plurality of second threaded through holes 13 are uniformly distributed on each side of the first reference square 16, and the number of the second threaded through holes 13 on each side is the same, specifically, 4 on each side in this embodiment, so that the connecting disc can be mounted on different orientations according to actual conditions to facilitate clamping of the cam 4. Further, the front surface of the connecting disc 1 is further provided with a second reference square 17, the second reference square 17 is located outside the first reference square 16, the centers of the second reference square 17 and the first reference square 16 coincide, the sides of the second reference square 17 and the first reference square 16 are parallel to each other, a plurality of second threaded through holes 13 are uniformly distributed on each side of the first reference square 16, the number of the second threaded through holes 13 on each side is the same, specifically, each side is 6 in the embodiment, and therefore the clamp is convenient to mount. The first reference square 16 and the second reference square 17 are respectively positioned at the outer sides of the two positioning pin holes 12, the second threaded through hole 13 on the first reference square 16 is matched with the pin hole at the outer side for use, and the second threaded through hole 13 on the second reference square 17 is matched with the pin hole at the inner side for use. The radii of the second threaded through holes 13 may all be the same, improving versatility,

in the present embodiment, the radius of the first threaded through hole 14 is greater than the radius of the second threaded through hole 13, so that the connection strength between the connection disc 1 and the zero point positioning disc 5 can be greater than the connection strength between the connection disc 1 and the cam 4, and the stability of the installation of the cam 4 is ensured. Meanwhile, since the connection between the connection disc 1 and the zero point positioning disc 5 may use only a part of the first threaded through hole 14, other first threaded through holes 14 not used may also be used for mounting a jig, and may be used for a jig of a different specification from that mounted in the second threaded through hole 13.

By last, the connecting device in this embodiment, its sound construction is reliable, and the location is accurate, and the clamping is convenient, and the location is accurate, conveniently connects positioning disk 5 and cam 4 at zero point, ensures cam 4's location simultaneously for cam 4 can carry out multiple operation processing on positioning disk 5 at zero point, can reduce the time of the repeated clamping and the location between different processes by a wide margin, be convenient for process and installation.

In conclusion, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A connecting device for cam positioning, which is used for connecting a cam (4) and a zero point positioning disc (5), wherein the end face of the cam (4) is provided with a cam central hole (41) and a cam positioning hole (42), the zero point positioning disc (5) is provided with positioning through holes (51) which are arranged in an annular array, and the connecting device is characterized in that: the connecting device comprises a connecting disc (1), a middle shaft pin (3) and a positioning pin (2), wherein a center through hole (11), a positioning pin hole (12), a plurality of first thread through holes (14) and a plurality of second thread through holes (13) are formed in the front surface of the connecting disc (1), a cam center hole (41) is aligned with the center through hole (11) when the cam (4) is placed on the front surface of the connecting disc (1), a cam positioning hole (42) is aligned with the positioning pin hole (12), the middle shaft pin (3) penetrates through the center through hole (11) and the cam center hole (41) and is in clearance fit with the center through hole (11) and the cam center hole (41), and the positioning pin (2) penetrates through the cam positioning hole (42) and the positioning pin hole (12) and is in clearance fit with the cam positioning hole (42) and the positioning pin hole (12); the first threaded through holes (14) are arranged in an annular array around the central through hole (11), and the first threaded through holes (14) are aligned with the positioning through holes (51) on the zero point positioning disc (5) and are connected by bolts; the second threaded hole is used for installing a clamp for fixing the cam (4) on the connecting disc (1).

2. The connection device of claim 1, wherein: the positioning pin holes (12) on the connecting disc (1) are multiple and are all positioned on a straight line passing through the center of the central through hole (11).

3. The connection device of claim 1, wherein: the front surface of the connecting disc (1) is further provided with a counter bore (15), the central through hole (11) is arranged in the counter bore (15), and the radius of the counter bore (15) is larger than that of the cam central hole (41).

4. The connection device of claim 1, wherein: the radius of a central through hole (11) of the connecting disc (1) is smaller than or equal to that of a cam central hole (41).

5. The connection device of claim 1, wherein: the radius of the positioning pin hole (12) is the same as that of the cam positioning hole (42).

6. The connection device of claim 1, wherein: positioning through holes (51) on the zero point positioning disc (5) are 8, and the number of the first threaded through holes (14) is 4.

7. The connection device of claim 1, wherein: the front face of the connecting disc (1) is provided with a first reference square (16), each edge of the first reference square (16) is uniformly provided with a plurality of second threaded through holes (13), and the number of the second threaded through holes (13) on each edge is the same.

8. The connection device of claim 7, wherein: the front face of the connecting disc (1) is further provided with a second reference square (17), the second reference square (17) is located outside the first reference square (16), each edge of the first reference square (16) is evenly provided with a plurality of second threaded through holes (13), and the number of the second threaded through holes (13) on each edge is the same.

9. The connection device of claim 8, wherein: 16 and 24 second threaded through holes (13) are respectively arranged on the first reference square (16) and the second reference square (17).

10. The connection device of claim 1, wherein: the radius of the first threaded through hole (14) is larger than that of the first threaded through hole (14).