TWM616533U - Roller type protracting mechanism - Google Patents

Abstract

A roller-type indexing mechanism includes a rotating shaft, an indexing structure, a plurality of shaft pins and a plurality of pushing parts. Among them, the indexing structure includes an indexing plate and a plurality of indexing parts respectively connected to the circumference of the indexing plate through a shaft pin, and the pushing parts are respectively arranged between the shaft pin and the indexing part. , The pushing member provides a pushing force to move the indexing member toward the index plate, so as to ensure a good fit between the indexing member and the indexing plate. Of course, when the indexing member and the indexing plate are When a bush is added in between, it ensures a good fit between the indexing piece and the bushing; the rotating shaft is controlled to rotate and drives the indexing plate to achieve a rotation movement by pushing the indexing piece.

Description

Roller indexing mechanism

This creative department is related to the composition of the machining center machine; in particular, it refers to a roller-type indexing mechanism.

It is known that a machining center with a rotary tool magazine is used to drive the tool magazine to rotate. The mechanism includes a rotating shaft and an indexing structure. The rotating shaft is used to drive the indexing structure to rotate. The indexing structure then rotates the turntable connected to it. Many knives are mounted on the turntable. Take the Chinese Mainland Announcement No. CN104493638B, the patent name "A 360-degree indexing device for the arm-type tool magazine" as an example of the invention patent, which discloses that a plurality of spherical indexing are connected to the periphery of the indexing plate of the indexing structure. One side of the indexing plate is provided with a rotating shaft, and the rotating shaft has a spiral groove that can push the spherical indexing part to realize the indexing control tool change program.

However, the bottom of the spherical indexing piece of the above-mentioned patented technology directly contacts the circumferential surface of the indexing plate. When the rotating shaft pushes the spherical indexing piece, the spherical indexing piece can follow the rotation, resulting in the bottom of the spherical indexing piece and the indexing plate. There is friction between the peripheral surfaces of the, and it is easy to cause wear and gaps between each other under long-term action. The existence of gaps will loosen the structure and reduce the service life of the mechanism, and it will generate noise. If you choose to use high rigidity to reduce wear When the index plate is made of material, the overall mechanism load increases and there is a risk of corrosion.

In view of this, the main purpose of this creation is to provide a roller-type indexing mechanism that can ensure the adhesion between the indexing piece and the indexing plate.

In order to achieve the above-mentioned purpose, this creation provides a roller-type indexing mechanism including a rotating shaft, an indexing structure, a plurality of shaft pins and a plurality of pushers. Among them, the peripheral surface of the indexing plate has a plurality of pin holes, and the pin holes are arranged along the radial direction; the indexing structure includes an indexing plate and a plurality of indexing parts arranged on the peripheral surface of the indexing plate, and the indexing part has a shaft Hole; the shaft pin passes through the shaft hole of the indexing piece and is inserted into the pin hole of the indexing plate, the shaft pin restricts the position where the indexing piece is connected to the indexing plate; the pushing force provided by the pushing piece makes the indexing piece face The index plate moves in the direction; the rotating shaft is controlled to rotate and drives the index plate to rotate by pushing the indexing piece.

In addition, the secondary purpose of this creation is to provide a roller-type indexing mechanism that can improve the wear problem between the indexing piece and the indexing plate.

For this reason, the roller-type indexing mechanism in an embodiment includes a plurality of bushings, the bushing has a ball socket and a perforation penetrating the bushing and communicating with the ball socket; wherein the pin hole of the indexing plate includes a large hole section And a small hole section, the hole diameter of the large hole section is larger than that of the small hole section; the bushing is arranged in the large hole section, and the perforation of the bushing communicates with the small hole section; the indexing piece has a spherical body, and the shaft hole penetrates the spherical body, The part spherical body of the indexing piece is located in the ball socket, and the part spherical body protrudes outside the circumferential surface of the index plate; the rotating shaft has a spiral groove, and the outer contour of the spherical body is matched with the groove surface of the spiral groove. The aforementioned bushing is made of polyoxymethylene material.

The effect of this creation is to use the pushing force of the pushing piece to promote the indexing piece to maintain a good fit with the indexing plate or the bushing; secondly, when the mechanism includes a bushing, it can reduce the indexing piece’s Wearability and avoid the index plate from being worn.

[This creation]

100: Drilling and tapping center machine

10: Hinge

12: Spiral groove

20: Indexing structure

21: Index plate

211: Pin Hole

211a: Large hole section

211b: Small hole segment

212: side hole

22: Indexing pieces

221: spherical body

222: Shaft hole

222a: Trail section

222b: Large diameter section

222c: bottom wall

23: Bush

23a: ball socket

23b: Piercing

24: pusher

25: Axle pin

25a: pin body

25b: head

25c: Reduced diameter section

26: positioning parts

30: matrix

40: Support shaft

50: turntable

60: Indexing seat

70: Motor

Fig. 1 is a perspective view of a drilling and tapping center machine including a roller-type indexing mechanism according to a preferred embodiment of the invention.

Fig. 2 is a front view of Fig. 1, in which the indexing seat of the drilling and tapping center machine is omitted.

Figure 3 is similar to Figure 2, omitting most of the components, retaining the shaft and indexing structure.

Fig. 4 is a perspective view of the indexing structure of the roller-type indexing mechanism of the above-mentioned preferred embodiment.

Fig. 5 is a partial cross-sectional view and an enlarged view of some of the components in Fig. 4.

Fig. 6 is a cross-sectional view along the 6-6 direction of Fig. 3;

In order to explain this creation more clearly, a preferred embodiment is given in conjunction with the drawings in detail as follows. Please refer to Figures 1 and 2, the roller-type indexing mechanism of a preferred embodiment of this invention includes a rotating shaft 10 and an indexing structure 20. The rotating shaft 10 is controlled to rotate and drive the indexing structure 20. An index plate 21 rotates. The application of the roller indexing mechanism includes but is not limited to the drilling and tapping center machine 100 disclosed in this embodiment.

The above-mentioned drilling and tapping center machine 100 includes a base body 30, a support shaft 40, a turntable 50, an index base 60 and a motor 70. One end of the support shaft 40 is fixed to the base 30, and the turntable 50 is rotatably sleeved on the support shaft 40 and is located on the side of the base 30; the index seat 60 is fixed to the other end of the support shaft 40, and the motor 70 is connected to the index Seat 60. The rotating shaft 10 of this embodiment passes through the index seat 60 and is driven by the motor 70 to rotate; the index plate 21 of the index structure 20 is sleeved with a support shaft 40 and fixedly connected to the turntable 50.

As shown in FIG. 3, the rotating shaft 10 of this embodiment has a spiral groove 12, and the indexing structure 20 includes a plurality of indexing members 22 arranged on the circumferential surface of the indexing plate 21, wherein the rotating shaft The groove surface of the spiral groove 12 of 10 is matched with the outer contour of the indexing member 22, whereby when the rotating shaft 10 is rotated by the motor 70, the indexing member 22 is pushed through the spiral groove 12 to drive the indexing plate 21 Together with the turntable 50, it rotates to achieve the purpose of indexing control.

The manner in which the indexing member 22 is connected to the circumferential surface of the indexing plate 21 will be described below. Please refer to Figures 4 to 6, the indexing plate 21 of this embodiment is generally a disc body and the peripheral surface has a plurality of mounting parts for combining the indexing member 22, and the mounting parts are arranged along the radial direction. The pin hole 211 consists of a large hole section 211a and a small hole section 211b. The diameter of the large hole section 211a is larger than that of the small hole section 211b; one side of the index plate 21 is distributed with a large number of A side hole 212 taking a screw hole as an example, each side hole 212 communicates with a small hole section 211 b of a pin hole 211. In addition, the indexing member 22 is made of stainless steel and has a spherical body 221 and a shaft hole 222 penetrating through the spherical body 221. The outer contour of the spherical body 221 matches the groove surface of the spiral groove 12, and the shaft hole 222 includes a small-diameter section 222a and a large-diameter section 222b in this embodiment, the diameter of the former is smaller than the latter, and the shaft hole 222 forms a bottom wall 222c where the small-diameter section 222a connects with the large-diameter section 222b.

The indexing structure 20 of this embodiment further includes a plurality of bushes 23, a plurality of pushing members 24, a plurality of shaft pins 25 and a plurality of positioning members 26. The bushing 23 is made of polyoxymethylene (POM) material with high rigidity and low friction characteristics. Each bushing 23 has a ball socket 23a and a perforation 23b. The perforation 23b penetrates the bushing 23 and communicates with each other. Ball socket 23a. When assembling, the bushing 23 is first placed in the large hole section 211a of the pin hole 211 of the index plate 21, and the perforation 23b of the bushing 23 communicates with the corresponding small hole section 211b, and then the indexing piece 22 is placed on the corresponding liner In the ball socket 23a of the sleeve 23, the curvature of the curved surface of the ball socket 23a exactly matches the outer contour of the indexing member 22.

The pushing member 24 of the indexing structure 20 is a component that is deformed under pressure and can return to its original shape when the external force is removed and generates a pushing force. In this embodiment, the pushing member 24 is a hollow shape with a middle part Wave spring as an example but not limited to this, its It is equivalent to a compression spring, and each pushing member 24 is placed in a large-diameter section 222b of the shaft hole 222 of the indexing member 22.

The shaft pin 25 of the indexing structure 20 includes a pin body 25a and a head 25b. The head 25b is connected to one end of the pin body 25a and has a diameter larger than that of the pin body 25a. The pin body 25a has a reduced diameter section 25c. The section 25c is designed in a conical shape and has a diameter smaller than that of other parts of the pin body 25a. When assembling, the pin body 25a passes through the hollow part of the pusher 24, the shaft hole 222 of the indexing member 22, and the perforation 23b of the bushing 23 in sequence, and then is inserted into the small hole of the pin hole 211 of the indexing plate 21 In section 211b, the positioning member 26, which takes the set screw as an example, is then locked into the side hole 212 of the index plate 21. The positioning member 26 is slightly leaning to the side of the shaft pin 25, and it advances as the positioning member 26 is locked in. , A part of the positioning member 26 contacts the tapered diameter-reduced section 25c of the shaft pin 25, and can push the shaft pin 25 down to move toward the index plate 21, so as to help the shaft pin 25 to be firmly and unseparably coupled to the index plate 21, And the head 25b of the shaft pin 25 is located in the large-diameter section 222b of the shaft hole 222 of the indexing member 22. So far, the shaft pin 25 restricts the indexing member 22 to be connected to the indexing plate 21 in a rotatable manner, and the indexing The part-spherical body 221 of the member 22 is located in the ball socket 23 a of the corresponding bush 23, and the part-spherical body 221 protrudes outside the circumferential surface of the index plate 21.

The above-mentioned pushing member 24 is confined between the head 25b of the shaft pin 25 and the indexing member 22, that is, the different ends of the pushing member 24 having a high point and a bottom point are respectively pressed against the bottom surface of the head 25b and the indexing member 22. The bottom wall 222c of the shaft hole 222 of the indexing member 22 is based on the relationship of the shaft pin 25 fixed to the indexing plate 21, so that the pushing force of the pushing member 24 pushes the indexing member 22 to move toward the indexing plate 21 to promote the indexing plate 21. The indexing piece 22 can have a good fit with the ball socket 23a of the bushing 23. Since the bushing 23 is located between the indexing piece 22 and the indexing plate 21 and has good wear resistance, the known indexing piece and the indexing disc are improved. The index plate is in direct contact with easy to wear and the lack of clearance caused by wear; secondly, when the bush 23 is made of wear-resistant material, the index plate 21 can be made of lightweight aluminum alloy, which can reduce the weight and Cost; Furthermore, the pushing force of the pushing member 24 promotes the indexing member 22 to maintain the movement toward the indexing plate 21, which has the effect of automatically adjusting the gap.

In the above, a part of the indexing member 22 is located in the ball socket 23a of the bushing 23, but on the basis of not affecting the existing setting function of the pushing member 24, the bushing 23 can be omitted and replaced by The circumferential surface of the index plate 21 is directly recessed and formed with a ball socket and a pin hole. The pin hole is arranged along the radial direction and one end is connected to the bottom of the ball socket. If so, one end of the shaft pin 25 can still be inserted into the pin hole. 22 can still be stably located in the ball socket. It should also be noted that the aforementioned indexing element is not limited to the spherical contour, and it may be selected to use the indexing element of other contours according to the needs, and the fixing method of the shaft pin 25 is not limited to the use of the above-mentioned stop screw, which can be The thread is provided on the shaft pin, and the index plate is provided with a screw hole matched with it, or the bolt can be inserted through the shaft pin, both of which can achieve the purpose of fixing.

The above descriptions are only the preferred and feasible embodiments of this creation. Any equivalent changes made in the application of this creation specification and the scope of patent application should be included in the patent scope of this creation.

21: Index plate

211: Pin Hole

212: side hole

22: Indexing pieces

221: spherical body

222: Shaft hole

23: Bush

23a: ball socket

23b: Piercing

24: pusher

25: Axle pin

25a: pin body

25b: head

25c: Reduced diameter section

26: positioning parts

Claims (9)

A roller-type indexing mechanism includes a rotating shaft and an indexing structure. The indexing structure includes an indexing plate and a plurality of indexing parts arranged on the circumference of the indexing plate. The rotating shaft is controlled to rotate and pass through the The indexing piece drives the indexing plate to rotate: it is characterized by: The circumferential surface of the index plate has a plurality of pin holes, and the pin holes are respectively arranged along the radial direction; The indexing parts each have a shaft hole; Most of the shaft pins respectively pass through the shaft holes of the corresponding indexing parts and are inserted into the corresponding pin holes of the indexing plate. The shaft pins limit the positions of the indexing parts so that the indexing parts are connected to the indexing parts. On the disk Most pushing elements are used to provide pushing force so that the corresponding indexing elements move toward the index plate. The roller-type indexing mechanism of claim 1, wherein each shaft pin includes a pin body and a head, the pin body passes through the shaft hole of the indexing piece and is inserted into the pin hole of the index plate, and the head is connected At one end of the pin body and the diameter is larger than the diameter of the pin body; each pusher has two different ends, one end of which is against the head of the shaft pin, and the other end is against the indexing element. The roller indexing mechanism of claim 2, wherein the shaft hole of each indexing member includes a small diameter section and a large diameter section, the pin body of the shaft pin passes through the small diameter section, and the head is located In the large-diameter section, the pushing member passes through the pin body, one end of the pushing member abuts against the bottom surface of the head, and the other end abuts against the bottom wall of the large-diameter section of the indexing member. The roller-type indexing mechanism according to any one of claims 1 to 3, comprising a plurality of bushes, each of the bushes has a ball socket and a perforated bushing and communicates with the ball socket; wherein the indexing The pin hole of the disk includes a large hole section and a small hole section. The hole diameter of the large hole section is larger than that of the small hole section; Respectively communicate with corresponding small hole segments; the rotating shaft has a spiral groove; the indexing members have a spherical body, the shaft hole penetrates the spherical body, and the partial spherical body of each indexing member is located in the corresponding ball socket, A part of the spherical body protrudes outside the circumferential surface of the index plate, and the outer contour of the spherical body is matched with the groove surface of the spiral groove of the rotating shaft. The roller-type indexing mechanism according to claim 4, wherein the bushes are made of polyoxymethylene material. The roller-type indexing mechanism according to any one of claims 1 to 3, wherein the rotating shaft has a spiral groove; the circumference of the index plate has a plurality of ball sockets, and the ball sockets are The circumferential surface is concavely formed, and each ball socket communicates with a corresponding pin hole; the indexing elements have a spherical body, the shaft hole penetrates the spherical body, and the partial spherical body of each indexing element is located in the corresponding ball socket Wherein, a part of the spherical body protrudes outside the circumferential surface of the index plate, and the outer contour of the spherical body is matched with the groove surface of the spiral groove of the rotating shaft. The roller-type indexing mechanism according to any one of claims 1 to 3, including a plurality of positioning members; wherein the disk surface of the indexing plate has a plurality of side holes, and the side holes are respectively connected with a pin hole; The positioning member penetrates through the corresponding side hole and contacts the shaft pin so that the shaft pin is not separated from the index plate. The roller-type indexing mechanism of claim 7, wherein each shaft pin has a reduced diameter section, the diameter of the reduced diameter section is smaller than the diameter of other parts of the shaft pin, and each positioning member is located on the side deviated from the shaft pin , And a part of the positioning member is located in the reduced diameter section. The roller-type indexing mechanism according to any one of claims 1 to 3, wherein the pushing members are wave springs.

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