TW202200306A - Rotating mechanism for driving parts of machine tool to rotate including a base, a rotating shaft, a driving mechanism, and a link mechanism - Google Patents

Abstract

A rotating mechanism for driving parts of a machine tool to rotate includes a base, a rotating shaft, a driving mechanism, and a link mechanism. The rotating shaft passes through the base and can be rotated in place. One end of the rotating shaft is used to connect a component. The driving mechanism includes a push-pull rod that can withstand the force to move forward and backward. The push-pull rod drives the rotating shaft to rotate by the link mechanism. Accordingly, the rotation angle of the rotating shaft can be precisely controlled.

Description

Swivel mechanism for rotating parts of machine tools

The present invention is related to processing machine tools; in particular, it refers to a slewing mechanism used to drive parts of the machine tool to rotate.

In the field of machine tools, it is often necessary to control and rotate certain components, such as a tool change arm of an automatic tool change mechanism or a change disk. A known mechanism for performing the aforementioned actions is a slewing mechanism including a rotating shaft, a gear and a rack, and the slewing mechanism drives the gear engaged with it to rotate forward and reverse by driving the rack to reciprocate. When a part of the rotating shaft is rotated, the component combined with one end of the rotating shaft can be driven to rotate correspondingly.

It is true that the above-mentioned slewing mechanism changes the linear motion into a rotating mode, so as to achieve the purpose of controlling the rotation of the components, but the backlash problem in the meshing relationship between the gear and the rack affects the positioning accuracy when the components stop after rotating; Furthermore, the above-mentioned rotary mechanism must be provided with cylinder structures at both ends of the rack, which not only increases costs, but also takes up space.

In view of this, an object of the present invention is to provide a slewing mechanism for driving a component of a machine tool to rotate, which can improve the positioning accuracy effect when the driven component stops after rotating.

In order to achieve the above object, the present invention provides a slewing mechanism for driving a part of a machine tool to rotate, comprising a base, a rotating shaft, a link mechanism and a drive mechanism. The rotating shaft passes through the base and can be rotated in place, and the opposite ends of the rotating shaft respectively form the force receiving end and the output end, wherein the output end is used to connect a component and drive the component to rotate; It is composed of rod connection, one end of a connecting rod is pivotally connected with the base to form a first fixed rotation fulcrum, and one end of a connecting rod is connected with the force end of the rotating shaft to form a second fixed rotation fulcrum. There is at least one pivot point between the first fixed rotation fulcrum and the second fixed rotation fulcrum; the driving mechanism includes a push-pull rod that can bear the force to move forward and backward, and one end of the push-pull rod is pivotally connected to one of the links of the link mechanism. rod, and drives the rotating shaft to rotate when moving back and forth.

The effect of the present invention is that the link mechanism is used to drive the rotating shaft to rotate in a labor-saving manner, and the rotation angle of the rotating shaft can be precisely controlled.

In order to explain the present invention more clearly, a preferred embodiment is given and described in detail as follows in conjunction with the drawings. Referring to FIGS. 1 to 4 , a rotary mechanism 100 according to a preferred embodiment of the present invention is used to drive components of the machine tool to rotate. Not limited to this. The slewing mechanism 100 of this embodiment includes a base 10 , a bearing seat 24 , a rotating shaft 26 , at least one bearing 28 , a stopper 30 , a locking nut 32 , a joint seat 38 , a link mechanism 44 , and a driving mechanism 50 . These are explained one by one as follows.

The base 10 includes a solid rigid member 12 , a coupling block 14 , a first adjustment piece 16 and a second adjustment piece 18 . The rigid member 12 has a circular opening 12a, a plurality of through holes 12b, and a plurality of screw holes 12c distributed around the circular opening 12a; The rigid member 12 is fastened to the position adjacent to the circular opening 12a, and the coupling block 14 further has two screw holes 14a; the first adjustment member 16 and the second adjustment member 18 are screw rods and are respectively locked into the corresponding In the screw hole 14a, one end of the first adjusting member 16 and the second adjusting member 18 on one side of the combining block 14 respectively forms a first blocking surface 16a and a second blocking surface 18a, and one end on the other side of the combining block 14 forms a first blocking surface 16a and a second blocking surface 18a respectively. A nut 22 is locked again, and the nut 22 abuts against the coupling block 14 so that the first adjusting member 16 and the second adjusting member 18 cannot be loosened relative to the coupling block 14 .

The bearing seat 24 has a shaft hole 24 a and a plurality of through holes 24 b distributed around the shaft hole 24 a . A plurality of bolts 20 pass through the through holes 24b and then lock into the corresponding screw holes 12c, so that the bearing seat 24 is fixed on the rigid member 12 .

The rotating shaft 26 is a round rod body and passes through the base 10 in a way that it can rotate in place. In this embodiment, the rotating shaft 26 has a large diameter portion 26a, a threaded segment 26b, a first key groove 26c and a second key groove 26d. The outer diameter of the large diameter portion 26a is larger than the outer diameter of other parts of the rotating shaft 26, and the first key groove 26c and the second key groove 26d are respectively located on both sides of the threaded section 26b. 5 and 6 again, the rotating shaft 26 passes through the shaft hole 24a of the bearing seat 24, and the at least one bearing 28 is two in number and sleeved on the rotating shaft 26 and located in the shaft hole 24a. The stopper 30 has a circular through hole 30a for the rotating shaft 26 to pass through, and the locking nut 32 is then locked to the threaded section 26b of the rotating shaft 26 and abuts against the stopper 30. So far, the bearing 28 The block 30 is limited between the large-diameter portion 26a of the rotating shaft 26 and the locking nut 32, so that the rotating shaft 26 can rotate through the base 10 in place, and the rotation after assembly is completed. The opposite ends of the shaft 26 respectively form a force receiving end 26A and a force output end 26B.

4, 6 and 7, the inner wall of the through hole 30a of the block 30 has a key groove 30b, and the block 30 has a plurality of screw holes 30c communicated with the through hole 30a. When the stopper 30 is sleeved on the rotating shaft 26 , the key 34 is placed between the first keyway 26c of the rotating shaft 26 and the keyway 30b of the stopper 30 , so that the stopper 30 can follow the rotating shaft 26 The way of rotation is coupled to the rotating shaft 26 . In addition, a plurality of stop screws 36 are locked into the screw holes 30c, and one end of some stop screws 36 abuts on the key 34, and one end of some stop screws 36 abuts on the rotating shaft 26, and the stop set is adjusted appropriately. The locking depth of the screw 36 can eliminate the gap existing between the mating components, so as to improve the stability of the block 30 after the combination with the rotating shaft 26 . In addition, the peripheral surface of the stopper 30 has a first abutting surface 30A and a second abutting surface 30B which are spaced apart.

4, 6 and 8, the combination base 38 includes a base portion 38a and a protruding portion 38b connected to each other, and a through hole 38c penetrates the base portion 38a and the protruding portion 38b. The coupling seat 38 is provided with a key groove 38d on the inner wall of the through hole 38c, and a screw hole 38e is drilled on the protruding portion 38b to communicate with the key groove 38d. When the coupling seat 38 is sleeved on the rotating shaft 26, the key 34 is similarly placed between the second key groove 26d of the rotary shaft 26 and the key groove 38d of the coupling seat 38, and then the set screw 36 is locked into the screw hole 38e The centering is tightly pressed, so that the coupling seat 38 is coupled to the output end 26B of the rotary shaft 26 in a manner that can rotate with the rotary shaft 26 .

In order to prevent the coupling seat 38 from loosening from the rotating shaft 26, the rotating shaft 26 of the present embodiment is provided with a screw hole 26e along the central axis. The bolt 40 passes through the blocking piece 42 and is locked into the screw hole 26e, and the bolt 40 penetrates through the screw hole 26e. The aforementioned purpose can be achieved by pushing the blocking piece 42 against the coupling seat 38 . Please refer to FIG. 2 again, the combination seat 38 of the present embodiment extends into the recess 201 of the specific part 200 of the machine tool with its protruding part 38b, and then passes through the chassis part 38a through many bolts (not shown in the figure). The purpose of fixing with the component 200 is completed after the through hole 38f on the upper part is locked into the screw hole 202 of the component 200 . In addition, a side plane 38g is cut on the side of the protruding portion 38b of the joint seat 38, and the component 200 is further provided with two side screw holes 203, which are locked into the screw holes 203 by a set screw 204 and one end abuts the side plane 38g, in order to moderately adjust the locking depth of the two set screws 204, that is, the component 200 can be stably positioned.

Referring to FIGS. 1 and 5 , the link mechanism 44 includes a first link 441 , a second link 442 and a third link 443 , wherein the first link 441 is slightly arcuate and one end passes through a shaft 46 . Then, it is pivotally connected with the rigid member 12 of the base 10, the shaft 46 constitutes the first fixed rotation fulcrum defined in the present invention, the other end of the first link 441 is pivotally connected to one end of the second link 442, and the second link The other end of the rod 442 is pivotally connected to one end of the third link 443, and the other end of the third link 443 is fixedly connected to the force end 26A of the rotating shaft 26. So far, the rotating shaft 26 constitutes the definition of the present invention. The second fixed pivot point. As can be seen from the foregoing, the link mechanism 44 has several pivot points between the first fixed rotational fulcrum and the second fixed rotational fulcrum. In order to ensure that the link mechanism 44 can smoothly drive the rotating shaft 26 to rotate, the aforementioned third link 443 is provided with a sleeve hole 443a at one end. For example, the connecting piece passes through the third connecting rod 443 and is locked into a screw hole (not shown) on the rotating shaft 26 , so that the rotating shaft 26 is evenly stressed.

The driving mechanism is used to move the link mechanism, thereby driving the rotating shaft to rotate. In the present embodiment, the driving mechanism 50 includes a saddle 52, a cylinder 54 and a push-pull rod 56, wherein the saddle 52 is a rigid member 12 pivotally pivoted to the base 10 through a shaft 58; the The cylinder block 54 and the push-pull rod 56 are components of a pressure cylinder. The aforementioned pressure cylinder can be a hydraulic cylinder or a pneumatic cylinder, wherein the cylinder block 54 is fixed on one side of the saddle 52, and one end of the push-pull rod 56 passes through the saddle 52. A pin 60 is passed through and pivotally connected to the arched middle portion of the first link 441 of the link mechanism 44. The other end of the push-pull rod 56 extends into the cylinder 54 and is provided with a head 56a. The head 56a As a pushing part that is subjected to the force formed by the oil pressure or the air pressure, the push-pull rod 56 moves back and forth.

The above is the description of the composition and relative positions of the components of the rotary mechanism 100 according to the preferred embodiment of the present invention. Next, it is explained that it can drive the part 200 of the machine tool to rotate as follows: FIG. 5 shows that the push-pull rod 56 is pushed out, and the first link 441 , the second link 442 and the third link 443 of the link mechanism 44 are roughly The first abutting surface 30A of the block 30 abuts against the first blocking surface 16a of the first adjusting member 16 (see FIG. 7 ), and at the same time, the component 200 coupled to the combination seat 38 is in a first state; then, as shown in FIG. 9 , when the push-pull rod 56 is subjected to the force generated by the oil pressure or the air pressure and retracts into the cylinder block 54 , the first link 441 and the second link 442 and the third connecting rod 443 are interlocked with each other and drive the rotation shaft 26 to rotate, and also drive the rotation angle of the component 200 until the second contact surface 30B of the block 30 abuts against the second stop surface of the second adjustment member 18 18a (refer to FIG. 10 ) and the rotating shaft 26 stops rotating, the component 200 at this time is defined in a second state. The composition of the aforementioned components can precisely control the rotation angle of the rotating shaft 26 . Therefore, when the component is a tool changing arm, the aforementioned first state and second state can represent the switching of tool changing positions.

In the above, since the cylinder 54 is connected to the swingable saddle 52 , when the push-pull rod 56 moves back and forth, the saddle 52 will swing moderately so that the push-pull rod 56 can be pushed and pulled smoothly. Linkage mechanism 44 . However, it should be noted that under the premise of not interfering with the push-pull action, the saddle can be designed in a way that does not swing. In addition, the first adjusting member 16 and the second adjusting member 18 locked in the screw hole 14a can be adjusted to move against or move away from the block 30, so as to change the abutting position of the block 30, thereby achieving the change The purpose of the rotation angle of the rotating shaft 26.

The driving mechanism in the above-mentioned embodiment is mainly a cylinder as an example. However, in other embodiments, the driving mechanism may include a saddle 62 , a cam 64 , a motor 66 and a push-pull rod 68 as shown in FIG. 11 , wherein the saddle 62 The base 10 is also pivoted in a swingable manner. The cam 64 has a cam profile, and the aforementioned cam profile is composed of a guide groove 64a and a cam profile 64b; the motor 66 drives the cam 64 to rotate, and one end of the push-pull rod 68 passes through The saddle 62 is pivotally connected to the first link 441 , the other end of the push-pull rod 68 is combined with the guide block 70 , and the guide block 70 is provided with a guide wheel 72 corresponding to the guide groove 64 a , and the guide wheel 74 and the cam outline 64 b Accordingly, when the motor 66 drives the cam 64 to rotate, the cam 64 guides the push-pull rod 68 to move back and forth with its cam profile, and further controls the rotation of the rotating shaft 26 .

The above descriptions are only preferred feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

[this invention] 100: Rotary mechanism 10: Pedestal 12: Rigid components 12a: circular opening 12b: perforation 12c: screw hole 14: Combine Blocks 14a: screw hole 16: The first adjustment piece 16a: first block 18: Second adjustment piece 18a: second block 20: Bolts 22: Nut 24: Bearing seat 24a: Shaft hole 24b: perforation 26: Rotary axis 26A: Force end 26B: Output end 26a: Large diameter part 26b: Threaded segment 26c: First keyway 26d: Second keyway 26e: screw hole 28: Bearings 30: Stop 30A: The first contact surface 30B: Second contact surface 30a: perforation 30b: Keyway 30c: screw hole 32: Lock Nut 34: key 36: Stop screw 38: Combination seat 38a: Chassis Department 38b: Protrusion 38c: Through hole 38d: keyway 38e: screw hole 38f: perforated 38g: side plane 40: Bolts 42: Baffle 44: Linkage mechanism 441: First Link 442: Second Link 443: Third Link 443a: Holes 46: Shaft 48: Bolts 50: Drive mechanism 52: Saddle 54: Cylinder block 56: Push-pull rod 56a: head 58: Shaft 60: pin 62: Saddle 64: Cam 64a: Guide groove 64b: Cam profile 66: Motor 68: Push-pull rod 70: Guide block 72: Guide wheel 74: Guide wheel 200: Parts 201: Dimples 202: screw hole 203: screw hole 204: stop screw

FIG. 1 is a perspective view of a rotary mechanism for driving a part of a machine tool to rotate according to a preferred embodiment of the present invention; FIG. 2 is a perspective view of the rotary mechanism shown in FIG. 1 from another perspective; Figure 3 is an exploded view of the slewing mechanism shown in Figure 2; FIG. 4 is an exploded view of part of the components of the slewing mechanism shown in FIG. 3; Fig. 5 is the front view of the rotary mechanism shown in Fig. 1; FIG. 6 is a sectional view in the direction 6-6 of FIG. 5; FIG. 7 is a sectional view in the direction 7-7 of FIG. 6; FIG. 8 is a sectional view in the direction 8-8 of FIG. 6; 9 and 10 are front views of the slewing mechanism, revealing the action of the link mechanism in the slewing mechanism; and FIG. 11 is a front view of the rotary mechanism for driving the components of the machine tool to rotate according to another preferred embodiment of the present invention.

100: Rotary mechanism

12: Rigid components

14: Combine Blocks

16: The first adjustment piece

18: Second adjustment piece

20: Bolts

44: Linkage mechanism

443a: Holes

46: Shaft

48: Bolts

50: Drive mechanism

52: Saddle

56: Push-pull rod

58: Shaft

60: pin

Claims (10)

A slewing mechanism for driving parts of a machine tool to rotate, comprising: a base; A rotating shaft passes through the base and can be rotated in place, and opposite ends of the rotating shaft respectively form a force receiving end and a force output end, wherein the output end is used to connect a component and drive the component to rotate; A connecting rod mechanism is composed of a plurality of connecting rods, wherein one end of a connecting rod is pivotally connected with the base to form a first fixed rotating fulcrum, and one end of a connecting rod is connected with the force end of the rotating shaft to form a a second fixed rotational fulcrum, the link mechanism has at least one pivot point between the first fixed rotational fulcrum and the second fixed rotational fulcrum; and A driving mechanism includes a push-pull rod capable of bearing a force to move back and forth. One end of the push-pull rod is pivotally connected to one of the links of the link mechanism, and drives the rotation shaft to rotate when moving back and forth. The slewing mechanism for driving components of a machine tool to rotate as claimed in claim 1, wherein the link systems of the link mechanism include a first link, a second link and a third link, the first link One end of a connecting rod passes through a shaft and is pivotally connected to the base, and the shaft constitutes the first fixed rotation fulcrum. Two ends of the second connecting rod are respectively pivoted to the first connecting rod and the third connecting rod. One end of the third connecting rod is fixedly connected to the force end of the rotating shaft, so that the rotating shaft constitutes the second fixed rotating fulcrum. The slewing mechanism for driving components of a machine tool to rotate as claimed in claim 2, wherein the driving mechanism comprises a saddle and a cylinder, the saddle is pivotably pivoted to the base, and the cylinder is coupled to the base A saddle, one end of the push-pull rod passes through the saddle and is pivotally connected to the first link, and the other end extends into the cylinder body and is subjected to the force to make the push-pull rod move back and forth. The slewing mechanism for driving parts of a machine tool to rotate as claimed in claim 2, wherein the driving mechanism comprises a saddle, a cam and a motor, the saddle can be pivotally pivoted to the base, and the cam has a A cam profile, the motor drives the cam to rotate; one end of the push-pull rod passes through the saddle and is pivotally connected to the first link, and the other end is corresponding to the cam profile, and the rotating cam guides the push-pull rod with the cam profile to generate Move back and forth. The slewing mechanism for driving a part of a machine tool to rotate according to claim 2, wherein one end of the third link has a set of holes, the force end of the rotating shaft passes through the set of holes, and the third link is provided with a set of holes. It is fixedly connected with the rotating shaft through at least one connecting piece. The slewing mechanism for driving a part of a power tool to rotate according to any one of claims 1 to 5, comprising a stopper, the stopper being coupled to the rotating shaft in a manner that can rotate with the rotating shaft, the stopper has a first abutting surface and a second abutting surface; the base has a first blocking surface and a second blocking surface, wherein when the first abutting surface of the block contacts the first blocking surface, or the When the second abutting surface of the block contacts the second blocking surface, the rotating shaft can no longer rotate. The swivel mechanism for driving parts of a machine tool to rotate as claimed in claim 6, wherein the base includes a first adjustment member and a second adjustment member, and the first adjustment member and the second adjustment member are capable of being relative to the The stopper is adjusted and displaced by moving toward or away from the block, the first adjusting member has the first blocking surface, and the second adjusting member has the second blocking surface. The slewing mechanism for driving the components of the machine tool to rotate according to claim 6, comprising a bearing seat, at least one bearing and a locking nut, wherein the bearing seat is combined with the base and has a shaft hole, the rotating shaft Passing through the shaft hole, the at least one bearing is sleeved on the rotating shaft and located in the shaft hole; the rotating shaft has a large diameter portion and a threaded section, and the outer diameter of the large diameter portion is larger than other parts of the rotating shaft The block has a through hole, the rotating shaft passes through the through hole, the lock nut is locked on the threaded section, and the at least one bearing and the block are limited to the large diameter portion and the locking between the nuts. The swivel mechanism for driving a part of a machine tool to rotate according to any one of claims 1 to 5, comprising a coupling seat, the coupling seat is coupled to the output end of the rotary shaft in a manner that can rotate with the rotary shaft , the combination seat connects the component. The slewing mechanism for driving a part of a machine tool to rotate as claimed in claim 9, wherein the combination seat includes a chassis portion and a protruding portion connected to each other, and a through hole penetrates the chassis portion and the protruding portion, the The rotating shaft passes through the through hole; the combination seat is fixed to the part with the chassis part, the protruding part extends into the part, and the protruding part has a side plane, and the part penetrates through it through two set screws And one end of the two set screws abuts against the side plane and is positioned.

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