Cutter clamping mechanism of processing machine

Abstract

A cutter clamping mechanism of a processing machine is used for clamping a cutter bar and comprises a base, a control rod and two clamping arms. Wherein the two clamping arms are pivoted with the base and can be relatively clamped or opened, and the control rod penetrates through the base and can move between a first position and a second position along an axis. When the control rod is located at the first position, the two clamping arms can stably clamp the cutter bar; and when the control rod is positioned at the second position, the control rod drives the two clamping arms to pivot and open so as to easily release the cutter bar.

Description

TECHNICAL FIELD

[0001] The present invention relates to a tool holder of a machine tool, and more particularly, to a tool holder of a machine tool. BACKGROUND

[0002] In the process of achieving automatic machining, a machine tool needs a tool changing mechanism and a tool magazine. The tool magazine is configured with a tool holder or a tool clamp capable of storing a tool bar combined with a tool for machining. In order to properly store the tool bar and prevent it from falling due to improper arrangement or during switching position, the tool holder is inserted into a socket hole of the tool bar and is secured by a clamping structure, and the tool clamp uses two clamping arms that can be relatively clamped to hold the tool bar, and the two clamping arms are connected by a spring to prevent them from being easily opened, thereby securing the tool bar.

[0003] Although the tool holder or the tool clamp can secure the tool bar, there is still room for improvement. For example, the two clamping arms are pivoted to a base, and the spring is arranged between the two clamping arms to maintain the clamping tendency of one end of the two clamping arms by the elastic force of the spring. In order to ensure that the two clamping arms can effectively and stably hold the tool bar, the known method is to use a spring with a large elastic coefficient to ensure the clamping force. However, this also makes it difficult to open the two clamping arms, so that a force greater than the elastic force must be applied to open the two clamping arms during placement or use of the tool bar, which easily causes the tool bar to be difficult to enter and exit the clamping space of the two clamping arms, and even causes the tool bar to fall. SUMMARY

[0004] Therefore, the purpose of the present invention is to provide a tool holder of a machine tool that can securely hold the tool bar and achieve the purpose of releasing the tool bar with less effort.

[0005] In order to achieve the above purpose, the present invention provides a tool holder of a machine tool for holding a tool bar, which includes a base, a control rod and two clamping arms. The base has a shaft hole; the control rod passes through the shaft hole and can move along an axis between a first position and a second position, one end of the control rod is provided with a linkage part; the two clamping arms are pivoted to the base and can be relatively clamped or opened, and each of the two clamping arms has a linked part; when the control rod is in the first position, the two clamping arms can hold the tool bar; when the control rod is in the second position, the linkage part of the control rod links the linked parts of the two clamping arms, so that the two clamping arms are pivoted to open and release the tool bar.

[0006] The effect of the present application is that the control lever can be moved between the first position and the second position, and can drive the two clamping arms to open or clamp when moving, so as to achieve the purpose of releasing the tool bar in a labor-saving manner or firmly clamping the tool bar. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 A perspective view of a machining tool clamping mechanism and a tool bar of a preferred embodiment of the present application;

[0008] Figure 2 Another perspective view of Figure 1 ;

[0009] Figure 3 A partial exploded view of the machining tool clamping mechanism of the preferred embodiment of the present application;

[0010] Figure 4 A partial exploded view of the machining tool clamping mechanism shown in Figure 3 ;

[0011] Figure 5 A top view of the machining tool clamping mechanism shown in Figure 3 ;

[0012] Figure 6 A sectional view, showing the machining tool clamping mechanism in a clamped state;

[0013] Figure 7 A partial bottom view of Figure 6 ;

[0014] Figure 8 A simple view for illustrating the angle of the two clamping arms of the machining tool clamping mechanism when in a clamped state;

[0015] Figure 9 A sectional view, showing the machining tool clamping mechanism in an open state;

[0016] Figure 10 A simple view for illustrating the angle of the two clamping arms of the machining tool clamping mechanism when in an open state.

[0017] SYMBOL DESCRIPTION

[0018] 100: tool clamping mechanism

[0019] 10: chain seat

[0020] 11: upright plate

[0021] 11a: through hole

[0022] 11b: upper pivot lug

[0023] 11c: lower pivot ear

[0024] 11d: protruding block

[0025] 12: horizontal plate block

[0026] 12a: alignment hole

[0027] 12b: counterbore hole

[0028] 13: shaft pin

[0029] 14: roller

[0030] 15: positioning pin

[0031] 16: bolt

[0032] 20: base

[0033] 21: upper clamping plate

[0034] 21a: positioning hole

[0035] 21b: first threaded hole

[0036] 21c: upper through hole

[0037] 21d: shaft through hole

[0038] 21e: second threaded hole

[0039] 22: fixed block

[0040] 22a: recess

[0041] 22b: shaft hole

[0042] 22c: side through hole

[0043] 23: lower clamping plate

[0044] 23a: counterbore hole

[0045] 23b: lower through hole

[0046] 23c: shaft through hole

[0047] 24: wear-resistant sleeve

[0048] 25: limiting block

[0049] 25a: middle through hole

[0050] 25b: arc flange

[0051] 26: positioning pin

[0052] 27: positioning pin

[0053] 28: pivot

[0054] 29: bolt

[0055] 30: control lever

[0056] 31: long rod body

[0057] 31a: head

[0058] 31b: threaded hole

[0059] 32: connecting block

[0060] 32a: through hole

[0061] 32b: lateral slot

[0062] 33: roller

[0063] 34: bolt

[0064] 35: pin

[0065] 40: return member

[0066] 50: clamping arm

[0067] 50a: pivot hole

[0068] 52: groove

[0069] 52a: port

[0070] 52b: closed end

[0071] 54: arc-shaped inner edge

[0072] 54a: first positioning block

[0073] 56: arc-shaped inner edge

[0074] 56a: second positioning block

[0075] 200: cutter bar

[0076] 201: alignment slot

[0077] 202: alignment slot

[0078] 203: ring slot

[0079] F: force

[0080] H: fixed distance

[0081] L: axis

[0082] L1: first extension line

[0083] L2: second extension line

[0084] P1: first position

[0085] P2: second position

[0086] W1: first width

[0087] W2: second width

[0088] θ1: first half angle

[0089] θ2: second half angle DETAILED DESCRIPTION

[0090] In order to make the application clearer, a preferred embodiment will be described in detail as follows with reference to the accompanying drawings. Please refer to Figures 1 to 3 As shown in the drawings, the tool clamping mechanism 100 of a processing machine in a preferred embodiment of the present application is used to clamp a tool bar 200, which has two alignment grooves 201 and 202 with different widths on its circumferential surface. The tool clamping mechanism 100 comprises a chain seat 10, a base 20, a control rod 30, a restoring member 40 and two clamping arms 50. The structural features of each component will be described first, and then the assembly and operation of the tool clamping mechanism 100 will be described.

[0091] The chain seat 10 has a main body in L shape formed by a vertical plate 11 and a horizontal plate 12. The vertical plate 11 has a through hole 11a, and a linking part and a linked part on each side. The linking part is formed by a upper pivot lug 11b and a lower pivot lug 11c, and the linked part is a protruding block 11d. When two chain seats 10 are arranged adjacently, the protruding block 11d of one chain seat 10 is located between the upper pivot lug 11b and the lower pivot lug 11c. A shaft pin 13 is sequentially inserted through the upper pivot lug 11b, the protruding block 11d and the lower pivot lug 11c, so that the two adjacent chain seats 10 are pivotally connected to each other. When multiple chain seats 10 are connected to each other, a chain belt (not shown) is formed. In addition, the chain seat 10 is further combined with multiple rollers 14, which can cooperate with a track (not shown) to move along a fixed track. The horizontal plate 12 has two alignment holes 12a and four counterbores 12b.

[0092] The base 20 is detachably combined with the chain seat 10. Please refer to Figure 4 and Figure 5As shown, the base 20 of the present embodiment comprises an upper clamping plate 21, a fixing block 22 and a lower clamping plate 23. The upper clamping plate 21 has two positioning holes 21a, four first screw holes 21b, four upper through holes 21c, two shaft through holes 21d and three second screw holes 21e. The fixing block 22 has two recesses 22a, a shaft hole 22b and two side through holes 22c. The shaft hole 22b is located between the two recesses 22a and internally provided with a wear-resistant sleeve 24. The two side through holes 22c are respectively located outside each recess 22a. The lower clamping plate 23 has three countersunk holes 23a, four lower through holes 23b and two shaft through holes 23c. In addition, the base 20 further comprises a limiting block 25, which has three middle through holes 25a and an arc flange 25b. It should be noted that the number of structural holes possessed by each component is not limited to the described embodiment, and can be increased or decreased according to actual installation requirements.

[0093] The control rod 30 comprises a long rod body 31 and a linkage portion provided at one end of the long rod body 31. Please refer to Figure 4 and Figure 6 As shown, one end of the long rod body 31 has a head portion 31a, and the other end has a screw hole 31b arranged along the axial direction. The long rod body 31 passes through the wear-resistant sleeve 24 arranged in the shaft hole 22b, thereby reducing wear. The linkage portion comprises a connecting block 32 and two rollers 33. The connecting block 32 has a through hole 32a. The connecting block 32 is fixedly connected with the long rod body 31 by a bolt 34 passing through the through hole 32a and being locked in the screw hole 31b. Thus, the control rod 30 can be movably connected with the fixing block 22 along an axis L. In addition, the connecting block 32 further has a lateral groove 32b on each side of the through hole 32a. The two rollers 33 are rotatably arranged in the lateral grooves 32b by a pin 35, and the center distance of the two rollers 33 is a fixed distance H. Figure 8 Please refer to.

[0094] The return member 40 is exemplified by a spring in the present embodiment but is not limited thereto. The return member 40 is pre-installed on the long rod body 31 before the long rod body 31 passes through the shaft hole 22b. After the long rod body 31 is fixedly connected with the connecting block 32, the two ends of the return member 40 abut against the fixing block 22 and the head portion 31a, respectively. The return member 40 provides a pushing force to the control rod 30, so that the control rod 30 is maintained to move outward.

[0095] The two clamping arms 50 are pivotally connected with the base 20 and can be relatively clamped or opened. In the present embodiment, the two clamping arms 50 respectively have a pivot hole 50a, and a linkage portion and a clamping portion are respectively formed on each side of the pivot hole 50a. Figure 6 and Figure 7As shown, the linkage portion of each of the clamping arms 50 is formed by a groove 52 having a port 52a and a closed end 52b; the clamping portions of each of the clamping arms 50 respectively have an arc-shaped inner edge 54 and 56, and the arc-shaped inner edge 54 has a first positioning block 54a, and the arc-shaped inner edge 56 has a second positioning block 56a, wherein the first positioning block 54a has a first width W1, the second positioning block 56a has a second width W2, and the first width W1 is smaller than the second width W2.

[0096] The above is the description of the structure of each component of the tool clamping mechanism 100 of the preferred embodiment of the present application, and the assembly is described below.

[0097] Please refer to Figures 4 to 6 As shown, first, place the fixing block 22, the limiting block 25 and the two clamping arms 50 of the control lever 30 assembled between the upper clamping plate 21 and the lower clamping plate 23, then pass two positioning pins 26 through the corresponding upper through hole 21c, middle through hole 25a and lower through hole 23b, pass two positioning pins 27 through the corresponding upper through hole 21c, recess 22a and lower through hole 23b, pass two pivot shafts 28 through the corresponding shaft through hole 21d, pivot hole 50a and shaft through hole 23c, and then pass three bolts 29 from bottom to top through the corresponding countersunk holes 23a, and one of the bolts 29 is first passed through the middle through hole 25a and then locked into the second screw hole 21e, and the other two bolts 29 are respectively passed through the two side through holes 22c and then locked into the other two second screw holes 21e, thereby fixing the upper clamping plate 21 and the lower clamping plate 23 on both sides of the fixing block 22, and forming a moving space between the upper clamping plate 21 and the lower clamping plate 23. At the same time, the limiting block 25 is fixed between the upper clamping plate 21 and the lower clamping plate 23, and the linkage portion of the control lever 30 and the part of the two clamping arms 50 having the linkage portion are located in the moving space, wherein the two rollers 33 of the linkage portion are respectively located in the grooves 52 of the corresponding clamping arms 50.

[0098] Further as Figure 3 and Figure 5 As shown, make one end of the head portion 31a of the control lever 30 pass through the through hole 11a of the chain seat 10, and at the same time, the horizontal plate 12 of the chain seat 10 abuts against the upper clamping plate 21, then insert the two ends of the two positioning pins 15 into the two alignment holes 12a and the corresponding positioning holes 21a of the upper clamping plate 21 respectively, and then pass four bolts 16 through the corresponding countersunk holes 12b and lock them into the corresponding first screw holes 21b, and the assembly of the tool clamping mechanism 100 is completed, at this time, the head portion and the linkage portion of the control lever 30 are respectively located on both sides of the chain seat 10.

[0099] The tool clamping mechanism 100 is used to clamp or release the tool lever 200 as follows.

[0100] Please cooperate Figure 6 As shown in FIG. 1, the two clamping arms 50 of the tool holder clamping mechanism 100 are in a clamped state, at this moment, the first positioning block 54a of one of the clamping arms 50 is embedded in the positioning groove 201 of the tool bar 200, the second positioning block 56a of the other clamping arm 50 is embedded in the positioning groove 202 of the tool bar 200, and the arc flange 25b of the limiting block 25 is embedded in a ring groove 203 of the tool bar 200, thereby making the tool bar 200 clamped in a predetermined swing direction and unable to rotate arbitrarily. At the same time, the control rod 30 is pushed by the restoring member 40 to maintain outward movement, causing the connecting block 32 to abut against the fixed block 22, and the two rollers 33 are located at the approach port 52a of each groove 52, thereby defining that the control rod 30 is currently at a first position P1, and defining a virtual first extension line L1 and a second extension line L2 passing through the center of each groove 52 and roller 33, respectively, as shown in FIG. 2. Figure 8 As shown in FIG. 2, the first extension line L1 and the second extension line L2 intersect to form an acute angle, and the axis L passes through the intersection point of the first extension line L1 and the second extension line L2. When the control rod 30 is at the first position P1, the axis L divides the acute angle into two first half angles of the same angle. In this embodiment, the first half angle θ1 is 6.5 degrees and satisfies 1 ≦ θ1 ≦ 10. Preferably, the first half angle θ1 is 6.5 degrees.

[0101] Please cooperate Figure 9 As shown in FIG. 1, the two clamping arms 50 of the tool holder clamping mechanism 100 are in a clamped state, at this moment, the first positioning block 54a of one of the clamping arms 50 is embedded in the positioning groove 201 of the tool bar 200, the second positioning block 56a of the other clamping arm 50 is embedded in the positioning groove 202 of the tool bar 200, and the arc flange 25b of the limiting block 25 is embedded in a ring groove 203 of the tool bar 200, thereby making the tool bar 200 clamped in a predetermined swing direction and unable to rotate arbitrarily. At the same time, the control rod 30 is pushed by the restoring member 40 to maintain outward movement, causing the connecting block 32 to abut against the fixed block 22, and the two rollers 33 are located at the approach port 52a of each groove 52, thereby defining that the control rod 30 is currently at a first position P1, and defining a virtual first extension line L1 and a second extension line L2 passing through the center of each groove 52 and roller 33, respectively, as shown in FIG. 2. Figure 10 As shown in FIG. 1, the two clamping arms 50 of the tool holder clamping mechanism 100 are in a clamped state, at this moment, the first positioning block 54a of one of the clamping arms 50 is embedded in the positioning groove 201 of the tool bar 200, the second positioning block 56a of the other clamping arm 50 is embedded in the positioning groove 202 of the tool bar 200, and the arc flange 25b of the limiting block 25 is embedded in a ring groove 203 of the tool bar 200, thereby making the tool bar 200 clamped in a predetermined swing direction and unable to rotate arbitrarily. At the same time, the control rod 30 is pushed by the restoring member 40 to maintain outward movement, causing the connecting block 32 to abut against the fixed block 22, and the two rollers 33 are located at the approach port 52a of each groove 52, thereby defining that the control rod 30 is currently at a first position P1, and defining a virtual first extension line L1 and a second extension line L2 passing through the center of each groove 52 and roller 33, respectively, as shown in FIG. 2.

[0102] As can be seen from the above description, the two clamping arms 50 are indirectly affected by the return member 40 and thus firmly clamp the tool holder 200 with a large clamping force. Regarding the tool release design, this invention utilizes the control lever 30, which can move along the axis L between the first position P1 and the second position P2. Combined with the design that the first half-angle θ1 of the two clamping arms 50 in the clamping state is 6.5 degrees, when the control lever 30 moves from the first position P1 to the second position P2, since the angle θ1 is close to zero degrees, the two clamping arms 50 can be easily pushed to pivot and open the clamping space, achieving the purpose of releasing the tool holder 200 in a force-saving manner. Therefore, the smaller the angle of the first half-angle θ1, the smaller the force F that can push the two clamping arms 50 to generate a pivoting motion. Conversely, when the force F applied to the control lever 30 is released, the return member 40 releases the compressed energy and pushes the control lever 30 back to the first position P1, causing the two clamping arms 50 to return to the clamping state, ready for the next clamping use.

[0103] The first half-angle θ1 disclosed in the above embodiment has an angle range between 1 degree and 10 degrees, and the second half-angle θ2 has an angle range between 11 degrees and 20 degrees. However, it must be noted that as long as the first half-angle θ1 is less than or equal to 45 degrees, the two clamping arms 50 can be pushed and pivot, and it is not limited to θ1 being between 1 degree and 10 degrees. In addition, the condition that the second half-angle is greater than the first half-angle means that the opening angle of each clamping arm 50 pivoting outward is not limited to θ2 being between 11 degrees and 20 degrees. For example, when the first half-angle θ1 is 45 degrees, the angle of each clamping arm 50 pivoting outward can be 90 degrees, or even up to 150 degrees, depending on the actual needs.

[0104] In the above embodiment, the tool clamping mechanism 100 includes the chain seat 10 and further constitutes the chain belt so that the chain belt can become part of a chain-type tool magazine. However, it should be noted that in many types of tool magazines, the tool clamping mechanism may not include the chain seat 10, but rather the base 20, the control lever 30, the return member 40, and the two clamping arms 50 together form a unit mechanism with effort-saving tool release, and this unit mechanism can be applied to, but is not limited to, a hat-shaped tool magazine.

[0105] The above description is only a preferred embodiment of the present invention. Any equivalent changes made by applying the present invention specification and the claims should be included within the patent scope of the present invention.

Claims

1. A tool clamping mechanism for a machining machine, used to clamp a tool holder, characterized in that, It includes: A base with a shaft hole; A control lever passes through the shaft hole and can move along an axis between a first position and a second position, and one end of the control lever is provided with a linkage. The two clamping arms are pivotally connected to the base and can be clamped or opened relative to each other. Each of the two clamping arms has a driven part. When the control lever is in the first position, the two clamping arms can clamp the tool bar; when the control lever is in the second position, the linkage part of the control lever actuates each of the linkage parts of the two clamping arms, so that the two clamping arms pivot open and release the tool bar.

2. The tool clamping mechanism of the machining machine as described in claim 1, characterized in that, The linkage of the control lever includes a connecting block and two rollers. The connecting block is connected to the control lever, and the two rollers are disposed on the connecting block and are spaced apart by a fixed distance. The two clamping arms each have a groove to form the linkage, wherein the two rollers are respectively located in a corresponding groove.

3. The tool clamping mechanism of the machining machine as described in claim 2, characterized in that, The grooves of the two clamping arms are respectively set along a virtual first extension line and a second extension line. The first extension line and the second extension line intersect to form an acute angle. The axis passes through the intersection point of the first extension line and the second extension line. When the control lever is in the first position, the axis divides the acute angle into two equal first half-angles. When the control lever is in the second position, the axis divides the acute angle into two equal second half-angles. The second half-angle is larger than the first half-angle.

4. The tool clamping mechanism of the machining machine as described in claim 3, characterized in that, The first half-angle is less than or equal to 45 degrees.

5. The tool clamping mechanism of the machining machine as described in claim 2, characterized in that, The control rod has a screw hole arranged along the axial direction, the connecting block has a through hole, a bolt passes through the through hole and is locked into the screw hole, and the bolt fixes the connecting block to the control rod; the connecting block has a lateral groove on each side of the through hole, and the two rollers are respectively located in each of the lateral grooves and in the grooves of the corresponding clamping arms.

6. The tool clamping mechanism of the machining machine as described in claim 1, characterized in that, The device includes a chain seat having a connecting portion and a linked portion, the chain seat being connected to the linked portion of an adjacent chain seat via the connecting portion; a base being detachably attached to the chain seat; a control lever having a head located on the opposite side of the linkage portion; the control lever passing through a through hole in the chain seat; and the linkage portion and the head being located on opposite sides of the chain seat.

7. The tool clamping mechanism of the machining machine as described in claim 1, characterized in that, The base includes a fixing block, an upper clamping plate and a lower clamping plate. The fixing block has the shaft hole. The upper clamping plate and the lower clamping plate are fixed to both sides of the fixing block, and an movable space is formed between the upper clamping plate and the lower clamping plate. The part of the two clamping arms with the driven part is located in the movable space. The two clamping arms are pivotally connected to the base by passing through the upper clamping plate and the lower clamping plate through a pivot.

8. The tool clamping mechanism of the machining machine as described in claim 1, characterized in that, The inner edges of the two clamping arms each have a first positioning block and a second positioning block. The first positioning block has a first width, and the second positioning block has a second width, wherein the first width is smaller than the second width.

9. The tool clamping mechanism of the machining machine as described in claim 1, characterized in that, It includes a response element that provides a thrust to the control lever to maintain the control lever's movement toward the first position.

10. The tool clamping mechanism of the machining machine as described in claim 9, characterized in that, The control lever has a head located on the opposite side of the linkage; the return member includes a spring that is sleeved on the control lever, with one end of the spring abutting against the base and the other end abutting against the head of the control lever.

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