Fixture for electric spark high-direction cutting of annular workpiece

Abstract

The clamp comprises a base and a plurality of arc-shaped supporting arms, the base comprises a vertical plate, the arc-shaped supporting arms are annularly and evenly distributed on the front face of the vertical plate, arc-shaped sliding grooves are formed in the arc-shaped supporting arms, a plug pin penetrates through the arc-shaped sliding grooves and then is connected to the vertical plate in an inserted mode, and the plug pin penetrates through the arc-shaped sliding grooves. The arc-shaped chute is in sliding fit with the outer cylindrical surface of the bolt; a rotating shaft is rotationally installed on a center hole of the vertical plate, the first end of the rotating shaft extends out of the front face of the vertical plate and is provided with a rotating wheel, the inner side end of the arc-shaped supporting arm is connected with the rotating wheel through a rotating pin, and the second end of the rotating shaft extends out of the back face of the vertical plate and is provided with a handle. And a ratchet wheel locking mechanism is arranged between the vertical plate and the rotating shaft. The rotating wheel is driven to rotate by rotating the handle, so that the outer side end of the arc-shaped supporting arm is opened and tightly supported on the inner hole of the annular workpiece, and after the arc-shaped supporting arm is tightly supported in place, the ratchet wheel locking mechanism can prevent the rotating shaft from rotating reversely, and the arc-shaped supporting arm is prevented from being loosened automatically.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp used for high-direction electric spark cutting of annular workpieces. Background Art

[0002] like Figure 1 The figure shows the structure of an annular workpiece. When the annular workpiece is radially cut by wire electric spark cutting, a clamping end face or a hook type is usually used for clamping, which makes it impossible to effectively fix the workpiece, and small steps will appear on the cutting surface and interfere with the cutting path.

[0003] In the prior art, there is a ring-shaped wire cutting fixture with a publication number of CN214489140U, in which a positioning plate can limit the displacement of a workpiece, the workpiece can be continuously wire-cut by rotating the positioning plate, and the processing angle of the workpiece can be adjusted by adjusting the bolt.

[0004] However, the clamps in the above prior art are not suitable for Figure 1 The annular workpiece shown is cut radially, so it is urgent to provide a fixture for high-direction electric spark cutting of the annular workpiece. Utility Model Content

[0005] The main purpose of the utility model is to provide a clamp for high-direction electric spark cutting of annular workpieces, aiming to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model proposes a clamp for high-directional electric spark cutting of annular workpieces, including a base and a plurality of arc-shaped support arms, wherein the base includes a vertical plate, and the plurality of arc-shaped support arms are evenly distributed in a ring shape on the front side of the vertical plate, and an arc-shaped slide groove is provided on the arc-shaped support arm, and a latch pin is inserted into the vertical plate after passing through the arc-shaped slide groove, and the arc-shaped slide groove and the outer cylindrical surface of the latch pin are slidably matched; a rotating shaft is rotatably mounted on the center hole of the vertical plate, and the first end of the rotating shaft extends from the front side of the vertical plate and is installed with a rotating wheel, and the inner end of the arc-shaped support arm is connected to the rotating wheel through a rotating pin, and the second end of the rotating shaft extends from the back side of the vertical plate and is installed with a handle, and a ratchet locking mechanism is installed between the vertical plate and the rotating shaft.

[0007] Preferably, the ratchet locking mechanism includes a ratchet and a pawl, the ratchet is mounted on the rotating shaft, and the first end of the pawl is mounted on the back side of the vertical plate through a pin shaft; a spring seat plate is welded on the back side of the vertical plate, and a spring is arranged between the top surface of the pawl and the spring seat plate, and the spring is always in a compressed state and pushes the second end of the pawl against the ratchet.

[0008] Preferably, the base further includes a horizontal bottom plate and a slider bar arranged on the bottom plate; the bottom plate is arranged at the bottom of the vertical plate.

[0009] Preferably, the base further comprises ribs, which are welded at right angles formed by the top surface of the bottom plate and the back surface of the vertical plate; the number of the ribs is two, which are respectively arranged near the two ends.

[0010] Preferably, the cross section of the slider bar is trapezoidal in shape; there are two slider bars, and the two slider bars are arranged parallel to each other and spaced apart.

[0011] Preferably, an annular platform is integrally formed on the outer circumferential surface of the rotating shaft, the left end surface of the annular platform abuts against the front surface of the vertical plate, and the right end surface of the annular platform abuts against the left end surface of the rotating wheel; the center hole of the rotating wheel and the rotating shaft are interference fit; and a first flat key is arranged between the rotating shaft and the rotating wheel.

[0012] Preferably, the latch and the vertical plate are in interference fit, and a limiting cap is integrally formed on the end of the latch away from the vertical plate, and the diameter of the limiting cap is greater than the groove width of the arc-shaped sliding groove.

[0013] Preferably, the handle includes a connecting plate and a handle rod; the connecting plate is mounted on the end face of the second end of the rotating shaft by means of screws and an anti-rotation pin; the handle rod is welded to the connecting plate; the handle rod, the connecting plate and the rotating shaft together form a Z-shaped structure.

[0014] Preferably, an interference fit is adopted between the ratchet and the rotating shaft, and a second flat key is provided between the ratchet and the rotating shaft.

[0015] Preferably, a plurality of lace grooves are provided on the outer peripheral surface of the rotating wheel; the raised portion between two adjacent lace grooves forms a mounting portion; and the rotating pin is inserted into the mounting portion in an interference fit manner.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are as follows:

[0017] (1) By adopting the clamp provided by the utility model, when clamping the annular workpiece, by turning the handle, the rotating wheel is driven to rotate, so that the outer end of the arc-shaped support arm is opened and tightened on the inner hole of the annular workpiece. When the arc-shaped support arm is tightened in place, the ratchet locking mechanism can prevent the shaft from reversing and prevent the arc-shaped support arm from loosening by itself. By using the clamp to clamp the annular workpiece, the shortcomings of the prior art of clamping by end face or hooking are overcome.

[0018] (2) In the present invention, by adopting a locking mechanism formed by a ratchet and a pawl, the spring is always in a compressed state and pushes the pawl against the ratchet, which can effectively prevent the arc-shaped support arm from loosening by itself. When it is necessary to loosen, it is only necessary to manually push the pawl to overcome the elastic force of the spring to loosen the ratchet. The locking mechanism has a simple structure and reliable locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a ring-shaped workpiece;

[0021] Figure 2 This is a front structural schematic diagram of the clamp provided by the utility model;

[0022] Figure 3 This is a schematic diagram of the back structure of the clamp provided by the utility model;

[0023] Figure 4 A schematic diagram of the structural decomposition of the clamp provided by the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the rotating shaft, ratchet wheel and handle in the utility model;

[0025] Figure 6 This is a schematic diagram of the clamp provided by the utility model after clamping an annular workpiece.

[0026] Explanation of the accompanying drawings: 1. Base; 1a. Vertical plate; 1b. Bottom plate; 1c. Rib plate; 1d. Sliding bar; 2. Arc-shaped support arm; 2a. Arc-shaped slide groove; 3. Latch; 3a. Limiting cap; 4. Rotating shaft; 4a. Ring table; 5. Rotating wheel; 5a. Lace groove; 6. Rotating pin; 7. Handle; 8. Ratchet locking mechanism; 8a. Ratchet; 8b. Paw; 9. Pin; 10. Spring seat plate; 11. First flat key; 12. Screw; 13. Anti-rotation pin; 14. Second flat key; 15. Spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] Combination Figures 2 to 6 As shown, a specific embodiment of a fixture for high-directional electric spark cutting of annular workpieces provided by the utility model is shown, the fixture comprises a base 1 and a plurality of arc-shaped support arms 2, the base 1 comprises a vertical plate 1a, a plurality of arc-shaped support arms 2 are evenly distributed in a ring on the front side of the vertical plate 1a, an arc-shaped slide groove 2a is provided on the arc-shaped support arm 2, a latch 3 passes through the arc-shaped slide groove 2a and is plugged into the vertical plate 1a, the arc-shaped slide groove 2a and the outer cylindrical surface of the latch 3 are slidably matched; a rotating shaft 4 is rotatably mounted on the center hole of the vertical plate 1a, a first end of the rotating shaft 4 extends from the front side of the vertical plate 1a and is installed with a rotating wheel 5, the inner end of the arc-shaped support arm 2 is connected to the rotating wheel 5 through a rotating pin 6, the second end of the rotating shaft 4 extends from the back side of the vertical plate 1a and is installed with a handle 7, and a ratchet locking mechanism 8 is installed between the vertical plate 1a and the rotating shaft 4.

[0031] Combination Figure 6 As shown, when the annular workpiece is clamped, the handle 7 is rotated to drive the rotating wheel 5 to rotate, so that the outer end of the arc-shaped support arm 2 is opened and tightened on the inner hole of the annular workpiece. When the arc-shaped support arm 2 is tightened into place, the ratchet locking mechanism can prevent the rotating shaft 4 from reversing and prevent the arc-shaped support arm 2 from loosening by itself.

[0032] Combination Figure 3As shown, the ratchet locking mechanism 8 includes a ratchet 8a and a pawl 8b, wherein the ratchet 8a is mounted on the rotating shaft 4, and the first end of the pawl 8b is mounted on the back of the vertical plate 1a through a pin 9; a spring seat plate 10 is welded on the back of the vertical plate 1a, and a spring 15 is arranged between the top surface of the pawl 8b and the spring seat plate 10, and the spring 15 is always in a compressed state and pushes the second end of the pawl 8b to abut against the ratchet 8a, which can effectively prevent the arc-shaped support arm from loosening by itself. When it is necessary to loosen, the ratchet 8a can be loosened by manually pushing the pawl 8b to overcome the elastic force of the spring 15. The locking mechanism has a simple structure and reliable locking.

[0033] Combination Figure 2 As shown, the base 1 also includes a horizontal bottom plate 1b and a slider bar 1d arranged on the bottom plate 1b; the bottom plate 1b is arranged at the bottom of the vertical plate 1a. Furthermore, the base 1 also includes a rib plate 1c, which is welded at a right angle formed by the top surface of the bottom plate 1b and the back surface of the vertical plate 1a; the number of the rib plates 1c is two, which are respectively arranged at positions close to both ends. The cross-section of the slider bar 1d is trapezoidal; the number of the slider bars 1d is two, and the two slider bars 1d are arranged parallel to each other and spaced apart. When in use, the slider bar 1d on the bottom surface of the bottom plate 1b is assembled to the dovetail slide groove on the wire cutting work surface for use.

[0034] Combination Figure 5 As shown, an annular platform 4a is integrally formed on the outer circumferential surface of the rotating shaft 4, the left end surface of the annular platform 4a abuts against the front surface of the vertical plate 1a, and the right end surface of the annular platform 4a abuts against the left end surface of the rotating wheel 5; the center hole of the rotating wheel 5 and the rotating shaft 4 are interference fit; a first flat key 11 is provided between the rotating shaft 4 and the rotating wheel 5. The annular platform 4a is provided to play the role of axial limit. The purpose of providing the first flat key 11 is to prevent the rotating wheel 5 from rotating relative to the rotating shaft 4.

[0035] In this embodiment, the latch 3 and the vertical plate 1a are interference fit, and a limiting cap 3a is integrally formed at the end of the latch 3 away from the vertical plate 1a, and the diameter of the limiting cap 3a is larger than the groove width of the arc-shaped slide groove 2a. The limiting cap 3a is buckled on the arc-shaped support arm 2 to prevent the arc-shaped support arm 2 from falling off the latch 3.

[0036] Combination Figure 5 As shown, the handle 7 includes a connecting plate 7a and a handle rod 7b; the connecting plate 7a is installed on the end face of the second end of the rotating shaft 4 through a screw 12 and an anti-rotation pin 13; the handle rod 7b is welded to the connecting plate 7a; the handle rod 7b, the connecting plate 7a and the rotating shaft 4 together form a Z-shaped structure.

[0037] Combination Figure 5 As shown, the ratchet 8 a and the rotating shaft 4 are in interference fit, and a second flat key 14 is provided between the ratchet 8 a and the rotating shaft 4 to prevent the ratchet 8 a from rotating relative to the rotating shaft 4 .

[0038] Combination Figure 2 As shown, a plurality of lace grooves 5a are provided on the outer circumference of the rotating wheel 5. The purpose of providing the lace grooves 5a is to reduce the weight of the rotating wheel 5, so that the manual rotation handle 7 is lighter. The raised portion between two adjacent lace grooves 5a forms a mounting portion 5b; the rotating pin 6 is inserted into the mounting portion 5b in an interference fit manner.

[0039] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fixture for high-direction electric spark cutting of annular workpieces, characterized in that: The invention comprises a base (1) and a plurality of arc-shaped supporting arms (2), wherein the base (1) comprises a vertical plate (1a), the plurality of arc-shaped supporting arms (2) are evenly distributed in an annular manner on the front surface of the vertical plate (1a), the arc-shaped supporting arms (2) are provided with arc-shaped sliding grooves (2a), the latch pin (3) passes through the arc-shaped sliding grooves (2a) and is plugged into the vertical plate (1a), the arc-shaped sliding grooves (2a) and the outer cylindrical surface of the latch pin (3) are slidably matched; a rotating shaft (4) is rotatably mounted on the central hole of the vertical plate (1a), the first end of the rotating shaft (4) extends from the front surface of the vertical plate (1a) and is provided with a rotating wheel (5), the inner side end of the arc-shaped supporting arm (2) is connected to the rotating wheel (5) through a rotating pin (6), the second end of the rotating shaft (4) extends from the back surface of the vertical plate (1a) and is provided with a handle (7), and a ratchet locking mechanism (8) is installed between the vertical plate (1a) and the rotating shaft (4).

2. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: The ratchet locking mechanism (8) comprises a ratchet (8a) and a pawl (8b), wherein the ratchet (8a) is mounted on the rotating shaft (4), and the first end of the pawl (8b) is mounted on the back of the vertical plate (1a) through a pin shaft (9); a spring seat plate (10) is welded on the back of the vertical plate (1a), and a spring (15) is arranged between the top surface of the pawl (8b) and the spring seat plate (10), and the spring (15) is always in a compressed state and pushes the second end of the pawl (8b) to abut against the ratchet (8a).

3. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: The base (1) also includes a horizontal bottom plate (1b) and a slider bar (1d) arranged on the bottom plate (1b); the bottom plate (1b) is arranged at the bottom of the vertical plate (1a).

4. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 3, characterized in that: The base (1) further comprises a rib plate (1c), wherein the rib plate (1c) is welded at a right angle formed by the top surface of the bottom plate (1b) and the back surface of the vertical plate (1a); the rib plates (1c) are two in number and are respectively arranged at positions close to both ends.

5. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 3, characterized in that: The cross section of the slider bar (1d) is in a trapezoidal shape; the number of the slider bars (1d) is two, and the two slider bars (1d) are arranged parallel to each other and at intervals.

6. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: An annular platform (4a) is integrally formed on the outer peripheral surface of the rotating shaft (4); the left end surface of the annular platform (4a) abuts against the front surface of the vertical plate (1a), and the right end surface of the annular platform (4a) abuts against the left end surface of the rotating wheel (5); the center hole of the rotating wheel (5) and the rotating shaft (4) are interference fit; and a first flat key (11) is provided between the rotating shaft (4) and the rotating wheel (5).

7. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: The latch pin (3) and the vertical plate (1a) are in interference fit, and a limiting cap (3a) is integrally formed on the end of the latch pin (3) away from the vertical plate (1a), and the diameter of the limiting cap (3a) is greater than the groove width of the arc-shaped sliding groove (2a).

8. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: The handle (7) comprises a connecting plate (7a) and a handle rod (7b); the connecting plate (7a) is mounted on the end surface of the second end of the rotating shaft (4) via a screw (12) and an anti-rotation pin (13); the handle rod (7b) is welded to the connecting plate (7a); the handle rod (7b), the connecting plate (7a) and the rotating shaft (4) together form a Z-shaped structure.

9. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 2, characterized in that: An interference fit is adopted between the ratchet wheel (8a) and the rotating shaft (4), and a second flat key (14) is arranged between the ratchet wheel (8a) and the rotating shaft (4).

10. A fixture for high-direction electric spark cutting of annular workpieces as claimed in claim 1, characterized in that: A plurality of lace grooves (5a) are provided on the outer peripheral surface of the rotating wheel (5); a raised portion between two adjacent lace grooves (5a) forms a mounting portion (5b); and the rotating pin (6) is inserted into the mounting portion (5b) in an interference fit manner.

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