Adjustable bracket suitable for small shaft parts

Abstract

The utility model provides an adjustable bracket suitable for small-sized shaft parts, which is used for solving the technical problems that the existing bracket is large in size, is easy to interfere with a tailstock of a tool turret when the small-sized shaft parts are processed, and is easy to cause difficulty in pin arrangement of a machine tool. Due to the fact that the reset spring is arranged, when no workpiece is placed, the front positioning plate can be reset and retracted, and interference between the bracket and an external structure is avoided. And after the bracket is initially installed in place, when the bracket rotates to other tool positions along with the tool turret, pin arrangement of the machine tool is not affected. A kidney-shaped hole used for adjusting the position is formed in the rear positioning plate, the rear positioning plate moves up and down in the length direction of the kidney-shaped hole to drive the workpiece, the center point of the workpiece is aligned with the center of the tailstock, and position positioning is accurate.

Description

Technical Field

[0001] The utility model relates to a workpiece bracket, in particular to an adjustable bracket suitable for small shaft parts. Background Art

[0002] When CNC lathes process shaft parts in batches, auxiliary clamping tooling brackets are required. The brackets are generally installed on the main body of the machine tool to place and support shaft parts. The brackets can improve the clamping accuracy and reduce the workload of operators. In order to be suitable for shaft parts of different sizes, the brackets are generally designed with adjustment functions in mind. For example, Chinese patent CN203875622U discloses an adjustable bracket for machining shaft parts of machine tools. A support base and a part support body are provided on the workbench of the machine tool. The shaft parts are placed in the V-groove of the part support body. By adjusting the pressure plate on one side of the V-groove, shaft parts of different sizes can be placed. However, its disadvantage is that the bracket installed on the machine body is large in size, and there is a risk of collision with the turret tailstock of the lathe, especially when processing small shaft parts, it is easy to interfere with the turret tailstock. Secondly, large brackets are not easy to install, which can easily cause difficulties in machine tool pin removal. Utility Model Content

[0003] The utility model aims to solve the technical problems that the existing bracket is large in size, easily interferes with the tailstock of the turret when processing small shaft parts, and easily causes difficulty in machine tool pin removal, and proposes an adjustable bracket suitable for small shaft parts.

[0004] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0005] An adjustable bracket suitable for small shaft parts, which is special in that it includes a supporting base plate arranged on a lathe turret, two rear positioning plates movably mounted on two sides of the supporting base plate, and a front positioning plate connected to the rear positioning plates through a spring assembly;

[0006] The rear positioning plate is in the shape of a right-angled triangle, and the rear positioning plate is movably mounted on the side of the supporting base plate along one of the right-angled sides; the rear positioning plate is provided with a first joint axis hole at a vertex away from the right-angled side, and a first positioning member and a second positioning member for abutting the front positioning plate, the first positioning member and the second positioning member are located between the first joint axis hole and the right-angled side, and the first positioning member is provided close to the hypotenuse of the rear positioning plate;

[0007] The front positioning plate is provided with a third positioning piece and a second joint axis hole corresponding to the first joint axis hole, and the third positioning piece is arranged on a side of the second joint axis hole away from the first positioning piece; the spring assembly includes a joint axis pin and a return spring; the joint axis pin passes through the second joint axis hole and the first joint axis hole in sequence to connect the front positioning plate to the rear positioning plate; the return spring is sleeved on the joint axis pin, one end of the return spring is connected to the first positioning piece around, and the other end is connected to the third positioning piece; a placement groove for placing a workpiece is formed between the hypotenuse of the front positioning plate and the rear positioning plate; the first positioning piece is used to limit the front positioning plate when the workpiece is not placed, and the second positioning piece is used to limit the front positioning plate when the workpiece is placed.

[0008] Furthermore, a waist-shaped hole is provided on the rear positioning plate along the right-angled side, and the length of the waist-shaped hole is provided along the vertical direction;

[0009] The two side surfaces of the support base plate are provided with a plurality of threaded holes and adjusting screws, and the adjusting screws pass through the waist-shaped holes and the threaded holes in sequence to connect and fix the two rear positioning plates to the side surfaces of the support base plate respectively.

[0010] Furthermore, the first positioning member includes a first stop pin hole and a first stop pin installed in the first stop pin hole, and the second positioning member includes a second stop pin hole and a second stop pin installed in the second stop pin hole; the first stop pin hole is close to the hypotenuse of the rear positioning plate; one end of the return spring is connected to the first stop pin.

[0011] Further, the third positioning member includes a third stop pin hole and a third stop pin installed in the third stop pin hole, and the other end of the return spring is sleeved on the third stop pin.

[0012] Furthermore, the front positioning plate is trapezoidal, and the bottom edge of the front positioning plate and the oblique edge of the rear positioning plate form a V-shaped placement groove; when a workpiece is placed in the placement groove, the bottom edge of the front positioning plate abuts against the second stop pin; when no workpiece is placed in the placement groove, the bottom edge of the front positioning plate abuts against the first stop pin.

[0013] Furthermore, the support base plate is made of cubic aluminum material, and a through hole is arranged on the end surface of the support base plate. Screws pass through the through hole to fix the support base plate to the turret.

[0014] Furthermore, the top corner of the rear positioning plate away from the waist-shaped hole is set to an arc angle to avoid interference with external structures.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model is an adjustable bracket suitable for small shaft parts. A waist-shaped hole for adjusting the position is arranged on the rear positioning plate. The rear positioning plate moves up and down along the length direction of the waist-shaped hole to drive the workpiece to adjust the position so that the center point of the workpiece is aligned with the top of the tailstock to achieve accurate positioning.

[0017] 2. The utility model discloses an adjustable bracket suitable for small shaft parts, which is lightweight and has a supporting base plate mounted on a turret, so that the bracket can be adjusted in position as the turret moves. The utility model is mainly used for small shaft parts and scenes that are not suitable for traditional bracket loading.

[0018] 3. The utility model is suitable for an adjustable bracket for small shaft parts. A reset spring is provided. When no workpiece is placed, the front positioning plate can be reset and retracted to avoid interference between the bracket and the external structure. After the bracket is initially installed, it will not affect the machine tool pin when it moves to other tool positions with the turret.

[0019] 4. The utility model is an adjustable bracket suitable for small shaft parts, which can flexibly adjust the position of the rear positioning plate. The rear positioning plates located on both sides of the supporting bottom plate can be synchronously adjusted along the length direction of the waist-shaped hole, so that the center of the workpiece is accurately aligned with the lathe top. The two rear positioning plates can also be adjusted to different heights along the length direction of the waist-shaped hole, so as to support shaft parts with different diameters at both ends. The versatility of the bracket is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0021] Figure 2 This is a front view of a supporting base plate in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0022] Figure 3 It is a side view of a supporting bottom plate in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0023] Figure 4 This is a structural schematic diagram of a rear positioning plate in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0024] Figure 5 This is a structural schematic diagram of a front positioning plate in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0025] Figure 6 This is a schematic structural diagram of a return spring in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0026] Figure 7It is a side view of a return spring in an embodiment of an adjustable bracket suitable for small shaft parts of the utility model;

[0027] Description of reference numerals:

[0028] 1-support base plate, 11-through hole, 12-threaded hole; 2-rear positioning plate, 21-waist-shaped hole, 22-first stop pin hole, 23-second stop pin hole, 24-first joint axis hole; 3-front positioning plate, 31-second joint axis hole, 32-third stop pin hole; 4-adjusting screw; 5-first stop pin; 6-second stop pin; 7-third stop pin; 8-joint axis pin; 9-reset spring; 10-workpiece. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0030] like Figure 1-Figure 7 As shown, the utility model proposes an adjustable bracket suitable for small shaft parts, including a supporting base plate 1, and two sets of positioning components installed on both sides of the supporting base plate 1. Each set of positioning components includes a front positioning plate 3 and a rear positioning plate 2, the rear positioning plate 2 is fixedly connected to both sides of the supporting base plate 1, and the front positioning plate 3 is connected to the upper end of the rear positioning plate 2.

[0031] like Figure 2 , Figure 3 As shown, the support base plate 1 is a cubic aluminum block installed on the lathe turret. Four through holes 11 are provided on the upper end surface of the support base plate 1, respectively located at the four vertex corners of the support base plate 1. Find an empty tool position on the turret of the lathe, and use screws to pass through the through holes 11 to fix the support base plate 1 on the turret. A plurality of threaded holes 12 are provided on two opposite sides of the support base plate 1.

[0032] like Figure 4As shown, the rear positioning plate 2 is in the shape of a right triangle as a whole, and the top corner where the rear positioning plate 2 is connected to the front positioning plate 3 is arc-shaped. A waist-shaped hole 21 is provided near a right-angled side of the rear positioning plate 2, and the length direction of the waist-shaped hole 21 is provided along the right-angled side and is located in the vertical direction. The width of the waist-shaped hole 21 is slightly larger than the aperture of the threaded hole 12 on the side of the supporting base plate 1, so as to facilitate the movement of the rear positioning plate 2. In this embodiment, the width of the waist-shaped hole 21 is 2 mm wider than the aperture of the threaded hole 12. After passing the adjusting screw 4 through the waist-shaped hole 21, it is installed in the threaded hole 12 to fix the rear positioning plate 2 on the side of the supporting base plate 1. Along the length direction of the waist-shaped hole 21, the positions of the two rear positioning plates 2 can be adjusted synchronously so that the center point of the workpiece 10 is aligned with the tailstock top of the lathe. For shaft parts with unequal diameters at both ends, the two rear positioning plates 2 can be adjusted to different heights along the length direction of the waist-shaped hole 21, so as to better adapt to shaft parts with different diameters at both ends. The top angle of the rear positioning plate 2 away from the waist-shaped hole 21 is an arc-shaped top angle, and a first joint shaft hole 24, a first stop pin hole 22 and a second stop pin hole 23 are arranged at the arc-shaped top angle.

[0033] like Figure 5 As shown, the front positioning plate 3 is trapezoidal in shape as a whole, and a second joint axis hole 31 corresponding to the first joint axis hole 24 is provided on the front positioning plate 3. The joint axis pin 8 is hammered into the second joint axis hole 31 and the first joint axis hole 24 in sequence, and the front positioning plate 3 is connected to the rear positioning plate 2. The bottom edge of the front positioning plate 3 and the hypotenuse of the rear positioning plate 2 form a V-shaped groove for placing the workpiece 10. A third stop pin hole 32 is also provided on the front positioning plate 3.

[0034] The first stop pin hole 22, the second stop pin hole 23 and the third stop pin hole 32 are respectively installed with the first stop pin 5, the second stop pin 6 and the third stop pin 7. The joint shaft pin 8 is located between the first stop pin 5 and the second stop pin 6. The second stop pin 6 abuts against the bottom edge of the front positioning plate 3. The joint shaft pin 8 is sleeved with a return spring 9. The return spring 9 is as shown in FIG. Figure 6 , Figure 7 The two ends of the return spring 9 extend outwards respectively, one end of which surrounds the periphery of the first stop pin 5 , and the other end of which surrounds the periphery of the third stop pin 7 .

[0035] Working process: When using for the first time, adjust the turret with the bracket installed to the current tool, put the workpiece 10 into the V-groove between the front positioning plate 3 and the rear positioning plate 2 of the bracket, the reset spring 9 is in a stretched state, and the bottom edge of the front positioning plate 3 abuts the second stop pin 6. Move the turret so that the workpiece 10 is on the center line of the chuck and the tailstock top, and record the coordinate value. The tailstock top is ejected, and the turret rotates counterclockwise to disengage the bracket from the workpiece 10. The reset spring 9 begins to reset from the stretched state, driving the bottom edge of the front positioning plate 3 away from the second stop pin 6, and finally resets to the bottom edge of the front positioning plate 3 abutting the first stop pin 5. During subsequent processing, the coordinate values ​​recorded for the first time are written into the program, the tool position where the bracket is located is directly positioned at the appropriate position, the workpiece 10 is placed on the bracket, and the processing is started directly.

[0036] The utility model has a compact and simple structure. The front positioning plate 3 can be reset and retracted when there is no workpiece 10, thereby avoiding interference between the bracket and the equipment. When the center of the workpiece 10 is aligned with the top by traditional manual adjustment, there is a hidden danger of misalignment of the top hole. The bracket of the utility model is installed on the turret and can be adjusted with the turret. It is easy to use and has accurate positioning. And the workpiece 10 is placed on the bracket, which greatly reduces the labor intensity of hand-held clamping.

Claims

1. An adjustable bracket suitable for small shaft parts, characterized in that: It comprises a supporting base plate (1) arranged on a lathe turret, two rear positioning plates (2) movably mounted on two sides of the supporting base plate (1), and a front positioning plate (3) connected to the rear positioning plates (2) via a spring assembly; The rear positioning plate (2) is in the shape of a right triangle, and the rear positioning plate (2) is movably mounted on the side of the supporting base plate (1) along one of the right-angled sides; the rear positioning plate (2) is provided with a first joint axis hole (24) at the top corner away from the right-angled side, and a first positioning member and a second positioning member for abutting the front positioning plate (3), the first positioning member and the second positioning member are located between the first joint axis hole (24) and the right-angled side, and the first positioning member is arranged close to the hypotenuse of the rear positioning plate (2); The front positioning plate (3) is provided with a third positioning member and a second joint axis hole (31) corresponding to the first joint axis hole (24), and the third positioning member is arranged on a side of the second joint axis hole (31) away from the first positioning member; the spring assembly comprises a joint axis pin (8) and a return spring (9); the joint axis pin (8) passes through the second joint axis hole (31) and the first joint axis hole (24) in sequence to connect the front positioning plate (3) to the rear positioning plate (2); the return spring (9) is sleeved on the joint axis pin (8), one end of the return spring (9) is connected to the first positioning member around, and the other end is connected to the third positioning member; a placement groove for placing a workpiece (10) is formed between the hypotenuses of the front positioning plate (3) and the rear positioning plate (2); the first positioning member is used to limit the front positioning plate (3) when the workpiece is not placed, and the second positioning member is used to limit the front positioning plate (3) when the workpiece is placed.

2. The adjustable bracket suitable for small shaft parts according to claim 1, characterized in that: A waist-shaped hole (21) is provided on the rear positioning plate (2) along the right-angled side, and the length of the waist-shaped hole (21) is arranged along the vertical direction; The two side surfaces of the support base plate (1) are provided with a plurality of threaded holes (12) and adjusting screws (4), and the adjusting screws (4) pass through the waist-shaped holes (21) and the threaded holes (12) in sequence to connect and fix the two rear positioning plates (2) to the side surfaces of the support base plate (1) respectively.

3. The adjustable bracket suitable for small shaft parts according to claim 2, characterized in that: The first positioning member comprises a first stop pin hole (22) and a first stop pin (5) installed in the first stop pin hole (22); the second positioning member comprises a second stop pin hole (23) and a second stop pin (6) installed in the second stop pin hole (23); the first stop pin hole (22) is close to the hypotenuse of the rear positioning plate (2); one end of the return spring (9) is connected to the first stop pin (5) in a surrounding manner.

4. The adjustable bracket suitable for small shaft parts according to claim 3 is characterized in that: The third positioning member comprises a third stop pin hole (32) and a third stop pin (7) installed in the third stop pin hole (32), and the other end of the return spring (9) is sleeved on the third stop pin (7).

5. The adjustable bracket suitable for small shaft parts according to claim 4, characterized in that: The front positioning plate (3) is trapezoidal, and the bottom edge of the front positioning plate (3) and the oblique edge of the rear positioning plate (2) form a V-shaped placement groove; when a workpiece (10) is placed in the placement groove, the bottom edge of the front positioning plate (3) abuts against the second stop pin (6); when no workpiece (10) is placed in the placement groove, the bottom edge of the front positioning plate (3) abuts against the first stop pin (5).

6. The adjustable bracket suitable for small shaft parts according to claim 5, characterized in that: The support base plate (1) is made of cubic aluminum material. A through hole (11) is provided on the end surface of the support base plate (1). Screws pass through the through hole (11) to fix the support base plate (1) on the turret.

7. An adjustable bracket suitable for small shaft parts according to any one of claims 2 to 6, characterized in that: The top corner of the rear positioning plate (2) away from the waist-shaped hole (21) is set as an arc angle to avoid interference with external structures.

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