Jig with high positioning precision

Abstract

The utility model discloses a jig with high positioning accuracy, which comprises a first clamping mechanism, the first clamping mechanism comprises a clamping component and a fastening component, the clamping component comprises a positioning piece and a clamping piece, the clamping piece and the positioning piece can clamp a product, and the fastening component is arranged on the positioning piece. The fastening assembly comprises a first support, a rotating arm rotationally arranged on the first support and a pre-tightening assembly arranged between the rotating arm and the first support, the clamping piece is arranged at the free end of the rotating arm, and the pre-tightening assembly comprises a body, a screw rod in threaded connection with the body and an elastic piece arranged on the screw rod; the body is arranged on the first support, the elastic piece is located on the side, away from the positioning piece, of the rotating arm, the fastening assembly further comprises a power piece, and the power piece is used for driving the rotating arm to rotate so that the clamping piece and the positioning piece can clamp a product. According to the utility model, clamping errors and part size differences can be overcome, and the clamping and positioning precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures, in particular to a fixture with high positioning accuracy. Background Art

[0002] In some metal parts machining processes, the metal parts are first clamped in a fixture and then machined by a machine tool.

[0003] Conventionally, the fixture includes a positioning block, a clamping block, and a first oil cylinder that drives the clamping block to move closer to or away from the positioning block. The positioning block can position the metal part. The first oil cylinder drives the clamping block to move, and the clamping block and the positioning block clamp the metal part in the horizontal direction.

[0004] However, when processing some parts, their shapes need to be positioned. The dimensions of the shapes of each part are different. In addition, there will be errors in the stroke of the first cylinder driving the clamping block to move. Sometimes some metal parts are not clamped in place, resulting in defective processed products. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a fixture with high positioning accuracy, which can overcome the clamping error and the difference in part size and improve the clamping positioning accuracy.

[0006] According to the first aspect of the utility model, a jig with high positioning accuracy comprises a first clamping mechanism, wherein the first clamping mechanism comprises a clamping assembly and a fastening assembly, the clamping assembly comprises a positioning piece and a clamping piece, the clamping piece and the positioning piece can clamp a product, the fastening assembly comprises a first support, a rotating arm rotatably disposed on the first support, and a pre-tightening assembly disposed between the rotating arm and the first support, the clamping piece is disposed at the free end of the rotating arm, the pre-tightening assembly comprises a main body, a screw threadedly connected to the main body, and an elastic piece disposed on the screw, the main body is disposed on the first support, the elastic piece is located on the side of the rotating arm away from the positioning piece, and the fastening assembly also comprises a power piece, which is used to drive the rotating arm to rotate so that the clamping piece and the positioning piece clamp the product.

[0007] A fixture with high positioning accuracy according to an embodiment of the utility model has at least the following beneficial effects:

[0008] 1. The utility model provides a first support, a rotating arm and a pre-tightening assembly, wherein the pre-tightening assembly has a screw and an elastic member. Therefore, the screw is rotated to make the elastic member and the rotating arm abut against each other, and the rotating arm is rotated to make the clamping member close to the positioning member. Under the action of the elastic force, the clamping member and the positioning member pre-clamp and position the product, which is conducive to clamping the product in other directions using other clamping mechanisms, and can position each part with size differences, thereby overcoming the problem that the parts cannot be clamped and positioned due to errors in the clamping stroke of the power part, and improving the positioning accuracy of the parts. At the same time, the structure of using the rotating arm to drive the clamping member close to the positioning member can reduce the stroke of the screw, reduce the number of rotations of the screw, and greatly improve the convenience of pre-positioning.

[0009] 2. The utility model sets a power piece and utilizes the power piece to drive the rotating arm to rotate, so that the clamping piece and the positioning piece can firmly clamp the product. The clamping force of the power piece and the pre-tightening assembly acts on the rotating arm, thereby greatly improving the clamping reliability. At the same time, the structure of the clamping mechanism is more compact and the size of the fixture is reduced.

[0010] According to some embodiments of the utility model, the clamping assembly includes a second support, the power member is a first oil cylinder, the first oil cylinder includes a cylinder body and a piston rod that are slidably connected, the second support is connected to the cylinder body, and the piston rod is used to abut against the rotating arm.

[0011] According to some embodiments of the utility model, the first support is provided with a limit pin, the limit pin is located on the side of the rotating arm away from the first oil cylinder, and the limit pin is used to abut against the rotating arm.

[0012] According to some embodiments of the present utility model, the elastic member is a spring, and an abutment portion is provided at the end of the spring, and the abutment portion is used to abut against the rotating arm.

[0013] According to some embodiments of the present utility model, two first clamping mechanisms are provided, and the two first clamping mechanisms are distributed side by side in the horizontal direction.

[0014] According to some embodiments of the present invention, it includes a substrate and a first support seat arranged on the substrate, wherein the first support seat is used to support the product.

[0015] According to some embodiments of the utility model, a second clamping mechanism is also included, the second clamping mechanism includes a first clamping finger and a first clamping cylinder driving the first clamping finger to clamp, and the first clamping finger and the first support seat clamp the product up and down.

[0016] According to some embodiments of the utility model, a third clamping mechanism is also included, which includes a second clamping finger, a connecting seat arranged on the substrate, and a second clamping cylinder that drives the second clamping finger to clamp, the connecting seat is provided with a first inclined surface and a second inclined surface, the second clamping cylinder is provided on the first inclined surface, the second inclined surface is provided with a second supporting seat, the second supporting seat supports the inclined portion of the product, and the second clamping finger and the second supporting seat clamp the inclined portion of the product.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a fixture with high positioning accuracy according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A structural schematic diagram of a fixture with high positioning accuracy from another perspective is shown;

[0021] Figure 3 for Figure 1 A schematic structural diagram of a first clamping mechanism of a jig with high positioning accuracy is shown;

[0022] Figure 4 for Figure 1 A schematic structural diagram from another perspective of a first clamping mechanism of a jig with high positioning accuracy is shown.

[0023] Figure markings: 100-first clamping mechanism, 110-positioning member, 120-clamping member, 130-product, 140-first support, 150-rotating arm, 160-screw, 170-first cylinder, 180-limit pin, 190-abutment portion, 200-first supporting seat, 210-first clamping finger, 220-first clamping cylinder, 230-second clamping finger, 240-connecting seat, 250-second clamping cylinder, 260-first inclined surface, 270-second inclined surface, 280-substrate, 290-second supporting seat, 300-second support. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] A jig with high positioning accuracy according to an embodiment of the utility model is described below in conjunction with the accompanying drawings.

[0029] Reference Figure 1A fixture with high positioning accuracy according to an embodiment of the utility model includes a first clamping mechanism 100, the first clamping mechanism 100 includes a clamping assembly and a fastening assembly, the clamping assembly includes a positioning member 110 and a clamping member 120, the clamping member 120 and the positioning member 110 can clamp a product 130, the fastening assembly includes a first support 140, a rotating arm 150 rotatably arranged on the first support 140, and a pre-tightening assembly arranged between the rotating arm 150 and the first support 140, the clamping member 120 is arranged at the free end of the rotating arm 150, the pre-tightening assembly includes a body, a screw 160 threadedly connected to the body, and an elastic member arranged on the screw 160, the body is arranged on the first support 140, the elastic member is located on the side of the rotating arm 150 away from the positioning member 110, and the fastening assembly also includes a power member, which is used to drive the rotating arm 150 to rotate so that the clamping member 120 and the positioning member 110 clamp the product 130.

[0030] In some embodiments of the utility model, the clamping assembly includes a second support 300, the power member is a first cylinder 170, the first cylinder 170 includes a cylinder body and a piston rod connected in a sliding manner, the cylinder body is connected to the second support 300, and the piston rod is used to abut against the rotating arm 150.

[0031] Therefore, avoiding the structure in which the first oil cylinder 170 is hinged to the rotating arm 150 helps the fastening assembly to drive the rotating arm 150 to rotate, so that the clamping member 120 and the positioning member 110 pre-clamp and position the product 130.

[0032] In some embodiments of the present invention, the first support 140 is provided with a limit pin 180 , and the limit pin 180 is located on a side of the rotating arm 150 away from the first cylinder 170 , and the limit pin 180 is used to abut against the rotating arm 150 .

[0033] Therefore, the limiting pin 180 can limit the rotating arm 150 to prevent the first oil cylinder 170 from having an excessive thrust and damaging the fastening assembly.

[0034] In some embodiments of the present invention, the elastic member is a spring, and an abutment portion 190 is provided at the end of the spring. The abutment portion 190 is used to abut against the rotating arm 150 .

[0035] It should be noted that the spring is arranged inside the screw rod 160 (the spring is not shown in the figure) and is an integrated structure. Of course, it can also be a spring screw. The spring screw is a prior art and can be purchased on the market.

[0036] In some embodiments of the present invention, two first clamping mechanisms 100 are provided, and the two first clamping mechanisms 100 are distributed side by side in the horizontal direction, thereby further improving the positioning accuracy of the product 130.

[0037] In some embodiments of the present invention, a substrate 280 and a first support base 200 disposed on the substrate 280 are included. The first support base 200 is used to support the product 130. Therefore, the first support base 200 can specifically support a certain part of the product 130, which is beneficial for machining.

[0038] In some embodiments of the present invention, a second clamping mechanism is also included, which includes a first clamping finger 210 and a first clamping cylinder 220 that drives the first clamping finger 210 to clamp. The first clamping finger 210 and the first support seat 200 clamp the product 130 up and down, thereby further improving the firmness of the clamping of the product 130 and avoiding position displacement of the product 130 during the processing of the product 130.

[0039] In some embodiments of the present invention, a third clamping mechanism is also included, which includes a second clamping finger 230, a connecting seat 240 arranged on a base plate 280, and a second clamping cylinder 250 for driving the second clamping finger 230 to clamp. The connecting seat 240 is provided with a first inclined surface 260 and a second inclined surface 270. The second clamping cylinder 250 is arranged on the first inclined surface 260, and the second inclined surface 270 is provided with a second supporting seat 290. The second supporting seat 290 supports the inclined portion of the product 130. The second clamping finger 230 and the second supporting seat 290 clamp the inclined portion of the product 130, thereby meeting the clamping requirements of the product.

[0040] Therefore, this embodiment has the following effects:

[0041] 1. The utility model provides a first support 140, a rotating arm 150 and a pre-tightening assembly, wherein the pre-tightening assembly has a screw 160 and an elastic member. Therefore, by rotating the screw 160, the elastic member and the rotating arm 150 abut against each other, and the rotating arm 150 rotates so that the clamping member 120 is close to the positioning member 110. Under the action of the elastic force, the clamping member 120 and the positioning member 110 pre-clamp and position the product 130, thereby facilitating the use of other clamping mechanisms to clamp the product 130 in other directions, and being able to position each part with size differences, overcoming the problem that the parts cannot be clamped and positioned due to errors in the clamping stroke of the power part, and improving the positioning accuracy of the parts. At the same time, by using the structure of the rotating arm 150 to drive the clamping member 120 to approach the positioning member 110, the stroke of the screw 160 can be reduced, the number of rotations of the screw 160 can be reduced, and the convenience of pre-positioning can be greatly improved.

[0042] 2. The utility model sets a power piece and utilizes the power piece to drive the rotating arm 150 to rotate, so that the clamping member 120 and the positioning member 110 firmly clamp the product 130. The clamping forces of the power piece and the pre-tightening assembly act on the rotating arm 150, thereby greatly improving the clamping reliability. At the same time, the structure of the clamping mechanism is more compact and the size of the fixture is reduced.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fixture with high positioning accuracy, characterized in that: The invention comprises a first clamping mechanism (100), wherein the first clamping mechanism (100) comprises a clamping assembly and a fastening assembly, wherein the clamping assembly comprises a positioning member (110) and a clamping member (120), wherein the clamping member (120) and the positioning member (110) are capable of clamping a product (130), and the fastening assembly comprises a first support (140), a rotating arm (150) rotatably disposed on the first support (140), and a pre-tightening assembly disposed between the rotating arm (150) and the first support (140), wherein the clamping member (120) and the positioning member (110) are capable of clamping a product (130). 0) is arranged at the free end of the rotating arm (150), the pre-tightening assembly includes a body, a screw (160) threadedly connected to the body, and an elastic member arranged on the screw (160), the body is arranged on the first support (140), the elastic member is located on the side of the rotating arm (150) away from the positioning member (110), and the fastening assembly also includes a power member, which is used to drive the rotating arm (150) to rotate so that the clamping member (120) and the positioning member (110) clamp the product (130).

2. A jig with high positioning accuracy according to claim 1, characterized in that: The clamping assembly comprises a second support (300), the power member is a first oil cylinder (170), the first oil cylinder (170) comprises a cylinder body and a piston rod which are slidably connected, the second support (300) is connected to the cylinder body, and the piston rod is used to abut against the rotating arm (150).

3. A jig with high positioning accuracy according to claim 2, characterized in that: The first support (140) is provided with a limit pin (180), the limit pin (180) is located on a side of the rotating arm (150) away from the first oil cylinder (170), and the limit pin (180) is used to abut against the rotating arm (150).

4. A jig with high positioning accuracy according to claim 1, characterized in that: The elastic member is a spring, and an abutment portion (190) is provided at the end of the spring. The abutment portion (190) is used to abut against the rotating arm (150).

5. The jig with high positioning accuracy according to claim 1, characterized in that: Two of the first clamping mechanisms (100) are provided, and the two first clamping mechanisms (100) are distributed side by side in the horizontal direction.

6. A jig with high positioning accuracy according to claim 1, characterized in that: It comprises a base plate (280) and a first support seat (200) arranged on the base plate (280), wherein the first support seat (200) is used to support a product (130).

7. A jig with high positioning accuracy according to claim 6, characterized in that: It also includes a second clamping mechanism, which includes a first clamping finger (210) and a first clamping cylinder (220) that drives the first clamping finger (210) to clamp, and the first clamping finger (210) and the first support seat (200) clamp the product (130) up and down.

8. A jig with high positioning accuracy according to claim 6, characterized in that: The third clamping mechanism also includes a second clamping finger (230), a connecting seat (240) arranged on the base plate (280), and a second clamping cylinder (250) driving the second clamping finger (230) to clamp, the connecting seat (240) being provided with a first inclined surface (260) and a second inclined surface (270), the second clamping cylinder (250) being provided on the first inclined surface (260), the second inclined surface (270) being provided with a second supporting seat (290), the second supporting seat (290) supporting the inclined portion of the product (130), and the second clamping finger (230) and the second supporting seat (290) clamping the inclined portion of the product (130).

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