Three-point type positioning clamp based on numerical control equipment

Abstract

The utility model relates to the technical field of clamps, and discloses a three-point type positioning clamp based on numerical control equipment, which comprises a bottom plate, two vertical blocks are fixed on one side of the top of the bottom plate, a pneumatic source is arranged on one side of the vertical block facing the rear end, a pressing block is arranged at the movable end of the pneumatic source, and a positioning block is arranged on the pressing block. A positioning hanging table is installed on the other side, facing the rear end, of the vertical block, and a positioning block is installed on the side, facing the positioning hanging table, of the pressing block. According to the three-point type positioning clamp based on the numerical control equipment, when a front fork is positioned, the fork bridge end of the front fork, the outer wall faces of the two fork feet of the front fork and the inner holes of the fork feet of the front fork are positioned, three-point type positioning is achieved, the positioning precision and firmness of the front fork are guaranteed, and the situation that when the front fork is machined, the front fork is damaged is avoided. The situation that the front fork moves is avoided, the machining precision of the front fork is guaranteed, the uniformity of the clamping force of the front fork is also guaranteed, and deformation and damage are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to a three-point positioning jig based on numerical control equipment. Background Technique

[0002] In the bicycle manufacturing industry, as a key load-bearing and steering component, the processing accuracy and clamping stability of the bicycle front fork are directly related to the safety and riding experience of the whole vehicle. With the development of numerical control processing technology, numerical control equipment has been widely used in the processing of bicycle front forks. As an indispensable part of numerical control equipment, the rationality of the fixture design and its clamping performance are crucial for improving processing accuracy and efficiency.

[0003] For the existing related technologies, the following defects often exist: when the traditional positioning jig clamps the bicycle front fork, due to the insufficient relative position accuracy between the positioning points, the workpiece is prone to shift during the processing, affecting the processing accuracy; if the clamping force is unevenly distributed during the clamping process of the jig, it will cause excessive local stress on the front fork, resulting in deformation or damage, and at the same time, it will also affect the quality of the processed surface.

[0004] Therefore, we propose a three-point positioning jig based on numerical control equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a three-point positioning jig based on numerical control equipment to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A three-point positioning jig based on numerical control equipment includes: a bottom plate, on one side of the top of the bottom plate, two vertical blocks are fixed. On the rear side of the vertical block, a pneumatic source is installed. The movable end of the pneumatic source is installed with a pressing block. On the other rear side of the vertical block, a positioning hanging platform is installed. On the side of the pressing block facing the positioning hanging platform, a positioning block is installed;

[0008] On the other side of the top of the bottom plate, a cross bar is installed. Both ends of the cross bar are fixedly connected with square seats. In the middle of the top of the cross bar, a middle groove is opened. On both sides of the top of the cross bar, positioning grooves for clamping the front fork are opened. On the top of the square seat, a pressing component for pressing the front fork is installed.

[0009] As an improved technical solution, a cylinder two is inlaid and installed inside the positioning groove and close to one side of the middle groove. The movable end of the cylinder two is fixedly connected with a pressing rod. A positioning rod is installed inside the positioning groove and far from one side of the middle groove.

[0010] As an improved technical solution, the pressing and holding assembly includes a rotating seat rotatably installed on the top of the square seat, and a cylinder three embedded in the inside of the square seat. At the same time, the movable end of the cylinder three is hingedly connected to the bottom end of the rotating seat, and a pressing and holding head is fixed to the top of the rotating seat.

[0011] As an improved technical solution, a hinge block welded to the top of the square seat and located on the side facing the horizontal bar is also installed on the top of the holding assembly, and hinge plates are rotatably connected between the hinge block and both sides of the rotating seat through a rotating shaft.

[0012] As an improved technical solution, a side convex plate is fixed on the side of the bottom plate close to the horizontal bar, a mounting plate is welded on the top of the side convex plate, a cylinder 1 is fixed in the concave cavity of the mounting plate, the movable end of the cylinder 1 is fixedly connected to a linkage bar, and hanging rods are fixed on both ends of the linkage bar facing the mounting plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model discloses that when positioning the front fork, positioning is performed from the fork bridge end of the front fork, the outer wall surface of the two fork legs of the front fork and the inner hole of the fork legs of the front fork, so as to realize three-point positioning, so as to ensure the accuracy and firmness of the positioning of the front fork, avoid the situation that the front fork is shifted when the front fork is processed, ensure the accuracy of the processing of the front fork, ensure the uniformity of the clamping force of the front fork, and prevent deformation and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a three-point positioning fixture based on CNC equipment;

[0016] Figure 2 It is a top view structural diagram of a horizontal bar in a three-point positioning fixture based on a numerical control device;

[0017] Figure 3 The figure is a schematic diagram of the structure of a pressing component in a three-point positioning fixture based on a CNC device.

[0018] In the figure: 1, bottom plate; 2, vertical block; 21, pneumatic source; 22, pressure block; 23, positioning block; 24, positioning hanging platform; 3, side convex plate; 31, mounting plate; 32, linkage bar; 33, cylinder one; 34, hanging platform rod; 4, horizontal bar; 41, square seat; 42, positioning groove; 43, middle groove; 44, cylinder two; 45, holding assembly; 451, hinge block; 452, cylinder three; 453, hinge plate; 454, rotating seat; 455, holding head; 46, extrusion rod; 47, positioning rod. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 to 3 , the present utility model proposes a technical solution, a three-point positioning fixture based on a numerical control device, including: a bottom plate 1, two vertical blocks 2 are fixed on one side of the top of the bottom plate 1, a pneumatic source 21 is installed on the rearward side of the vertical block 2, a pressing block 22 is installed at the movable end of the pneumatic source 21, a positioning hanging table 24 is installed on the other rearward side of the vertical block 2, and a positioning block 23 is installed on the side of the pressing block 22 facing the positioning hanging table 24;

[0021] On the other side of the top of the bottom plate 1, a cross bar 4 is installed. Both ends of the cross bar 4 are fixedly connected with square seats 41, and the square seats 41 are fixed on the top of the bottom plate 1. A middle groove 43 is opened in the middle of the top of the cross bar 4, and positioning grooves 42 for clamping the front fork are opened on both sides of the top of the cross bar 4. A pressing component 45 for pressing the front fork is installed on the top of the square seat 41.

[0022] When positioning the front fork, positioning is performed from the fork bridge end of the front fork, the outer wall surfaces of the two fork legs of the front fork, and the inner hole of the fork leg of the front fork to achieve three-point positioning, so as to ensure the accuracy and firmness of the front fork positioning, avoid the situation of displacement of the front fork during the processing of the front fork, ensure the processing accuracy of the front fork, and also ensure the uniformity of the clamping force on the front fork, preventing deformation and damage.

[0023] A cylinder two 44 is installed by inlaying on the side of the positioning groove 42 close to the middle groove 43. The movable end of the cylinder two 44 is fixedly connected with a pressing rod 46. A positioning rod 47 is installed on the side of the positioning groove 42 far from the middle groove 43.

[0024] The pressing component 45 includes a rotating seat 454 rotatably installed on the top of the square seat 41, and a cylinder three 452 inlaid inside the square seat 41. At the same time, the movable end of the cylinder three 452 is hinged to the bottom end of the rotating seat 454, and a pressing head 455 is fixed at the top end of the rotating seat 454.

[0025] On the top of the pressing component 45, a hinge block 451 welded to the top end of the square seat 41 and located on the side facing the cross bar 4 is also installed. Hinge plates 453 are rotatably connected between the two sides of the hinge block 451 and the rotating seat 454 through rotating shafts.

[0026] On one side of the bottom plate 1 close to the cross bar 4, a side convex plate 3 is fixed. At the top of the side convex plate 3, a mounting plate 31 is welded. Inside the concave cavity of the mounting plate 31, a first cylinder 33 is fixed, and the movable end of the first cylinder 33 is located on the side away from the cross bar 4. The movable end of the first cylinder 33 is fixedly connected to a linkage bar 32. At both ends of the linkage bar 32 facing the mounting plate 31, hanging platform rods 34 are fixed, and sliding holes for the mounting plate 31 to slide through are formed in the mounting plate 31.

[0027] The working principle of the present utility model is as follows:

[0028] During use, place the front fork flat, and make the two fork foot ends of the front fork face the side of the side convex plate 3 and be respectively located inside the two positioning grooves 42. When the second cylinder 44 extends, the extrusion rod 46 moves towards the fork foot, clamping the fork foot between the extrusion rod 46 and the positioning rod 47. Then, when the third cylinder 452 extends, under the hinge transmission action of the hinge block 451, the hinge plate 453 and the rotating seat 454, the extension of the third cylinder 452 will make the rotating seat 454 move towards the hinge block 451 direction, that is, towards the fork foot direction, pressing the pressing head 455 on the top surface of the fork foot to further fix the fork foot.

[0029] The fork bridge end is located on the side close to the vertical block 2. The pneumatic source 21 controls the pressing block 22 to move towards the fork bridge direction to position the front fork at the position of the vertical block 2.

[0030] When the first cylinder 33 shortens, it drives the linkage bar 32 to move towards the cross bar 4, so that the two hanging platform rods 34 are correspondingly inserted into the inner cavities of the two fork feet to further fix the front fork, thus realizing the clamping of the front fork.

[0031] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-point positioning fixture based on a numerical control device, characterized in that: Comprising: A bottom plate (1), on one side of the top of the bottom plate (1), two vertical blocks (2) are fixed. On the rearward side of the vertical block (2), a pneumatic source (21) is installed. On the movable end of the pneumatic source (21), a pressing block (22) is installed. On the other rearward side of the vertical block (2), a positioning hanging platform (24) is installed. On the side of the pressing block (22) facing the positioning hanging platform (24), a positioning block (23) is installed. On the other side of the top of the bottom plate (1), a cross bar (4) is installed. At both ends of the cross bar (4), square seats (41) are fixedly connected. In the middle of the top of the cross bar (4), a middle groove (43) is opened. On both sides of the top of the cross bar (4), positioning grooves (42) for clamping the front fork are opened. On the top of the square seat (41), a pressing component (45) for pressing the front fork is installed.

2. The three-point positioning fixture based on a numerical control device according to claim 1, wherein: Inside the positioning groove (42) and close to one side of the middle groove (43), a cylinder two (44) is inlaid and installed. On the movable end of the cylinder two (44), a pressing rod (46) is fixedly connected. Inside the positioning groove (42) and far from one side of the middle groove (43), a positioning rod (47) is installed.

3. The three-point positioning fixture based on a numerical control device according to claim 2, characterized in that: The pressing component (45) includes a rotating seat (454) rotatably installed on the top of the square seat (41), and a cylinder three (452) inlaid and installed inside the square seat (41). At the same time, the movable end of the cylinder three (452) is hinged to the bottom end of the rotating seat (454). At the top end of the rotating seat (454), a pressing head (455) is fixed.

4. The three-point positioning fixture based on CNC equipment according to claim 3, characterized in that: On the top of the pressing component (45), a hinge block (451) welded to the top end of the square seat (41) and located on the side facing the cross bar (4) is also installed. Between the two sides of the hinge block (451) and the rotating seat (454), hinge plates (453) are rotatably connected through rotating shafts.

5. A three-point positioning fixture based on a numerical control device according to claim 4, characterized in that: On one side of the bottom plate (1) close to the cross bar (4), a side convex plate (3) is fixed. On the top of the side convex plate (3), a mounting plate (31) is welded. Inside the concave cavity of the mounting plate (31), a cylinder one (33) is fixed. On the movable end of the cylinder one (33), a linkage bar (32) is fixedly connected. At both ends of the side of the linkage bar (32) facing the mounting plate (31), hanging platform rods (34) are fixed.

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