Positioning clamp for machining driven gear

Abstract

The utility model discloses a positioning fixture for machining a driven gear, which comprises a placing table, and a base is fixedly connected below the placing table; according to the positioning clamp for machining the driven gear, the placement table, the base, the center shaft, the clamping jaw, the coarse positioning ball and the fine positioning ball are used in cooperation, and in the using process of the positioning clamp, a driven gear body is placed on the placement table, so that the driven gear body makes contact with the coarse positioning ball and the fine positioning ball; three-point positioning pin coarse positioning is carried out on the driven gear body through the coarse positioning ball, three-point positioning pin fine positioning is carried out on the driven gear body through the fine positioning ball, the three-point positioning pin is positioned at the pitch diameter position of the driven gear body, then the outer wall of the driven gear is pressed through the three clamping jaws to be used for driving rotary machining, and accurate positioning of the driven gear is achieved. The precision of later machining is guaranteed, meanwhile, the product quality of driven gear machining is guaranteed, and then the practicability of the positioning clamp is improved to a certain degree.

Description

Technical Field

[0001] This utility model relates to the technical field of positioning fixtures, specifically a positioning fixture for machining passive gears. Background Technology

[0002] Driven gears are an important component of gear transmission systems. In a pair of meshing gears, power is transmitted from the driving gear, and the driven gear receives the power transmitted by the driving gear and rotates with the driving gear, thereby realizing functions such as power transmission, speed change, or direction of motion conversion. During the machining process, driven gears need to be fixed by positioning fixtures.

[0003] Existing positioning fixtures only use positioning blocks and three jaws to clamp the outer diameter of the driven gear for positioning, which easily leads to long adjustment time for the three jaws when changing lines and the machining accuracy does not meet the requirements. Therefore, it is necessary to propose a positioning fixture for the machining of driven gears. Utility Model Content

[0004] The purpose of this invention is to provide a positioning fixture for machining passive gears, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining passive gears, comprising a placement table, a base fixedly connected to the lower part of the placement table, a central shaft fixedly connected inside the base, a gripper movably connected above the placement table, a passive gear body movably connected to the outer wall of the gripper, a coarse positioning ball fixedly connected above the placement table, and a fine positioning ball fixedly connected above the placement table.

[0006] Preferably, the shape and size of the coarse positioning ball are matched with the shape and size of the driven gear body, and the coarse positioning ball is movably connected to the driven gear body.

[0007] Preferably, the number of coarse positioning balls is three, and the coarse positioning balls are arranged in a circular array at equal intervals above the placement platform with the center of the central axis as the center.

[0008] Preferably, the shape and size of the precision positioning ball are matched with the shape and size of the driven gear body, and the precision positioning ball is movably connected to the driven gear body.

[0009] Preferably, the number of precision positioning balls is three, and the precision positioning balls are arranged in a circular array at equal intervals above the placement platform with the center of the placement platform as the center.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This positioning fixture for machining driven gears utilizes a placement table, base, central shaft, jaws, coarse positioning balls, and fine positioning balls. During use, the driven gear body is placed on the placement table, allowing it to contact the coarse and fine positioning balls. The coarse positioning balls provide three-point coarse positioning, while the fine positioning balls provide three-point fine positioning at the pitch circle diameter. The three jaws then clamp the outer wall of the driven gear for rotational machining. This precise positioning ensures accurate subsequent machining and guarantees the quality of the machined product, thus enhancing the practicality of the positioning fixture. Attached Figure Description

[0012] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0013] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0014] Figure 3 This is a top view of the structure of this utility model.

[0015] In the diagram: 1. Placement platform; 2. Base; 3. Central shaft; 4. Gripper; 5. Driven gear body; 6. Coarse positioning ball; 7. Fine positioning ball. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a positioning fixture for machining driven gears, comprising a placement table 1, a base 2 fixedly connected to the lower part of the placement table 1, a central shaft 3 fixedly connected inside the base 2, a gripper 4 movably connected above the placement table 1, a driven gear body 5 movably connected to the outer wall of the gripper 4, and coarse positioning balls 6 fixedly connected above the placement table 1. The shape and size of the coarse positioning balls 6 match the shape and size of the driven gear body 5. The coarse positioning balls 6 are movably connected to the driven gear body 5, facilitating quick contact with the driven gear body 5 and improving the clamping efficiency of the driven gear body 5. There are three coarse positioning balls 6 arranged in a ring around the center of the central shaft 3. The gears are arranged at equal intervals above the placement platform 1 to expand the area for positioning the passive gear body 5 and improve the positioning effect. A precision positioning ball 7 is fixedly connected above the placement platform 1. The shape and size of the precision positioning ball 7 match the shape and size of the passive gear body 5. The precision positioning ball 7 is movably connected to the passive gear body 5, which facilitates quick docking between the passive gear body 5 and the precision positioning ball 7 and makes it convenient to accurately position the passive gear body 5. There are three precision positioning balls 7. The precision positioning balls 7 are arranged in a circular array at equal intervals above the placement platform 1 with the center of the placement platform 1 as the center, which expands the contact area with the passive gear body 5 and thus improves the positioning effect of the passive gear body 5.

[0018] Working principle: When using this positioning fixture for machining driven gears, first place the driven gear body 5 on the placement table 1, so that the driven gear body 5 contacts the coarse positioning ball 6 and the fine positioning ball 7 respectively. The coarse positioning ball 6 performs three-point positioning pin coarse positioning of the driven gear body 5, and the fine positioning ball 7 performs three-point positioning pin fine positioning at the pitch circle diameter of the driven gear body 5. Then, the three jaws 4 press the outer wall of the driven gear body 5 to drive rotational machining. In this way, the use of the positioning fixture for machining driven gears is completed.

[0019] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0020] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning fixture for machining driven gears, comprising a placement table (1), characterized in that: A base (2) is fixedly connected to the bottom of the placement platform (1), a central shaft (3) is fixedly connected inside the base (2), a gripper (4) is movably connected to the top of the placement platform (1), a driven gear body (5) is movably connected to the outer wall of the gripper (4), a coarse positioning ball (6) is fixedly connected to the top of the placement platform (1), and a fine positioning ball (7) is fixedly connected to the top of the placement platform (1).

2. A positioning fixture for machining driven gears according to claim 1, characterized in that, The shape and size of the coarse positioning ball (6) are matched with the shape and size of the passive gear body (5), and the coarse positioning ball (6) is movably connected to the passive gear body (5).

3. A positioning fixture for machining driven gears according to claim 1, characterized in that, The number of coarse positioning balls (6) is three. The coarse positioning balls (6) are arranged in a circular array with the center of the central axis (3) as the center and are evenly spaced above the placement platform (1).

4. A positioning fixture for machining driven gears according to claim 1, characterized in that, The shape and size of the precision positioning ball (7) are matched with the shape and size of the passive gear body (5), and the precision positioning ball (7) is movably connected to the passive gear body (5).

5. A positioning fixture for machining driven gears according to claim 1, characterized in that, The number of the precision positioning balls (7) is three. The precision positioning balls (7) are arranged in a circular array at equal intervals above the placement platform (1) with the center of the placement platform (1) as the center.

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