CN207013741U - A kind of frock for turning eccentric shaft parts - Google Patents

Abstract

The utility model discloses a tooling for turning eccentric shaft parts, which comprises a clamping disk and a three-jaw chuck of a lathe. The three-jaw chuck is provided with three equally divided and automatically centered claws. The clamping disc is clamped in the center of the jaw. The clamping disc is a section of cylinder, and the cylinder is provided with a positioning inner hole eccentrically with the outer circle of the cylinder along the axis direction, and the positioning inner hole is provided with an opening groove through the outer circle in the radial direction, and the Two square grooves are arranged on the outer circle of the clamping disc, and the two square grooves are parallel to the axis of the positioning inner hole. The three-jaw chuck clamps the outer circle of the clamping disc, and elastic deformation occurs at the first square groove and the second square groove, so that the clamping disc clamps the workpiece in the center and starts turning. The utility model is easy to operate, avoids the trouble of repeatedly adjusting the eccentricity of the chuck for each batch, thereby improving the clamping work efficiency and reducing labor intensity.

Description

A tool for turning eccentric shaft parts

technical field

The utility model relates to the lathe fixture technology, in particular to a tool for turning eccentric shaft parts.

Background technique

The eccentric shaft is a component that requires high precision in forklifts. The traditional processing method uses a four-jaw chuck to clamp, and the turning method of independently fine-tuning the jaws makes the center of the workpiece deviate from the center of the chuck, thereby realizing the turning of the eccentric shaft. This method has the disadvantages of difficult adjustment, low efficiency, poor interchangeability and difficulty in ensuring accuracy.

Utility model content

The main purpose of the utility model is to provide a tool for turning eccentric shaft parts in order to solve the above problems.

A tool for turning eccentric shaft parts, comprising a clamping plate 1 and a three-jaw chuck 2 of a lathe, the three-jaw chuck 2 is provided with three jaws 21 that are equally divided and automatically centered, the The clamping disc 1 is clamped in the center of the jaw 21. The clamping disc 1 is a section of cylinder, and the cylinder is provided with a positioning inner hole 11 eccentrically with the outer circle of the cylinder along the axis direction, and the positioning inner hole 11 is provided with an opening groove through the outer circle in the radial direction 12. There are two square grooves on the outer circle of the clamping disc 1, the two square grooves are respectively the first square groove 13 and the second square groove 14, and the two square grooves are connected with the positioning inner hole 11 Axes are parallel. The eccentric distance between the positioning inner hole 11 and the outer circle of the clamping disc 1 is e. When in use, the outer circle of the workpiece that needs to be turned into an eccentric e is inserted into the positioning inner hole 11, and when the three-jaw chuck 2 is tightened, the three jaws 21 clamp the outer circle of the clamping disc 1, the first square groove 13 and the second Elastic deformation occurs at the two square grooves 14 so that the clamping disc 1 clamps the workpiece centrally.

Further defined technical solutions are as follows:

The end face of the clamping disc 1 is provided with an outer circle center 15 and a positioning inner hole center 16, the distance between the outer circle center 15 and the positioning inner hole center 16 is the eccentricity e, and the outer circle center 15 and the positioning inner hole center The extension line of the connection line of 16 passes through the center of the opening groove 12, and the extension line of the connection line between the first square groove 13 and the second square groove 14 and the outer circle center 15 and the positioning inner hole center 16 is mirror-symmetrical. A positioning surface 3 is provided on the end surface of one end of the clamping disc 1 , and the positioning surface 3 is perpendicular to the positioning inner hole 11 . The width of the opening groove 12 is 1-4mm. The positioning inner hole 11 is in clearance fit with the outer circle of the workpiece, and the unilateral clearance is 0.025-0.035 mm.

The beneficial technical effect of the utility model is:

(1) Reliable clamping and positioning to ensure product quality: Through the ingenious design of the first square groove and the second square groove, the clamping plate has a certain degree of elasticity, and the positioning and clamping can be completed at one time to meet the product quality requirements.

(2) Improve work efficiency and reduce labor intensity: It is easy to operate, eliminating the trouble of repeatedly adjusting the eccentricity of the four-jaw chuck for each batch, thereby improving the clamping work efficiency and reducing labor intensity.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the eccentric structure of the end face of the utility model.

Fig. 3 is a schematic diagram of the positioning surface of the utility model.

Fig. 4 is a schematic view of the utility model in use.

Description of serial numbers in the above figure: clamping plate 1, positioning inner hole 11, opening slot 12, first square slot 13, second square slot 14, outer circle center 15, positioning inner hole center 16, three-jaw chuck 2, chuck Claw 21, positioning surface 3, eccentric shaft workpiece 4, eccentric distance e.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Example

A tool for turning eccentric shaft parts, comprising a clamping plate 1 and a three-jaw chuck 2 of a lathe, the three-jaw chuck 2 is provided with three jaws 21 that are equally divided and automatically centered, the The clamping disc 1 is clamped in the center of the jaw 21.

Referring to Figures 1 and 2, the clamping disc 1 is a section of cylinder, and the cylinder is provided with a positioning inner hole 11 eccentrically with the outer circle of the cylinder along the axial direction, and the positioning inner hole 11 is provided with a An open groove 12 runs through the outer circle, and the width of the open groove 12 is 3 mm. The outer circle of the clamping disc 1 is provided with two square grooves, the two square grooves are respectively the first square groove 13 and the second square groove 14, and the two square grooves are aligned with the axis of the positioning inner hole 11. parallel. The eccentric distance between the positioning inner hole 11 and the outer circle of the clamping disc 1 is e. The positioning inner hole 11 is in clearance fit with the outer circle of the workpiece, and the unilateral clearance is 0.025 mm.

Referring to FIG. 3 , a positioning surface 3 is provided on the end surface of one end of the clamping disc 1 , and the positioning surface 3 is perpendicular to the positioning inner hole 11 .

Referring to Figure 4, the outer circle of the eccentric shaft workpiece 4 that needs to be turned into an eccentric e is inserted into the positioning inner hole 11, the positioning surface 3 fits the end positioning surfaces of the three jaws, tighten the three-jaw chuck 2, or lightly step on the lathe The clamping switch of the hydraulic three-jaw chuck 2, at this time, the three jaws 21 are in contact with the outer circle of the clamping disc 1, and the three jaws 21 quickly clamp the outer circle of the clamping disc 1, the first square groove 13 and the second Elastic deformation occurs at the two square grooves 14 so that the clamping disk 1 clamps the workpiece in the center and starts turning.

The utility model is especially suitable for turning and processing eccentric shaft parts in batches. According to the eccentricity e of each batch of eccentric shaft parts, the matching clamping disk 1 is manufactured.

The above content is not intended to limit any form to the structure and shape of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims (5)

1. A tooling for turning eccentric shaft parts, comprising a clamping disc (1) and a three-jaw chuck (2) of a lathe, the three-jaw chuck (2) is provided with an evenly divided and automatically centered The clamping disc (1) is clamped at the center of the jaws (21), and it is characterized in that: the clamping disc (1) is a section of cylinder, and the cylinder is along the axis The direction is provided with a positioning inner hole (11) that is eccentric to the outer circle of the cylinder, and the positioning inner hole (11) is provided with an opening groove (12) that runs through the outer circle in the radial direction, and the clamping disc (1) There are two square grooves on the outer circle, the two square grooves are the first square groove (13) and the second square groove (14), and the two square grooves are parallel to the axis of the positioning inner hole (11) ; The eccentric distance between the positioning inner hole (11) and the outer circle of the clamping disc (1) is e; When in use, the outer circle of the workpiece that needs to be turned into an eccentric e is inserted into the positioning inner hole (11), and when the three-jaw chuck (2) is tightened, the three jaws (21) clamp the outer circle of the clamping disc (1) , elastic deformation occurs at the first square groove (13) and the second square groove (14), so that the clamping disc (1) clamps the workpiece centrally. 2. A tool for turning eccentric shaft parts according to claim 1, characterized in that: the end surface of the clamping disc (1) is provided with an outer circle center (15) and a positioning inner hole center ( 16), the distance between the center of the outer circle (15) and the center of the positioning inner hole (16) is the eccentricity e, and the extension line of the line connecting the center of the outer circle (15) and the center of the positioning inner hole (16) passes through the open slot In the center of (12), the first square groove (13) and the second square groove (14) are mirror-symmetrical to the extended line of the connecting line of the outer circle center (15) and the positioning inner hole center (16). 3. A tool for turning eccentric shaft parts according to claim 1, characterized in that: a positioning surface (3) is provided on the end surface of one end of the clamping disc (1), and the positioning surface ( 3) Perpendicular to the positioning inner hole (11). 4. A tool for turning eccentric shaft parts according to claim 1, characterized in that the width of the opening groove (12) is 1-4 mm. 5. A tooling for turning eccentric shaft parts according to claim 1, characterized in that: the positioning inner hole (11) is in clearance fit with the outer circle of the workpiece, and the unilateral clearance is 0.025- 0.035mm.