CN216730738U

CN216730738U - Workpiece clamping device

Info

Publication number: CN216730738U
Application number: CN202220207963.9U
Authority: CN
Inventors: 黎梅; 任光华
Original assignee: Chongqing Xingji Gear Co ltd
Current assignee: Chongqing Xingji Gear Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-06-14
Anticipated expiration: 2032-01-25

Abstract

The utility model belongs to the technical field of machining clamps, and particularly discloses a workpiece clamping device which comprises a clamp body arranged on a machine tool, wherein a fixing column of a circular truncated cone structure is arranged on the clamp body, a shaft hole penetrating through the center of the fixing column is formed in the clamp body, and a pull rod is arranged in the shaft hole; an expansion sleeve for expanding an inner hole of the oil pump gear is sleeved on the part, located outside the shaft hole, of the pull rod, and a part of the expansion sleeve is sleeved outside the fixed column; and a base plate which is tightly abutted against the end face of the oil pump gear is arranged outside the fixed column on the clamp body. Compared with the prior art, the clamping device can simply and quickly clamp and fix the oil pump gear, and has stronger stability after clamping.

Description

Workpiece clamping device

Technical Field

The utility model belongs to the technical field of machining clamps, and particularly discloses a workpiece clamping device.

Background

The oil pump gear is applied to the oil pump, because carry or the supplementary liquid of carrying in the oil pump, because overall structure submerges in the oil pump, the precision requirement of oil pump gear is higher, not only to the precision of gear, also has certain precision requirement to the dimensional accuracy of its end face structure. Some oil pump gears have smaller axial size, and parts called as the oil pump gears in the industry are too thin, and during machining, an outer circle is clamped and attached to an end face, and the other end face is machined. Because the clamping part is less during excircle clamping, the oil pump gear is easy to be out of shape after clamping, and the axial is easy to deviate from the clamping tool, leads to the oil pump gear in the course of working, and the processing facing is beated unstably, and then can't ensure the precision of processing the terminal surface. In addition, as the number of the clamping parts is small, in order to ensure the stability of clamping, the clamping force is generally increased, and the outer circle of the oil pump gear is easily damaged.

Disclosure of Invention

The utility model aims to provide a workpiece clamping device to solve the problem of unstable clamping during oil pump gear end face machining.

In order to achieve the purpose, the basic scheme of the utility model is as follows: a workpiece clamping device comprises a clamp body arranged on a machine tool, wherein a fixing column of a circular truncated cone structure is arranged on the clamp body, a shaft hole penetrating through the center of the fixing column is formed in the clamp body, and a pull rod is arranged in the shaft hole; an expansion sleeve for expanding an inner hole of the oil pump gear is sleeved on the part, located outside the shaft hole, of the pull rod, and a part of the expansion sleeve is sleeved outside the fixed column; and a base plate which is tightly abutted against the end face of the oil pump gear is arranged outside the fixed column on the clamp body.

The working principle of the basic scheme is as follows: when the end face of the oil pump gear is machined, the oil pump gear sleeve is only arranged on the expansion sleeve, the end face, which does not need to be machined, of the oil pump gear is abutted against the backing plate, and the end face, which needs to be machined, of the oil pump gear can be machined.

The beneficial effect of this basic scheme lies in:

1. the oil pump gear is clamped and fixed in a manner of tensioning the inner hole of the oil pump gear, so that the oil pump gear can be clamped stably, and the machining precision of the oil pump gear can be ensured during machining of the end face of the oil pump gear.

2. When this clamping device carries out the centre gripping to the oil pump, advance need with oil pump gear sleeve extremely on the cover that rises, whole operation process is convenient, laborsaving, the use of this clamping device of being convenient for.

3. Use this clamping device to carry out the centre gripping to the oil pump, the tight effect that rises through the cover that rises carries out tight fixed to rising to the gear hole, every cover that rises can fix the oil pump gear of multiple size, if the size phase difference is great, can also change the cover size that rises in order to satisfy the fixed demand of oil pump gear centre gripping for this clamping device suitability is stronger.

4. After the clamping device clamps the oil pump, the end face which does not need to be machined is abutted by the backing plate, so that the end face which needs to be machined is machined conveniently, the stability of the machining process is good, and the machining precision is high.

Compared with the prior art, the clamping device can simply and quickly clamp and fix the oil pump gear, and has stronger stability after clamping.

Further, a stepped shaft connected with the fixing column is arranged on the clamp body, and the base plate is sleeved on the stepped shaft and fixed with the clamp body through bolts.

Has the advantages that: the stepped shaft facilitates the fixing and adjustment of the backing plate.

Furthermore, a counter bore is formed in the backing plate, and the bolt is connected with the clamp body through the counter bore.

Has the advantages that: the arrangement of the counter bore facilitates the hiding of the bolt into the backing plate, and the interference of the bolt for fixing the backing plate on the oil pump gear is avoided after the oil pump gear is clamped.

Further, the one end that the cover that rises was kept away from to the anchor clamps body is equipped with the shoulder hole, be equipped with in the shoulder hole and connect the pole fixed with the pull rod of lathe, the one end that the cover that rises is kept away from to the anchor clamps body is connected with the body that is used for with the lathe interface.

Has the advantages that: the arrangement of the connecting rod and the body is convenient for stably installing the clamp body on the machine tool.

Furthermore, the clamp body is provided with a positioning hole communicated with the shaft hole along the circumferential direction of the shaft hole, and a screw for fixing the pull rod is arranged in the positioning hole.

Has the advantages that: the screw can support the pull rod through the locating hole tightly fixedly, prevents that the pull rod from taking place to rotate, rocking etc. in the use, influences the processing of oil pump gear.

Furthermore, a fixing section is arranged at the position, corresponding to the positioning hole, of the pull rod, and a notch matched with the screw is formed in the circumferential direction of the fixing section.

Has the advantages that: the pull rod is provided with a fixing section at the position corresponding to the positioning hole, and the fixing section is circumferentially provided with a notch matched with the screw.

Furthermore, the setting of fixed section and notch can cooperate the screw to the tight effect of support of pull rod, further prevents that the pull rod is rotatory.

Has the advantages that: the pull rod is provided with a limiting part for limiting the position of the expansion sleeve, and one end of the pull rod, which is far away from the clamp body, is provided with a nut.

Furthermore, the limiting part and the nut are convenient for limiting the position of the expansion sleeve, and the expansion sleeve is convenient to replace according to the size difference of the inner hole of the oil pump gear.

Drawings

Fig. 1 is a schematic view of a workpiece clamping device according to an embodiment of the utility model.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the oil pump gear clamp comprises a clamp body 10, a fixing column 11, a stepped shaft 12, a bolt 13, a positioning hole 14, a screw 15, a stepped hole 16, a shaft hole 17, a pull rod 20, a limiting part 21, a fixing section 22, a notch 23, a nut 24, a backing plate 25, a counter bore 26, an expansion sleeve 27, a connecting rod 30, a body 31 and an oil pump gear 40.

As shown in fig. 1, a workpiece clamping device comprises a clamp body 10, wherein a fixing column 11 of a circular truncated cone structure is arranged on the clamp body 10, one end of the fixing column 11 with a small diameter is far away from the clamp body 10, a shaft hole 17 penetrating through the center of the fixing column 11 is arranged in the clamp body 10, and a pull rod 20 is installed on the shaft hole 17. A positioning hole 14 communicated with the shaft hole 17 is formed in the clamp body 10 along the circumferential direction of the shaft hole 17, and a screw 15 for fixing the pull rod 20 is arranged in the positioning hole 14; the pull rod 20 is provided with a fixing section 22 corresponding to the positioning hole 14, a notch 23 matched with the screw 15 is formed in the circumferential direction of the fixing section 22, the end portion of the screw 15 extends into the notch 23 to fix the position of the pull rod 20 and prevent the pull rod 20 from rotating, and the screw 15 can pull the pull rod 20 along the shaft hole 17 after being taken out.

An expansion sleeve 27 for expanding an inner hole of the oil pump gear 40 is sleeved on the part of the pull rod 20, which is positioned outside the shaft hole 17, and a part of the expansion sleeve is sleeved outside the fixed column 11; the fixture body 10 is provided with a stepped shaft 12 connected with the fixed column 11, a backing plate 25 used for abutting against the end face of the oil pump gear 40 is sleeved outside the stepped shaft 12, a counter bore 26 is arranged on the backing plate 25, and the bolt 13 penetrates through the counter bore 26 to fixedly connect the backing plate 25 with the fixture body 10. The pull rod 20 is provided with a limiting part 21 for limiting the position of the expansion sleeve 27, and one end of the pull rod 20 far away from the clamp body 10 is provided with a nut 24.

A stepped hole 16 is formed in one end, away from the expansion sleeve 27, of the clamp body, a connecting rod 30 fixed with a pull rod 20 of a machine tool is arranged in the stepped hole 16, and a body 31 used for being connected with a machine tool interface is connected to one end, away from the expansion sleeve 27, of the clamp body; the clamping device can be stably arranged on a machine tool through the extension rod 30 and the body 31.

The specific implementation process is as follows: before the clamping device is used, the pull rod 20 can extend into the shaft hole 17, and the tip of the screw 15 is tightly pressed against the notch 23 by screwing the screw 15, so that the pull rod 20 is fixed. The nut 24 is disassembled, the expansion sleeve 27 corresponding to the size of the inner hole of the oil pump gear 40 is sleeved on the pull rod 20 and sleeved on the fixed column 11, the limiting part 21 can limit the expansion sleeve 27, and the nut 24 is screwed down to fix the position of the expansion sleeve 27. When the clamping device is used, the oil pump gear 40 is sleeved on the expansion sleeve 27, the end face of the oil pump gear 40 which does not need to be machined is abutted against the backing plate 25, the oil pump gear 40 can be clamped and fixed, and the end face of the oil pump gear 40 which needs to be machined can be machined.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A workpiece holding device, characterized in that: the clamp comprises a clamp body used for being installed on a machine tool, wherein a fixing column of a circular truncated cone structure is arranged on the clamp body, a shaft hole penetrating through the center of the fixing column is formed in the clamp body, and a pull rod is installed in the shaft hole; an expansion sleeve for expanding an inner hole of the oil pump gear is sleeved on the part, located outside the shaft hole, of the pull rod, and a part of the expansion sleeve is sleeved outside the fixed column; and a base plate which is tightly abutted against the end face of the oil pump gear is arranged outside the fixed column on the clamp body.

2. The workpiece clamping device as recited in claim 1, wherein the fixture body is provided with a stepped shaft connected with the fixing column, and the backing plate is sleeved on the stepped shaft and fixed with the fixture body through a bolt.

3. The workpiece clamping device as recited in claim 2, wherein the backing plate is provided with a counter bore, and the bolt is connected with the clamp body through the counter bore.

4. The workpiece clamping device as claimed in claim 3, wherein a stepped hole is formed in one end of the clamp body, which is far away from the expansion sleeve, a connecting rod fixed with a pull rod of the machine tool is arranged in the stepped hole, and a body used for being connected with the machine tool is connected to one end of the clamp body, which is far away from the expansion sleeve.

5. The workpiece clamping device of claim 4, wherein the clamp body is provided with a positioning hole communicated with the shaft hole along the circumferential direction of the shaft hole, and a screw for fixing the pull rod is arranged in the positioning hole.

6. The workpiece clamping device as recited in claim 5, wherein a fixing section is provided at a position of the pull rod corresponding to the positioning hole, and a notch matched with the screw is provided at the circumference of the fixing section.

7. The workpiece clamping device as recited in claim 6, wherein the pull rod is provided with a limiting portion for limiting the position of the expansion sleeve, and a nut is arranged at one end of the pull rod, which is far away from the clamp body.