Quick positioning clamp for machining

Abstract

The utility model discloses a quick positioning fixture for machining, which comprises an upper disc and a lower disc, a side wall is connected between the lower disc and the upper disc, the upper disc is rotatably connected with a driving gear arranged between the upper disc and the lower disc, and the lower disc is rotatably connected with a driving gear arranged between the upper disc and the lower disc. A plurality of clamping shafts rotationally connected to the upper disc are distributed on the periphery of the driving gear, a driven gear meshed with the driving gear is arranged at one end of each clamping shaft, a bidirectional clamping block is arranged at the other end of each clamping shaft and arranged above the upper disc, and one end of the driving gear is connected with a movable arm extending in the radial direction. A first pin shaft is arranged on the movable arm, a second pin shaft is arranged on the lower disc, and a push rod air cylinder with one end hinged to the first pin shaft and the other end hinged to the second pin shaft is connected between the second pin shaft and the first pin shaft. The positioning clamp has the advantages of being high in positioning and clamping speed and positioning precision, complete in overall function and high in practicability.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and more specifically, it relates to a quick positioning fixture for machining. Background Technology

[0002] When clamping rotary workpieces, high accuracy of the central axis position is required. Frequent changes to the positioning fixture necessitate secondary alignment, resulting in slow clamping speed and poor overall performance. Therefore, this invention proposes a rapid positioning fixture for machining. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a fast positioning fixture for machining, which has the characteristics of fast positioning and clamping speed and high positioning accuracy.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: The utility model relates to a quick positioning fixture for machining, comprising an upper plate and a lower plate, with a side circumference connecting the lower plate and the upper plate. A drive gear is rotatably connected to the upper plate and disposed between the upper plate and the lower plate. Several clamping shafts are rotatably connected to the upper plate around the drive gear. One end of the clamping shaft is provided with a driven gear that meshes with the drive gear, and the other end is provided with a bidirectional clamping block, which is disposed above the upper plate. One end of the drive gear is connected to a movable arm that extends radially. A first pin is provided on the movable arm, and a second pin is provided on the lower plate. A push rod cylinder with one end hinged to the first pin and the other end hinged to the second pin is connected between the second pin and the first pin.

[0005] The present invention is further configured such that: the bidirectional clamping block includes a clamping block body, one end of the clamping block body is provided with a cylindrical outer clamping block, and the other end is provided with a cylindrical inner clamping block, the axes of the inner clamping block and the outer clamping block are both parallel to the axis of the clamping shaft.

[0006] The present invention is further configured such that the included angle between two adjacent clamping shafts is equal.

[0007] The present invention is further configured such that the number of clamping shafts is four, six, eight or twelve.

[0008] The present invention is further configured such that a pressure sensor is connected in series on the telescopic rod of the push rod cylinder.

[0009] In summary, this utility model has the following beneficial effects:

[0010] 1. It can be used to clamp not only hollow rotating pipe fittings, but also solid rotating workpieces, making it highly adaptable and flexible in clamping.

[0011] 2. It can be used to clamp workpieces within a set diameter range.

[0012] 3. Since the axis position of the pre-positioned fixture remains unchanged, there is no need for secondary alignment, resulting in fast positioning and clamping speed and high positioning accuracy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0014] Figure 2 This is a top view of the structure of this utility model;

[0015] Figure 3 This is a partial structural schematic diagram of the present invention;

[0016] Figure 4 This is a schematic diagram illustrating the structure of the bidirectional clamping block in this utility model. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0018] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0019] Example 1

[0020] See Figures 1 to 4 As shown, the quick positioning fixture for machining involved in this embodiment includes an upper plate 1 and a lower plate 2. A side circumference 3 is connected between the lower plate 2 and the upper plate 1. A drive gear 4 is rotatably connected to the upper plate 1 and disposed between the upper plate and the lower plate. A plurality of clamping shafts 5 are rotatably connected to the upper plate on the outer periphery of the drive gear 4. One end of the clamping shaft 5 is provided with a driven gear 6 that meshes with the drive gear, and the other end is provided with a bidirectional clamping block 7. The bidirectional clamping block 7 is disposed above the upper plate 1. One end of the drive gear 4 is connected to a movable arm 8 that extends radially. A first pin 9 is provided on the movable arm 8. A second pin 10 is provided on the lower plate 2. A push rod cylinder 11 with one end hinged to the first pin 9 and the other end hinged to the second pin 10 is connected between the second pin 10 and the first pin 9.

[0021] Furthermore, the bidirectional clamping block 7 includes a clamping block body 71, one end of which is provided with a cylindrical outer clamping block 72 and the other end is provided with a cylindrical inner clamping block 73. The axes of the inner clamping block 73 and the outer clamping block 72 are both parallel to the axis of the clamping shaft 5.

[0022] Furthermore, the included angle between two adjacent clamping shafts 5 is equal.

[0023] Furthermore, the number of clamping shafts 5 is four, six, eight, or twelve.

[0024] In this embodiment, when it is necessary to clamp and position a rotating pipe fitting, the pipe fitting is placed on all the bidirectional clamping blocks 7, and then the push rod cylinder 11 is operated to extend it. Through the mechanism transmission, the clamping shaft 5 carries the bidirectional clamping blocks 7 to rotate and laterally abut against the inner wall of the pipe fitting to achieve the function of rapid positioning. When it is necessary to clamp and position a solid rotating part, the workpiece is placed in the center of all the bidirectional clamping blocks 7, and then the push rod cylinder 11 is operated to extend it. Through the mechanism transmission, the clamping shaft 5 carries the bidirectional clamping blocks 7 to rotate and laterally abut against the outer wall of the workpiece to achieve the function of rapid positioning.

[0025] Example 2

[0026] See Figures 1 to 4 As shown, the quick positioning fixture for machining involved in this embodiment is further configured, based on embodiment 1, with a pressure sensor 12 connected in series on the telescopic rod of the push rod cylinder 11.

[0027] In this embodiment, the pressure sensor 12 is used to detect the feedback pressure value. When the pressure value reaches the set value, the push rod cylinder 11 will no longer extend.

[0028] The present invention relates to a quick positioning fixture for machining. This positioning fixture can be adapted to clamp not only hollow rotating pipes, but also solid rotating workpieces, making it highly adaptable and flexible in clamping. It can also be adapted to clamp workpieces within a set diameter range. Furthermore, since the axial position of the pre-positioned fixture remains unchanged, there is no need for secondary alignment. The positioning and clamping speed is fast, the positioning accuracy is high, the overall function is complete, and the practicality is strong.

[0029] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0030] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A quick positioning fixture for machining, comprising an upper plate and a lower plate, wherein a side panel is connected between the lower plate and the upper plate, characterized in that: A drive gear is rotatably connected to the upper disc and disposed between the upper and lower discs. Several clamping shafts are rotatably connected to the upper disc around the outer periphery of the drive gear. One end of the clamping shaft is provided with a driven gear that meshes with the drive gear, and the other end is provided with a bidirectional clamping block. The bidirectional clamping block is disposed above the upper disc. One end of the drive gear is connected to a movable arm that extends radially. A first pin is provided on the movable arm. A second pin is provided on the lower disc. A push rod cylinder with one end hinged to the first pin and the other end hinged to the second pin is connected between the second pin and the first pin.

2. The quick positioning fixture for machining according to claim 1, characterized in that: The bidirectional clamping block includes a clamping block body, one end of which is provided with a cylindrical outer clamping block and the other end of which is provided with a cylindrical inner clamping block. The axes of the inner clamping block and the outer clamping block are both parallel to the axis of the clamping shaft.

3. The quick positioning fixture for machining according to claim 1 or 2, characterized in that: The included angle between any two adjacent clamping shafts is equal.

4. The quick positioning fixture for machining according to claim 3, characterized in that: The number of clamping shafts is four, six, eight, or twelve.

5. The quick positioning fixture for machining according to claim 1, characterized in that: A pressure sensor is connected in series on the telescopic rod of the push rod cylinder.

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