Negative pressure positioning clamp

Abstract

The utility model discloses a negative pressure positioning clamp which comprises an upper plate and a lower plate, a side wall is connected between the lower plate and the upper plate, a negative pressure cavity is formed among the side wall, the upper plate and the lower plate, a negative pressure opening is formed in the side wall, a plurality of adsorption holes are formed in the upper plate, adsorption columns extending out of the hole openings are connected in the adsorption holes in a sliding mode, and step parts are arranged at the bottoms of the adsorption columns. An elastic piece is arranged between the step part and the lower plate, a first negative pressure channel extending in the axial direction and a second negative pressure channel extending in the radial direction are formed in the adsorption column, one end of the second negative pressure channel is connected with the first negative pressure channel, and a channel opening in the other end of the second negative pressure channel is formed in the side wall of the adsorption column; a channel opening in one end, which is not connected with the second negative pressure channel, of the first negative pressure channel is formed in the top wall of the adsorption column; when the upper end face of the adsorption column is flush with the upper end face of the upper plate, the second negative pressure channel communicates with the negative pressure cavity. The clamp has the advantages of being rapid in clamping and positioning, convenient to use, 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 negative pressure positioning fixture. Background Technology

[0002] Negative pressure positioning fixtures are adaptable to clamping workpieces with a smooth, unmachined surface, enabling rapid clamping. However, commercially available negative pressure positioning fixtures are numerous, cumbersome to manufacture, difficult to assemble, and generally ineffective. Therefore, this invention proposes a negative pressure positioning fixture. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a negative pressure positioning fixture, which has the characteristics of quick clamping and positioning and convenient use.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: This utility model relates to a negative pressure positioning fixture, comprising an upper plate and a lower plate. A side panel is connected between the lower plate and the upper plate, forming a negative pressure cavity between the side panel, the upper plate, and the lower plate. A negative pressure port is provided on the side panel. A plurality of adsorption holes are arranged on the upper plate. An adsorption column extending out of the adsorption hole is slidably connected within the adsorption hole. The bottom of the adsorption column is provided with a step portion that restricts upward movement. An elastic element is provided between the step portion and the lower plate, with one end abutting against the step portion and the other end abutting against the lower plate. A first negative pressure channel extending axially and a second negative pressure channel extending radially are provided on the adsorption column. One end of the second negative pressure channel is connected to the first negative pressure channel, and the other end of the channel opening is located on the side wall of the adsorption column. The end of the first negative pressure channel not connected to the second negative pressure channel is located on the top wall of the adsorption column. When the upper end face of the adsorption column is flush with the upper end face of the upper plate, the second negative pressure channel communicates with the negative pressure cavity.

[0005] The present invention is further provided with a sealing ring connected to the step portion between the step portion and the upper plate.

[0006] The present invention is further configured such that: a sealing groove is provided on the stepped portion, and the sealing ring is embedded in the sealing groove.

[0007] The present invention is further configured such that: a first positioning protrusion is provided at one end of the stepped portion facing the lower plate, a second positioning protrusion is provided at one end of the lower plate facing the upper plate, and the elastic element is a compression spring with one end sleeved on the first positioning protrusion and the other end sleeved on the second positioning protrusion.

[0008] The present invention is further configured such that the adsorption holes are arranged in a rectangular array on the upper plate.

[0009] In summary, the present invention has the following beneficial effects: the negative pressure positioning fixture involved in the present invention can achieve rapid adsorption and clamping, while having a small number of components, simple assembly, indirectly reducing manufacturing costs, and having complete overall functions and strong practicality. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a partial structural schematic diagram of the present invention. Detailed Implementation

[0012] 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.

[0013] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0014] Example 1

[0015] See Figure 1 and Figure 2 As shown, the negative pressure positioning fixture involved in this embodiment includes an upper plate 1 and a lower plate 2. A side panel 3 is connected between the lower plate 2 and the upper plate 1, and a negative pressure cavity 4 is formed between the side panel 3, the upper plate 1, and the lower plate 2. A negative pressure port 5 is provided on the side panel 3. A plurality of adsorption holes 6 are arranged in a rectangular array on the upper plate 1. Adsorption columns 7 extending out of the holes 6 are slidably connected in the adsorption holes 6. The bottom of the adsorption column 7 is provided with a step portion 8 that restricts its upward movement. A space is provided between the step portion 8 and the lower plate 2, with one end abutting against the step portion and the other end... The adsorption column 7 has an elastic member 9 that abuts against the lower plate. It is provided with a first negative pressure channel 10 extending axially and a second negative pressure channel 11 extending radially. One end of the second negative pressure channel 11 is connected to the first negative pressure channel 10, and the channel opening at the other end is opened on the side wall of the adsorption column 7. The channel opening at the end of the first negative pressure channel 10 that is not connected to the second negative pressure channel is opened on the top wall of the adsorption column. When the upper end surface of the adsorption column 7 is flush with the upper end surface of the upper plate 1, the second negative pressure channel 11 is connected to the negative pressure cavity 4.

[0016] In this embodiment, when a smooth, flat workpiece is pressed onto the adsorption column 7 with the protruding orifice, the adsorption column 7 and the stepped part 8 move downwards, and the elastic element 9 is compressed. When the upper end surface of the adsorption column 7 is flush with the upper end surface of the upper plate 1, the second negative pressure channel 11 is connected to the negative pressure chamber 4, and the upper negative pressure port of the first negative pressure channel 10 forms a negative pressure, adsorbing the workpiece for positioning.

[0017] Example 2

[0018] See Figure 1 and Figure 2 As shown, the negative pressure positioning fixture involved in this embodiment is further configured based on embodiment 1, wherein a sealing ring 12 connected to the step portion 8 is provided between the step portion 8 and the upper plate 1, and a sealing groove (not marked) is provided on the step portion 8, and the sealing ring 11 is embedded in the sealing groove.

[0019] In this embodiment, the sealing groove is combined with the sealing ring 12 to enhance the sealing effect, so that when the step part 8 is close to the upper plate 1, the connected second negative pressure channel 11 and negative pressure chamber 4 can be blocked.

[0020] Example 3

[0021] See Figure 1 and Figure 2 As shown, the negative pressure positioning fixture involved in this embodiment is further configured based on embodiments 1 and 2, wherein the step portion 8 is provided with a first positioning protrusion 13 at one end facing the lower plate, the lower plate 2 is provided with a second positioning protrusion 14 at one end facing the upper plate, and the elastic member 9 is a compression spring with one end sleeved on the first positioning protrusion and the other end sleeved on the second positioning protrusion.

[0022] In this embodiment, the first positioning protrusion 13 and the second positioning protrusion 14 are used to position the elastic member 9 during installation.

[0023] The negative pressure positioning fixture involved in this utility model can achieve rapid adsorption and clamping, while having a small number of components, simple assembly, indirectly reducing manufacturing costs, and having complete overall functions and strong practicality.

[0024] 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.

[0025] 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.

[0026] 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 negative pressure positioning fixture, comprising an upper plate and a lower plate, wherein a side panel is connected between the lower plate and the upper plate, and a negative pressure cavity is formed between the side panel, the upper plate, and the lower plate, wherein a negative pressure port is provided on the side panel, characterized in that: The upper plate is provided with a plurality of adsorption holes, and an adsorption column extending out of the hole is slidably connected in the adsorption hole. The bottom of the adsorption column is provided with a step portion that restricts upward movement. An elastic element is provided between the step portion and the lower plate, with one end abutting against the step portion and the other end abutting against the lower plate. The adsorption column is provided with a first negative pressure channel extending axially and a second negative pressure channel extending radially. One end of the second negative pressure channel is connected to the first negative pressure channel, and the channel opening at the other end is opened on the side wall of the adsorption column. The channel opening at the end of the first negative pressure channel that is not connected to the second negative pressure channel is opened on the top wall of the adsorption column. When the upper end surface of the adsorption column is flush with the upper end surface of the upper plate, the second negative pressure channel communicates with the negative pressure cavity.

2. The negative pressure positioning fixture according to claim 1, characterized in that: A sealing ring connected to the step is provided between the step portion and the upper plate.

3. The negative pressure positioning fixture according to claim 2, characterized in that: A sealing groove is provided on the stepped portion, and the sealing ring is embedded in the sealing groove.

4. The negative pressure positioning fixture according to any one of claims 1-3, characterized in that: The step portion has a first positioning protrusion at the end facing the lower plate, and the lower plate has a second positioning protrusion at the end facing the upper plate. The elastic element is a compression spring with one end fitted on the first positioning protrusion and the other end fitted on the second positioning protrusion.

5. The negative pressure positioning fixture according to claim 1, characterized in that: The adsorption pores are arranged in a rectangular array on the upper plate.

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