CN218934962U

CN218934962U - Telescopic hydraulic clamp positioning pin with air tightness detection function

Info

Publication number: CN218934962U
Application number: CN202320019867.6U
Authority: CN
Inventors: 谢升; 李逸康; 卿轶炜
Original assignee: GUANGDONG TAYO MOTORCYCLE TECHNOLOGY CO LTD
Current assignee: GUANGDONG TAYO MOTORCYCLE TECHNOLOGY CO LTD
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-04-28
Anticipated expiration: 2033-01-05

Abstract

The purpose of the utility model is realized in the following way: a telescopic hydraulic clamp positioning pin with air tightness detection comprises an oil cylinder with an air tightness detection device, a positioning pin and a pin sleeve; the locating pin lateral wall is equipped with the keyway, and the locating pin bottom is equipped with the spring, and the blind hole has been seted up to the round pin cover upper end, and the lower extreme is screw structure, and the inside piston rod that is equipped with of hydro-cylinder with gas tightness detection device, screw hole has been seted up to the piston rod upper end, and inlet port, oil outlet and inlet port have been seted up to hydro-cylinder bottom with gas tightness detection device, and the outside is equipped with oil plug and exhaust hole.

Description

Telescopic hydraulic clamp positioning pin with air tightness detection function

Technical Field

The utility model relates to a hydraulic clamp positioning pin, in particular to a telescopic hydraulic clamp positioning pin with air tightness detection function.

Background

The hydraulic clamp is widely applied to scenes such as numerical control machine tools, machining centers and automatic production lines, is a basis for realizing efficient and batch machining, and plays an important role in improving production quality, reducing labor intensity, improving working efficiency and the like. The hydraulic clamp mainly comprises a positioning reference, a clamping device, a clamp body and other element devices. The positioning reference is a point, a line and a plane for determining the geometric element relation of the production object, and is used for positioning the workpiece in processing. In the actual machining process, the accuracy of positioning directly influences the accuracy and dimensional stability of machining characteristics. The positioning pin serves as a main component for positioning, and limits the degree of freedom of the component. At present, most of positioning pins on the hydraulic clamp are fixed positioning pins with the degree of freedom of 0, namely fixed positioning pins usually take holes on processed parts as references, and the positioning device well ensures accurate positioning, so that the positioning device is widely applied. However, when the pilot hole in the part is also a machined feature, the machining tool may interfere with the pilot pin. The currently adopted method is to transfer the processing characteristic of locating the hole to other stations for processing without locating the hole. The method avoids interference between the cutter and the locating pin, but needs to design a new locating reference, transfer a station and re-clamp. Therefore, the processing time is prolonged, the manufacturing cost is increased, the positioning precision is more likely to be reduced, and the dimensional stability of the part is affected. In order to solve the problem, the utility model discloses a telescopic hydraulic clamp positioning pin with air tightness detection.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art, and designs a telescopic hydraulic clamp positioning pin with air tightness detection. When the hole for positioning on the part also needs to be processed, the positioning reference is not required to be changed, the station is switched, the interference generated by the positioning pin and the cutter during the processing of the hole is eliminated, and the air tightness detection device is designed on the positioning pin part. Therefore, the dimensional accuracy and stability of the parts are improved, and the production cost is reduced.

In order to achieve the above purpose, the present utility model adopts the following specific technical scheme:

a telescopic hydraulic clamp positioning pin with air tightness detection comprises an oil cylinder with an air tightness detection device, a positioning pin and a pin sleeve; the locating pin lateral wall is equipped with the keyway, and the locating pin bottom is equipped with the spring, and the blind hole has been seted up to the round pin cover upper end, and the lower extreme is screw structure, and cylinder (1) inside with gas tightness detection device is equipped with the piston rod, and threaded hole has been seted up to the piston rod upper end, and inlet port, oil outlet and inlet port have been seted up to cylinder (1) bottom with gas tightness detection device, and the outside is equipped with oil plug and exhaust hole.

Furthermore, the locating pin is connected with the pin sleeve through the spring and the bolt to form an elastic pin structure, the pin sleeve is supported by the pin seat, and the lower end of the pin sleeve is of a threaded structure and is connected with the piston rod.

Further, a threaded hole is formed in the upper end of the piston rod, the piston rod is connected with the piston rod through threads, and the piston rod is in an oil cylinder with an air tightness detection device and performs linear reciprocating motion through pressure provided by a hydraulic clamp.

Further, an oil cylinder with an air tightness detection device is fixed on the hydraulic clamp through an oil cylinder seat, an oil inlet hole and an oil outlet hole are connected with an oil way of the hydraulic clamp and are sealed through a sealing ring, and an air inlet hole is connected with an air passage of the hydraulic clamp for air tightness detection.

Further, the air inlet hole is connected with the air passage of the hydraulic clamp, is sealed through the sealing ring, and is subjected to airtight detection through the internal and external pressure difference of the oil cylinder with the airtight detection device.

The utility model has the following remarkable characteristics and beneficial effects:

1) Simple structure, the practicality is strong. Compared with the traditional fixed positioning pin, the utility model only adds an oil cylinder device, so that the positioning pin is changed into a telescopic positioning pin which moves linearly and reciprocally along with the oil cylinder piston rod. When the locating hole on the part needs to be processed and the interference exists between the locating pin and the cutter, the oil cylinder of the telescopic locating pin hydraulic clamp starts to work, the piston rod is retracted into the oil cylinder, the shaft sleeve and the locating pin are retracted by a distance, the interference between the locating pin and the cutter is eliminated, the locating hole is easily processed, a station is not required to be switched, and the dimensional accuracy and the stability of the part are ensured.

2) A special air tightness detection device. By arranging the air inlet hole and the airtight hole at the oil cylinder to detect whether the positioning pin is contracted in place, the positioning pin is processed under the condition of ensuring safety, and compared with other positioning pins without the airtight detection function, the positioning pin can avoid potential safety hazards which possibly occur, and is stable and reliable to use.

Drawings

The utility model will be further described with reference to the drawings and detailed description.

FIG. 1 is a schematic cross-sectional view of the present utility model.

FIG. 2 is a schematic diagram of a model clutch driving disc of an embodiment.

Fig. 3 is a schematic structural view of an oil cylinder with an air tightness detection device.

Fig. 4 is an exploded view of the air tightness detecting device.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 2, the schematic view of a clutch driving disc of a certain type has a through hole A, B, C to be machined, but at the same time, a certain hole in A, B, C is required to be used as a positioning hole, which is conventionally: and (3) taking the hole D as a positioning hole, selecting one hole of the A, B, C three holes as a positioning hole (assumed to be a hole A), then after two holes except the positioning hole A are machined, loosening the clamp, rotating the part by 120 degrees around the center line of the hole D, taking the hole B as the positioning hole, and machining the hole A. The utility model changes the traditional hydraulic clamp into a telescopic locating pin hydraulic clamp with air tightness detection, and any one of holes A, B, C is used as a locating hole to be located by a telescopic locating pin with an air tightness detection device. Before the parts are installed, the positioning pins are in an extending state, after the parts are correctly installed and clamped, the hydraulic station is started to send hydraulic oil into the oil cylinder (1) of the air tightness detection device, and the positioning pins (6) are pulled back by the piston rod (2). At the moment, the holes A, B, C can be directly machined, the locating pins do not interfere with the cutter any more, and the clamping is not needed again after the two holes are machined. The method well avoids the dimension error of the clutch driving disc caused by the secondary clamping and the replacement of the positioning reference 0, reduces the clamping steps and manual operation, and ensures the manufacturing precision of parts.

Further, when the processing environment is severe and many chips or fine particles exist, the impurities may jam the telescopic locating pin and the shaft sleeve, if the locating pin is jammed and cannot retract in time, the locating pin will interfere with a cutter for processing a hole in normal processing, and adverse effects such as cutter fracture, clamp damage, part rejection and the like are likely to be caused. The added air tightness detection device formed by the air inlet hole (9) and the air sealing hole (8) well avoids the problem. When the shaft sleeve is clamped and cannot retract, the air tightness detection device detects that the pressure value of air pressure is lower than that of normal conditions, the numerical control system receives feedback that the air pressure is low and can give an alarm immediately, the working is stopped, and the machine can normally operate after fault removal.

Finally, it should be noted that: the above embodiments are only for explaining the technical solution of the present utility model, and are not limited thereto. All other corresponding changes, equivalents, improvements and modifications according to the technical idea of the utility model are intended to be included in the scope of the claims.

Claims

1. The telescopic hydraulic clamp positioning pin with the air tightness detection function is characterized by comprising an oil cylinder (1) with an air tightness detection device, a positioning pin (6) and a pin sleeve (7); the locating pin (6) lateral wall is equipped with the keyway, and locating pin (6) bottom is equipped with spring (5), and blind hole has been seted up to round pin cover (7) upper end, and the lower extreme is screw thread structure, and cylinder (1) inside with gas tightness detection device is equipped with piston rod (2), and threaded hole has been seted up to piston rod (2) upper end, and inlet port, oil outlet and inlet port have been seted up to cylinder (1) bottom with gas tightness detection device, and the outside is equipped with oil plug and exhaust hole.

2. The retractable hydraulic clamp locating pin with air tightness detection according to claim 1, wherein: the locating pin (6) is connected with the pin sleeve (7) through the spring (5) and the bolt to form an elastic pin structure, the pin sleeve (7) is supported by the pin base (4), and the lower end of the pin sleeve (7) is of a threaded structure and is connected with the piston rod (2).

3. The telescopic hydraulic clamp positioning pin with the air tightness detection function according to claim 2 is characterized in that a threaded hole is formed in the upper end of a piston rod (2), the piston rod (2) is connected with the piston rod (2) through threads, and the piston rod (2) is in an oil cylinder (1) with the air tightness detection device and performs linear reciprocating motion through pressure provided by a hydraulic clamp.

4. A retractable hydraulic clamp locating pin with air tightness detection according to claim 3, wherein: an oil cylinder (1) with an air tightness detection device is fixed on a hydraulic clamp through an oil cylinder seat (3), an oil inlet hole (10) and an oil outlet hole (11) are connected with an oil way of the hydraulic clamp and are sealed through a sealing ring, and an air inlet hole (9) is connected with an air passage of the hydraulic clamp for air tightness detection.

5. The retractable hydraulic clamp locating pin with air tightness detection according to claim 4, wherein: the air inlet is connected with the air passage of the hydraulic clamp, is sealed by a sealing ring, and performs airtight detection by the internal and external pressure difference of an oil cylinder (1) with an airtight detection device.