Screw fastening device for air cylinder cover of compressor

Abstract

The utility model relates to the technical field of compressor machining, in particular to a compressor cylinder cover screw fastening device which comprises a shell and a positioning frame, a cylinder is arranged at one end of the positioning frame, a fastening assembly used for extruding and fastening a screw is arranged at the other end of the positioning frame, and the fastening assembly comprises a fixing frame arranged at one end of the positioning frame. Four hole grooves are formed in the fixing frame, connecting rods are arranged in the four hole grooves, and sleeves are arranged at the other ends of the connecting rods; a plurality of cavities are formed in the inner wall of the hole groove, electromagnets are arranged on the inner walls of the multiple cavities, through grooves and air bins are arranged at one ends of the cavities, protruding blocks are arranged in the cavities, and magnetic plates and supporting rods are arranged at one ends of the protruding blocks. According to the utility model, a buffer space is provided when a screw is fastened, the screw is prevented from being damaged due to overlarge downward pressure, the pressure during fastening is detected in real time, sufficient fastening pressure is ensured, and the fastening stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor processing, in particular to a compressor cylinder cover screw fastening device. Background Art

[0002] A compressor is a driven fluid mechanical device that boosts low-pressure gas to high-pressure gas, and is widely used in various industrial and civilian applications. The cylinder head is a crucial component of the compressor, primarily used to seal the cylinder. Together with the piston top and cylinder block, it forms the compression chamber and houses various components, such as valves and valve springs.

[0003] However, in the current existing technology, when tightening the screws when connecting the cylinder head of the compressor, the downward pressure of the driving cylinder during tightening the screws is relatively large, which causes the threads to slip when the screws are pressed down, resulting in reduced stability of the screws and affecting the strength of the cylinder head installation. Utility Model Content

[0004] The purpose of the utility model is to provide a compressor cylinder head screw fastening device to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A compressor cylinder head screw fastening device comprises a housing and a positioning frame, wherein one end of the positioning frame is provided with a cylinder, and the other end is provided with a fastening assembly for squeezing and fastening the screws, wherein the fastening assembly comprises a fixing frame provided at one end of the positioning frame, wherein four holes are provided in the fixing frame, and connecting rods are provided in each of the four holes, and a sleeve is provided at the other end of the connecting rod;

[0007] The inner wall of the hole groove is provided with multiple cavities, and the inner walls of the multiple cavities are all provided with electromagnets. One end of the cavity is provided with a through groove and an air chamber, and a protrusion is provided inside the cavity. One end of the protrusion is provided with a magnetic plate and a support rod.

[0008] As a preferred solution of the present invention, the fixed frame is connected to the end of the positioning frame away from the cylinder by bolts, the cylinder angle corresponds to the fixed frame, and the fixed frame is equipped with four connecting heads close to the end of the cylinder and embedded in the hole grooves of the fixed frame.

[0009] As a preferred solution of the present invention, one end of the connecting rod is located in the hole groove and is slidably connected to the inner wall of the hole groove, and the other end is connected to the sleeve. The sleeve is hollow at the end away from the connecting rod and corresponds to the screw structure.

[0010] As a preferred solution of the present invention, multiple cavity arrays are distributed on the inner wall of the hole groove, and the through groove is connected to the air chamber at one end away from the cavity. The air chamber is loaded with high-pressure gas and is equipped with an air pressure sensor.

[0011] As a preferred solution of the present invention, one end of the protrusion is a conical structure, and the other end extends into the cavity and is slidably connected to the inner wall of the cavity. One end of the support rod is connected to the protrusion by a bolt, and the other end extends into the through groove and is connected to the piston.

[0012] As a preferred solution of the present invention, the electromagnet is embedded and connected to the inner wall of the cavity, and the electromagnet is magnetically connected to the magnetic plate at one end of the protrusion.

[0013] Compared with the prior art, the present invention has the following beneficial effects: in response to the problems raised in the background art, the present invention adopts a fastening assembly, which provides a buffer space when the sleeve presses down on the screw through the hole groove in the fixing frame. When the sleeve and the screw are engaged and pressed, the recoil force during the downward pressure causes the connecting rod to contract in the hole groove to provide a buffer, thereby preventing the screw from slipping due to excessive downward pressure;

[0014] At the same time, when the connecting rod contracts, the bulge on the chamber wall is squeezed to make it contract. When the bulge contracts, the gas in the through groove is pushed into the air chamber to increase the pressure in the air chamber. When the connecting rod contracts to a specified distance, the pressure in the air chamber reaches the set value, thereby detecting whether the downward pressure of the sleeve is sufficient to ensure the stability and tightening effect of the screw.

[0015] The utility model provides a buffer space when tightening the screw, thereby avoiding damage to the screw due to excessive downward pressure, and performs real-time detection of the pressure during tightening, thereby ensuring sufficient tightening pressure and improving the stability of tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a plan view of the fastening frame of the utility model;

[0017] Figure 2 This is the appearance structure diagram of the positioning frame of the utility model;

[0018] Figure 3 This is a cross-sectional view of the interior of the fixed frame of the utility model;

[0019] Figure 4 This is an enlarged view of part A of the utility model.

[0020] In the figure: 1. Shell; 2. Positioning frame; 201. Cylinder; 3. Fixing frame; 301. Hole groove; 4. Connecting rod; 401. Sleeve; 5. Cavity; 501. Electromagnet; 502. Through groove; 6. Air chamber; 7. Bump; 701. Magnetic plate; 702. Support rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Example

[0022] See also Figure 1-4 The utility model provides a technical solution: a compressor cylinder head screw fastening device, comprising a housing 1 and a positioning frame 2, wherein one end of the positioning frame 2 is provided with a cylinder 201, the positioning frame 2 can move within the housing 1, thereby driving the sleeve 401 at one end of the positioning frame 2 and the screw positioning sleeve on the cylinder head, and the other end is provided with a fastening component for squeezing and fastening the screw, the fastening component includes a fixing frame 3 provided at one end of the positioning frame 2, and four holes 301 are provided inside the fixing frame 3 for adjusting the sleeve 401 when the sleeve 401 contracts. The angle of the projection 7 is limited and positioned. A connecting rod 4 is provided inside the four hole grooves 301. The connecting rod 4 is used to connect the sleeve 401 and the fixed frame 3. The other end of the connecting rod 4 is provided with a sleeve 401. One end of the sleeve 401 is provided with a positioning hole corresponding to the structure of the screw, so that it can be clamped on the outside of the screw and connected with the screw. The inner wall of the hole groove 301 is provided with multiple cavities 5 for positioning the angle of the protrusion 7. The inner walls of the multiple cavities 5 are provided with electromagnets 501. The electromagnet 501 can generate magnetic poles to align with the magnetic plate 701 at one end of the protrusion 7. The magnetic repulsion pushes the protrusion 7 out of the cavity 5 to support and lock the connecting rod 4. When the electromagnet 501 pushes the protrusion 7 out of the support, the connecting rod 4 can be locked to prevent it from further contracting. A through groove 502 and an air chamber 6 are provided at one end of the cavity 5. The through groove 502 is communicated with the air chamber 6. The piston extending into the through groove 502 is supported by the air pressure of the high-pressure gas in the air chamber 6, thereby supporting the protrusion 7 in the normal state (the supporting force of the air pressure is limited. Therefore, when the sleeve 401 tightens the screw, the connecting rod 4 can be driven to contract by the reverse thrust, and When the connecting rod 4 contracts, it pushes the protrusion 7 to contract into the cavity 5 and pushes the gas in the through groove 502 into the air chamber 6, thereby further increasing the air pressure in the air chamber 6. The more the protrusion 7 contracts, the greater the pressure in the air chamber 6. When the sensor detects that the pressure in the air chamber 6 reaches the set value, the pressure of the edge sleeve 401 reaches the set value, and then sends a signal to the console and controls the positioning frame 2 to stop pressing down, and at the same time controls the electromagnet 501 to activate). A protrusion 7 is provided inside the cavity 5, and a magnetic plate 701 and a support rod 702 are provided at one end of the protrusion 7.

[0023] In this embodiment, all electrical components are controlled by conventional controllers.

[0024] For example, please refer to Figure 1-4The fixing frame 3 is connected to the end of the positioning frame 2 away from the cylinder 201 by a bolt. The angle of the cylinder 201 corresponds to the fixing frame 3. The fixing frame 3 is installed with four connectors at the end close to the cylinder 201 and embedded in the hole groove 301 of the fixing frame 3. One end of the connecting rod 4 is located in the hole groove 301 and is slidably connected to the inner wall of the hole groove 301. The other end is connected to the sleeve 401. The sleeve 401 is a hollow structure away from the connecting rod 4 and corresponds to the screw structure. A plurality of the cavities 5 are distributed in an array in the hole groove 301. The inner wall, the through groove 502 is connected to the air chamber 6 at one end away from the cavity 5. The air chamber 6 is loaded with high-pressure gas and is equipped with an air pressure sensor. One end of the protrusion 7 is a conical structure, and the other end extends into the cavity 5 and is slidingly connected to the inner wall of the cavity 5. One end of the support rod 702 is connected to the protrusion 7 by a bolt, and the other end extends into the through groove 502 and is connected to the piston. The electromagnet 501 is inlaid and connected to the inner wall of the cavity 5, and the electromagnet 501 is magnetically connected to the magnetic plate 701 at one end of the protrusion 7. When in use, first place the cylinder head and the screw on the base of the shell 1, and then control the positioning frame 2 to move in the shell 1 through the PLC controller to drive the sleeve 401 and the screw sleeve, and continue to press down to embed the screw into the screw hole. When pressing down, the reverse pressure drives the connecting rod 4 to shrink in the hole groove 301, and at the same time, the outer wall of the connecting rod 4 abuts against the protrusion 7 to push it into the cavity 5 to shrink. When the protrusion 7 shrinks, it pushes the piston through the support rod 702 to squeeze the gas in the through groove 502 into the air chamber 6, and the contraction of the connecting rod 4 increases the amount of contraction of the protrusion 7. The increase in the contraction of the protrusion 7 increases the air pressure in the air chamber 6. When the sensor detects that the pressure in the air chamber 6 reaches the specified value, it sends a signal and controls the positioning frame 2 to stop running through the PLC controller, and at the same time controls the electromagnet 501 in the corresponding cavity 5 above the connecting rod 4 to run and generate magnetic poles that repel magnetically with the magnetic plate 701, pushing the protrusion 7 to extend to the outside of the cavity 5 to support and lock the connecting rod 4, and then connects it to the connector of the fixed frame 3 through the cylinder 201 for tightening.

[0025] The working process of the utility model is as follows: when in use, the cylinder head and the screw are first placed on the base of the shell 1, and then the positioning frame 2 is controlled by the PLC controller to move in the shell 1 to drive the sleeve 401 and the screw sleeve, and at the same time, the screw is embedded in the screw hole by continuing to press down. When pressing down, the reverse pressure drives the connecting rod 4 to shrink in the hole groove 301, and at the same time, the outer wall of the connecting rod 4 abuts against the protrusion 7 to push it into the cavity 5 to shrink. When the protrusion 7 shrinks, it pushes the piston through the support rod 702 to squeeze the gas in the through groove 502 into the gas chamber 6 The connecting rod 4 contracts, increasing the amount of contraction of the protrusion 7. This increase in the amount of contraction of the protrusion 7 increases the air pressure in the air chamber 6. When the sensor detects that the pressure in the air chamber 6 has reached a specified value, it sends a signal and controls the positioning frame 2 to stop operating via the PLC controller. Simultaneously, the electromagnet 501 in the corresponding cavity 5 above the connecting rod 4 is controlled to operate and generate magnetic poles that magnetically repel the magnetic plate 701, pushing the protrusion 7 to extend outside the cavity 5 to support and lock the connecting rod 4. The protrusion 7 is then connected to the connector of the fixed frame 3 via the cylinder 201 for tightening. This utility model provides a buffer space when tightening the screw, preventing damage to the screw caused by excessive downward pressure, and performs real-time detection of the tightening pressure to ensure sufficient tightening pressure and improve tightening stability.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compressor cylinder head screw fastening device, comprising a housing (1) and a positioning frame (2), wherein one end of the positioning frame (2) is provided with a cylinder (201), and the other end is provided with a fastening assembly for squeezing and fastening the screw, characterized in that: The fastening assembly comprises a fixing frame (3) arranged at one end of the positioning frame (2), four holes (301) are arranged inside the fixing frame (3), connecting rods (4) are arranged inside the four holes (301), and a sleeve (401) is arranged at the other end of the connecting rod (4); The inner wall of the hole groove (301) is provided with a plurality of cavities (5), the inner walls of the plurality of cavities (5) are all provided with electromagnets (501), one end of the cavity (5) is provided with a through groove (502) and an air chamber (6), a protrusion (7) is provided inside the cavity (5), and one end of the protrusion (7) is provided with a magnetic plate (701) and a support rod (702).

2. A compressor cylinder head screw fastening device according to claim 1, characterized in that: The fixing frame (3) is connected to the end of the positioning frame (2) away from the cylinder (201) by bolts. The angle of the cylinder (201) corresponds to that of the fixing frame (3). Four connectors are installed on the end of the fixing frame (3) close to the cylinder (201) and embedded in the hole grooves (301) of the fixing frame (3).

3. The compressor cylinder head screw fastening device according to claim 1, characterized in that: One end of the connecting rod (4) is located in the hole groove (301) and is slidably connected to the inner wall of the hole groove (301), and the other end is connected to the sleeve (401). The end of the sleeve (401) away from the connecting rod (4) is a hollow structure corresponding to the screw structure.

4. The compressor cylinder head screw fastening device according to claim 1, characterized in that: A plurality of cavities (5) are arrayed on the inner wall of the hole groove (301), and the through groove (502) is connected to the gas chamber (6) at one end away from the cavity (5). The gas chamber (6) is loaded with high-pressure gas and is equipped with a pressure sensor.

5. The compressor cylinder head screw fastening device according to claim 1, characterized in that: One end of the protrusion (7) is a conical structure, and the other end extends into the cavity (5) and is slidably connected to the inner wall of the cavity (5). One end of the support rod (702) is connected to the protrusion (7) via a bolt, and the other end extends into the through groove (502) and is connected to the piston.

6. The compressor cylinder head screw fastening device according to claim 1, characterized in that: The electromagnet (501) is embedded and connected to the inner wall of the cavity (5), and the electromagnet (501) is magnetically connected to the magnetic plate (701) at one end of the protrusion (7).

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