Compressor stator screw fastening device

Abstract

The utility model relates to the technical field of compressor machining, in particular to a compressor stator screw fastening device which comprises a base, a connector is arranged at one end of the base, an air cylinder is arranged at the other end of the base, a fastening assembly used for driving screwing is arranged at the output end of the air cylinder, and the fastening assembly comprises a fixing frame arranged at the output end of the air cylinder. A sleeve is arranged in the fixed frame; a plurality of cavities are formed in the inner wall of the sleeve, tooth blocks and pressure valves are arranged on the inner walls of the cavities, and pressure relief bins are arranged at the ends, away from the cavities, of the pressure valves; a clamping sleeve is arranged in the fixing frame, and a gear is arranged at one end of the clamping sleeve. Air pressure serves as a supporting source for connection, resistance after screwing of the screw is completed is larger than air pressure strength, driving force of a knob can be cut off, pressure applied to the screw is reduced, the screw is protected, and damage to threads is avoided.

Description

Technical Field

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

[0002] A compressor is a device used to increase the pressure of a gas and is widely used in industrial, commercial, and domestic environments. A compressor increases the pressure of a gas by reducing its volume. This is typically achieved through mechanical motion, such as the reciprocating motion of a piston in a cylinder or the intermeshing of rotating screws. The compressor stator is a critical stationary component that, along with the rotor, forms the main body of the compressor. Tightening the stator screws is a crucial step in compressor maintenance and repair.

[0003] However, in the current existing technology, when tightening the screws of the stator, the screws are driven by a driving motor to rotate and tighten. However, when the screws are rotated to the bottom of the screw hole, there is a certain error in the tightening because the insertion distance of the screws is generally determined by the naked eye. After the screws are tightened, if they continue to rotate, pressure is applied to the surface threads, causing the threads to slip or break, thereby affecting the tightening stability of the screws. Utility Model Content

[0004] The purpose of the present utility model is to provide a compressor stator 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 stator screw fastening device comprises a base, a connector provided at one end of the base and a cylinder provided at the other end, a fastening assembly for driving the screwing provided at the output end of the cylinder, the fastening assembly comprising a fixing frame provided at the output end of the cylinder, a sleeve provided inside the fixing frame;

[0007] The inner wall of the sleeve is provided with a plurality of cavities, the inner walls of the plurality of cavities are each provided with a tooth block and a pressure valve, and the pressure valve is provided with a pressure relief chamber at one end away from the cavity;

[0008] A clamping sleeve is provided inside the fixing frame, and a gear is provided at one end of the clamping sleeve.

[0009] As a preferred solution of the present invention, the connector is located at one end of the base and connected to the screw sleeve, and the cylinder is located at an end of the base away from the connector and corresponds to the angle of the connector.

[0010] As a preferred solution of the present invention, the cylinder output end is connected to the fixed frame by bolts, the sleeve is located in the fixed frame, and is rotationally connected to the cylinder output end through a connecting shaft, and the sleeve is driven by the rotation of the sleeve as a driving source.

[0011] As a preferred solution of the present invention, multiple cavities are distributed in an annular manner on the inner wall of the sleeve, one end of the tooth block is located in the cavity and is slidingly connected to the inner wall of the cavity, and the other end extends into the fixed frame, and the cavity is loaded with high-pressure gas.

[0012] As a preferred solution of the present invention, the two ends of the pressure valve are isolated from the cavity and the pressure relief chamber, the high-pressure gas in the cavity supports the gear block, and a piston is installed on one end of the gear block close to the cavity. When the piston slides and contracts in the cavity, the high-pressure gas in the cavity is squeezed. The pressure after squeezing can push the pressure valve open, so that the gas is injected into the pressure relief chamber.

[0013] As a preferred solution of the present invention, one end of the ferrule extends into the fixed frame and is rotatably connected to the fixed frame through a bearing. The ferrule is located at one end of the fixed frame and is coaxially connected to the gear. The gear is located on the inner wall of the sleeve and engages with the tooth block on the inner wall of the sleeve.

[0014] Compared with the prior art, the beneficial effects of the present invention are: in response to the problems raised in the background technology, the present application adopts a fastening assembly, which drives the screw sleeve to engage and position with the screw on the placement table through the movement of the base, and then the cylinder extends to drive the sleeve to connect with the connecting head of the screw sleeve, and the tooth block on the inner wall of the sleeve in the fixed frame is engaged with the gear at one end of the sleeve. The sleeve drive cooperates with the tooth block to drive the sleeve to tighten the screw. When the screw is tightened, resistance will be generated. Therefore, if the sleeve continues to drive, the damping effect of the screw will be applied to the gear, which will increase the pressure of the tooth block and the pressure will be greater than the strength of the air pressure inside the tooth block, causing the tooth block to contract and squeeze the gas into the pressure relief chamber, so that the pressure of the tooth block is reduced and the sleeve cannot be started, so as to achieve buffering after the twisting is completed, avoid continuous pressure on the screw, and protect the thread integrity of the screw.

[0015] The utility model uses air pressure as a support source for connection. When the screw is tightened, the resistance is greater than the air pressure strength, which can disconnect the driving force of the screw, reduce the pressure on the screw, protect the screw, and avoid damage to the thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 This is the appearance structure diagram of the cylinder 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 a top sectional view of the fixing frame of the utility model;

[0020] Figure 5This is an enlarged view of part A of the present utility model.

[0021] In the figure: 1, base; 2, connector; 3, cylinder; 4, fixing frame; 5, sleeve; 6, cavity; 601, gear block; 602, pressure valve; 7, pressure relief chamber; 8, ferrule; 801, gear. DETAILED DESCRIPTION

[0022] 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

[0023] See also Figure 1-5 The present invention provides a technical solution: a compressor stator screw fastening device, comprising a base 1, one end of the base 1 is provided with a connecting head 2, one end of the connecting head 2 is coaxially connected to the screw sleeve, the output end of the cylinder 3 is connected to the connecting head 2, and the driving force of the twisting is transmitted to the screw sleeve to tighten the screw, thereby tightening the screw. The other end is provided with a cylinder 3, and the output end of the cylinder 3 is provided with a fastening component for driving the twisting, and the fastening component includes a fixing frame 4 arranged at the output end of the cylinder 3, a sleeve 5 is provided inside the fixing frame 4, one end of the sleeve 5 is connected to the output end of the cylinder 3 by a connecting shaft, so that it can be used as a driving source to generate a rotating driving force for twisting the screw, and a plurality of cavities 6 are provided on the inner wall of the sleeve 5 for positioning the angle of the gear block 601, and the high-pressure gas inside the cavity 6 can push the gear block 601 toward the outside of the cavity 6 and support the gear block 601, and the gear block 601 and the gear 80 are tightened by the gas pressure. 1 Pressure support during meshing to ensure the stability of meshing. The inner walls of the multiple cavities 6 are all provided with tooth blocks 601 and pressure valves 602. The tooth blocks 601 mesh with the gears 801, so that when the sleeve 5 is driven to rotate, the engagement drives the ferrule 8 to rotate synchronously. The pressure valve 602 is used to isolate the cavity 6 from the pressure relief chamber 7. When the screw is tightened, the resistance generated acts on the ferrule 8 and the gear 801 through the connector 2, and the resistance of the screw is greater than the pressure in the cavity 6. When the sleeve 5 continues to rotate and apply pressure, the tooth block 601 is squeezed by the resistance of the gear 801 (matching the angle of the tooth block 601 and the gear 801), driving the tooth block 601 to contract into the cavity 6. At the same time, the gas in the cavity 6 is squeezed, resulting in an increase in pressure. The pressure valve 602 is pushed open by the pressure to relieve the pressure, so that the rotational force of the sleeve 5 cannot act on the ferrule 8, thereby achieving disconnection and protecting the screw. The pressure valve 602 is provided with a pressure relief chamber 7 at one end away from the cavity 6.

[0024] A clamping sleeve 8 is provided inside the fixing frame 4 , and a gear 801 is provided at one end of the clamping sleeve 8 .

[0025] In this embodiment, all electrical components are controlled by conventional controllers.

[0026] For example, please refer to Figure 1-5 , the connector 2 is located at one end of the base 1 and is connected to the screw sleeve, the cylinder 3 is located at one end of the base 1 away from the connector 2, and corresponds to the angle of the connector 2, the output end of the cylinder 3 is connected to the fixed frame 4 by a bolt, the sleeve 5 is located in the fixed frame 4, and is rotatably connected to the output end of the cylinder 3 through the connecting shaft, and the sleeve 8 is driven by the rotation of the sleeve 5 as a driving source, and multiple cavities 6 are annularly distributed on the inner wall of the sleeve 5, one end of the tooth block 601 is located in the cavity 6, and is slidably connected to the inner wall of the cavity 6, and the other end extends into the fixed frame 4, and the cavity 6 is loaded with high-pressure gas. The two ends of the pressure valve 602 isolate the cavity 6 and the pressure relief chamber 7. The high-pressure gas in the cavity 6 supports the gear block 601. The gear block 601 is installed with a piston at one end close to the cavity 6. When it slides and contracts in the cavity 6, it squeezes the high-pressure gas in the cavity 6. The pressure after squeezing can push the pressure valve 602 open, so that the gas is injected into the pressure relief chamber 7. One end of the ferrule 8 extends into the fixed frame 4 and is rotatably connected to the fixed frame 4 through a bearing. The ferrule 8 is located at one end of the fixed frame 4 and is coaxially connected to the gear 801. The gear 801 is located on the inner wall of the sleeve 5 and meshes with the gear block 601 on the inner wall of the sleeve 5. During use, the base 1 is first moved to drive the screw sleeve at one end to engage with the screw during stator installation, and then the PLC controller controls the cylinder 3 to extend to drive the ferrule 8 at one end to connect with the connector 2 of the screw sleeve, and at the same time controls the sleeve 5 to activate and rotate, and the ferrule 8 is driven to rotate synchronously through the engagement of the inner wall of the sleeve 5 with the tooth block 601 and the gear 801, and the driving force of the rotation is transmitted to the screw sleeve through the ferrule 8 to twist and tighten the screw. When the screw is tightened, resistance is generated. If the sleeve 5 continues to rotate at this time, the tooth block 601 is pressed by the resistance to match the angle of the tooth block 601, so that the tooth block 601 shrinks into the cavity 6, and at the same time, the tooth block 601 squeezes the gas in the cavity 6 through the pressure valve 602 into the pressure relief chamber 7, disconnecting the sleeve 5 and the ferrule 8, thereby protecting the screw.

[0027] The working process of the present invention is as follows: when in use, the base 1 is first moved to drive the screw sleeve at one end to engage with the screw when the stator is installed, and then the PLC controller controls the cylinder 3 to extend and drive the ferrule 8 at one end to connect with the connector 2 of the screw sleeve, and at the same time controls the sleeve 5 to activate and rotate, and the inner wall of the sleeve 5 engages with the tooth block 601 and the gear 801 to drive the ferrule 8 to rotate synchronously, and the driving force of the rotation is transmitted to the screw sleeve through the ferrule 8 to tighten the screw, when the screw is tightened, resistance is generated. If the sleeve 5 continues to rotate at this time, the resistance is applied to the tooth block 601 to match the angle of the tooth block 601 so that the tooth block 601 shrinks into the cavity 6, and the tooth block 601 squeezes the gas in the cavity 6 through the pressure valve 602 into the pressure relief chamber 7, disconnecting the sleeve 5 from the ferrule 8, thereby protecting the screw. The present invention uses air pressure as the support source for connection. After the screw is tightened, the resistance is greater than the air pressure strength, which can disconnect the driving force of the twisting, reduce the pressure on the screw, and play a protective effect on the screw to avoid thread damage.

[0028] 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 stator screw fastening device, comprising a base (1), wherein one end of the base (1) is provided with a connector (2), and the other end is provided with a cylinder (3), and the output end of the cylinder (3) is provided with a fastening component for driving the screwing, characterized in that: The fastening assembly comprises a fixing frame (4) arranged at the output end of the cylinder (3), and a sleeve (5) is arranged inside the fixing frame (4); The inner wall of the sleeve (5) is provided with a plurality of cavities (6), the inner walls of the plurality of cavities (6) are all provided with tooth blocks (601) and pressure valves (602), and the pressure valve (602) is provided with a pressure relief chamber (7) at one end away from the cavity (6); A clamping sleeve (8) is provided inside the fixing frame (4), and a gear (801) is provided at one end of the clamping sleeve (8).

2. A compressor stator screw fastening device according to claim 1, characterized in that: The connecting head (2) is located at one end of the base (1) and is connected to the screw sleeve, and the cylinder (3) is located at one end of the base (1) away from the connecting head (2) and corresponds to the angle of the connecting head (2).

3. The compressor stator screw fastening device according to claim 1, characterized in that: The output end of the cylinder (3) is connected to the fixed frame (4) via a bolt, and the sleeve (5) is located in the fixed frame (4) and is rotationally connected to the output end of the cylinder (3) via a connecting shaft. The sleeve (5) is rotated as a driving source to drive the ferrule (8).

4. The compressor stator screw fastening device according to claim 1, characterized in that: A plurality of the cavities (6) are distributed in an annular manner on the inner wall of the sleeve (5); one end of the tooth block (601) is located in the cavity (6) and is slidably connected to the inner wall of the cavity (6); the other end extends into the fixed frame (4); and the cavity (6) is loaded with high-pressure gas.

5. The compressor stator screw fastening device according to claim 1, characterized in that: The two ends of the pressure valve (602) isolate the cavity (6) and the pressure relief chamber (7), and the high-pressure gas in the cavity (6) supports the gear block (601). A piston is installed at one end of the gear block (601) close to the cavity (6). When the piston slides and contracts in the cavity (6), the high-pressure gas in the cavity (6) is squeezed. The pressure after the squeezing can push the pressure valve (602) open, so that the gas is injected into the pressure relief chamber (7).

6. The compressor stator screw fastening device according to claim 1, characterized in that: One end of the ferrule (8) extends into the fixed frame (4) and is rotatably connected to the fixed frame (4) via a bearing. The ferrule (8) is located at one end of the fixed frame (4) and is coaxially connected to the gear (801). The gear (801) is located on the inner wall of the sleeve (5) and meshes with the tooth block (601) on the inner wall of the sleeve (5).

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