Gas self-locking tolerance hook pin cylinder

Abstract

The utility model discloses a pneumatic self-locking tolerance hook pin cylinder, which particularly relates to the field of automobile processing devices and comprises a shell, a cylinder barrel is arranged at the bottom of the shell, an upper cover is fixedly arranged between the shell and the cylinder barrel, a lower cover is fixedly arranged at the bottom of the cylinder barrel, a top cover plate is arranged at the top of the shell, and a positioning support block is arranged at the top of the top cover plate. And a cylinder pin is arranged between the positioning support block and the top cover plate. According to the utility model, the cylinder hook is driven to swing up and down by utilizing the reciprocating action of the cylinder piston so as to clamp a workpiece, so that the function of locking the workpiece by the cylinder hook is realized, the clamping and positioning precision of the workpiece by the tool is ensured, and the precision of a welding process is greatly ensured; the rubber ball quickly blocks the communicating position of the cavities under the double acting force of the elastic force of the spring and the upper cavity of the piston, so that airflow in the upper cavity of the piston cannot be discharged, pressure is kept, the air-cut self-locking function is achieved, and the tool failure under the conditions of power failure and air cut is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile processing devices, and more specifically to a gas self-locking tolerance canceling cylinder. Background Art

[0002] The body welding line, one of the four major production processes of automobile production, has also gone from low efficiency to high efficiency. There is a certain gap between my country's automobile industry and developed countries in terms of overall design planning concepts and processing and manufacturing levels. In order to improve the quality and production capacity of domestically produced automobiles, it is necessary to put forward more stringent requirements on the production process and also put forward higher requirements on the tooling and fixtures in automobile production.

[0003] The clamps currently used in the largest number of automobile factory welding lines have the following shortcomings:

[0004] (1) Large size: Increases the overall size of the fixture and gripper;

[0005] (2) Poor precision: Most common piston linear cylinders use external mechanisms to achieve tightening, and the accuracy is difficult to guarantee;

[0006] (3) Self-locking function: prevent the workpiece from falling out of the fixture or the manual fixture from falling or losing its shape in the event of power failure or gas failure;

[0007] (4) Heavy weight: Both the weight of the clamp and the installation accessories increase the weight of the clamp and gripper, reducing the load capacity;

[0008] (5) Easy to interfere: The size of the clamp product itself and the layout of the clamping points are susceptible to interference problems caused by the location of the welding point, the placement of the workpiece, and the coordination of the tooling. Utility Model Content

[0009] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a gas self-locking tolerance detent cylinder.

[0010] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas self-locking tolerance pin cylinder, comprising a shell, a cylinder barrel is provided at the bottom of the shell, an upper cover is fixedly provided between the shell and the cylinder barrel, a lower cover is fixedly provided at the bottom of the cylinder barrel, a top cover plate is provided at the top of the shell, a positioning support block is provided at the top of the top cover plate, a cylinder pin is provided between the positioning support block and the top cover plate, a dust cover plate is provided between the bottom end of the cylinder pin and the top cover plate, a cylinder hook is provided between the cylinder pin and the inner cavity of the shell, the dust cover plate is movably connected to the cylinder hook, and the dust cover plate swings left and right with the cylinder hook;

[0011] A piston rod is provided between the bottom end of the cylinder hook and the lower cover, a fork-shaped piece is provided between the top end of the piston rod and the cylinder hook, the top end of the fork-shaped piece is connected to the bottom end of the cylinder hook by a connecting pin, a fixing pin is fixedly provided in the middle part of the inner cavity of the shell, and a connecting groove is provided at the connection between the middle part of the cylinder hook and the fixing pin, a working cavity is formed between the upper cover, the cylinder barrel and the lower cover, and a piston is provided in the working cavity, the center of the piston is fixedly connected to the piston rod, and the working cavity is divided into an upper piston cavity and a lower piston cavity by the piston.

[0012] In a preferred embodiment, a sensor is provided at the outer wall of the shell, and the sensor is fixedly mounted on the shell through a mounting bracket, an upper sensing block and a lower sensing block are provided at the inner cavity of the shell, and the upper sensing block and the lower sensing block are provided at the sensor input end;

[0013] The fork-shaped piece is fixedly connected with a sensing sheet, and when the cylinder hook is locked, the sensing sheet contacts the sensing point of the sensing block on the sensor to form an induced electrical signal.

[0014] In a preferred embodiment, the upper cover, the lower cover and the cylinder are fixed to the housing by screws, and the top cover plate and the positioning bracket are fixed to the housing by bolts, so as to fix the relative position between the cylinder pin and the housing.

[0015] In a preferred embodiment, the lower cover is provided with an air inlet O and an air inlet C, and the air inlet O and the air inlet C are communicated with the working cavity, sealing blocks are provided at the openings at both ends of the air inlet O and the air inlet C, and an air valve piston rod is provided inside the air inlet O and the air inlet C, one end of the air valve piston rod is fixedly connected to the sealing block, and the other end of the air valve piston rod is connected to a rubber ball, and a spring is provided between the rubber ball and the sealing block away from one end of the air valve piston rod.

[0016] In a preferred embodiment, the cavities of the air inlet O and the air inlet C are separated into cavity I, cavity II and cavity III by a sealing block and a gas valve piston rod.

[0017] Technical effects and advantages of the utility model:

[0018] The utility model utilizes the reciprocating action of the cylinder piston to drive the cylinder hook to swing up and down so as to clamp the workpiece, that is, air is taken in through the air inlet C of the lower cover, the airflow enters the cavity II, pushes the rubber ball to move rightward, so that the airflow enters the cavity III and then enters the upper cavity of the piston, so that the piston moves downward, the piston drives the piston rod and the fork-shaped piece to move downward, the fork-shaped piece drives the cylinder hook to move downward through the connecting pin, so as to realize the function of the cylinder hook locking the workpiece, ensure the tightening and positioning accuracy of the tooling on the workpiece, and greatly ensure the accuracy of the welding process. When the external air source is disconnected, the rubber ball quickly blocks the connection between the cavities under the dual forces of the spring elastic force and the upper cavity of the piston, so that the airflow in the upper cavity of the piston cannot be discharged and the pressure is maintained, so as to realize the self-locking function of air failure, and effectively prevent the tooling from failing under power failure and air failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the cutaway structure of the utility model.

[0021] Figure 3 It is a cutaway (partial) structural schematic diagram of the utility model.

[0022] Figure 4 It is a side view of the overall structure of the utility model.

[0023] The accompanying drawings are marked as: 1 cylinder pin, 2 cylinder hook, 3 positioning support block, 4 dust cover plate, 5 top cover plate, 6 shell, 7 connecting pin, 8 fork-shaped piece, 9 upper cover, 10 cylinder barrel, 11 piston, 12 upper sensing block, 13 lower sensing block, 14 sensor, 15 sensor sheet, 16 piston rod, 17 lower cover, 18 valve piston rod, 19 rubber ball, 20 spring, 21 fixing pin, 22 upper piston cavity, 23 lower piston cavity, 24 cavity I, 25 cavity II, 26 cavity III, 27 air inlet O, 28 air inlet C. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model provides a gas self-locking tolerance hook pin cylinder, comprising a shell 6, a cylinder barrel 10 is arranged at the bottom of the shell 6, an upper cover 9 is fixedly arranged between the shell 6 and the cylinder barrel 10, a lower cover 17 is fixedly arranged at the bottom of the cylinder barrel 10, a top cover plate 5 is arranged at the top of the shell 6, a positioning support block 3 is arranged at the top of the top cover plate 5, a cylinder pin 1 is arranged between the positioning support block 3 and the top cover plate 5, a dust cover plate 4 is arranged between the bottom end of the cylinder pin 1 and the top cover plate 5, a cylinder hook 2 is arranged between the cylinder pin 1 and the inner cavity of the shell 6, the dust cover plate 4 is movably connected with the cylinder hook 2, and the dust cover plate 4 swings left and right with the cylinder hook 2;

[0026] A piston rod 16 is provided between the bottom end of the cylinder hook 2 and the lower cover 17, a fork-shaped piece 8 is provided between the top end of the piston rod 16 and the cylinder hook 2, the top end of the fork-shaped piece 8 is connected to the bottom end of the cylinder hook 2 by a connecting pin 7, a fixing pin 21 is fixedly provided in the middle of the inner cavity of the shell 6, and a connecting groove is provided at the connection between the middle of the cylinder hook 2 and the fixing pin 21, a working cavity is formed between the upper cover 9, the cylinder barrel 10 and the lower cover 17, and a piston 11 is provided in the working cavity, the center of the piston 11 is fixedly connected to the piston rod 16, and the working cavity is divided into a piston upper cavity 22 and a piston lower cavity 23 by the piston 11, the upper cover 9, the lower cover 17 and the cylinder barrel 10 are fixed to the shell 6 by screws, and the top cover plate 5 and the positioning bracket 3 are fixed to the shell 6 by bolts, so as to complete the fixation of the relative position between the cylinder pin 1 and the shell 6;

[0027] The lower cover 17 is provided with an air inlet O 27 and an air inlet C 28, and the air inlet O 27 and the air inlet C 28 are connected with the working cavity, and sealing blocks are provided at the openings at both ends of the air inlet O 27 and the air inlet C 28. The air inlet O 27 and the air inlet C 28 are provided with a valve piston rod 18 inside, one end of the air valve piston rod 18 is fixedly connected to the sealing block, and the other end of the air valve piston rod 18 is connected to a rubber ball 19, and a spring 20 is provided between the rubber ball 19 and the sealing block away from one end of the air valve piston rod 18. The air inlet O 27 and the air inlet C 28 cavity are separated into cavity I 24, cavity II 25 and cavity III 26 by the sealing block and the air valve piston rod 18;

[0028] A sensor 14 is provided on the outer wall of the shell 6, and the sensor 14 is fixedly installed on the shell 6 through a mounting bracket, an upper sensing block 12 and a lower sensing block 13 are provided in the inner cavity of the shell 6, and the upper sensing block 12 and the lower sensing block 13 are arranged at the input end of the sensor 14; a sensing sheet 15 is fixedly connected at the position of the fork-shaped member 8, and when the cylinder hook 2 is locked, the sensing sheet 15 contacts the sensing point of the upper sensing block 12 to form an induced electrical signal.

[0029] like Figure 1-4As shown, the specific implementation method is: the cylinder hook 2 is driven to swing up and down by the reciprocating motion of the cylinder piston 11 to clamp the workpiece, that is, air is taken in through the air inlet C 28 of the lower cover 17, and the airflow enters the cavity II 25, pushing the rubber ball 19 to move rightward, so that the airflow enters the cavity III 26 and then enters the cavity 22 of the piston, so that the piston 11 moves downward, the piston 11 drives the piston rod 16 and the fork-shaped member 8 to move downward, and the fork-shaped member 8 drives the cylinder hook 2 to move downward through the connecting pin 7, so that the cylinder hook 2 can lock the workpiece;

[0030] At this time, when the external air source is disconnected, the rubber ball 19 quickly blocks the connection between the cavity 3 and the cavity 2 under the dual force of the spring 20 and the upper cavity of the piston 11, so that the air flow in the upper cavity of the piston 11 cannot be discharged and the pressure is maintained, thereby realizing the air cut-off self-locking function;

[0031] The cylinder hook 2 generates a trajectory around the fixing pin 21 during the up and down movement, thereby realizing the clamping tolerance function, with a tolerance range of 0-8mm; when air is introduced into the air inlet O 27 of the lower cover 17, the airflow enters the cavity I, and then enters the lower cavity of the piston 11, and at the same time, the airflow pushes the valve piston rod 18 to move rightward, and then pushes the rubber ball 19 to move rightward, and the cavity 3 is reconnected with the cavity 2, and the airflow above the piston 11 is discharged;

[0032] The piston 11 drives the piston rod 16 to drive the cylinder hook 2 to move upward, and the cylinder hook 2 completes the opening action; the dust cover 4 completely wraps the cylinder hook 2 and swings left and right with the cylinder hook 2, which can effectively block welding slag and debris from entering the product, thereby ensuring the stable operation of the product; the cylinder pin 1, the cylinder hook 2 and the positioning bracket 3 can be easily replaced by loosening the bolts at the position of the positioning bracket 3;

[0033] The built-in sensor 14 of the pin cylinder to prevent welding slag can transmit the locked and opened position states of the cylinder hook 2 when the clamp is working to the entire control system in the form of electrical signals. When the cylinder hook 2 is locked, the sensor sheet 15 on the fork-shaped part 8 is close to the sensing point of the upper sensing block 12, and the sensor 14 outputs a locking signal to the outside. When the cylinder hook 2 is opened, the sensing block of the fork-shaped part 8 is close to the sensing point of the lower sensing block 13, and the sensor 14 outputs an opening signal to the outside. The entire clamp adopts a high-strength aluminum alloy closed shell 6 to ensure the working stability of the system and the cleanliness of the system.

[0034] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0035] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0036] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A pneumatic self-locking tolerance detent cylinder, comprising a housing (6), characterized in that: The bottom of the shell (6) is provided with a cylinder barrel (10), an upper cover (9) is fixedly provided between the shell (6) and the cylinder barrel (10), a lower cover (17) is fixedly provided at the bottom of the cylinder barrel (10), a top cover plate (5) is provided at the top of the shell (6), a positioning support block (3) is provided at the top of the top cover plate (5), a cylinder pin (1) is provided between the positioning support block (3) and the top cover plate (5), a dust cover plate (4) is provided between the bottom end of the cylinder pin (1) and the top cover plate (5), a cylinder hook (2) is provided between the cylinder pin (1) and the inner cavity of the shell (6), the dust cover plate (4) is movably connected to the cylinder hook (2), and the dust cover plate (4) swings left and right with the cylinder hook (2); A piston rod (16) is provided between the bottom end of the cylinder hook (2) and the lower cover (17), a fork-shaped piece (8) is provided between the top end of the piston rod (16) and the cylinder hook (2), the top end of the fork-shaped piece (8) and the bottom end of the cylinder hook (2) are connected via a connecting pin (7), a fixing pin (21) is fixedly provided in the middle of the inner cavity of the shell (6), and a connecting groove is provided at the connection between the middle of the cylinder hook (2) and the fixing pin (21), a working cavity is formed between the upper cover (9), the cylinder barrel (10) and the lower cover (17), and a piston (11) is provided in the working cavity, the center of the piston (11) is fixedly connected to the piston rod (16), and the working cavity is divided into a piston upper cavity (22) and a piston lower cavity (23) by the piston (11).

2. The pneumatic self-locking tolerance detent cylinder according to claim 1, characterized in that: A sensor (14) is provided on the outer wall of the shell (6), and the sensor (14) is fixedly mounted on the shell (6) via a mounting bracket; an upper sensing block (12) and a lower sensing block (13) are provided in the inner cavity of the shell (6), and the upper sensing block (12) and the lower sensing block (13) are arranged at the input end of the sensor (14); A sensing sheet (15) is fixedly connected to the fork-shaped piece (8), and when the cylinder hook (2) is locked, the sensing sheet (15) contacts the sensing point of the sensing block (12) on the sensor to form an induced electrical signal.

3. The pneumatic self-locking tolerance detent cylinder according to claim 1, characterized in that: The upper cover (9), the lower cover (17) and the cylinder barrel (10) are fixed to the housing (6) by means of screws, and the top cover plate (5) and the positioning support block (3) are fixed to the housing (6) by means of bolts, thereby completing the fixation of the relative position between the cylinder pin (1) and the housing (6).

4. The pneumatic self-locking tolerance detent cylinder according to claim 1, characterized in that: The lower cover (17) is provided with an air inlet O (27) and an air inlet C (28), and the air inlet O (27) and the air inlet C (28) are in communication with the working cavity. Sealing blocks are provided at both ends of the openings of the air inlet O (27) and the air inlet C (28). A valve piston rod (18) is provided inside the air inlet O (27) and the air inlet C (28). One end of the valve piston rod (18) is fixedly connected to the sealing block, and the other end of the valve piston rod (18) is connected to a rubber ball (19). A spring (20) is provided between the rubber ball (19) and the sealing block away from one end of the valve piston rod (18).

5. The pneumatic self-locking tolerance detent cylinder according to claim 4, characterized in that: The air inlet O (27) and the air inlet C (28) cavities are separated into cavity I (24), cavity II (25) and cavity III (26) by a sealing block and a gas valve piston rod (18).

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