Parallel self-locking tolerance clamping cylinder

Abstract

The utility model discloses a parallel self-locking tolerance clamping cylinder, which relates to the field of clamping devices, and comprises a shell, the top of the shell is fixedly connected with a supporting block, the bottom of the shell is fixedly connected with a lower cover, the outer wall of the shell is fixedly connected with a sensor support, the sensor support is fixedly connected with a sensor, and the sensor is fixedly connected with the supporting block. A sleeve is fixedly connected to the inner side of the shell, a pin is arranged in the sleeve in a penetrating mode, a second piston is arranged at the bottom of the pin, a piston rod is fixedly connected to the interior of the pin, and the piston rod is fixedly connected with the first piston and penetrates through the second piston to reach the interior of the pin. According to the utility model, the overall shape space size of the clamp and the gripper is reduced, so that the overall size is smaller, and the occupied space is smaller; the precision is high, the clamping and positioning precision of the tool on the workpiece is guaranteed, and the precision of the welding process is greatly guaranteed; the self-locking function is achieved, and the tool failure under the conditions of power failure and gas failure is effectively prevented; and due to the tolerance function, the workpiece can be effectively clamped within the thickness range of 0-10 mm.

Description

Technical Field

[0001] The utility model relates to the field of clamping devices, and particularly to a parallel self-locking tolerance clamping cylinder. Background Art

[0002] A clamping device is a device that converts the energy of compressed air into mechanical energy of linear reciprocating motion to clamp or release a workpiece. As an important mechanical device, the clamping cylinder plays an important role in modern manufacturing. By reasonable selection and use, the production efficiency and product quality can be greatly improved. The clamping devices used in the current largest-volume automotive factory welding lines have the following disadvantages:

[0003] 1. Large volume, increasing the overall external dimension of the fixture and gripper.

[0004] 2. Poor accuracy. Most use ordinary piston-type linear cylinders to achieve clamping with external mechanisms, and it is difficult to guarantee the accuracy.

[0005] 3. Without self-locking function, it cannot prevent the workpiece from detaching from the fixture or the gripper tooling from falling or losing deformation in case of power failure or air supply interruption.

[0006] 4. Heavy weight. Both the self-weight of the clamping device and the installation accessories increase the weight of the fixture and gripper, reducing the load capacity.

[0007] 5. Prone to interference. The size of the clamping device product itself and the layout of the clamping points are prone to interference problems caused by the solder joint position, workpiece picking and placing, and tooling coordination.

[0008] 6. Small clamping range; the clamping range is very small, difficult to debug, and unable to adapt to flexible design.

[0009] Therefore, it is necessary to invent a parallel self-locking tolerance clamping cylinder to solve the above problems. Content of the Utility Model

[0010] The purpose of the utility model is to provide a parallel self-locking tolerance clamping cylinder to solve the problems of large volume of the clamping device as mentioned in the above background art, increasing the overall external dimension of the fixture and gripper; poor accuracy, most using ordinary piston-type linear cylinders to achieve clamping with external mechanisms, and it is difficult to guarantee the accuracy; without self-locking function, unable to prevent the workpiece from detaching from the fixture or the gripper tooling from falling or losing deformation in case of power failure or air supply interruption; heavy weight, both the self-weight of the clamping device and the installation accessories increasing the weight of the fixture and gripper, reducing the load capacity; prone to interference, the size of the clamping device product itself and the layout of the clamping points being prone to interference problems caused by the solder joint position, workpiece picking and placing, and tooling coordination; small clamping range; the clamping range is very small, difficult to debug, and unable to adapt to flexible design.

[0011] To achieve the above object, the present utility model provides the following technical solutions: a parallel self-locking tolerance clamping cylinder, including a housing, a support block is fixedly connected to the top of the housing, a lower cover is fixedly connected to the bottom of the housing, a sensor bracket is fixedly connected to the outer wall of the housing, and the sensor bracket is fixedly connected to a sensor. A sleeve is fixedly connected to the inner side of the housing, and a pin penetrates through the inside of the sleeve. A piston two is arranged at the bottom of the pin, and a piston rod is fixedly connected to the inside of the pin. The piston rod is fixedly connected to a piston one and passes through the piston two to reach the inside of the pin. The top of the piston rod is movably connected to a locking block, an induction block is fixedly connected to the outer wall of the piston rod, and an air inlet one and an air inlet two are provided inside the housing.

[0012] Preferably, two locking blocks are provided in terms of quantity, and both locking blocks move along the spiral track on the piston rod. When the piston two moves downward, it drives the piston rod to move downward, and the two locking blocks move along the spiral track on the piston rod. Thus, the two locking blocks extend out of the pin, making the two locking blocks move flexibly.

[0013] Preferably, the air inlet one and the air inlet two are linearly spaced apart, there is a height difference between the air inlet one and the air inlet two, and the air inlet one and the air inlet two are connected to the chambers divided inside the housing.

[0014] Preferably, the air inlet one and the air inlet two are respectively connected to two different chambers. When the air inlet one is ventilated, the gas enters the chamber one and the chamber three. When the air inlet two is ventilated, the gas enters the chamber two and the chamber four. When the air inlet two is ventilated, the air flow enters the chamber two and the chamber four. At this time, the piston one and the piston two move downward respectively. When the air inlet one is ventilated, the chamber one and the chamber three are filled with compressed air, and the piston one and the piston two move upward. At this time, it is convenient for the pin to move.

[0015] Preferably, piston two is arranged inside the chamber one and the chamber two.

[0016] Preferably, piston one is arranged inside the chamber three and the chamber four. The piston one and the piston two move downward respectively. When the piston two moves downward, it drives the piston rod to move downward, and the two locking blocks move along the spiral track on the piston rod. Thus, the two locking blocks extend out of the pin. At the same time, the piston one drives the pin to move downward. If the piston one and the piston two move upward, the piston one moves upward to drive the pin to move upward, the piston two drives the piston rod to move upward, and the piston rod moving upward drives the two locking blocks to move along the spiral track of the piston rod. Thus, the two locking blocks retract inside the pin, enabling the locking blocks to complete the clamping and opening operations, facilitating the clamping operation.

[0017] In the above technical solutions, the technical effects and advantages provided by the present utility model are:

[0018] 1. The present utility model reduces the overall external dimension of the fixture and the gripper, making the overall volume small and occupying less space.

[0019] 2. High precision, ensuring the clamping and positioning accuracy of the tooling for the workpiece, and greatly guaranteeing the accuracy of the welding process.

[0020] 3. It has a self-locking function, effectively preventing the failure of the tooling in case of power failure and air supply interruption.

[0021] 4. Tolerance function, which can effectively clamp within the range of 0 - 10 mm of the workpiece thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic plan view of the internal connection structure of the present utility model;

[0024] Figure 2 It is a schematic side plan view of the present utility model;

[0025] Figure 3 It is a three-dimensional view of the external composition of the present utility model.

[0026] Description of the reference numerals:

[0027] 1. Pin; 2. Locking block; 3. Piston rod; 4. Support block; 5. Housing; 6. Sensor bracket; 7. Sleeve; 8. Induction block; 9. Piston I; 10. Sensor; 11. Piston II; 12. Lower cover; 13. Chamber I; 14. Chamber II; 15. Chamber III; 16. Chamber IV; 17. Air inlet I; 18. Air inlet II. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0029] The present utility model provides as Figures 1-3The shown parallel self-locking tolerance clamping cylinder includes a housing 5. A support block 4 is fixedly connected to the top of the housing 5. A lower cover 12 is fixedly connected to the bottom of the housing 5. A sensor bracket 6 is fixedly connected to the outer wall of the housing 5, and the sensor bracket 6 is fixedly connected to a sensor 10. A sleeve 7 is fixedly connected to the inside of the housing 5, and a pin 1 passes through the inside of the sleeve 7. A piston two 11 is arranged at the bottom of the pin 1, and a piston rod 3 is fixedly connected to the inside of the pin 1. The piston rod 3 is fixedly connected to a piston one 9 and passes through the piston two 11 to reach the inside of the pin 1. The top of the piston rod 3 is movably connected to a locking block 2. An induction block 8 is fixedly connected to the outer wall of the piston rod 3. An air inlet one 17 and an air inlet two 18 are opened inside the housing 5.

[0030] There are two locking blocks 2 in number, and both of the two locking blocks 2 move along the spiral track on the piston rod 3. When the piston two 11 moves downward, it drives the piston rod 3 to move downward. The two locking blocks 2 move along the spiral track on the piston rod 3. Thus, the two locking blocks 2 extend out of the pin 1, making the two locking blocks 2 move flexibly.

[0031] The air inlet one 17 and the air inlet two 18 are distributed at intervals in a line shape, and there is a height difference between the air inlet one 17 and the air inlet two 18. Also, the air inlet one 17 and the air inlet two 18 are communicated with the chambers divided inside the housing 5.

[0032] The air inlet one 17 and the air inlet two 18 are respectively communicated with two different chambers. When the air inlet one 17 is ventilated, gas enters the chamber one 13 and the chamber three 15. When the air inlet two 18 is ventilated, gas enters the chamber two 14 and the chamber four 16. When the air inlet two 18 is ventilated, the air flow enters the chamber two 14 and the chamber four 16. At this time, the piston one 9 and the piston two 11 move downward respectively. When the air inlet one 17 is ventilated, the chamber one 13 and the chamber three 15 are filled with compressed air, and the piston one 9 and the piston two 11 move upward. At this time, it is convenient for the pin 1 to move.

[0033] The piston two 11 is arranged inside the chamber one 13 and the chamber two 14.

[0034] The piston one 9 is arranged inside the chamber three 15 and the chamber four 16. The piston one 9 and the piston two 11 move downward respectively. When the piston two 11 moves downward, it drives the piston rod 3 to move downward. The two locking blocks 2 move along the spiral track on the piston rod 3. Thus, the two locking blocks 2 extend out of the pin 1. At the same time, the piston one 9 drives the pin 1 to move downward. If the piston one 9 and the piston two 11 move upward, the piston one 9 moving upward drives the pin 1 to move upward, the piston two 11 drives the piston rod 3 to move upward, and the piston rod 3 moving upward drives the two locking blocks 2 to move along the spiral track of the piston rod 3. Thus, the two locking blocks 2 retract to the inside of the pin 1, making the locking blocks 2 complete the clamping and opening operations, facilitating the clamping operation.

[0035] Working principle: When using the parallel self-locking tolerance clamping cylinder, first of all, the parallel self-locking tolerance clamping cylinder has two chambers in total. When the air inlet two 18 is ventilated, the air flow enters the chamber two 14 and the chamber four 16. At this time, the piston one 9 and the piston two 11 move downward respectively. When the piston two 11 moves downward, it drives the piston rod 3 to move downward. The two locking blocks 2 move along the spiral track on the piston rod 3. Then the two locking blocks 2 extend the pins 1. At the same time, the piston one 9 drives the pin 1 to move downward, thus completing the action of the locking block 2 clamping the workpiece in parallel. Since the clamping action of the parallel self-locking clamping cylinder is that the locking block 2 extends first, and then the pin 1 drives the locking block 2 to clamp the workpiece downward, the workpiece can be clamped in parallel within the range of 0 - 10 mm, and the tolerance function is relatively strong;

[0036] When the air inlet one 17 is ventilated, the chamber one 13 and the chamber three 15 are filled with compressed air. The piston one 9 and the piston two 11 move upward. The upward movement of the piston one 9 drives the pin 1 to move upward. The piston two 11 drives the piston rod 3 to move upward. And the upward movement of the piston rod 3 drives the two locking blocks 2 to move along the spiral track of the piston rod 3. Then the two locking blocks 2 retract to the inside of the pin 1, thus completing the opening action of the locking block 2. The sensing block 8 is fixedly connected to the piston rod 3 and senses with the sensor 10 at the locking and opening positions respectively. The sensor 10 emits locking or opening signals outward according to different positions.

[0037] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. Parallel self-locking tolerance clamping cylinder, comprising a housing (5), characterized in that, A support block (4) is fixedly connected to the top of the housing (5). A lower cover (12) is fixedly connected to the bottom of the housing (5). A sensor bracket (6) is fixedly connected to the outer wall of the housing (5), and the sensor bracket (6) is fixedly connected to a sensor (10). A sleeve (7) is fixedly connected to the inside of the housing (5), and a pin (1) is disposed through the inside of the sleeve (7). A second piston (11) is disposed at the bottom of the pin (1). A piston rod (3) is fixedly connected to the inside of the pin (1), and the piston rod (3) is fixedly connected to a first piston (9) and passes through the second piston (11) to reach the inside of the pin (1). A locking block (2) is movably connected to the top of the piston rod (3). An induction block (8) is fixedly connected to the outer wall of the piston rod (3). An air inlet one (17) and an air inlet two (18) are formed inside the housing (5).

2. The parallel self-locking tolerance clamping cylinder according to claim 1, wherein Two locking blocks (2) are provided, and both of the two locking blocks (2) move along a spiral track on the piston rod (3).

3. The parallel self-locking tolerance clamping cylinder according to claim 1, wherein, The air inlet one (17) and the air inlet two (18) are linearly spaced apart, there is a height difference between the air inlet one (17) and the air inlet two (18), and the air inlet one (17) and the air inlet two (18) are communicated with a chamber divided inside the housing (5).

4. The parallel self-locking tolerance clamping cylinder according to claim 1, characterized in that, The air inlet one (17) and the air inlet two (18) are respectively communicated with two different chambers. When the air inlet one (17) is ventilated, gas enters a first chamber (13) and a third chamber (15). When the air inlet two (18) is ventilated, gas enters a second chamber (14) and a fourth chamber (16).

5. The parallel self-locking tolerance clamping cylinder according to claim 4, wherein, A second piston (11) is disposed inside the first chamber (13) and the second chamber (14).

6. The parallel self-locking tolerance clamping cylinder according to claim 4, wherein A first piston (9) is disposed inside the third chamber (15) and the fourth chamber (16).

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