Locking positioning cylinder

Abstract

This utility model relates to a locking and positioning cylinder, including a cylinder body, a movable rod, a locking hole, a locking mechanism, and a pneumatic mechanism. The cylinder body has a movable rod at one end and a locking mechanism on its surface. The movable rod has a locking hole on its surface that cooperates with the locking mechanism. The pneumatic mechanism is installed on the cylinder body surface for dust removal from the movable rod surface. When the movable rod retracts, a push seat on the movable rod surface drives the push rod to move. The piston seat at the bottom of the push rod moves downwards within the sealed box. The piston seat surface has a rubber sealing sleeve that fits tightly against the inner wall of the sealed box, thereby pushing air below the sealing seat into the air pipe. The air pipe then enters the annular cavity within the annular seat. The annular cavity contains multiple inclined jet chambers. These inclined jet chambers spray airflow onto the movable rod surface to assist in dust removal. A protective net is provided at the top of the jet chambers so that external air entering the sealed box during the extension of the movable rod needs to be filtered.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic component technology, specifically a locking and positioning cylinder. Background Technology

[0002] In the field of industrial automation, locking and positioning cylinders, as key actuators for achieving precise locking of linear motion, are widely used in machining, logistics transportation, automated assembly, and other scenarios. Their core function is to fix the position of the cylinder's moving rod through a locking mechanism, ensuring that the equipment remains stable under specific operating conditions, such as workpiece clamping and position locking during process pauses.

[0003] In dusty workshop environments, traditional locking and positioning cylinders often face performance degradation due to dust pollution during actual operation. During the reciprocating extension and retraction of the cylinder rod, metal shavings, dust, fibers and other impurities easily adhere to the surface. If these impurities accumulate for a long time, they will aggravate the friction and wear between the moving rod and the cylinder body. Therefore, we need to provide a locking and positioning cylinder. Utility Model Content

[0004] The purpose of this utility model is to provide a locking and positioning cylinder. By setting an actuation mechanism, when the cylinder body drives the movable rod to retract, an airflow is generated to blow dust off the surface of the movable rod, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking and positioning cylinder, comprising:

[0006] The cylinder body comprises a movable rod, a locking hole, a locking mechanism, and a pneumatic mechanism. The movable rod is provided at one end of the cylinder body, and a locking mechanism is provided on its surface. A locking hole is provided on the surface of the movable rod to cooperate with the locking mechanism. The pneumatic mechanism is installed on the surface of the cylinder body for dust removal from the surface of the movable rod.

[0007] The pneumatic mechanism includes a sealing box, a push rod, a push seat, and a jet injector. The sealing box is fixed to the surface of the cylinder body, the push seat is fixed to the surface of the movable rod, and the push rod is fixedly installed on one side. The push rod is slidably installed in the sealing box and works in conjunction with the jet injector. The jet injector is used to spray gas onto the surface of the movable rod.

[0008] Preferably, the jet component includes an air pipe, a piston, an annular seat, and an air hole. The piston is located inside a sealing box and installed at the bottom of a push rod. An air pipe connects the sealing box and the annular seat. The air hole is located inside the annular seat and communicates with the air pipe.

[0009] Preferably, the air vent includes an annular cavity and a jet chamber. The annular cavity is formed inside an annular seat and has multiple jet chambers connected to its top. The jet chambers are configured as inclined surfaces. The annular cavity is connected to the exhaust end of the air pipe.

[0010] Preferably, the air inlet end of the air pipe is located at the bottom of the seal, and the air pipe is made of stainless steel.

[0011] Preferably, the piston component includes a piston seat and a sealing sleeve. The piston seat is fixed to the bottom of the push rod, and two sealing sleeves are fixedly installed on its surface. The outer edge of the sealing sleeve is tightly fitted to the inner wall of the sealing box, and the sealing sleeve is set as a rubber sleeve.

[0012] Preferably, the locking mechanism includes a rectangular seat, a circular groove, a locking rod, a ring, a spring, and a driving component. The rectangular seat is fixed to the surface of the cylinder body, and a locking rod is slidably installed inside it. A ring is fixedly installed on the surface of the locking rod. A circular groove for the movement of the ring is opened in the rectangular seat, and a spring is provided between the circular groove and the ring. A driving component for the movement of the locking rod is provided on one side of the cylinder body.

[0013] Preferably, the driving component includes a motor, a rocker arm, and a reserved slot. The motor is fixedly mounted on the surface of the cylinder body, and the rocker arm is mounted on the output end of the motor. The reserved slot on the surface of the rocker arm is hinged to one end of the locking rod.

[0014] Preferably, a conical seat is fixedly installed at one end of the locking rod, and a guide groove for sliding of the conical seat is provided on the surface of the movable rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention, by setting up a starting mechanism, can generate airflow to blow dust off the surface of the movable rod when the cylinder body drives the movable rod to retract. The dust removal action of this pneumatic mechanism is synchronized with the retraction process of the movable rod. The retraction of the movable rod is precisely the stage when its surface is most susceptible to external dust. At this time, the movable rod retracts from the external environment into the cylinder body, and the surface area exposed to dust gradually decreases, but the risk of residue is the highest. At this moment, the pneumatic mechanism actively sprays air, which can accurately remove impurities attached during the retraction process and prevent dust from accumulating on the sealing surface or in the locking mechanism after the movable rod completely retracts into the cylinder body. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a perspective view of the driving component of this utility model;

[0019] Figure 3 This is a perspective view of the locking mechanism of this utility model;

[0020] Figure 4 This is a three-dimensional sectional view of the pores of this utility model;

[0021] Figure 5 This is a three-dimensional sectional view of the sealing box of this utility model.

[0022] In the diagram: 1. Cylinder body; 2. Movable rod; 3. Locking hole; 4. Locking mechanism; 41. Rectangular seat; 42. Circular groove; 43. Locking rod; 44. Ring body; 45. Spring; 46. Driving component; 461. Motor; 462. Rocker arm; 463. Reserved groove; 5. Pneumatic mechanism; 51. Sealing box; 52. Push rod; 53. Push seat; 54. Jet jet component; 541. Air pipe; 542. Piston component; 5421. Sealing sleeve; 5422. Piston seat; 543. Annular seat; 544. Air hole; 5441. Annular cavity; 5442. Jet jet cavity; 6. Conical seat; 7. Guide groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a locking and positioning cylinder, comprising:

[0025] The cylinder body 1, movable rod 2, locking hole 3, locking mechanism 4 and pneumatic mechanism 5 are provided. The movable rod 2 is provided at one end of the cylinder body 1, and the locking mechanism 4 is provided on the surface. The surface of the movable rod 2 is provided with a locking hole 3 that is used to cooperate with the locking mechanism 4. The pneumatic mechanism 5 is installed on the surface of the cylinder body 1 and is used to remove dust from the surface of the movable rod 2.

[0026] The pneumatic mechanism 5 includes a sealing box 51, a push rod 52, a push seat 53, and a jet component 54. The sealing box 51 is fixed on the surface of the cylinder body 1, the push seat 53 is fixed on the surface of the movable rod 2, and the push rod 52 is fixedly installed on one side. The push rod 52 is slidably installed in the sealing box 51 and works in conjunction with the jet component 54. The jet component 54 is used to spray gas onto the surface of the movable rod 2.

[0027] Specifically, by setting up a starting mechanism, when the cylinder body 1 drives the movable rod 2 to retract, an airflow is generated to blow dust off the surface of the movable rod 2. The dust removal action of the pneumatic mechanism 5 is synchronized with the retraction process of the movable rod 2. When the movable rod 2 retracts, it is precisely the stage when its surface is most susceptible to external dust. At this time, the movable rod 2 retracts from the external environment into the cylinder body, and the surface area exposed to dust gradually decreases, but the risk of residue is the highest. At this moment, the pneumatic mechanism 5 actively sprays air, which can accurately remove the impurities attached during the retraction process and prevent dust from accumulating on the sealing surface or inside the locking mechanism 4 after the movable rod 2 completely retracts into the cylinder body.

[0028] The jet component 54 includes an air pipe 541, a piston component 542, an annular seat 543, and an air hole 544. The piston component 542 is located inside the sealing box 51 and is installed at the bottom of the push rod 52. The air pipe 541 is connected between the sealing box 51 and the annular seat 543. The air hole 544 is opened inside the annular seat 543 and is connected to the air pipe 541.

[0029] Furthermore, as the movable rod 2 returns to its original position, airflow is sprayed onto the surface of the movable rod 2 through the air hole 544 to remove surface dust.

[0030] The air vent 544 includes an annular cavity 5441 and a jet chamber 5442. The annular cavity 5441 is opened in the annular seat 543, and multiple jet chambers 5442 are connected to the top. The jet chambers 5442 are set as inclined surfaces. The annular cavity 5441 is connected to the exhaust end of the air pipe 541.

[0031] It should be noted that the angle of the inclined surface of the jet chamber 5442 is set to 30°-45°, and the diameter of the outlet end of the jet chamber 5442 gradually decreases along the airflow direction. The inclined surface design causes the airflow to blow obliquely towards the surface of the movable rod 2, forming a spiral blowing effect. Combined with the gradually narrowing outlet, it enhances the airflow impact force and improves the dust removal efficiency. The stainless steel guard can filter large particulate impurities in the air and prevent dust from entering the annular chamber 5441 when the air is drawn in the opposite direction. This solves the problems of uneven airflow coverage and backflow of impurities in direct injection. The guard is made of stainless steel woven mesh with a mesh diameter of 0.3-0.5mm. It is fixed to the top of the annular seat 543 and the mesh size is 80-100 mesh.

[0032] The air inlet end of the air pipe 541 is located at the bottom of the seal, and the air pipe 541 is made of stainless steel.

[0033] It is worth noting that stainless steel has the characteristics of high strength, corrosion resistance and high temperature resistance. Compared with plastic or ordinary metal air pipes 541, it can withstand repeated air pressure impacts when the pneumatic mechanism 5 is working, especially the instantaneous high-pressure airflow generated when the piston seat 5422 moves down. It is not easy to crack, deform or rust due to long-term use.

[0034] The piston component 542 includes a piston seat 5422 and a sealing sleeve 5421. The piston seat 5422 is fixed to the bottom of the push rod 52, and two sealing sleeves 5421 are fixedly installed on the surface. The outer edge of the sealing sleeve 5421 is tightly fitted to the inner wall of the sealing box 51, and the sealing sleeve 5421 is set as a rubber sleeve.

[0035] The locking mechanism 4 includes a rectangular seat 41, a circular groove 42, a locking rod 43, a ring 44, a spring 45, and a driving member 46. The rectangular seat 41 is fixed on the surface of the cylinder body 1, and the locking rod 43 is slidably installed inside it. The ring 44 is fixedly installed on the surface of the locking rod 43. A circular groove 42 for the movement of the ring 44 is opened in the rectangular seat 41, and a spring 45 is provided between the circular groove 42 and the ring. A driving member 46 for the movement of the locking rod 43 is provided on one side of the cylinder body 1.

[0036] It is worth noting that the spring 45 is made of piano wire with an initial preload of 50-80N; the inner wall of the circular groove 42 is provided with a grease layer, and the surface of the ring 44 is chrome-plated with a roughness Ra≤0.8μm. The piano wire spring 45 has a high elastic limit, ensuring that the locking rod 43 quickly engages the locking hole 3 under the action of the spring 45; the chrome-plated ring 44 and the grease work together to reduce sliding friction, making the locking action smoother and solving the problem of locking delay caused by fatigue failure of the spring 45 and excessive wear of the ring 44.

[0037] The driving component 46 includes a motor 461, a rocker arm 462 and a reserved groove 463. The motor 461 is fixedly mounted on the surface of the cylinder body 1. The rocker arm 462 is mounted on the output end of the motor 461, and the reserved groove 463 on the surface of the rocker arm 462 is hinged to one end of the locking rod 43.

[0038] Specifically, the hinge between the rocker arm 462 and the locking rod 43 uses a stainless steel pin, and the surface of the pin is coated with molybdenum disulfide. The length of the reserved groove 463 is 1.2 times the maximum moving distance of the locking rod 43, and the groove wall is rounded. The molybdenum disulfide coating reduces the coefficient of friction between the pin and the rocker arm 462 and the locking rod 43, reducing wear. The redundant length design of the reserved groove 463 avoids motion interference between the rocker arm 462 and the locking rod 43 when the rocker arm 462 rotates. The rounded groove wall prevents component breakage caused by stress concentration, thus solving the problems of easy wear and movement jamming at the hinge.

[0039] A tapered seat 6 is fixedly installed at one end of the locking rod 43, and a guide groove 7 for sliding of the tapered seat 6 is provided on the surface of the movable rod 2;

[0040] The locking rod 43 has a rounded end on its conical seat 6, and the inner ring of the rubber ring has a brush layer for mounting. The brush is made of nylon filaments and its length is adapted to the diameter of the locking rod 43. The rounded end design prevents the conical seat 6 from getting stuck in the guide groove 7. The trapezoidal guide groove 7 can guide the conical seat 6 to quickly align with the lock hole 3. The nylon brush layer automatically cleans the dust on the surface of the locking rod 43 when it extends and retracts, which solves the problem of jamming caused by impurities when the locking rod 43 and the lock hole 3 are engaged, and improves the locking accuracy.

[0041] The cylinder and motor 461, which consist of the cylinder body 1 and the moving rod 2 involved in this application, are all implemented using existing mature technologies and are connected to an external PLC controller and power supply. This is a conventional technical means in this field, so its specific circuit connection, control logic and working process will not be described in detail.

[0042] This device has a locking mechanism 4 on one side of the cylinder body 1, which works in conjunction with the locking hole 3 on the surface of the movable rod 2. When the movable rod 2 returns to its original position and retracts, under the action of the spring 45, the locking hole 3 on the surface of the movable rod 2 engages with one end of the locking rod 43, thereby achieving the effect of positioning and locking the movable rod 2. When the locking is released, the starting motor 461 drives the swing rod 462 at the output end to rotate. The pre-reserved groove 463 at one end of the swing rod 462 is hinged to one end of the locking rod 43, so that the locking rod 43 slides in the rectangular seat 41. As the locking rod 43 moves, it drives the ring 44 to move in the circular groove 42, which can compress the spring 45 and disengage one end of the locking rod 43 from the slot. At this time, the movable rod 2 can move freely and can stop driving the motor 461. Under the action of the spring 45, the conical seat 6 at one end of the locking rod 43 slides in the guide groove 7 on one side of the movable rod 2. When the slot moves to the side of the conical seat 6, the spring... 45. Insert the conical seat 6 into the slot, and a protective cover is provided on the surface of the motor 461. A rubber ring is provided on one side of the rectangular seat 41 to intercept dust on the surface of the locking rod 43. When the movable rod 2 returns to its original position and retracts, the push seat 53 on the surface of the movable rod 2 drives the push rod 52 to move. The piston seat 5422 at the bottom of the push rod 52 moves down inside the sealing box 51. The surface of the piston seat 5422 is provided with a rubber sealing sleeve 5421, which fits tightly against the inner wall of the sealing box 51, thereby pushing the air below the sealing seat into the air pipe 541. The air pipe 541 then enters the annular cavity 5441 inside the annular seat 543. The annular cavity 5441 is provided with multiple inclined jet chambers 5442. The inclined jet chambers 5442 spray air onto the surface of the movable rod 2 to assist in dust removal. A protective net is provided on the top of the jet chamber 5442. When the movable rod 2 extends, the external air entering the sealing box 51 needs to be filtered.

[0043] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking and positioning cylinder, characterized in that, include: The cylinder body (1), movable rod (2), locking hole (3), locking mechanism (4) and pneumatic mechanism (5) are provided. The cylinder body (1) is provided with movable rod (2) at one end and locking mechanism (4) on its surface. The movable rod (2) has a locking hole (3) on its surface that works with locking mechanism (4). The pneumatic mechanism (5) is installed on the surface of cylinder body (1) and is used to remove dust from the surface of movable rod (2). The pneumatic mechanism (5) includes a sealing box (51), a push rod (52), a push seat (53), and a jetting component (54). The sealing box (51) is fixed on the surface of the cylinder body (1), the push seat (53) is fixed on the surface of the movable rod (2), and the push rod (52) is fixedly installed on one side. The push rod (52) is slidably installed in the sealing box (51) and works in conjunction with the jetting component (54). The jetting component (54) is used to spray gas onto the surface of the movable rod (2).

2. A locking and positioning cylinder according to claim 1, characterized in that: The jet component (54) includes an air pipe (541), a piston component (542), an annular seat (543), and an air hole (544). The piston component (542) is located inside the sealing box (51) and is installed at the bottom of the push rod (52). The air pipe (541) is connected between the sealing box (51) and the annular seat (543). The air hole (544) is opened inside the annular seat (543) and is connected to the air pipe (541).

3. A locking and positioning cylinder according to claim 2, characterized in that: The air vent (544) includes an annular cavity (5441) and a jet chamber (5442). The annular cavity (5441) is opened in the annular seat (543), and the top is connected to multiple jet chambers (5442). The jet chambers (5442) are set as inclined surfaces. The annular cavity (5441) is connected to the exhaust end of the air pipe (541).

4. A locking and positioning cylinder according to claim 3, characterized in that: The air inlet of the air pipe (541) is located at the bottom of the seal, and the air pipe (541) is made of stainless steel.

5. A locking and positioning cylinder according to claim 4, characterized in that: The piston component (542) includes a piston seat (5422) and a sealing sleeve (5421). The piston seat (5422) is fixed to the bottom of the push rod (52), and two sealing sleeves (5421) are fixedly installed on its surface. The outer edge of the sealing sleeve (5421) is tightly fitted to the inner wall of the sealing box (51), and the sealing sleeve (5421) is set as a rubber sleeve.

6. A locking and positioning cylinder according to claim 1, characterized in that: The locking mechanism (4) includes a rectangular seat (41), a circular groove (42), a locking rod (43), a ring (44), a spring (45), and a driving member (46). The rectangular seat (41) is fixed on the surface of the cylinder body (1), and the locking rod (43) is slidably installed inside. The ring (44) is fixedly installed on the surface of the locking rod (43). A circular groove (42) for the movement of the ring (44) is opened in the rectangular seat (41), and a spring (45) is provided between the circular groove (42) and the ring. A driving member (46) for the movement of the locking rod (43) is provided on one side of the cylinder body (1).

7. A locking and positioning cylinder according to claim 6, characterized in that: The drive component (46) includes a motor (461), a rocker arm (462), and a reserved slot (463). The motor (461) is fixedly installed on the surface of the cylinder body (1). The rocker arm (462) is installed at the output end of the motor (461), and the reserved slot (463) on the surface of the rocker arm (462) is hinged to one end of the locking rod (43).

8. A locking and positioning cylinder according to claim 7, characterized in that: The locking rod (43) has a tapered seat (6) fixedly installed at one end, and the movable rod (2) has a guide groove (7) for sliding of the tapered seat (6) on its surface.

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