Bidirectional hydraulic buffering and bidirectional mechanical limiting actuator with double gears and racks

Abstract

The invention relates to a double-gear-rack bidirectional hydraulic buffering bidirectional mechanical limiting actuator which comprises a limiting actuator body, piston cylinders, a buffering chamber, a blocking chamber, a mechanical adjusting limiting rod, a hydraulic throttling valve, a backflow pipe, a rack, a first split piston and a second split piston. Racks are symmetrically mounted on the inner wall between the piston barrel and the limiting actuator body, a second split piston is fixedly connected to the outer wall of one end of each rack, a buffer chamber is arranged between each second split piston and the piston barrel, and a blocking chamber is formed in the position, corresponding to the end of each second split piston, of the inner wall of one side of each buffer chamber; in the rack transmission process, the situation that lateral force is generated to abrade a piston sealing piece is avoided, the end of the actuator is buffered at multiple positions, fatigue damage to equipment is avoided, the operation burden of the equipment is reduced, and the using effect of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of actuators, in particular to a double rack and pinion bidirectional hydraulic buffering bidirectional mechanical limiting actuator. BACKGROUND

[0002] The limiting actuator is an integrated terminal execution component integrating power driving, action execution and stroke limiting protection, belonging to the fields of industrial automation, fluid transmission and mechanical transmission, and the core value is to complete power output such as pushing and pulling, swinging and rotating, while accurately restricting the movement stroke and preventing overrunning, and to balance action execution and equipment safety protection. However, in the rack transmission process of the existing limiting actuator, lateral force is easy to produce to wear the piston sealing element, and the end of the actuator is not easy to be buffered, which is easy to cause fatigue damage to the equipment, increases the operation burden of the equipment and reduces the use effect of the equipment. SUMMARY

[0003] The problem solved by the present application is to provide a double rack and pinion bidirectional hydraulic buffering bidirectional mechanical limiting actuator, which avoids the generation of lateral force to wear the piston sealing element in the rack transmission process, and buffers the end of the actuator at multiple places, avoids fatigue damage to the equipment, reduces the operation burden of the equipment and improves the use effect of the equipment.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a double rack and pinion bidirectional hydraulic buffering bidirectional mechanical limiting actuator, comprising a limiting actuator body, a piston cylinder, a buffer chamber, a blocking chamber, a mechanical adjusting limiting rod, a hydraulic throttle valve, a return pipe, a rack, a first split piston and a second split piston, the piston cylinder is installed on both sides of the limiting actuator body, the inner wall between the piston cylinder and the limiting actuator body is symmetrically installed with the rack, the outer wall of one end of the rack is fixedly connected with the second split piston, the buffer chamber is arranged between the second split piston and the piston cylinder, the inner wall of one side of the buffer chamber is provided with the blocking chamber corresponding to the end of the second split piston, the outer wall of the other end of the rack is fixedly connected with the first split piston, the mechanical adjusting limiting rod is installed in the piston cylinder corresponding to the position of the first split piston, the hydraulic throttle valve is installed on the piston cylinder, the return pipe is installed on both ends of the piston cylinder, and one end of the return pipe is installed through the inner wall of the limiting actuator body.

[0005] Preferably, a gear housing is installed on the limiting actuator body, a transmission gear is installed in the gear housing, and the outer side of the transmission gear is meshed and installed on the outer wall of the rack.

[0006] Preferably, a key groove is formed in the inner wall of the bottom end of the transmission gear.

[0007] The bottom end of the gear housing is preferably provided with connecting holes, and the number of the connecting holes is six.

[0008] The present application has the advantages that in the rack transmission process, the lateral force is avoided to wear the piston seal, and the end of the actuator is buffered at multiple positions, fatigue damage to the equipment is avoided, the operation burden of the equipment is reduced, and the use effect of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is a whole perspective view of the present application.

[0010] Fig. 2 It is a top view of the present application.

[0011] Fig. 3 It is a bottom perspective view of the present application.

[0012] LEGEND:

[0013] 1, limit actuator body; 2, piston cylinder; 3, buffer chamber; 4, blocking chamber; 5, mechanical adjusting limiting rod; 6, hydraulic throttle valve; 7, return pipe; 8, rack; 9, first split piston; 10, second split piston; 11, gear housing; 12, transmission gear; 13, keyway; 14, connecting hole. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0015] The specific embodiments are given below.

[0016] Reference is made to Figs. 1-3, double gear rack two-way hydraulic buffer two-way mechanical limiting actuator, including limiting actuator body 1, piston cylinder 2, buffer chamber 3, blocking chamber 4, mechanical adjusting limiting rod 5, hydraulic throttle valve 6, backflow pipe 7, rack 8, first split piston 9 and second split piston 10, the limiting actuator body 1 is installed on both sides of the piston cylinder 2, the inner wall between the piston cylinder 2 and the limiting actuator body 1 is symmetrically installed with the rack 8, one end of the outer wall of the rack 8 is fixedly connected with the second split piston 10, the buffer chamber 3 is arranged between the second split piston 10 and the piston cylinder 2, the blocking chamber 4 is formed in the inner wall of one side of the buffer chamber 3 corresponding to the end of the second split piston 10, the first split piston 9 is fixedly connected to the other end of the outer wall of the rack 8, the mechanical adjusting limiting rod 5 is installed in the piston cylinder 2 corresponding to the position of the first split piston 9, the hydraulic throttle valve 6 is installed on the piston cylinder 2, the backflow pipe 7 is installed on both ends of the piston cylinder 2, and one end of the backflow pipe 7 is installed through the inner wall of the limiting actuator body 1;

[0017] The limiting actuator body 1 is installed with a gear housing 11, the gear housing 11 is installed with a transmission gear 12, and the outer side of the transmission gear 12 is engaged and installed on the outer wall of the rack 8, the transmission gear 12 in the gear housing 11 is driven to rotate by the external driving structure, so that the racks 8 on both sides are reciprocatingly rotated;

[0018] The bottom end inner wall of the transmission gear 12 is provided with a key groove 13, which is convenient for limiting the key groove 13 on the transmission gear 12 and the external transmission structure to be clamped;

[0019] The bottom end of the gear housing 11 is provided with six connecting holes 14, the limiting actuator body 1 is placed in the specified position, then the connecting holes 14 are aligned, and then the bolt structure is installed in the connecting holes 14, which is convenient for fixing the position of the limiting actuator body 1.

[0020] Working principle: first, the limit executor body 1 is placed to the designated position, then the connecting hole 14 is aligned, then the bolt structure is installed in the connecting hole 14, the limit executor body 1 is fixed, then the key groove 13 on the transmission gear 12 is limited and clamped with the external transmission structure, under the action of the key groove 13, the transmission gear 12 in the gear shell 11 is driven to rotate by the external driving structure, then the rack 8 is limited by the supporting structure, so that the two racks 8 reciprocate, the second part piston 10 on one rack 8 moves along the buffer chamber 3 in the piston cylinder 2, when the second part piston 10 approaches the blocking chamber 4, then adjust the size of the hydraulic throttle valve 6, the hydraulic oil in the buffer chamber 2 is limited by the oil inlet pipeline of the hydraulic throttle valve 6, then the hydraulic oil is slowly injected into the blocking chamber 4, because the oil in the buffer chamber 2 exists, the second part piston 10 can be buffered, the first part piston 9 on the other rack 8 moves along the buffer chamber 3, the mechanical adjusting limit rod 5 on this side can also be adjusted to move, increase or reduce the hydraulic treatment of the buffer chamber 3 on this side, then the hydraulic throttle valve 6 is adjusted, the end of the limit executor body 1 is buffered, then the hydraulic oil enters the limit executor body 1 through the backflow pipe 7, so that the hydraulic oil is recycled, in the transmission process of the rack 8, the lateral force is avoided to wear the piston seal, and the end of the executor is buffered, avoiding fatigue damage to the equipment, reducing the operation burden of the equipment, and improving the use effect of the equipment.

[0021] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can replace or change the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A double-gear rack and pinion bidirectional hydraulic buffer bidirectional mechanical limit actuator, characterized in that, The actuator includes a limit actuator body (1), a piston cylinder (2), a buffer chamber (3), a blocking chamber (4), a mechanical adjusting limit rod (5), a hydraulic throttle valve (6), a return pipe (7), a rack (8), a first split piston (9), and a second split piston (10). Piston cylinders (2) are installed on both sides of the limit actuator body (1). Racks (8) are symmetrically installed on the inner wall between the piston cylinder (2) and the limit actuator body (1). A second split piston (10) is fixed to the outer wall of one end of the rack (8). The second split piston (10) is connected to the piston cylinder (9) and the piston cylinder (9). A buffer chamber (3) is provided between the piston cylinder (2). A blocking chamber (4) is provided on one side of the inner wall of the buffer chamber (3) corresponding to the end of the second split piston (10). A first split piston (9) is fixed on the outer wall of the other end of the rack (8). A mechanical adjustment limit rod (5) is installed in the piston cylinder (2) corresponding to the position of the first split piston (9). A hydraulic throttle valve (6) is installed on the piston cylinder (2). A return pipe (7) is installed at both ends of the piston cylinder (2), and one end of the return pipe (7) is installed through the inner wall of the limit actuator body (1).

2. The bidirectional hydraulic buffer bidirectional mechanical limit actuator with dual gear and rack as described in claim 1, characterized in that, The limit actuator body (1) is equipped with a gear housing (11), and a transmission gear (12) is installed inside the gear housing (11). The outer side of the transmission gear (12) is meshed with the outer wall of the rack (8).

3. The bidirectional hydraulic buffer bidirectional mechanical limit actuator with dual gear and rack as described in claim 2, characterized in that, A keyway (13) is provided on the inner wall of the bottom end of the transmission gear (12).

4. The bidirectional hydraulic buffer bidirectional mechanical limit actuator with double gear and rack as described in claim 2, characterized in that, The bottom end of the gear housing (11) is provided with connection holes (14), and there are six connection holes (14).

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