Pneumatic control device for hydraulic pump

Abstract

The utility model relates to the technical field of hydraulic pumps, in particular to a pneumatic control device for a hydraulic pump. According to the technical scheme, the hydraulic pump comprises a hydraulic pump body, pipelines are installed on the hydraulic pump body, a connecting shell is fixed between the pipelines, a rotating plate is rotationally connected into the connecting shell, the pipelines are of a two-section structure, the ends of the pipelines are located in the connecting shell, sealing ring plates are fixed to the ends of the pipelines, and the rotating plate is located between the sealing ring plates. The rotating plate is provided with a pair of communicating holes, and one-way valves are fixed in the communicating holes. By means of telescopic driving of the air cylinder, the rotating plate between the pipelines can be driven to rotate, the positions of the communicating holes provided with different one-way valves are converted, then it is guaranteed that the hydraulic cylinders in the pipelines can only flow in the designated reverse direction, and the risk that hydraulic oil flows back is reduced; and the one-way flowing direction of hydraulic oil in a pipeline can be controlled through conversion, and normal hydraulic cylinder telescopic driving control is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic pump technical field, concretely is a kind of pneumatic control device for hydraulic pump. BACKGROUND

[0002] Hydraulic pump is a kind of device that mechanical energy is converted into fluid pressure energy, it is the key power component in hydraulic system, and hydraulic pump generates mechanical movement in pump, makes hydraulic oil flow, and establishes pressure in system, to drive hydraulic cylinder, hydraulic motor and other execution elements to work.

[0003] Common hydraulic cylinder is provided with two pipelines, for the outflow and inflow of hydraulic oil, in this case, according to the extension of the controlled hydraulic cylinder, the flow direction of hydraulic oil in two pipelines will change, in this case, it cannot be provided with one-way flow protection element in pipeline, when hydraulic cylinder drives, if overload occurs, there is a high probability that hydraulic oil backflow occurs, and then accidental risk occurs, so a control device that can control the one-way flow of hydraulic oil according to the movement of control element is needed. UTILITY MODEL CONTENTS

[0004] The utility model is provided with a kind of pneumatic control device for hydraulic pump to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: including hydraulic pump main body, the hydraulic pump main body is installed with pipeline, connecting shell is fixed between the pipeline, the rotating plate is rotatably connected in the connecting shell, the pipeline is two section structure, the end of the pipeline is located in connecting shell and is fixed with sealing ring plate, the rotating plate is between sealing ring plate, a pair of communication holes are formed in the rotating plate, and one-way valve is fixed in communication hole, center shaft is rotatably connected in the center position of connecting shell, the center shaft passes through rotating plate and is fixedly connected with rotating plate, pneumatic sleeve is fixed in the connecting shell, pneumatic assembly that drives center shaft rotation is provided on the pneumatic sleeve.

[0006] Preferably, the pneumatic assembly includes a drive cylinder and a transmission gear, a sliding sleeve is slidably connected to the outside of the pneumatic sleeve, a drive tooth plate is fixed to the outer surface of the sliding sleeve, the transmission gear is fixed to the center shaft, and the position is aligned with the drive tooth plate, the drive tooth plate and the transmission gear are engaged.

[0007] Preferably, a drive block is slidably connected in the pneumatic sleeve, the drive block and the sliding sleeve are fixed by a connecting block, the drive cylinder is fixed to the end of the pneumatic sleeve, and the output end is fixed to the drive block.

[0008] Preferably, limit blocks are fixed to the two ends of the outside of the pneumatic sleeve, and the sliding sleeve is located between the limit blocks.

[0009] Preferably, the sealing ring plate is abutted with the upper and lower surfaces of the rotating plate respectively on one side, and is provided with a sealing gasket.

[0010] Preferably, the position of the communication hole is aligned with the pipeline, and the installation direction of the one-way valve in different communication holes is opposite.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the telescopic drive of the air cylinder can drive the rotating plate between the pipelines to rotate, the position of the communication hole with different one-way valves is converted, thereby ensuring that the hydraulic cylinder in the pipeline can only flow in the specified reverse direction, reducing the risk of backflow of hydraulic oil, and the one-way flow direction of the hydraulic oil in the pipeline can be controlled by conversion, without affecting the normal hydraulic cylinder telescopic drive control. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front cut structure schematic view of the utility model a kind of pneumatic control device for hydraulic pump;

[0013] Figure 2 It is a top view structure schematic view of the utility model a kind of pneumatic control device for hydraulic pump connecting shell;

[0014] Figure 3 It is a combination structure schematic view of the utility model a kind of pneumatic control device for hydraulic pump rotating plate and sealing ring plate;

[0015] Figure 4 It is a schematic view of the utility model a kind of pneumatic control device for hydraulic pump pneumatic sleeve internal structure.

[0016] In the drawing: 1, hydraulic pump main body;11, pipeline;12, sealing ring plate;2, connecting shell;3, rotating plate;31, communication hole;32, one-way valve;33, center rotating shaft;34, transmission gear;4, pneumatic sleeve;41, sliding sleeve;42, limit block;43, drive tooth plate;44, drive block;45, drive cylinder. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0018] Please refer to Figures 1-4The utility model provides a technical scheme: including hydraulic pump main body 1, the pipeline 11 is installed on hydraulic pump main body 1, and the connecting shell 2 is fixed between the pipeline 11, and the rotary plate 3 is rotatably connected in the connecting shell 2, the pipeline 11 is two section structure, and the sealing ring plate 12 is fixed in the connecting shell 2 in the end of pipeline 11, and the rotary plate 3 is between the sealing ring plate 12, a pair of communicating holes 31 are set up on the rotary plate 3, and the one-way valve 32 is fixed in communicating hole 31, and the center pivot 33 is rotatably connected in the center position of connecting shell 2, and the center pivot 33 passes through the rotary plate 3 and is fixedly connected with the rotary plate 3, and the pneumatic sleeve 4 is fixed in the connecting shell 2, and the pneumatic assembly that drives the center pivot 33 rotation is set up on the pneumatic sleeve 4, and the sealing ring plate 12 is close to one side respectively with the upper and lower surfaces of rotary plate 3, and all are provided with sealing pad, and the position of communicating hole 31 is aligned with the pipeline 11, and the installation direction of one-way valve 32 in different communicating holes 31 is opposite.

[0019] The pneumatic assembly includes drive cylinder 45 and transmission gear 34, the outer side of pneumatic sleeve 4 is slidably connected with sliding sleeve 41, the outer surface of sliding sleeve 41 is fixed with drive tooth plate 43, transmission gear 34 is fixed on the center pivot 33, and the position is aligned with drive tooth plate 43, drive tooth plate 43 and transmission gear 34 are engaged, drive block 44 is slidably connected in the pneumatic sleeve 4, and is fixed between drive block 44 and sliding sleeve 41 through connecting block, drive cylinder 45 is fixed on the end of pneumatic sleeve 4, and the output end is fixed on drive block 44, the outer side of pneumatic sleeve 4 is fixed with limit block 42 between both ends, and sliding sleeve 41 is located between limit block 42.

[0020] Working principle: first, the whole device is connected to external power supply, utilizes the telescoping of drive cylinder 45 output end, can drive drive block 44 to slide, further makes sliding sleeve 41 slide on the outer surface of pneumatic sleeve 4, finally drives drive tooth plate 43 synchronous sliding, at this moment, utilizes the transmission of transmission gear 34, drives center pivot 33 and rotary plate 3 to rotate, further makes the position of communicating hole 31 appear to exchange, is limited by one-way valve 32, and the hydraulic oil in pipeline 11 can only carry out one-way flow in opposite direction before and after exchange, no matter in driving piece extension or retraction, can avoid hydraulic oil backflow, and does not affect normal driving piece telescopic control, when sliding sleeve 41 slides, is limited by limit block 42, can make it slide in specified range between both ends, further can drive rotary plate 3 to rotate in specified angle, ensure that communicating hole 31 can be aligned with pipeline 11.

[0021] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0022] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A pneumatic control device for a hydraulic pump comprising a hydraulic pump body (1), characterized in that: The hydraulic pump body (1) is provided with pipelines (11), the connecting shell (2) is fixed between the pipelines (11), the rotating plate (3) is rotatably connected in the connecting shell (2), the pipeline (11) is in two sections, the pipeline (11) is fixed with the sealing ring plate (12) at the end in the connecting shell (2), the rotating plate (3) is located between the sealing ring plates (12), a pair of communication holes (31) are formed in the rotating plate (3), and the one-way valve (32) is fixed in the communication hole (31), the center shaft (33) is rotatably connected at the center position of the connecting shell (2), the center shaft (33) penetrates the rotating plate (3) and is fixedly connected with the rotating plate (3), the pneumatic sleeve (4) is fixed in the connecting shell (2), and the pneumatic assembly for driving the center shaft (33) to rotate is arranged on the pneumatic sleeve (4).

2. A pneumatic control device for a hydraulic pump according to claim 1, characterized in that: The pneumatic assembly comprises a driving cylinder (45) and a transmission gear (34), the sliding sleeve (41) is slidably connected outside the pneumatic sleeve (4), the driving tooth plate (43) is fixed on the outer surface of the sliding sleeve (41), the transmission gear (34) is fixed on the center shaft (33), and the position is aligned with the driving tooth plate (43), and the driving tooth plate (43) and the transmission gear (34) are engaged.

3. A pneumatic control device for a hydraulic pump according to claim 2, characterized in that: The driving block (44) is slidably connected in the pneumatic sleeve (4), the driving block (44) and the sliding sleeve (41) are fixed through the connecting block, and the driving cylinder (45) is fixed at the end of the pneumatic sleeve (4) and the output end is fixed on the driving block (44).

4. A pneumatic control device for a hydraulic pump according to claim 2, characterized in that: The limiting blocks (42) are fixed at the two ends outside the pneumatic sleeve (4), and the sliding sleeve (41) is located between the limiting blocks (42).

5. The pneumatic control device for a hydraulic pump according to claim 1, characterized by: The sealing gaskets are arranged on the upper and lower surfaces of the rotating plate (3) respectively.

6. A pneumatic control device for a hydraulic pump according to claim 1, characterized in that: The positions of the communication holes (31) are aligned with the pipelines (11), and the installation directions of the one-way valves (32) in different communication holes (31) are opposite.

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