Oil delivery pump and oil supply mechanism

Abstract

The utility model relates to the technical field of oil delivery pumps, and particularly discloses an oil delivery pump and an oil supply mechanism, the oil delivery pump comprises a pump body, a driving piece, a sealing piece and an elastic piece, the pump body is provided with an oil inlet, an oil return port and an oil supply port, an oil inlet flow channel is arranged between the oil inlet and the oil supply port, an oil return flow channel is arranged between the oil return port and the oil supply port, and the elastic piece is arranged on the driving piece. The driving part is fixed to the pump body and used for pumping oil from the oil inlet and conveying the oil to the oil supply port, elastic force is applied to the sealing part through the elastic part, the sealing part elastically seals the oil return flow channel, and when the die is in the pressure maintaining state, the pressure of the oil supply port and the pressure of the die are kept consistent. As long as the oil pressure of the oil supply port is larger than the pressure applied by the elastic piece, oil can drive the sealing piece to move, open the oil return flow channel and relieve pressure, the pressure maintaining force can be controlled not to exceed the preset value in real time through the elastic piece and the sealing piece, the pressure maintaining effect can be improved, and the safety risk can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil transfer pump and particularly relates to an oil transfer pump and oil supply mechanism. BACKGROUND

[0002] In the working process of the mold, the oil supply equipment is generally used to supply oil to the mold to realize the actions of mold clamping, pressure maintaining and mold opening. The conventional oil supply equipment generally refers to an oil pump. The oil pump is used to draw hydraulic oil in an oil tank and deliver the hydraulic oil to a control oil cylinder of the mold. The control oil cylinder is used to drive the mold to act. The conventional oil pump has an oil inlet flow channel and an oil return flow channel. In the mold clamping and pressure maintaining stage, the oil inlet flow channel is used to draw in the hydraulic oil. In the mold opening stage, the oil return flow channel is used to discharge the hydraulic oil.

[0003] For the pressure maintaining stage, the oil pump is also used to supply hydraulic oil to the mold. The amount of the hydraulic oil supplied by the oil pump determines the pressure maintaining force of the mold. However, if the pressure maintaining force exceeds the preset value, the hydraulic oil cannot be discharged by the oil pump. The hydraulic oil can only be discharged after the pressure maintaining is completed. The excessive pressure maintaining force also affects the pressure maintaining effect of the mold. However, the existing oil pump cannot control the maximum pressure maintaining value of the mold, which may even cause a safety risk. SUMMARY

[0004] The utility model considers the foregoing problem and is made. The utility model aims at providing an oil transfer pump and oil supply mechanism, which can automatically adjust the pressure maintaining force, improve the pressure maintaining effect and reduce the safety risk.

[0005] To achieve the above object, the utility model provides an oil transfer pump for supplying oil to a mold, which comprises:

[0006] A pump body is provided with an oil inlet, an oil return port and an oil supply port. An oil inlet flow channel is arranged between the oil inlet and the oil supply port. An oil return flow channel is arranged between the oil return port and the oil supply port.

[0007] A driving member is fixed on the pump body and is used to draw oil from the oil inlet and deliver the oil to the oil supply port.

[0008] A sealing member and an elastic member are adapted to each other. The sealing member is movably arranged in the oil return flow channel. The sealing member has a first position for sealing the oil return flow channel and a second position for communicating the oil return flow channel. One end of the elastic member is connected to the inner wall of the pump body. The other end of the elastic member abuts against the sealing member to drive the sealing member to remain in the first position.

[0009] The oil delivery pump is characterized in that the pump body is provided with an oil supply area, the oil supply area is in communication with the oil supply port, the oil inlet flow channel and the oil return flow channel, a first one-way valve is arranged at the connection between the oil inlet flow channel and the oil supply area, one end of the first one-way valve is located in the oil inlet flow channel, the other end of the first one-way valve is located in the oil supply area, and the opening of the first one-way valve faces the oil supply area.

[0010] The oil delivery pump is characterized in that the sealing member is a sealing cylinder, one end of the sealing cylinder is located in the oil return flow channel, the other end of the sealing cylinder is located in the oil supply area, and a first flow channel for connecting the oil supply area and the oil return flow channel is arranged in the middle of the sealing cylinder, when the sealing cylinder is located at the first position, the one end of the sealing cylinder can abut against the end of the first one-way valve to seal the first flow channel.

[0011] The oil delivery pump is characterized in that the one end of the sealing cylinder located in the oil supply area extends outward to form a limiting portion, and the diameter of the limiting portion is greater than the diameter of the oil return flow channel.

[0012] The oil delivery pump is characterized in that the first one-way valve is provided with an inclined avoiding portion near the one end of the sealing cylinder to expose the end of the sealing cylinder.

[0013] The oil delivery pump is characterized in that the elastic member includes a spring and a driving block, one end of the spring is connected to the inner wall of the pump body, the other end of the spring is connected to the driving block and is in a compressed state, and one end of the driving block can abut against the one end of the sealing cylinder located in the oil return flow channel to drive the sealing cylinder to remain at the first position.

[0014] The oil delivery pump is characterized in that the pump body is provided with an oil supply area, the oil supply area is in communication with the oil supply port, the oil inlet flow channel and the oil return flow channel, a first one-way valve is arranged at the connection between the oil inlet flow channel and the oil supply area, one end of the first one-way valve is located in the oil inlet flow channel, the other end of the first one-way valve is located in the oil supply area, and the opening of the first one-way valve faces the oil supply area.

[0015] The oil delivery pump is characterized in that the one end of the sealing cylinder located in the oil supply area extends outward to form a limiting portion, and the diameter of the limiting portion is greater than the diameter of the oil return flow channel.

[0016] The oil inlet flow channel comprises a first sub-flow channel arranged in a vertical direction and a second sub-flow channel arranged in a horizontal direction, one end of the first sub-flow channel is communicated with the oil inlet, the other end of the first sub-flow channel is connected with one end of the second sub-flow channel, the end of the second sub-flow channel away from the first sub-flow channel is communicated with the oil supply area, and the driving member is located at the connection position of the first sub-flow channel and the second sub-flow channel.

[0017] The first sub-flow channel is provided with a second one-way valve with an opening facing the second sub-flow channel, and one end of the first one-way valve is arranged in the second sub-flow channel.

[0018] An oil supply mechanism comprises:

[0019] The oil supply pump as described above;

[0020] An oil storage container located below the oil supply pump;

[0021] An oil inlet pipe and an oil return pipe, one end of the oil inlet pipe is inserted into the oil inlet, the other end of the oil inlet pipe is located in the oil storage container, one end of the oil return pipe is inserted into the oil return outlet, and the other end of the oil return outlet is located in the oil storage container.

[0022] The utility model has the following beneficial effects:

[0023] 1. The elastic force of the elastic member is applied to the sealing member to realize elastic sealing of the oil return flow channel. When the mold is in the pressure maintaining state, the pressure of the oil supply port is consistent with the pressure of the mold. As long as the oil pressure of the oil supply port is greater than the pressure applied by the elastic member, the oil can drive the sealing member to displace and open the oil return flow channel, and the pressure relief is realized. The preset value of the pressure maintaining force can be controlled in real time by the elastic member and the sealing member, the pressure maintaining effect can be improved, and the safety risk can be reduced.

[0024] 2. One end of the spring is connected with the adjusting screw, the position of the spring can be adjusted by the adjusting screw, the compression amount of the spring can be adjusted, and the upper limit of the pressure maintaining force can be adjusted.

[0025] 3. An inclined avoiding portion is arranged on the end of the first one-way valve close to the sealing cylinder. The end of the sealing cylinder can be exposed through the avoiding portion, and the oil pressure is applied to the sealing cylinder to drive the horizontal movement of the sealing cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is a schematic diagram of the overall structure appearance of the embodiment.

[0027] Fig. 2 It is a sectional view of the overall structure of the embodiment.

[0028] In the drawings:

[0029] 1, pump body; 11, oil inlet; 12, oil return port; 13, oil supply port; 14, oil supply area; 15, first check valve; 151, avoidance; 16, second check valve; 2, drive; 3, sealing tube; 31, first flow channel; 32, limiting part; 4, elastic member; 41, spring; 42, drive block; 421, sealing part; 5, adjusting screw; 6, oil storage container; 7, oil inlet pipe; 8, oil return pipe. DETAILED DESCRIPTION

[0030] The following is a specific embodiment of the utility model and combining the drawings, the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0031] As Figs. 1-2 shown, an oil pump, comprising a pump body 1, drive 2, sealing member and elastic member 4 are adapted to each other, the oil pump is used for oil supply for mold, for the mold, the mold, the mold and other actions such as pressure maintaining provide hydraulic oil.

[0032] Among them, the oil inlet 11, the oil return port 12 and the oil supply port 13 are arranged on the pump body 1, the oil inlet 11 and the oil supply port 13 are arranged between the oil inlet channel, the oil return port 12 and the oil supply port 13 are arranged between the oil return channel, and the drive 2 is fixed on the pump body 1, for drawing oil from the oil inlet 11, and transported to the oil supply port 13, that is, the drive 2 is located on one side of the oil inlet channel, which can be through the manufacturing air pressure pressure difference to draw the oil outside the oil inlet 11 into the oil inlet channel, and then through the oil inlet channel to deliver the oil to the oil supply port 13, and the oil supply port 13 can provide oil for the control cylinder for driving the mold, and then realize the mold, the mold and other actions such as pressure maintaining.

[0033] In this embodiment, the drive 2 is the drive piston and other components of the conventional pneumatic pump, which can realize the extraction of oil by controlling the air pressure. Since the drive structure is consistent with the conventional pneumatic pump, it is not repeated in this embodiment.

[0034] In the embodiment, the seal is movably arranged in the oil return flow channel, and the seal has a first position for sealing the oil return flow channel and a second position for communicating the oil return flow channel. One end of the elastic member 4 is in contact with the inner wall of the pump body 1, and the other end of the elastic member 4 is in contact with the seal. The elastic member 4 is in a compressed state, and an elastic force is provided on the seal. The elastic force can drive the seal to remain in the first position, so as to maintain the state of sealing the oil return flow channel. When the oil return flow channel is in the sealed state, the hydraulic oil flowing into the oil inlet flow channel can flow out from the oil supply port 13. When the mold is in the pressure maintaining state, the oil pressure at the oil supply port 13 will continuously increase. Once the oil pressure exceeds the elastic force, the seal will be driven to move towards the second position, the oil return flow channel is opened, and the oil at the oil supply port 13 can be discharged from the oil return flow channel, so as to achieve the purpose of automatic pressure relief, control the maximum pressure maintaining force, improve the pressure maintaining effect, and reduce the safety risk.

[0035] Specifically, the pump body 1 is provided with an oil supply area 14, which is in communication with the oil supply port 13, the oil inlet flow channel and the oil return flow channel. The connection between the oil inlet flow channel and the oil supply area 14 is provided with a first one-way valve 15. One end of the first one-way valve 15 is located in the oil inlet flow channel, and the other end of the first one-way valve 15 is located in the oil supply area 14. The opening of the first one-way valve 15 faces the oil supply area 14, that is, the oil flowing into the oil inlet flow channel can flow into the oil supply area 14 through the oil inlet flow channel. Due to the existence of the first one-way valve 15, the oil cannot flow back into the oil inlet flow channel. In the case that the oil return flow channel is blocked, the oil can only be transmitted out through the oil supply port 13.

[0036] In order to keep the seal in the first position, the seal is provided as a sealing cylinder 3. One end of the sealing cylinder 3 is located in the oil return flow channel, and the other end of the sealing cylinder 3 is located in the oil supply area 14. A first flow channel 31 for communicating the oil supply area 14 and the oil return flow channel is arranged in the middle of the sealing cylinder 3. When the sealing cylinder 3 is in the first position, one end of the sealing cylinder 3 can be in contact with the end of the first one-way valve 15 to seal the first flow channel 31. The elastic member 4 is in contact with the end of the sealing cylinder 3 away from the first one-way valve 15. The elastic member 4 drives the sealing cylinder 3 to move towards the side close to the first one-way valve 15 until the sealing cylinder 3 is in contact with the first one-way valve 15, that is, the sealing cylinder 3 is in the first position and performs sealing. When the sealing cylinder 3 is in the second position, the sealing cylinder 3 is out of contact with the first one-way valve 15, and the first flow channel 31 is exposed, so as to realize the communication between the oil supply area 14 and the oil return flow channel.

[0037] In order to prevent the sealing cylinder 3 from moving to the oil supply area 14, a limiting portion 32 is formed outwardly around one end of the sealing cylinder 3 located in the oil supply area 14, and the diameter of the limiting portion 32 is larger than the diameter of the oil return flow channel. Since the flow direction of the oil is from the oil supply area 14 to the oil return flow channel, the oil flow will drive the sealing cylinder 3 to move to the side. The limiting portion 32 limits the maximum distance of the movement of the sealing cylinder 3 to the side, thereby preventing the sealing cylinder 3 from moving out of the oil supply area 14 and ensuring that the sealing cylinder 3 works in a relatively stable range. Of course, during the movement of the sealing cylinder 3 driven by the elastic force in the opposite direction, the first one-way valve 15 can limit the movement of the sealing cylinder 3 to prevent excessive movement.

[0038] In order to enable the sealing cylinder 3 to be driven by the horizontal oil pressure, in the embodiment, the sealing cylinder 3 is inserted in the horizontal direction into the oil return flow channel, and thus the sealing cylinder 3 needs to be driven by the horizontal oil pressure to be displaced. Therefore, an inclined avoiding portion 151 is arranged on the end of the first one-way valve 15 close to the sealing cylinder 3. The avoiding portion 151 can expose the end of the sealing cylinder 3, so that the end of the sealing cylinder 3 is subjected to the pressure of the oil. When the pressure exceeds the elastic force provided by the elastic member 4, the sealing cylinder 3 can be driven to move horizontally.

[0039] Specifically, the elastic member 4 includes a spring 41 and a driving block 42. One end of the spring 41 is connected to the inner wall of the pump body 1, and the other end of the spring 41 is connected to the driving block 42 and is in a compressed state. One end of the driving block 42 can abut against the end of the sealing cylinder 3 located in the oil return flow channel to drive the sealing cylinder 3 to remain in the first position. The elastic force provided by the spring 41 acts on the driving block 42 to drive the sealing cylinder 3 to be displaced.

[0040] In the embodiment, the driving block 42 includes a first block and a second block. The diameter of the first block is larger than the diameter of the second block. The first block is located between the second block and the spring 41. The difference in the diameters is mainly used to change the diameter of the channel in the valve body.

[0041] In order to adjust the elastic force of the spring 41 to meet the requirements of different pressure maintaining forces, an adjusting screw 5 is arranged. The adjusting screw 5 is movably fixed to the end of the pump body 1. One end of the adjusting screw 5 can extend into the pump body 1 and can move towards or away from the driving block 42. One end of the spring 41 is connected to the adjusting screw 5, and the other end of the spring 41 abuts against the end of the driving block 42 away from the sealing cylinder 3. During the displacement of the adjusting screw 5, the adjusting screw 5 can adjust the compression amount of the spring 41, thereby adjusting the elastic force of the spring 41. According to the pressure maintaining force requirement of the mold, the opening pressure of the sealing cylinder 3 can be adjusted.

[0042] In the embodiment, the adjusting screw 5 can be screwed with the end of the pump body 1, and the translation between the adjusting screw 5 and the pump body 1 can be realized by rotating. Of course, other ways such as clamping by interference fit can also be used to realize the translation of the adjusting screw 5.

[0043] Specifically, the end face of the sealing cylinder 3 close to the driving block 42 is provided as an arc-shaped convex surface, the middle part of the end of the driving block 42 close to the sealing cylinder 3 is provided as a sealing part 421, and the sealing part 421 can abut against the arc-shaped surface to seal the first flow channel 31. When the driving force of the oil can overcome the elastic force of the spring 41, the sealing cylinder 3 is first displaced, and after the first flow channel 31 is opened, the oil enters the first flow channel 31. Due to the abutment of the driving block 42, the oil must first drive the driving block 42 away from the sealing cylinder 3. At this time, the end face of the sealing cylinder 3 close to the driving block 42 is provided as an arc-shaped surface, which facilitates the outflow of the hydraulic oil in the first flow channel 31 to the oil return flow channel.

[0044] The design of sealing the first flow channel 31 by the driving block 42 can not only meet the abutment condition as described above, but also prevent the occurrence of oil backflow, i.e., the oil entering the oil return flow channel cannot return to the oil supply area 14 through the first flow channel 31.

[0045] Specifically, the oil inlet flow channel includes a first sub-flow channel arranged in the vertical direction and a second sub-flow channel arranged in the horizontal direction. The lower end of the first sub-flow channel is in communication with the oil inlet port 11, the upper end of the first sub-flow channel is connected to one end of the second sub-flow channel, the end of the second sub-flow channel away from the first sub-flow channel is in communication with the oil supply area 14, and the driving member 2 is located at the connection between the first sub-flow channel and the second sub-flow channel. The driving member 2 draws oil up through the first sub-flow channel and then delivers the oil to the oil supply area 14 through the second sub-flow channel. A second one-way valve 16 is arranged in the first sub-flow channel and opens towards the second sub-flow channel, and one end of the first one-way valve 15 is arranged in the second sub-flow channel, further ensuring the flow direction of the oil and avoiding the phenomenon of backflow in the first sub-flow channel.

[0046] An oil supply mechanism includes the oil delivery pump as described above, an oil storage container 6, an oil inlet pipe 7, and an oil return port 12. The oil outlet container is located below the oil delivery pump, one end of the oil inlet port 11 is inserted into the oil inlet port 11, the other end of the oil inlet pipe 7 is located in the oil storage container 6, one end of the oil return pipe 8 is inserted into the oil return port 12, and the other end of the oil return port 12 is located in the oil storage container 6. The oil is sucked by the oil inlet pipe 7, and the oil is returned by the oil return pipe 8.

[0047] The technical solutions of the present application are described in detail above with reference to the drawings, and the described embodiments are used to help understand the idea of the present application. The specific embodiments described herein are merely exemplary of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

Claims

1. An oil transfer pump for supplying oil to a mold, characterized by, The utility model relates to a pump body, the oil inlet, the oil return and the oil supply are arranged on the pump body, the oil inlet and the oil supply are connected by the oil inlet channel, the oil return and the oil supply are connected by the oil return channel, the drive part is fixed on the pump body, and the drive part is used to draw the oil from the oil inlet and is transported to the oil supply, the sealing piece and the elastic piece are matched with each other, the sealing piece is movably arranged in the oil return channel, the sealing piece has the first position of sealing the oil return channel and the second position of communicating the oil return channel, one end of the elastic piece is connected with the inner wall of the pump body, the other end of the elastic piece is abutted with the sealing piece to drive the sealing piece to keep in the first position. The pump body is provided with an oil supply area, the oil supply area is communicated with the oil supply, the oil inlet channel and the oil return channel, the connection part of the oil inlet channel and the oil supply area is provided with a first one-way valve, one end of the first one-way valve is located in the oil inlet channel, the other end of the first one-way valve is located in the oil supply area, and the opening of the first one-way valve faces the oil supply area. The sealing piece is a sealing cylinder, one end of the sealing cylinder is located in the oil return channel, the other end of the sealing cylinder is located in the oil supply area, and the middle part of the sealing cylinder is provided with a first channel for communicating the oil supply area and the oil return channel, when the sealing cylinder is located in the first position, one end of the sealing cylinder can be abutted with the end of the first one-way valve to seal the first channel. One end of the sealing cylinder located in the oil supply area extends outward to form a limiting part, and the diameter of the limiting part is greater than the diameter of the oil return channel.

2. The fuel delivery pump of claim 1 wherein, The first one-way valve is provided with an inclined avoiding part on one end close to the sealing cylinder to expose the end of the sealing cylinder.

3. A fuel pump according to claim 2, wherein The elastic piece includes a spring and a driving block, one end of the spring is connected with the inner wall of the pump body, the other end of the spring is connected with the driving block and is in a compressed state, and one end of the driving block can be abutted with one end of the sealing cylinder located in the oil return channel to drive the sealing cylinder to keep in the first position.

4. A fuel delivery pump as claimed in claim 3, wherein The utility model also includes an adjusting screw, the adjusting screw is movably fixed on the end of the pump body, one end of the adjusting screw can be inserted into the pump body and can move towards or away from the side of the driving block, one end of the spring is connected with the adjusting screw, and the other end of the spring is abutted with one end of the driving block away from the sealing cylinder.

5. The fuel pump of claim 3, wherein One end face of the sealing cylinder close to the driving block is an outward convex arc surface, the middle part of one end of the driving block close to the sealing cylinder is provided with a sealing part, the sealing part can be abutted with the arc surface to seal the first channel.

6. The fuel pump of claim 3, wherein The oil inlet channel includes a first sub-channel arranged in the vertical direction and a second sub-channel arranged in the horizontal direction, one end of the first sub-channel is communicated with the oil inlet, the other end of the first sub-channel is connected with one end of the second sub-channel, one end of the second sub-channel away from the first sub-channel is communicated with the oil supply area, and the driving part is located at the connection part of the first sub-channel and the second sub-channel.

7. A fuel delivery pump as claimed in claim 6, wherein ​ 8. The fuel pump of claim 6, wherein ​ 9. The fuel pump of claim 2, wherein ​ The first shunt channel is provided with a second one-way valve with an opening facing the second shunt channel, and one end of the first one-way valve is arranged in the second shunt channel.

10. An oil supply mechanism characterized by comprising: Comprise: The oil delivery pump according to any one of claims 1-9; An oil storage container is arranged below the oil delivery pump; An oil inlet pipe and an oil return pipe, one end of the oil inlet pipe is arranged in the oil inlet, the other end of the oil inlet pipe is arranged in the oil storage container, one end of the oil return pipe is arranged in the oil return, and the other end of the oil return pipe is arranged in the oil storage container.

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