Hydraulic tool

Abstract

The utility model belongs to the technical field of hydraulic tools, and particularly relates to a hydraulic tool which comprises a mold frame, an oil supply pump body, an oil bag and a driving mechanism, an oil pumping cavity, an oil pumping channel and an oil return channel are formed in the oil supply pump body, the oil pumping channel and the oil return channel are communicated with the oil pumping cavity, and the oil bag is installed on the oil supply pump body and communicated with the oil pumping channel and the oil return channel. The driving mechanism is installed on one side of the oil supply pump body and used for driving hydraulic oil to enter the oil pumping cavity from the oil bag through the oil pumping channel, the oil supply pump body is further provided with a pressure relief counter bore communicated with the backflow oil channel, and a first ball and a pressing switch used for driving the first ball to block or conduct the backflow channel are installed in the pressure relief counter bore. An existing pump body and an oil bag base are integrally formed, the requirement for sealing performance is reduced, machining convenience is improved, pressure relief in an oil return channel is achieved in a switch pressing mode, and convenience of pressure relief and oil return is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic tools, and in particular relates to a hydraulic tool. Background Art

[0002] Hydraulic tools use liquid (mainly oil) as a medium for transmitting power, and achieve energy conversion and transmission through pressure changes in a closed container. This type of tool has a simple structure, high efficiency, and is easy to use, so it is widely used in many industries such as construction, aviation, and automobiles.

[0003] For example, Chinese patent application No. (CN202222735482.8) discloses an oil supply assembly of a hydraulic tool and its hydraulic tool, including an oil supply assembly installed on the outer side of a pump body of the hydraulic tool, and including an oil bag and an oil bag seat, a hydraulic oil circuit is arranged in the oil bag seat, and the hydraulic oil circuit includes a one-way oil suction hole, a plunger hole, an oil outlet hole and a pressure relief hole; the one-way oil suction hole is connected with the plunger hole through a first cavity, and the first cavity and the oil outlet hole are connected; an oil suction one-way valve is installed in the one-way oil suction hole, a plunger assembly is installed in the plunger hole, a one-way valve assembly is arranged between the first cavity and the oil outlet hole, the pressure relief hole is connected with the oil outlet hole, and the pressure relief component seals the pressure relief hole; wherein, the oil bag seat and the pump body of the application are split, which increases the requirements for sealing performance, and its pressure relief component adopts a rotating manner to relieve pressure, which cannot be operated with one hand, and the convenience needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic tool to solve the above-mentioned technical problems, so as to achieve the effect of integrally forming the oil bag seat and the pump body, and releasing the pressure by pressing, thereby improving the convenience.

[0005] In view of this, the utility model provides a hydraulic tool, comprising:

[0006] Formwork;

[0007] The oil supply pump body is installed on one side of the mold frame, and is provided with an oil pump cavity on the side close to the mold frame, and is provided with an oil pump passage and an oil return passage communicating with the oil pump cavity;

[0008] The oil bag is installed on one side of the oil supply pump body, and the pump oil passage and the return oil passage are both connected to the oil bag;

[0009] The driving mechanism is installed on one side of the oil supply pump body and is used to drive the hydraulic oil from the oil bag into the pump oil cavity through the pump oil passage;

[0010] Among them, a pressure relief counterbore connected to the return oil passage is opened on one side of the oil supply pump body close to the return oil passage, and a first ball and a push switch for driving the first ball to block or open the return oil passage are installed in the pressure relief counterbore.

[0011] In the above technical solution, further, the push switch includes:

[0012] The valve seat is mounted on the inner wall of the pressure relief counterbore, and the return oil passage includes a first return section and a second return section located on both sides of the valve seat in the axial direction, and a through hole is axially opened on the valve seat;

[0013] A top column is slidably installed in the pressure relief counterbore, and one end forms a top head adapted to the through hole, and the other end extends out of the pressure relief counterbore to form a pressing head;

[0014] A first spring is sleeved on the surface of the top head and is located between the top column and the valve seat;

[0015] A limit ring is sleeved on the surface of the pressing head and connected to the inner wall of the pressure relief counterbore, and is used to limit the top column in the pressure relief counterbore;

[0016] The first ball is located between the through hole and the first reflow section and is used for blocking or conducting the through hole.

[0017] In the above technical solution, further, it also includes:

[0018] A second ball bearing is provided in the oil supply pump body with an oil pump countersunk hole connected with the oil pump oil passage, and the second ball bearing is installed in the oil pump countersunk hole;

[0019] The first plug is installed in the pump oil sink hole, and a second spring is arranged between the first plug and the second ball, and is used for the second ball to block or conduct the pump oil passage.

[0020] The oil pumping passage includes a first oil pumping section and a second oil pumping section located on both sides of the second ball, and the second oil pumping section is connected to the first reflux section.

[0021] In the above technical solution, further:

[0022] An oil injection channel is provided in the oil supply pump body, one end of the oil injection channel is communicated with the second oil pumping section, and the other end extends to the surface of the oil supply pump body and is provided with a second plug.

[0023] In the above technical solution, further:

[0024] A safety oil passage is provided in the oil supply pump body, and one end of the safety oil passage is communicated with the first reflux section, and the other end extends to the surface of the oil supply pump body and is communicated with the oil bag;

[0025] Among them, the safety oil channel is located on one side of the oil bag and is equipped with a safety valve.

[0026] In the above technical solution, further, the driving mechanism includes:

[0027] A plunger assembly is installed in the oil supply pump body and is used to draw oil from the oil bag and pump it into the pump oil channel;

[0028] The driving member is installed on the side of the oil supply pump body and is used to drive the plunger assembly.

[0029] In the above technical solution, further, the mold frame includes:

[0030] The upper die seat is connected to the oil supply pump body and is axially provided with an upper die;

[0031] The lower die base is provided with a lower die, a connecting frame is provided between the lower die base and the upper die base, and the lower die base is coaxially arranged with the upper die base;

[0032] A piston is slidably connected in the pump oil cavity, one end of the piston extends into the mold frame to be connected with the upper mold, and is used to drive the upper mold to approach or move away from the lower mold.

[0033] The beneficial effects of the utility model are:

[0034] 1. By integrally forming the existing pump body and the oil bag seat, the requirements for sealing performance are reduced, the convenience of processing is improved, and a press switch is used for the pressure relief in the return oil channel, which effectively improves the convenience of pressure relief and oil return.

[0035] 2. When pumping oil, the hydraulic oil pushes the first ball to abut against the valve seat for sealing, avoiding the use of rotation. After multiple rotations, the thread slips and the abutment against the pressure relief ball is lost, which leads to failure of the pressure relief component.

[0036] 3. By opening an oil filling channel on the oil supply pump body, when the hydraulic oil in the oil bag is too little, the oil bag does not need to be disassembled, and the oil can be filled by removing the second plug, thereby avoiding the reduction of the sealing effect between the oil bag and the oil supply pump body caused by multiple disassembly. At the same time, the oil filling channel is connected with the second oil pumping section, and the second oil pumping section is connected with the first oil return section, so that when filling the oil, the pressure relief switch can be pressed to inject the hydraulic oil into the oil bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of the utility model;

[0038] Figure 2 It is a top view of the utility model;

[0039] Figure 3 This utility model Figure 2 Sectional view at AA in the middle;

[0040] Figure 4 This utility model Figure 3 Enlarged view of point C in the middle;

[0041] Figure 5 This utility model Figure 3 The enlarged view of point D in the middle;

[0042] Figure 6 This utility model Figure 2 Sectional view at the middle BB;

[0043] Figure 7 This utility model Figure 6 Enlarged view of point E in the middle;

[0044] The symbols in the figure are as follows: 1. mold frame; 100. upper mold base; 101. upper mold; 102. lower mold base; 103. lower mold; 104. connecting frame; 105. piston; 2. oil supply pump body; 3. pump oil chamber; 4. pump oil channel; 40. first pump oil section; 41. second pump oil section; 5. return oil channel; 50. first return section; 51. second return section; 6. oil bag; 7. driving mechanism; 70. plunger assembly Component; 71, driving component; 8, push switch; 80, valve seat; 81, through hole; 82, top column; 83, top head; 84, pressing head; 85, first spring; 86, limit retaining ring; 9, pressure relief counterbore; 10, first ball; 11, second ball; 12, pump oil counterbore; 13, first plug; 14, second spring; 15, oil injection channel; 16, second plug; 17, safety oil channel; 18, safety valve. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0046] Embodiment 1:

[0047] This embodiment provides a hydraulic tool, including:

[0048] Mould frame 1;

[0049] The oil supply pump body 2 is installed on one side of the mold frame 1, and is provided with an oil pump cavity 3 on the side close to the mold frame 1, and is provided with an oil pump passage 4 and an oil return passage 5 communicating with the oil pump cavity 3;

[0050] The oil bag 6 is installed on one side of the oil supply pump body 2, and the pump oil passage 4 and the return oil passage 5 are both connected to the oil bag 6;

[0051] The driving mechanism 7 is installed on one side of the oil supply pump body 2 and is used to drive the hydraulic oil from the oil bag 6 to enter the pump oil chamber 3 through the pump oil passage 4;

[0052] Among them, a pressure relief counterbore 9 connected to the return oil channel 5 is opened on one side of the oil supply pump body 2 close to the return oil channel 5, and a first ball 10 and a push switch 8 for driving the first ball 10 to block or open the return oil channel 5 are installed in the pressure relief counterbore 9.

[0053] It can be seen from this embodiment that by integrally forming the existing pump body and the oil bag 6 seat, the requirements for sealing performance are reduced, the convenience of processing is improved, and the pressure relief in the return oil channel 5 is carried out by pressing the switch 8, which effectively improves the convenience of pressure relief and oil return.

[0054] Embodiment 2:

[0055] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The push switch 8 includes:

[0056] The valve seat 80 is mounted on the inner wall of the pressure relief counterbore 9, and the return oil passage 5 includes a first return section 50 and a second return section 51 located on both axial sides of the valve seat 80, and a through hole 81 is axially opened on the valve seat 80;

[0057] A top column 82 is slidably mounted in the pressure relief counterbore 9, and one end of the top column 82 forms a top head 83 adapted to the through hole 81, and the other end of the top column 82 extends out of the pressure relief counterbore 9 to form a pressing head 84;

[0058] The first spring 85 is sleeved on the surface of the top head 83 and is located between the top column 82 and the valve seat 80;

[0059] The limit ring 86 is sleeved on the surface of the pressing head 84 and connected to the inner wall of the pressure relief counterbore 9, and is used to limit the top column 82 in the pressure relief counterbore 9;

[0060] The first ball 10 is located between the through hole 81 and the first reflux section 50 and is used to block or conduct the through hole 81. A conical surface is provided on one side of the through hole 81 close to the first ball 10, and a hexagonal groove is provided on the side of the valve seat 80 away from the conical surface, so as to facilitate installation and removal of the valve seat 80. The valve seat 80 is connected to the pressure relief counterbore 9 by a threaded connection.

[0061] At the same time, a stepped boss is also provided in the pressure relief counterbore 9, and a sealing gasket is provided between the valve seat 80 and the stepped boss, and an integrated structure is adopted between the top column 82, the top head 83 and the pressing head 84, and the surface of the pressing head 84 can be hemispherical, and the position of the pressure relief counterbore 9 can be close to one side of the driving mechanism 7, so as to further improve the convenience when pressing;

[0062] In addition, a threaded connection can be adopted between the limit retaining ring 86 and the inner wall of the pressure relief counterbore 9, and an internal hexagonal groove is axially opened on the surface. During installation or disassembly, the internal hexagonal groove is clamped by an internal hexagonal wrench, and the pressing head 84 is abutted to compress the first spring 85, thereby improving the convenience of installation and disassembly of the limit retaining ring 86.

[0063] It can be seen from the present embodiment that by using pump oil, the hydraulic oil pushes the first ball 10 to abut against the valve seat 80 for sealing. Specifically, by pushing the pressing head 84, the push column 82 slides inward, and the push head 83 enters the through hole 81 and pushes the first ball 10 open, thereby opening the through hole 81, so as to avoid the situation where the thread slips after multiple rotations, especially the loss of abutment against the pressure relief ball, which leads to failure of the pressure relief component.

[0064] Embodiment 3:

[0065] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including:

[0066] The second ball 11 is provided in the oil supply pump body 2 with an oil pump countersunk hole 12 communicating with the oil pump oil passage 4, and the second ball 11 is installed in the oil pump countersunk hole 12;

[0067] The first plug 13 is installed in the oil pump counterbore 12 , and a second spring 14 is provided between the first plug 13 and the second ball 11 , and is used for the second ball 11 to block or open the oil pump passage 4 .

[0068] The oil pump passage 4 includes a first oil pump section 40 and a second oil pump section 41 located on both sides of the second ball 11, and the second oil pump section 41 is connected to the first reflux section 50;

[0069] Meanwhile, a sealing gasket may be provided at the first plug 13 , and the first plug 13 may be fastened with bolts.

[0070] It can be seen from the present embodiment that the second spring 14 pushes the second ball 11 to seal the first oil pumping section 40. Under the action of the driving mechanism 7, the hydraulic oil enters the first oil pumping section 40 from the oil bag 6, and then pushes the second ball 11 away, enters the second oil pumping section 41, and finally enters the oil pumping chamber 3. Therefore, one-way conduction can be achieved through the action of the second spring 14 and the second ball 11. When the second oil pumping section 41 is connected to the first reflux section 50, when the push-button switch 8 is pushed to connect the first reflux section 50 and the second reflux section 51, the hydraulic oil can enter the oil bag 6 from the second oil pumping section 41 through the first reflux section 50 and the second reflux section 51, thereby circulating the hydraulic oil.

[0071] Embodiment 4:

[0072] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0073] An oil injection channel 15 is provided in the oil supply pump body 2, and one end of the oil injection channel 15 is connected to the second oil pumping section 41, and the other end extends to the surface of the oil supply pump body 2 and is provided with a second plug 16;

[0074] At the same time, in order to improve the sealing performance, a sealing gasket can be provided at the second plug 16, and the second plug 16 can be bolted.

[0075] It can be seen from this embodiment that by opening the oil injection channel 15 on the oil supply pump body 2, when the hydraulic oil in the oil bag 6 is too little, the oil bag 6 does not need to be disassembled, and the second plug 16 can be removed to inject oil, thereby avoiding the reduction of the sealing effect between the oil bag 6 and the oil supply pump body 2 caused by multiple disassembly. At the same time, the oil injection channel 15 is connected to the second oil pumping section 41, and the second oil pumping section 41 is connected to the first oil return section, so that when injecting oil, the pressure relief switch is pressed to inject hydraulic oil into the oil bag 6;

[0076] In addition, the oil filling channel 15 is opened so that during the initial assembly, after the oil filling is completed, the drive mechanism can be started to allow the hydraulic oil to circulate and the air inside the oil supply pump body 2 to be discharged through the circulation of the hydraulic oil, thereby achieving the effect of exhausting air, and then it is sealed by the second plug 16.

[0077] Embodiment 5:

[0078] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0079] A safety oil passage 17 is provided in the oil supply pump body 2, and one end of the safety oil passage 17 is connected to the first reflux section 50, and the other end extends to the surface of the oil supply pump body 2 and is connected to the oil bag 6;

[0080] Among them, the safety oil passage 17 is located on one side of the oil bag 6 and is equipped with a safety valve 18;

[0081] At the same time, the specific structure of the safety valve 18 is the prior art and has been disclosed in the patent document of Chinese patent application number (CN202222735482.8), which will not be repeated here.

[0082] It can be seen from the present embodiment that a safety oil passage 17 connected to the first reflux section 50 is provided in the oil supply pump body 2, and a safety valve 18 is provided in the safety oil passage 17. When the hydraulic oil pressure in the oil supply pump body 2 exceeds the threshold value of the safety valve 18 and the pressure relief valve cannot be opened, the hydraulic oil will push open the safety valve 18 and unload the hydraulic oil into the oil bag 6, thereby improving safety.

[0083] Embodiment 6:

[0084] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The driving mechanism 7 includes:

[0085] The plunger assembly 70 is installed in the oil supply pump body 2 and is used to draw oil from the oil bag 6 and pump it into the pump oil passage 4;

[0086] A driving member 71 is installed on the side of the oil supply pump body 2 and is used to drive the plunger assembly 70;

[0087] Among them, the specific structure of the plunger assembly 70 is the prior art and has been disclosed in the patent document of Chinese patent application number (CN202222735482.8), which will not be repeated here;

[0088] The driving member 71 can be either electric or pneumatic. It only needs to be able to drive the plunger assembly 70 to extract oil from the oil bag 6. There is no limitation here. Specifically, the electric drive can adopt a combination of a motor and an eccentric shaft as disclosed in the patent document of Chinese patent application number (CN202222735482.8), and the pneumatic drive can adopt a cylinder to push the plunger assembly 70 to reciprocate.

[0089] It can be seen from the present embodiment that by driving the plunger assembly 70 to extract oil from the oil bag 6 and pump it into the oil pump channel 4, the hydraulic oil can be pushed into the oil pump chamber 3 by repeating this process for multiple times. As the amount of hydraulic oil pumped in increases, the pressure of the hydraulic oil will increase, thereby driving the hydraulic tool to operate and ensuring power output.

[0090] Embodiment 7:

[0091] This embodiment provides a hydraulic tool, which, in addition to the technical solutions of the above embodiments, also has the following technical features. The mold frame 1 includes:

[0092] The upper die base 100 is connected to the oil supply pump body 2 and is axially provided with an upper die 101;

[0093] The lower die base 102 is provided with a lower die 103, and a connecting frame 104 is provided between the lower die base 102 and the upper die base 100, and the lower die base 102 is coaxially arranged with the upper die base 100;

[0094] A piston 105 is slidably connected in the pump oil chamber 3, one end of the piston 105 extends into the mold frame 1 and is connected to the upper mold 101, and is used to drive the upper mold 101 to approach or move away from the lower mold 103;

[0095] At the same time, the upper mold 101 and the piston 105 can be connected by bolts, and the piston 105 is also sleeved with a spring to push the piston 105 to reset after the hydraulic oil is depressurized, thereby driving the upper mold 101 away from the lower mold 103;

[0096] In addition, a rubber ring is sleeved on the surface of the upper mold 101 to ensure soft contact between the upper mold 101 and the lower mold 103 when they are matched.

[0097] It can be seen from this embodiment that the hydraulic oil in the pump oil chamber 3 is increased to generate pressure, thereby pushing the piston 105 to drive the upper mold 101 to be pushed toward the lower mold 103. Through the coordinated use of the upper mold 101 and the lower mold 103, the processing of the workpiece is completed.

[0098] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A hydraulic tool, characterized in that: include: Mould frame (1); An oil supply pump body (2) is installed on one side of the mold frame (1), and is provided with an oil pump chamber (3) on the side close to the mold frame (1), and is provided with an oil pump passage (4) and an oil return passage (5) communicating with the oil pump chamber (3); An oil bag (6) is installed on one side of the oil supply pump body (2), and the pump oil passage (4) and the return oil passage (5) are both connected to the oil bag (6); A driving mechanism (7) is installed on one side of the oil supply pump body (2) and is used to drive the hydraulic oil from the oil bag (6) into the pump oil chamber (3) through the pump oil passage (4); A pressure relief counterbore (9) communicating with the return oil passage (5) is provided on one side of the oil supply pump body (2) close to the return oil passage (5), and a first ball (10) and a push switch (8) for driving the first ball (10) to block or open the return oil passage (5) are installed in the pressure relief counterbore (9).

2. The hydraulic tool according to claim 1, characterized in that: The push switch (8) comprises: The valve seat (80) is mounted on the inner wall of the pressure relief counterbore (9), and the return oil passage (5) includes a first return section (50) and a second return section (51) located on both axial sides of the valve seat (80), and a through hole (81) is axially opened on the valve seat (80); A top column (82) is slidably mounted in the pressure relief counterbore (9), and one end of the top column forms a top head (83) adapted to the through hole (81), and the other end of the top column extends out of the pressure relief counterbore (9) to form a pressing head (84); A first spring (85) is sleeved on the surface of the top head (83) and is located between the top column (82) and the valve seat (80); A limit ring (86) is sleeved on the surface of the pressing head (84) and connected to the inner wall of the pressure relief counterbore (9), and is used to limit the top column (82) in the pressure relief counterbore (9); The first rolling ball (10) is located between the through hole (81) and the first reflow section (50), and is used to block or conduct the through hole (81).

3. The hydraulic tool according to claim 2, characterized in that: Also includes: A second ball (11), wherein an oil pumping hole (12) communicating with the oil pumping passage (4) is provided in the oil supply pump body (2), and the second ball (11) is installed in the oil pumping hole (12); The first plug (13) is installed in the pump oil sink hole (12), and a second spring (14) is arranged between the first plug and the second ball (11), and is used for the second ball (11) to block or open the pump oil passage (4); The oil pump passage (4) comprises a first oil pump section (40) and a second oil pump section (41) located on both sides of the second ball (11), and the second oil pump section (41) is connected to the first reflux section (50).

4. The hydraulic tool according to claim 3, characterized in that: An oil injection channel (15) is provided in the oil supply pump body (2), one end of the oil injection channel (15) is connected to the second oil pumping section (41), and the other end extends to the surface of the oil supply pump body (2) and is provided with a second plug (16).

5. The hydraulic tool according to claim 2, characterized in that: A safety oil passage (17) is provided in the oil supply pump body (2), and one end of the safety oil passage (17) is connected to the first reflux section (50), and the other end extends to the surface of the oil supply pump body (2) and is connected to the oil bag (6); Wherein, the safety oil passage (17) is located on one side of the oil bag (6) and is equipped with a safety valve (18).

6. The hydraulic tool according to claim 1, characterized in that: The driving mechanism (7) comprises: A plunger assembly (70) is installed in the oil supply pump body (2) and is used to draw oil from the oil bag (6) and pump it into the pump oil passage (4); The driving member (71) is installed on the side of the oil supply pump body (2) and is used to drive the plunger assembly (70).

7. The hydraulic tool according to claim 1, characterized in that: The mold frame (1) comprises: An upper die seat (100) is connected to the oil supply pump body (2) and is axially provided with an upper die (101); A lower die base (102) is provided with a lower die (103), a connecting frame (104) is arranged between the lower die base (102) and the upper die base (100), and the lower die base (102) is coaxially arranged with the upper die base (100); A piston (105) is slidably connected in the pump oil chamber (3), one end of the piston (105) extends into the mold frame (1) and is connected to the upper mold (101), and is used to drive the upper mold (101) to move closer to or away from the lower mold (103).

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