Riveting tool pump body with built-in oil circuit, and efficient electric hydraulic riveting tool

Abstract

A riveting tool pump body with a built-in oil circuit, and an efficient electric hydraulic riveting tool. The riveting tool pump body with a built-in oil circuit comprises a main body (2) for directly delivering oil to a riveting working head (1), wherein an oil delivery channel (4) for communicating with an oil tank (3) and at least one cartridge valve cavity for accommodating a cartridge valve are provided in the main body (2), and the oil delivery channel (4) communicates with the cartridge valve cavity. The efficient electric hydraulic riveting tool comprises the riveting working head (1), the cartridge valve, the oil tank (3), a combined plunger pump body (5), and the riveting tool pump body with a built-in oil circuit, wherein the cartridge valve is connected into the cartridge valve cavity in a sealed manner, and the riveting working head (1), the oil tank (3) and the combined plunger pump body (5) are connected to an outer wall of the main body (2) in a sealed manner.

Description

Riveting tool pump body with built-in oil circuit and high-efficiency electric hydraulic riveting tool TECHNICAL FIELD

[0001] The present application relates to the technical field of rivet assembly tools, in particular to a riveting tool pump body with built-in oil circuit and a high-efficiency electric hydraulic riveting tool. BACKGROUND

[0002] The existing electric hydraulic riveting tool, as described in the Chinese patent application with publication number CN115319009A, includes a riveting work head for performing a riveting action and a hydraulic pump assembly for delivering oil into the riveting work head to drive the riveting work head to perform the riveting action. The hydraulic pump assembly includes a main body, a crank cavity, an oil delivery channel, a first drive oil circuit, a second drive oil circuit, a low-pressure oil circuit, and a high-pressure oil circuit arranged in the main body.

[0003] The existing hydraulic pump assembly also includes a reversing valve and a bypass valve arranged outside the main body. The main body, the reversing valve, and the bypass valve occupy a relatively large space. In addition, the reversing valve and the bypass valve are arranged outside the main body, which makes the extension paths of the first drive oil circuit and the second drive oil circuit connected to the reversing valve, and the oil delivery channel, the low-pressure oil circuit, and the high-pressure oil circuit connected to the bypass valve relatively long. This results in a relatively long travel time of the oil in these channels, thereby reducing the overall work efficiency.

[0004] At the same time, in the existing hydraulic riveting tool, a combination of a high-power motor and a reducer is usually used to provide power, which results in a poor power utilization rate of the motor and a relatively low service life of the high-power motor due to its high heat generation.

[0005] SUMMARY

[0006] The present application aims to provide a riveting tool pump body with built-in oil circuit and a high-efficiency electric hydraulic riveting tool, which can effectively improve the work efficiency of the electric hydraulic riveting tool.

[0007] To solve the above technical problems, the present application adopts the following solutions:

[0008] The first aspect is a riveting tool pump body with built-in oil lines, comprising a main body for directly delivering oil to a riveting head, the main body is provided with an oil delivery channel for communicating with an oil tank and at least one cartridge valve cavity for accommodating a cartridge valve, and the oil delivery channel communicates with all cartridge valve cavities. The riveting head is a common prior art and is not described in detail. By providing the cartridge valve cavity, the cartridge-type switching valve, bypass valve and safety valve can be directly installed in the main body. Compared with the prior art design of sealingly connecting the switching valve, bypass valve and safety valve outside the main body, the oil lines originally outside the main body are directly built into the main body, which can reduce the overall space occupied by the main body and each valve, effectively shorten the distance and time of oil traveling in each oil line, thereby effectively improving the working efficiency of the pump body. By building the oil lines into the main body, the leakage points in the hydraulic system can be effectively reduced, the hydraulic components are no longer connected by hoses, and the hydraulic system can work in a wider temperature range.

[0009] Further, the main body is provided with high-pressure oil lines and low-pressure oil lines for communicating with a combined plunger pump body, and first and second drive oil lines for communicating with the riveting head. The cartridge valve cavity includes a switching valve cavity for inserting a switching valve, and the oil delivery channel, high-pressure oil lines, first and second drive oil lines all communicate with the switching valve cavity. The riveting head is provided with a piston cavity for the back-and-forth movement of a working piston head, the first drive oil line communicates with the front side of the piston cavity, and the second drive oil line communicates with the rear side of the piston cavity. By providing the switching valve cavity, the switching valve can be built into the main body, thereby reducing the space occupied by the switching valve and shortening the distance of the oil lines connected to the switching valve. By providing the first and second drive oil lines, the working piston head can be driven to move. When the first drive oil line supplies oil to the riveting head and the second drive oil line discharges oil from the riveting head, the working piston head in the riveting head moves backward. When the first drive oil line discharges oil from the riveting head and the second drive oil line supplies oil to the riveting head, the working piston head in the riveting head moves forward. By connecting the first and second drive oil lines to the switching valve cavity, the switching valve can switch the oil supply and discharge states of the first and second drive oil lines. By connecting the oil delivery channel and high-pressure oil lines to the switching valve cavity, the oil in the oil tank and the combined plunger pump body can be delivered to the switching valve and then to the riveting head.

[0010] Further, the plug-in valve cavity comprises a bypass valve cavity for inserting a bypass valve, the oil delivery channel, the low-pressure oil path and the high-pressure oil path are all communicated with the bypass valve cavity. The bypass valve cavity is arranged to reduce the space occupied by the bypass valve and shorten the length of the oil path connected with the bypass valve. The oil delivery channel, the low-pressure oil path and the high-pressure oil path are all communicated with the bypass valve, so that the bypass valve can be used to control the connection between the oil delivery channel and the low-pressure oil path by the hydraulic pressure in the high-pressure oil path.

[0011] Further, the plug-in valve cavity comprises a bypass valve cavity for inserting a bypass valve, the oil delivery channel, the low-pressure oil path and the high-pressure oil path are all communicated with the bypass valve cavity. The bypass valve cavity is arranged to reduce the space occupied by the bypass valve and shorten the length of the oil path connected with the bypass valve. The oil delivery channel, the low-pressure oil path and the high-pressure oil path are all communicated with the bypass valve, so that the bypass valve can be used to control the connection between the oil delivery channel and the low-pressure oil path by the hydraulic pressure in the high-pressure oil path.

[0012] Further, the main body is provided with an oil storage groove for communicating with the oil tank, and the oil delivery channel is communicated with the oil storage groove. The oil storage groove is arranged to collect and transfer the oil flowing out of the oil tank and the oil flowing out of the oil delivery channel.

[0013] Further, the main body is provided with an oil storage groove for communicating with the oil tank, and the oil delivery channel is communicated with the oil storage groove. The oil storage groove is arranged to collect and transfer the oil flowing out of the oil tank and the oil flowing out of the oil delivery channel.

[0014] The second aspect is a high-efficiency electric hydraulic riveting tool, which comprises a riveting tool head, a plug-in valve, an oil tank, a combined plunger pump body and the above-mentioned riveting tool pump body with an internal oil path. The plug-in valve is sealingly connected in the plug-in valve cavity, and the riveting tool head, the oil tank and the combined plunger pump body are sealingly connected to the outer wall of the main body. The riveting tool further comprises a crankshaft and a low-speed motor directly connected to the crankshaft. The low-speed motor replaces the combination of the high-speed motor and the speed reducer in the prior art, generates less heat and has a longer service life.

[0015] Further, the reversing valve cavity comprises a first oil cavity communicated with the first driving oil path and a second oil cavity communicated with the second driving oil path, the front and rear ends of the first and second oil cavities are respectively provided with an oil delivery cavity communicated with the oil delivery channel and a high-pressure oil cavity communicated with the high-pressure oil path, and a partition plate for separating each adjacent oil cavity is arranged on the outer wall of the reversing valve in the state that the reversing valve is arranged in the reversing valve cavity, the partition plate is a sealing structure in the hydraulic system, a first valve core for connecting the first oil cavity with the oil delivery cavity or the high-pressure oil cavity is arranged in the reversing valve, and a second valve core for connecting the second oil cavity with the oil delivery cavity or the high-pressure oil cavity is arranged in the reversing valve.

[0016] Further, the bypass valve cavity comprises an oil delivery cavity communicated with the oil delivery channel, a low-pressure oil cavity communicated with the low-pressure oil path and a high-pressure oil cavity communicated with the high-pressure oil path, and a partition plate for separating each adjacent oil cavity is arranged on the outer wall of the bypass valve in the state that the bypass valve is arranged in the bypass valve cavity, and a bypass valve core for connecting the low-pressure oil cavity with the oil delivery cavity is arranged in the bypass valve.

[0017] Further, the safety valve cavity comprises an oil delivery cavity communicated with the oil delivery channel and a safety oil cavity communicated with the safety oil path, and a partition plate for separating the safety oil cavity from the oil delivery cavity is arranged on the outer wall of the safety valve in the state that the safety valve is arranged in the safety valve cavity, and a safety valve core for connecting the oil delivery cavity with the safety oil cavity is arranged in the safety valve.

[0018] The present application has the beneficial effects that:

[0019] By arranging the plug-in valve cavity, the plug-in reversing valve, the plug-in bypass valve and the plug-in safety valve can be directly arranged in the main body, compared with the prior art that the reversing valve, the bypass valve and the safety valve are sealingly connected to the outside of the main body, the oil paths in the valves originally arranged outside the main body are directly arranged in the main body, the space occupied by the main body and the valves can be reduced, the oil paths in the valves can be shortened, and the working efficiency of the pump body can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a schematic structural view of an electric hydraulic riveting tool according to an embodiment of the present application;

[0021] Fig. 2 is a schematic structural view of an enlarged structure at F in Fig. 1;

[0022] Fig. 3 is a schematic structural view of a main body provided with a combined plunger pump body, a crankshaft and plug-in valves;

[0023] Fig. 4 is a schematic structural view of a sectional structure at A-A in Fig. 3;

[0024] Fig. 5 is a schematic structural view of a sectional structure at B-B in Fig. 3;

[0025] Fig. 6 is a schematic view of a sectional structure at C-C in Fig. 3;

[0026] Fig. 7 is a schematic view of a sectional structure at D-D in Fig. 3;

[0027] Fig. 8 is a schematic view of a sectional structure at E-E in Fig. 3.

[0028] Fig. 6 is a schematic view of a sectional structure at C-C in Fig. 3; DETAILED DESCRIPTION

[0029] The application will be further described below in conjunction with the embodiments and drawings, but the embodiments of the application are not limited thereto.

[0030] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0031] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "opened", "mounted", "connected", and "linked" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; and can be connected internally between two elements. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0032] Example 1

[0033] The first aspect is a riveting tool pump body with built-in oil circuit, as shown in FIG. 1, comprising a main body 2 for directly delivering oil to the riveting head 1, the main body 2 is provided with at least one cartridge valve cavity for accommodating cartridge valves and an oil delivery channel 4 for communicating with the oil tank 3, and the oil delivery channel 4 communicates with all cartridge valve cavities. The riveting head 1 is a common prior art and is not described in detail. The outlet of the oil delivery channel 4 on the outer wall of the main body 2 is only one, which is the opening of the oil delivery channel 4 communicating with the oil storage tank 17. Its function is that through the setting of the cartridge valve cavity, the cartridge type reversing valve 10, bypass valve 12 and safety valve 14 can be directly installed in the main body 2. Compared with the prior art design of sealingly connecting the reversing valve 10, bypass valve 12 and safety valve 14 outside the main body 2, the oil circuit originally outside the main body 2 is directly built into the main body 2, which can reduce the space occupied by the main body 2 and the whole valve, effectively shorten the distance and time of the oil in the oil circuit, and effectively improve the working efficiency of the pump body.

[0034] Specifically, as shown in FIG. 2, the main body 2 is provided with a high-pressure oil path 6 and a low-pressure oil path 7 for communicating with the combined plunger pump body 5 and a first driving oil path 8 and a second driving oil path 9 for communicating with the riveting working head 1. As shown in FIG. 4, the plug-in valve cavity includes a reversing valve cavity 11 for inserting the reversing valve 10, and the oil delivery channel 4, the high-pressure oil path 6, the first driving oil path 8, and the second driving oil path 9 are all in communication with the reversing valve cavity 11. On the outer wall of the main body 2, there are an outlet of the first driving oil path 8 and an outlet of the second driving oil path 9, i.e., the outlets for communicating with the riveting working head 1; the high-pressure oil path 6 has three outlets on the outer wall of the main body 2, two of which are respectively in communication with the combined plunger pump body 5 on both sides of the main body 2, and the other outlet is in communication with the pressure sensor 32; the low-pressure oil path 7 has two outlets on the outer wall of the main body 2, i.e., the outlets of the low-pressure oil path 7 in communication with the combined plunger pump body 5. All the oil paths have drill holes on the side wall of the main body 2 for allowing the drill bit to drill into the drill holes to form the oil paths, and each drill hole not serving as an outlet is provided with a plug (not shown). The riveting working head 1 is provided with a piston cavity for allowing the working piston head to move back and forth, the first driving oil path 8 is in communication with the front side of the piston cavity, and the second driving oil path 9 is in communication with the back side of the piston cavity. The functions are as follows: through the provision of the reversing valve cavity 11, the reversing valve 10 can be built-in the main body 2, thereby reducing the space occupied by the reversing valve 10 and shortening the distance of the oil paths in communication with the reversing valve 10; through the provision of the first driving oil path 8 and the second driving oil path 9, the working piston head can be driven to move, when the first driving oil path 8 delivers oil into the riveting working head 1 and the second driving oil path 9 delivers oil out of the riveting working head 1, the working piston head in the riveting working head 1 moves backward; when the first driving oil path 8 delivers oil out of the riveting working head 1 and the second driving oil path 9 delivers oil into the riveting working head 1, the working piston head in the riveting working head 1 moves forward. Through the design of the first driving oil path 8 and the second driving oil path 9 in communication with the reversing valve cavity 11, the first driving oil path 8 and the second driving oil path 9 can be switched by the reversing valve 10 to deliver oil or deliver oil out. Through the design of the oil delivery channel 4 and the high-pressure oil path 6 in communication with the reversing valve cavity 11, the oil in the oil tank 3 and the combined plunger pump body 5 can be delivered into the reversing valve 10 and then delivered into the riveting working head 1.

[0035] Specifically, as shown in FIG. 3, the plug-in valve cavity includes a bypass valve cavity 13 for inserting the bypass valve 12, and the oil delivery channel 4, the low-pressure oil path 7, and the high-pressure oil path 6 are all in communication with the bypass valve cavity 13. The functions are as follows: through the provision of the bypass valve cavity 13, the bypass valve 12 can be built-in the main body 2, thereby reducing the space occupied by the bypass valve 12 and shortening the distance of the oil paths in communication with the bypass valve 12; through the design of the oil delivery channel 4, the low-pressure oil path 7, and the high-pressure oil path 6 in communication with the bypass valve 12, the bypass valve 12 can be used to control the communication or not of the oil delivery channel 4 and the low-pressure oil path 7 by the hydraulic pressure in the high-pressure oil path 6.

[0036] Specifically, as shown in FIG. 5, the plug-in valve cavity includes a safety valve cavity 15 for inserting the safety valve 14, and the oil delivery channel 4 is in communication with the safety valve cavity 15. As shown in FIG. 7, the safety valve cavity 15 is in communication with the high-pressure oil path 6 through a safety oil path 16. The function is that, through the setting of the safety valve cavity 15, the safety valve 14 can be built-in in the main body 2, thereby reducing the space occupied by the safety valve 14 and shortening the distance of the oil path connected with the safety valve 14; through the design that the oil delivery channel 4 and the safety oil path 16 are both in communication with the safety valve cavity 15, the oil delivery channel 4 can be connected with the safety oil path 16 through the safety valve 14 when the hydraulic pressure in the high-pressure oil path 6 is too high, thereby reducing the pressure in the high-pressure oil path 6.

[0037] The inner diameters of the reversing valve cavity 11, the bypass valve cavity 13, and the safety valve cavity 15 are gradually reduced from outside to inside.

[0038] Specifically, as shown in FIG. 8, the main body 2 is provided with an oil storage groove 17 for being in communication with the oil tank 3, and the oil delivery channel 4 is in communication with the oil storage groove 17. The oil storage groove 17 is provided with a filter screen 33, through which the oil flowing from the oil storage groove 17 into the crankshaft cavity 19 can be filtered, thereby effectively avoiding the external impurities from entering the combined plunger pump body 5 or the plug-in valves, effectively filtering the impurities possibly left in the hydraulic system in the production and processing links, and improving the system reliability. The function is that, through the setting of the oil storage groove 17, the oil flowing out of the oil tank 3 and the oil flowing out of the oil delivery channel 4 can be collected and transferred.

[0039] Specifically, as shown in FIG. 6, the main body 2 is provided with a crankshaft cavity 19 for placing a crankshaft 18, and the oil storage groove 17 is in communication with the crankshaft cavity 19. The function is that, through the design that the crankshaft cavity 19 is in communication with the oil storage groove 17, the combined plunger pump body 5 can be supplied with oil while the crankshaft 18 in the crankshaft cavity 19 is lubricated.

[0040] In the second aspect, an efficient electric hydraulic riveting tool includes a riveting tool head, a plug-in valve, an oil tank 3, a combined plunger pump body 5, and the above-mentioned riveting tool pump body with built-in oil path, the plug-in valve is sealingly connected in the plug-in valve cavity, and the riveting tool head, the oil tank 3, and the combined plunger pump body 5 are sealingly connected on the outer wall of the main body 2. It also includes a crankshaft 18 and a low-speed motor directly connected with the crankshaft 18, through the setting of the low-speed motor, the combination of the high-speed motor and the speed reducer in the prior art is replaced, the heat generation is lower, and the service life is longer. It also includes a pressure sensor 32, and the high-pressure oil path 6 is in communication with the pressure sensor 32. It also includes the crankshaft 18, which is arranged in the crankshaft cavity 19. The riveting tool head, the oil tank 3, the crankshaft 18, and the combined plunger pump all adopt the prior art, which is not described in detail.

[0041] The front end face of the main body 2 is sealedly connected with the head of the riveting tool, each of the left and right end faces of the main body 2 is provided with a combined plunger pump body 5, the oil storage groove 17 and the pressure sensor 32 are arranged on the right side of the main body 2, the opening of the reversing valve cavity 11 is arranged on the rear end face of the main body 2, the electromagnet 31 connected with the reversing valve 10 is arranged on the rear end face of the main body 2, the electromagnet 31 is used for controlling the working of the reversing valve 10, and the openings of the bypass valve cavity 13 and the safety valve cavity 15 are arranged on the top face of the main body 2. The electromagnet 31 adopts the prior art, and details are not described herein.

[0042] Specifically, as shown in FIGS. 4-8, the reversing valve cavity 11 includes a first oil cavity 20 communicated with the first driving oil way 8 and a second oil cavity 21 communicated with the second driving oil way 9, the front and rear ends of the first oil cavity 20 and the second oil cavity 21 are respectively provided with an oil delivery cavity 22 communicated with the oil delivery channel 4 and a high-pressure oil cavity 23 communicated with the high-pressure oil way 6, in the state that the reversing valve 10 is arranged in the reversing valve cavity 11, a partition plate 25 for separating each adjacent oil cavity is arranged on the outer wall of the reversing valve 10, a first valve core 26 for connecting the first oil cavity 20 with the oil delivery cavity 22 or the high-pressure oil cavity 23 is arranged in the reversing valve 10, and a second valve core 27 for connecting the second oil cavity 21 with the oil delivery cavity 22 or the high-pressure oil cavity 23 is arranged in the reversing valve 10.

[0043] The oil delivery channel 4, the high-pressure oil way 6 and the first driving oil way 8 are each provided with two branches communicated with the reversing valve cavity 11, the reversing valve cavity 11 is sequentially provided with a first first oil cavity 20, a first oil delivery cavity 22, a second oil cavity 21, a first high-pressure oil cavity 23, a second first oil cavity 20, a second oil delivery cavity 22 and a second high-pressure oil cavity 23 from inside to outside, the first valve core 26 is arranged in the second first oil cavity 20, and the second valve core 27 is arranged in the second oil cavity 21, in the state that the first driving oil way 8 is filled with oil into the riveting working head 1 and the second driving oil way 9 is filled with oil out of the riveting working head 1 (i.e. the state that the working piston head moves backward), the electromagnet 31 drives the first valve core 26 to move, so that the second first oil cavity 20 is communicated with the first high-pressure oil cavity 23, the second first oil cavity 20 is closed with the second oil delivery cavity 22, the second oil cavity 21 is communicated with the first oil delivery cavity 22, and the second oil cavity 21 is closed with the first high-pressure oil cavity 23; in the state that the first driving oil way 8 is filled with oil out of the riveting working head 1 and the second driving oil way 9 is filled with oil into the riveting working head 1 (i.e. the state that the working piston head moves forward), the electromagnet 31 drives the first valve core 26 to move, so that the second first oil cavity 20 is closed with the first high-pressure oil cavity 23, the second first oil cavity 20 is communicated with the second oil delivery cavity 22, the second oil cavity 21 is closed with the first oil delivery cavity 22, and the second oil cavity 21 is communicated with the first high-pressure oil cavity 23.

[0044] The reversing valve 10 is provided with at least two annularly and uniformly distributed oil passing holes on the outer wall of the first oil delivery chamber 22, the second oil chamber 21, the first high pressure oil chamber 23, the second first oil chamber 20, the second oil delivery chamber 22 and the second high pressure oil chamber 23.

[0045] In the embodiment, the reversing valve 10 is provided with four oil passing holes on the outer wall of the first oil delivery chamber 22, the second oil chamber 21, the first high pressure oil chamber 23, the second first oil chamber 20 and the second oil delivery chamber 22, and two oil passing holes on the outer wall of the second high pressure oil chamber 23. The second high pressure oil chamber 23 is provided with a push-pull rod which is controlled by the electromagnet 31 to be pushed forward or pulled backward. The end of the push-pull rod towards the second oil delivery chamber 22 is provided with a plug for closing the second oil delivery chamber 22 and the second high pressure oil chamber 23. The oil entering the reversing valve 10 through the oil passing holes on the second high pressure oil chamber 23 is used to lubricate the push-pull rod.

[0046] The reversing valve 10 is provided with, from outside to inside, the push-pull rod, the first driven rod, the first valve core 26, the second driven rod, the spring, the second valve core 27 and the third driven rod. The spring is located in the first high pressure oil chamber 23. One end of the spring abuts against the stepped surface in the first high pressure oil chamber 23, and the other end of the spring abuts against the stepped surface of the second driven rod. The third driven rod closes the end surface of the reversing valve 10 at the first first oil chamber 20 through the stepped surface.

[0047] In the state that the working head piston needs to be controlled to move backward, the electromagnet 31 pulls the push-pull rod to move outward, the spring resets to push the second driven rod to move outward, and the first valve core 26 is pushed to move outward, so that the first high pressure oil chamber 23 is connected with the second first oil chamber 20, the second first oil chamber 20 is closed with the second oil delivery chamber 22, and the oil in the high pressure oil passage 6 enters the piston chamber in sequence through the first high pressure oil chamber 23, the reversing valve 10, the second first oil chamber 20 and the first driving oil passage 8. At the same time, part of the oil in the high pressure oil passage 6 enters the first first oil chamber 20 in sequence through the first high pressure oil chamber 23, the reversing valve 10 and the first driving oil passage 8. The third driven rod is pushed outward from the innermost end of the reversing valve chamber 11, the third driven rod pushes the second valve core 27 to move outward, the second oil chamber 21 is connected with the first oil delivery chamber 22, the second oil chamber 21 is closed with the first high pressure oil chamber 23, and the oil in the piston chamber enters the oil delivery passage 4 in sequence through the second driving oil passage 9, the second oil chamber 21 and the first oil delivery chamber 22, so that the working head piston moves backward.

[0048] In the state that the control of the forward movement of the working head piston is needed, the electromagnet 31 pushes the push-pull rod to move inward, pushes the first valve core 26 to move inward and compresses the spring, makes the second first oil cavity 20 close to the first high-pressure oil cavity 23, makes the second first oil cavity 20 communicate with the second oil delivery cavity 22, and the oil in the piston cavity sequentially passes through the first driving oil way 8, the second first oil cavity 20, the second oil delivery cavity 22 and enters the oil delivery channel 4, the oil in the first high-pressure oil cavity 23 pushes the second valve core 27 to move inward, makes the second oil cavity 21 close to the first oil delivery cavity 22, makes the second oil cavity 21 communicate with the first high-pressure oil cavity 23, and the oil in the high-pressure oil way 6 sequentially passes through the first high-pressure oil cavity 23, the inside of the reversing valve 10, the second oil cavity 21, the second driving oil way 9 and enters the piston cavity, thereby making the working head piston move forward.

[0049] The bypass valve cavity 13 comprises the oil delivery cavity 22 communicating with the oil delivery channel 4, the low-pressure oil cavity 24 communicating with the low-pressure oil way 7 and the high-pressure oil cavity 23 communicating with the high-pressure oil way 6, in the state that the bypass valve 12 is located in the bypass valve cavity 13, the outer wall of the bypass valve 12 is provided with the partition plate 25 separating each adjacent oil cavity, and the bypass valve 12 is provided with the bypass valve core 28 making the low-pressure oil cavity 24 and the oil delivery cavity 22 communicate.

[0050] The bypass valve 12 is provided with at least two ring-shaped and evenly distributed oil passing holes on the outer wall of the low-pressure oil cavity 24 and the oil delivery cavity 22.

[0051] In the embodiment, the bypass valve 12 is provided with four ring-shaped and evenly distributed oil passing holes on the outer wall of the low-pressure oil cavity 24 and the oil delivery cavity 22, the bypass valve core 28 closes the high-pressure oil cavity 23 and the low-pressure oil cavity 24, the bypass valve 12 is provided with the oil storage cavity, the oil storage cavity and the oil delivery cavity 22 are closed by the gasket, the oil storage cavity is provided with the spring, one end of the spring abuts against the gasket and the other end abuts against the adjusting bolt, the bypass valve core 28 is provided with the oil passing channel communicating the low-pressure oil cavity 24 and the oil storage cavity, in the state that the riveting working head 1 has a small load, the hydraulic pressure in the high-pressure oil cavity 23 is low, the oil in the low-pressure oil cavity 24 flows through the oil passing channel and enters the oil storage cavity, the spring pushes the bypass valve core 28 to move into the bypass valve cavity 13, thereby making the oil delivery cavity 22 close to the low-pressure oil cavity 24; in the state that the riveting working head 1 has a large load, the hydraulic pressure in the high-pressure oil cavity 23 is high, the oil in the high-pressure oil cavity 23 pushes the bypass valve core 28 to move outwardly from the bypass valve 12, thereby making the oil delivery cavity 22 communicate with the low-pressure oil cavity 24.

[0052] The safety valve cavity 15 comprises the oil delivery cavity 22 communicating with the oil delivery channel 4 and the safety oil cavity 29 communicating with the safety oil way 16, in the state that the safety valve 14 is located in the safety valve cavity 15, the outer wall of the safety valve 14 is provided with the partition plate 25 separating the safety oil cavity 29 and the oil delivery cavity 22, and the safety valve 14 is provided with the safety valve core 30 making the oil delivery cavity 22 and the safety oil cavity 29 communicate.

[0053] The safety valve 14 is provided with at least two ring-shaped and uniformly distributed oil passing holes on the outer wall of the oil delivery cavity 22.

[0054] In the embodiment, the safety valve 14 is provided with four ring-shaped and uniformly distributed oil passing holes on the outer wall of the oil delivery cavity 22, and the outer end of the safety valve core 30 is provided with a gasket and a spring in sequence. When the hydraulic pressure in the safety oil cavity 29 is low, the spring pushes the safety valve core 30 to move into the safety valve cavity 15, so as to close the oil delivery cavity 22 and the safety oil cavity 29. When the hydraulic pressure in the safety oil cavity 29 is high, the oil in the safety oil cavity 29 pushes the safety valve core 30 to move out of the safety valve cavity 15, so as to connect the oil delivery cavity 22 and the safety oil cavity 29, thereby limiting the oil pressure to be lower than the highest pressure set by the safety valve 14.

[0055] The working principle of the embodiment is described as follows: through the design of the reversing valve cavity 11, the bypass valve cavity 13 and the safety valve cavity 15, each cartridge valve can be directly inserted into the inside of the main body 2, and the paths of each oil passage in each cartridge valve are also located in the main body 2, thereby effectively reducing the length of each oil passage and enhancing the oil delivery efficiency.

[0056] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. According to the technical essence of the present application, any simple modification, equivalent replacement and improvement of the above embodiment, which is within the spirit and principle of the present application, still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A riveting tool pump body with built-in oil circuit, comprising a main body (2) for directly delivering oil to a riveting working head (1), characterized in that: The main body (2) is provided with an oil delivery channel (4) for communicating with the oil tank (3) and at least one cartridge valve cavity for accommodating a cartridge valve, and the oil delivery channel (4) communicates with all cartridge valve cavities.

2. A rivet tool pump body with an internal oil passage according to claim 1, characterized in that: The main body (2) is provided with a high-pressure oil passage (6) and a low-pressure oil passage (7) for communicating with the combined plunger pump body (5) and a first drive oil passage (8) and a second drive oil passage (9) for communicating with the riveting tool head (1), and the cartridge valve cavity includes a reversing valve cavity (11) for inserting a reversing valve (10), and the oil delivery channel (4), the high-pressure oil passage (6), the first drive oil passage (8), and the second drive oil passage (9) all communicate with the reversing valve cavity (11).

3. A rivet tool pump body with an internal oil passage according to claim 2, characterized in that: The cartridge valve cavity includes a bypass valve cavity (13) for inserting a bypass valve (12), and the oil delivery channel (4), the low-pressure oil passage (7), and the high-pressure oil passage (6) all communicate with the bypass valve cavity (13).

4. The rivet tool pump body with an internal oil passage of claim 2, wherein: The cartridge valve cavity includes a safety valve cavity (15) for inserting a safety valve (14), and the oil delivery channel (4) communicates with the safety valve cavity (15), and a safety oil passage (16) is provided between the safety valve cavity (15) and the high-pressure oil passage (6).

5. The rivet tool pump body with an internal oil passage of claim 1, wherein: The main body (2) is provided with an oil storage groove (17) for communicating with the oil tank (3), and the oil delivery channel (4) communicates with the oil storage groove (17).

6. A rivet tool pump body with an internal oil passage according to claim 5, characterized in that: The main body (2) is provided with a crankshaft cavity (19) for placing a crankshaft (18), and the oil storage groove (17) communicates with the crankshaft cavity (19).

7. A high efficiency electro-hydraulic riveting tool characterized by: The riveting tool head, the cartridge valve, the oil tank (3), the combined plunger pump body (5), and the riveting tool pump body with the built-in oil passage according to any one of claims 1-6 are sealed and connected in the cartridge valve cavity, and the riveting tool head, the oil tank (3), and the combined plunger pump body (5) are sealed and connected on the outer wall of the main body (2).

8. A high efficiency electro-hydraulic riveting tool according to claim 7, wherein: The main body (2) is provided with a high-pressure oil passage (6) and a low-pressure oil passage (7) for communicating with the combined plunger pump body (5) and a first drive oil passage (8) and a second drive oil passage (9) for communicating with the riveting tool head (1), and the cartridge valve cavity includes a reversing valve cavity (11) for inserting a reversing valve (10), and the oil delivery channel (4), the high-pressure oil passage (6), the first drive oil passage (8), and the second drive oil passage (9) all communicate with the reversing valve cavity (11). The reversing valve cavity (11) includes a first oil cavity (20) communicating with the first drive oil passage (8), a second oil cavity (21) communicating with the second drive oil passage (9), an oil delivery cavity (22) communicating with the oil delivery channel (4), and a high-pressure oil cavity (23) communicating with the high-pressure oil passage (6), and in the state that the reversing valve (10) is arranged in the reversing valve cavity (11), a partition plate (25) is arranged on the outer wall of the reversing valve (10) for separating each adjacent oil cavity, a first valve core (26) is arranged in the reversing valve (10) for connecting the first oil cavity (20) with the oil delivery cavity (22) or the high-pressure oil cavity (23), and a second valve core (27) is arranged in the reversing valve (10) for connecting the second oil cavity (21) with the oil delivery cavity (22) or the high-pressure oil cavity (23).

9. The high efficiency electro-hydraulic riveting tool of claim 7, wherein: The plug-in valve cavity comprises a bypass valve cavity (13) for inserting a bypass valve (12), the oil delivery channel (4), the low-pressure oil passage (7) and the high-pressure oil passage (6) are all communicated with the bypass valve cavity (13); The bypass valve cavity (13) comprises an oil delivery cavity (22) communicated with the oil delivery channel (4), a low-pressure oil cavity (24) communicated with the low-pressure oil passage (7) and a high-pressure oil cavity (23) communicated with the high-pressure oil passage (6), in the state that the bypass valve (12) is located in the bypass valve cavity (13), a partition plate (25) is arranged on the outer wall of the bypass valve (12) to separate each adjacent oil cavity, and a bypass valve core (28) is arranged in the bypass valve (12) to communicate the low-pressure oil cavity (24) and the oil delivery cavity (22).

10. The high efficiency electro-hydraulic riveting tool of claim 7, wherein: The plug-in valve cavity comprises a bypass valve cavity (13) for inserting a bypass valve (12), the oil delivery channel (4), the low-pressure oil passage (7) and the high-pressure oil passage (6) are all communicated with the bypass valve cavity (13); The bypass valve cavity (13) comprises an oil delivery cavity (22) communicated with the oil delivery channel (4), a low-pressure oil cavity (24) communicated with the low-pressure oil passage (7) and a high-pressure oil cavity (23) communicated with the high-pressure oil passage (6), in the state that the bypass valve (12) is located in the bypass valve cavity (13), a partition plate (25) is arranged on the outer wall of the bypass valve (12) to separate each adjacent oil cavity, and a bypass valve core (28) is arranged in the bypass valve (12) to communicate the low-pressure oil cavity (24) and the oil delivery cavity (22). The plug-in valve cavity comprises a bypass valve cavity (13) for inserting a bypass valve (12), the oil delivery channel (4), the low-pressure oil passage (7) and the high-pressure oil passage (6) are all communicated with the bypass valve cavity (13); The bypass valve cavity (13) comprises an oil delivery cavity (22) communicated with the oil delivery channel (4), a low-pressure oil cavity (24) communicated with the low-pressure oil passage (7) and a high-pressure oil cavity (23) communicated with the high-pressure oil passage (6), in the state that the bypass valve (12) is located in the bypass valve cavity (13), a partition plate (25) is arranged on the outer wall of the bypass valve (12) to separate each adjacent oil cavity, and a bypass valve core (28) is arranged in the bypass valve (12) to communicate the low-pressure oil cavity (24) and the oil delivery cavity (22).

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