CN213981169U - Split type plunger pump and electro-hydraulic tool - Google Patents
Split type plunger pump and electro-hydraulic tool Download PDFInfo
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- CN213981169U CN213981169U CN202022617756.4U CN202022617756U CN213981169U CN 213981169 U CN213981169 U CN 213981169U CN 202022617756 U CN202022617756 U CN 202022617756U CN 213981169 U CN213981169 U CN 213981169U
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- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000005086 pumping Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model provides a split type plunger pump and electronic, it includes eccentric shaft subassembly, pump body subassembly and hydro-cylinder. The pump body assembly comprises a pump body and a plurality of plungers, the pump body is provided with a plurality of plunger holes distributed along the circumferential direction, an oil groove for communicating the oil bag with the plunger holes, and pump oil holes arranged corresponding to the plunger holes, the plungers are respectively arranged in the plunger holes, and the eccentric shaft assembly drives the plungers to reciprocate; one end of the pump body, which is far away from the eccentric component, is provided with a positioning hole and a plurality of pump body connecting holes positioned on the periphery of the positioning hole. The end of the oil cylinder close to the pump body is provided with an oil cylinder shaft, a plurality of oil cylinder connecting holes and a plurality of oil inlet holes, the oil cylinder shaft is sleeved with the positioning hole on the pump body, the plurality of pump body connecting holes correspond to the plurality of oil cylinder connecting holes, and the plurality of oil inlet holes correspond to the plurality of pump oil holes. And the plurality of connecting pieces are correspondingly connected with each pump body connecting hole and each oil cylinder connecting hole. And the sealing pieces are respectively arranged on the contact surfaces of the pump oil hole and the corresponding oil inlet hole.
Description
Technical Field
The utility model relates to a hydraulic pressure field, its in particular to split type plunger pump and electro-hydraulic tool.
Background
The plunger pump is an important hydraulic device, is generally driven by a motor, converts mechanical energy of the rotary motion of a motor shaft into hydraulic energy, and has the principle that the volume of an oil cavity at the top of a plunger is changed to absorb and press oil by means of reciprocating motion of the plunger in a cylinder body. For some occasions, such as the fields of fire fighting and building, the miniaturization of tool products also requires the development of plunger pumps in the direction of miniaturization, convenience and low cost.
The existing plunger pump is mostly of an integrated structure, and the integrated plunger pump is complex in processing technology and high in processing difficulty; and requires replacement of the entire assembly as long as one of the dimensions is worn, at a high after-market cost and relatively complex after-market maintenance. In addition, most of the integrated materials are cast iron, and the whole device is heavy in weight. In addition, the existing integrated plunger pump has poor oil seal tightness of the pump body and is very easy to damage.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome prior art not enough, provide a low and convenient split type plunger pump of after-sale maintenance of processing cost and electronic hydraulic tool.
In order to achieve the above object, the utility model provides a split type plunger pump, it includes eccentric shaft subassembly, pump body subassembly and hydro-cylinder. The pump body assembly comprises a pump body and a plurality of plungers, the pump body is provided with a plurality of plunger holes distributed along the circumferential direction, an oil groove for communicating the oil bag with the plunger holes, and pump oil holes arranged corresponding to the plunger holes, the plungers are respectively arranged in the plunger holes, and the eccentric shaft assembly drives the plungers to reciprocate so as to pump oil in the oil groove out of the pump oil holes; one end of the pump body, which is far away from the eccentric component, is provided with a positioning hole and a plurality of pump body connecting holes positioned on the periphery of the positioning hole. The end of the oil cylinder close to the pump body is provided with an oil cylinder shaft, a plurality of oil cylinder connecting holes and a plurality of oil inlet holes, the oil cylinder shaft is sleeved with the positioning hole on the pump body, the plurality of pump body connecting holes correspond to the plurality of oil cylinder connecting holes, and the plurality of oil inlet holes correspond to the plurality of pump oil holes. And the plurality of connecting pieces are correspondingly connected with each pump body connecting hole and each oil cylinder connecting hole. And the sealing pieces are respectively arranged on the contact surfaces of the pump oil hole and the corresponding oil inlet hole.
According to the utility model discloses an embodiment, each plunger all includes along the pump body oil blanket that the pump body radially set gradually by outer and interior, first spring, oil movable switch, second spring and plunger core, the outer end in pump body oil blanket shutoff plunger hole, the both ends of second spring are connected respectively in the length that oil movable switch and plunger core and second spring are greater than first spring, the inner butt eccentric shaft subassembly of plunger core, oil movable switch is opened or shutoff plunger hole under the effect of first spring and second spring.
According to the utility model discloses an embodiment, pump body oil blanket is the rigidity oil blanket, and each plunger is still including setting up in the annular seal of pump body oil blanket periphery wall and plunger downthehole perisporium.
According to an embodiment of the present invention, the annular seal ring is an O-ring seal ring; or the annular sealing ring comprises an O-shaped sealing ring and a fluorine rubber check ring which are arranged in sequence.
According to the utility model discloses an embodiment, pump body subassembly has eight pump body connecting holes and two liang of formation a set ofly and correspond the both sides that set up in each plunger hole including evenly distributed in four plungers of pump body circumference on the pump body.
According to the utility model discloses an embodiment has eight pump oilholes on the pump body and two liang of formation are a set of, has four inlet ports on the hydro-cylinder, and every group of pump oilhole corresponds the setting and the sealing member sets up in the periphery of every group pump oilhole with an inlet port.
According to the utility model discloses an embodiment, eccentric shaft subassembly includes eccentric shaft and bearing, and the eccentric shaft is connected in outside driving motor, and bearing's perisporium compresses one or more plungers in proper order under the effect of eccentric shaft.
The utility model discloses another aspect still provides an electronic hydraulic tool, and it includes above-mentioned split type plunger pump.
To sum up, the utility model provides a pump body subassembly and hydro-cylinder are split type structure in the split type plunger pump, both and through the detachable connection of a plurality of connecting pieces. The pump body assembly and the oil cylinder can be independently processed by the arrangement, so that the processing difficulty and cost are greatly reduced; meanwhile, the split type arrangement also makes the replacement and maintenance of the two more convenient. The arrangement of the positioning hole on the pump body realizes the shaft positioning between the pump body assembly and the oil cylinder, ensures that the pump body assembly and the oil cylinder are in a coaxial structure after being connected, and greatly facilitates the assembly and connection of the pump body assembly and the oil cylinder. And the sealing element on the contact surface of the pump oil hole and the corresponding oil inlet hole realizes the connection sealing performance between the pump body assembly and the oil cylinder.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural view of a split plunger pump according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of fig. 1 from another view angle.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 2.
Fig. 4 is an enlarged schematic view of fig. 3 at D.
Fig. 5 is a cross-sectional view taken along line B-B of fig. 3.
Fig. 6 is a cross-sectional view taken along line C-C of fig. 3.
Fig. 7 is an enlarged schematic view of fig. 3 at E.
Detailed Description
Fig. 1 is a schematic structural view of a split plunger pump according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of fig. 1 from another view angle. Fig. 3 is a cross-sectional view taken along line a-a of fig. 2. Fig. 4 is an enlarged schematic view of fig. 3 at D. Fig. 5 is a cross-sectional view taken along line B-B of fig. 3. Fig. 6 is a cross-sectional view taken along line C-C of fig. 3. Fig. 7 is an enlarged schematic view of fig. 3 at E. Please refer to fig. 1 to 7.
As shown in fig. 1 to 7, the present invention provides a split plunger pump, which comprises an eccentric shaft assembly 1, a pump body assembly 2, an oil cylinder 3, a plurality of connecting members 4 and a plurality of sealing members 5. The pump body assembly 2 comprises a pump body 21 and a plurality of plungers 22, the pump body 21 is provided with a plurality of plunger holes 211 distributed along the circumferential direction, an oil groove 212 communicating the oil bag with the plunger holes 211, and pump oil holes 213 correspondingly arranged with the plunger holes 211, the plurality of plungers 22 are respectively arranged in the plunger holes 211, and the eccentric shaft assembly 1 drives the plurality of plungers 22 to reciprocate so as to pump oil in the oil groove 212 out of the pump oil holes 213. One end of the pump body 21 remote from the eccentric assembly 1 has a positioning hole and a plurality of pump body attachment holes 214 located on the periphery of the positioning hole. One end of the oil cylinder 3 close to the pump body 21 is provided with an oil cylinder shaft 31, a plurality of oil inlet holes 32 and a plurality of oil cylinder connecting holes 33, the oil cylinder shaft 31 is sleeved with a positioning hole on the pump body 21, the plurality of pump body connecting holes 214 are arranged corresponding to the plurality of oil cylinder connecting holes 33, and the plurality of oil inlet holes 32 are arranged corresponding to the plurality of pump oil holes 213. A plurality of connecting members 4 are correspondingly connected to each of the pump body connecting hole 214 and the cylinder connecting hole 33. The plurality of seals 5 are respectively provided on the contact surfaces of the pump oil hole 213 and the corresponding oil inlet hole 32.
In the split plunger pump provided by the embodiment, the plurality of connecting pieces 4 are detachably connected with the corresponding pump body connecting hole 214 and the plurality of oil cylinder connecting holes 33, so that the detachable connection of the pump body 21 and the oil cylinder 3 is realized; the coaxial assembly of pump body subassembly 2 and hydro-cylinder 3 has then greatly made things convenient for to the setting of locating hole on the pump body 21, greatly reduced split type connected degree of difficulty. Meanwhile, the sealing performance of the oil path is ensured by the arrangement of the sealing element 5 on the contact surface of the pump oil hole 213 and the corresponding oil inlet hole 32. The split pump body 21 and the oil cylinder 3 are convenient to process and low in cost; and also greatly facilitates after-sale maintenance.
In this embodiment, the pump body 21 has four plunger holes 211 uniformly distributed along the circumferential direction, and the split plunger pump is a four-plunger pump. However, the present invention is not limited to this. In other embodiments, the pump body 21 may have one, two, three, or more than five plunger holes. In the process of pumping oil, the plunger 22 needs to do reciprocating motion, and in order to improve the connection strength between the pump body 21 and the oil cylinder 3, eight pump body connection holes 214 are correspondingly formed in the pump body 21; and eight pump body connection holes 214 are formed in pairs in a group and are correspondingly disposed at both sides of each plunger hole 211. Furthermore, the two pump body connecting holes 214 on the two sides of the plunger hole 211 tightly press the pump oil hole 213 and the oil inlet hole 32 on the oil cylinder, so that the sealing performance of the two is improved.
In the present embodiment, as shown in fig. 6 and 7, the pump body 21 has eight pumping holes 213 and two pumping holes are formed in a group, the cylinder 3 has four oil inlets 32, each group of pumping holes 213 and one oil inlet 32 are correspondingly disposed, and the sealing member 5 is disposed on the periphery of each group of pumping holes 213. This setting ensures that the oil that two pump oilholes 213 pump can all get into the hydro-cylinder through inlet port 32 that corresponds, has avoided the oil leak of both junctions. Preferably, the sealing member 5 is an O-ring. However, the utility model discloses do not do any restriction to the quantity of pump oilhole. In other embodiments, each group of pumping oil holes may include only one pumping oil hole, and each pumping oil hole is coaxially arranged with the corresponding oil inlet hole on the oil cylinder; alternatively, each set of pumping holes may also include more than three pumping holes.
In the present embodiment, the eccentric shaft assembly 1 includes an eccentric shaft 11 and a needle bearing 12, the eccentric shaft 11 is connected to an external driving motor, and the peripheral wall of the needle bearing 12 sequentially compresses one or more plungers 22 by the action of the eccentric shaft 11. As shown in fig. 4, each plunger 22 includes a pump body oil seal 221, a first spring 222, an oil piston 223, a second spring 224 and a plunger core 225, which are arranged in sequence from outside to inside along the radial direction of the pump body 21, the pump body oil seal 221 seals the outer end of the plunger hole 211, two ends of the second spring 224 are respectively connected with the oil piston 223 and the plunger core 225, the length of the second spring 224 is greater than that of the first spring 222, the inner end of the plunger core 225 abuts against the peripheral wall of the needle bearing 12, and the oil piston 223 opens or seals the plunger hole 211 under the action of the first spring 222 and the second spring 224. Specifically, the method comprises the following steps: when the needle roller bearing 12 abuts and compresses the plunger core 225 of one of the plungers and compresses the corresponding second spring 224, the second spring 224 generates a restoring force radially outward, the restoring force drives the oil piston 223 to move outward, the plunger hole 211 is opened and the first spring 222 is compressed, and oil of the oil groove 212 continuously enters the plunger hole 211. Since the pump body oil seal 221 seals the outer end of the plunger hole 211, the oil entering the plunger hole 211 can only be pumped out through the pump oil hole 213 and enter the oil inlet hole 32 of the oil cylinder. When the needle bearing 12 is away from the plunger 22 by the eccentric shaft 11, the restoring force of the first spring 222 drives the oil piston 223 to move inward and block the plunger hole 211, and the corresponding pump oil hole 213 of the plunger 22 no longer pumps oil.
In this embodiment, the pump body oil seal 221 is a rigid oil seal made of 45# steel, and compared with a conventional plastic oil seal, the rigid pump body oil seal 221 greatly improves the sealing performance and the service life of the pump body. To improve the sealing performance, each plunger 22 further includes an annular seal ring 226 disposed on the outer peripheral wall of the pump body oil seal 221 and the inner peripheral wall of the plunger hole 211. Preferably, the ring seals include a fluorine gasket 2261 and an O-ring seal 2262 disposed radially inward from the pump body. However, the present invention is not limited to this. In other embodiments, the annular seal may comprise only an O-ring seal.
Correspondingly, this embodiment still provides an electronic hydraulic tool, and this electronic hydraulic tool includes motor element, above-mentioned split type plunger pump, push away axle subassembly and working head subassembly, and motor element connects in the eccentric shaft subassembly, and the push away axle subassembly sets up in the hydro-cylinder, and reciprocating motion has processed the material that is located working head subassembly under the effect of fluid in the hydro-cylinder.
To sum up, the utility model provides a pump body subassembly and hydro-cylinder are split type structure in the split type plunger pump, both and through the detachable connection of a plurality of connecting pieces. The pump body assembly and the oil cylinder can be independently processed by the arrangement, so that the processing difficulty and cost are greatly reduced; meanwhile, the split type arrangement also makes the replacement and maintenance of the two more convenient. The arrangement of the positioning hole on the pump body realizes the shaft positioning between the pump body assembly and the oil cylinder, ensures that the pump body assembly and the oil cylinder are in a coaxial structure after being connected, and greatly facilitates the assembly and connection of the pump body assembly and the oil cylinder. And the sealing element on the contact surface of the pump oil hole and the corresponding oil inlet hole realizes the connection sealing performance between the pump body assembly and the oil cylinder.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of other modifications and variations without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A split plunger pump, comprising:
an eccentric shaft assembly;
the pump body assembly comprises a pump body and a plurality of plungers, the pump body is provided with a plurality of plunger holes distributed along the circumferential direction, an oil groove for communicating the oil bag with the plunger holes, and pump oil holes arranged corresponding to the plunger holes, the plungers are respectively arranged in the plunger holes, and the eccentric shaft assembly drives the plungers to reciprocate so as to pump oil in the oil groove out of the pump oil holes; one end of the pump body, which is far away from the eccentric assembly, is provided with a positioning hole and a plurality of pump body connecting holes positioned on the periphery of the positioning hole;
the oil cylinder is provided with an oil cylinder shaft, a plurality of oil cylinder connecting holes and a plurality of oil inlet holes at one end, close to the pump body, of the oil cylinder, the oil cylinder shaft is sleeved with the positioning holes on the pump body, the plurality of pump body connecting holes are arranged corresponding to the plurality of oil cylinder connecting holes, and the plurality of oil inlet holes are arranged corresponding to the plurality of pump oil holes;
the connecting pieces are correspondingly connected with each pump body connecting hole and each oil cylinder connecting hole;
and the sealing pieces are respectively arranged on the contact surfaces of the pump oil hole and the corresponding oil inlet hole.
2. The split plunger pump according to claim 1, wherein each plunger comprises a pump body oil seal, a first spring, an oil-piston switch, a second spring and a plunger core which are sequentially arranged from outside to inside along the radial direction of the pump body, the pump body oil seal blocks the outer end of the plunger hole, two ends of the second spring are respectively connected to the oil-piston switch and the plunger core, the length of the second spring is larger than that of the first spring, the inner end of the plunger core abuts against the eccentric shaft assembly, and the oil-piston switch opens or blocks the plunger hole under the action of the first spring and the second spring.
3. The split plunger pump of claim 2, wherein the pump body oil seal is a rigid oil seal, and each plunger further comprises an annular seal ring disposed on an outer peripheral wall of the pump body oil seal and an inner peripheral wall of the plunger hole.
4. The split plunger pump of claim 3, wherein the annular sealing ring is an O-ring; or the annular sealing ring comprises an O-shaped sealing ring and a fluorine rubber check ring which are arranged in sequence.
5. The split plunger pump according to claim 1, wherein the pump body assembly comprises four plungers uniformly distributed in the circumferential direction of the pump body, and the pump body is provided with eight pump body connecting holes, two of the pump body connecting holes form a group, and the pump body connecting holes are correspondingly arranged on two sides of each plunger hole.
6. The split plunger pump of claim 1, wherein the pump body has eight pumping holes and two pumping holes form a group, the cylinder has four oil inlets, each group of pumping holes and one oil inlet are disposed correspondingly, and the sealing member is disposed at the periphery of each group of pumping holes.
7. The split-type plunger pump of claim 1, wherein the eccentric shaft assembly comprises an eccentric shaft and a needle bearing, the eccentric shaft is connected to an external driving motor, and a circumferential wall of the needle bearing sequentially compresses the one or more plungers by the eccentric shaft.
8. An electro-hydraulic tool comprising the split type plunger pump according to claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022617756.4U CN213981169U (en) | 2020-11-12 | 2020-11-12 | Split type plunger pump and electro-hydraulic tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022617756.4U CN213981169U (en) | 2020-11-12 | 2020-11-12 | Split type plunger pump and electro-hydraulic tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981169U true CN213981169U (en) | 2021-08-17 |
Family
ID=77262972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022617756.4U Active CN213981169U (en) | 2020-11-12 | 2020-11-12 | Split type plunger pump and electro-hydraulic tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981169U (en) |
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2020
- 2020-11-12 CN CN202022617756.4U patent/CN213981169U/en active Active
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| GR01 | Patent grant | ||
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Denomination of utility model: Split piston pump and electric hydraulic tools Effective date of registration: 20231123 Granted publication date: 20210817 Pledgee: Zhejiang Xiaoshan Rural Commercial Bank Co.,Ltd. Daicun Branch Pledgor: EUROPEAN SHIELD TECHNOLOGY CO.,LTD. Registration number: Y2023980067294 |