Pressing pump

Abstract

To provide a pressing pump capable of maintaining stable and smooth operation of a piston in a pressing process of the pressing pump.SOLUTION: The pressing pump includes a pump housing, a piston, a pump rod, and a pressing sleeve, where: a pumping cavity is formed within the pump housing; the piston is arranged within the pumping cavity and connected to the piston on an inner wall of the pumping cavity; a first end of the pump rod is connected to the piston; the pressing sleeve is arranged to cover an outer circumference of a second end of the pump rod; a gap is formed between the pressing sleeve and the pump rod; and an inner circumference of the pressing sleeve and an outer circumference of the pump rod are engaged with each other to realize two-way motion limitation in a length direction of the pump rod. The invention can maintain stable and smooth operation of the piston in the pressing process of the pressing pump.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to the technical field of pumps, and more particularly to pressure pumps. [Background technology]

[0002] A pressure pump is a core component of a pressure-type packaging bottle such as an emulsion bottle. The pressure pump is integrally attached to the cap of the packaging bottle and can eject paste-like or liquid materials such as emulsions, greatly improving the convenience of use for users.

[0003] A Chinese utility model invention with publication number CN210455794U discloses a new pump core for an emulsion bottle, the technical main features of which are that it comprises a pressing sleeve, a connecting rod, a connector and a pump body, the connecting rod is inserted into the pressing sleeve and is rotatably connected to the pressing sleeve, a piston is fitted into the lower end of the connecting rod, a water seal chamber is provided at the lower end of the pump body, a water seal sheet is attached in the water seal chamber, a liquid suction port is provided below the water seal chamber, the connector is pressed and inserted into the pump body, the pressing sleeve is inserted into the connector, a spring is fitted into the pressing sleeve, and the spring is provided between the pressing sleeve and the connector.

[0004] The piston is the core member of the entire pump core structure, and the piston generates a sealed piston movement between the piston and the inner wall of the pump body to realize the extraction and pumping of liquid materials. The sealed state between the piston and the pump body is the key to the normal operation of the entire pump body.

[0005] In the conventional pressure pump, the pressure sleeve and the connecting rod are fixed to each other by interference fitting. In use, the pressure sleeve drives the connecting rod to drive the piston, thereby generating the pumping action of the piston.

[0006] However, if the direction of the pressure received by the pressure sleeve is inclined at a certain angle, the inclined pressure sleeve drives the connecting rod to oscillate in sync, and the oscillating connecting rod further drives the piston to generate an oscillation of a corresponding degree of fluctuation. As a result, oscillation of a certain degree of fluctuation is likely to occur between the piston and the inner wall of the pump body, which may affect the sealing condition between the moving piston and the inner wall of the pump body.

[0007] In order to avoid the adverse effects of the risk of leakage between the piston and the inner wall of the pump body, it is necessary to improve the fitting precision between the piston and other components therein, and to reduce the impact of the vibrations generated by the pressing sleeve, the connecting rod and the piston with higher precision. However, improving the fitting precision of the fitting parts will greatly increase the manufacturing cost of the pressing pump, and the above problem cannot be effectively solved.

[0008] Therefore, it is necessary to propose a new means for solving this problem. Summary of the Invention [Problem to be solved by the invention]

[0009] SUMMARY OF THE PRESENT DISCLOSURE In order to solve the above problems, an object of the present invention is to provide a pressure pump that can maintain stable and smooth operation of a piston during pressure application of the pressure pump. [Means for solving the problem]

[0010] The above technical object of the present invention can be achieved by the following technical solution: A pressure pump comprising: a pump housing, a piston, a pump rod, and a pressure sleeve, a pump pressure chamber is provided within the pump housing, the piston is provided within the pump pressure chamber and is connected to the piston on the inner wall of the pump pressure chamber, a first end of the pump rod is connected to the piston, the pressure sleeve is provided to cover an outer periphery of a second end of the pump rod, a gap is formed between the inner periphery of the pressure sleeve and the outer periphery of the pump rod to allow relative movement, and the pressure sleeve and the pump rod are engaged with each other to achieve bidirectional interlocking in the longitudinal direction of the pump rod.

[0011] In the present invention, furthermore, a regulating protrusion is provided on the inner circumference of the pressing sleeve, and a regulating groove is provided on the outer circumference of the pump rod, the regulating protrusion is engaged with the regulating groove, and the pump rod has a movable space in the longitudinal direction.

[0012] In the present invention, furthermore, the restriction groove has an annular structure, and the restriction protrusion has an annular structure that fits into the restriction groove.

[0013] In the present invention, further, the regulating protrusion has a first regulating surface facing the piston and a second regulating surface facing away from the piston, and the regulating groove has a third regulating surface facing away from the piston and a fourth regulating surface facing the piston, the third regulating surface facing the first regulating surface and the fourth regulating surface facing the second regulating surface.

[0014] In the present invention, further, the regulating protrusion has a first regulating surface facing the piston, the first regulating surface being a flare shape that gradually expands toward the piston, and the regulating groove has a third regulating surface facing the first regulating surface, the third regulating surface being a flare shape that gradually expands toward the piston and is compatible with the first regulating surface.

[0015] In the present invention, the first end of the pump rod is further formed into a throttle portion that gradually narrows toward the piston.

[0016] In the present invention, the restricting projection has a plurality of notches formed therein, and the restricting projection is formed into a plurality of bumps that are distributed at intervals in an annular shape.

[0017] In the present invention, furthermore, a notch is formed in the first end of the pump rod, and the notch extends toward the second end up to the regulating groove.

[0018] In the present invention, the regulating groove has a lower surface facing the inner periphery, and the regulating protrusion has an upper surface facing the outer periphery, the upper surface and the lower surface facing each other to form a gap.

[0019] The present invention further includes a spring, a one-way valve, and a mounting sleeve, wherein the spring elastically acts on the pressure sleeve in a direction away from the piston, the pump housing has a liquid supply port, the one-way valve is provided at the liquid supply port and is used to conduct liquid in one direction toward the pump pressure chamber, the pump housing has a mounting port, the mounting sleeve has a ring structure and is attached to the mounting port and is used to press and restrict the piston, and the pressing sleeve extends from the pump housing by the inner periphery of the mounting sleeve.

[0020] In the present invention, further, the piston has an annular structure, an outer periphery is connected to the piston on the inner wall of the pump pressure chamber and an inner periphery is provided covering the outer periphery of the pump rod, the piston is slidably adjustable along the longitudinal direction of the pump rod and has a sliding stroke relative to the pump rod, a regulating holder is fixedly connected to an end of the second end of the pump rod, a tapered protrusion is formed between the regulating holder and the pump rod, the sliding stroke of the piston is regulated by the regulating holder and the pressing sleeve, the pump rod has a valve hole opened toward the second end, and a through hole communicating with the valve hole is opened at a position near the regulating holder on the outer periphery of the second end of the valve rod, and the piston abuts against the regulating holder during the sliding stroke to close the through hole, and abuts against the pressing sleeve to open the through hole. Effect of the Invention

[0021] As described above, the present invention has the following beneficial effects:

[0022] A movable interlocking structure is used between the pressing sleeve and the pump rod, which reduces the effect of the tilting oscillation received by the pressing sleeve being directly transmitted to the piston, reduces the oscillation fluctuation generated by the piston, and ensures that the piston can operate stably and normally. A gap is provided between the pressing sleeve and the pump rod that allows them to move relative to each other, so that the tilting oscillation pressing force received by the pressing sleeve is absorbed by the independent oscillation of the pressing sleeve, which reduces the tilting oscillation generated by the pump rod, and the effect of the tilting oscillation of the pump rod on the piston is accordingly reduced, and the downward biasing force of the pressing sleeve can still be transmitted by pressing against each other, ensuring that the stable and smooth operation of the pump rod and the piston can be achieved. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view of a pressure pump according to the present invention. [Diagram 2] 1 is a cross-sectional view of a pressure pump according to the present invention. [Diagram 3] FIG. 2 is a schematic diagram of a connection structure between a pressing sleeve and a pump rod according to the present invention. [Figure 4] FIG. 2 is an exploded view of the pressure pump according to the present invention. [Diagram 5] FIG. 2 is an exploded cross-sectional view of the pressure pump according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, the technical solutions of the embodiments of the present invention will be described clearly and comprehensively with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part, not all, of the embodiments of the present invention. All other embodiments that a person skilled in the art can obtain based on the embodiments of the present invention without creative ingenuity are all within the protection scope of the present invention.

[0025] This embodiment discloses a pressure pump, which, as shown in Figs. 1 to 5, comprises a pump housing 1, a piston 2, a pump rod 3, a pressure sleeve 4, a spring, a one-way valve 6, and a mounting sleeve 5. Each component is combined with another to form a pressure pump, which can realize pumping of liquid material by pressure.

[0026] The pump housing 1 has a cylindrical structure with a hollow pump pressure chamber 13 disposed therein. The pump pressure chamber 13 has a cylindrical structure, and the piston 2 and the pump pressure chamber 13 fit together. The piston 2 is attached within the pump pressure chamber 13 and forms a connecting structure for the piston 2 together with the inner wall of the pump pressure chamber 13.

[0027] The pump housing 1 has a liquid supply port 11 at one end through which liquid material can enter the pump pressure chamber 13, and an attachment port 12 at the other end for attaching other members. A one-way valve 6 comprising a support ring 62, a one-way plug 61, and a connecting piece 63 is attached to the liquid supply port 11. The one-way plug 61 is connected to the inner circumference of the support ring 62 via the connecting piece 63, and can adjust the fluctuation of the one-way valve 6.

[0028] The support ring 62 is fitted and fixed at a position inside the liquid supply port 11, and the one-way plug 61 has a semispherical structure and abuts against the inside of the liquid supply port 11, realizing the pressing and sealing of the liquid supply port 11. In the process of liquid supply port 11 supplying liquid toward the pump pressure chamber 13, the one-way plug 61 is pushed up by the liquid material, realizing one-way liquid supply at the liquid supply port 11, and while the pump pressure chamber 13 is receiving pressure, the one-way plug 61 is pushed toward the liquid supply port 11 by the liquid material, realizing one-way closure at the liquid supply port 11.

[0029] The mounting sleeve 5 has an annular structure and is mounted on the mounting port 12. A part of the mounting sleeve 5 is inserted into the mounting port 12 to realize mounting, and can be engaged and fixed with the mounting port 12. The mounting sleeve 5 regulates the movement stroke of the piston 2, and stably regulates the piston 2 in the pump pressing chamber 13. The outer peripheral dimension of the pressing sleeve 4 and the inner peripheral dimension of the mounting sleeve 5 are compatible with each other, so that the pressing sleeve 4 can be smoothly adjusted for pressing.

[0030] The longitudinal direction of the pump rod 3 is arranged along the moving direction of the piston 2, and the piston 2 and the pressing sleeve 4 can be connected to each other via the pump rod 3, so that the pressing sleeve 4 can drive the movement of the piston 2. The pump rod 3 has a first end 301 inserted into the piston 2 and connected to the piston 2, and a second end 302 extending toward the pressing sleeve 4 and connected to the pressing sleeve 4.

[0031] The piston 2 has an annular structure, with its outer periphery connected to the inner wall of the pump pressure chamber 13 and its inner periphery covering the outer periphery of the pump rod 3. The piston 2 is slidably adjustable along the longitudinal direction of the pump rod 3 and has a sliding stroke relative to the pump rod 3, so as to realize pumping of the piston 2 during the sliding movement of the piston 2 relative to the pump housing 1.

[0032] At the end position of the second end 302 of the pump rod 3, a restricting holder 31 is formed protruding outward, and the restricting holder 31 has an annular structure, which can restrict the movement of the piston 2. A tapered protrusion 32 is formed between the restricting holder 31 and the pump rod 3, and in the process of the piston 2 moving toward the restricting holder 31, the lower end surface of the piston 2 and the tapered protrusion 32 can be pressed against each other, thereby realizing a seal between the piston 2 and the pump rod 3.

[0033] The sliding stroke of the piston 2 relative to the pump rod 3 is regulated by the regulating holder 31 and the pressing sleeve 4, and the upper end of the piston 2 is received and regulated by the underside of the pressing sleeve 4, and the lower end is received and regulated by the regulating holder 31 and the tapered protrusion 32. A valve hole 33 opening toward the second end 302 is formed inside the pump rod 3, and a through hole 34 is formed at a position near the regulating holder 31 on the outer periphery of the second end 302 of the valve rod, and communicates with the valve hole 33 via the through hole 34, thereby realizing communication between the valve hole 33 and the outer periphery of the pump rod 3.

[0034] When the piston 2 moves downward relative to the pump rod 3 during a sliding stroke and then abuts against the regulating holder 31, it abuts against the tapered protrusion 32, achieving a seal between the piston 2 and the pump rod 3 and closing the through hole 34. When the piston 2 moves upward relative to the pump rod 3 and then abuts against the pressing sleeve 4, the tapered protrusions are separated from each other, and the through hole 34 is opened, whereby the pump rod 3 can discharge the liquid material.

[0035] The spring is attached so as to cover a position (not shown) on the outer periphery of the pressing sleeve 4, and both ends of the spring press the pressing sleeve 4 and the stepped surface of the mounting sleeve 5 against each other. The spring can act elastically on the pressing sleeve 4 in a direction away from the piston 2, so that the pressing sleeve 4 can automatically return to its original elastic state after being pressed. In addition, after the pressing sleeve 4 returns to its original position, the piston 2 is restricted by the mounting sleeve 5, so that the through hole 34 on the outer periphery of the first end 301 of the pump rod 3 can be closed.

[0036] A movable connecting structure is formed between the pressing sleeve 4 and the pump rod 3, the pressing sleeve 4 is provided to cover the outer periphery of the second end 302 of the pump rod 3, and a gap 7 is formed between the inner periphery of the pressing sleeve 4 and the outer periphery of the pump rod 3, so that the pressing sleeve 4 and the pump rod 3 can generate a mutual tilting and swinging movement between their moving positions. During the pressing of the pump rod 3 by the pressing sleeve 4, the pump rod 3 realizes axial support via the piston 2, and maintains a stable connection state between the piston 2 and the pump pressing chamber 13. Even when the tilting and swinging movement occurs during pressing, the pressing sleeve 4 can be driven to press down the pump rod 3, and then, during the ascent, the pressing sleeve 4 can also drive the pump rod 3 to return, thereby maintaining a bidirectional interlocking between the pressing sleeve 4 and the pump rod 3 during pressing and ascent.

[0037] By engaging the inner periphery of the pressing sleeve 4 with the outer periphery of the pump rod 3, force is transmitted between the pressing sleeve 4 and the pump rod 3, thereby realizing the restriction of bidirectional movement of the pump rod 3 in the longitudinal direction.

[0038] As shown in Figs. 2 to 5, a restricting protrusion 41 is provided on the inner circumference of the pressing sleeve 4, and a restricting groove 35 is provided on the outer circumference of the pump rod 3. The restricting protrusion 41 and the restricting groove are fitted to each other, so that the restricting protrusion 41 can be engaged in the restricting groove 35, and the pump rod 3 and the pressing sleeve 4 are engaged with each other. The restricting protrusion 41 needs to be smaller than the restricting groove 35, so that a movable space 8 is formed between the restricting protrusion 41 and the restricting groove 35, and the movable space 8 in the longitudinal direction of the pump rod 3 can be formed between the pressing sleeve 4 and the pump rod 3. The pressing sleeve 4 generates an adaptive tilting swing while receiving pressure, and the pressing sleeve 4 does not drive the pump rod 3 to tilt and swing, so that the pump rod 3 can still move stably following the piston 2, and further, the tilting swing of the piston 2 is not caused, and the smooth and stable movement of the piston 2 can be maintained.

[0039] This regulating groove 35 has an annular structure, and the regulating protrusion 41 has an annular structure that fits into the regulating groove 35, thereby forming an annular engagement structure between the pressing sleeve 4 and the pump rod 3, and the connection state between the pressing sleeve 4 and the pump rod 3 can be stably maintained.

[0040] The restricting protrusion 41 has a first restricting surface 411 facing the piston 2 and a second restricting surface 412 facing away from the piston 2. The restricting groove 35 also has a third restricting surface 351 and a fourth restricting surface 352, and the third restricting surface 351 and the first restricting surface 411 face each other and can press against each other, thereby transmitting a pressure toward the piston 2, and the fourth restricting surface 352 and the second restricting surface 412 face each other and can press against each other, thereby transmitting a pressure facing away from the piston 2, and the interlocking between the pressing sleeve 4 and the pump rod 3 can be realized by the transmission of pressure between the respective restricting surfaces.

[0041] The regulating groove 35 further has a lower surface 353 facing the inner circumference, and the lower surface 353 has an annular structure, while the regulating protrusion 41 has an upper surface 413 facing the outer circumference, and the upper surface 413 also has an annular structure. The upper surface 413 and the lower surface 353 face each other, and a gap 7 is formed between them. This gap 7 allows an adaptive tilting and swinging motion to occur between the regulating protrusion 41 and the regulating groove 35, and maintains a movable interlocking structure between the pressing sleeve 4 and the pump rod 3.

[0042] Furthermore, the first restriction surface 411 of the restriction protrusion 41 is a flare shape gradually expanding toward the piston 2, and the third restriction surface 351 of the restriction groove 35 is a flare shape gradually expanding toward the piston 2, and the first restriction surface 411 and the third restriction surface 351 fit each other and form a tapered structure provided covering each other. On the one hand, the tapered structure can generate a certain centering action between the first restriction surface 411 and the second restriction surface 412 while the pressing sleeve 4 is being pressed down, thereby improving the stability during pressing of the pressing sleeve 4, and on the other hand, the flare-shaped first restriction surface 411 can form a guide structure, and the pump rod 3 can act as a guide while being pressed against the pressing sleeve 4, thereby improving the smoothness of the engagement between them.

[0043] Furthermore, the first end 301 of the pump rod 3 is formed with a throttle portion (37) that gradually narrows toward the piston 2, and the throttle portion 37 can also function as an inclined guide structure. The tapered throttle portion 37 and the first regulating surface 411 fit together to further improve the smoothness of engagement between the pressing sleeve 4 and the pump body.

[0044] Furthermore, the regulating protrusion 41 is provided with a number of notches 42, which can divide the regulating protrusion 41, so that the regulating protrusion 41 is formed into a number of bumps that are distributed at intervals in an annular shape. The bumps are of an arc-shaped structure, and a single bump has a more flexible deformation width compared with the entire annular regulating bump, which improves the smoothness during the mutual engagement between the regulating protrusion 41 and the regulating groove 35, and is favorable for the pressing sleeve 4 and the pump rod 3 to be assembled together.

[0045] Furthermore, a notch 36 may be formed at the position of the first end 301 of the pump rod 3, and the notch 36 extends from the end face of the second end 302 toward the second end 302 of the pump rod 3 to the position of the regulating groove 35. The notch 36 can divide the position of the second end 302 of the pump rod 3 into two parts, and a deformable space is formed at the position of the notch 36, thereby improving the smoothness of engagement during engagement of the pump rod 3 with the pressing sleeve 4.

[0046] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiment, and any technical solution that belongs to the concept of the present invention belongs to the scope of protection of the present invention. In addition, any improvement or modification made by those skilled in the art without departing from the principle of the present invention should be considered as being within the scope of protection of the present invention. [Explanation of symbols]

[0047] 1. Pump housing 11, liquid supply port 12. Mounting port 13. Pump pressure chamber 2. Piston 3. Pump rod 301, 1st end 302, second end 31. Regulatory holder 32, tapered protrusion 33, valve hole 34. Through hole 35. Regulating groove 351, the third regulatory aspect 352, the fourth regulatory aspect 353, bottom surface 36. Cutout 37. Squeezing section 4. Press sleeve 41, Regulating protrusion 411, the first regulatory aspect 412, the second regulatory aspect 413, top surface 42, notch 5. Mounting sleeve 6. One-way valve 61. One-way plug 62. Support ring 63, connecting piece 7. Gap 8, movable space

Claims

1. 1. A pressure pump comprising: a pump housing (1), a piston (2), a pump rod (3), and a pressure sleeve (4), wherein a pump pressure chamber (13) is provided in the pump housing (1), the piston (2) is provided in the pump pressure chamber (13) and is connected to the piston (2) on an inner wall of the pump pressure chamber (13), a first end of the pump rod (3) is connected to the piston (2), the pressure sleeve (4) is provided to cover an outer periphery of a second end of the pump rod (3), a gap (7) is formed between an inner periphery of the pressure sleeve (4) and an outer periphery of the pump rod (3) to allow relative movement, and the pressure sleeve (4) and the pump rod (3) are engaged with each other to realize two-way interlocking in the longitudinal direction of the pump rod (3).

2. 2. The pressure pump according to claim 1, wherein a regulating protrusion (41) is provided on an inner periphery of the pressure sleeve (4), a regulating groove (35) is provided on an outer periphery of the pump rod (3), the regulating protrusion (41) is engaged with the regulating groove (35), and has a movable space (8) in the longitudinal direction of the pump rod (3).

3. 3. The pressure pump according to claim 2, wherein the restriction groove (35) has an annular structure, and the restriction protrusion (41) has an annular structure that fits into the restriction groove (35).

4. The pressure pump according to claim 2, characterized in that the regulating protrusion (41) has a first regulating surface (411) facing the piston (2) and a second regulating surface (412) facing away from the piston (2), the regulating groove (35) has a third regulating surface (351) facing away from the piston (2) and a fourth regulating surface (352) facing the piston (2), the third regulating surface (351) facing the first regulating surface (411) and the fourth regulating surface (352) facing the second regulating surface (412).

5. The pressure pump according to claim 3, characterized in that the regulating protrusion (41) has a first regulating surface (411) facing the piston (2), the first regulating surface (411) is a flare shape gradually expanding toward the piston (2), the regulating groove (35) has a third regulating surface (351) facing the first regulating surface (411), the third regulating surface (351) is a flare shape gradually expanding toward the piston (2) and is compatible with the first regulating surface (411).

6. 4. The pressure pump according to claim 3, characterized in that the first end of the pump rod (3) is formed with a throttle (37) which gradually narrows in the direction of the piston (2).

7. 4. The pressure pump according to claim 3, characterized in that the regulating projection (41) is provided with a plurality of notches (42) and is formed into a plurality of bumps distributed at intervals in an annular shape.

8. The pressure pump according to claim 3, characterized in that a notch (36) is formed in the first end of the pump rod (3), and the notch (36) extends toward the second end to the regulating groove (35).

9. The pressure pump according to claim 3, characterized in that the regulating groove (35) has a lower surface (353) facing the inner circumference, the regulating protrusion (41) has an upper surface (413) facing the outer circumference, and the upper surface (413) and the lower surface (353) face each other to form a gap (7).

10. The pump further includes a spring, a one-way valve (6), and a mounting sleeve (5), the spring elastically acts on the pressing sleeve (4) in a direction away from the piston (2), the pump housing (1) has a liquid supply port (11), the one-way valve (6) is provided in the liquid supply port (11) and is used to conduct liquid in one direction toward a pump pressing chamber (13), the pump housing (1) has a mounting port (12), the mounting sleeve (5) has an annular structure, is attached to the mounting port (12), and is used to press and restrict the piston (2), the pressing sleeve (4) extends from the pump housing (1) by the inner periphery of the mounting sleeve (5), The piston (2) has an annular structure, an outer periphery of which is connected to the piston (2) on the inner wall of the pump pressure chamber (13), and an inner periphery of which is provided to cover the outer periphery of the pump rod (3). The piston (2) is slidably adjustable along the longitudinal direction of the pump rod (3) and has a sliding stroke relative to the pump rod (3). A regulating holder (31) is fixedly connected to an end of the second end of the pump rod (3). A tapered protrusion (32) is formed between the regulating holder (31) and the pump rod (3). The sliding stroke of the piston (2) is adjusted by the regulating holder (31).

10. The pressure pump according to claim 1, wherein the pump rod (3) is provided with a valve hole (33) opened toward the second end thereof, and a through hole (34) communicating with the valve hole (33) is provided at a position near the regulating holder (31) on the outer periphery of the second end of the valve rod, the piston (2) abutting against the regulating holder (31) during a sliding stroke to close the through hole (34), and abutting against the pressing sleeve (4) to open the through hole (34).

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