Pressure 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] The 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] The Chinese utility model invention with publication number CN210455794U discloses a novel pump core for emulsion bottles, the technical key features of which are as follows: 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 to 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 within the water seal chamber; a liquid suction port is provided below the water seal chamber; the connector is pressed onto the pump body; the pressing sleeve is inserted into the connector; a spring is fitted onto the pressing sleeve; and the spring is provided between the pressing sleeve and the connector.

[0004] The piston is the core of the entire pump core structure, and the sealed piston movement between the piston and the inner wall of the pump body realizes 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 conventional pumps, the pressure sleeve and the connecting rod are fixed to each other through an interference fit, and in use, the pressure sleeve drives the connecting rod to drive the piston, thereby generating a pumping motion.

[0006] However, if the direction of the pressure applied to the pressure sleeve is tilted at a certain angle, the tilted pressure sleeve will drive the connecting rod to oscillate at an angle in sync, and the oscillating connecting rod will further drive the piston to oscillate to a corresponding degree of fluctuation. As a result, 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 of the piston and other components therein, and to reduce the impact of vibrations occurring in the pressure sleeve, connecting rod, and piston with higher precision. However, improving the fitting precision of the components will significantly increase the manufacturing cost of the pressure pump, and will not effectively solve the above problem.

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

[0009] SUMMARY OF THE INVENTION 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 defined within the pump housing, the piston located within the pump pressure chamber and connected to the piston on the inner wall of the pump pressure chamber, a first end of the pump rod connected to the piston, the pressure sleeve covering an outer periphery of a second end of the pump rod, a gap defining a relative movement between the inner periphery of the pressure sleeve and the outer periphery of the pump rod, the pressure sleeve and the pump rod engaging with each other to achieve bidirectional movement 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, 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, furthermore, 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, the regulating protrusion further has a first regulating surface facing the piston, the first regulating surface being flared so as to gradually widen toward the piston, and the regulating groove has a third regulating surface facing the first regulating surface, the third regulating surface being flared so as to gradually widen toward the piston, and being compatible with the first regulating surface.

[0015] In the present invention, the first end of the pump rod is connected to a piston. move away from It is formed in a narrowed portion that gradually narrows in the direction.

[0016] In the present invention, the restricting protrusion is further provided with a plurality of notches, and the restricting protrusion is provided with a plurality of recesses that are distributed at intervals in an annular shape. By protrusion is formed.

[0017] In the present invention, a notch is formed in the first end of the pump rod, and the notch is formed in the second end of the pump rod. from It extends to the restriction groove.

[0018] In the present invention, the restricting groove has a lower surface facing the inner periphery, and the restricting 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 pressing 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 pressing chamber, the pump housing has a mounting port, the mounting sleeve has an annular 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, the piston has an annular structure, its outer periphery is connected to the piston on the inner wall of the pump pressure chamber, and its inner periphery is provided to cover 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, and a tapered protrusion is formed between the regulating holder and the pump rod, and the sliding stroke of the piston is regulated by the regulating holder and the pressing sleeve, and the pump rod is provided with a valve hole opened toward the second end, Pump rodA through hole communicating with the valve hole is provided at a position on the outer periphery of the second end near the regulating holder, 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. [Effects of the Invention]

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

[0022] A movable interlocking structure is used between the pressure sleeve and the pump rod, which reduces the impact of the tilting vibration of the pressure sleeve being directly transmitted to the piston, reducing the vibration fluctuations generated by the piston and ensuring stable and normal operation of the piston. A gap is provided between the pressure sleeve and the pump rod to allow relative movement, so that the tilting vibration pressing force received by the pressure sleeve is absorbed by the independent vibration of the pressure sleeve, reducing the tilting vibration generated by the pump rod and correspondingly reducing the impact of the pump rod's tilting vibration on the piston. Furthermore, the downward biasing force of the pressure sleeve can still be transmitted by pressing against each other, ensuring stable and smooth operation of the pump rod and piston. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of a pressure pump according to the present invention; [Figure 2] 1 is a cross-sectional view of a pressure pump according to the present invention. [Figure 3] 1 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. [Figure 5] 1 is an exploded cross-sectional view of a pressure pump according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, the technical solutions according to 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 of the embodiments of the present invention, not all of them, and all other embodiments that a person skilled in the art can obtain based on the embodiments of the present invention without creative ingenuity fall within the protection scope of the present invention.

[0025] This embodiment discloses a pressure pump, which, as shown in Figures 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 pump liquid materials by pressure.

[0026] The pump housing 1 has a cylindrical structure in which a hollow pump pressure chamber 13 is provided. 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 inside 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 the liquid material can enter the pump pressure chamber 13, and an attachment port 12 at the other end for attaching other components. 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 periphery of the support ring 62 via the connecting piece 63, and can adjust the fluctuation of the one-way valve 6.

[0028] Support ring 62 is fitted and fixed at a position inside liquid supply port 11, and one-way plug 61 has a hemispherical structure and abuts against the inside of liquid supply port 11, pressing against liquid supply port 11 to seal it. When liquid supply port 11 supplies liquid toward pump pressure chamber 13, one-way plug 61 is pushed up by the liquid material, realizing one-way liquid supply at liquid supply port 11, and when pump pressure chamber 13 is under pressure, one-way plug 61 is pushed toward liquid supply port 11 by the liquid material, realizing one-way closure at liquid supply port 11.

[0029] The mounting sleeve 5 has an annular structure and is mounted in the mounting port 12. A portion of the mounting sleeve 5 is inserted into the mounting port 12 to achieve mounting, and the mounting sleeve 5 and the mounting port 12 can be engaged and fixed together. The mounting sleeve 5 regulates the movement stroke of the piston 2, and stably regulates the piston 2 within the pump pressure chamber 13. The outer circumferential dimensions of the pressure sleeve 4 and the inner circumferential dimensions of the mounting sleeve 5 are compatible with each other, thereby realizing smooth pressure adjustment of the pressure sleeve 4.

[0030] The longitudinal direction of the pump rod 3 is arranged along the direction of movement 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, and its outer periphery is connected to the inner wall of the pump pressure chamber 13. Contact , the inner periphery of which is provided so as 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, so that the piston 2 pumps during its sliding movement relative to the pump housing 1.

[0032] Pump rod 3 1st end 301 At the end of the piston 2, a restricting holder 31 is formed that protrudes 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 as the piston 2 moves 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 restricted by the restricting holder 31 and the pressing sleeve 4, and the upper end of the piston 2 is received and restricted by the underside of the pressing sleeve 4, and the lower end is received and restricted by the restricting holder 31 and the tapered protrusion 32. A valve hole 33 is formed inside the pump rod 3 and is open toward the second end 302. Pump Rod 3 A through hole 34 is formed on the outer periphery of the second end 302 at a position near the restriction holder 31 , and the valve hole 33 is connected to the through hole 34 via the through hole 34 , thereby realizing communication between the valve hole 33 and the outer periphery of the pump rod 3 .

[0034] During the sliding stroke, the piston 2 moves downward relative to the pump rod 3 and then abuts against the restriction holder 31, whereupon 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. The piston 2 moves upward relative to the pump rod 3 and then abuts against the pressing sleeve 4, whereon it abuts against the tapered protrusion 32. Part 32 By separating the through holes 34 from each other and opening the through holes 34, the pump rod 3 can discharge the liquid material.

[0035] This 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 against the pressing sleeve 4 and the stepped surface of the mounting sleeve 5. The spring acts 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 position after being pressed. Furthermore, after the pressing sleeve 4 returns, 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 coupling structure is formed between the pressing sleeve 4 and the pump rod 3. The pressing sleeve 4 is disposed over 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, allowing the pressing sleeve 4 and the pump rod 3 to move in a tilting and swinging manner relative to each other. While the pressing sleeve 4 is pressing the pump rod 3, the pump rod 3 is axially supported by the piston 2, maintaining a stable connection between the piston 2 and the pump pressing chamber 13. Even when tilting and swinging occurs during pressing, the pressing sleeve 4 can be driven to press down the pump rod 3, and then, as it rises, the pressing sleeve 4 can drive the pump rod 3 to return, thereby maintaining a bidirectional link between the pressing sleeve 4 and the pump rod 3 during pressing and rising.

[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 restricting bidirectional movement of the pump rod 3 in the longitudinal direction.

[0038] 2 to 5, a restricting protrusion 41 is provided on the inner periphery of the pressing sleeve 4, and a restricting groove 35 is provided on the outer periphery of the pump rod 3. The restricting protrusion 41 and the restricting groove 35 and fit together, allowing the restricting protrusion 41 to fit into the restricting groove 35, resulting in a structure in which 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 a 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 when under 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 furthermore, tilting and swinging of the piston 2 is not caused, thereby maintaining smooth and stable movement of the piston 2.

[0039] This regulating groove 35 has a ring structure, and the regulating protrusion 41 has a ring structure that fits into the regulating groove 35, thereby forming a ring-shaped 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 toward 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. The third restricting surface 351 and the first restricting surface 411 face each other and can press against each other, thereby transmitting 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 pressure away from the piston 2. The transmission of pressure between the restricting surfaces realizes interlocking between the pressing sleeve 4 and the pump rod 3.

[0041] The regulating groove 35 further has a lower surface 353 facing the inner periphery, which has an annular structure, while the regulating protrusion 41 has an upper surface 413 facing the outer periphery, which 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 adaptive tilting and swinging between the regulating protrusion 41 and the regulating groove 35, and maintains the 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 has a flared shape that gradually widens toward the piston 2, and the third restriction surface 351 of the restriction groove 35 also has a flared shape that gradually widens toward the piston 2, so that the first restriction surface 411 and the third restriction surface 351 fit together and cover each other to form a tapered structure. On the one hand, the tapered structure can generate a certain centering effect 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 of the pressing sleeve 4 during pressing. On the other hand, the flared first restriction surface 411 can form a guide structure that can act as a guide for the pump rod 3 while it is being pressed against the pressing sleeve 4, improving the smoothness of engagement between them.

[0043] Furthermore, this pump rod 3 2nd end 302 Piston 2 move away from Aperture gradually narrows in the direction Part 37 The tapered throttle portion 37 can also function as an inclined guide structure. The tapered throttle portion 37 and the first restriction surface 411 fit together to further improve the smoothness of engagement between the pressing sleeve 4 and the pump body.

[0044] Furthermore, the restricting protrusion 41 is provided with a plurality of notches 42, which can divide the restricting protrusion 41 into a plurality of portions spaced apart in an annular shape. By protrusion is formed. protrusion is an arc-shaped structure, and a single protrusion is the overall circular regulation protrusion 4, which has a more flexible deformation range than the above, thereby improving the smoothness during mutual engagement between the regulating protrusion 41 and the regulating groove 35, and is advantageous for assembling the pressing sleeve 4 and the pump rod 3 together.

[0045] Furthermore, this pump rod 3 2nd end 302 The notch 36 may be opened at the position, and the notch 36 may be formed from the end face of the second end 302. RakuThe notch 36 extends to the position of the brake groove 35. The notch 36 can divide 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, which can improve the smoothness of engagement when the pump rod 3 is engaged 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 examples. Any technical solutions that fall within the concept of the present invention are also within the scope of protection of the present invention. In addition, any improvements or modifications made by those skilled in the art without departing from the principles of the present invention should also be considered 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. Regulator holder 32, tapered protrusion 33. Valve orifice 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, restriction 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. a pump housing (1), a piston (2), a pump rod (3), and a pressure sleeve (4); a pump pressure chamber (13) is provided in the pump housing (1); the piston (2) is provided in the pump pressure chamber (13) and contacts 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 the inner periphery of the pressure sleeve (4) and the outer periphery of the pump rod (3) to allow relative movement; the pressure sleeve (4) and the pump rod (3) are engaged with each other to achieve bidirectional movement of the pump rod (3) in the longitudinal direction; the pressure sleeve (4) generates a tilting swing when pressure is received; and the pressure sleeve (4) does not drive the pump rod (3) to tilt and swing. A restricting protrusion (41) is provided on the inner periphery of the pressing sleeve (4), and a restricting groove (35) is provided on the outer periphery of the pump rod (3). The restricting protrusion (41) is engaged with the restricting groove (35) and has a space (8) that allows movement in the longitudinal direction of the pump rod (3). The restriction groove (35) has an annular structure, and the restriction protrusion (41) has an annular structure that fits into the restriction groove (35), The restricting protrusion (41) has a first restricting surface (411) facing the piston (2), and the first restricting surface (411) has a flared shape that gradually widens toward the piston (2). The restricting groove (35) has a third restricting surface (351) facing the first restricting surface (411), and the third restricting surface (351) has a flared shape that gradually widens toward the piston (2) and is compatible with the first restricting surface (411). A pressure pump, characterized in that the first regulating surface (411) and the third regulating surface (351) fit together to form tapered structures that are provided over each other.

2. 2. The pressure pump according to claim 1, wherein the regulating protrusion (41) has the 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 the 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).

3. 2. The pressure pump according to claim 1, wherein the second end of the pump rod (3) is formed with a throttle portion (37) that gradually narrows in a direction away from the piston (2).

4. 2. The pressure pump according to claim 1, wherein the regulating protrusion (41) has a plurality of notches (42) formed therein, and the regulating protrusion (41) is formed by a plurality of protrusions distributed at intervals in an annular shape.

5. 2. The pressure pump according to claim 1, wherein a notch (36) is formed in the second end of the pump rod (3), and the notch (36) extends from the second end to the regulating groove (35).

6. The pressure pump according to claim 1, characterized in that the regulating groove (35) has a bottom surface (353) at the bottom, the regulating protrusion (41) has an upper surface (413) of the protrusion, the upper surface (413) and the bottom surface (353) face each other and form a gap (7).

7. The pump further includes a spring, a one-way valve (6), and a mounting sleeve (5), the spring elastically acting on the pressing sleeve (4) in a direction away from the piston (2), the pump housing (1) having a liquid supply port (11), the one-way valve (6) being provided in the liquid supply port (11) and used to conduct liquid in one direction toward the pump pressing chamber (13), the pump housing (1) having an attachment port (12), the mounting sleeve (5) having an annular structure and attached to the attachment port (12) and used to press and restrict the piston (2), the pressing sleeve (4) extending from the pump housing (1) by the inner periphery of the mounting sleeve (5), The piston (2) has an annular structure, its outer periphery contacting 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). A regulating holder (31) is fixedly connected to the first end of the pump rod (3). A tapered protrusion (32) is formed between the regulating holder (31) and the pump rod (3). The piston (2) is disposed at one end of the pressure sleeve (4) and slides integrally therewith. The sliding stroke of the piston (2) is 7. The pressure pump according to claim 1, wherein the stroke is regulated by the regulating holder (31) and the pressing sleeve (4), the pump rod (3) has a valve hole (33) formed therein that is open toward the first end, a through hole (34) that communicates with the valve hole (33) is formed in a position on the outer periphery of the first end of the pump rod (3) near the regulating holder (31), and the piston (2) abuts against the regulating holder (31) during a sliding stroke to close the through hole (34) and abuts against the pressing sleeve (4) to open the through hole (34).

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