Manual pump with unloading function
By adding a restraint structure and unloading valve to the manual pump, the problems of plunger disengagement and unloading are solved, and the convenient operation and effective unloading of the manual pump are achieved, ensuring the sealing and stability of the oil passage.
Patent Information
- Application Number
- CN202422499307.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-10-16
AI Technical Summary
During use, traditional manual pumps have problems with the piston disengage from the pump seat and lack an effective unloading structure.
A manual pump with unloading function is designed. By adding a restraint structure and unloading valve to the handle, the plunger is prevented from disengaging and the pressure unloading of the oil passage is realized, including a sealed partition plate and a snap structure to prevent the handle from shaking, and the unloading valve is used to control the oil passage communication and cut-off.
It realizes the convenient operation of the manual pump, prevents the plunger from breaking away, ensures the sealing in the oil passage, and can effectively unload, preventing air from entering the oil supply passage.
Smart Images
Figure CN223089460U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of manual pumps, and more specifically to a manual pump with a load-unloading function. Background technology:
[0002] The working principle of the hydraulic hand pump is to shake the handle up and down to make the plunger rise and fall continuously, and the sealed volume decreases and increases periodically, so the pump continuously absorbs and discharges oil. It has the advantages of small size, light weight, and easy to carry. When the traditional hand pump is not in use, its handle does not have a relevant restraining structure. During use, there is a problem that the plunger is separated from the pump seat; the current hand pump does not have a structure that facilitates effective unloading in the oil outlet channel after use, so it is necessary to design a hand pump that can restrain the handle and facilitate unloading after use. Utility model content:
[0003] The purpose of the utility model is to address the deficiencies of the prior art and to provide a manual pump with a unloading function. The manual pump is easy to operate, and a restraining structure is added to the handle to prevent the plunger from detaching while facilitating the retraction and positioning of the handle; and it is convenient to unload the pressure of the oil channel in the manual pump.
[0004] A manual pump with unloading function comprises an oil storage tank, one end of the oil storage tank is fixedly connected to a pump seat, a vertical oil supply hole connected to the oil storage tank is formed on the pump seat, and a plunger is inserted in the oil supply hole; an oil supply interface connected to the oil supply hole is formed on the pump seat on one side of the bottom of the oil supply hole, and a straight joint is screwed in the oil supply interface; a first unloading channel connected to the oil supply interface is formed vertically in the pump seat on the upper side of the oil supply interface, an unloading valve interface is formed at the upper end of the first unloading channel, and an unloading valve is screwed in the unloading valve interface, and a second unloading channel connected to the unloading valve interface and the oil storage tank is formed in the pump seat, and the unloading valve controls the connection and cutoff between the second unloading channel and the first unloading channel;
[0005] A handle with a "冂"-shaped cross section is provided above the oil storage tank, the front end of the handle is hinged to a connecting arm through a front pin shaft, and the lower end of the connecting arm is hinged to the pump seat through a bolt; the upper end of the plunger protrudes out of the pump seat to form a hinge head, and the hinge head is hinged to the handle through a rear pin shaft, and the handles on the front and rear sides of the rear pin shaft are formed with limit stops, and the outer wall of the hinge head is formed with a limit slot opposite to the limit stop block;
[0006] The other end of the oil storage tank is fixed with a box cover, an ear seat is formed on the outer wall of the upper part of the box cover, and a U-shaped buckle is formed on the ear seat; a cylindrical gripping handle is formed at the rear end of the handle, and the gripping handle is clamped in the buckle of the box cover;
[0007] A sealing partition plate is inserted in the oil storage tank, and the sealing partition plate includes a rear clamping plate and a front clamping plate, and the rear clamping plate and the front clamping plate are fixedly connected together by screws; a rubber sealing gasket is fixedly connected between the rear clamping plate and the front clamping plate, and the outer ring of the rubber sealing gasket is formed with an inclined sealing lip, which is pressed against the inner wall of the oil storage tank.
[0008] Preferably, a cylindrical boss is formed in the middle of the front chuck, and a screw passes through the rear chuck and is screwed into the boss of the front chuck; a chain is fixedly connected to the screw, and the end of the chain is fixedly connected to the box cover;
[0009] The outer ring of the front chuck is formed with an L-shaped rib, an annular sealing cavity is formed between the rib and the inner wall of the oil storage tank, and a sealing lip is inserted in the sealing cavity.
[0010] Preferably, a groove extending to the ear seat is formed on the lower end of the inner side wall of the buckle, and a limiting protrusion is formed on the inner side wall of the upper end of the buckle.
[0011] Preferably, the length of the handle is greater than the length of the oil tank, and a spherical anti-slip head is formed on the rear end of the gripping handle of the handle.
[0012] Preferably, a sealing boss in the shape of a circular ring and connected to the first unloading channel is formed on the bottom surface of the unloading valve interface on the pump seat;
[0013] The unloading valve comprises a T-shaped valve core, the head of which is pressed against a sealing boss; a spring and a positioning sleeve are inserted into the valve core, and the positioning sleeve is threadedly fixed in the unloading valve interface of the pump seat; one end of the spring is pressed against the head of the valve core, and the other end is pressed against the positioning sleeve; the end of the valve core extends out of the positioning sleeve and is hingedly connected to a connecting head through a hinge shaft, and an operating handle is threadedly connected to the connecting head.
[0014] Preferably, the connector comprises a rectangular rotating block, one end of which is formed with an arc-shaped guide surface, a slot penetrating the guide surface is formed in the rotating block, the end of the valve core is inserted into the slot of the rotating block, the hinge shaft is inserted at the end of the valve core, and both ends of the hinge shaft extend out of the valve core and are inserted and fixed on the rotating block;
[0015] The end face of the rotating block adjacent to the guide surface on the connecting head is pressed against the positioning sleeve, and the center distance from the positioning sleeve to the hinge shaft is smaller than the center distance from the guide surface on the connecting head to the hinge shaft.
[0016] The beneficial effects of the utility model are:
[0017] 1. This manual pump is easy to operate. A restraint structure is added to the handle to prevent the plunger from detaching and facilitate the retraction and positioning of the handle; it also facilitates the pressure unloading of the oil channel in the manual pump.
[0018] 2. The oil storage tank of the manual pump is provided with a well-sealed oil separator, which can ensure that the lubricating oil enters the oil supply channel evenly and stably, and prevent air from entering the oil supply channel. Description of the drawings:
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model from a side view;
[0021] Figure 3 for Figure 2 Schematic cross-sectional view at AA in the middle.
[0022] In the figure: 1. oil storage tank; 2. tank cover; 3. handle; 4. pump seat; 5. plunger; 6. straight-through joint; 7. unloading valve; 8. sealing partition plate; 9. rear pin shaft; 10. connecting arm; 11. bolt; 12. front pin shaft. Specific implementation method:
[0023] Example: See Figures 1 to 3 As shown, a manual pump with unloading function comprises an oil storage tank 1, one end of the oil storage tank 1 is fixedly connected to a pump seat 4, a vertical oil supply hole 41 connected to the oil storage tank 1 is formed on the pump seat 4, and a plunger 5 is inserted in the oil supply hole 41; an oil supply interface 42 connected to the oil supply hole 41 is formed on the pump seat 4 on one side of the bottom of the oil supply hole 41, and a straight-through connector 6 is screwed in the oil supply interface 42; a first unloading channel 43 connected to the oil supply interface 42 is formed vertically in the pump seat 4 on the upper side of the oil supply interface 42, an unloading valve interface is formed at the upper end of the first unloading channel 43, and an unloading valve 7 is screwed in the unloading valve interface, and a second unloading channel 44 connected to the unloading valve interface and the oil storage tank 1 is formed in the pump seat 4, and the unloading valve 7 controls the connection and cutoff between the second unloading channel 44 and the first unloading channel 43;
[0024] A handle 3 with a "冂"-shaped cross section is provided above the oil storage tank 1. The front end of the handle 3 is hinged to a connecting arm 10 through a front pin shaft 12. The lower end of the connecting arm 10 is hinged to the pump seat 4 through a bolt 11. The upper end of the plunger 5 extends out of the pump seat 4 to form a hinge head 51. The hinge head 51 is hinged to the handle 3 through a rear pin shaft 9. The handle 3 on the front and rear sides of the rear pin shaft 9 is formed with a limit stopper 33. The outer wall of the hinge head 51 is formed with a limit slot 52 opposite to the limit stopper 33.
[0025] The other end of the oil storage tank 1 is fixed with a box cover 2, and an ear seat 21 is formed on the outer wall of the upper part of the box cover 2, and a U-shaped buckle 22 is formed on the ear seat 21; the rear end of the handle 3 is formed with a cylindrical gripping handle 31, and the gripping handle 31 is clamped in the buckle 22 of the box cover 2;
[0026] A sealing partition disk 8 is inserted into the described fuel storage tank 1. The sealing partition disk 8 includes a rear clamping disk 81 and a front clamping disk 82, and the rear clamping disk 81 and the front clamping disk 82 are fixedly connected together by screws; a rubber sealing gasket 83 is fixedly connected between the rear clamping disk 81 and the front clamping disk 82. An inclined sealing lip 831 is formed on the outer ring of the rubber sealing gasket 83, and the sealing lip 831 is pressed against the inner wall of the fuel storage tank 1.
[0027] Preferably, a cylindrical boss is formed in the middle of the front clamping disk 82, and the screw passes through the rear clamping disk 81 and is screwed into the boss of the front clamping disk 82; a chain is fixedly connected to the screw, and the end of the chain is fixedly connected to the tank cover 2;
[0028] An L-shaped edge 821 is formed on the outer ring of the front clamping disk 82. An annular sealing cavity is formed between the edge 821 and the inner wall of the fuel storage tank 1, and the sealing lip 831 is inserted into the sealing cavity.
[0029] Preferably, a cut groove extending to the ear seat 21 is formed on the lower end of the inner side wall of the buckle 22, and a limiting convex block 23 is formed on the inner side wall of the upper end of the buckle 22.
[0030] Preferably, the length of the handle 3 is greater than the length of the fuel storage tank 1, and a spherical anti-slip head 32 is formed at the rear end of the holding handle 31 on the handle 3.
[0031] Preferably, a sealing boss 45 which is circular ring-shaped and communicates with the first unloading channel 43 is formed on the bottom surface of the unloading valve interface on the pump base 4;
[0032] The described unloading valve 7 includes a T-shaped valve core 71, and the head of the valve core 71 is pressed against the sealing boss 45; a spring 73 and a positioning sleeve 72 are inserted on the valve core 71, and the positioning sleeve 72 is screwed and fixed in the unloading valve interface of the pump base 4; one end of the spring 73 is pressed against the head of the valve core 71 and the other end is pressed against the positioning sleeve 72; the end of the valve core 71 extends out of the positioning sleeve 72 and is hinged with a connecting head 74 through a hinge shaft, and an operating handle 75 is screwed on the connecting head 74.
[0033] Preferably, the connecting head 74 includes a rectangular rotating block. An arc-shaped guiding surface is formed at one end of the rotating block. A slot penetrating the guiding surface is formed in the rotating block. The end of the valve core 71 is inserted into the slot of the rotating block, the hinge shaft is inserted into the end of the valve core 71, and both ends of the hinge shaft extend out of the valve core 71 and are inserted and fixed on the rotating block;
[0034] The end face of the rotating block adjacent to the guiding surface on the connecting head 74 is pressed against the positioning sleeve 72, and the center distance from the positioning sleeve 72 to the hinge shaft is less than the center distance from the guiding surface on the connecting head 74 to the hinge shaft.
[0035] Working principle: This structure is a manual pump with a load unloading function, and the manual pump has the following structural technical points:
[0036] 1. A sealed partition plate 8 composed of a rear chuck 81, a front chuck 82 and a rubber gasket 83 is arranged in the oil storage tank 1. As the lubricating oil in the oil storage tank 1 is output and consumed, the sealed partition plate 8 will divide the oil storage tank 1 into two chambers, one is an empty chamber and the other is an oil storage chamber, which can prevent the air in the empty chamber from entering the oil storage chamber, thereby avoiding the presence of air in the output lubricating oil.
[0037] 2. A Y-shaped pipe clamp composed of an ear seat 21 and a buckle 22 is provided on the cover 2 of the oil storage tank 1, and its handle 3 can be clamped in the buckle 22 to prevent the handle 3 from detaching, so that the handle 3 will not shake randomly after the manual pump is folded, avoiding oil leakage from the oil supply channel;
[0038] 3. A limit stop block 33 is provided on the handle 3. When the handle 3 rotates upward and the plunger 5 moves upward, the lower end of the limit stop block 33 will enter the limit card slot 52 on the plunger 5 to limit the upward movement of the plunger 5, thereby preventing the plunger 5 from detaching;
[0039] 4. Another technical point is the unloading valve 7. The unloading valve 7 can realize the movement of the valve core 71 by rotating the connecting head 74, realizing the connection and disconnection between the second unloading channel 44 and the first unloading channel 43; when the second unloading channel 44 and the first unloading channel 43 are connected, the oil pressure of the oil supply hole 41 is unloaded to the oil storage tank 1 through the first unloading channel 43 and the second unloading channel 44, realizing the zeroing of the oil pressure of the oil supply hole 41.
[0040] The described embodiments are used to illustrate the present invention by way of example, rather than to limit the present invention. Any person skilled in the art can modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the rights protection of the present invention shall be as listed in the claims of the present invention.
Claims
1. A manual pump with a load unloading function, comprising an oil storage tank (1), one end of the oil storage tank (1) is fixedly connected with a pump base (4), a vertical oil supply hole (41) communicating with the oil storage tank (1) is formed on the pump base (4), and a plunger (5) is inserted into the oil supply hole (41); an oil supply interface (42) communicating with the oil supply hole (41) is formed on the pump base (4) on one side of the bottom of the oil supply hole (41), and a straight-through joint (6) is screwed into the oil supply interface (42); characterized in that: A first unloading channel (43) is formed in the pump seat (4) on the upper side of the oil supply interface (42) and is vertically connected to the oil supply interface (42). An unloading valve interface is formed at the upper end of the first unloading channel (43). An unloading valve (7) is threadedly connected to the unloading valve interface. A second unloading channel (44) is formed in the pump seat (4) and is connected to the unloading valve interface and the oil storage tank (1). The unloading valve (7) controls the connection and disconnection between the second unloading channel (44) and the first unloading channel (43). A handle (3) having a "冂"-shaped cross section is provided above the oil storage tank (1); the front end of the handle (3) is hingedly connected to a connecting arm (10) via a front pin shaft (12); the lower end of the connecting arm (10) is hingedly connected to the pump seat (4) via a bolt (11); the upper end of the plunger (5) protrudes out of the pump seat (4) to form a hinged head (51); the hinged head (51) is hingedly connected to the handle (3) via a rear pin shaft (9); the handle (3) is formed with limit blocks (33) on the front and rear sides of the rear pin shaft (9); and a limit slot (52) is formed on the outer wall of the hinged head (51) and is opposite to the limit block (33); The other end of the oil storage tank (1) is sleeved and fixed with a tank cover (2), an ear seat (21) is formed on the outer wall of the upper part of the tank cover (2), and a U-shaped buckle (22) is formed on the ear seat (21); a cylindrical gripping handle (31) is formed at the rear end of the handle (3), and the gripping handle (31) is clamped in the buckle (22) of the tank cover (2); A sealing partition plate (8) is inserted into the oil storage tank (1), and the sealing partition plate (8) includes a rear clamping plate (81) and a front clamping plate (82), and the rear clamping plate (81) and the front clamping plate (82) are fixedly connected together by screws; a rubber sealing gasket (83) is fixedly connected between the rear clamping plate (81) and the front clamping plate (82), and the outer ring of the rubber sealing gasket (83) is formed with an inclined sealing lip (831), and the sealing lip (831) is pressed against the inner wall of the oil storage tank (1).
2. A manual pump with a load unloading function according to claim 1, characterized in that: A cylindrical boss is formed in the middle of the front chuck (82), and a screw passes through the rear chuck (81) and is screwed into the boss of the front chuck (82); a chain is fixedly connected to the screw, and the end of the chain is fixedly connected to the box cover (2); The outer ring of the front chuck (82) is formed with an L-shaped rib (821), an annular sealing cavity is formed between the rib (821) and the inner wall of the oil storage tank (1), and a sealing lip (831) is inserted in the sealing cavity.
3. A manual pump with a load unloading function according to claim 1, characterized in that: A groove extending to the ear seat (21) is formed on the lower end of the inner side wall of the buckle (22), and a limiting protrusion (23) is formed on the inner side wall of the upper end of the buckle (22).
4. A manual pump with a load unloading function according to claim 1, characterized in that: The length of the handle (3) is greater than the length of the oil storage tank (1), and a spherical anti-slip head (32) is formed at the rear end of the gripping handle (31) on the handle (3).
5. A manual pump with a unloading function according to claim 1, characterized in that: The bottom surface of the unloading valve interface on the pump seat (4) is formed with a sealing boss (45) in the shape of a circular ring and connected to the first unloading channel (43); The unloading valve (7) described above includes a T-shaped valve core (71), and the head of the valve core (71) is pressed against the sealing boss (45); a spring (73) and a positioning sleeve (72) are sleeved on the valve core (71), and the positioning sleeve (72) is screwed and fixed in the unloading valve interface of the pump base (4); one end of the spring (73) is pressed against the head of the valve core (71), and the other end is pressed against the positioning sleeve (72); the end of the valve core (71) extends out of the positioning sleeve (72) and is hinged with a connecting head (74) through a hinge shaft, and an operating handle (75) is screwed on the connecting head (74).
6. A manual pump with a load unloading function according to claim 5, characterized in that: The connecting head (74) described above includes a rectangular rotating block, one end of the rotating block is formed with an arc-shaped guiding surface, and a slot penetrating the guiding surface is formed in the rotating block; the end of the valve core (71) is inserted into the slot of the rotating block, the hinge shaft is inserted into the end of the valve core (71), and both ends of the hinge shaft extend out of the valve core (71) and are inserted and fixed on the rotating block; The end face of the rotating block adjacent to the guiding surface on the connecting head (74) is pressed against the positioning sleeve (72), and the center distance from the positioning sleeve (72) to the hinge shaft is less than the center distance from the guiding surface on the connecting head (74) to the hinge shaft.