Manual grease pump

Abstract

The utility model discloses a manual grease pump, and belongs to the field of lubricating devices. The device comprises an oil tank, a plunger assembly and a pressure relief handle, the plunger assembly comprises a plunger rod and a plunger sleeve. An oil inlet cavity and an oil outlet cavity which are connected with each other are formed in the plunger sleeve; the oil inlet cavity is communicated with an inner cavity of the oil tank, and the oil outlet cavity is communicated with the oil outlet. The plunger rod extends into the oil inlet cavity; the oil outlet cavity is communicated with an inner cavity of the oil tank through a flow channel; a pressure relief valve rod is mounted on the flow channel; and the pressure relief handle is connected with the pressure relief valve rod. The manual grease pump is simple in structure, manual in operation and reliable in pressure relief.

Description

Technical Field

[0001] This utility model relates to the field of lubrication devices, especially centralized lubrication systems, and specifically to a manual grease pump. Background Technology

[0002] Currently, manual grease pumps on the market use steel balls for orifice sealing, which is a hard seal structure. This results in large leakage, insufficient pressure, and the inability of the metering distributor to produce oil. Consequently, the lubrication points do not receive enough oil for lubrication, which exacerbates wear on the friction pairs, causing equipment failure and downtime for after-sales maintenance. Utility Model Content

[0003] The purpose of this invention is to provide a highly efficient manual grease pump.

[0004] To solve the above-mentioned technical problems, this utility model provides a manual grease pump, including an oil tank, a plunger assembly, and a pressure relief handle;

[0005] The plunger assembly includes a plunger rod and a plunger sleeve;

[0006] The plunger sleeve has a connected oil inlet chamber and an oil outlet chamber.

[0007] The oil inlet chamber is connected to the inner cavity of the oil tank, and the oil outlet chamber is connected to the oil outlet.

[0008] The plunger rod extends into the oil inlet chamber;

[0009] The oil outlet chamber is connected to the inner cavity of the oil tank through a flow channel;

[0010] A pressure relief valve stem is installed on the flow channel;

[0011] The pressure relief handle is connected to the pressure relief valve stem.

[0012] Preferably, it also includes a base;

[0013] The fuel tank is mounted on top of the base;

[0014] The plunger sleeve is installed inside the base;

[0015] The base is equipped with a filler nozzle that connects to the inner cavity of the fuel tank.

[0016] Preferably, it also includes a handle;

[0017] One end of the handle is hinged to the base via a connecting piece;

[0018] The handle sidewall is hinged to the plunger rod.

[0019] Preferably, the flow channel includes a horizontally arranged first flow channel and a vertically arranged second flow channel;

[0020] The first flow channel is connected to the oil outlet chamber, and the second flow channel is connected to the inner cavity of the oil tank.

[0021] The pressure relief valve stem is installed at the connection between the first flow channel and the second flow channel;

[0022] The pressure relief valve stem is provided with an L-shaped liquid flow channel for connecting the first flow channel and the second flow channel.

[0023] Preferably, the pressure relief valve stem is connected to the limit pin;

[0024] The base has two limiting posts around the push handle that are compatible with the limiting pins.

[0025] Preferably, the pressure relief handle and the limiting pin are respectively located on the front and rear sides of the pressure relief valve stem.

[0026] Preferably, a one-way valve is installed between the oil inlet chamber and the oil outlet chamber of the plunger sleeve.

[0027] Preferably, the top of the fuel tank is equipped with a removable fuel tank cover.

[0028] Preferably, an oil pressure plate is installed in the oil tank;

[0029] The pressure plate is slidably and sealed to the inner wall of the oil tank.

[0030] The bottom of the oil tank cover is connected to the top of the oil pressure plate via an oil pressure plate spring.

[0031] Preferably, a rubber sealing ring is provided on the contact surface between the oil pressure plate and the inner wall of the oil tank.

[0032] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0033] This utility model of a manual grease pump has a simple structure, is manually operated, and has reliable pressure relief. Attached Figure Description

[0034] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of a manual grease pump according to this utility model;

[0036] Figure 2 This is a structural diagram of the front of a manual grease pump;

[0037] Figure 3 This is a schematic diagram of the reverse side of a manual grease pump;

[0038] Figure 4 This is a schematic diagram of the structure when the flow channels are not connected;

[0039] Figure 5 This is a schematic diagram of the structure when the flow channels are connected;

[0040] In the picture:

[0041] 1. Handle; 2. Oil tank cap; 3. Oil tank; 4. Pressure plate spring; 5. Pressure plate; 6. Plunger rod; 7. Connecting piece; 8. Check valve; 9. Pressure relief handle; 9-1. Limit pin; 9-2. Limit pin; 10. Oil filler nozzle; 11. Oil outlet; 12. Plunger sleeve; 13. Oil inlet chamber; 14. Oil outlet chamber; 15. Flow channel; 151. First flow channel; 152. Second flow channel; 16. Pressure relief valve rod; 17. Base. Detailed Implementation

[0042] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0043] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this specification. The singular forms “a,” “described,” and “the” as used in one or more embodiments of this specification and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0044] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this specification, and similarly, second may also be referred to as first. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] This utility model provides a manual grease pump, including an oil tank 3, a plunger assembly and a pressure relief handle 9;

[0047] The plunger assembly includes a plunger rod 6 and a plunger sleeve 12;

[0048] The plunger sleeve 12 has an inlet chamber 13 and an outlet chamber 14 connected to each other.

[0049] The oil inlet chamber 13 is connected to the inner cavity of the oil tank 3, and the oil outlet chamber 14 is connected to the oil outlet 11;

[0050] The plunger rod 6 extends into the oil inlet chamber 13;

[0051] The oil outlet chamber 14 is connected to the inner cavity of the oil tank 3 through the flow channel 15;

[0052] A pressure relief valve stem 16 is installed on the flow channel 15;

[0053] The pressure relief handle 9 is connected to the pressure relief valve stem 16.

[0054] Preferably, it also includes a base 17;

[0055] The oil tank 3 is installed on top of the base 17;

[0056] The plunger sleeve 12 is installed inside the base 17;

[0057] The base 17 is provided with a filler nozzle 10 that communicates with the inner cavity of the oil tank 3.

[0058] Preferably, it also includes a handle 1;

[0059] One end of the handle 1 is hinged to the base 17 via a connecting piece 7;

[0060] The side wall of the handle 1 is hinged to the plunger rod 6.

[0061] Preferably, the flow channel 15 includes a horizontally arranged first flow channel 151 and a vertically arranged second flow channel 152;

[0062] The first flow channel 151 is connected to the oil outlet cavity 14, and the second flow channel 152 is connected to the inner cavity of the oil tank 3;

[0063] The pressure relief valve stem 16 is installed at the connection between the first flow channel 151 and the second flow channel 152;

[0064] The pressure relief valve stem 16 is provided with an L-shaped liquid flow channel for connecting the first flow channel 151 and the second flow channel 152.

[0065] Preferably, the pressure relief valve stem 16 is connected to the limit pin 9-2;

[0066] The base 17 has two limiting posts 9-1 that are adapted to the limiting pins 9-2 installed around the push handle 1.

[0067] Preferably, the pressure relief handle 9 and the limiting pin 9-2 are respectively disposed on the front and rear sides of the pressure relief valve stem 16.

[0068] Preferably, a one-way valve 8 is installed between the oil inlet chamber 13 and the oil outlet chamber 14 of the plunger sleeve 12.

[0069] Preferably, a removable fuel tank cover 2 is installed on the top of the fuel tank 3.

[0070] Preferably, an oil pressure plate 5 is installed in the oil tank 3;

[0071] The pressure plate 5 is slidably and sealed to the inner wall of the oil tank 3;

[0072] The bottom of the oil tank cover 2 is connected to the top of the oil pressure plate 5 via the oil pressure plate spring 4.

[0073] Preferably, a rubber sealing ring is provided on the contact surface between the oil pressure plate 5 and the inner wall of the oil tank 3.

[0074] To better illustrate the technical effects of this utility model, the present utility model provides the following specific embodiments to explain the above technical process:

[0075] Example 1: A manual grease pump, comprising a handle 1, a tank cap 2, a tank 3, a pressure plate spring 4, a pressure plate 5, a plunger rod 6, a connecting piece 7, a one-way valve 8, a grease nipple 10, an oil outlet 11, and a pressure relief handle 9.

[0076] Oil is added to the oil tank 3 through the filler nozzle 10. Pushing the handle 1 back and forth drives the plunger rod 6 to move back and forth, changing the volume of the cavity. Pushing open the one-way valve 8 allows oil to be discharged, and then it flows out to the oil outlet 11. This grease pump is mainly connected to a quantitative oil distributor. When it is difficult to push the handle 1, the pressure relief handle 9 is rotated upwards by 90 degrees to complete the system pressure relief. After the pressure relief is completed, the handle 1 is reset to prepare for the next pressure relief. This pump has a simple structure, is manually operated, and has reliable pressure relief.

[0077] This embodiment is accomplished through the following scheme. Pushing the handle 1 back and forth drives the plunger rod 6 to move back and forth, thereby changing the volume of the cavity. Pushing open the one-way valve 8 allows oil to be discharged, and then the oil flows to the outlet 11. When pushing the handle 1, a large resistance is felt, indicating that the metering dispenser in the system has completed its operation. At this time, the pump needs to depressurize. When the pressure relief handle 9 is moved upward, the high-pressure oil is connected to the oil tank 3 through the flow channel 15, releasing the high-pressure oil in the pipeline. When the pressure relief handle 9 is not moved, the flow channel between the high-pressure oil and the oil tank 3 is not connected. The reverse side is provided with a limit pin 9-2 and two limit posts 9-1. When the pressure relief handle 9 is rotated from bottom to top, it ensures a 90-degree rotation for effective pressure relief.

[0078] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A manual grease pump, characterized in that: Includes an oil tank (3), a plunger assembly, and a pressure relief handle (9); The plunger assembly includes a plunger rod (6) and a plunger sleeve (12); The plunger sleeve (12) has an inlet chamber (13) and an outlet chamber (14) connected to each other; The oil inlet chamber (13) is connected to the inner cavity of the oil tank (3), and the oil outlet chamber (14) is connected to the oil outlet (11); The plunger rod (6) extends into the oil inlet chamber (13); The oil outlet chamber (14) is connected to the inner cavity of the oil tank (3) through the flow channel (15); A pressure relief valve stem (16) is installed on the flow channel (15); The pressure relief handle (9) is connected to the pressure relief valve stem (16).

2. The manual grease pump according to claim 1, characterized in that, It also includes a base (17); The oil tank (3) is mounted on top of the base (17); The plunger sleeve (12) is installed inside the base (17); The base (17) is provided with a filler nozzle (10) that communicates with the inner cavity of the oil tank (3).

3. The manual grease pump according to claim 2, characterized in that, It also includes a handle (1); One end of the handle (1) is hinged to the base (17) via a connecting piece (7); The side wall of the handle (1) is hinged to the plunger rod (6).

4. The manual grease pump according to claim 3, characterized in that: The flow channel (15) includes a horizontally arranged first flow channel (151) and a vertically arranged second flow channel (152); The first flow channel (151) is connected to the oil outlet cavity (14), and the second flow channel (152) is connected to the inner cavity of the oil tank (3); The pressure relief valve stem (16) is installed at the connection between the first flow channel (151) and the second flow channel (152); The pressure relief valve stem (16) is provided with an L-shaped liquid flow channel for connecting the first flow channel (151) and the second flow channel (152).

5. The manual grease pump according to claim 4, characterized in that: The pressure relief valve stem (16) is connected to the limit pin (9-2); The base (17) has two limiting posts (9-1) around the push handle (1) that are adapted to the limiting pins (9-2).

6. The manual grease pump according to claim 5, characterized in that: The pressure relief handle (9) and the limit pin (9-2) are respectively located on the front and rear sides of the pressure relief valve stem (16).

7. The manual grease pump according to claim 6, characterized in that: The plunger sleeve (12) has a check valve (8) installed between the oil inlet chamber (13) and the oil outlet chamber (14).

8. The manual grease pump according to claim 7, characterized in that: The top of the fuel tank (3) is fitted with a removable fuel tank cover (2).

9. The manual grease pump according to claim 8, characterized in that: The oil tank (3) is equipped with an oil pressure plate (5); The pressure plate (5) is slidably connected to the inner wall of the oil tank (3); The bottom of the oil tank cover (2) is connected to the top of the oil pressure plate (5) via the oil pressure plate spring (4).

10. The manual grease pump according to claim 9, characterized in that: A rubber sealing ring is provided on the contact surface between the oil pressure plate (5) and the inner wall of the oil tank (3).

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