Electric butter machine

Abstract

The utility model belongs to the technical field of mechanical tools, and particularly relates to an electric grease machine which comprises a machine body and an oil tank arranged above the machine body, an oil discharging hole is formed below the oil tank, an oil conveying device is arranged in the machine body and comprises a pump body and a driving motor driving the pump body to work, and an oil inlet hole and an oil outlet hole are formed in the pump body. The oil inlet is communicated with the lower oil hole, an oil conveying channel is formed between the oil inlet and the oil outlet, the driving motor works to output oil in the oil tank from the oil outlet through the pump body, an overload channel communicated with the oil conveying channel is further formed in the pump body, a movable rod attached to the inner wall of the overload channel is arranged in the overload channel, and the inner end of the movable rod is located in the overload channel. An overload spring is arranged at the outer end of the overload channel, a microswitch is arranged outside the overload channel, a pressing part is arranged on the microswitch, and the pressing part is located on the outward moving path of the movable rod. The electric grease machine is simple in structure, has overload protection, and is better in effect and high in sealing performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical tools, in particular to an electric grease dispenser. Background Art

[0002] A grease dispenser, also known as an oiler or filler, is a machine used to increase the pressure of grease to lubricate the machine. It is widely used in industries such as machine tools, excavators, automobiles, and ships. Existing electric grease dispensers generally pump oil through a pump body to increase pressure, thereby discharging the grease in the grease dispenser from the oil outlet. However, since electric grease dispensers cannot accurately determine the amount of oil being refueled and whether it is full during refueling, they may continue to operate even when the grease is full and no more oil can be pumped in. This will cause a sudden increase in pressure in the grease dispenser, thereby damaging the grease dispenser or the machine being refueled, resulting in significant property losses. Therefore, an electric grease dispenser with overload protection is needed.

[0003] Currently, there is an electric grease dispenser with overload protection on the market. The overload protection structure is to set a steel ball in the oil delivery channel, and an overload spring is set behind the steel ball. When the pressure increases, the steel ball is pushed to move and contact the switch to complete the motor shutdown. However, the overload protection in the shape of a steel ball has poor sealing performance, because the steel ball needs to continuously contact the butter, and there will be some impurities and small particles in the butter. The contact surface between the steel ball and the oil delivery channel is only one circle. When impurities or small particles are stuck on the steel ball, the steel ball and the oil delivery channel will not be sealed, causing continuous oil leakage. Therefore, there is a need for an electric grease dispenser with overload protection, better effect and strong sealing. Summary of the Invention

[0004] The purpose of the utility model is to provide an electric grease dispenser with simple structure, overload protection, better effect and strong sealing performance.

[0005] The purpose of this utility model is achieved in this way:

[0006] An electric grease dispenser comprises a body and an oil tank arranged above the body, a lower oil hole is provided below the oil tank, an oil delivery device is provided in the body, the oil delivery device comprises a pump body and a driving motor that drives the pump body to work, an oil inlet hole and an oil outlet hole are provided on the pump body, the oil inlet hole is connected to the lower oil hole, an oil delivery channel is provided between the oil inlet hole and the oil outlet hole, the driving motor can output the oil in the oil tank from the oil outlet hole through the pump body when working, an overload channel is also provided in the pump body that is connected to the oil delivery channel, and a A movable rod is fitted into the inner wall of the movable rod, the inner end of the movable rod is located in the overload channel, and the outer end of the movable rod is provided with an overload spring. A micro switch is provided outside the overload channel, and a pressing part is provided on the micro switch. The pressing part is located on the path of the movable rod moving outward. When the pressure in the oil delivery channel and the overload channel is greater than the elastic force of the overload spring, the oil in the oil delivery channel and the overload channel overcomes the resistance of the overload spring and pushes the movable rod to move outward until the movable rod contacts and presses down the pressing part, thereby controlling the drive motor to turn off and stop working.

[0007] Furthermore, the movable rod includes a cylindrical plug, which is in contact with the inner wall of the overload channel. A lever is protruding from the side of the plug. The overload channel is provided with a movable hole at the position of the lever. The lever extends through the movable hole to the outside of the overload channel and is located above the pressing part. The lever can move up and down in the movable hole and limit the maximum movement of the lever.

[0008] Furthermore, an abutment portion is installed at the outlet of the overload channel, the abutment portion is located at the rear end of the plug, and both ends of the overload spring abut against the plug and the abutment portion respectively.

[0009] Furthermore, a thread groove is provided at the outlet of the overload channel, a threaded portion adapted to the thread groove is formed on the outer side of the abutting portion, and the abutting portion is installed into the overload channel through the threaded portion.

[0010] Furthermore, the length of the thread groove is greater than the length of the threaded portion, and the abutting portion can be rotated to move within the range of the thread groove, thereby adjusting the compression degree of the overload spring.

[0011] Furthermore, the movable rod also includes an extension rod formed at the rear end of the plug, and a guide hole adapted to the cross-sectional shape of the extension rod is opened in the middle of the abutment portion, and the extension rod passes through the guide hole.

[0012] Furthermore, the pump body is a plunger pump, and at least one plunger is provided in the pump body, one end of the plunger is provided in the oil delivery channel, and the driving motor is directly or indirectly connected to the plunger and can drive the plunger to move back and forth, thereby pushing the oil in the oil delivery channel to the oil outlet, and a plurality of oil outlet one-way valves are also provided in the oil delivery channel.

[0013] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0014] The utility model is an electric grease dispenser for filling grease and lubricating oil into equipment and machines. The main structure of the electric grease dispenser comprises a machine body and an oil tank mounted on the machine body. The oil tank is filled with grease to be filled. An oil delivery device is provided in the machine body for pressurizing and delivering the grease in the oil tank out from an oil outlet. The oil delivery device is a conventional motor and pump body. The pump body can adopt a plunger pump or other pump for delivering fluid. The basic structure of the pump has an oil inlet hole for oil inlet and an oil outlet hole for oil outlet, and an oil delivery channel connecting the two is provided inside. The oil inlet hole is connected with the oil tank. The butter in the oil tank can flow into the oil inlet hole by its own gravity or additional pressure. The driving motor can deliver the butter in the oil delivery channel from the oil outlet hole. The utility model is also additionally provided with an overload channel connected to the oil delivery channel in the pump body. The pressure in the oil delivery channel and the overload channel is the same. When the pressure in the oil delivery channel increases, the pressure in the overload channel also increases accordingly. A movable rod is provided in the overload channel. The outer wall of the movable rod fits with the inner part of the overload passage, which solves the problem of the previous steel ball top hole or cone top The disadvantage of the hole is that the side contact area is increased and the sealing performance is greatly improved. The butter will not flow between the outer wall of the movable rod and the inner wall of the overload channel, avoiding impurities or particles in the butter from getting stuck in the movable rod. When the pressure in the overload channel increases and overcomes the elastic force of the overload spring, the butter will push the movable rod to move. Since a micro switch for controlling the drive motor switch is set on the moving path of the movable rod, the movable rod will turn off the drive motor after moving to a certain distance, avoiding pressure increase and damaging the grease machine or the machine being refueled. The movable rod has a long moving stroke and is not prone to the previous phenomenon of false shutdown caused by the movement of steel balls or cones due to instantaneous resistance; the structure is more stable, has good sealing performance, is not prone to oil leakage problems, and automatically stops when the pressure increases to prevent overload, effectively improving the user experience of the grease machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the present utility model.

[0016] Figure 2 It is a cross-sectional view of the present utility model.

[0017] Figure 3 It is a schematic diagram of the connection between the pump body and the oil tank of the utility model.

[0018] Figure 4 It is a schematic diagram of the connection between the pump body and the drive motor of the utility model.

[0019] Figure 5 It is an internal schematic diagram of the pump body of the utility model when it is connected to the drive motor.

[0020] Figure 6 This is a working state diagram of the plunger and the oil outlet one-way valve of the utility model.

[0021] Figure 7 It is a cross-sectional view of the movable rod of the utility model inside the pump body.

[0022] Figure 8 It is a schematic diagram of the positions of the pump body and the micro switch of the utility model.

[0023] Figure 9 It is a three-dimensional diagram of the pump body of the utility model.

[0024] Figure 10 It is a cross-sectional view of the overload channel in the pump body of the utility model.

[0025] Figure 11 It is a cross-sectional view of the oil delivery channel in the pump body of the utility model.

[0026] Figure 12 It is a cross-sectional view of the oil outlet one-way valve of the utility model when it is working.

[0027] Figure 13 It is a cross-sectional view of the oil outlet one-way valve of the utility model when it is not working.

[0028] Figure 14 This is an isolated view of the movable rod and the abutting portion of the utility model.

[0029] The meaning of the numbers in the figure:

[0030] 1-machine body; 2-oil tank; 3-lower oil hole; 4-oil delivery device; 5-pump body; 6-drive motor;

[0031] 7-Oil inlet hole; 8-Oil outlet hole; 9-Oil delivery channel; 10-Overload channel; 11-Movable rod; 12-Overload spring; 13-Micro switch; 14-Pressing part; 15-Plug; 16-Driving rod; 17-Moving hole; 18-Abutment part; 19-Threaded groove; 20-Threaded part; 21-Extension rod; 22-Guide hole; 23-Plunger; 24-Oil outlet one-way valve. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with specific embodiments:

[0033] An electric grease dispenser includes a body 1 and an oil tank 2 arranged above the body 1. A lower oil hole 3 is opened below the oil tank 2. An oil delivery device 4 is provided in the body 1. The oil delivery device 4 includes a pump body 5 and a drive motor 6 that drives the pump body 5 to work. The pump body 5 is provided with an oil inlet hole 7 and an oil outlet hole 8. The oil inlet hole 7 is connected to the lower oil hole 3. An oil delivery channel 9 is opened between the oil inlet hole 7 and the oil outlet hole 8. When the drive motor 6 works, the oil in the oil tank 2 can be output from the oil outlet hole 8 through the pump body 5. An overload channel 10 connected to the oil delivery channel 9 is also opened in the pump body 5. The overload channel 10 is provided with a The movable rod 11 is fitted together, and the inner end of the movable rod 11 is located in the overload channel 10, and the outer end is provided with an overload spring 12. A micro switch 13 is provided outside the overload channel 10, and a pressing part 14 is provided on the micro switch 13. The pressing part 14 is located on the path of the movable rod 11 moving outward. When the pressure in the oil delivery channel 9 and the overload channel 10 is greater than the elastic force of the overload spring 12, the oil in the oil delivery channel 9 and the overload channel 10 overcomes the resistance of the overload spring 12 and pushes the movable rod 11 to move outward until the movable rod 11 contacts and presses down the pressing part 14, thereby controlling the drive motor 6 to turn off and stop working.

[0034] The utility model is an electric grease dispenser for filling grease or lubricating oil into equipment and machines. The main structure of the electric grease dispenser comprises a machine body 1 and an oil tank 2 mounted on the machine body 1. The oil tank 2 is filled with grease to be filled. The machine body 1 is provided with an oil delivery device 4 for pressurizing and delivering the grease in the oil tank 2 from an oil outlet. The oil delivery device 4 is a conventional motor and pump body 5. The pump body 5 can adopt a plunger 23 pump or other pump for conveying fluid. The basic structure of the pump has an oil inlet hole 7 for oil inlet and an oil outlet hole 8 for oil outlet, and an oil delivery channel 9 connecting the two is provided inside. The oil inlet hole 7 is connected to the oil tank 2. The butter in the oil tank 2 can flow into the oil inlet hole 7 by its own gravity or additional pressure. The driving motor 6 can deliver the butter in the oil delivery channel 9 from the oil outlet hole 8; the utility model is also additionally provided with an overload channel 10 connected to the oil delivery channel 9 in the pump body 5. The pressure in the oil delivery channel 9 is the same as that in the overload channel 10. When the pressure in the oil delivery channel 9 increases, the pressure in the overload channel 10 also increases. A movable rod 11 is provided in the overload channel 10. The outer wall of the movable rod 11 fits with the inner part of the overload passage, which solves the problem of the previous steel ball top hole. Or the shortcomings of the cone top hole, the side contact surface is increased, and the sealing performance is also greatly improved. The butter will not flow between the outer wall of the movable rod 11 and the inner wall of the overload channel 10, avoiding impurities or particles in the butter from getting stuck in the movable rod 11. When the pressure in the overload channel 10 increases and overcomes the elastic force of the overload spring 12, the butter will push the movable rod 11 to move. Since a micro switch 13 for controlling the switch of the drive motor 6 is set on the moving path of the movable rod 11, the movable rod 11 will turn off the drive motor 6 after moving to a certain distance, avoiding the increase in pressure to damage the butter machine or the machine being refueled. The moving stroke of the movable rod 11 is long, and it is not easy to cause the wrong shutdown caused by the movement of the steel ball or cone due to instantaneous resistance. The structure is more stable, has good sealing performance, is not prone to oil leakage problems, and automatically shuts down when the pressure increases to prevent overload, effectively improving the user experience of the butter machine.

[0035] In a preferred embodiment of the present invention, the movable rod 11 includes a cylindrical plug 15 that fits against the inner wall of the overload channel 10. A lever 16 protrudes from the side of the plug 15. The overload channel 10 defines a movable hole 17 at the location of the lever 16. The lever 16 extends through the movable hole 17 to the outside of the overload channel 10 and is located above the pressing portion 14. The lever 16 can move up and down within the movable hole 17, limiting the maximum movement of the lever 16. The cylindrical plug 15 provides a larger contact surface with the overload channel 10, making it difficult for grease to flow out of the sidewall of the plug 15. Therefore, impurities and particles in the grease will not be stuck on the sidewall of the plug 15, thereby improving the sealing performance. The protruding lever 16 also serves as a limiter, and the lever 16 does not apply significant pressure to the micro switch 13.

[0036] In a preferred embodiment of the present invention, an abutment portion 18 is installed at the outlet of the overload channel 10. The abutment portion 18 is located at the rear end of the plug 15, and the two ends of the overload spring 12 respectively abut against the plug 15 and the abutment portion 18. A threaded groove 19 is provided at the outlet of the overload channel 10, and a threaded portion 20 adapted to the threaded groove 19 is formed on the outer side of the abutment portion 18. The abutment portion 18 is installed into the overload channel 10 via the threaded portion 20. The length of the threaded groove 19 is greater than the length of the threaded portion 20. Rotating the abutment portion 18 allows it to move within the range of the threaded groove 19, thereby adjusting the compression degree of the overload spring 12, thereby making the overload value adjustable. The abutment portion 18 moves inward, thereby compressing the overload spring 12. After the overload spring 12 is compressed, greater pressure is required to overcome the resistance of the overload spring 12, and vice versa.

[0037] In a preferred embodiment of the present invention, the movable rod 11 further includes an extension rod 21 formed at the rear end of the plug 15. A guide hole 22 is defined in the middle of the abutment portion 18, which matches the cross-sectional shape of the extension rod 21. The extension rod 21 passes through the guide hole 22. The guide hole 22 guides the movable rod 11, preventing it from shifting during movement. Furthermore, during maintenance, the movable rod 11 can be manually pushed directly from the outside. If the overload spring 12 becomes stuck and cannot be reset normally, it can be manually pushed to reset it.

[0038] In a preferred embodiment of the present invention, the pump body 5 is a plunger pump, and at least one plunger 23 is provided in the pump body 5. One end of the plunger 23 is provided in the oil delivery channel 9. The driving motor 6 is directly or indirectly connected to the plunger 23 and can drive the plunger 23 to move back and forth, thereby pushing the oil in the oil delivery channel 9 to the oil outlet. A plurality of oil outlet one-way valves 24 are also provided in the oil delivery channel 9.

[0039] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric grease dispenser, comprising a body (1) and an oil tank (2) disposed above the body (1), wherein an oil lower hole (3) is provided below the oil tank (2), and characterized in that: An oil delivery device (4) is provided in the machine body (1), and the oil delivery device (4) includes a pump body (5) and a driving motor (6) for driving the pump body (5) to work. An oil inlet hole (7) and an oil outlet hole (8) are provided on the pump body (5). The oil inlet hole (7) is communicated with the lower oil hole (3). An oil delivery channel (9) is provided between the oil inlet hole (7) and the oil outlet hole (8). When the driving motor (6) works, the oil in the oil tank (2) can be output from the oil outlet hole (8) through the pump body (5). An overload channel (10) communicated with the oil delivery channel (9) is also provided in the pump body (5). A movable rod (11) is provided in the overload channel (10) and is in contact with the inner wall thereof. The movable rod (11) is provided with a plurality of movable rods. The inner end is located in the overload channel (10), and the outer end is provided with an overload spring (12). A micro switch (13) is provided outside the overload channel (10), and a pressing portion (14) is provided on the micro switch (13). The pressing portion (14) is located on the path of the movable rod (11) moving outward. When the pressure in the oil delivery channel (9) and the overload channel (10) is greater than the elastic force of the overload spring (12), the oil in the oil delivery channel (9) and the overload channel (10) overcomes the resistance of the overload spring (12) and pushes the movable rod (11) to move outward until the movable rod (11) contacts and presses down the pressing portion (14), thereby controlling the drive motor (6) to be turned off and stop working.

2. The electric grease dispenser according to claim 1, characterized in that: The movable rod (11) includes a cylindrical plug (15) which is in contact with the inner wall of the overload channel (10). A shifting rod (16) is provided on the side of the plug (15). The overload channel (10) is provided with a movable hole (17) at the position of the shifting rod (16). The shifting rod (16) extends through the movable hole (17) to the outside of the overload channel (10) and is located above the pressing portion (14). The shifting rod (16) can move up and down in the movable hole (17) and limit the maximum movement of the shifting rod (16).

3. The electric grease dispenser according to claim 2, characterized in that: An abutment portion (18) is installed at the outlet of the overload channel (10), and the abutment portion (18) is located at the rear end of the plug (15). Both ends of the overload spring (12) respectively abut against the plug (15) and the abutment portion (18).

4. The electric grease dispenser according to claim 3, characterized in that: A thread groove (19) is provided at the outlet of the overload channel (10), a threaded portion (20) adapted to the thread groove (19) is formed on the outer side of the abutting portion (18), and the abutting portion (18) is installed in the overload channel (10) via the threaded portion (20).

5. The electric grease dispenser according to claim 4, characterized in that: The length of the thread groove (19) is greater than the length of the threaded portion (20). The abutting portion (18) can be rotated to move within the range of the thread groove (19), thereby adjusting the compression degree of the overload spring (12).

6. An electric grease dispenser according to any one of claims 3 to 5, characterized in that: The movable rod (11) further comprises an extension rod (21) formed at the rear end of the plug (15); a guide hole (22) adapted to the cross-sectional shape of the extension rod (21) is provided in the middle of the abutting portion (18); the extension rod (21) passes through the guide hole (22).

7. An electric grease dispenser according to any one of claims 1 to 3, characterized in that: The pump body (5) is a plunger pump. At least one plunger (23) is provided in the pump body (5). One end of the plunger (23) is provided in the oil delivery channel (9). The driving motor (6) is directly or indirectly connected to the plunger (23) and can drive the plunger (23) to move back and forth, thereby pushing the oil in the oil delivery channel (9) toward the oil outlet. A plurality of oil outlet check valves (24) are also provided in the oil delivery channel (9).

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