Plunger Grease Filling Machine

Abstract

The present invention discloses a plunger grease replenishing machine, which is mainly composed of a motor reducer, a cam, a deep groove ball bearing, a dial wheel, a reset spring, a push rod tail rod, a cam shift shaft, a sealing ring, a steel pipe tail seat, a steel pipe, a push rod, an outer shell cylinder, an outer cylinder straight notch, an inner shell cylinder, an inner cylinder slide groove, an inner cylinder straight notch, a small spring, a steel ball, a piston, a piston flange, and an oil outlet. The motor reducer is installed on a frame, and its output shaft is fixedly connected to the cam. A semicircular arc cam shift shaft is symmetrically arranged at the bottom of the cam; the deep groove ball bearing is embedded in the top of the cam and rotates with the cam. The present invention is relatively simple and compact in structure, saves manufacturing costs, and solves the disadvantage of low efficiency of traditional plunger grease replenishing machines in low temperature environments.

Description

Technical Field

[0001] The invention belongs to the field of grease conveying equipment in a centralized lubrication system, in particular to a plunger grease replenishing machine which has high grease replenishing efficiency and can replenish grease efficiently in a low-temperature environment. Background Art

[0002] Lubricating equipment generally uses oil bunkers or oil tanks to store grease, and refueling the bunkers or oil tanks is generally a manual operation. There are almost no reliable and practical grease replenishing machines on the market. The front end of the existing grease replenishing machine plunger pump usually uses two one-way valves (suction one-way valve and pressure one-way valve) to achieve the grease replenishing function. In low temperature environments, the fluidity of grease is very poor. When absorbing oil, it is necessary to overcome the resistance of the one-way valve to enter the plunger cavity. The oil absorption efficiency is very low, and the grease replenishment is slow. When the ambient temperature is low, the grease replenishment may not even be possible.

[0003] At present, most plunger pumps have two one-way valves, or the suction hole is fixed and sealed by the piston movement, and a pressure oil one-way valve is used. The one-way valve structure is used for suction, and the suction efficiency is very low at low temperatures, resulting in low efficiency or even failure of grease replenishment; the structure with the suction hole fixed and sealed by the piston movement sacrifices the plunger stroke, which also reduces efficiency. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a plunger grease replenishing machine which is relatively simple and compact in structure and solves the problem of low efficiency of traditional plunger grease replenishing machines in low temperature environments.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a plunger grease replenishing machine, which is mainly composed of a motor reducer, a cam, a deep groove ball bearing, a dial wheel, a reset spring, a push rod and a tail rod, a cam shift shaft, a sealing ring, a steel pipe tail seat, a steel pipe, a push rod, an outer shell cylinder, an outer cylinder straight notch, an inner shell cylinder, an inner cylinder slide groove, an inner cylinder straight notch, a small spring, a steel ball, a piston, a piston flange, and an oil outlet. It is characterized in that: the motor reducer is installed on a frame, and its output shaft is fixedly connected to the cam, and a semicircular arc cam shift shaft is symmetrically arranged at the bottom of the cam; the deep groove ball bearing is embedded in the top of the cam and rotates with the cam. The cam is rotated; the circumference of the thumbwheel is provided with 8 thumb teeth, and a square shaft hole is provided at the center thereof for installation on the mandrel and tail rod; the end of the mandrel and tail rod passes through the square shaft hole of the thumbwheel and abuts against the outer ring of the deep groove ball bearing, and when the cam rotates, the sliding friction is converted into rolling friction to reduce the friction resistance and power consumption; the mandrel and tail rod are provided with three-level step surfaces, the first-level step surface at the front end is a hollow cylinder with an internal thread, the second-level step surface in the middle is a cylinder, and the third-level step surface at the tail is a square column; the steel pipe tailstock is sleeved on the outer wall of the mandrel and tail rod, and a sealing groove is provided on the cylinder at the front end of the mandrel and tail rod, in which a sealing groove is installed There is a sealing ring to prevent grease from leaking out under pressure; the return spring is sleeved on the secondary step surface of the push rod and tail rod, and there is a compression between it and the dial wheel; an oil outlet is arranged on the front end side wall of the steel pipe tail seat, and a step surface is arranged at the front end of the internal oil outlet, and a steel pipe is installed in the step surface; the rear part of the steel pipe tail seat is threadedly connected and fixed with the frame to ensure that the dial wheel, the push rod and tail rod, the steel pipe tail seat and the steel pipe are in a straight line and are 90 degrees with the motor reducer, the cam and the deep groove ball bearing; a push rod is installed inside the steel pipe, and the end of the push rod is connected and fixed with the internal thread at the front end of the push rod and tail rod, and the front end of the push rod is axially arranged A main oil passage is arranged, and an oil distribution passage which is perpendicular to the main oil passage is arranged at the end of the main oil passage; an outer shell inner tube and a piston are sequentially sleeved in the outer shell outer tube, and four outer tube straight grooves and inner tube straight grooves are symmetrically opened on the circumferential side walls of the end portions of the outer shell outer tube and the outer shell inner tube; a sealing ring is arranged between the outer wall of the piston and the inner wall of the outer shell inner tube, and the piston flange at the rear of the piston is plugged into the slide groove of the outer shell inner tube and can slide relatively; the front end of the push rod, a small spring and a steel ball are sequentially installed inside the piston from left to right; an oil inlet is arranged at the top axis of the piston; the front end of the steel pipe is threadedly connected to the inner wall of the outer shell outer tube.

[0006] The aforementioned plunger grease replenishing machine is characterized in that: the steel pipe tailstock, steel pipe, outer shell cylinder are fixed relative to the frame, motor reducer, dial wheel, push rod tail rod, push rod, piston, and inner shell cylinder; when the dial wheel rotates one eighth of a circle, the push rod tail rod, push rod, piston, and inner shell cylinder also rotate one eighth of a circle.

[0007] The above plunger grease replenishing machine is characterized in that the front end of the push rod is fixedly connected to the internal thread of the piston.

[0008] The above plunger grease replenishing machine is characterized in that an inner tube slide groove is provided at the tail of the outer shell inner tube, and the piston flange at the tail of the piston can drive the outer shell inner tube to rotate while sliding left and right in the inner tube slide groove.

[0009] The above plunger grease replenishing machine is characterized in that the straight notches of the outer cylinder and the straight notches of the inner cylinder are in the same phase.

[0010] The above plunger grease replenishing machine is characterized in that: the driving power supply of the motor reducer is 24V DC, a fuse is connected in series in the circuit, the machine can work by starting the switch and stop by turning off the switch, and the operation is simple.

[0011] The invention is relatively simple and compact in structure, saves manufacturing cost, and solves the disadvantage of low efficiency of traditional plunger-type fat replenishing machines in low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of the oil absorption state of the present invention.

[0013] Figure 2 It is a cross-sectional view of the oil pressure state of the present invention.

[0014] Figure 3 It is a cross-sectional view of the cam of the present invention.

[0015] Figure 4 It is a top view of the cam of the present invention.

[0016] Figure 5 It is the left side view of the cam of the present invention.

[0017] Figure 6 It is a cross-sectional view of the thumbwheel of the present invention.

[0018] Figure 7 It is a side view of the thumbwheel of the present invention.

[0019] Figure 8 It is a cross-sectional view of the assembly of the outer shell cylinder and the inner shell cylinder of the present invention.

[0020] Fig. 9 It is a circuit schematic diagram of the present invention.

[0021] Fig.10 It is an enlarged view of point A of the present invention.

[0022] Fig.11 It is an enlarged view of point B of the present invention.

[0023] 0. Frame, 1. Motor reducer, 2. Cam, 3. Deep groove ball bearing, 4. Pulley, 5. Return spring, 6. Push rod and tail rod, 7. Cam pulley, 8. Sealing ring, 9. Steel pipe tail stock, 10. Steel pipe, 11. Push rod, 12. Outer cylinder of outer shell, 12B, Straight slot of outer cylinder, 13. Inner cylinder of outer shell, 13A, Slide groove of inner cylinder, 13B, Straight slot of inner cylinder, 14. Small spring, 15. Steel ball, 16. Maintenance port, 17. Main oil channel, 17A, Oil distribution channel, 18. Piston, 18A, Piston flange, 19. Oil outlet. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding and description of the technical solution of the present invention, the left and right directions of the drawings are used as the left and right directions of the drawings, the left end is the tail of the description, and the right end is the front end or the front of the description.

[0025] Figure 1-Figure 11It is a preferred embodiment of the present invention, which shows a plunger grease replenishing machine, which is mainly composed of a motor reducer, a cam, a deep groove ball bearing, a dial wheel, a reset spring, a push rod and a tail rod, a cam shift shaft, a sealing ring, a steel pipe tail seat, a steel pipe, a push rod, an outer shell cylinder, an outer cylinder straight notch, an inner shell cylinder, an inner cylinder slide groove, an inner cylinder straight notch, a small spring, a steel ball, a piston, a piston flange, and an oil outlet. It is characterized in that: the motor reducer is installed on a frame, and its output shaft is fixedly connected to the cam, and a semicircular arc cam shift shaft is symmetrically arranged at the bottom of the cam; the deep groove ball bearing is embedded in the top of the cam and rotates with the cam; the dial The circumference of the wheel is provided with 8 shifting teeth, and a square shaft hole is provided at the center thereof for installation on the mandrel and tail rod; the ends of the mandrel and tail rod pass through the square shaft hole of the shifting wheel and abut against the outer ring of the deep groove ball bearing, so that when the cam rotates, the sliding friction is converted into rolling friction to reduce the friction resistance and power consumption; the mandrel and tail rod are provided with three-level step surfaces, the first-level step surface at the front end is a hollow cylinder with an internal thread, the second-level step surface in the middle is a cylinder, and the third-level step surface at the tail is a square column; the steel pipe tail seat is sleeved on the outer wall of the mandrel and tail rod, and a sealing groove is provided on the cylinder at the front end of the mandrel and tail rod, in which a sealing ring is installed, Prevent grease from leaking out under pressure; the return spring is sleeved on the secondary step surface of the push rod and tail rod, and there is a compression between it and the thumbwheel; an oil outlet is arranged on the front end side wall of the steel pipe tail seat, and a step surface is arranged at the front end of the internal oil outlet, and a steel pipe is installed in the step surface; the rear part of the steel pipe tail seat is threadedly connected and fixed with the frame to ensure that the thumbwheel, push rod and tail rod, steel pipe tail seat and steel pipe are in a straight line and at a 90-degree angle with the motor reducer, cam and deep groove ball bearing; a push rod is installed inside the steel pipe, and the end of the push rod is fixedly connected with the internal thread at the front end of the push rod and tail rod, and a main thread is axially arranged at the front end of the push rod An oil passage, an oil branch passage vertically connected to the main oil passage is arranged at the end of the main oil passage; an outer shell inner tube and a piston are sequentially sleeved in the outer shell outer tube, and four outer tube straight slots and inner tube straight slots are symmetrically opened on the circumferential side walls of the end portions of the outer shell outer tube and the outer shell inner tube; a sealing ring is arranged between the outer wall of the piston and the inner wall of the outer shell inner tube, and the piston flange at the rear of the piston is plugged into the slide groove of the outer shell inner tube and can slide relatively; the front end of the push rod, a small spring and a steel ball are sequentially installed inside the piston from left to right; an oil inlet is arranged at the top axis of the piston; the front end of the steel pipe is threadedly connected to the inner wall of the outer shell outer tube.

[0026] The above plunger grease replenishing machine is characterized in that: the steel pipe tailstock, steel pipe, outer shell cylinder are fixed relative to the frame and motor reducer; when the dial wheel rotates one-eighth of a circle, the push rod, tail rod, push rod, piston, and inner shell cylinder also rotate one-eighth of a circle.

[0027] The above plunger grease replenishing machine is characterized in that the front end of the push rod is fixedly connected to the internal thread of the piston.

[0028] The above plunger grease replenishing machine is characterized in that an inner tube slide groove is provided at the tail of the outer shell inner tube, and the piston flange at the tail of the piston can drive the outer shell inner tube to rotate while sliding left and right in the inner tube slide groove.

[0029] The above plunger grease replenishing machine is characterized in that the straight notches of the outer cylinder and the straight notches of the inner cylinder are in the same phase.

[0030] The above plunger grease replenishing machine is characterized in that: the driving power supply of the motor reducer is 24V DC, a fuse is connected in series in the circuit, the machine can work by starting the switch and stop by turning off the switch, and the operation is simple.

[0031] Working process:

[0032] 1. When the motor reducer is started, 2 cams and 3 deep groove ball bearings make eccentric motion. When the eccentricity changes from large to small, 5 reset springs reset 6 push rod tail rod to the left in the figure, and at the same time drive 11 push rod and 18 piston to move to the left, the piston chamber volume increases, and the grease is sucked into the inner tube of the outer shell 13. When it is about to run to the end of the stroke, the dial shaft on the 2 cam drives 4 dial wheels to move around the axis (the example is 1 / 8 circle), so that 6 push rod tail rod, 11 push rod, 18 piston and 13 outer shell inner tube rotate (the example is 1 / 8 circle), 13B inner tube straight slot and 12B outer tube straight slot rotate to staggered positions, and the oil suction process ends.

[0033] Compared with the plunger pump principle on the market, the present invention has 4 straight slots in the circumference of the inner cylinder of the outer shell 13 and the outer cylinder of the outer shell 12 respectively to allow grease to pass through, and the oil suction efficiency is greatly improved.

[0034] 2. After the oil suction is completed, the eccentricity of the 2nd cam and the 3rd deep groove ball bearing changes from small to large, causing the 6th push rod tail rod to move to the right in the figure, and at the same time driving the 11th push rod and the 18th piston to move to the right, the piston cavity volume decreases, and the grease pressure in the closed cavity increases to push the 15th steel ball into the 11th push rod. When the eccentricity is about to reach the maximum value, the dial shaft on the 2nd cam drives the 4th dial wheel to rotate around the axis (the example is 1 / 8 turn), causing the 6th push rod tail rod, the 11th push rod, the 18th piston and the 13th outer shell inner cylinder to rotate (the example is 1 / 8 turn), the 13B inner cylinder straight groove and the 12B outer cylinder straight groove are aligned and connected, and the internal cavity forms an open space, the oil pressure process ends, and enters the next oil suction process.

[0035] 3. The reduction motor keeps running, and the grease is continuously pressed into the interior of the ejector rod 11. When the interior of the ejector rod 11 is filled, the grease is transported to the steel pipe 10 through its four oil discharge ports, and finally discharged from the oil outlet 19.

[0036] The plunger grease filling machine is powered by a safe 24V DC power supply. Press the start button SB to start the motor. Press SB again after the operation is completed to stop the machine. FU is a safety fuse.

[0037] The present invention eliminates the two one-way valve structures of the plunger pump on the market and uses a straight slot to absorb oil. When the inner and outer straight slots are in a communicating state, the grease replenisher absorbs oil; when the straight slots are in a completely closed state, the grease replenisher presses oil. The oil absorption speed is fast, the oil absorption resistance is small, and it can operate stably even in a low temperature environment; a certain gap is reserved between the outer cylinder of the outer shell 12 and the inner cylinder of the outer shell 13 to facilitate the rotation of the inner cylinder of the outer shell 13, and a certain amount of grease is filled in the gap to play a sealing role; two 8 sealing rings are added at the end of the 6th push rod tail rod and the front end of the 18th piston to seal the leakage of high-pressure grease.

[0038] In addition, the present invention also has:

[0039] 1. Rapid grease replenishment and low temperature resistance: Different from the general plunger pump oil suction structure, the present invention adopts the relative rotation of the inner and outer cylinders to realize the opening and closing of the oil suction straight slot, and the inner and outer oil suction straight slots are large enough when the diameter is opened, and the grease resistance is extremely small. Even in a low temperature environment, the grease can be smoothly sucked in when the fluidity is poor.

[0040] 2. The driving cam and lever are designed as one piece to achieve the correct match between linear motion and rotational motion.

[0041] 3. The rotary opening and closing of the oil suction port does not consume the plunger stroke, and the rotary opening and closing is completed when the motor load is minimum, which effectively reduces the power requirement for the power supply.

[0042] The similar products and functions described above are extensions of the present invention and should be protected.

Claims

1. The plunger grease replenishing machine is mainly composed of a motor reducer, a cam, a deep groove ball bearing, a dial wheel, a reset spring, a push rod and tail rod, a cam dial shaft, a sealing ring, a steel pipe tail seat, a steel pipe, a push rod, an outer shell cylinder, an outer cylinder straight notch, an inner shell cylinder, an inner cylinder slide groove, an inner cylinder straight notch, a small spring, a steel ball, a piston, a piston flange, and an oil outlet. The characteristics are: The motor reducer is installed on the frame, and its output shaft is fixedly connected to the cam. A semi-circular arc cam shift shaft is symmetrically arranged at the bottom of the cam; the deep groove ball bearing is embedded in the top of the cam and rotates with the cam; the circumference of the thumbwheel is provided with 8 shift teeth, and a square shaft hole is provided at the center thereof for installation on the push rod and tail rod; the ends of the push rod and tail rod pass through the square shaft hole of the thumbwheel and abut against the outer ring of the deep groove ball bearing, and when the cam rotates, the sliding friction is converted into rolling friction to reduce the friction resistance and power consumption; the push rod and tail rod are provided with three-level step surfaces, and the first-level step surface at the front end is a hollow cylinder The steel pipe tailstock is sleeved on the outer wall of the mandrel and tail rod, and a sealing groove is provided on the cylinder at the front end of the mandrel and tail rod, and a sealing ring is installed in it to prevent grease from leaking out under pressure; the reset spring is sleeved on the secondary step surface of the mandrel and tail rod, and there is a compression amount between it and the thumbwheel; an oil outlet is provided on the front side wall of the steel pipe tailstock, and a step surface is provided at the front end of the internal oil outlet, and a steel pipe is installed in the step surface; the rear part of the steel pipe tailstock is threadedly connected and fixed to the frame to ensure that the thumbwheel, mandrel and tail rod, steel pipe The tailstock and the steel pipe are in a straight line and are at 90 degrees with the motor reducer, the cam and the deep groove ball bearing; a push rod is installed inside the steel pipe, and the end of the push rod is fixedly connected with the internal thread of the front end of the push rod tail rod, and a main oil channel is axially arranged at the front end of the push rod, and an oil distribution channel vertically connected to the main oil channel is arranged at the end of the main oil channel; the outer tube of the outer shell is sequentially sleeved with the outer tube of the outer shell and the piston, and 4 outer tube straight grooves and inner tube straight grooves are symmetrically opened on the circumferential side walls of the end of the outer tube of the outer shell and the inner tube of the outer shell; a sealing ring is arranged between the outer wall of the piston and the inner wall of the inner tube of the outer shell, and the piston flange at the rear of the piston It is plugged into the slide groove of the outer shell inner tube and can slide relatively; the front end of the push rod, a small spring and a steel ball are installed in sequence inside the piston from left to right; an oil inlet is arranged at the top axis of the piston; the front end of the steel pipe is threadedly connected to the inner wall of the outer shell outer tube; the steel pipe tail seat, steel pipe and outer shell outer tube are fixed relative to the frame and the motor reducer; for every one-eighth rotation of the dial wheel, the push rod, tail rod, push rod, piston and outer shell inner tube also rotate one-eighth of a circle; the tail of the outer shell inner tube is provided with an inner tube slide groove, and the piston flange at the tail of the piston can drive the outer shell inner tube to rotate while sliding left and right in the inner tube slide groove.

2. The plunger grease replenishing machine according to claim 1, characterized in that: The front end of the push rod is connected and fixed with the internal thread of the piston.

3. The plunger grease replenishing machine according to claim 1, characterized in that: The straight notches of the outer cylinder and the straight notches of the inner cylinder are in the same phase.

4. The plunger grease replenishing machine according to claim 1, characterized in that: The driving power supply of the motor reducer is 24V DC, and a fuse is connected in series in the circuit.

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