Automatic lubricating unit for supplying grease to plunger when plunger moves rightwards and gets off and supplies grease to plunger when plunger moves leftwards and gets off
The automatic lubrication unit, which supplies grease to the upper vehicle on the right and the lower vehicle on the left with a plunger, solves the problem of precise grease supply in the excavator's upper and lower vehicle lubrication systems, and achieves independent control and efficient lubrication of the upper and lower vehicle lubrication systems.
Patent Information
- Application Number
- CN202422251765.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-09-13
AI Technical Summary
Existing excavator lubrication systems struggle to provide precise grease supply to the upper and lower parts, resulting in excessive or insufficient grease supply to some components, failing to meet different lubrication needs and increasing the risk of mechanical wear.
An automatic lubrication unit is designed with a plunger that supplies grease to the upper vehicle when moving right and to the lower vehicle when moving left. By using a one-way valve assembly and an oil supply channel assembly, the lubrication system for the upper and lower vehicles can be independently controlled by the left and right movement of the plunger, ensuring that the grease is distributed as needed.
Independent grease supply is achieved for the upper working mechanism and the lower traveling mechanism, ensuring that each lubrication point receives appropriate grease, preventing waste and wear, and improving lubrication efficiency.
Smart Images
Figure CN223499288U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bearing lubrication technology, specifically an automatic lubrication unit that supplies grease to the right-hand drive upper vehicle and to the left-hand drive lower vehicle. Background Technology
[0002] In the daily operation of excavators, lubrication of the upper working mechanism and the lower traveling mechanism is a crucial maintenance task. Proper lubrication not only reduces friction between mechanical parts and extends equipment lifespan, but also ensures stable performance under high loads and prolonged operation. Currently, most excavator lubrication systems use manual or semi-automatic grease supply methods, which involves periodically replenishing grease to various lubrication points on the upper working mechanism and the lower traveling mechanism using manual or electric equipment. However, these traditional lubrication systems have certain shortcomings and cannot fully meet the demands of modern excavators for efficient and intelligent lubrication.
[0003] In existing technologies, lubrication systems struggle to precisely supply grease to different parts of the excavator's upper and lower structures. Conventional lubrication methods cannot differentiate between the different lubrication needs of the working mechanism and the traveling mechanism, leading to some parts receiving excessive grease while others receive insufficient grease, increasing the risk of component wear. Due to their different operating modes, the upper working mechanism and the lower traveling mechanism require different amounts, pressures, and frequencies of lubrication. The working mechanism involves rotational motion and requires continuous and uniform lubrication, while the traveling mechanism moves more frequently and bears a greater weight, requiring more grease support. Furthermore, using simultaneous grease supply makes it difficult for the system to precisely control the amount of grease distributed, potentially resulting in some lubrication points receiving excessive grease while others receive insufficient lubrication. Utility Model Content
[0004] The purpose of this invention is to provide an automatic lubrication unit that supplies grease to the right-hand drive and the left-hand drive, in order to solve the problems mentioned in the prior art.
[0005] The purpose is to provide an automatic lubrication unit that supplies grease to the right-hand drive and the left-hand drive, in order to solve the problems mentioned in the prior art.
[0006] An automatic lubrication unit is provided for right-hand drive grease supply and left-hand drive grease supply. It includes a housing assembly comprising a housing, a pump body, and a central rotary distributor valve core. An electric push rod is mounted on the housing, and a plunger is fixedly connected to the telescopic end of the electric push rod. The plunger is slidably mounted within the pump body. A screw plug is provided on one side of the right end of the pump body, and a receiving cavity is provided between the screw plug and the plunger. An upper flow channel and a lower flow channel are symmetrically arranged on both sides inside the plunger, both of which communicate with the receiving cavity. The upper and lower flow channels communicate with each other. A first one-way valve assembly and a second one-way valve assembly are provided in the upper flow channel, and a third one-way valve assembly is provided in the lower flow channel. A temporary storage cavity is formed between the second and third one-way valve assemblies.
[0007] Grease discharge grooves are provided on both the upper and lower sides of the outer wall of the plunger. An upper oil supply channel assembly and a lower oil supply channel assembly are respectively provided on the upper and lower sides of the plunger. The upper oil supply channel assembly is located inside the pump body. The lower oil supply channel assembly is located between the pump body and the central rotary distributor valve core. The central rotary distributor valve body is located below the central rotary distributor valve core.
[0008] As a further embodiment of this utility model: the first one-way valve assembly includes a first one-way valve seat, a first spring seat, a first spring, and a first steel ball. The first one-way valve seat and the first spring seat are disposed in the upper flow channel. The first spring seat is provided with a first spring, and the first steel ball is connected to the first spring. The first steel ball is slidably connected in the upper flow channel. The first steel ball is used to seal the oil passage hole on the first one-way valve seat. The first one-way valve assembly ensures that the grease only enters the upper lubrication point when the plunger moves to the right, and prevents the grease from being sucked out through the upper grease discharge groove when the plunger moves to the left, thereby realizing one-way control of the grease flow direction.
[0009] As a further embodiment of this utility model: the second one-way valve assembly includes a second one-way valve seat, a second spring seat, a second spring, and a second steel ball. The second one-way valve seat and the second spring seat are disposed in the upper flow channel. The second spring seat is provided with a second spring, and the second steel ball is connected to the second spring. The second steel ball is slidably connected in the upper flow channel. The second steel ball is used to seal the oil passage hole on the second one-way valve seat. The second one-way valve assembly ensures that the grease can only flow into the storage chamber when the plunger moves to the right, preventing the grease from flowing back into the upper flow channel from the storage chamber when the plunger moves to the left. This assembly helps to store part of the grease, ensuring that the grease in the storage chamber can flow to the lower part when the plunger moves to the left, realizing independent control of the upper and lower lubrication systems.
[0010] As a further embodiment of this utility model: the third one-way valve assembly includes a third one-way valve seat, a third spring seat, a third spring, and a third steel ball. The third one-way valve seat and the third spring seat are disposed in the lower flow channel. The third spring seat is provided with a third spring, and the third spring is connected to a third steel ball. The third steel ball is slidably connected in the lower flow channel. The third steel ball is used to seal the oil passage hole on the third one-way valve seat. The third one-way valve assembly ensures that the grease flows into the lower part only when the plunger moves to the left, and prevents the grease from entering the lower flow channel when the plunger moves to the right. The third one-way valve ensures that the grease enters the lower lubrication point at the correct time, meeting the lubrication requirements of the excavator's lower part.
[0011] As a further embodiment of this utility model: the upper oil supply channel assembly includes a plurality of upper grease discharge holes, which are arranged along the length direction on the pump body. Each of the plurality of upper grease discharge holes is connected to a first vertical flow channel, and each of the plurality of first vertical flow channels is connected to an upper grease discharge groove through a first horizontal flow channel. The first vertical flow channel is located inside the pump body, and the upper grease discharge groove is located on one side of the upper part of the pump body. Through the interconnection of the plurality of upper grease discharge holes, vertical and horizontal flow channels, this structure ensures that the grease can be uniformly and effectively transferred to the upper grease discharge groove, thereby supplying the upper part of the excavator.
[0012] As a further embodiment of this utility model: the lower oil supply channel assembly includes a plurality of lower grease discharge holes, each of which is connected to a second vertical oil passage. These second vertical oil passages are disposed between the pump body and the central rotary distributor valve core. Each of the second vertical oil passages is connected to a lower grease discharge groove via a second horizontal flow channel. These lower grease discharge grooves are equidistantly disposed along the height direction on the central rotary distributor valve core and communicate with the oil discharge holes on the central rotary distributor valve body. When the plunger moves to the left, the grease in the temporary storage chamber passes through a third one-way valve. The grease flows into the lower channel and enters the lower grease discharge groove, gradually connecting with several lower grease discharge holes in sequence. The grease flows into its respective second vertical oil passage through these lower grease discharge holes, descends vertically through each second vertical oil passage, and then enters each lower grease discharge groove through each second horizontal channel. The grease is then discharged from the lower grease discharge groove through the oil outlet hole on the central rotary valve body to various lubrication points of the undercarriage traveling mechanism. The grease is evenly distributed to all lubrication points of the excavator's undercarriage traveling mechanism, ensuring that the undercarriage traveling mechanism receives sufficient lubrication.
[0013] As a further embodiment of this utility model: the grease discharge groove is fan-shaped. Compared with circular or other shaped holes, the fan-shaped grease discharge groove has a larger grease discharge area, which can increase the flow channel of grease in a limited space. The arc design of the edge of the fan-shaped hole helps to reduce the resistance when the grease flows out, making it easier for the grease to pass through the hole.
[0014] As a further embodiment of this utility model: a grease filling component is also provided above the housing. The grease filling component includes a grease filling mounting seat, a grease filling one-way spring seat, a grease filling spring, and a grease filling steel ball. The grease filling mounting seat is located above the receiving cavity. A grease filling one-way spring seat is provided inside the grease filling mounting seat. A grease filling spring is provided on the grease filling one-way spring seat. A grease filling steel ball is connected to the grease filling spring. The grease filling steel ball is movably connected inside the grease filling mounting seat. Grease filling channels are also provided on both sides of the grease filling mounting seat. The grease filling channels communicate with the receiving cavity.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] In the initial state, the cavity between the right end of the plunger and the screw plug on the pump body, as well as the upper and lower flow channels, are filled with grease. The grease discharge groove above the plunger is connected to the upper oil supply flow channel assembly, while the grease discharge groove below the plunger is connected to or disconnected from the lower oil supply flow channel by the pressure difference across the third one-way valve assembly. The electric push rod pushes the plunger to slide within the pump body. The rightward and leftward movement of the plunger correspond to upper and lower grease supply, respectively. Upper grease supply (plunger moves right): When the plunger moves right, the volume of the cavity between the plunger and the screw plug decreases. The grease in the compression cavity is squeezed through the upper flow channel and the first one-way valve assembly. The grease enters the upper grease discharge groove and is discharged through the upper oil supply flow channel assembly, providing lubrication to the excavator's upper lubrication point. At this time, due to the pressure difference, some grease flows into the temporary storage cavity through the second one-way valve, but the third one-way valve assembly prevents the grease from entering the storage cavity. Grease flows down the flow channel to prevent it from entering the lower carriage oil supply channel. Lower carriage grease supply (plunger moves left): When the plunger moves left, the grease in the temporary storage chamber is squeezed and flows through the third one-way valve into the lower grease discharge groove, and then out through the lower oil supply channel assembly to supply the excavator's lower carriage lubrication points. Simultaneously, the first and second one-way valves are closed during this process, preventing grease in the upper flow channel from flowing into the grease discharge groove above the plunger. This ensures that grease is only supplied to the lower carriage lubrication points, achieving separate grease supply for the upper carriage working mechanism and the lower carriage traveling mechanism. The lubrication systems of the upper carriage working mechanism and the lower carriage traveling mechanism can operate independently, ensuring that each lubrication point receives only the appropriate amount of grease, preventing waste and the risk of contamination from over-lubrication, while also avoiding mechanical wear caused by insufficient lubrication. This meets the different lubrication needs of the upper carriage working mechanism and the lower carriage traveling mechanism, improving grease utilization efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of an automatic lubrication unit with a plunger that supplies grease to the upper vehicle when moving to the right and to the lower vehicle when moving to the left.
[0019] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of region A in the middle;
[0020] Figure 3 A cross-sectional structural diagram of the plunger in the leftward displacement state provided by this utility model;
[0021] Figure 4 for Figure 3 Enlarged structural diagram of region B in the middle;
[0022] Figure 5 This is a schematic diagram of the fat replenishment component provided by this utility model.
[0023] In the diagram: 1. Housing assembly; 11. Housing; 12. Pump body; 13. Central rotary distributor valve core; 111. Plug; 112. Receiving cavity; 113. Upper flow channel; 114. Lower flow channel; 2. Electric push rod; 3. Plunger; 31. Grease discharge groove; 4. Central rotary distributor valve body;
[0024] 5. First check valve assembly; 51. First check valve seat; 52. First spring seat; 53. First spring; 54. First steel ball;
[0025] 6. Second check valve assembly; 61. Second check valve seat; 62. Second spring seat; 63. Second spring; 64. Second steel ball;
[0026] 7. Third check valve assembly; 71. Third check valve seat; 72. Third spring seat; 73. Third spring; 74. Third steel ball;
[0027] 8. Upper oil supply channel assembly; 81. Upper grease drain hole; 82. First vertical flow channel; 83. First horizontal flow channel; 84. Upper grease drain groove;
[0028] 9. Lower oil supply channel assembly; 91. Lower grease drain hole; 92. Second vertical oil channel; 93. Second horizontal channel; 94. Lower grease drain groove; 95. Oil drain hole.
[0029] 10. Grease filling assembly; 101. Grease filling mounting base; 102. Grease filling one-way spring seat; 103. Grease filling spring; 104. Grease filling steel ball; 105. Grease filling channel. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.
[0031] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.
[0032] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.
[0033] Please see Figures 1-5As shown in the embodiment of this utility model, an automatic lubrication unit for right-hand drive upper vehicle grease supply and left-hand drive lower vehicle grease supply includes a housing assembly 1. The housing assembly 1 includes a housing 11, a pump body 12, and a central rotary distributor valve core 13. An electric push rod 2 is mounted on the housing 11. The telescopic end of the electric push rod 2 is fixedly connected to a plunger 3. The plunger 3 is slidably mounted inside the pump body 12. A screw plug 111 is provided on one side of the right end of the pump body 12. A receiving cavity 112 is provided between the screw plug 111 and the plunger 3. An upper flow channel 113 and a lower flow channel 114 are symmetrically arranged on both sides inside the plunger 3. Both the upper flow channel 113 and the lower flow channel 114 communicate with the receiving cavity 112. The upper flow channel 113... 13 flows through the lower flow channel 114. The upper flow channel 113 is provided with a first one-way valve assembly 5 and a second one-way valve assembly 6. The lower flow channel 114 is provided with a third one-way valve assembly 7. A temporary storage cavity is formed between the second one-way valve assembly 6 and the third one-way valve assembly 7. Grease discharge grooves 31 are provided on both the upper and lower sides of the outer wall of the plunger 3. The upper oil supply flow channel assembly 8 and the lower oil supply flow channel assembly 9 are respectively provided on the upper and lower sides of the plunger 3. The upper oil supply flow channel assembly 8 is located inside the pump body 12. The lower oil supply flow channel assembly 9 is located between the pump body 12 and the central rotary distributor valve core 13. The central rotary distributor valve body 4 is located below the central rotary distributor valve core 13.
[0034] In the initial state, the receiving cavity 112 between the right end of the plunger 3 and the screw plug 111 on the pump body 12, as well as the upper flow channel 113 and the lower flow channel 114, are filled with grease. The grease discharge groove 31 above the plunger 3 is connected to the upper oil supply flow channel assembly 8. The grease discharge groove 31 below the stepped plunger 3 is connected to the lower oil supply flow channel assembly 9 by the pressure difference between the two ends of the third one-way valve assembly 7 in the lower flow channel 114.
[0035] When the electric push rod 2 pushes the plunger 3 to the right, it will squeeze the grease contained in the receiving cavity 112 between the right end of the plunger 3 and the screw plug 111. The grease in the upper flow channel 113 squeezes the first one-way valve assembly 5, and the internal flow channel of the first one-way valve assembly 5 opens. The lubricating grease can be discharged from the first one-way valve assembly 5 through the grease discharge groove 31 set above and gradually connected with the upper oil supply flow channel assembly 8. A small amount of grease is squeezed by the pressure difference to the second one-way valve assembly 6 and flows into the temporary storage cavity formed between the second one-way valve assembly 6 and the third one-way valve assembly 7. At this time, the third one-way valve assembly 7 seals and prevents the grease in the lower flow channel 114 from flowing out from the third one-way valve assembly 7, so that the grease discharge groove 31 set below is not connected with the lower oil supply flow channel assembly 9 and no grease enters. Only lubricating grease is provided to the upper lubrication point of the excavator to meet the lubrication needs of the upper working device of the excavator.
[0036] When the electric push rod 2 pushes the plunger 3 to the right and ends its reverse leftward movement, it will squeeze the grease inside the temporary storage chamber formed between the second one-way valve assembly 6 and the third one-way valve assembly 7 inside the plunger 3. Due to the pressure difference, the third one-way valve assembly 7 no longer obstructs the flow of grease from the lower flow channel 114 into the lower grease discharge groove 31. The channels in the first one-way valve assembly 5 and the second one-way valve assembly 6 are not flowing, preventing the grease in the upper flow channel 113 from entering the grease discharge groove 31 set at the upper part of the plunger 3. The grease discharge groove 31 set at the lower part gradually connects with the lower oil supply channel assembly 9 to discharge grease to provide lubricating grease to the lubrication point of the excavator's undercarriage traveling mechanism, meeting the lubrication needs of the excavator's undercarriage traveling mechanism. Grease is supplied to the upper carriage by the plunger 3 moving to the right and to the lower carriage by the plunger 3 moving to the left.
[0037] In one embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first one-way valve assembly 5 includes a first one-way valve seat 51, a first spring seat 52, a first spring 53, and a first steel ball 54. The first one-way valve seat 51 and the first spring seat 52 are disposed in the upper flow channel 113. The first one-way valve seat 51, located in the upper flow channel 113, has an oil passage for the passage of lubricating grease. The first spring seat 52 is provided with the first spring 53, and the first steel ball 54 is connected to the first spring 53. The first spring 53 provides elasticity to ensure that the first steel ball 54 can seal the oil passage when not compressed. The first steel ball 54 is slidably connected in the upper flow channel 113 and is used to seal the oil passage on the first one-way valve seat 51. When plunger 3 moves to the right, the grease will squeeze the first steel ball 54 sealed on the oil passage of the first one-way valve seat 51, so that the grease in the upper flow channel 113 can flow out from the oil passage of the first one-way valve seat 51 to the grease discharge groove 31 on the upper part of plunger 3. When plunger 3 moves to the left, due to the pressure difference, the grease in the upper flow channel 113 will squeeze the first spring 53 in the opposite direction to seal the oil passage of the first one-way valve seat 51, so that the grease will not enter the grease discharge groove 31 on the upper part of plunger 3. The first one-way valve assembly 5 ensures that the grease only enters the upper lubrication point when plunger 3 moves to the right, and prevents the grease from being sucked in and discharged through the upper grease discharge groove 31 when plunger 3 moves to the left, thereby realizing one-way control of the grease flow direction.
[0038] For further details, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the second one-way valve assembly 6 includes a second one-way valve seat 61, a second spring seat 62, a second spring 63, and a second steel ball 64. The second one-way valve seat 61 and the second spring seat 62 are disposed in the upper flow channel 113. The second spring 63 is disposed on the second spring seat 62, and the second steel ball 64 is connected to the second spring 63. The second steel ball 64 is slidably connected in the upper flow channel 113. The second steel ball 64 is used to seal the oil passage hole on the second one-way valve seat 61. When the plunger 3 moves to the right (upper vehicle grease supply), the grease in the upper flow channel 113 is pressurized. The grease passes through the first one-way valve assembly 5, and part of it flows into the grease discharge groove 31. Due to the pressure difference, part of the grease will pass through the oil passage hole of the second one-way valve seat 61 and push the second steel ball 64 to compress the second spring 63, causing the second one-way valve assembly 6 to open, and the grease flows out. The grease enters the temporary storage chamber and waits for the plunger 3 to move to the left to supply the lubrication points of the undercarriage. The second one-way valve assembly 6 allows the grease to flow from the upper flow channel 113 into the temporary storage chamber without returning to the upper flow channel 113. When the plunger 3 moves to the left (grease supply to the undercarriage), the grease in the temporary storage chamber attempts to flow back into the upper flow channel 113 due to the pressure difference. The second steel ball 64 is pushed back by the second spring 63, sealing the oil passage of the second one-way valve seat 61 and preventing the grease from flowing back into the upper flow channel 113. Since the second one-way valve assembly 6 is closed, the grease in the temporary storage chamber is forced to flow into the lower flow channel 114 through the third one-way valve assembly 7 and enters the lower grease discharge groove 31, gradually connecting with the lower oil supply flow channel assembly 9 to discharge the grease to provide lubricating grease to each lubrication point of the excavator's undercarriage traveling mechanism, meeting the lubrication needs of the excavator's undercarriage traveling mechanism.
[0039] For further embodiments, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the third one-way valve assembly 7 includes a third one-way valve seat 71, a third spring seat 72, a third spring 73, and a third steel ball 74. The third one-way valve seat 71 and the third spring seat 72 are disposed in the lower flow channel 114. The third spring seat 72 is provided with the third spring 73, and the third steel ball 74 is connected to the third spring 73. The third steel ball 74 is slidably connected in the lower flow channel 114. The third steel ball 74 is used to seal the oil passage hole on the third one-way valve seat 71. When the plunger 3 moves to the right, the pressure in the lower flow channel 114 is low. Under the action of the third spring 73, the third steel ball 74 is pressed tightly against the oil passage hole of the third one-way valve seat 71, sealing the oil passage hole and ensuring that the grease cannot flow into the lower flow channel 114 through the third one-way valve seat 71. When the plunger 3 moves to the right, the grease will not enter the lower part.
[0040] When the plunger 3 moves to the left, the grease in the temporary storage chamber increases in pressure, pushing the grease to flow downward through the flow channel 114. The pressure of the grease acts on the third steel ball 74, overcoming the elastic force of the third spring 73, and pushes the third steel ball 74 open from the oil passage of the third one-way valve seat 71. After the oil passage is opened, the grease flows through the oil passage on the third one-way valve seat 71 into the grease discharge groove 31 at the bottom of the plunger 3, supplying the undercarriage lubrication system of the excavator.
[0041] Furthermore, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the upper oil supply channel assembly 8 includes several upper grease discharge holes 81, which are arranged along the length of the pump body 12. Each upper grease discharge hole 81 is connected to a first vertical flow channel 82, and each first vertical flow channel 82 is connected to an upper grease discharge groove 84 via a first horizontal flow channel 83. The first vertical flow channel 82 is located inside the pump body 12, and the upper grease discharge groove 84 is located on the upper side of the pump body 12. When the plunger 3 moves to the right, lubricating grease flows from the upper part of the pump body 12. The grease is squeezed through the first one-way valve assembly 5, and the grease discharge groove 31 on the upper part of the grease plunger 3 is connected to the upper grease discharge hole 81 in sequence. The grease is then introduced into each of the first vertical flow channels 82 through the upper grease discharge hole 81. The grease flows in the first vertical flow channel 82, enters the first horizontal flow channel 83, and finally gathers in the upper grease discharge groove 84. From the upper grease discharge groove 84, the grease is delivered to each part of the excavator's upper working mechanism through the pipeline for lubrication.
[0042] Furthermore, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the lower oil supply channel assembly 9 includes several lower grease discharge holes 91, each connected to a second vertical oil passage 92. These second vertical oil passages 92 are located between the pump body 12 and the central rotary distributor valve core 13. Each of the second vertical oil passages 92 is connected to a lower grease discharge groove 94 via a second horizontal flow channel 93. The lower grease discharge grooves 94 are equidistantly positioned along the height direction on the central rotary distributor valve body 4. When the plunger 3 moves to the left, the grease in the temporary storage chamber flows into the lower flow channel 114 through the third one-way valve assembly 7, entering the lower grease discharge groove 31 and gradually mixing with... Several lower grease discharge holes 91 are connected in sequence. The grease flows into its respective second vertical oil passage 92 through the lower grease discharge holes 91. After passing through each second vertical oil passage 92, the grease flows vertically downward. Then, the grease enters each lower grease discharge groove 94 through each second horizontal flow channel 93. The grease is discharged from each lower grease discharge groove 94 through each lower grease discharge hole 95 on the upper part of the center rotary valve body. The grease is discharged through each oil discharge hole 95 to each lubrication point of the undercarriage traveling mechanism through the pipe connection. The grease is evenly distributed to each lubrication point of the excavator's undercarriage traveling mechanism to ensure that the undercarriage traveling mechanism is adequately lubricated.
[0043] Furthermore, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the grease discharge grooves 31 symmetrically arranged on the upper and lower sides of the plunger 3 are all fan-shaped, and the fan angle of the fan-shaped grease discharge grooves 31 must be less than 180 degrees. Compared with circular or other shaped holes, the fan-shaped grease discharge grooves 31 have a larger grease discharge area, which can increase the flow channel of grease in a limited space. The arc design of the edge of the fan-shaped orifice helps to reduce the resistance when the grease flows out, making it easier for the grease to pass through the orifice.
[0044] Furthermore, please refer to Figure 1 and Figure 5As shown, a grease filling assembly 10 is also provided above the housing 11. The grease filling assembly 10 includes a grease filling mounting base 101, a grease filling one-way spring seat 102, a grease filling spring 103, and a grease filling steel ball 104. The grease filling mounting base 101 is located above the receiving cavity 112. The grease filling one-way spring seat 102 is provided inside the grease filling mounting base 101. The grease filling spring 103 is provided on the grease filling one-way spring seat 102. The grease filling steel ball 104 is connected to the grease filling spring 103. The grease filling steel ball 104 is movably connected inside the grease filling mounting base 101. Oil filling channels 105 are also provided on both sides of the grease filling mounting base 101. The oil filling channels 105 communicate with the receiving cavity 112 and provide oil filling to the grease filling system. During the leftward movement, because the flow direction of the grease is opposite to the rightward movement direction, the internal flow channels of the first one-way valve assembly 5 and the second one-way valve assembly 6 will close during the grease's return flow in the upper flow channel 113. The grease cannot flow back into the receiving cavity 112. At this time, the grease in the receiving cavity 112 cannot fill the entire cavity, and a negative pressure will be generated in the receiving cavity 112 to push open the grease replenishment assembly 10, replenishing oil to prepare for the next grease injection cycle. When the plunger 3 moves to the left, the grease in the receiving cavity 112 cannot quickly fill the entire cavity because the flow direction of the grease is opposite to the movement direction of the plunger 3. When the lubricant is in a gap, the first one-way valve assembly 5 and the second one-way valve assembly 6 are closed, preventing the grease from flowing back into the receiving cavity 112. This causes a negative pressure to be generated inside the receiving cavity 112. The negative pressure inside the receiving cavity 112 pushes the grease-filling steel ball 104 away, overcoming the elastic force of the grease-filling spring 103. Under the action of the negative pressure, the grease-filling steel ball 104 is attracted downward, compressing the grease-filling spring 103, thereby opening the grease-filling channel on the grease-filling mounting seat 101. The external lubricant enters the grease-filling mounting seat 101 through the grease-filling channel on the grease-filling mounting seat 101, and flows out from the slot in the middle of the grease-filling one-way spring seat 102 into the receiving cavity 112. The system replenishes the missing grease to prepare for the next cycle and ensures the lubrication needs of the system. When the pressure in the receiving cavity 112 returns to normal or exceeds the external pressure, the grease replenishing spring 103 will push the grease replenishing steel ball 104 upward to close the grease replenishing channel, ensuring that the grease can only enter the receiving cavity 112 from the outside and will not flow back. This maintains the unidirectional flow of the grease in the system and prevents the grease from flowing back due to pressure fluctuations during the grease replenishment process. In addition, during the grease replenishment process, the grease can be directly introduced into the receiving cavity 112 through the oil replenishing channels 105 on both sides of the grease replenishing mounting base 101 to achieve grease replenishment, ensuring the stability and reliability of the grease supply.
[0045] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.
Claims
1. An automatic lubrication unit for right-hand drive grease supply and left-hand drive grease supply, comprising a housing assembly (1), said housing assembly (1) comprising a housing (11), a pump body (12), and a central rotary distributor valve core (13), characterized in that, An electric push rod (2) is provided on the housing (11). A plunger (3) is fixedly connected to the telescopic end of the electric push rod (2). The plunger (3) is slidably installed inside the pump body (12). A screw plug (111) is provided on one side of the right end of the pump body (12). A receiving cavity (112) is provided between the screw plug (111) and the plunger (3). An upper flow channel (113) and a lower flow channel (114) are symmetrically arranged on both sides inside the plunger (3). The upper flow channel (113) and the lower flow channel (114) both communicate with the receiving cavity (112), the upper flow channel (113) communicates with the lower flow channel (114), the upper flow channel (113) is provided with a first one-way valve assembly (5) and a second one-way valve assembly (6), the lower flow channel (114) is provided with a third one-way valve assembly (7), and a temporary storage cavity is formed between the second one-way valve assembly (6) and the third one-way valve assembly (7); The plunger (3) has grease discharge grooves (31) on both the upper and lower sides of its outer wall. The plunger (3) has an upper oil supply channel assembly (8) and a lower oil supply channel assembly (9) on its upper and lower sides respectively. The upper oil supply channel assembly (8) is located inside the pump body (12). The lower oil supply channel assembly (9) is located between the pump body (12) and the central rotary distributor valve core (13). The central rotary distributor valve core (13) is located below the central rotary distributor valve body (4).
2. The automatic lubrication unit for right-hand grease supply and left-hand grease supply according to claim 1, characterized in that, The first one-way valve assembly (5) includes a first one-way valve seat (51), a first spring seat (52), a first spring (53), and a first steel ball (54). The first one-way valve seat (51) and the first spring seat (52) are disposed in the upper flow channel (113). The first spring seat (52) is provided with a first spring (53), and the first steel ball (54) is connected to the first spring (53). The first steel ball (54) is slidably connected in the upper flow channel (113). The first steel ball (54) is used to seal the oil passage hole on the first one-way valve seat (51).
3. The automatic lubrication unit for right-hand grease supply and left-hand grease supply according to claim 1, characterized in that, The second one-way valve assembly (6) includes a second one-way valve seat (61), a second spring seat (62), a second spring (63), and a second steel ball (64). The second one-way valve seat (61) and the second spring seat (62) are disposed in the upper flow channel (113). The second spring seat (62) is provided with a second spring (63), and the second spring (63) is connected to the second steel ball (64). The second steel ball (64) is slidably connected in the upper flow channel (113). The second steel ball (64) is used to seal the oil passage on the second one-way valve seat (61).
4. The automatic lubrication unit for right-hand grease supply on the upper part of the vehicle and left-hand grease supply on the lower part of the vehicle, as described in claim 1, is characterized in that, The third one-way valve assembly (7) includes a third one-way valve seat (71), a third spring seat (72), a third spring (73), and a third steel ball (74). The third one-way valve seat (71) and the third spring seat (72) are disposed in the lower flow channel (114). The third spring seat (72) is provided with a third spring (73), and the third spring (73) is connected to a third steel ball (74). The third steel ball (74) is slidably connected in the lower flow channel (114). The third steel ball (74) is used to seal the oil passage hole on the third one-way valve seat (71).
5. The automatic lubrication unit for right-hand grease supply and left-hand grease supply according to claim 1, characterized in that, The upper oil supply channel assembly (8) includes a plurality of upper grease discharge holes (81), which are arranged along the length direction on the pump body (12). Each of the plurality of upper grease discharge holes (81) is connected to a first vertical channel (82), and each of the plurality of first vertical channels (82) is connected to an upper grease discharge groove (84) through a first horizontal channel (83). The first vertical channel (82) is located inside the pump body (12), and the upper grease discharge groove (84) is located on one side of the upper part of the pump body (12).
6. The automatic lubrication unit for right-hand grease supply and left-hand grease supply according to claim 5, characterized in that, The lower oil supply channel assembly (9) includes several lower grease discharge holes (91), each of which is connected to a second vertical oil passage (92). The several second vertical oil passages (92) are located between the pump body (12) and the central rotary distributor valve core (13). Each of the several second vertical oil passages (92) is connected to a lower grease discharge groove (94) through a second horizontal flow channel (93). The several lower grease discharge grooves (94) are equidistantly arranged on the central rotary distributor valve core (13) along the height direction and are connected to the oil discharge holes (95) on the central rotary distributor valve body (4).
7. The automatic lubrication unit for right-hand grease supply onboard and left-hand grease supply onboard as described in claim 6, characterized in that, The oil draining groove (31) is fan-shaped.
8. The automatic lubrication unit for right-hand grease supply and left-hand grease supply according to claim 1, characterized in that, A grease filling assembly (10) is also provided above the housing (11). The grease filling assembly (10) includes a grease filling mounting base (101), a grease filling one-way spring seat (102), a grease filling spring (103), and a grease filling steel ball (104). The grease filling mounting base (101) is located above the receiving cavity (112). The grease filling mounting base (101) is provided with a grease filling one-way spring seat (102). The grease filling one-way spring seat (102) is provided with a grease filling spring (103). The grease filling spring (103) is connected to a grease filling steel ball (104). The grease filling steel ball (104) is movably connected to the grease filling mounting base (101). Oil filling channels (105) are also provided on both sides of the grease filling mounting base (101). The oil filling channels (105) are connected to the receiving cavity (112).