JP7416546B2 - Grease quantification device - Google Patents

Description

(Cross reference to related applications)
This application claims priority to the Chinese patent application filed with the Chinese Patent Office on December 30, 2020, with application number 202011612069.1, and the entire content of this application is incorporated into this application by reference. .

TECHNICAL FIELD The present application relates to the automotive related technical field, for example, to a grease quantification device.

In the process of assembling automobile parts, it is necessary to apply grease to many parts for installation, and the amount of grease applied is strictly required. Currently, there are a wide variety of greasing methods on the market, and there are two types: manual and mechanical. In the manual greasing method, the operator uses a metering spoon to inject the corresponding amount into the relevant areas each time, and is mainly used for parts that cannot be covered by mechanical equipment. In the mechanical greasing method, the greasing system uses compressed air as the power source or an electric cylinder as the power source, and the air power source requires an independent air source device. Pneumatic booster pumps have a large external size and volume, are expensive, and provide sealed grease with high pressure and high viscosity.Due to the compressibility of gas, the pressure output of the pneumatic booster pump is unstable. Greasing systems powered by electric cylinders have limited lubrication accuracy due to the limited accuracy of the output rod or extension rod of the electric cylinder, which allows the lubrication system to quantify quickly and control the lubrication range. - The requirement of being adjustable cannot be met.

The present application provides a grease quantification device with high accuracy, low cost, stable output, and controllable and adjustable greasing range.

The greasing mechanism includes a cavity body, a piston assembly slidably disposed inside the cavity body, a hydraulic electric control valve connected to the cavity body, and a cavity end cover fixed to a front end of the cavity body. The piston assembly includes a piston and a piston rod that are fixedly connected, and the piston divides the interior of the cavity body into a first cavity and a second cavity, and has a grease supply port and a grease supply port in the cavity end cover. A discharge port is provided, the grease supply port always communicating with the second cavity, the grease supply port filling the first cavity with grease by the hydraulic electric control valve, and the grease supply port always communicating with the second cavity. a greasing mechanism in which the grease in the cavity of No. 1 is discharged from the grease discharge port by the hydraulic electric control valve;
A quantitative adjustment mechanism including a bracket, a drive mechanism fixed to the bracket, a screw transmission-connected to the drive mechanism, a fixing sleeve threadably connected to the screw, and a plunger chuck slidably provided within the fixing sleeve. The driving mechanism drives the screw to rotate to move forward or backward along the fixing sleeve, the fixing sleeve being fixedly connected to the rear end of the cavity body, and the screw rotating to move forward or backward along the fixing sleeve, A front end of the plunger chuck is connected to the piston rod, and a rear end of the plunger chuck is connected to a quantitative adjustment mechanism that abuts the screw;
A grease quantification device is provided.

An optional aspect of the grease quantification device further includes a grease discharge detection mechanism, the grease discharge detection mechanism including a fixed cover, an end sensing rod, a first compression spring, and a first position sensor, the grease discharge detection mechanism including a fixed cover, an end sensing rod, a first compression spring, and a first position sensor. A mounting hole is opened through the end cover, the fixed cover is mounted within the mounting hole, the first position sensor is fixed to one end of the fixed cover, and the end sensing rod is fixed to one end of the fixed cover. , a projection slidably passing through the fixed cover and provided on the end sensing rod, the first compression spring being fitted on the end sensing rod, and the first compression spring being fitted on the end sensing rod; one end of the first compression spring is connected to the protrusion, and the other end of the first compression spring is connected to the first position sensor, the first position sensor configured to detect the position of the end sensing rod. provided.

An optional aspect of the grease quantification device further includes a grease return detection mechanism, the grease return detection mechanism including a grease return slide rod, a second compression spring, and a second position sensor, and wherein the grease return detection mechanism includes a grease return slide rod, a second compression spring, and a second position sensor. A sliding rod is slidably disposed within the screw, one end of the grease return sliding rod is fixedly connected to the plunger chuck, and a mounting groove is further provided within the screw; a compression spring is fitted to the grease return sliding rod, one end of the second compression spring abuts the mounting groove, and the other end of the second compression spring abuts the plunger chuck; The second position sensor is provided to detect the position of the grease return sliding rod.

As an optional embodiment of the grease quantification device, the plunger chuck has a cone-like structure and has a plurality of elastic claws separated from each other at the front end of the screw, and the plunger chuck has a plurality of elastic claws separated from each other between the plurality of elastic claws. A conforming conical groove is formed, and when the plunger chuck is tightly pressed into the conical groove, the plurality of resilient pawls expand outward and lock with the internal thread of the fixing sleeve.

In an optional embodiment of the grease quantification device, a lug is further provided on the outer periphery of the plunger chuck, a sliding groove is provided on the inner wall of the fixed sleeve and extends in the axial direction of the fixed sleeve, and the lug is provided with a sliding groove extending in the axial direction of the fixed sleeve. , slidably connected to the slide groove.

In an optional embodiment of the grease quantification device, the drive mechanism includes a servo motor and a gear assembly, the servo motor being transmission connected to the screw via the gear assembly.

An optional embodiment of the grease quantification device further includes a housing overlying the gear assembly, the housing being fixedly connected to the bracket, and the second position sensor being fixed to the housing. Ru.

An optional embodiment of the grease quantification device further includes a pedestal, the stationary sleeve being secured to the pedestal, and the bracket being slidably connected to the stationary sleeve via a guide rod.

An optional embodiment of the grease quantification device includes a sealing ring between the piston rod and the fixed sleeve, between the piston and the cavity body, and between the end sensing rod and the fixed cover. It is provided.

As an optional aspect of the grease quantification device, the grease outlet is further connected to a flow rate detection mechanism provided to detect the amount of grease discharged.

FIG. 2 is a structural schematic diagram of a grease quantification device provided by an embodiment of the present application; 1 is a plan view of a grease quantification device provided by an embodiment of the present application; FIG. 3 is a cross-sectional view taken along the AA direction in FIG. 2. FIG. FIG. 3 is a structural schematic diagram after removing the housing from the grease quantification device provided by the embodiment of the present application; FIG. 3 is a structural schematic diagram after removing the drive mechanism from the grease quantification device provided by the embodiment of the present application; FIG. 3 is a structural schematic diagram of a piston assembly and plunger chuck provided by an embodiment of the present application; FIG. 3 is a structural schematic diagram of a fixing sleeve provided by an embodiment of the present application; FIG. 2 is a structural schematic diagram of a screw provided by an embodiment of the present application; 3 is a local structural schematic diagram of a grease quantification device provided by an embodiment of the present application; FIG. 10 is a structural schematic diagram after removing the grease discharge detection mechanism of FIG. 9. FIG. FIG. 11 is a sectional view taken along the first cross section of FIG. 10; FIG. 11 is a cross-sectional view taken along the second cross-section of FIG. 10; FIG. 11 is a sectional view taken along the third cross section of FIG. 10; FIG. 3 is a local structural schematic diagram of another grease quantification device provided by an embodiment of the present application; FIG. 15 is a cross-sectional view taken along the fourth cross section in FIG. 14; FIG. 15 is a sectional view taken along the fifth cross section in FIG. 14; FIG. 15 is a sectional view taken along the sixth section of FIG. 14; FIG. 15 is a sectional view taken along the seventh section of FIG. 14; FIG. 15 is a sectional view taken along the eighth section of FIG. 14;

(Explanation of symbols)
In the figure, 11 cavity body; 111 first cavity; 112 second cavity; 12 hydraulic electric control valve; 121 first connection port; 122 second connection port; 123 third connection port; 124 fourth connection port; 13 Cavity end cover; 131 Grease supply port; 132 Grease discharge port; 133 Mounting hole; 14 Piston; 15 Piston rod; 21 Bracket; 22 Drive mechanism; 221 Servo motor; 222 Gear assembly; 223 Housing; 23 Screw 231 Mounting groove; 232 Elastic claw; 233 Conical groove; 24 Fixed sleeve; 241 Slide groove; 25 Plunger chuck; 251 Lug; 31 Fixed cover; 32 End sensing rod; 321 Projection; 33 First compression spring; 34 41 Grease return sliding rod; 42 Second compression spring; 43 Second position sensor; 5 Pedestal; 6 Guide rod; 7 Seal ring; 101 First passage; 102 Second passage; 103 third passage; 104 fourth passage; 105 fifth passage; 106 sixth passage; 107 seventh passage.

The present application will now be described with reference to the drawings and examples. The examples described herein are merely illustrative of the present application and are not intended to limit the present application. For ease of explanation, only parts relevant to the present application are shown in the drawings, and not all structures are shown.

In the description of this application, unless otherwise specified and limited, the terms "coupled", "connected", "fixed" should be understood in a broad sense, e.g. it may be a fixed connection, it may be a removable It may be a connection, or it may be integral, it may be a mechanical connection, it may be an electrical connection, it may be a direct connection, or it may be an indirect connection through an intermediate medium. Often, it may be an internal communication between two elements or an interaction relationship between two elements. The meaning of the above terms in this application can be understood depending on the specific situation.

In this application, unless specified and limited to the contrary, a first feature being "on" or "below" a second feature does not include the first feature directly contacting the second feature. However, the first feature and the second feature may not be in direct contact with each other, but may be in contact with each other through other features between them. Also, the first feature being “above”, “above” and “on top” of the second feature includes the first feature being directly above and diagonally above the second feature; It only indicates that the horizontal height of the first feature is higher than the second feature. The first feature being “below”, “beneath” and “below” the second feature includes the first feature being directly below and diagonally below the second feature; It only indicates that the horizontal height of the feature is less than the second feature.

In the description of this embodiment, the terms "upper", "lower", "left", "right", and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are simply used to facilitate explanation and operation. It is for the sake of simplicity and is not intended to dictate or imply that the devices or elements shown necessarily have a particular orientation or must be constructed or operated in a particular orientation, and thus limit the application. should not be understood as such. Furthermore, the terms "first" and "second" are used merely to differentiate the descriptions and do not have any special meaning. In this embodiment, "forward" means to move upward along the axial direction of the fixed sleeve 24 in FIG. 3, and "backward" means to move upward along the axial direction of the fixed sleeve 24 in FIG. means to move down.

As shown in FIGS. 1 to 19, this embodiment provides a grease quantification device that includes a greasing mechanism and a metering adjustment mechanism. The greasing mechanism includes a cavity body 11, a piston assembly slidably provided inside the cavity body 11, a hydraulic/electrical control valve 12 connected to the cavity body 11, and a cavity end cover fixed to the front end of the cavity body 11. 13, the piston assembly includes a piston 14 and a piston rod 15 that are fixedly connected, the piston 14 dividing the interior of the cavity body 11 into a first cavity 111 and a second cavity 112, and a cavity end cover 13. A grease supply port 131 and a grease discharge port 132 are provided, the grease supply port 131 is always in communication with the second cavity 112 , and the grease supply port 131 is connected to the first cavity 111 by means of the hydraulic electric control valve 12 . can be filled, and the grease in the first cavity 111 can be discharged from the grease outlet 132 by the hydraulic electric control valve 12. The quantitative adjustment mechanism includes a bracket 21 , a drive mechanism 22 fixed to the bracket 21 , a screw 23 transmission-connected to the drive mechanism 22 , a fixed sleeve 24 threadedly connected to the screw 23 , and a fixed sleeve 24 slidable therein. A plunger chuck 25 is provided, and the drive mechanism 22 can drive the screw 23 to rotate forward or backward along the fixing sleeve 24 , the fixing sleeve 24 being located behind the cavity body 11 . The plunger chuck 25 is fixedly connected to the piston rod 15 at its front end and abuts the screw 23 at its rear end.

In the grease quantification device provided by the present application, the screw 23 is driven to rotate by the drive mechanism 22, so that the screw 23 moves along the axial direction of the fixed sleeve 24 while rotating, and the plunger chuck 25 and the piston assembly also move synchronously along the axial direction of the fixed sleeve 24, thereby making it possible to adjust the size of the first cavity 111, i.e. to change the capacity of the first cavity 111. When the first cavity 111 is filled with grease, the amount of grease at this time is a predetermined amount for discharging the grease to the outside once. In the process of discharging the grease, the pressure in the second cavity 112 is increased by injecting the grease into the second cavity 112 so that the piston 14 moves (advances) in the direction of the first cavity 111. At the same time, all the grease in the first cavity 111 is discharged to the outside by the hydraulic/electrical control valve 12, and since the amount of grease accommodated in the first cavity 111 is constant, the grease is discharged in a fixed amount. achieve. After one greasing is completed, the first cavity 111 is further filled with grease by the hydraulic electric control valve 12, and at this time, the piston is moved into the second cavity 112 by the action of the grease pressure in the first cavity 111. When the piston rod 15 and the plunger chuck 25 also move backward synchronously and the plunger chuck 25 is tightly pressed against the screw 23, the plunger chuck 25 and the piston assembly stop moving back, and at this time the piston 14 is restored to its initial position, that is, the amount of grease injected into the first cavity 111 reaches a predetermined value.

Optionally, the drive mechanism 22 of this embodiment includes a servo motor 221 and a gear assembly 222, and the servo motor 221 is transmission connected to the screw 23 via the gear assembly 222. The servo motor 221 has high control accuracy, the gear assembly 222 has reliable transmission, stable operation, and can improve the greasing accuracy of the grease quantification device. In one embodiment, a housing 223 is further provided on the outside of the gear assembly 222 to cover the gear assembly 222, and the housing 223 is fixedly connected to the bracket 21, and the provision of the housing 223 effectively protects the gear assembly 222 and protects the gear assembly 222. Increases the safety of the assembly 222 and extends its service life. In this application, the amount of displacement of the piston 14 corresponding to one revolution of the servo motor 221 is obtained through tests and calculations, and by setting the amount of output rotation of the servo motor 221, the amount of grease discharged to the outside each time can be reduced. The size of the first cavity 111 can be precisely adjusted for precise control, the precision of quantitative greasing is high, the cost is low, the volume is small, and there is no need to adopt a pneumatic booster pump. The pressure output is stable, the lubrication system can meet the requirements of fast quantification and controllable and adjustable lubrication range.

In one embodiment, the grease quantification device of this embodiment further includes a grease discharge detection mechanism for detecting discharge of grease to a predetermined position. The grease discharge detection mechanism includes a fixed cover 31, an end sensing rod 32, a first compression spring 33, and a first position sensor 34, and a mounting hole 133 is formed through the cavity end cover 13. The fixed cover 31 is mounted within the mounting hole 133, the first position sensor 34 is fixed to one end of the fixed cover 31, and the end sensing rod 32 is slidably passed through the fixed cover 31 and located at the end. The sensing rod 32 is provided with a protrusion 321, a first compression spring 33 is fitted into the end sensing rod 32, and one end of the first compression spring 33 is connected to the protrusion 321, and the first compression spring 33 is connected to the protrusion 321. The other end of the compression spring 33 is connected to a first position sensor 34 , which is provided to detect the position of the end sensing rod 32 . In this embodiment, in the process of supplying grease to the outside, the piston 14 gradually moves to the front end and pushes the grease in the first cavity 111 so that it is discharged to the outside through the grease discharge port 132. , when the front end of the piston rod 15 contacts the end sensing rod 32, it pushes the end sensing rod 32 to move forward and presses the first compression spring 33, at which time the first position sensor 34 acquires a signal that the grease has been discharged to a predetermined position, indicating that the grease in the first cavity 111 has been completely discharged and the current grease pouring process has ended. When filling the first cavity 111 with grease again, the piston assembly is retracted, the end sensing rod 32 is restored to its original position by the elastic action of the first compression spring 33, and the plunger chuck 25 is pressed against the screw 23. When the piston assembly is retracted until tight abutment, the first cavity 111 is again filled with grease. In the present embodiment, by providing a grease discharge detection mechanism, the grease quantification device can accurately obtain the situation in which the grease is supplied to the outside, making it easier to control and improving the precision of grease pouring.

In one embodiment, the grease quantification device of this embodiment further includes a grease return detection mechanism for detecting whether a predetermined position in the first cavity 111 is filled with grease. The grease return detection mechanism includes a grease return sliding rod 41, a second compression spring 42, and a second position sensor 43, and the grease return sliding rod 41 is slidably provided on the screw 23 and One end of the sliding rod 41 is fixedly connected to the plunger chuck 25, and the screw 23 is further provided with a mounting groove 231, and the second compression spring 42 is fitted into the grease return sliding rod 41 and The second compression spring 42 has one end in contact with the mounting groove 231 and the other end in contact with the plunger chuck 25, and the second position sensor 43 is fixed to the housing 223. It is provided to detect the position of the sliding rod 41. In this embodiment, when filling the first cavity 111 with grease, the piston assembly retreats, simultaneously pushing the plunger chuck 25 and the grease return sliding rod 41 to retreat, and the second compression spring 42 exerts a force. When the plunger chuck 25 is pressed tightly against the screw 23, the grease return sliding rod 41 stops moving, the second position sensor 43 detects the signal of the grease return sliding rod 41, At this time, it is shown that a predetermined position in the first cavity 111 is filled with grease. When greasing outward again, the piston assembly moves forward, and at this time, the plunger chuck 25 and the grease return sliding rod 41 also move upward due to the elastic action of the second compression spring 42 and return to their original positions. . In this embodiment, by providing a grease return detection mechanism, it is possible to accurately obtain the situation in which the first cavity 111 is filled with grease, which is easy to control, and improves the accuracy of the grease quantification device.

Optionally, as shown in FIGS. 6 to 8, the plunger chuck 25 of this embodiment has a cone-like structure, and has a plurality of elastic pawls 232 separated from each other at the front end of the screw 23, and a plurality of elastic pawls 232 that are separated from each other. A conical groove 233 that matches the shape of the plunger chuck 25 is formed between the claws 232, and when the plunger chuck 25 is tightly pressed against the conical groove 233, by expanding the plurality of elastic claws 232 outward, a plurality of The elastic pawl 232 is pressed against the internal thread of the fixed sleeve 24 and locked, preventing the piston assembly and plunger chuck 25 from retreating, ensuring that the capacity of the first cavity 111 remains unchanged, and ensuring reliability during use of the device. Improve your sexuality. A lug 251 is further provided on the outer periphery of the plunger chuck 25, a slide groove 241 is provided on the inner wall of the fixed sleeve 24 and extends in the axial direction, and the lug 251 is slidably connected to the slide groove 241. , the sliding fit between the lug 251 and the slide groove 241 improves the movement accuracy of the plunger chuck 25.

In one embodiment, the grease quantification device of this embodiment further includes a pedestal 5, and the fixing sleeve 24 is fixed to the pedestal 5. In one embodiment, the fixing sleeve 24 includes a first connecting segment exhibiting a cylindrical structure and a second connecting segment exhibiting a rectangular structure, the interior of the first connecting segment having a threaded connection to the screw 23. The second connecting segment is fixed to the base 5, and a through hole is provided inside the second connecting segment for the piston rod 15 to pass through, and The through hole matches the diameter of the piston rod 15. In one embodiment, between the piston rod 15 of this embodiment and the second connecting segment of the fixed sleeve 24, between the piston 14 and the cavity body 11, and between the end sensing rod 32 and the fixed cover 31. , a sealing ring 7 is provided, which ensures the sealing properties of the entire system and improves the control accuracy and reliability of the device in use. Preferably, the bracket 21 is further provided with a guide rod 6, the first connecting segment of the fixing sleeve 24 is provided with a flange, the flange is provided with a sliding groove, and the guide rod 6 is inserted into the sliding groove. This provides a slidable connection between the bracket 21 and the fixing sleeve 24, and this provision improves the accuracy and stability of the screw 23 movement. In addition, in this embodiment, a flow rate detection mechanism such as a flow meter can be further connected to the grease discharge port 132 in order to detect the amount of grease discharged, thereby forming feedback for the entire device, and the first to facilitate adjusting the size of the cavity 111 or modifying other structures.

The operating principle of the greasing mechanism of the present application will be described below with reference to FIGS. 10 to 19. In this embodiment, the hydraulic electric control valve 12 may optionally be a three-position four-way solenoid valve, with a first connection port 121, a second connection port 122, a third connection port 123 and a fourth connection port 123. Includes a connection port 124. A first passage 101, a third passage 103, a fourth passage 104, a fifth passage 105, and a sixth passage 106 are opened in the cavity body 11, and a second passage 102 is opened in the cavity end cover 13. A seventh passage 107 is opened in the second connecting segment of the fixing sleeve 24 . The first passage 101 is provided along the axial direction of the cavity body 11, and one end of the first passage 101 is connected to the first connection port 121, and the other end communicates with the second passage 102. The second passage 102 is provided along the longitudinal direction of the cavity end cover 13 and communicates with the first cavity 111. The third passage 103 is provided along the axial direction of the cavity body 11, and one end of the third passage 103 communicates with the grease discharge port 132, and the other end communicates with the sixth passage 106. The sixth passage 106 is provided along the lateral direction of the cavity body and is connected to the fourth connection port 124. The fourth passage 104 is provided along the axial direction of the cavity body 11, and one end of the fourth passage 104 communicates with the grease supply port 131, the other end communicates with the seventh passage 107, and the fourth passage 104 has a central portion. communicates with the fifth passage 105. The seventh passage 107 is provided along the lateral direction of the fixed sleeve 24 and communicates with the second cavity 112 . The fifth passage 105 is provided in the cavity main body 11 in an inclined manner, and one end of the fifth passage 105 communicates with the fourth passage 104 and the other end is connected to the third connection port 123. The second connection port 122 is in an empty position and is not connected to any passage.

In this embodiment, when filling the first cavity 111 with grease, the hydraulic electric control valve 12 supplies the grease to the grease supply port 131, the fourth passage 104, the fifth passage 105, and the third connection port 123 in order. , the grease enters the first cavity 111 through the first connection port 121, the first passage 101, and the second passage 102, and at the same time, some of the grease in the second cavity 112 is The first cavity 111 via the seventh passage 107, the fourth passage 104, the fifth passage 105, the third connection port 123, the first connection port 121, the first passage 101, and the second passage 102. to go into.

In this embodiment, when the grease in the first cavity 111 is discharged to the outside, the hydraulic/electrical control valve 12 causes the grease to be discharged from the second passage 102, the first passage 101, the first connection port 121, and the first connection port 121 in order. 4 connection port 124, sixth passage 106, third passage 103, and grease discharge port 132. Fill with grease.

This embodiment is not limited to this embodiment, as it can be used not only to dispense a fixed amount of grease, but also to dispense other liquids.

Claims (9)

a cavity body (11), a piston assembly slidably disposed inside said cavity body (11), a hydroelectric control valve (12) connected to said cavity body (11), and said cavity body (11); A greasing mechanism includes a cavity end cover (13) fixed to the front end, the piston assembly includes a piston (14) and a piston rod (15) fixedly connected, the piston (14) The inside of the cavity body (11) is divided into a first cavity (111) and a second cavity (112), and the cavity end cover (13) is provided with a grease supply port (131) and a grease discharge port (132). The grease supply port (131) always communicates with the second cavity (112), and the grease supply port (131) is connected to the first cavity (111) by the hydraulic electric control valve (12). ), the grease in the first cavity (111) can be discharged from the grease outlet (132) by the hydraulic/electrical control valve (12);
A bracket (21), a drive mechanism (22) fixed to the bracket (21), a screw (23) transmission-connected to the drive mechanism (22), and a fixing sleeve (24) screwed to the screw (23). ), and a plunger chuck (25) that is slidably provided within the fixed sleeve (24), the drive mechanism (22) is configured to rotate the screw (23) so that the It can be driven forward or backward along a fixed sleeve (24), the fixed sleeve (24) is fixedly connected to the rear end of the cavity body (11), and the front end of the plunger chuck (25) is , a quantitative adjustment mechanism connected to the piston rod (15) , the rear end of which abuts the screw (23);
A grease quantification device comprising:
The plunger chuck (25) has a conical structure and has a plurality of elastic claws (232) separated from each other at the front end of the screw (23), and the plunger chuck (25) has a plurality of elastic claws (232) separated from each other at the front end of the screw (23). A conical groove (233) is formed that matches the shape of the chuck (25), and when the plunger chuck (25) is tightly pressed into the conical groove (233), the plurality of elastic claws (232) Said grease quantification device, characterized in that it expands outward and locks with the internal thread of said fixing sleeve (24). further comprising a grease discharge detection mechanism, the grease discharge detection mechanism including a fixed cover (31), an end sensing rod (32), a first compression spring (33) and a first position sensor (34); A mounting hole (133) is formed through the cavity end cover (13), the fixed cover (31) is mounted in the mounting hole (133), and the first position sensor (34) is mounted in the mounting hole (133). , fixed to one end of the fixed cover (31), the end sensing rod (32) slidably passes through the fixed cover (31), and has a protrusion (321) on the end sensing rod (32). is provided, the first compression spring (33) is fitted into the end sensing rod (32), and one end of the first compression spring (33) is connected to the protrusion (321). and the other end is connected to the first position sensor (34), and the first position sensor (34) is used to detect the position of the end sensing rod (32). 1. The grease quantification device according to 1. The grease return detection mechanism further includes a grease return sliding rod (41), a second compression spring (42), and a second position sensor (43), and the grease return sliding rod (41) is slidably provided within the screw (23), and one end of the grease return sliding rod (41) is fixedly connected to the plunger chuck (25) and is provided within the screw (23). A mounting groove (231) is further provided, the second compression spring (42) is fitted into the grease return sliding rod (41), and one end of the second compression spring (42) is , abuts on the mounting groove (231) , the other end abuts on the plunger chuck (25), and the second position sensor (43) detects the position of the grease return sliding rod (41). Grease quantification device according to claim 1 or 2 , which is used in particular . A lug (251) is further provided on the outer periphery of the plunger chuck (25), and a slide groove (241) extending in the axial direction is provided on the inner wall of the fixed sleeve (24). The grease quantification device according to claim 1, wherein (251) is slidably connected to the slide groove (241). The drive mechanism (22) includes a servo motor (221) and a gear assembly (222), and the servo motor (221) is transmission connected to the screw (23) via the gear assembly (222). The grease quantification device according to item 3. A housing (223) is further provided to cover the outside of the gear assembly (222), the housing (223) is fixedly connected to the bracket (21), and the second position sensor (43) is connected to the Grease quantification device according to claim 5 , fixed to the housing (223). further comprising a pedestal (5), the fixed sleeve (24) is fixed to the pedestal (5), and the bracket (21) is slidable on the fixed sleeve (24) via a guide rod (6). A grease quantification device according to claim 1, which is connected to a grease quantification device. between the piston rod (15) and the fixed sleeve (24), between the piston (14) and the cavity body (11), and between the end sensing rod (32) and the fixed cover (31). Grease quantification device according to claim 2, characterized in that both are provided with a sealing ring (7). The grease quantification device according to claim 1, further comprising a flow rate detection mechanism connected to the grease discharge port (132) for use in detecting the amount of grease discharged.