Portable quantitative glue grease filling device and quantitative control method thereof

Abstract

The invention belongs to the field of jelly distribution and conveying, and particularly discloses a portable quantitative gum filling device and a quantitative control method thereof, the portable quantitative gum filling device comprises a filling valve block, a rotary valve core, a quantitative cylinder, a nozzle and a stepping motor, a central valve core hole is formed in the filling valve block, an oil supply hole channel and an oil outlet hole channel are communicated, and a first hole channel and a second hole channel are formed in one side of the filling valve block. The rotary valve element is located in the valve element hole, a groove and a boss are arranged on the periphery of the rotary valve element, and connection and disconnection of the hole channel are controlled through rotation. The quantitative cylinder is fixedly connected with the filling valve block, the internal piston body is divided into an upper cavity and a lower cavity, the upper cavity communicates with the first hole channel, and the lower cavity communicates with the second hole channel. The nozzle is connected to the oil outlet hole channel. The stepping motor is fixedly connected to the top of the valve block and drives the rotary valve element to rotate, and accurate control is achieved. A pneumatic system and a pneumatic pipeline of the pneumatic system are omitted, and the device is simple in structure, small in size, light in weight, reliable in operation, different from a traditional pneumatic proportional valve, independent of a high-pressure air source and capable of achieving continuous quantitative filling of rubber grease on specific occasions.

Description

Technical Field

[0001] The present invention relates to the field of colloid dispensing and conveying, and particularly to a portable quantitative grease filling device and its quantitative control method. Background Art

[0002] In the fields of industrial production, mechanical maintenance, and lubrication of various equipment, grease filling devices are indispensable tools. Currently, there are mainly two common forms of grease filling devices.

[0003] One is a handheld electric grease gun. This device has the advantages of strong portability and simple operation, and can conveniently perform filling operations at different positions and angles. However, it cannot achieve quantitative filling of grease, which is particularly inconvenient in occasions where strict requirements are imposed on the filling volume, and it is easy to cause too much or too little filling volume, affecting the lubrication effect and service life of the equipment.

[0004] The other is a dry grease or liquid gelatin conveying device with a pneumatic metering valve as the core component. This device can achieve quantitative filling of solid lubricants such as grease and colloid through the pneumatic metering valve, thus effectively solving the problem of filling volume control. However, this solution also has many limiting factors. First, the pneumatic metering valve needs to rely on pneumatic transmission as the power to achieve the commutation operation of the pneumatic valve, which must be equipped with a relatively large air storage tank and air pump, increasing the volume and weight of the equipment and greatly reducing the portability of the entire device. Second, the air storage tank and air pump also need to be independently powered, further restricting its application in working environments where it is difficult to obtain a power source in the wild or where the air source is not easily accessible.

[0005] In summary, the existing grease filling devices have certain limitations in terms of portability, quantitative filling function, and applicable environment, and it is difficult to meet diverse working requirements. There is an urgent need to develop a new type of grease filling device that can overcome the above deficiencies. Summary of the Invention

[0006] The purpose of the present invention is to provide a portable quantitative grease filling device and its quantitative control method to solve the above technical problems existing in the prior art.

[0007] To achieve the above purpose, in one aspect, the present invention provides a portable quantitative grease filling device, including:

[0008] A filling valve block with a valve core hole opened in the center, the valve core hole communicating with an oil supply channel and an oil outlet channel, and a first channel and a second channel are opened on one side of the filling valve block and penetrate through to the valve core hole;

[0009] A rotary valve core that rotates in the valve core hole and is used to control the connection and disconnection of the internal channels of the filling valve block. A plurality of grooves and protrusions are provided on the outer peripheral side of the rotary valve core to control the connection and disconnection of each channel;

[0010] A metering cylinder, fixedly connected to the filling valve block, with a piston body sliding inside it in a piston type. The piston body divides the inner cavity of the metering cylinder into an upper cavity and a lower cavity. The upper cavity is communicated with the first channel through a third channel, and the lower cavity is communicated with the second channel through a fourth channel;

[0011] A nozzle, connected to the oil outlet channel of the filling valve block;

[0012] A stepper motor, fixedly connected to the top of the filling valve block, and its output shaft is in transmission connection with a rotary valve core.

[0013] In some alternative embodiments of the present invention, first notches and second notches are symmetrically recessed inwardly on the outer peripheral side of the rotary valve core. A third notch is recessed inwardly on the rotary valve core below the first notch. An annular channel communicating the two is provided above the first notch and the second notch. A sector channel communicating with it is provided below the third notch.

[0014] In some alternative embodiments of the present invention, the communication and cut-off between the first channel and the second channel by the rotary valve core are sequentially divided into four working positions, including: a first metering input position, a second intermittent stop position, a third metering output position, and a fourth intermittent stop position. The phase difference between each working position is 90°.

[0015] In some alternative embodiments of the present invention, the metering cylinder includes a metering cylinder body which is hollow inside and is in piston type fit with a piston body. The top of the metering cylinder body is open and is threadedly connected with a control knob. The control knob is in movable contact with the upper end face of the piston body of the piston body, and the displacement of the piston body is controlled by screw rotation to adjust the volume of the lower cavity.

[0016] In some alternative embodiments of the present invention, the bottom of the metering cylinder body is open and is threadedly connected with a metering cylinder head cover, which is convenient for the disassembly and assembly of the piston body.

[0017] In some alternative embodiments of the present invention, a convex portion protrudes on the surface of the metering cylinder head cover facing the piston body. The height of the convex portion is flush with the upper edge of the fourth channel, which is used to prevent the piston body from completely covering the fourth channel.

[0018] In some alternative embodiments of the present invention, the cross-sectional area of the upper end face of the piston body is larger than the cross-sectional area of the end face of the convex portion of the metering cylinder head cover.

[0019] In some alternative embodiments of the present invention, a hand-held handle is fixedly connected to one side of the filling valve block. An operation button is arranged on the hand-held handle, and the operation button is electrically connected to the stepper motor to control the start and stop of the stepper motor.

[0020] In some alternative embodiments of the present invention, it further includes a rechargeable battery disposed within the device, and the rechargeable battery is electrically connected to the stepper motor.

[0021] On the other hand, the present invention also provides a quantitative control method for a portable quantitative grease filling device. According to the portable quantitative grease filling device described in any one of the above, the method includes the following steps:

[0022] S1. Assemble the portable quantitative grease filling device and connect it to the oil supply device;

[0023] S2. Start the oil supply device to supply materials to the oil supply passage of the device. At the same time, start the stepper motor and control the rotation angle and speed of the motor through pulse number programming;

[0024] S3. Under the control of the feeding pressure and the rotating valve core, the piston body reciprocates within the quantitative cylinder to achieve quantitative input and output of the materials;

[0025] S4. Adjust the quantitative cylinder control knob to adjust the single output amount, and repeat the feeding and conveying steps to achieve adjustment of the quantitative output amount;

[0026] S5. Set four workstations with a phase difference of 90° each, and the stepper motor drives the valve core to rotate 90° in sequence to cyclically control the quantitative supply of the materials;

[0027] S6. Adjust the rotation speed of the stepper motor to match the input and output of the materials and the phase of the workstations, and repeat the workstation control steps to achieve continuous quantitative supply of the materials.

[0028] Further, the power control of the stepper motor is linked with the oil supply control of the oil supply device.

[0029] Compared with the prior art, the present invention discloses at least the following beneficial effects:

[0030] The present invention eliminates the pneumatic system and its pneumatic pipelines, has a simple structure, a small volume, a light weight, and reliable operation; different from the traditional pneumatic metering valve, the present invention does not rely on a high-pressure gas source and can achieve continuous quantitative filling of grease in specific occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is the front view of the portable quantitative grease filling device of the present invention;

[0033] Figure 2 Right view of the portable quantitative resin filling device of the present invention;

[0034] Figure 3 Perspective view of the portable quantitative resin filling device of the present invention;

[0035] Figure 4 Partial cross-sectional view of the portable quantitative resin filling device of the present invention;

[0036] Figure 5 Axonometric of the portable quantitative resin filling device of the present invention Figure 1 ;

[0037] Figure 6 Axonometric of the portable quantitative resin filling device of the present invention Figure 2 ;

[0038] Figure 7 Right view of the filling valve block in the device of the present invention;

[0039] Figure 8 is Figure 7 Cross-sectional view;

[0040] Figure 9 is Figure 7 Cross-sectional view at A-A in;

[0041] Figure 10 Axonometric view of the filling valve block in the device of the present invention;

[0042] Figure 11 Structural schematic of the rotating valve core in the device of the present invention Figure 1 ;

[0043] Figure 12 Structural schematic of the rotating valve core in the device of the present invention Figure 2 ;

[0044] Figure 13 Internal structure diagram of the metering cylinder in the device of the present invention.

[0045] Figure 14 State diagram of the device of the present invention at the first quantitative input station;

[0046] Figure 15 State diagram of the device of the present invention at the third quantitative output station;

[0047] Figure 16 State diagram of the device of the present invention at the second intermittent stop station and the fourth intermittent stop station. In the figure: 1. Stepper motor; 2. Filling valve block; 3. Rotating valve core; 4. Metering cylinder; 5. Nozzle;

[0048] 201. Valve block body; 202. Handheld handle; 203. Operation button; 204. Spool hole; 205. Oil supply passage; 206. Oil outlet passage; 207. First passage; 208. Second passage;

[0049] 301. Spool body; 302. First notch; 303. Annular passage; 304. Second notch; 305. Third notch; 306. Sector passage;

[0050] 401. Control knob; 402. Piston body; 403. Quantitative cylinder block; 404. Quantitative cylinder head; 405. Third passage; 406. Fourth passage; 407. Upper chamber; 408. Lower chamber; 409. Upper end face of piston body; 410. End face of convex part of quantitative cylinder head. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0053] Embodiment 1

[0054] Refer to Figures 1 to 6 As shown, Embodiment 1 of the present invention provides a portable quantitative grease filling device, including a stepping motor 1, a filling valve block 2, a rotating spool 3, a quantitative cylinder 4, and a nozzle 5. The stepping motor 1 and the filling valve block 2 are connected by bolts. The rotating spool 3 rotates in the spool hole 204 of the filling valve block 2, and has a clearance fit with the spool hole 204 of the filling valve block 2, and can freely rotate in the filling valve block 2. The output shaft of the stepping motor 1 is connected to the rotating spool 3 by a key connection or an interference connection, and can drive the rotating spool 3 to rotate. The rotation angle of the output shaft of the stepping motor 1 is controlled by the number of pulses, and then the rotation angle of the rotating spool 3 is controlled. The quantitative cylinder 4 is mechanically connected to the filling valve block 2, and its cylinder has an upper chamber 407 and a lower chamber 408. The communication between the two chambers and the inner cavity of the filling valve block 2 is controlled by the piston movement, so as to achieve the purpose of quantitatively adjusting the filling amount. The nozzle 5 is installed on the oil outlet passage 206 of the filling valve block 2 for outputting the material in the lower chamber 408 to the required position.

[0055] Specifically, as Figures 7 to 10As shown, the refueling valve block 2 includes a valve block body 201. A hand-held handle 202 is fixedly connected to one side of the valve block body 201 for easy handling. An operation button 203 is provided on the hand-held handle 202. The rotation of the stepping motor 1 can be controlled through the operation button 203. It should be understood that the operation button 203 is electrically connected to the stepping motor 1. By pressing the operation button 203, the power supply to the circuit of the stepping motor 1 can be turned on, thereby controlling the operation of the stepping motor 1.

[0056] As Figure 8 shown, a valve core hole 204 is provided inside the valve block body 201. The top of the valve core hole 204 is open for placing the rotating valve core 3. The bottom of the valve core hole 204 communicates with an oil outlet passage 206, and is conducted to the nozzle 5 through the oil outlet passage 206. In a specific embodiment, internal threads are provided in the oil outlet passage 206 for threadedly connecting the nozzle 5. An oil supply passage 205 is opened on one side of the valve block body 201, and the oil supply passage 205 communicates with the valve core hole 204. During use, the oil supply passage 205 is connected to the outlet of a dry oil gun or other oil supply, glue supply, or liquid supply device to achieve the input of oil or colloid, receive lubricating grease or gelatin from an oil source, and introduce it into the valve core hole 204 of the refueling valve block 2.

[0057] As Figure 7 and Figure 9 shown, two upper and lower holes are also opened on one side of the valve block body 201, namely a first hole 207 and a second hole 208. The first hole 207 and the second hole 208 communicate with the valve core hole 204. The first hole 207 and the second hole 208 are respectively communicated with two chambers (upper chamber 407 and lower chamber 408) of a metering cylinder 4 connected to one side of the valve block body 201, realizing the input and output of materials at different work positions, thereby completing the function of metering refueling.

[0058] As Figure 13 shown, the metering cylinder 4 includes a control knob 401, a piston body 402, a metering cylinder body 403, and a metering cylinder head 404. Among them, the inside of the metering cylinder body 403 is hollow, and a piston body 402 is provided in the inner cavity. The piston body 402 divides the inner cavity of the metering cylinder body 403 into an upper chamber 407 and a lower chamber 408. A third hole 405 and a fourth hole 406 that penetrate to the outside of the metering cylinder body 403 are respectively opened in the upper chamber 407 and the lower chamber 408. After the metering cylinder 4 is mechanically connected to the refueling valve block 2, the third hole 405 is connected to the first hole 207, and the fourth hole 406 is connected to the second hole 208. The control knob 401 is threadedly connected to the top opening of the metering cylinder body 403, and the metering cylinder head 404 is threadedly connected to the bottom opening.

[0059] In a specific embodiment, the piston of the metering cylinder 4 is placed inside the metering cylinder body 403, and the installation method is: after the piston body 402 is installed into the metering cylinder body 403, the upper cavity 407 is connected to the third channel 405, and the lower cavity 408 is connected to the fourth channel 406.

[0060] In a specific embodiment, the control knob 401 is connected to the metering cylinder body 403 through a thread, and the stroke of the piston body 402 can be controlled by rotating the control knob 401 to achieve the purpose of adjusting the amount of grease or gelatin added to the metering cylinder 4 in each stroke.

[0061] In a specific embodiment, the metering cylinder cover 404 is connected to the metering cylinder body 403 by a threaded form, which facilitates the disassembly of the piston body 402. At the same time, the metering cylinder cover 404 has a limiting function on the piston body 402 to prevent the piston body 402 from completely covering the fourth channel 406. Specifically, the end of the metering cylinder cover 404 entering the lower cavity 408 has an upward protrusion, and the height of the protrusion is basically level with the upper edge of the fourth channel 406, so that when the piston body 402 descends, it can only descend to a height where it contacts the protrusion, thereby ensuring the smooth flow of the fourth channel.

[0062] like Figure 11 and 12 As shown, the rotary valve core 3 is provided with grooves and bosses of different shapes, which control the connection and disconnection of each channel through the grooves and bosses. In a specific embodiment, the rotary valve core 3 includes a cylindrical valve core body 301, and the two end surfaces of the valve core body 301 have center holes for transmission cooperation with the stepper motor 1 and rotation cooperation with the filling valve block 2. The outer peripheral side of the valve core body 301 is symmetrically provided with a first notch 302 and a second notch 304 that are recessed inward along the radial direction. The valve core body 301 located above the first notch 302 and the second notch 304 is also recessed with an annular channel 303. The first notch 302 and the second notch 304 are connected by the annular channel 303. The annular channel 303 is used to connect the first notch 302 and the second notch 304 to ensure continuous flow of fluid during rotation. A third notch 305 is recessed inwardly on the circumference of the valve core body 301 below the first notch 302. The third notch 305 is not connected to the first notch 302. A fan-shaped channel 306 is also recessed on the valve core body 301 below the third notch 305. The fan-shaped channel 306 is specifically a semi-circular groove. At a specific rotation angle, it connects or cuts off adjacent channels for a short time to achieve precise flow segmentation control. Through rotation, it is found that the groove is aligned or misaligned with the fixed channel on the valve block body 201 to achieve fluid conduction or cutoff. A boss is formed on the wall of the valve core body 301 between two adjacent notches, which blocks the flow channel when misaligned to ensure the sealing of the closed state. Through the above structure, the rotating valve core 3 can efficiently achieve fluid connection, distribution and regulation.

[0063] From the above structure, it can be seen that the rotation of the rotary valve core 3 divides the connection and disconnection between the first channel 207 and the second channel 208 into four working positions in sequence, including: the first quantitative input position, the second intermittent stop position, the third quantitative output position, and the fourth intermittent stop position. The phase difference between each working position is 90°; the working phase of each working position is not a single-point phase. Each working position has its own working phase interval, and within this interval, the functions corresponding to the working positions can be realized.

[0064] As Figures 14 to 16 shown, the working principle of the portable quantitative grease filling device of the present invention is as follows:

[0065] The stepping motor 1 drives the rotary valve core 3 to rotate to Figure 14 the first quantitative input position shown and remains there. When the rotary valve core 3 is in this working position, under the combined action of the isolation of the boss on the rotary valve core 3 and the groove, the material in the oil supply channel 205 is simultaneously connected to the first channel 207 and the second channel 208 on the filling valve block 2. The first channel 207 is connected to the third channel 405, and the second channel 208 is connected to the fourth channel 406, which is equivalent to the oil supply channel 205 being simultaneously connected to the lower chamber 408 and the upper chamber 407. Since the cross-sectional area of the upper end surface 409 of the piston body is larger than the cross-sectional area of the end surface of the convex part of the quantitative cylinder head 410, the acting area of the grease or gelatin in the lower chamber 408 on the lower surface of the piston body 402 is larger than the acting area of the grease or gelatin in the upper chamber 407 on the upper surface of the piston body 402. Therefore, the upper chamber 407 and the lower chamber 408 are in a differential connection state, and the piston body 402 moves upward (upward in the figure) until the piston body 402 touches the limiting position of the control knob 401, achieving the purpose of inputting materials into the lower chamber 408.

[0066] The control knob 401 can rotate through threads to control the displacement of the piston body 402, which is equivalent to controlling the volume of the lower chamber 408, realizing the quantitative input of materials. At the same time, the control knob 401 can control the amount of material input in each stroke, realizing the function of adjustable quantification.

[0067] The stepping motor 1 drives the rotary valve core 3 to rotate to Figure 15The third quantitative output station shown is maintained. When the rotary valve core 3 is in this station, under the combined action of the isolation of the boss on the rotary valve core 3 and the groove, the material in the oil supply channel 205 is communicated with the first channel 207 on the filling valve block 2, and the oil supply channel 205 is isolated from the second channel 208. The first channel 207 is communicated with the third channel 405, which is equivalent to the oil supply channel 205 being communicated with the upper cavity 407, and the material can be flushed into the upper cavity 407. The second channel 208 is communicated with the fourth channel 406, and the second channel 208 is communicated with the channel of the nozzle 5, which is equivalent to the channel of the nozzle 5 being communicated with the lower cavity 408, and the lower cavity 408 can output the material outward through the nozzle channel. Under the pressure of the oil supply channel 205, the piston body 402 moves downward (in the direction shown in the figure), and the material in the lower cavity 408 is output to the required position through the nozzle 5, realizing the function of outward material output.

[0068] Since the volume of the material input into the lower cavity 408 is quantitative at the first quantitative input station, when at the third quantitative output station, the material output outward by the device through the nozzle channel is also quantitative, realizing the quantitative output function.

[0069] The stepping motor 1 drives the rotary valve core 3 to rotate to Figure 16 the second intermittent stop station shown and is maintained. When the rotary valve core 3 is in this station, under the isolation and blocking action of the boss on the rotary valve core 3, the oil supply channel 205 is not communicated with the channels on the filling valve block 2. At this time, due to the lack of the drive of the oil supply pressure, the device is in an intermittent stop state, without material input and without outward material output. During the process of the valve core rotating 360°, there are two intermittent stop stations. Rotating the valve core position of the second intermittent stop station by 180° is another intermittent stop station, that is, the fourth intermittent stop station.

[0070] It should be understood that in practical applications, the portable quantitative grease filling device of the present invention can be powered by a rechargeable battery installed in the device, can realize the function of quantitative oil discharging of a portable grease gun, and can also be powered by a cable to realize the end quantitative output of a non-portable oil supply device.

[0071] Embodiment 2

[0072] Embodiment 2 of the present invention also proposes a quantitative control method for a portable quantitative grease filling device, including the following steps:

[0073] Step S1: First, connect the stepping motor 1, the quantitative cylinder 4, the filling valve block 2, the rotary valve core 3, and the nozzle 5 in sequence, ensure good sealing and reliable transmission between each component, form a complete filling device, and connect it to the oil supply device;

[0074] Step S2: Start the manual grease gun or the oil supply device to supply materials to the oil supply passage 205 of the device. At the same time, start the stepper motor 1, and program the control of the stepper motor 1 by the number of pulses according to the resolution (minimum stepping angle) of the stepper motor 1 to control the rotation angle and rotation speed of the stepper motor 1. Among them, the power control of the stepper motor 1 can be linked with the oil supply control of the oil supply device, reducing the operation steps and improving the operation efficiency.

[0075] Step S3: Under the drive of the feeding pressure and the control of the rotating valve core 3, the piston body 402 reciprocates in the metering cylinder 4, thereby realizing the quantitative input and output of materials.

[0076] Step S4: Adjust the single output volume of the device by adjusting the control knob 401 on the metering cylinder 4. After the adjustment is completed, repeat the above feeding and motor starting steps and the material quantitative conveying steps to realize the flexible adjustment function of the quantitative output volume.

[0077] Step S5: Set the first quantitative input station, the second intermittent stop station, the third quantitative output station, and the fourth station, so that the phase differences of these four stations are each 90°. Drive the valve core to perform station control according to the following rotation sequence by the stepper motor 1: starting from the first quantitative input station, the stepper motor 1 rotates 90° to reach the second intermittent stop station, then rotates 90° to reach the third quantitative output station, continues to rotate 90° to reach the fourth station, and finally rotates 90° again to return to the first quantitative input station, and so on in a cycle to realize the quantitatively controllable supply of materials.

[0078] Step S6: Adjust the rotation speed of the stepper motor 1 according to the input and output conditions of the materials and the continuous phase segments of each station to make it match. Then repeat the above station control steps to realize the continuous rotation of the stepper motor 1 and the quantitatively controllable continuous supply of materials, meeting the filling requirements in different scenarios.

[0079] Compared with the prior art, the device and method of the present invention have at least the following beneficial effects:

[0080] The present invention cancels the pneumatic system and its pneumatic pipeline, has a simple structure, small volume, light weight and reliable operation; different from the traditional pneumatic metering valve, the present invention does not rely on a high-pressure gas source and can realize the continuous quantitative filling of grease in specific occasions.

[0081] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0082] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A portable quantitative resin filling device, characterized in that, Including: A filling valve block (2) with a valve core hole (204) opened in the center. The valve core hole (204) is communicated with an oil supply passage (205) and an oil outlet passage (206). On one side of the filling valve block (2), a first passage (207) and a second passage (208) that penetrate through to the valve core hole (204) are opened. A rotary valve core (3) rotates within the valve core hole (204) and is used to control the connection and disconnection of the internal passages of the filling valve block (2). Multiple grooves and protrusions are provided on the outer peripheral side of the rotary valve core (3), and the connection and disconnection of each passage are controlled through the grooves and protrusions. A metering cylinder (4) is fixedly connected to the filling valve block (2). A piston body (402) slides piston - type inside it. The piston body (402) divides the inner cavity of the metering cylinder (4) into an upper cavity (407) and a lower cavity (408). The upper cavity (407) is communicated with the first passage (207) through a third passage (405), and the lower cavity (408) is communicated with the second passage (208) through a fourth passage (406). A nozzle (5) is connected to the oil outlet passage (206) of the filling valve block (2). A stepping motor (1) is fixedly connected to the top of the filling valve block (2), and its output shaft is in transmission connection with the rotary valve core (3).

2. The portable quantitative resin filling device according to claim 1, wherein, On the outer peripheral side of the rotary valve core (3), a first notch (302) and a second notch (304) symmetrically and recess inward. Below the first notch (302), a third notch (305) recesses inward on the rotary valve core (3). Above the first notch (302) and the second notch (304), an annular passage (303) that penetrates through both is provided. Below the third notch (305), a sector - shaped passage (306) that is communicated with it is provided.

3. The portable quantitative resin filling device according to claim 2, characterized in that, The rotary valve core (3) divides the connection and disconnection between the first passage (207) and the second passage (208) into four working positions in sequence, including: a first metering input position, a second intermittent stop position, a third metering output position, and a fourth intermittent stop position. The phase difference between each working position is 90°.

4. The portable quantitative resin filling device according to claim 1, characterized in that The metering cylinder (4) includes a metering cylinder body (403) with a hollow interior. A piston body (402) is fitted piston - type inside it. The top of the metering cylinder body (403) is open and is thread - connected with a control knob (401). The control knob (401) is in movable contact with the upper end face (409) of the piston body of the piston body (402), and the displacement of the piston body (402) is controlled by screw rotation to adjust the volume of the lower cavity (408).

5. The portable quantitative grease filling device according to claim 4, characterized in that, The bottom of the metering cylinder body (403) is open and is thread - connected with a metering cylinder head (404), which is convenient for the disassembly and assembly of the piston body (402).

6. The portable quantitative resin filling device according to claim 5, characterized in that, On the side of the metering cylinder head (404) facing the piston body (402), a convex portion protrudes. The height of the convex portion is flush with the upper edge of the fourth passage (406) and is used to prevent the piston body (402) from completely covering the fourth passage (406).

7. The portable quantitative grease filling device according to claim 6, characterized in that, The cross - sectional area of the upper end face (409) of the piston body is larger than the cross - sectional area of the end face (410) of the convex portion of the metering cylinder head.

8. The portable quantitative resin filling device according to claim 1, characterized in that One side of the filling valve block (2) is fixedly connected with a hand-held handle (202). An operation button (203) is arranged on the hand-held handle (202). The operation button (203) is electrically connected to the stepping motor (1) and is used to control the start and stop of the stepping motor (1).

9. The portable quantitative resin filling device according to claim 1, wherein, It further includes a rechargeable battery arranged in the device. The rechargeable battery is electrically connected to the stepping motor (1).

10. A quantitative control method for a portable quantitative resin filling device according to any one of claims 1 to 9, characterized in that, It includes the following steps: S1. Assemble the portable quantitative grease filling device and connect it to the oil supply device; S2. Start the oil supply device to supply materials to the device oil supply channel (205). At the same time, start the stepping motor (1) and control the rotation angle and speed of the motor through pulse number programming; S3. Under the control of the feeding pressure and the rotating valve core (3), the piston body (402) reciprocates in the quantitative cylinder (4) to realize the quantitative input and output of materials; S4. Adjust the control knob (401) of the quantitative cylinder (4) to adjust the single output amount. Repeat the feeding and conveying steps to realize the adjustment of the quantitative output amount; S5. Set four stations with a phase difference of 90° each. The stepping motor (1) drives the valve core to rotate 90° in sequence to cyclically control the quantitative supply of materials; S6. Adjust the rotation speed of the stepping motor (1) to match the material input and output and the station phase. Repeat the station control steps to realize the quantitative continuous supply of materials.

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