Linear variable pump

Abstract

The utility model discloses a linear variable pump which comprises a bottom plate, a driving device, a transmission device and a liquid injection device, the driving device, the transmission device and the liquid injection device are all fixed on the bottom plate, the transmission device is arranged between the driving device and the liquid injection device, and the transmission device comprises a lead screw module and a universal joint. The liquid injection device comprises a piston rod, a liquid injection body, a liquid injection valve and a piston sleeve, the liquid injection body, the piston sleeve and the piston rod are combined to form a liquid injection cavity, the piston rod is movably arranged in the liquid injection cavity, the liquid injection valve is arranged at the upper end of the liquid injection body, and one end of the lead screw module is in transmission connection with the driving device. The universal joint is arranged at the other end of the lead screw module and fixedly connected with the piston rod. The driving device drives the lead screw module and the universal joint to move, so that the piston rod is driven to do telescopic movement in the liquid injection cavity, and then liquid outlet or liquid inlet of the liquid injection body is controlled. The liquid injection amount is convenient to adjust, the application range is wide, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of variable displacement pumps, in particular to a linear variable displacement pump. Background Art

[0002] At present, variable displacement pump is a kind of injection pump, which is mainly used in industries related to liquid filling. With the continuous development of industrial level, the use of injection pumps is increasing and the requirements are getting higher. However, the existing injection pumps mostly use manual adjustment to adjust the injection volume. This injection method not only has high requirements on operators, but also has low injection accuracy, low stability and reliability, and is prone to cause a lot of raw materials loss in injection volume. In addition, the labor intensity is high, the work efficiency is low, and the applicability and practicality are poor.

[0003] In the existing related technologies, the processing method of manually adjusting the injection amount not only has high requirements on the operator, but also has low injection accuracy, low stability and reliability, and easily causes a large amount of raw materials to be lost in the injection amount. In addition, the manual labor intensity is high, the work efficiency is low, and the applicability is poor. No effective solution has been proposed yet. Utility Model Content

[0004] In view of this, it is necessary to provide a linear variable pump to at least solve the problems in the related technology that the processing method of manually adjusting the injection amount not only has high requirements on the operator, but also has low injection accuracy, low stability and reliability, and easily causes a large amount of raw materials to be lost in the injection amount, and also has high labor intensity, low work efficiency and poor applicability.

[0005] A technical solution adopted by the utility model is as follows: a linear variable pump, comprising a base plate, a driving device, a transmission device and an injection device, wherein the driving device, the transmission device and the injection device are all fixed on the base plate, the transmission device is arranged between the driving device and the injection device, the transmission device comprises a screw module and a universal joint, the injection device comprises a piston rod, an injection body, an injection valve and a piston sleeve, the injection body, the piston sleeve and the piston rod are combined to form an injection chamber, the piston rod is movably arranged in the injection chamber, the injection valve is arranged at the upper end of the injection body, one end of the screw module is transmission-connected to the driving device, the universal joint is arranged on the other end of the screw module and fixedly connected to the piston rod; wherein, the driving device drives the screw module and the universal joint to move, thereby driving the piston rod to perform telescopic activities in the injection chamber, thereby controlling the liquid discharge or liquid inlet of the injection body.

[0006] In some embodiments, the screw module includes a transmission bearing, a bearing fixing plate, a screw, a screw nut, a slide rail, a slider and a screw nut seat, the bearing fixing plate and the slide rail are both fixed to the base plate, the transmission bearing is arranged on the bearing fixing plate, the screw can be rotatably arranged in the middle part of the transmission bearing, the screw nut is sleeved on the screw, the slider can be slidably arranged on the slide rail and fixed on the screw nut seat, one end of the universal joint is fixed on the screw nut seat, and the other end of the universal joint is transmission connected to the piston rod, one end of the screw module is transmission connected to the driving device, the other end of the screw module is fixedly connected to one end of the universal joint through the screw nut seat, and the other end of the universal joint is transmission connected to the piston rod; wherein, the driving device drives the screw to rotate on the transmission bearing, thereby driving the screw nut, the universal joint and the slider to slide on the slide rail, and then driving the piston rod to extend and retract in the injection chamber.

[0007] In some embodiments, a detection device is provided on the bearing fixing plate, and a sensing block adapted to the detection device is provided on the screw nut seat; wherein the detection device and the sensing block are used to detect the in-place status of the piston rod.

[0008] In some of the embodiments, the detection device is an infrared sensor.

[0009] In some embodiments, the driving device includes a driving member fixing plate, a driving member and a coupling, wherein the driving member fixing plate is fixed to the base plate and is located on one side of the bearing fixing plate, the driving member is fixed to the driving member fixing plate, and the coupling is arranged between the driving member and the screw rod; wherein the driving member drives the screw rod to rotate via the coupling.

[0010] In some embodiments, the driving member is a driving motor.

[0011] In some embodiments, a liquid inlet and a liquid outlet are provided on the injection body, and both the liquid inlet and the liquid outlet are indirectly connected to the injection chamber through an injection valve. A liquid inlet nozzle is provided at the liquid inlet, and a liquid outlet nozzle is provided at the liquid outlet; wherein, the liquid inlet nozzle is controlled to inlet liquid or the liquid outlet nozzle is controlled to discharge liquid by the piston rod.

[0012] In some embodiments, the piston sleeve is disposed in the injection body, and the piston sleeve is disposed on the piston rod.

[0013] In some embodiments, the liquid injection device further includes a liquid injection fixing plate, which is disposed on the bottom plate and located on the other side of the bearing fixing plate, and the liquid injection body is fixed on the liquid injection fixing plate.

[0014] In some embodiments, a wire outlet fixing plate is provided on the bottom plate, the wire outlet fixing plate is provided on the other side of the driving member fixing plate, a wire outlet is provided on the wire outlet fixing plate, and an anti-slip foot column is provided at the bottom of the bottom plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the embodiment of the present application provides a linear variable pump, which adopts a driving device to drive the transmission device to drive the injection device to inflate or discharge the liquid, replacing the manual adjustment of the injection device to inflate or discharge the liquid. The injection amount can be automatically adjusted by controlling the screw module and the universal joint of the transmission device through the driving device, thereby controlling the movement distance of the piston rod of the injection device. The injection amount is convenient to adjust, the injection accuracy is improved, the work efficiency is improved, the labor intensity is reduced, the difficulty of manual operation is reduced, the injection amount adjustment cost is reduced, the injection loss is reduced, the production and processing cost is reduced, the degree of automation is high, the processing needs of the liquid filling industry are met, the use range is wide, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the present application;

[0017] Figure 2 This is a perspective structural diagram of one of the embodiments of the present application;

[0018] Figure 3 is another perspective structural schematic diagram of an embodiment of the present application;

[0019] Figure 4 It is a cross-sectional view of an embodiment of the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0023] See also Figure 1-4 The embodiment of the present application provides a linear variable displacement pump, including a base plate 100, a driving device 200, a transmission device 300 and a liquid injection device 400, wherein the driving device 200, the transmission device 300 and the liquid injection device 400 are all fixed on the base plate 100, the transmission device 300 is arranged between the driving device 200 and the liquid injection device 400, the transmission device 300 includes a screw module 31 and a universal joint 32, the liquid injection device 400 includes a piston rod 41, a liquid injection body 42, a liquid injection valve 43 and a piston sleeve 44, the liquid injection body 42, The piston sleeve 44 and the piston rod 41 are combined to form an injection chamber 45, the piston rod 41 is movably arranged in the injection chamber 45, the injection valve 43 is arranged at the upper end of the injection body 42, one end of the screw module 31 is transmission-connected to the driving device 200, and the universal joint 32 is arranged on the other end of the screw module 31 and fixedly connected to the piston rod 41; wherein, the driving device 200 drives the screw module 31 and the universal joint 32 to move, thereby driving the piston rod 41 to perform telescopic activities in the injection chamber 45, thereby controlling the liquid discharge or liquid inlet of the injection body 42.

[0024] It should be noted that the driving device 200 drives the piston rod 41 to extend and retract in the injection chamber 45 by driving the screw module 31 and the universal joint 32 to move, thereby controlling the liquid outflow or inflow of the injection body 42. The injection volume can be precisely adjusted, and the adjustment of the injection volume is convenient, which improves the injection accuracy, improves the work efficiency, reduces the labor intensity, reduces the difficulty of manual operation, reduces the cost of adjusting the injection volume, reduces the injection loss, reduces the production and processing costs, has a high degree of automation, and meets the processing needs of the liquid filling industry.

[0025] In some optional embodiments, the screw module 31 includes a transmission bearing 311, a bearing fixing plate 312, a screw 313, a screw nut 314, a slide rail 315, a slider 316 and a screw nut seat 317, the bearing fixing plate 312 and the slide rail 315 are fixed on the base plate 100, the transmission bearing 311 is arranged on the bearing fixing plate 312, the screw 313 can be rotatably arranged in the middle of the transmission bearing 311, the screw nut 314 is sleeved on the screw 313, the slider 316 can be slidably arranged on the slide rail 315 and fixed to the screw nut seat 317, and one end of the universal joint 32 It is fixed on the screw nut seat 317, and the other end of the universal joint 32 is transmission connected to the piston rod 41. One end of the screw module 31 is transmission connected to the driving device 200. The other end of the screw module 31 is fixedly connected to one end of the universal joint 32 through the screw nut seat 317, and the other end of the universal joint 32 is transmission connected to the piston rod 41. The driving device 200 drives the screw 313 to rotate on the transmission bearing 311, thereby driving the screw nut 314, the universal joint 32 and the slider 316 to slide on the slide rail 315, thereby driving the piston rod 41 to extend and retract in the injection chamber 45.

[0026] It should be noted that the driving device 200 drives the screw 313 to rotate on the transmission bearing 311, thereby driving the screw nut 314, the screw nut seat 317, the universal joint 32 and the slider 316 to slide on the slide rail 315, thereby driving the piston rod 41 to extend and retract in the injection chamber 45. By adopting the structural design of the screw module 31, the accuracy of the present application is improved.

[0027] In some optional embodiments, a detection device 318 is provided on the bearing fixing plate 312, and a sensing block 319 adapted to the detection device 318 is provided on the screw nut seat 317; wherein the detection device 318 and the sensing block 319 are used to detect the in-place status of the piston rod 41.

[0028] In some of the optional embodiments, the detection device 318 is an infrared sensor.

[0029] It should be noted that the detection device 318 and the detection block 323 are used to detect the position of the piston rod 41, and the detection device 318 adopts an infrared sensor to achieve the precise liquid injection of the present application.

[0030] In some optional embodiments, the driving device 200 includes a driving member fixing plate 21, a driving member 22 and a coupling 23, the driving member fixing plate 21 is fixed on the base plate 100 and is located on one side of the bearing fixing plate 312, the driving member 22 is fixed on the driving member fixing plate 21, and the coupling 23 is arranged between the driving member 22 and the screw rod 313; wherein the driving member 22 drives the screw rod 313 to rotate through the coupling 23.

[0031] It should be noted that the driving member 22 drives the screw rod 313 to rotate through the coupling 23 .

[0032] Preferably, the driving member 22 is a driving motor.

[0033] In some optional embodiments, a liquid inlet and a liquid outlet are provided on the liquid injection body 42, and both the liquid inlet and the liquid outlet are indirectly connected to the liquid injection chamber 45 through the liquid injection valve 43. A liquid inlet nozzle 422 is provided at the liquid inlet, and a liquid outlet nozzle 423 is provided at the liquid outlet; wherein, the liquid inlet nozzle 422 or the liquid outlet nozzle 423 is controlled by the piston rod 41.

[0034] It should be noted that the piston rod 41 controls the liquid inlet nozzle 422 to inlet liquid or the liquid outlet nozzle 423 to discharge liquid. When the liquid injection volume is set and started, the external control system automatically calculates the movement stroke of the piston rod 41, and controls the drive member 22 (drive motor) to drive the screw nut 314 of the screw rod 313 to move to the left by the same stroke under the cooperation of the coupling 23 and the transmission bearing 311, thereby driving the piston rod 41 to move to the left by the same distance through the universal joint 32 and the screw rod 313. During the leftward movement, the liquid inlet (liquid inlet nozzle 422) is connected to the inside of the liquid injection chamber 421 through the liquid injection valve 43. As the volume formed by the injection chamber 421 and the piston rod 41 increases, the liquid flows from the liquid inlet (liquid inlet nozzle 422) through the injection valve 43 into the injection chamber 45 to achieve liquid suction; when the liquid suction is completed by moving to the left, the working state is switched through the injection valve 43, so that the inside of the injection chamber 45 is connected to the liquid outlet (liquid outlet nozzle 423), and the driving member 22 (driving motor) drives the piston rod 41 to return to the initial position through the screw module 31 and the universal joint 32, and the liquid sucked into the injection chamber 45 flows through the injection valve 43 and is discharged from the liquid outlet (liquid outlet nozzle 423), thereby achieving precise liquid inlet or liquid outlet functions.

[0035] In some optional implementations, the piston sleeve 44 is disposed in the injection body 42 , and the piston sleeve 44 is sleeved on the piston rod 41 .

[0036] It should be noted that a piston sleeve 44 is disposed inside the liquid injection body 42 , so that the sealing performance between the liquid injection body 42 and the piston rod 41 is better.

[0037] In some optional embodiments, the injection device 400 further includes an injection fixing plate 46 , which is disposed on the base plate 100 and located on the other side of the bearing fixing plate 312 , and the injection body 42 is fixed on the injection fixing plate 46 .

[0038] In some optional embodiments, a wire outlet fixing plate 11 is provided on the base plate 100 , and the wire outlet fixing plate 11 is arranged on the other side of the driving member fixing plate 21 . A wire outlet is provided on the wire outlet fixing plate 11 , and an anti-slip foot column 12 is provided at the bottom of the base plate 100 .

[0039] It should be noted that the use of the outlet fixing plate 11 and the outlet port to organize the lines makes the layout of the present application more reasonable and the wiring is orderly. The use of anti-slip feet 12 can increase the friction between the present application and the external workbench, making the work of the present application more stable.

[0040] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A linear variable displacement pump, characterized in that: The invention comprises a base plate (100), a driving device (200), a transmission device (300) and a liquid injection device (400), wherein the driving device (200), the transmission device (300) and the liquid injection device (400) are all fixed on the base plate (100), the transmission device (300) is arranged between the driving device (200) and the liquid injection device (400), the transmission device (300) comprises a screw module (31) and a universal joint (32), the liquid injection device (400) comprises a piston rod (41), a liquid injection body (42), a liquid injection valve (43) and a piston sleeve (44), and the liquid injection body (42), the piston sleeve (44) and the piston rod (41) are combined to form a liquid injection chamber (41). 5), the piston rod (41) is movably arranged in the injection chamber (45), the injection valve (43) is arranged at the upper end of the injection body (42), one end of the screw module (31) is transmission-connected to the driving device (200), and the universal joint (32) is arranged on the other end of the screw module (31) and fixedly connected to the piston rod (41); wherein the driving device (200) drives the screw module (31) and the universal joint (32) to move, thereby driving the piston rod (41) to perform telescopic movement in the injection chamber (45), thereby controlling the liquid discharge or liquid inlet of the injection body (42), wherein the screw module (31) includes a transmission bearing (311), a bearing fixing plate (311), and a bearing fixing plate (311). 2), a screw rod (313), a screw rod nut (314), a slide rail (315), a slider (316) and a screw rod nut seat (317), the bearing fixing plate (312) and the slide rail (315) are both fixed on the bottom plate (100), the transmission bearing (311) is arranged on the bearing fixing plate (312), the screw rod (313) is rotatably arranged in the middle of the transmission bearing (311), the screw rod nut (314) is sleeved on the screw rod (313) and fixed on the screw rod nut seat (317), the slider (316) is slidably arranged on the slide rail (315), one end of the universal joint (32) is fixed on the screw rod nut seat (317), and the universal joint (32) is transmission-connected to the piston rod (41), one end of the screw module (31) is transmission-connected to the driving device (200), the other end of the screw module (31) is fixedly connected to one end of the universal joint (32) via a screw nut seat (317), and the other end of the universal joint (32) is transmission-connected to the piston rod (41); wherein the driving device (200) drives the screw (313) to rotate on the transmission bearing (311), thereby driving the screw nut (314), the universal joint (32) and the slider (316) to slide on the slide rail (315), thereby driving the piston rod (41) to extend and retract in the injection chamber (45).

2. The linear variable displacement pump according to claim 1, characterized in that: The bearing fixing plate (312) is provided with a detection device (318), and the screw nut seat (317) is provided with a sensing block (319) adapted to the detection device (318); wherein the detection device (318) and the sensing block (319) are used to detect the in-place status of the piston rod (41).

3. The linear variable displacement pump according to claim 2, characterized in that: The detection device (318) is an infrared sensor.

4. The linear variable displacement pump according to claim 1, characterized in that: The driving device (200) comprises a driving member fixing plate (21), a driving member (22) and a coupling (23); the driving member fixing plate (21) is fixed on the base plate (100) and is located on one side of the bearing fixing plate (312); the driving member (22) is fixed on the driving member fixing plate (21); and the coupling (23) is arranged between the driving member (22) and the screw rod (313); wherein the driving member (22) drives the screw rod (313) to rotate via the coupling (23).

5. The linear variable displacement pump according to claim 4, characterized in that: The driving component (22) is a driving motor.

6. The linear variable displacement pump according to claim 1, characterized in that: The liquid injection body (42) is provided with a liquid inlet and a liquid outlet, and both the liquid inlet and the liquid outlet are indirectly connected to the liquid injection chamber (45) via a liquid injection valve (43). The liquid inlet is provided with a liquid inlet nozzle (422), and the liquid outlet is provided with a liquid outlet nozzle (423); wherein the liquid inlet nozzle (422) is controlled to inlet liquid or the liquid outlet nozzle (423) is controlled to discharge liquid via the piston rod (41).

7. The linear variable displacement pump according to claim 1, characterized in that: The piston sleeve (44) is disposed in the liquid injection body (42), and the piston sleeve (44) is sleeved on the piston rod (41).

8. The linear variable displacement pump according to claim 1, characterized in that: The liquid injection device (400) further comprises a liquid injection fixing plate (46), wherein the liquid injection fixing plate (46) is arranged on the bottom plate (100) and is located on the other side of the bearing fixing plate (312), and the liquid injection body (42) is fixed on the liquid injection fixing plate (46).

9. The linear variable displacement pump according to claim 4, characterized in that: The bottom plate (100) is provided with a wire outlet fixing plate (11), the wire outlet fixing plate (11) is arranged on the other side of the driving member fixing plate (21), the wire outlet fixing plate (11) is provided with a wire outlet, and the bottom of the bottom plate (100) is provided with an anti-slip foot column (12).

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