Pump body drive device

Abstract

The present application relates to a kind of pump body driving device, including press discharge mechanism with several discharge port connecting rods, pump body connecting mechanism with several piston assemblies, variable speed transmission mechanism comprising speed regulating assembly, at least one the piston assembly is connected with corresponding discharge port connecting rod by corresponding speed regulating assembly, the different moving stroke corresponding to each piston assembly is completed movement in the same time by the speed regulating assembly between corresponding discharge port connecting rod and piston assembly.This pump body driving device is provided with variable speed transmission mechanism, effectively guarantee that after press press discharge mechanism, each piston assembly moves by corresponding speed regulating assembly according to preset proportion, so that the different moving stroke corresponding to each piston assembly is completed movement in the same time, i.e.it guarantees the consistency of discharge proportion, also facilitate user operation, also guarantee comfortable operation hand feeling, effectively optimize user's use experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical technical field, in particular to the packaging bottle technical field, and more particularly to a pump body driving device. BACKGROUND

[0002] Some materials often need to be mixed in real time to obtain the desired effect (such as many products in the field of cosmetics and skin care products, which need to mix different components of the material in real time for use to achieve the desired effect).

[0003] In order to facilitate the consumer to carry and prompt the consumer to use, the prior art usually separates and stores multiple materials in the same packaging bottle for the user to use. For materials with the same ratio, only two pumps with the same stroke need to be installed in the two cavities, and the two pump heads are connected together through a connecting device to realize simultaneous material output, which is relatively convenient to operate. However, for materials with different ratios, it is not very convenient to use, and some packaging bottles usually use two pump heads to pump out two cavities separated in the same packaging bottle, which is very inconvenient to operate. In addition, the proportion of the materials depends on the control of the operator, and the accuracy cannot be guaranteed. The proportion of the mixed materials is inconsistent with the expectation, which affects the use effect of the materials.

[0004] In order to improve the above problems, the prior art designs a structure in which pumps with different strokes are placed in two cavities, and a connecting piece is used to connect the two pumps. The two pumps can be driven to work simultaneously through the connecting piece to facilitate user operation. Since the strokes of the pumps in the different cavities are different, the prior art usually increases an idle stroke in the pressing process of the shorter stroke to meet the needs of the ratio. However, in this scheme of increasing the idle stroke, the supporting force on one side of the idle stroke is weak when the pressing is just started, the pressing part is unevenly stressed, the consumer's pressing experience is poor, and the pressing part is easy to turn over. The use experience and functionality of the product are not good, and the user needs to press the entire stroke every time to realize consistent ratio, and if the user does not press the entire stroke, the desired ratio may still not be met. SUMMARY

[0005] In view of the above defects of the prior art, the present application provides a pump body driving device which is convenient to use, can effectively guarantee that the output ratio meets the needs, and is good in practicality.

[0006] In order to achieve the above purpose, the pump body driving device of the present application has the following structure:

[0007] The pump body driving device mainly comprises:

[0008] The pressing discharging mechanism comprises at least two discharging ports and a plurality of discharging port connecting rods corresponding to the discharging ports, each of the discharging port connecting rods is provided with a first channel, and the first channel in each of the discharging port connecting rods is communicated with the corresponding discharging port;

[0009] The pump body connecting mechanism comprises a plurality of piston assemblies corresponding to the discharging ports, each of the piston assemblies is provided with a second channel, and the second channel in each of the piston assemblies is communicated with the first channel in the corresponding discharging port connecting rod;

[0010] The variable speed transmission mechanism comprises at least one speed regulating assembly;

[0011] At least one of the piston assemblies is connected with the corresponding discharging port connecting rod through the corresponding speed regulating assembly, and the different moving strokes corresponding to each of the piston assemblies are completed in the same time through the speed regulating assembly arranged between the corresponding discharging port connecting rod and the piston assembly;

[0012] The piston assembly connected with the corresponding discharging port connecting rod through the corresponding speed regulating assembly is a first piston assembly.

[0013] The pump body driving device, wherein the speed regulating assembly comprises:

[0014] A pushing member is arranged on the pressing discharging mechanism, and the pushing member is sleeved on the periphery of the discharging port connecting rod connected with the speed regulating assembly;

[0015] A screw transmission member;

[0016] A pushing member is arranged on the pressing discharging mechanism, and the pushing member is sleeved on the periphery of the discharging port connecting rod connected with the speed regulating assembly;

[0017] The screw transmission member rotates spirally under the linear pushing force of the pushing member, and the screw transmission member drives the pushing member to move along the moving direction of the pushing member when the screw transmission member rotates,

[0018] The pushing member drives the corresponding first piston assembly to move under the driving of the screw transmission member;

[0019] The reduction ratio of the speed regulating assembly is determined by the ratio between the thread lead of the input side and the thread lead of the output side of each screw transmission member.

[0020] The screw transmission member and the pushing member are coaxially arranged, the screw transmission member is sleeved on the outside of the pushing member, and the pushing member is arranged in the gap between the screw transmission member and the pushing member.

[0021] The pushing member is connected with the screw transmission member through a connecting piece, and the pushing member is connected with the corresponding first piston assembly through a piston limiting piece.

[0022] The first screw assembly is arranged between the pushing member and the screw transmission member, and the pushing member and the screw transmission member are screw transmission through the first screw assembly, and the lead of the first screw assembly constitutes the thread lead of the input side of the screw transmission member.

[0023] The pump body driving device, wherein the screw transmission member is arranged on the inner side of the pushing member, the first screw assembly is arranged between the pushing member and the screw transmission member, and the pushing member and the screw transmission member are screw transmission through the first screw assembly, and the lead of the first screw assembly constitutes the thread lead of the input side of the screw transmission member.

[0024] The pushing member is arranged on the inner wall of the screw transmission member, and the piston limiting piece and the corresponding first piston assembly are connected by the pushing member.

[0025] The pump body driving device, wherein the first screw assembly comprises a first output screw surface arranged on one side of the pushing member towards the screw transmission member and a first input screw surface arranged on one side of the screw transmission member towards the pushing member, and the first output screw surface and the first input screw surface are matched and slidably nested together.

[0026] The pump body driving device, wherein the pump body driving device further comprises:

[0027] The tank connecting mechanism comprises a plurality of piston moving cavities corresponding to the discharge ports.

[0028] Each of the piston assemblies is moved in the corresponding piston moving cavity under the driving of the corresponding discharge port connecting rod or speed regulating assembly.

[0029] The pump body driving device, wherein the upper side of the piston moving cavity in which each of the first piston assemblies is arranged is provided with an output screw sleeve, each of the screw transmission members is connected with the corresponding output screw sleeve, a second screw assembly is arranged between the screw transmission member and the output screw sleeve, the screw transmission member and the output screw sleeve are screw transmission through the second screw assembly, and the lead of the second screw assembly constitutes the thread lead of the output side of the screw transmission member.

[0030] The pump body driving device, wherein the screw transmission member is arranged on the inner side of the corresponding output screw sleeve, or the screw transmission member is arranged on the outer side of the corresponding output screw sleeve.

[0031] The pump body driving device, wherein the second screw assembly comprises output screw grooves arranged on one side of the screw transmission member towards the output screw sleeve and screw ribs arranged on one side of the output screw sleeve towards the screw transmission member, and the screw ribs are slidably arranged in the screw grooves.

[0032] The second screw assembly comprises screw ribs arranged on one side of the screw transmission member towards the output screw sleeve and output screw grooves arranged on one side of the output screw sleeve towards the screw transmission member, and the screw ribs are slidably arranged in the screw grooves.

[0033] The pump body driving device, wherein when the pump body connecting mechanism comprises at least one piston assembly not connected with the corresponding discharge port connecting rod through the speed regulating assembly, the piston assembly not connected with the corresponding discharge port connecting rod through the speed regulating assembly constitutes a second piston assembly.

[0034] The second piston assembly comprises a second piston and a second piston rod, a second channel in the second piston assembly passes through the second piston and the second piston rod, one end of the second piston rod is connected with the second piston, and the other end of the second piston rod is connected with the corresponding discharge port connecting rod.

[0035] The pump body driving device, wherein the pump body driving device further comprises:

[0036] The elastic reset mechanism comprises a plurality of elastic reset assemblies corresponding to the discharge ports, each elastic reset assembly is arranged between the corresponding piston assembly and the piston moving cavity to drive the piston assembly to reset relative to the piston moving cavity when there is no external driving force.

[0037] The pump body driving device, wherein the pump body driving device further comprises:

[0038] The guide mechanism is arranged between the tank body connecting mechanism and the pressing discharging mechanism, and the guide mechanism defines the relative displacement direction between the tank body connecting mechanism and the pressing discharging mechanism.

[0039] The pump body driving device has the following beneficial effects:

[0040] The pump body driving device is provided with a variable speed transmission mechanism, which effectively ensures that after the pressing discharging mechanism is pressed, each piston assembly moves at a preset ratio by using the corresponding speed regulating assembly, so that the different movement strokes of each piston assembly are completed in the same time, that is, the consistency of the discharging ratio is ensured, which is convenient for user operation and also ensures a comfortable operation feeling, thereby effectively optimizing the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0041] The concept, specific structure and technical effects of the present application will be further described in combination with the drawings, so as to fully understand the purpose, features and effects of the present application.

[0042] Figure 1 A sectional view of the pump body driving device of the present application in the first embodiment in a first state.

[0043] Figure 2 A sectional view of the pump body driving device of the present application in the first embodiment in a second state. Figure 1 A local enlarged view of the screw transmission member in the first embodiment.

[0044] Figure 3 A sectional view of the pump body driving device of the present application in the first embodiment in a first state.

[0045] Figure 4 A structural schematic view of the pressing discharging mechanism in the first embodiment.

[0046] Figure 5 A structural schematic view of the speed reduction pushing mechanism in the first embodiment.

[0047] Figure 6 A structural schematic view of the first piston assembly in the first embodiment.

[0048] Figure 7A A structural schematic view of the second piston assembly in the first embodiment.

[0049] Figure 7B A structural schematic view of the second piston assembly in the first embodiment. Figure 7A A bottom view structural schematic view of the second piston assembly in the first embodiment.

[0050] Figure 8 A structural schematic view of the tank body connecting mechanism in the first embodiment.

[0051] Figure 9 A sectional view of the pump body driving device of the present application in the first embodiment in a first state.

[0052] Figure 10 A structural schematic view of the screw transmission member in the fourth embodiment.

[0053] Figure 11 A structural schematic view of the tank body connecting mechanism in the fourth embodiment.

[0054] Reference signs

[0055] 1 pressing discharging mechanism

[0056] 111 first discharging port

[0057] 112 second discharging port

[0058] 121 first discharge port connecting rod

[0059] 122 second discharge port connecting rod

[0060] 2 first piston assembly

[0061] 21 first piston

[0062] 22 first piston rod

[0063] 23 speed regulating assembly connecting part

[0064] 24 return spring blocking ring

[0065] 3 second piston assembly

[0066] 31 second piston

[0067] 32 second piston rod

[0068] 33 connecting rib

[0069] 34 return spring hole

[0070] 4 speed regulating assembly

[0071] 41 pushing member

[0072] 42 helical transmission member

[0073] 421 shaft shoulder structure

[0074] 43 pushing member

[0075] 44 connecting piece

[0076] 45 piston limiting piece

[0077] 461 first output helical surface

[0078] 462 first input helical surface

[0079] 471 helical groove

[0080] 472 helical rib

[0081] 5 tank body connecting mechanism

[0082] 51 first piston moving cavity

[0083] 52 second piston moving cavity

[0084] 53 output helical sleeve

[0085] 54 concentric mounting sleeve

[0086] 61 first spring

[0087] 62 second spring

[0088] 71 guide rib

[0089] 72 guide groove

[0090] 8 one-way valve

[0091] 9 shunt groove DETAILED DESCRIPTION

[0092] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the application is further described below in combination with specific drawings. However, the application is not limited to the following embodiments.

[0093] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the application, should still fall within the scope of the technical content disclosed by the application.

[0094] In implementation, the pump body driving device comprises:

[0095] The pressing discharging mechanism comprises at least two discharging ports and a plurality of discharging port connecting rods corresponding to the discharging ports, each of the discharging port connecting rods is provided with a first channel, and the first channel in each of the discharging port connecting rods is in communication with the corresponding discharging port;

[0096] The pump body connecting mechanism comprises a plurality of piston assemblies corresponding to the discharging ports, each of the piston assemblies is provided with a second channel, and the second channel in each of the piston assemblies is in communication with the first channel in the corresponding discharging port connecting rod;

[0097] The variable speed transmission mechanism comprises at least one speed adjusting assembly;

[0098] At least one of the piston assemblies is connected to the corresponding discharging port connecting rod through the corresponding speed adjusting assembly, and the different movement strokes corresponding to each of the piston assemblies are completed in the same time through the speed adjusting assembly arranged between the corresponding discharging port connecting rod and the piston assembly;

[0099] Among them, the piston assembly connected to the corresponding discharging port connecting rod through the corresponding speed adjusting assembly constitutes a first piston assembly.

[0100] In this embodiment, the speed adjusting assembly comprises:

[0101] A pushing member is arranged on the pressing discharging mechanism, and the pushing member is sleeved on the outer periphery of the discharging port connecting rod connected with the speed regulating assembly;

[0102] A screw transmission member;

[0103] A pushing member is connected with the screw transmission member;

[0104] The screw transmission member rotates spirally under the linear pushing force of the pushing member, and the screw transmission member drives the pushing member to move along the moving direction of the pushing member when the screw transmission member rotates, and the pushing member drives the corresponding first piston assembly to move under the driving of the screw transmission member;

[0105] The reduction ratio of the speed regulating assembly is determined by the ratio between the thread lead of the input side and the output side of each screw transmission member, wherein the input side of the screw transmission member is connected with the pressing discharging mechanism, and the output side of the screw transmission member is connected with the cavity in which the corresponding piston assembly is arranged, that is, in actual design, the ratio between the thread lead of the input side and the output side of the corresponding screw transmission member can be designed according to the required reduction ratio to meet the corresponding requirements.

[0106] In this embodiment, the screw transmission member is coaxially arranged with the pushing member, and the screw transmission member is sleeved on the outside of the pushing member, and the pushing member is arranged in the gap between the screw transmission member and the pushing member;

[0107] The pushing member is connected with the screw transmission member through a connecting piece, and the pushing member is connected with the corresponding first piston assembly through a piston limiting piece;

[0108] A first screw assembly is arranged between the pushing member and the screw transmission member, and the pushing member and the screw transmission member are screw driven through the first screw assembly, and the thread lead of the input side of the screw transmission member is composed of the lead of the first screw assembly.

[0109] In other embodiments, the screw transmission member is sleeved on the inside of the pushing member, a first screw assembly is arranged between the pushing member and the screw transmission member, and the pushing member and the screw transmission member are screw driven through the first screw assembly, and the thread lead of the input side of the screw transmission member is composed of the lead of the first screw assembly;

[0110] The pushing member is arranged on the inner wall of the screw transmission member, and the piston limiting piece is connected with the corresponding first piston assembly by the pushing member.

[0111] In this embodiment, the first screw assembly comprises a first output screw surface arranged on one side of the pushing member facing the screw transmission member and a first input screw surface arranged on one side of the screw transmission member facing the pushing member, the first output screw surface and the first input screw surface are matched and slidably nested together.

[0112] In this embodiment, the pump body driving device further comprises:

[0113] The tank body connecting mechanism 5 comprises a plurality of piston moving cavities corresponding to the discharge ports;

[0114] Each of the piston assemblies is moved in the corresponding piston moving cavity under the driving of the corresponding discharge port connecting rod or speed regulating assembly.

[0115] In this embodiment, an output screw sleeve is arranged above the piston moving cavity where each of the first piston assemblies is located, each of the screw transmission members is connected to the corresponding output screw sleeve, and a second screw assembly is arranged between the screw transmission member and the output screw sleeve, the screw transmission member and the output screw sleeve are screw driven through the second screw assembly, and the lead of the second screw assembly constitutes the thread lead of the output side of the screw transmission member.

[0116] In specific implementation, the screw transmission member can be arranged inside the corresponding output screw sleeve, or the screw transmission member can be arranged outside the corresponding output screw sleeve.

[0117] In this embodiment, the second screw assembly comprises an output screw groove arranged on one side of the screw transmission member facing the output screw sleeve and a screw rib arranged on one side of the output screw sleeve facing the screw transmission member, the screw rib is slidably arranged in the screw groove.

[0118] In other embodiments, the second screw assembly comprises a screw rib arranged on one side of the screw transmission member facing the output screw sleeve and an output screw groove arranged on one side of the output screw sleeve facing the screw transmission member, the screw rib is slidably arranged in the screw groove.

[0119] In this embodiment, when the pump body connecting mechanism comprises at least one piston assembly that is not connected to the corresponding discharge port connecting rod through the speed regulating assembly, the at least one piston assembly that is not connected to the corresponding discharge port connecting rod through the speed regulating assembly constitutes a second piston assembly.

[0120] The second piston assembly comprises a second piston and a second piston rod, a second channel in the second piston assembly runs through the second piston and the second piston rod, one end of the second piston rod is connected with the second piston, and the other end of the second piston rod is connected with the corresponding outlet port connecting rod.

[0121] In implementation, the thread lead of the input side of the screw transmission member is constituted by the thread lead of the first screw assembly, and the thread lead of the output side of the screw transmission member is constituted by the thread lead of the second screw assembly.

[0122] In this embodiment, the pump body driving device further comprises:

[0123] The elastic reset mechanism comprises a plurality of elastic reset assemblies corresponding to the outlet ports, and each elastic reset assembly is arranged between the corresponding piston assembly and the piston moving cavity to drive the piston assembly to reset relative to the piston moving cavity when no external force is applied.

[0124] In this embodiment, the pump body driving device further comprises:

[0125] The guide mechanism is arranged between the tank body connecting mechanism 5 and the pressing and discharging mechanism, and the guide mechanism defines the relative displacement direction between the tank body connecting mechanism 5 and the pressing and discharging mechanism.

[0126] The pump body driving device in the above embodiments is a linear motion pumping device with simple structure, easy installation, easy quantitative production, low cost and good consumer experience. The mechanism can keep the pumping devices with different output strokes synchronized by adjusting the output speed of part of the outlet ports, realize synchronous pumping, and effectively ensure that the discharging proportions of different outlet ports meet the preset requirements.

[0127] The pump body driving device in the above embodiments has the following characteristics when in use:

[0128] 1. The pressing and discharging mechanism can be directly connected with the piston assembly with the longest stroke or connected with the corresponding piston assembly through a speed regulating assembly. However, when there is a piston assembly directly connected with the pressing and discharging mechanism, the pressing and discharging mechanism needs to be connected with the piston assembly directly connected with the corresponding outlet port connecting rod.

[0129] 2. Other piston assemblies with shorter strokes than those directly connected to the pressing and discharging mechanism can be connected to the pressing and discharging mechanism through a speed regulating component. The speed regulating component can be used to achieve synchronous output of each piston assembly. Specifically, the helical rotation of the helical transmission component is used at the piston assembly with a shorter stroke to convert the helical rotation provided by the helical transmission component into the linear motion of the pushing component and transmit it to the corresponding piston assembly, thereby realizing helical output with different leads. That is, the corresponding output is decomposed into linear and rotational components, and the linear output part is used to achieve linear deceleration.

[0130] 3. The stroke of the linear motion component decomposed from the relative motion of the pressing and discharging mechanism and the speed regulating component connected to the corresponding first piston assembly is equal to the stroke difference between the pressing and discharging mechanism and the first piston assembly. During the process, the first piston assembly and the corresponding speed regulating component only have the relative rotational motion and the rotational motion component decomposed from the spiral motion.

[0131] 4. The required thread lead ratio of the input and output sides of the screw drive component can be set by the stroke difference between each piston assembly and the ratio of the effective output stroke.

[0132] First embodiment:

[0133] To facilitate understanding, the following will be combined with... Figures 1 to 8 To further illustrate the structure and working principle of the pump drive device in the above embodiments, a specific example will be provided:

[0134] like Figures 1 to 8 As shown (the uniformly distributed diagonal lines in the figure are cross-sectional lines), the pump drive device in this embodiment includes:

[0135] The pressing and discharging mechanism 1 includes two discharge ports (i.e., the first discharge port 111 and the second discharge port 112) and two discharge port connecting rods (i.e., the first discharge port connecting rod 121 and the second discharge port connecting rod 122). Each of the two discharge port connecting rods is provided with a corresponding first channel, and the first channel in each discharge port connecting rod is connected to the corresponding discharge port.

[0136] The pump body connection mechanism includes two piston assemblies (i.e., the first piston assembly 2 and the second piston assembly 3), each of the piston assemblies is provided with a second channel, and the second channel in each piston assembly is connected to the first channel in the corresponding discharge port connecting rod;

[0137] The transmission mechanism includes a speed regulating component 4;

[0138] The tank connection mechanism 5 includes two piston moving chambers (i.e., the first piston moving chamber 51 and the second piston moving chamber 52);

[0139] The first piston assembly 2 is connected with the first discharge port connecting rod 121 through the speed regulating assembly 4, and the second piston assembly 3 is directly connected with the second discharge port connecting rod 122.

[0140] The first discharge port connecting rod 121 drives the first piston assembly 2 to move in the first piston moving cavity 51 through the speed regulating assembly 4, and the second discharge port connecting rod 122 drives the second piston assembly 3 to move in the second piston moving cavity 52.

[0141] The elastic reset mechanism includes two elastic reset assemblies, i.e., a first spring 61 and a second spring 62, and other elastic reset mechanisms can also be used to form the elastic reset assembly in other embodiments. The first spring 61 is arranged between the first piston assembly 2 and the first piston moving cavity 51, and the second spring 62 is arranged between the second piston assembly 3 and the second piston moving cavity 52, so as to drive the piston assembly to reset relative to the piston moving cavity when there is no external force driving.

[0142] The guide mechanism is arranged between the tank connecting mechanism 5 and the pressing discharge mechanism 1, and the relative displacement direction between the tank connecting mechanism 5 and the pressing discharge mechanism 1 is defined by the guide mechanism.

[0143] Figure 1 is a sectional view of the pump body driving device of the present application in the first state in an embodiment, Figure 3 is a sectional view of the pump body driving device of the present application in the second state in an embodiment, wherein, Figure 1 is a sectional view of the pump body driving device in the state of no external force intervention, Figure 3 is a sectional view of the pressing discharge mechanism 1 of the pump body driving device after being pressed down. As can be seen by comparison, the moving stroke of the first piston assembly 2 is shorter than that of the second piston assembly 3, but due to the arrangement of the speed regulating assembly 4, the different moving strokes of the two piston assemblies can be completed in the same time. In other embodiments, the two piston assemblies can also be connected with corresponding discharge port connecting rods through corresponding speed regulating assemblies 4, and then the speed regulating ratios of the two speed regulating assemblies 4 (the specific speed regulation can be set according to actual needs) are set, so that the different moving strokes of the two piston assemblies can be completed in the same time.

[0144] In this embodiment, the speed regulating assembly 4 includes:

[0145] The pushing member 41 is arranged on the pressing discharge mechanism 1, and the pushing member 41 is sleeved on the periphery of the discharge port connecting rod connected with the speed regulating assembly 4, as shown in the drawing. The pushing member 41 is in a cylindrical shape, and is coaxially arranged with the first discharge port connecting rod 121. Figure 4

[0146] ​screw transmission member 42;

[0147] pushing member 43 connected with the screw transmission member 42;

[0148] The screw transmission member 42 is coaxially arranged with the pushing member 43, and the screw transmission member 42 is sleeved outside the pushing member 43. The pushing member 41 is arranged in the gap between the screw transmission member 42 and the pushing member 43.

[0149] The pushing member 43 is connected with the screw transmission member 42 through a connecting member 44, and the pushing member 43 is connected with the corresponding first piston assembly 2 through a piston limiting member 45 to drive the first piston assembly 2 to move.

[0150] A first screw assembly is arranged between the pushing member 41 and the screw transmission member 42, and the pushing member 41 and the screw transmission member 42 are screw-transmitted through the first screw assembly.

[0151] As shown in Figure 4 and Figure 5 The first screw assembly includes a first output screw surface 461 arranged on one side of the pushing member 41 facing the screw transmission member 42 and a first input screw surface 462 arranged on one side of the screw transmission member 42 facing the pushing member 41. The first output screw surface 461 and the first input screw surface 462 are matched with each other and are slidably nested together. In other embodiments, the first screw assembly can also be composed of other forms of screw transmission structures.

[0152] An output screw sleeve 53 is arranged above the first piston moving cavity 51 in which the first piston assembly 2 is arranged. The screw transmission member 42 is arranged in the corresponding output screw sleeve 53, and a second screw assembly is arranged between the screw transmission member 42 and the output screw sleeve 53. The screw transmission member 42 and the output screw sleeve 53 are screw-transmitted through the second screw assembly.

[0153] The second screw assembly includes an output screw groove 471 arranged on one side of the screw transmission member 42 facing the output screw sleeve 53 and a screw rib 472 arranged on one side of the output screw sleeve 53 facing the screw transmission member 42. The screw rib 472 is slidably arranged in the screw groove 471. In other embodiments, the second screw assembly can also be composed of other forms of screw transmission structures.

[0154] A concentric mounting sleeve 54 is arranged above the second piston moving cavity 52 in which the second piston assembly 3 is arranged. The second piston assembly 3 passes through the concentric mounting sleeve 54.

[0155] In the implementation, the output screw sleeve 53 and the concentric mounting sleeve 54 are used to limit the first piston assembly 2 and the second piston assembly 3, respectively.

[0156] As shown in Figure 1 and Figure 5 In this embodiment, the screw transmission member 42, the pushing member 43, the connecting member 44 and the piston limiting member 45 are formed as an integral assembly. The screw transmission member 42 is provided with a first input screw surface 462 on the side facing the pushing member 41. The first input screw surface 462 is used in cooperation with a first output screw surface 461 provided on the side of the pushing member 41 facing the screw transmission member 42. The screw transmission member 42 is provided with an output screw groove 471 on the side facing the output screw sleeve 53. The output screw groove 471 is used in cooperation with a screw rib 472 provided on the side of the output screw sleeve 53 facing the screw transmission member 42. The screw transmission member 42 is provided with an output screw groove 471 on the side facing the output screw sleeve 53. The output screw groove 471 is used in cooperation with a screw rib 472 provided on the side of the output screw sleeve 53 facing the screw transmission member 42.

[0157] The screw transmission member 42 is rotated spirally under the linear pushing force of the pushing member 41. When the screw transmission member 42 is rotated, the pushing member 43 is moved along the moving direction of the pushing member 41,

[0158] The pushing member 43 drives the first piston assembly 2 to move under the driving of the screw transmission member 42. The screw transmission member 42 converts the linear downward pushing force of the pushing member 41 into a spiral downward pushing force, so that the moving stroke of the first piston assembly 2 is shorter than the moving stroke of the second piston assembly 3 under the condition that the first discharge port connecting rod 121 and the second discharge port connecting rod 122 move the same stroke.

[0159] As shown in Figure 2 and Figure 6 The first piston assembly 2 in this embodiment includes the first piston 21 and the first piston rod 22 connected to each other. The first piston rod 22 is provided with a speed regulating assembly connecting portion 23 and a return spring stop ring 24. As shown in Figure 1 The speed regulating assembly connecting portion 23 is connected to the piston limiting member 45 on the pushing member 43. As shown in Figure 3As shown, the speed regulating assembly connecting part 23 is formed by a boss structure on the first piston rod 22, and the piston limiting part 45 is formed by a groove in the boss on the pushing member 43. The speed regulating assembly connecting part 23 is embedded in the piston limiting part 45 to achieve the fixed connection between the first piston assembly 2 and the pushing member 43. The return spring stop ring 24 is located on the lower side of the speed regulating assembly connecting part 23, and the first spring 61 is located between the return spring stop ring 24 and the upper top surface of the first piston moving cavity 51 to push the first piston assembly 2 to reset relative to the first piston moving cavity 51 when there is no external driving force. In other embodiments, the first spring 61 can also be arranged at other positions that can push the first piston assembly 2 to reset.

[0160] As shown in the drawings, Figure 7A The second piston assembly 3 includes a second piston and a second piston rod 32 connected to each other. A connecting rib 33 is arranged at a position of the second piston rod 32 connected to the second discharge port connecting rod 122. A clamping groove is arranged at a corresponding position of the second discharge port connecting rod 122. The connecting rib 33 is embedded in the clamping groove to ensure the fixed connection between the second piston assembly 3 and the second discharge port connecting rod 122, and to ensure that they can move up and down synchronously. A return spring hole 34 is further arranged at the bottom of the second piston. The second spring 62 is arranged between the return spring hole 34 and the second piston moving cavity 52 to push the second piston assembly 3 to reset relative to the second piston moving cavity 52 when there is no external driving force. In other embodiments, the second spring 62 can also be arranged at other positions that can push the second piston assembly 3 to reset.

[0161] As shown in the drawings, Figure 7B A shunt groove 9 is further arranged in the second piston.

[0162] As shown in the drawings, Figure 1 and Figure 3 A one-way valve 8 is arranged at the bottom of the first piston moving cavity 51 and the second piston moving cavity 52 to avoid backflow.

[0163] As shown in the drawings, Figure 4 and Figure 8 The guiding mechanism in this embodiment includes two guiding ribs 71 arranged on the pressing discharge mechanism 1 and two guiding grooves 72 arranged on the tank connecting mechanism 5. The guiding ribs 71 and the guiding grooves 72 are arranged opposite to each other, and are matched and sleeved together. They can be relatively displaced under the driving of the pressing discharge mechanism 1 and the tank connecting mechanism 5, effectively limiting the displacement direction of the two, so that they can only move axially and linearly relative to each other, preventing lateral displacement.

[0164] The working principle of the pump body driving device in the above embodiments is as follows:

[0165] As shown in the drawings, Figure 1 and Figure 3As shown, assuming the stroke value of the second piston assembly 3 is a (i.e. the distance from the second piston to the bottom of the second piston moving cavity 52), the stroke value of the first piston assembly 2 is b (i.e. the distance from the first piston to the bottom of the first piston moving cavity 51), the relative movement distance between the screw transmission member 42 and the pushing member 41 (i.e. the pressing discharging mechanism 1) is c (i.e. the distance from the bottom surface of the pushing member 41 to the connecting member 44), and the relative movement distance between the screw transmission member 42 and the tank connecting mechanism 5 is d (i.e. the distance between the bottom surface of the screw transmission member 42 and the top surface of the first piston moving cavity 51), wherein c≥a-b (i.e. the relative movement distance between the screw transmission member 42 and the pressing discharging mechanism 1 is greater than or equal to the stroke difference of the two piston assemblies), and d≥b (i.e. the relative movement distance between the screw transmission member 42 and the tank connecting mechanism 5 is greater than or equal to the stroke value of the first piston assembly 2);

[0166] In operation, the first output helical surface 461 provided on the pushing member 41 of the pressing discharging mechanism 1 and the first input helical surface 462 provided on the screw transmission member 42 are mutually cooperating helical structures with the same lead, and the lead is e. The helical groove 471 on the screw transmission member 42 and the helical rib 472 provided on the output helical sleeve 53 are mutually cooperating helical structures with the same lead, and the lead is f. In implementation, the lead ratio of e and f can be set as

[0167] When the pressing discharging mechanism 1 is pressed, the pressing discharging mechanism 1 moves downward under the action of external force, and the first output helical surface 461 slides downward along the first input helical surface 462, driving the screw transmission member 42 to rotate and move axially. At this time, the pressing discharging mechanism 1 and the screw transmission member 42 move downward in the axial direction, but because the pushing member 41 slides downward along the first input helical surface 462, the screw transmission member 42 slides upward along the first output helical surface 461, so the downward movement distance of the screw transmission member 42 in the axial direction is shorter than that of the pushing member 41.

[0168] At the same time, because the tank connecting mechanism 5 is fixed, when the screw transmission member 42 rotates downward, the helical groove 471 slides downward along the helical rib 472, and the screw transmission member 42 moves downward relative to the tank connecting mechanism 5 in the axial direction.

[0169] Assuming that the axial relative movement distance between the pressing discharging mechanism 1 and the screw transmission member 42 is g, the axial relative movement distance between the screw transmission member 42 and the tank connecting mechanism 5 is h, and the axial movement distance of the pressing discharging mechanism 1 is i, because there is no gap in the axial direction during the transmission of external force from the pressing discharging mechanism 1 to the tank connecting mechanism 5, i.e. there is no idle stroke in the axial direction, so g+h=i, and the deduction process is as follows:

[0170] Assume that the axial movement distance of the pressing discharge mechanism 1 downward is X 100 , the axial movement distance of the deceleration pushing mechanism downward is X 200 , the tank connecting mechanism 5 is fixed, and its axial movement distance is 0. During the movement of the pump body driving device, when the pressing discharge mechanism 1 and the deceleration pushing mechanism move downward, the deceleration pushing mechanism rotates upward relative to the pressing discharge mechanism 1, so X 200 <X 100 , g = X 100 -X 200 , h = X 200 , g + h = X 100 -X 200 + X 200 = X 100 = i.

[0171] The upper end of the deceleration pushing mechanism is connected with the pressing discharge mechanism 1, and the lower end is connected with the tank connecting mechanism 5. When the deceleration pushing mechanism rotates, the first input helical surface 462 moves upward along the first output helical surface 461, and the helical groove 471 moves downward along the helical rib 472.

[0172] As described above, the helical movement can be decomposed into the circumferential rotational movement and the axial movement. Since the rotational travel (angle) of the two ends of the deceleration pushing mechanism is the same, the ratio of the relative axial movement of the input end and the output end of the deceleration pushing mechanism is equal to the lead ratio of the threads, that is

[0173] As described above, the axial travel a of the second piston assembly 3 after being subjected to the force and moving downward, so a = i = g + h, and because Therefore, we can obtain:

[0174]

[0175]

[0176] Therefore, when the thread lead ratio of the first input helical surface 462 of the deceleration pushing mechanism and the helical groove 471 is set to be equal to the ratio of the travel difference of the two piston assemblies and the travel of the first piston assembly 2, that is , the axial travel of the deceleration pushing mechanism downward is h = b.

[0177] Since the pressing discharge mechanism 1 is directly connected with the second piston assembly 3, the travel of the pressing discharge mechanism 1 is the same as that of the second piston assembly 3. The pressing discharge mechanism 1 is connected with the first piston assembly 2 through the speed regulating assembly, and the first piston assembly 2 is driven to move by the speed regulating assembly. Therefore, the axial travel of the deceleration pushing mechanism downward is the same as that of the first piston assembly 2.

[0178] Therefore, the pitch ratio of the first input helical surface 462 of the deceleration pushing mechanism and the helical groove 471 is set to the ratio of the stroke difference of the two piston assemblies and the stroke of the first piston assembly 2, that is, h / a=(b-a) / b. When the pressing discharging mechanism 1 pushes the second piston assembly 3 to complete the stroke a, the deceleration pushing mechanism pushes the first piston assembly 2300 to complete the stroke h=b downward, reaching the designed value, and the set deceleration design goal can be achieved.

[0179] At this time, since g=a-b and h=b, the relative movement space c of the deceleration pushing mechanism and the pressing discharging mechanism 1 should be greater than or equal to the stroke difference a-b between the output shafts, and the relative movement space d between the deceleration pushing mechanism and the tank body connecting mechanism 5 should be greater than or equal to the stroke b of the longest output shaft.

[0180] Therefore, the effective realization of one input driving multiple synchronous different speed outputs to perform reciprocating linear motion is achieved.

[0181] Second embodiment:

[0182] The working principle of the pump body driving device in this embodiment is the same as that of the pump body driving device in the first embodiment, and the structure is also relatively similar. Therefore, the structure of the same parts will not be described again, and only the different parts will be described below:

[0183] In this embodiment, the second helical assembly includes a helical rib 472 arranged on one side of the helical transmission member 42 facing the output helical sleeve and an output helical groove 471 arranged on one side of the output helical sleeve facing the helical transmission member 42, and the helical rib 472 is slidably arranged in the helical groove 471.

[0184] Third embodiment:

[0185] The working principle of the pump body driving device in this embodiment is the same as that of the pump body driving device in the first embodiment, and the structure is also relatively similar. Therefore, the structure of the same parts will not be described again, and only the different parts will be described below:

[0186] As shown in Figure 9 The helical transmission member 42 of the pump body driving device in this embodiment is sleeved on the inside of the pushing member 41, the first helical assembly is arranged between the pushing member 41 and the helical transmission member 42, the pushing member 41 and the helical transmission member 42 are helically transmitted through the first helical assembly, and the pitch of the first helical assembly constitutes the thread pitch of the input side of the helical transmission member 42.

[0187] The pushing member 43 is directly arranged on the inner side wall of the screw transmission member 42, and the piston limiting member is connected with the corresponding first piston assembly by the pushing member 43.

[0188] The upper part of the piston moving cavity where the first piston assembly is arranged is provided with an output screw sleeve, the screw transmission member 42 is arranged outside the corresponding output screw sleeve, and the screw transmission member 42 and the output screw sleeve are connected through a second screw assembly. The screw transmission member 42 and the output screw sleeve are screw transmission through the second screw assembly, and the lead of the second screw assembly forms the thread lead of the output side of the screw transmission member 42.

[0189] In this embodiment, the diameter of the position of the screw transmission member 42 which is connected with the pushing member 41 is smaller than the diameter of the position of the screw transmission member 42 which is connected with the output screw sleeve, so as to form a shaft shoulder structure on the screw transmission member 42. During use, the shaft shoulder structure can be used to limit the pushing member 41.

[0190] The fourth embodiment:

[0191] The working principle of the pump body driving device in this embodiment is the same as that of the pump body driving device in the third embodiment, and the structure is also similar. Therefore, the structure of the same part will not be described again, and only the different parts will be described below:

[0192] In this embodiment, the second screw assembly includes a screw rib 472 arranged on one side of the screw transmission member 42 which is directed to the output screw sleeve and an output screw groove 471 arranged on one side of the output screw sleeve which is directed to the screw transmission member 42, and the screw rib 472 is slidably arranged in the screw groove 471. The structure of the screw transmission member 42 in this embodiment can be referred to Figure 10 The structure of the output screw sleeve in the tank body connecting mechanism in this embodiment can be referred to Figure 11 .

[0193] The fifth embodiment:

[0194] The working principle of the pump body driving device in this embodiment is the same as that of the pump body driving device in the first embodiment, and the structure is also similar. Therefore, the structure of the same part will not be described again, and only the different parts will be described below:

[0195] The screw transmission member 42 in the pump body driving device in the embodiment is sleeved on the inner side of the pushing member 41, a first screw assembly is arranged between the pushing member 41 and the screw transmission member 42, the pushing member 41 and the screw transmission member 42 are screw transmission through the first screw assembly, and the lead of the first screw assembly constitutes the thread lead of the input side of the screw transmission member 42.

[0196] The pushing member 43 is arranged on the inner wall of the screw transmission member 42, and the pushing member 43 constitutes the piston limiting piece connected with the corresponding first piston assembly.

[0197] The upper side of the piston moving cavity where the first piston assembly is arranged is provided with an output screw sleeve, the screw transmission member 42 is arranged outside the corresponding output screw sleeve, a second screw assembly is arranged between the screw transmission member 42 and the output screw sleeve, the screw transmission member 42 and the output screw sleeve are screw transmission through the second screw assembly, and the lead of the second screw assembly constitutes the thread lead of the output side of the screw transmission member 42.

[0198] In the embodiment, the diameter of the position of the screw transmission member 42 abutting against the pushing member 41 is smaller than the diameter of the position of the screw transmission member 42 abutting against the output screw sleeve, so as to form a shaft shoulder structure on the screw transmission member 42, and the pushing member 41 can be limited by the shaft shoulder structure in use.

[0199] Sixth embodiment:

[0200] The working principle of the pump body driving device in the embodiment is the same as that of the pump body driving device in the fifth embodiment, and the structure is also relatively similar, so the structure of the same part will not be described again, and only the different parts will be described below:

[0201] In the embodiment, the second screw assembly comprises a screw rib 472 arranged on one side of the screw transmission member 42 facing the output screw sleeve and an output screw groove 471 arranged on one side of the output screw sleeve facing the screw transmission member 42, and the screw rib 472 is slidably arranged in the screw groove 471.

[0202] The pump body driving device has the advantages of simple and reliable structure, wide application scene, suitability for daily household, easy industrial quantitative production, low cost, simple calculation of reduction ratio adjustment, and effective realization of one input driving multiple synchronous different-speed outputs for reciprocating linear motion.

[0203] The preferred embodiments of the present application have been described above in detail. It should be understood that modifications and variations to the preferred embodiments could be made by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that there be included within the scope of the application, all such modifications and variations as would be apparent to those skilled in the art upon reading this disclosure. It is intended to obtain for the inventors such patent rights as are available for any patent granted on the present application.

Claims

1. A pump body drive apparatus characterized by comprising: The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device.

4. A pump body drive arrangement according to claim 2 or 3, characterised in that, The application relates to a pump body driving device.

5. The pump body drive apparatus according to claim 2 or 3, characterized by The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. The application relates to a pump body driving device. 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6. The pump body drive apparatus of claim 5, wherein An output screw sleeve is arranged above the piston moving cavity in which the first piston assembly is arranged, the screw transmission member is connected to the corresponding output screw sleeve, and a second screw assembly is arranged between the screw transmission member and the output screw sleeve, the screw transmission member and the output screw sleeve are screw driven through the second screw assembly, and the lead of the second screw assembly constitutes the thread lead of the output side of the screw transmission member.

7. The pump body drive apparatus of claim 6, wherein The screw transmission member is arranged inside the corresponding output screw sleeve, or the screw transmission member is arranged outside the corresponding output screw sleeve.

8. The pump body drive apparatus of claim 6, wherein The second screw assembly comprises an output screw groove arranged on one side of the screw transmission member facing the output screw sleeve and a screw rib arranged on one side of the output screw sleeve facing the screw transmission member, and the screw rib is slidably arranged in the screw groove; or The second screw assembly comprises a screw rib arranged on one side of the screw transmission member facing the output screw sleeve and an output screw groove arranged on one side of the output screw sleeve facing the screw transmission member, and the screw rib is slidably arranged in the screw groove.

9. The pump body drive apparatus of claim 5, wherein When the pump body connecting mechanism comprises at least one piston assembly that is not connected to the corresponding discharge port connecting rod through the speed regulating assembly, the at least one piston assembly that is not connected to the corresponding discharge port connecting rod through the speed regulating assembly constitutes a second piston assembly. The second piston assembly comprises a second piston and a second piston rod, a second channel in the second piston assembly passes through the second piston and the second piston rod, one end of the second piston rod is connected to the second piston, and the other end of the second piston rod is connected to the corresponding discharge port connecting rod.

10. The pump body drive apparatus of claim 5, wherein The pump body driving device further comprises: A plurality of elastic reset assemblies corresponding to the discharge ports are arranged between the corresponding piston assemblies and the piston moving cavities to drive the piston assemblies to reset relative to the piston moving cavities when there is no external driving force.

11. The pump body drive apparatus of claim 5, wherein The pump body driving device further comprises: A guide mechanism is arranged between the tank body connecting mechanism and the pressing discharge mechanism, and the guide mechanism defines the relative displacement direction between the tank body connecting mechanism and the pressing discharge mechanism.

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