Rotary plunger pump head angle adjusting assembly

Abstract

The utility model discloses a pump head angle adjusting assembly of a rotary plunger pump. The pump head angle adjusting assembly comprises a connecting screw, a thrust bearing, an overturning base, a sleeve and a screw rod. The connecting screw is in threaded connection with one end of the sleeve, the screw rod is in threaded connection with the other end of the sleeve, and the connecting screw, the thrust bearing, the sleeve and the screw rod are coaxial; a through hole is formed in the overturning base, a structural body formed by the connecting screw and the sleeve penetrates through the through hole, and the screw cap end of the connecting screw and the end, used for being connected with the screw rod, of the sleeve are both located outside the overturning base; the thrust bearing is arranged on the structural body in a sleeving mode and clamped between the nail cap end and the overturning base, and the overturning base is clamped between the thrust bearing and the sleeve. And the sleeve can rotate around the axis of the sleeve relative to the overturning seat. The scheme is used for adjusting the angle of the pump head end of the rotary plunger pump, and has the characteristics of simple structure and convenience in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary plunger pump regulating mechanisms, in particular to a rotary plunger pump head angle regulating component. Background Art

[0002] Precision micro-liquid flow pumps are common fluid conveying machines in many industries, especially in the fields of medicine, medical treatment, and biochemical testing. They are also commonly used as fluid batching equipment in production lines in various industries. Among the performance characteristics of this type of pump, its flow rate and flow rate accuracy are important parameters of the pump. At the same time, its performance parameters also need to consider flow rate accuracy, flow rate accuracy stability, etc.

[0003] As an important form of precision micro-liquid flow pump, the basic composition of the rotary plunger pump is as provided in the patent document with application number CN200720082409.8 and invention name of rotary plunger pump. Common rotary plunger pumps mostly include a pump rod, a pump sleeve and a driving mechanism. The front end of the pump rod is provided with a notch and is matched with the pump sleeve with high precision. The pump sleeve is provided with inlet and outlet pipes. The rear end of the pump rod is connected to the driving mechanism for outputting the rotary motion. The specific connection position of the pump rod on the driving mechanism is eccentric relative to the rotation center of the rotary motion. When the driving mechanism rotates, under the action of the driving mechanism, the pump rod reciprocates linearly along the axis of the pump sleeve in the pump sleeve and rotates around its own axis. The above reciprocating motion is the suction and extrusion action of the pump, and the rotation is to switch the conduction relationship between the volume chamber inside the pump sleeve and the inlet and outlet pipes. Compared with the traditional piston pump, one of the characteristics is to avoid the need for a one-way valve for the rotary plunger pump.

[0004] According to the specific fluid delivery needs, one of the control parameters of the rotary piston pump includes how to control the flow rate. To address this issue, in the prior art, the patent application document with application number CN201822069211.7 and invention name "A metering pump angle adjustment device", as well as the patent document with application number CN202121394021.8 and name "Flow-adjustable rotary piston pump", both disclose rotary piston pump flow regulation schemes or rotary piston pumps with flow regulation capabilities. At the same time, the basic principles of the above two schemes are to achieve precise regulation of the flow rate by designing a corresponding pump head end angle adjustment structure and adjusting the pump head end angle.

[0005] In view of the important role of rotary piston pumps in industrial production and other industries, it is necessary to further improve the structure of rotary piston pumps. Utility Model Content

[0006] In view of the above-mentioned technical problem of optimizing the rotary plunger pump, the utility model provides a rotary plunger pump head angle adjustment component. This scheme is used for adjusting the angle of the rotary plunger pump head end, and has the characteristics of simple structure and convenient installation.

[0007] In view of the above problems, the utility model provides a rotary plunger pump head angle adjustment component to solve the problem through the following technical points: a rotary plunger pump head angle adjustment component, including a connecting screw, a thrust bearing, a flip seat, a sleeve and a screw;

[0008] The connecting screw is threadedly connected to one end of the sleeve, the screw is threadedly connected to the other end of the sleeve, and the connecting screw, the thrust bearing, the sleeve and the screw are coaxial;

[0009] The flip seat is provided with a through hole, and a structure formed by a connecting screw and a sleeve passes through the through hole, and the nail cap end of the connecting screw and the end of the sleeve used for connecting with the screw rod are both located outside the flip seat;

[0010] The thrust bearing is sleeved on the structure and clamped between the nail cap end and the flip seat, and the flip seat is clamped between the thrust bearing and the sleeve;

[0011] The sleeve can rotate relative to the flip seat around the axis of the sleeve.

[0012] The flow adjustment method of the rotary plunger pump includes controlling the number of times the plunger moves and controlling the stroke during the plunger movement. The stroke adjustment can be achieved after the angle of the pump head of the plunger pump is adjusted. For the purpose of the stroke adjustment, an adjustment device is provided in the prior art with patent application number CN201822069211.7. The device includes a base and a mounting frame rotatably connected to the base, and also includes an angle adjustment mechanism arranged between the base and the mounting frame. The base is used to install the drive motor, and the mounting frame is used to install the pump head. The angle adjustment mechanism includes an adjusting screw, an adjusting nut, a ball bolt, a movable mounting seat, etc. When the pump head needs to be adjusted in angle to adjust the stroke of the plunger, the adjusting nut is rotated to change the length of the fit formed by the adjusting nut and the adjusting screw, and the eye screw and the ball head are rotated to achieve the purpose of adjusting the angle of the base and the mounting frame.

[0013] For the purpose of relevant pump head angle adjustment, the present scheme provides the rotary piston pump pump head angle adjustment component as described above. When it is used specifically, if the second plate body as described below is used to install the driving device of the rotary piston pump, the first plate body is used to install the pump head of the rotary piston pump, and is specifically installed as follows: the flip seat can be rotatably connected to the second plate body, and the flip seat can rotate around the axis of the flip seat relative to the second plate body; the screw can be rotatably connected to the first plate body, and the screw can rotate around the rotating shaft perpendicular to the screw axis relative to the first plate body, and the rotating shaft is parallel to the axis of the flip seat. In this way, when the sleeve is rotated, the protruding length of the screw relative to the sleeve changes. According to the rotation direction of the sleeve, the change is used to apply thrust or pulling force to the first plate body and the second plate body, so that the angle between the first plate body and the second plate body changes, thereby achieving the purpose of adjusting the angle of the pump head end of the rotary piston pump to adjust the plunger stroke.

[0014] At the same time, in the above scheme, the screw and the sleeve are threadedly connected, the connecting screw and the sleeve are threadedly connected, and the flip seat and the thrust bearing are clamped between the connecting screw and the sleeve. The above scheme is not only simple in structure, but also realizes the tight fit of the axial components of the adjusting assembly by clamping the thrust bearing and the flip seat by the connecting screw. When torque is applied to the sleeve to make it rotate, since the thrust bearing is clamped between the nail cap end and the flip seat, when the connecting thread between the connecting screw and the sleeve is installed to have a certain elastic deformation, since the resistance to the rotation of the connecting screw relative to the flip seat is only the rolling friction occurring on the thrust bearing, relative to the connecting screw, whether the sleeve is rotating forward or reverse, the sleeve can easily drive the connecting screw to rotate relative to the flip seat, thereby avoiding the connection screw from loosening. Therefore, this scheme has the characteristics of high structural reliability on the basis of simple structure.

[0015] The matching relationship between the flip seat and the sleeve can be that one end of the sleeve directly presses on the side of the flip seat, or the side of the flip seat acts on the step surface of the sleeve, and the sleeve has a barrel section extending into the through hole. In the process of screwing the connecting screw into the sleeve, the specific screwing depth is controlled by the thrust bearing: the gasket at one end of the thrust bearing is supported on the flip seat, and the nail cap end is supported by the gasket at the other end of the thrust bearing.

[0016] In a specific implementation, in order to make the connecting screw and the thrust bearing maintain an ideal matching relationship for a long time, it is set to have a groove on the flip seat that matches the thrust bearing gasket, and a groove on the thrust bearing gasket that matches the nail cap end. The groove on the flip seat is used to define the position of the thrust bearing in the radial direction of the groove, and the groove on the gasket is used to define the position of the nail cap end in the radial direction of the groove. This can effectively avoid the rod section of the connecting screw from contacting the gasket on the thrust bearing close to the flip seat due to the lateral displacement of the thrust bearing, and the rod section from contacting the retainer of the thrust bearing. Further, the sleeve has the step surface and has a barrel section embedded in the through hole, so as to contact the hole wall of the through hole through the side wall of the sleeve, thereby avoiding direct contact between the rod section and the flip seat.

[0017] In a specific embodiment, in order to maintain a tight fit between the connecting screw and the sleeve, the axial force between the connecting screw and the sleeve can be maintained by an additional elastic pad, which can be arranged between the thrust bearing and the flip seat, or between the thrust bearing and the nail cap end.

[0018] As a further technical solution of the rotary piston pump head angle adjustment assembly:

[0019] The sleeve is in the shape of a stepped shaft, and one end of the sleeve connected to the connecting screw is embedded in the through hole, and the flip seat is clamped between the shaft shoulder on the sleeve and the end of the thrust bearing. This scheme is a technical scheme proposed above, which constrains the flip seat at one end of the sleeve in the axial direction by forming a stepped surface on the sleeve, and avoids direct contact between the connecting screw rod section and the flip seat by embedding the sleeve into the through hole. Since the sleeve rotates synchronously as a whole when a torque is applied to the sleeve, the friction between the sleeve and the flip seat is easy to overcome and will not cause other adverse effects. The preferred application is that the outer diameter of the through hole is consistent with the inner diameter of the through hole to avoid the sleeve having a shaking gap relative to the flip seat in its radial direction.

[0020] The flip seat is a strip-shaped structure, and planes are provided on opposite sides of the flip seat in the width direction, one of which acts on the end of the thrust bearing, and the other acts on the sleeve;

[0021] A first rolling bearing is installed at each end of the flip seat in the length direction, and the axis of the first rolling bearing is colinear with the axis of the flip seat. In this scheme, the flip seat is a columnar structure having the plane on each side of a pair of opposite sides thereof, and the first rolling bearing is installed at the end of the flip seat and is coaxial with the flip seat, so that a second cross-shaped second groove body is set on the second plate body as follows, the first rolling bearing and the flip seat are embedded in the transverse groove of the second groove body, and the longitudinal groove of the second groove body accommodates the sleeve, the thrust bearing and the connecting screw, and when the sleeve moves axially relative to the screw on the axis of the screw, the sleeve, the flip seat and the thrust bearing flip around the rotation center of the first rolling bearing. The structure provided by this scheme is not only simple in structure and easy to install, but also has the characteristic of being favorable to the angle adjustment accuracy of the pump head due to the flexible rotation of the flip seat.

[0022] Similar to the above, during the turning process of the sleeve, etc., the screw needs to turn over correspondingly relative to the first plate body. Therefore, as a technical solution with simple structure, convenient installation, and flexible screw rotation, each side of a pair of opposite sides of the screw is connected with a second rolling bearing through a rotating shaft, and the second rolling bearing is coaxial, and the axis of the second rolling bearing is perpendicular to the axis of the screw. When the second rolling bearing is arranged at the free end of the screw, the first groove body can be set as a T-shaped groove, the transverse groove of the first groove body is used to install the second rolling bearing, and the longitudinal groove of the first groove body is used to accommodate the screw. For the first rolling bearing and the second rolling bearing, when they are installed on the first plate body and the second plate body respectively through the corresponding groove body, each can be constrained by the end of the corresponding transverse groove on the first groove body and the second groove body. The first rolling bearing and the second rolling bearing are respectively connected with the turning seat and the screw by a simple connection mechanism, such as the first rolling bearing and the second rolling bearing are: the inner ring is interference-fitted with the rotating shaft, the corresponding rotating shaft is interference-connected with the turning seat or the screw, and the outer ring is clamped in the corresponding transverse groove.

[0023] In order to facilitate monitoring of the angle of the pump head, it is configured as follows: it also includes scale markings arranged on the screw and spaced apart along the axis of the screw.

[0024] In order to facilitate the application of torque to the sleeve, it is configured as follows: a matching surface for matching with the wrench bayonet is provided on the side surface of the sleeve.

[0025] Also includes a first plate body and a second plate body which are rotatably connected to each other;

[0026] The flip seat is rotatably connected to the second plate body, and the flip seat can rotate around the axis of the flip seat relative to the second plate body;

[0027] The screw is rotatably connected to the first plate body, and the screw can rotate relative to the first plate body around a rotation axis perpendicular to the screw axis, and the rotation axis is parallel to the axis of the flip seat. In this solution, one of the first plate body and the second plate body is used to install the driving mechanism of the rotary plunger pump, and the other is used to install the pump head. The extension length of the screw relative to the sleeve is adjusted by rotating the sleeve, thereby providing thrust or pulling force for adjusting the angle between the first plate body and the second plate body.

[0028] On the structure formed by the first plate and the second plate, the position for forming the rotational connection is located at the first position of the structure, the position for installing the flip seat and the screw is located at the second position of the structure, and the first position and the second position are located on a pair of opposite sides of the structure. This solution is that the position for the rotational connection between the first plate and the second plate is located at one end of the structure, and the structure for driving the first plate and the second plate to rotate is installed at the other end of the structure, and the one end and the other end are a pair of opposite ends. In this structure, the distance between the one end and the other end is relatively far, so this solution has the characteristic of high accuracy in adjusting the angle of the pump head.

[0029] The first plate body is provided with a first slot body, and the second plate body is provided with a second slot body;

[0030] The flip seat is installed in the second slot body through a first rolling bearing, and the axis of the first rolling bearing is perpendicular to the axis of the connecting screw;

[0031] The screw is installed in the first slot body through a second rolling bearing, and the axis of the second rolling bearing is perpendicular to the axis of the connecting screw. This solution is a solution proposed above that uses the corresponding slot body to complete the flip seat constraint and the screw end constraint. This solution has a simple structure and is easy to assemble.

[0032] It also includes a second cover plate connected to the second plate body by screws and used to close the second tank body;

[0033] The first cover plate is connected to the first plate body by screws and is used to close the first slot body. In this solution, the second cover plate is used to prevent the flip seat and the first rolling bearing from falling out of the second slot body, and the first cover plate is used to prevent the second rolling bearing from falling out of the first slot body, so as to improve the reliability of the structure.

[0034] The utility model has the following beneficial effects:

[0035] This solution can not only be used to adjust the angle of the pump head end of the rotary plunger pump to adjust the stroke of the plunger during movement, but also has the characteristics of simple structure, easy assembly and high structural reliability. When it is used to realize the rotatable connection between the flip seat and the second plate body and the rotatable connection between the screw and the first plate body by means of corresponding grooves on the plate body, there is no need to set a flip mechanism on the structure formed by the connecting screw, flip seat, sleeve and screw. Therefore, the structural characteristics of this solution are beneficial to the small volume design and hidden design of the angle adjustment component. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A top view of a specific embodiment of a rotary piston pump head angle adjustment assembly described in this solution;

[0037] Figure 2 This is a partial cross-sectional view of the local structure of a specific embodiment of a rotary piston pump head angle adjustment assembly described in the present invention.

[0038] The reference numerals in the figure are: 1. connecting screw, 2. thrust bearing, 3. first rolling bearing, 4. flip seat, 5. sleeve, 6. screw, 7. rotating shaft, 8. second rolling bearing, 9. first plate body, 10. second trough body, 11. second plate body, 12. first trough body. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the embodiments, but the present invention is not limited to the following embodiments:

[0040] Embodiment 1:

[0041] like Figure 1 and Figure 2 As shown, a rotary piston pump head angle adjustment assembly includes a connecting screw 1, a thrust bearing 2, a flip seat 4, a sleeve 5 and a screw 6;

[0042] The connecting screw 1 is threadedly connected to one end of the sleeve 5, and the screw 6 is threadedly connected to the other end of the sleeve 5. The connecting screw 1, the thrust bearing 2, the sleeve 5 and the screw 6 are coaxial.

[0043] The flip seat 4 is provided with a through hole, and the structure formed by the connecting screw 1 and the sleeve 5 passes through the through hole, and the nail cap end of the connecting screw 1 and the end of the sleeve 5 for connecting with the screw rod 6 are both located outside the flip seat 4;

[0044] The thrust bearing 2 is sleeved on the structure and clamped between the nail cap end and the flip seat 4, and the flip seat 4 is clamped between the thrust bearing 2 and the sleeve 5;

[0045] The sleeve 5 can rotate relative to the tilting seat 4 around the axis of the sleeve 5 .

[0046] The flow adjustment method of the rotary plunger pump includes controlling the number of times the plunger moves and controlling the stroke during the plunger movement. The stroke adjustment can be achieved after the angle of the pump head of the plunger pump is adjusted. For the purpose of the stroke adjustment, an adjustment device is provided in the prior art with patent application number CN201822069211.7. The device includes a base and a mounting frame rotatably connected to the base, and also includes an angle adjustment mechanism arranged between the base and the mounting frame. The base is used to install the drive motor, and the mounting frame is used to install the pump head. The angle adjustment mechanism includes an adjusting screw 6, an adjusting nut, a ball head bolt, a movable mounting seat, etc. When the pump head needs to be adjusted in angle to adjust the stroke of the plunger, the adjusting nut is rotated to change the length of the fitting formed by the adjusting nut and the adjusting screw 6, and the eye screw and the ball head are rotated to achieve the purpose of adjusting the angle of the base and the mounting frame.

[0047] For the purpose of adjusting the relevant pump head angle, the present scheme provides the rotary piston pump pump head angle adjustment component as described above. When it is used specifically, the second plate body 11 as described below is used to install the driving device of the rotary piston pump, and the first plate body 9 is used to install the pump head of the rotary piston pump, and is specifically installed as follows: the flip seat 4 can be rotatably connected to the second plate body 11, and the flip seat 4 can rotate around the axis of the flip seat 4 relative to the second plate body 11; the screw 6 can be rotatably connected to the first plate body 9, and the screw 6 can rotate around the rotating shaft perpendicular to the axis of the screw 6 relative to the first plate body 9, and the rotating shaft is parallel to the axis of the flip seat 4. In this way, when the sleeve 5 is rotated, the protruding length of the screw 6 relative to the sleeve 5 changes. According to the rotation direction of the sleeve 5, the change is used to apply thrust or pulling force to the first plate body 9 and the second plate body 11, so that the angle between the first plate body 9 and the second plate body 11 changes, thereby achieving the purpose of adjusting the angle of the pump head end of the rotary piston pump to adjust the plunger stroke.

[0048] At the same time, in the above scheme, the screw 6 is threadedly connected to the sleeve 5, the connecting screw 1 is threadedly connected to the sleeve 5, and the flip seat 4 and the thrust bearing 2 are clamped between the connecting screw 1 and the sleeve 5. The above scheme is not only simple in structure, but also realizes the tight fit of the axial components of the adjustment assembly by clamping the thrust bearing 2 and the flip seat 4 by the connecting screw 1. When torque is applied to the sleeve 5 to make it rotate, since the thrust bearing 2 is clamped between the nail cap end and the flip seat 4, when the connecting thread between the connecting screw 1 and the sleeve 5 is installed to have a certain elastic deformation, since the resistance to the rotation of the connecting screw 1 relative to the flip seat 4 is only the rolling friction occurring on the thrust bearing 2, relative to the connecting screw 1, whether when the sleeve 5 rotates forward or reversely, the sleeve 5 can easily drive the connecting screw 1 to rotate relative to the flip seat 4, thereby avoiding the connection screw 1 from loosening. Therefore, this scheme has the characteristics of high structural reliability on the basis of simple structure.

[0049] As for the matching relationship between the flip seat 4 and the sleeve 5, one end of the sleeve 5 can be directly pressed on the side of the flip seat 4, or the side of the flip seat 4 can act on the step surface of the sleeve 5, and the sleeve 5 has a barrel section extending into the through hole. In the process of screwing the connecting screw 1 into the sleeve 5, the specific screwing depth is controlled by the thrust bearing 2: the gasket at one end of the thrust bearing 2 is supported on the flip seat 4, and the nail cap end is supported by the gasket at the other end of the thrust bearing 2.

[0050] Preferably, in order to keep the connecting screw 1 and the thrust bearing 2 in an ideal matching relationship for a long time, it is set to have a groove on the flip seat 4 that matches the gasket of the thrust bearing 2, and a groove on the gasket of the thrust bearing 2 that matches the nail cap end. The groove on the flip seat 4 is used to define the position of the thrust bearing 2 in the radial direction of the groove, and the groove on the gasket is used to define the position of the nail cap end in the radial direction of the groove. This can effectively avoid the contact between the rod section of the connecting screw 1 and the gasket on the thrust bearing 2 close to the flip seat 4 due to the lateral displacement of the thrust bearing 2, and the contact between the rod section and the retainer of the thrust bearing 2. Further, the sleeve 5 has the step surface and has a barrel section embedded in the through hole, so as to contact the hole wall of the through hole through the side wall of the sleeve 5, and avoid direct contact between the rod section and the flip seat 4.

[0051] Preferably, in order to maintain a tight fit between the connecting screw 1 and the sleeve 5, the axial force between the connecting screw 1 and the sleeve 5 can be maintained by an additional elastic pad, which can be arranged between the thrust bearing 2 and the flip seat 4, or between the thrust bearing 2 and the nail cap end.

[0052] Embodiment 2:

[0053] This embodiment is further limited on the basis of Embodiment 1:

[0054] The sleeve 5 is in the shape of a stepped shaft, and one end of the sleeve 5 connected to the connecting screw 1 is embedded in the through hole, and the flip seat 4 is clamped between the shaft shoulder on the sleeve 5 and the end of the thrust bearing 2. This scheme is a technical scheme proposed above, which constrains the flip seat 4 at one end of the sleeve 5 in the axial direction by forming a stepped surface on the sleeve 5, and avoids direct contact between the connecting screw 1 rod section and the flip seat 4 by embedding the sleeve 5 in the through hole. Since the sleeve 5 rotates synchronously as a whole when a torque is applied to the sleeve 5, the friction between the sleeve 5 and the flip seat 4 is easy to overcome and will not cause other adverse effects. The preferred application is that the outer diameter of the through hole is consistent with the inner diameter of the through hole to avoid the sleeve 5 having a shaking gap relative to the flip seat 4 in its radial direction.

[0055] Embodiment 3:

[0056] This embodiment is further defined on the basis of Embodiment 1:

[0057] The flip seat 4 is a strip-shaped structure, and planes are provided on opposite sides of the flip seat 4 in the width direction, one of which acts on the end of the thrust bearing 2, and the other acts on the sleeve 5;

[0058] A first rolling bearing 3 is installed at each end of the flip seat 4 in the length direction, and the axis of the first rolling bearing 3 is colinear with the axis of the flip seat 4. In this scheme, the flip seat 4 is a columnar structure having the plane on each side of a pair of opposite sides thereof, and the first rolling bearing 3 is installed at the end of the flip seat 4 and is coaxial with the flip seat 4. In this way, a second cross-shaped second slot body 10 is set on the second plate body 11 as follows, and the first rolling bearing 3 and the flip seat 4 are embedded in the transverse slot of the second slot body 10. The longitudinal slot of the second slot body 10 accommodates the sleeve 5, the thrust bearing 2 and the connecting screw 1. When the sleeve 5 moves axially relative to the screw 6 on the axis of the screw 6, the sleeve 5, the flip seat 4, and the thrust bearing 2 flip around the rotation center of the first rolling bearing 3. The structure provided by this scheme is not only simple in structure and easy to install, but also has the characteristics of being favorable to the angle adjustment accuracy of the pump head due to the flexible rotation of the flip seat 4.

[0059] Similar to the above, during the turning process of the sleeve 5, etc., the screw 6 needs to be turned over correspondingly relative to the first plate 9. Therefore, as a technical solution with simple structure, convenient installation, and flexible rotation of the screw 6, each side of a pair of opposite sides of the screw 6 is connected with a second rolling bearing 8 through a rotating shaft 7. The second rolling bearing 8 is coaxial, and the axis of the second rolling bearing 8 is perpendicular to the axis of the screw 6. When the second rolling bearing 8 is arranged at the free end of the screw 6, the first groove body 12 can be set as a T-shaped groove, the transverse groove of the first groove body 12 is used to install the second rolling bearing 8, and the longitudinal groove of the first groove body 12 is used to accommodate the screw 6. For the first rolling bearing 3 and the second rolling bearing 8, when they are respectively installed on the first plate body 9 and the second plate body 11 through the corresponding groove bodies, each can constrain its position in the length direction of the first groove body 12 and the second groove body 10 through the end of the corresponding transverse groove on the first groove body 12 and the second groove body 10. Therefore, the first rolling bearing 3 and the second rolling bearing 8 can respectively adopt a simple connection mechanism with the flip seat 4 and the screw 6. For example, the first rolling bearing 3 and the second rolling bearing 8 are both: the inner ring is interference fit with the rotating shaft 7, the corresponding rotating shaft 7 is interference connected with the flip seat 4 or the screw 6, and the outer ring is clamped in the corresponding transverse groove.

[0060] Embodiment 4:

[0061] This embodiment is further defined on the basis of Embodiment 1:

[0062] In order to facilitate monitoring of the angle of the pump head, it is configured as follows: it also includes scale markings arranged on the screw 6 and arranged at intervals along the axis direction of the screw 6.

[0063] Embodiment 5:

[0064] This embodiment is further defined on the basis of Embodiment 1:

[0065] In order to facilitate the application of torque to the sleeve 5 , it is configured as follows: a matching surface for matching with the wrench bayonet is provided on the side surface of the sleeve 5 .

[0066] Embodiment 6:

[0067] This embodiment is further defined on the basis of Embodiment 1:

[0068] It also includes a first plate body 9 and a second plate body 11 which are rotatably connected to each other;

[0069] The flip seat 4 is rotatably connected to the second plate body 11, and the flip seat 4 can rotate around the axis of the flip seat 4 relative to the second plate body 11;

[0070] The screw 6 is rotatably connected to the first plate 9, and the screw 6 can rotate relative to the first plate 9 around a rotating shaft 7 perpendicular to the axis of the screw 6, and the rotating shaft 7 is parallel to the axis of the flip seat 4. In this solution, one of the first plate 9 and the second plate 11 is used to install the driving mechanism of the rotary piston pump, and the other is used to install the pump head. The extension length of the screw 6 relative to the sleeve 5 is adjusted by rotating the sleeve 5, thereby providing thrust or pulling force for adjusting the angle between the first plate 9 and the second plate 11.

[0071] On the structure formed by the first plate body 9 and the second plate body 11, the position for forming the rotational connection is located at the first position of the structure, the position for installing the flip seat 4 and the screw 6 is located at the second position of the structure, and the first position and the second position are located on a pair of opposite sides of the structure. This solution is that the position for the rotational connection between the first plate body 9 and the second plate body 11 is located at one end of the structure, and the structure for driving the first plate body 9 and the second plate body 11 to rotate is installed at the other end of the structure, and the one end and the other end are a pair of opposite ends. In this structure, the distance between the one end and the other end is relatively far, so this solution has the characteristic of high accuracy in adjusting the pump head angle.

[0072] The first plate body 9 is provided with a first slot body 12, and the second plate body 11 is provided with a second slot body 10;

[0073] The flip seat 4 is installed in the second slot body 10 through the first rolling bearing 3, and the axis of the first rolling bearing 3 is perpendicular to the axis of the connecting screw 1;

[0074] The screw rod 6 is installed in the first groove body 12 through the second rolling bearing 8, and the axis of the second rolling bearing 8 is perpendicular to the axis of the connecting screw 1. This scheme is a scheme proposed above that uses the corresponding groove body to complete the constraint of the flip seat 4 and the constraint of the end of the screw rod 6. This scheme has a simple structure and is easy to assemble.

[0075] It also includes a second cover plate connected to the second plate body 11 by screws and used to close the second tank body 10;

[0076] It also includes a first cover plate connected to the first plate body 9 by screws and used to close the first slot body 12. In this solution, the second cover plate is used to prevent the flip seat 4 and the first rolling bearing 3 from escaping from the second slot body 10, and the first cover plate is used to prevent the second rolling bearing 8 from escaping from the first slot body 12, so as to improve the reliability of this structure.

[0077] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments derived without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary piston pump head angle adjustment assembly, characterized in that: It comprises a connecting screw (1), a thrust bearing (2), a flip seat (4), a sleeve (5) and a screw rod (6); The connecting screw (1) is threadedly connected to one end of the sleeve (5), and the screw rod (6) is threadedly connected to the other end of the sleeve (5), and the connecting screw (1), the thrust bearing (2), the sleeve (5) and the screw rod (6) are coaxial; The flip seat (4) is provided with a through hole, and a structure formed by the connecting screw (1) and the sleeve (5) passes through the through hole, and the nail cap end of the connecting screw (1) and the end of the sleeve (5) used for connecting with the screw rod (6) are both located outside the flip seat (4); The thrust bearing (2) is sleeved on the structure and clamped between the nail cap end and the flip seat (4), and the flip seat (4) is clamped between the thrust bearing (2) and the sleeve (5); The sleeve (5) can rotate relative to the turning seat (4) around the axis of the sleeve (5).

2. A rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: The sleeve (5) is in the shape of a stepped shaft, and one end of the sleeve (5) connected to the connecting screw (1) is embedded in the through hole, and the flip seat (4) is clamped between the shaft shoulder on the sleeve (5) and the end of the thrust bearing (2).

3. The rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: The flip seat (4) is a strip-shaped structure, and planes are provided on opposite sides of the flip seat (4) in the width direction, one of the planes interacts with the end of the thrust bearing (2), and the other plane interacts with the sleeve (5); A first rolling bearing (3) is installed on each end of the flip seat (4) in the length direction, and the axis of the first rolling bearing (3) is colinear with the axis of the flip seat (4).

4. The rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: Each side of a pair of opposite sides of the screw (6) is connected to a second rolling bearing (8) via a rotating shaft (7); the second rolling bearing (8) is coaxial, and the axis of the second rolling bearing (8) is perpendicular to the axis of the screw (6).

5. The rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: It also includes scale markings arranged on the screw (6) and spaced apart along the axial direction of the screw (6).

6. The rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: A matching surface for matching with a spanner bayonet is provided on the side surface of the sleeve (5).

7. The rotary piston pump head angle adjustment assembly according to claim 1, characterized in that: It also includes a first plate body (9) and a second plate body (11) which are rotatably connected to each other; The flip seat (4) is rotatably connected to the second plate body (11), and the flip seat (4) can rotate around the axis of the flip seat (4) relative to the second plate body (11); The screw rod (6) is rotatably connected to the first plate body (9), and the screw rod (6) can rotate relative to the first plate body (9) around a rotation axis perpendicular to the axis of the screw rod (6), and the rotation axis is parallel to the axis of the flip seat (4).

8. The rotary piston pump head angle adjustment assembly according to claim 7, characterized in that: On the structure formed by the first plate body (9) and the second plate body (11), the position for forming the rotating connection is located at the first position of the structure, and the position for installing the flip seat (4) and the screw rod (6) is located at the second position of the structure. The first position and the second position are located on a pair of opposite sides of the structure.

9. The rotary piston pump head angle adjustment assembly according to claim 7, characterized in that: The first plate body (9) is provided with a first groove body (12), and the second plate body (11) is provided with a second groove body (10); The flip seat (4) is installed in the second groove body (10) through a first rolling bearing (3), and the axis of the first rolling bearing (3) is perpendicular to the axis of the connecting screw (1); The screw rod (6) is installed in the first groove body (12) via a second rolling bearing (8), and the axis of the second rolling bearing (8) is perpendicular to the axis of the connecting screw (1).

10. The rotary piston pump head angle adjustment assembly according to claim 9, characterized in that: It also includes a second cover plate connected to the second plate body (11) by screws and used to close the second tank body (10); It also comprises a first cover plate connected to the first plate body (9) by screws and used to close the first slot body (12).

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