Shell of internal gear pump and internal gear pump

Abstract

The utility model provides an internal gear pump shell and an internal gear pump, the internal gear pump shell comprises a shell assembly, the shell assembly comprises a first machine body and a second machine body which are arranged in the axial direction of the shell assembly, and the first machine body is provided with a groove formed in the radial direction of the first machine body; the tensioning assembly comprises a tensioning piece, the tensioning piece comprises a body extending in the axial direction of the shell assembly, a connecting part arranged at the first end of the body and a bent part formed by extending in the first direction along the second end of the body, and the bent part abuts against the side, away from the first machine body, of the second machine body; the connecting part is inserted into the groove, gaps are formed between the connecting part and the two sides, arranged in the axial direction of the shell assembly, of the groove, and the connecting part is connected with the first machine body through bolts. The internal gear pump provided by the utility model is compact in structure and convenient to mount and dismount.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear pump technical field, concretely relates to a casing of internal meshing gear pump and internal meshing gear pump. BACKGROUND

[0002] The internal meshing gear pump is a kind of volumetric pump widely used in fluid delivery system, the structure of the existing internal meshing gear pump is mainly composed of front and rear cover, rotor, pump body, main shaft, mechanical seal, bearing and other components, the connecting structure required between each component when assembling is more, the number of connecting parts is more, not only multiple assembly steps, cumbersome, lead to the overall structure of gear pump is relatively large, the installation space occupied is large, and installation and disassembly are troublesome, not conducive to maintenance. SUMMARY

[0003] In order to overcome the defects in the prior art, the utility model embodiment provides a casing of internal meshing gear pump and internal meshing gear pump, compact structure, easy to install and disassemble.

[0004] To achieve the above object, the utility model adopts the technical scheme that:

[0005] The utility model discloses a casing of internal meshing gear pump, comprising:

[0006] The casing assembly includes the first machine body and the second machine body arranged along the axial direction thereof, and the first machine body is provided with the groove arranged along the radial direction thereof;

[0007] The tensioning assembly includes a tensioning sheet, the tensioning sheet includes a body extending along the axial direction of the casing assembly, a connecting portion arranged at the first end of the body and a bending portion formed by extending along the second end of the body in the first direction, the bending portion abuts against the side of the second machine body away from the first machine body, the connecting portion is inserted into the groove, and there is a gap between the connecting portion and the two sides of the groove arranged along the axial direction of the casing assembly, and the connecting portion is connected to the first machine body by a bolt.

[0008] The above technical scheme sets the tensioning sheet and the bolt at the two ends of the first machine body and the second machine body, tightens the first machine body and the second machine body along the axial direction of the casing assembly, limits the casing assembly in the axial space, thereby realizing the connection and fixation of the casing assembly, reducing the types and quantities of connecting parts during installation, reducing the assembly steps, facilitating disassembly and maintenance, making the structure of the casing more compact, reducing the overall size of the gear pump, occupying small space, and facilitating installation.

[0009] Further, the second body is provided with a protrusion on the side away from the first body, and the protrusion is connected with the bent part of the tension sheet. The protrusion enables the bent structure formed by the second end of the tension sheet to be firmly clamped on the second body, so that the tension sheet can be kept in tension at all times and also kept stable when the gear pump is running.

[0010] Further, the bent part of the tension sheet further comprises an extension part extending in the second direction along the extension end of the bent part, and the second end of the tension sheet is clamped with the protrusion through the bent part and the extension part. When the first end of the tension sheet is locked by the bolt, the bent part and the extension part of the second end of the tension sheet are tightly pressed against the two sides of the protrusion, so that the protrusion is firmly clamped between the bent part and the extension part, thereby eliminating the need to provide a bolt connecting the second end of the tension sheet and the second body, further reducing the number of parts and simplifying the assembly process, while achieving the tensioning and fixing effect of the tension sheet.

[0011] Further, the connecting part and the first body are both provided with through holes, and the tension sheet is connected with the first body through the bolt passing through the through holes. When the second end of the tension sheet is clamped on the protrusion of the second body, the first end of the tension sheet is connected with the bolt to achieve the effect of tensioning, which is simple in structure and convenient to operate. The tension sheet does not need to be set too large, and can be fixed between the shell assemblies, thereby further reducing the cost.

[0012] Further, the connecting part comprises a nut, and when the tensioning assembly is connected with the shell assembly, the bolt passes through the through hole on the first body and is connected and fixed with the nut. The nut is welded with the tension sheet, so that the bolt is connected with the nut through the through hole, avoiding the interference of the space caused by the position of the first body and the tension sheet when the first end of the tension sheet is inserted into the groove, which causes the bolt and the nut to be unable to be connected.

[0013] Further, the shell assembly is provided with at least two tension sheets, and at least one end of one tension sheet is provided with a through hole. The two tension sheets are oppositely arranged on the two sides of the shell assembly, so as to form more stable tensioning and fixing of the shell assembly.

[0014] Further, the shell of the internal meshing gear pump further comprises a cover plate and an outer shell sleeved on at least part of the first body and the second body, the outer shell is located between the first body and the second body, and the cover plate is located on the side of the second body away from the first body.

[0015] Further, the cover plate has a fixing part and an inner recess, and when the tensioning assembly is connected with the shell assembly, the fixing part is connected on the protrusion of the second body and clamped with the bent part of the tension sheet.

[0016] Further, the first body is provided with an inlet and an outlet for the fluid to enter and exit the gear pump.

[0017] The utility model discloses a second aspect discloses a kind of internal meshing gear pumps, the internal meshing gear pump includes the shell as described in first aspect, still include:

[0018] Gear set, the gear set is located inside the shell, the gear set is communicated with the import and export of first body;

[0019] Permanent magnet, the permanent magnet is located inside the shell;

[0020] Rotating shaft, the rotating shaft is located inside the shell, is connected with the gear set and the permanent magnet.

[0021] Due to the use of the above technical solution, the utility model compared with prior art has the following advantages:

[0022] The present application is by setting tensioning piece and bolt at the two ends of first body and second body, and the first body and second body are pulled along the axial direction of shell assembly, and the shell assembly is limited in axial space, to realize the connection and fixed of shell assembly, can reduce the type and quantity of connecting parts during installation, reduce assembly step, not only facilitate disassembly and maintenance, and make the structure of shell more compact, reduce the overall size of gear pump, occupy small space, facilitate installation.

[0023] In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor according to these drawings.

[0025] Figure 1 It is a kind of internal meshing gear pump's sectional view provided by the utility model embodiment;

[0026] Figure 2 It is the structure diagram of tensioning piece provided by the utility model embodiment;

[0027] Figure 3 It is the structure diagram of a kind of internal meshing gear pump provided by the utility model embodiment.

[0028] Reference signs of the above drawings: 1, first body; 2, second body; 3, shell; 4, cover plate; 401, fixed part; 402, inner recess; 5, protrusion; 6, tension piece; 601, body; 602, bending part; 603, extension part; 7, bolt; 8, nut; 9, inlet; 10, outlet; 11, gear set; 12, permanent magnet; 13, rotating shaft. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. In addition, the drawings of the present application are only simple schematic illustrations, not the depiction of actual dimensions, and the prior declaration is made.

[0030] In the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "forward", "backward", "between", "close to", "far away from" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be directly connected, or it can be indirectly connected. For ordinary skilled persons in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0031] It should be understood that although the terms "first", "second", "third" and the like may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items, as appropriate.

[0032] Embodiment one: reference Figures 1-3As shown, the embodiment of the present application provides a housing of an internal gear pump, comprising: a housing assembly and a tensioning assembly, the housing assembly comprises a first body 1 and a second body 2 arranged along the axial direction thereof, the first body 1 is provided with a groove arranged along the radial direction thereof, the tensioning assembly comprises a tensioning sheet 6, the tensioning sheet 6 comprises a body 601 extending along the axial direction of the housing assembly, a connecting portion arranged at the first end of the body 601 and a bending portion 602 extending along the second end of the body 601 in the first direction, the bending portion 602 abuts against the side of the second body 2 away from the first body 1, the connecting portion is inserted into the groove and has a gap with the two sides of the groove arranged along the axial direction of the housing assembly, and the connecting portion is connected with the first body 1 through a bolt 7.

[0033] Through the above structure, the tensioning assembly tensions the first body 1 and the second body 2 along the axial direction of the housing assembly, thereby realizing the connection and fixation between the structures of the housing, reducing the types and quantities of connecting components in the installation process, reducing the assembly steps, facilitating disassembly and maintenance, making the structure of the housing more compact, reducing the overall size of the gear pump, occupying small space, facilitating installation, and being especially suitable for applications with high space requirements, such as vehicles.

[0034] Specifically, as shown in Figure 1 and Figure 3 , the housing is in a cylindrical structure as a whole, the housing assembly comprises the first body 1, the second body 2, the cover plate 4 and the outer shell 3 sleeved on at least part of the first body 1 and the second body 2, the outer shell 3 is located between the first body 1 and the second body 2, the cover plate 4 is located on the side of the second body 2 away from the first body 1, the groove is formed on the first body 1 from the surface of the first body 1 to the inside of the first body 1, when the tensioning sheet 6 is connected with the bolt 7, the first end of the tensioning sheet 6 is inserted into the groove, the second end of the tensioning sheet 6 abuts against the side of the second body 2 away from the first body 1, thereby tensioning the first body 1, the second body 2, the outer shell 3 and the cover plate 4, and realizing the connection and fixation of the first body 1, the second body 2, the outer shell 3 and the cover plate 4. In order to make the connection of the housing assembly more stable, two tensioning assemblies are arranged on the housing assembly in the embodiment of the present application, and the two tensioning assemblies are oppositely arranged on the two sides of the housing assembly.

[0035] The connecting portion of the tensioning sheet 6 and the first body 1 are both provided with through holes, and the bolt 7 passes through the through holes to connect the first end of the tensioning sheet 6 with the first body 1. Among them, the first end of the tensioning sheet 6 always has a gap between the side of the groove in communication with the through hole and the side away from the through hole, and the gap always keeps the tensioning sheet 6 in a tensioned state.

[0036] In the embodiment of the present application, the connecting part of the first end of the tensioning sheet 6 comprises a nut 8, when the tensioning assembly is connected with the shell assembly, the bolt 7 is connected and fixed through the through hole on the shell assembly and the nut 8. In order to keep the stability of the connection between the nut 8 and the tensioning sheet 6, the welding connection between the nut 8 and the tensioning sheet 6 is adopted, which can avoid the interference of the position of the tensioning sheet 6 with the bolt 7 and the nut 8 when they are connected.

[0037] In other possible embodiments, a threaded hole can be arranged on the connecting part of the first end of the tensioning sheet 6, the bolt 7 is connected with the threaded hole through the through hole on the shell assembly, so that the nut is not needed.

[0038] The bending part 602 of the tensioning sheet 6 further comprises an extension part 603 which extends in the second direction along the extension end of the bending part 602, as shown in Figure 1 and Figure 2 The second body 2 is provided with a protrusion 5 which faces away from the first body 1, the protrusion 5 is connected with the bending part 602 of the tensioning sheet 6. The cover plate 4 is arranged on one side of the second body 2, and forms a cavity with the second body 2 for installing other components. In order to be clamped with the tensioning sheet 6, the cover plate 4 is provided with a fixing part 401 and an inner recess part 402, when the tensioning assembly is connected with the shell assembly, the fixing part 401 is located on the protrusion 5 of the second body 2, and abuts against the bending part 602 of the tensioning sheet 6, the extension part 603 abuts against the part of the inner recess part 402 which is in contact with the second body 2, so that the second end of the tensioning sheet 6 is clamped firmly on the cover plate 4 and the second body 2, and the tensioning sheet 6 only needs to be provided with a through hole at the first end to realize the connection and fixation of the tensioning assembly with the shell assembly, so as to further reduce the installation accessories and simplify the assembly process. The first direction is Figure 1 the radial direction of the shell assembly which is parallel to the shell assembly and faces the second body 2, and the second direction is Figure 1 the direction which faces the inner recess part 402.

[0039] Embodiment two: as shown in Figure 1 and Figure 3 The present application further provides an internal gear pump, which comprises the shell as described in the above embodiments, further comprises a gear set 11, a permanent magnet 12 and a rotating shaft 13 which are arranged inside the shell. The first body 1 of the internal gear pump is provided with an inlet 9 and an outlet 10 for fluid to enter and exit, the gear set 11 is in communication with the inlet 9 and the outlet 10 of the first body 1, the rotating shaft 13 is connected with the gear set 11 and the permanent magnet 12, so that the rotating shaft 13 rotates under the drive of the permanent magnet 12, the rotation of the rotating shaft 13 drives the gear set 11 to rotate and mesh or separate, so as to suck and squeeze the fluid. The gear set 11 is an internal gear, which can adopt the existing known involute tooth, circular arc tooth and cycloid tooth, and has strong versatility.

[0040] The principle and implementation mode of the present application are described by using specific examples, and the above examples are only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application, and the above description should not be understood as a limitation on the present application.

Claims

1. A housing for an internal gear pump, characterized by, The application relates to an inner meshing gear pump. The shell assembly comprises a first body and a second body arranged axially, and a groove is arranged radially on the first body. The tensioning assembly comprises a tensioning sheet, which comprises a body extending axially along the shell assembly, a connecting part arranged at a first end of the body, and a bent part extending in a first direction and formed at a second end of the body, the bent part abutting against a side of the second body away from the first body, the connecting part is inserted into the groove and has a gap with two sides of the groove arranged axially along the shell assembly, and the connecting part is connected with the first body through a bolt.

2. A housing for an internal gear pump as set forth in claim 1, wherein The side of the second body away from the first body is provided with a protrusion, and the protrusion is connected with the bent part of the tensioning sheet.

3. A housing for an internal gear pump as set forth in claim 2 wherein, The bent part of the tensioning sheet further comprises an extension part extending in a second direction and formed at an extending end of the bent part, and the second end of the tensioning sheet is clamped with the protrusion through the bent part and the extension part.

4. A housing for an internal gear pump as set forth in claim 1, wherein The connecting part and the first body are both provided with through holes, and the tensioning sheet is connected with the first body through a bolt penetrating through the through holes.

5. A housing for an internal gear pump as claimed in claim 4, wherein The connecting part comprises a nut, and when the tensioning assembly is connected with the shell assembly, the bolt is connected and fixed through the through hole on the first body and the nut.

6. A housing for an internal gear pump according to any one of claims 1 to 5, characterised in that, The shell assembly is provided with at least two tensioning sheets, and at least one end of one tensioning sheet is provided with a through hole.

7. A housing for an internal gear pump as defined in claim 1, wherein The shell of the inner meshing gear pump further comprises a cover plate and a shell sleeved on at least part of the first body and the second body, the shell is located between the first body and the second body, and the cover plate is located on the side of the second body away from the first body.

8. A housing for an internal gear pump as claimed in claim 7, wherein The cover plate has a fixing part and an inner recess, and when the tensioning assembly is connected with the shell assembly, the fixing part is connected on the protrusion of the second body and clamped with the bent part of the tensioning sheet.

9. A housing for an internal gear pump as defined in claim 1, wherein The first body is provided with an inlet and an outlet.

10. An internal gear pump characterized by, The inner meshing gear pump comprises the shell as claimed in any one of claims 1 to 9, and further comprises: a gear set arranged in the shell, the gear set is communicated with the inlet and the outlet of the first body; a permanent magnet arranged in the shell; a rotating shaft arranged in the shell and connected with the gear set and the permanent magnet.

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