Automobile water pump impeller and mounting structure thereof
The impeller mounting structure, which combines auxiliary channels and support columns with an impeller fixing mechanism, mounting drive components, and self-locking components, solves the problem of cumbersome impeller installation and disassembly, and enables fast and accurate impeller installation and disassembly.
Patent Information
- Application Number
- CN202511329749.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-17
- Publication Date
- 2025-12-16
AI Technical Summary
The installation and removal of existing automotive water pump impellers are cumbersome and difficult to synchronize with the water pump cover, resulting in a long disassembly time.
The impeller mounting structure, which combines an auxiliary channel and a support column, along with an impeller fixing mechanism, a mounting drive assembly, and a self-locking assembly, enables convenient installation and simultaneous disassembly of the impeller.
It enables rapid installation and removal of the impeller, ensures accurate installation position, simplifies the operation process, and improves work efficiency.
Smart Images

Figure CN121139480A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of water pump technology, specifically to an automotive water pump impeller and its mounting structure. Background Technology
[0002] The car water pump is a core component of the engine cooling system. It is mainly responsible for driving the coolant to circulate in the system to remove the heat generated by the engine during operation and ensure that the engine operates within the optimal temperature range. In order to meet the requirements of energy conservation and environmental protection, the car water pump uses an energy-saving electric motor to power it. The car water pump drives the liquid to flow through the rotation of the impeller. The impeller is mounted on the shaft, and its installation and removal are relatively troublesome. Moreover, after the impeller has been used for a long time, it is difficult to remove it from the shaft, which requires a lot of time. The installation and removal of the impeller cannot be synchronized with the installation and removal of the water pump cover to achieve convenient installation and removal of the impeller. Summary of the Invention
[0003] The purpose of this invention is to provide an automotive water pump impeller and its mounting structure to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: An automotive water pump impeller includes an impeller body, on which an auxiliary channel and a support post are provided, and the impeller body is conveniently installed through the auxiliary channel and the support post.
[0005] An automotive water pump impeller mounting structure includes a water pump body and a sealed pump sleeve, wherein a rotating shaft is mounted on the water pump body and an impeller bearing assembly is provided on the rotating shaft; The impeller bearing assembly supports and positions the impeller body, and an impeller fixing mechanism is also installed on the impeller bearing assembly to fix the impeller body. The impeller fixing mechanism can also adjust the position of the impeller body during installation to ensure accurate installation of the impeller body. The sealing pump sleeve seals the impeller body, and a mounting drive assembly is installed on the sealing pump sleeve. The impeller is fixed by driving the impeller fixing mechanism through the mounting drive assembly. The mounting drive assembly is also equipped with a self-locking component, which locks the sealing pump sleeve and the mounting drive assembly.
[0006] Preferably, the impeller bearing assembly is a mounting plate, which cooperates with the support pins on the impeller body to support and position the impeller body.
[0007] Preferably, the impeller fixing mechanism includes a drive link, an auxiliary locking plate, and a rotating ring. The drive link is sleeved on the rotating shaft, and the drive link is connected to the auxiliary locking plate to move the auxiliary locking plate.
[0008] Preferably, the auxiliary locking plate is fixedly provided with an auxiliary locking column, which cooperates with the auxiliary channel to assist in fixing the impeller body.
[0009] Preferably, the auxiliary locking column can adjust the position of the impeller body, and the auxiliary locking plate is connected with the rotating ring to drive the rotating ring to move.
[0010] Preferably, the rotating ring cooperates with the supporting insertion column to fix the impeller body.
[0011] Preferably, the installation driving assembly is an operating ring, and a supporting insertion rod is fixedly arranged on the operating ring in a symmetrical manner, and the supporting insertion rod cooperates with the driven link to drive the driven link to move.
[0012] Preferably, a sealing cooperation ring is fixedly arranged on the periphery of the supporting insertion rod, and the sealing cooperation ring can seal the sealing pump sleeve.
[0013] Preferably, the self-locking assembly comprises a movable locking block and a cooperating carrier column, and the movable locking block locks the operating ring.
[0014] Preferably, the cooperating carrier column moves under the driving of the operating ring and cooperates with the water pump body to fix the sealing pump sleeve.
[0015] Compared with the prior art, the present application has the following advantages: 1. When the impeller body is installed, it is positioned on the rotating shaft through the cooperation of the supporting insertion column and the assembly insertion hole, which can avoid the close cooperation between the impeller body and the rotating shaft, and the impeller body can be quickly disassembled from the rotating shaft when disassembling the impeller, and after positioning the impeller body, the sealing pump sleeve can be installed on the water pump body, and the sealing pump sleeve can be fixed at the same time to realize the fixed installation of the impeller body, realize the synchronous installation and disassembly of the two, and facilitate the installation and disassembly operation.
[0016] 2. After the sealing pump sleeve is sleeved on the water pump body 1, the operating ring can be pushed to move, and the driving carrier wheel on the operating ring will be in contact with the driven link as the operating ring moves, so that the operating ring pushes the driven link to move synchronously, and the driven link will also drive the auxiliary locking plate to move as the driven link moves, and the auxiliary locking plate can adjust the position of the impeller body as it moves, ensuring smooth installation, and can assist in fixing the impeller, further ensuring stable installation.
[0017] 3. In addition, the auxiliary locking plate will also drive the rotating ring to rotate when moving, and the installation of the locking ring into the limited ring groove will be achieved by the rotation of the rotating ring, thereby fixing the impeller body. In addition, the operation ring not only can realize automatic locking when moving, but also will drive the matching load column to move, so that the lock position plug-in column on the matching load column is inserted into the interlocking load hole to fix the sealing pump cover. The operation is simple, convenient and fast, and is convenient for the maintenance and repair work of the impeller body in the later period. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a schematic view of the assembly of the water pump body.
[0019] Figure 2 It is a schematic view of the assembly of the water pump body and the impeller body from the first perspective.
[0020] Figure 3 It is a schematic view of the assembly of the water pump body and the impeller body from the second perspective.
[0021] Figure 4 It is Figure 3 It is an enlarged view of position A in FIG. 5.
[0022] Figure 5 It is a schematic view of the cooperation of the water pump body, the impeller body and the operation ring.
[0023] Figure 6 It is Figure 5 It is an enlarged view of position B in FIG. 6.
[0024] Figure 7 It is a schematic view of the assembly of the water pump body.
[0025] Figure 8 It is a schematic view of the structure of the impeller body.
[0026] Figure 9 It is a schematic view of the structure of the water pump body.
[0027] Figure 10 It is a schematic view of the assembly of the sealing pump cover.
[0028] Figure 11 It is Figure 10 It is an enlarged view of position C in FIG. 7.
[0029] Figure 12 It is a schematic view of the structure of the sealing pump cover.
[0030] Figure 13 It is a schematic view of the structure of the operation ring.
[0031] Figure 14 It is a schematic view of the assembly of the driving link, the auxiliary locking plate and the rotating ring.
[0032] In the figure: 1, impeller body; 11, auxiliary channel; 12, support column; 13, limit ring groove; 2, water pump body; 21, connecting ring groove; 22, rotating shaft; 23, mounting carrier plate; 24, limiting carrier block; 25, limiting through hole; 26, assembly socket; 27, hollow sleeve; 28, convex disc; 281, rotating carrier column; 282, limiting plate block; 29, interlocking carrier plate; 291, interlocking carrier hole; 292, guide matching rod; 3, sealing pump sleeve; 31, plug-in ring plate; 32, matching connecting plate; 33, locking socket; 34, connecting through hole; 35, sealing plug slot; 36, inner carrier block; 37, support through hole; 4, operating ring; 41, carrier matching plate; 42, matching bearing hole; 43, sealing matching ring; 44, support plug rod; 45, carrier bottom plate; 46, guide matching hole; 47, drive carrier; 471, drive carrier wheel; 48, matching carrier plate; 481, matching connecting carrier; 49, inclined shift channel; 5, movable locking block; 51, movable locking rod; 52, connecting spring; 6, matching carrier column; 61, connecting channel column; 62, locking plate body; 63, locking plug column; 7, driving connecting ring; 71, sleeve stable ring; 72, carrier matching rod; 73, matching sleeve plate; 74, connecting hinge rod; 8, auxiliary locking plate; 81, auxiliary locking column; 82, adjusting inclined surface; 83, carrier convex block; 84, limiting plug rod; 85, arc-shaped carrier plate; 9, rotating ring; 91, mounting locking ring; 92, matching protrusion; 93, matching guide hole; 94, receiving plate; 95, plug-in guide rod; 96, link strip block. DETAILED DESCRIPTION
[0033] 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. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0034] The present application provides a technical solution: As Figure 8 described, a water pump impeller for automobile includes an impeller body 1, the impeller body 1 is provided with an auxiliary channel 11 and a support column 12, and the impeller body 1 is conveniently installed through the auxiliary channel 11 and the support column 12, and the support column 12 is provided with a limit ring groove 13.
[0035] As Figure 1 and Figure 2As shown, a kind of automobile water pump impeller mounting structure, including water pump body 2 and sealed pump cover 3, water pump body 2 is installed with rotating shaft 22, rotating shaft 22 is provided with impeller bearing assembly, impeller bearing assembly supports and positions impeller body 1, and impeller bearing assembly is also installed with impeller fixing mechanism, the fixation of impeller body 1 is carried out by impeller fixing mechanism, and impeller fixing mechanism can also be adjusted in position when impeller body 1 is installed, guarantee impeller body 1 installation accurate, sealed pump cover 3 seals impeller body 1, and sealing pump cover 3 is installed with installation drive assembly, the fixation of impeller is realized by driving impeller fixing mechanism through installation drive assembly, installation drive assembly is also installed with self-locking assembly, and sealing pump cover 3 and installation drive assembly are locked by self-locking assembly.
[0036] As shown in Figure 5 , Figure 7 , Figure 10 , Figure 11 and Figure 12 As shown, connecting ring groove 21 is set up on water pump body 2, and the both sides of water pump body 2 are also fixed with interlocking carrier plate 29 symmetrically, interlocking carrier plate 29 is provided with interlocking carrier hole 291, and the both sides of water pump body 2 are also fixed with guiding cooperation rod 292 between the two interlocking carrier plates 29, and sealing pump cover 3 is fixed with insertion ring plate 31, when sealing pump cover 3 is installed on water pump body 2, insertion ring plate 31 is inserted in connecting ring groove 21, and sealing pump cover 3 is also fixed with cooperation connecting plate 32 symmetrically, cooperation connecting plate 32 is provided with lock position insertion hole 33, and sealing pump cover 3 is provided with connecting through hole 34 on the side of cooperation connecting plate 32, and sealing insertion groove 35 is also set up on the end face of the outer port of connecting through hole 34, and inner bearing block 36 is fixed in the inside of sealing pump cover 3, and supporting through hole 37 is set up on inner bearing block 36.
[0037] As shown in Figure 9 Impeller bearing assembly is installation carrier plate 23, and installation carrier plate 23 is matched with support insertion column 12 on impeller body 1 to support and position impeller body 1, and limiting block 24 is fixed on installation carrier plate 23 symmetrically, limiting through hole 25 is set up on limiting block 24, and hollow sleeve 27 is also fixed on installation carrier plate 23 between limiting block 24 symmetrically, assembly insertion hole 26 is set up on installation carrier plate 23, assembly insertion hole 26 is matched with support insertion column 12 on impeller body 1, and convex plate 28 is also fixed on installation carrier plate 23, rotating carrier column 281 is fixed on convex plate 28, and limit plate block 282 is fixed on rotating carrier column 281.
[0038] As shown in Figure 2 and Figure 14As shown, the impeller fixing mechanism comprises a driving link 7, an auxiliary locking plate 8 and a rotating ring 9. The driving link 7 is sleeved on the rotating shaft 22. The driving link 7 is connected with the auxiliary locking plate 8 to drive the auxiliary locking plate 8 to move. The driving link 7 is fixedly provided with a sleeved stabilizing ring 71. The sleeved stabilizing ring 71 is sleeved on the rotating shaft 22. Symmetrical bearing matching rods 72 are fixedly arranged on the driving link 7. The bearing matching rods 72 are fixedly provided with matching sleeve plates 73. The matching sleeve plates 73 are inserted into the hollow sleeve 27 and tightly match with the inner wall of the hollow sleeve 27. The driving link 7 is further hingedly connected with a connecting hinge rod 74. The other end of the connecting hinge rod 74 is hingedly connected with the auxiliary locking plate 8.
[0039] As shown in Figure 5 , Figure 7 and Figure 14 , the auxiliary locking plate 8 is fixedly provided with an auxiliary locking column 81. The auxiliary locking column 81 cooperates with the auxiliary channel 11 to assist in fixing the impeller body 1. That is, the auxiliary locking column 81 is inserted into the auxiliary channel 11 to lock the impeller body 1.
[0040] As shown in Figure 3 , Figure 4 , Figure 7 and Figure 14 , the auxiliary locking column 81 can adjust the position of the impeller body 1. The auxiliary locking plate 8 is connected with the rotating ring 9 to drive the rotating ring 9 to move. The rotating ring 9 cooperates with the supporting insertion column 12 to fix the impeller body 1. The auxiliary locking column 81 is provided with an adjusting inclined surface 82. If the impeller body 1 does not tightly contact with the mounting carrier plate 23 during the process of inserting the auxiliary locking column 81 into the auxiliary channel 11, the adjusting inclined surface 82 will contact with the inner wall of the auxiliary channel 11. Thus, the impeller body 1 will be pushed to move to tightly contact with the mounting carrier plate 23 under the action of the adjusting inclined surface 82, so as to ensure the accuracy of the mounting position. The auxiliary locking plate 8 is further fixedly provided with a bearing protrusion 83. The bearing protrusion 83 is fixedly provided with a limiting insertion rod 84. The limiting insertion rod 84 is inserted into the limiting through hole 25. The bearing protrusion 83 is further fixedly provided with symmetrical arc-shaped bearing plates 85. The rotating ring 9 is sleeved on the rotating carrier column 281 and is limited by the limiting plate block 282. The rotating ring 9 is fixedly provided with a mounting locking ring 91. The mounting locking ring 91 is inserted into the limiting ring groove 13 when fixing the impeller body 1. The mounting locking ring 91 is further fixedly provided with symmetrical matching protrusions 92. The matching protrusions 92 are provided with matching guide holes 93. The mounting locking ring 91 is movably provided with a bearing plate 94. The bearing plate 94 is fixedly provided with symmetrical insertion guide rods 95. The insertion guide rods 95 are inserted into the matching guide holes 93. The bearing plate 94 is further fixedly provided with a connecting strip block 96. The connecting strip block 96 is hingedly connected with the arc-shaped bearing plate 85.
[0041] As shown in Figure 1 , Figure 6 ,Figure 10 and Figure 13 As shown in the figure, the installation driving assembly is an operating ring 4, and a support plug rod 44 is symmetrically and fixedly arranged on the operating ring 4. The support plug rod 44 cooperates with the driving link 7 to push the driving link 7 to move. A sealing cooperation ring 43 is fixedly arranged on the periphery of the support plug rod 44. The sealing cooperation ring 43 can seal the sealing pump sleeve 3. That is, when the sealing cooperation ring 43 seals the sealing pump sleeve 3, it is inserted into the sealing slot 35. Bearing cooperation plates 41 are symmetrically and fixedly arranged on both sides of the operating ring 4. The bearing cooperation plates 41 are provided with cooperation bearing holes 42. The support plug rod 44 is inserted into the connecting through hole 34. A bearing bottom plate 45 is fixedly arranged on the support plug rod 44. The bearing bottom plate 45 is provided with a guide cooperation hole 46 extending to the support plug rod 44. When the sealing pump sleeve 3 is installed on the water pump body 2, a guide cooperation rod 292 is inserted into the guide cooperation hole 46. A driving carrier 47 is fixedly arranged on the bearing bottom plate 45. Driving carrier wheels 471 are installed on the driving carrier 47. The driving carrier wheels 471 are in contact with the driving link 7. A cooperation bearing plate 48 is also fixedly arranged on the bearing bottom plate 45. Cooperation link carriers 481 are fixedly arranged on the cooperation bearing plate 48. The cooperation link carriers 481 are provided with inclined shift channels 49.
[0042] As shown in the figure, Figure 6 , Figure 10 and Figure 11 The self-locking assembly includes a movable lock block 5 and a cooperation carrier column 6. The movable lock block 5 locks the operating ring 4. The cooperation carrier column 6 moves under the driving of the operating ring 4 and cooperates with the water pump body 2 to fix the sealing pump sleeve 3. A movable lock rod 51 is fixedly arranged on the movable lock block 5. The movable lock rod 51 is inserted into the cooperation bearing hole 42. A connecting spring 52 is sleeved on the movable lock rod 51. The two ends of the connecting spring 52 are fixedly arranged on the movable lock block 5 and the bearing cooperation plate 41 respectively. When the movable lock rod 51 fixes the operating ring 4, it is inserted into the lock position insertion hole 33. The cooperation carrier column 6 is inserted into the support through hole 37. One end of the cooperation carrier column 6 is symmetrically and fixedly provided with a connecting channel column 61. The connecting channel column 61 is inserted into the inclined shift channel 49 and in contact with the inner wall of the inclined shift channel 49. The other end of the cooperation carrier column 6 is fixedly provided with a lock plate body 62. The lock plate body 62 is fixedly provided with a lock insertion column 63. When the lock insertion column 63 fixes the sealing pump sleeve 3, it is inserted into the interlocking carrier hole 291.
[0043] When the impeller body 1 is positioned on the rotating shaft 22 by the cooperation of the support column 12 and the assembly hole 26 during the installation of the impeller body 1, the close cooperation between the impeller body 1 and the rotating shaft 22 can be avoided, and after the impeller body 1 is positioned, the sealing pump sleeve 3 can be installed on the water pump body 2. During the installation, the guide fitting hole 46 is sleeved on the guide fitting rod 292 to limit the sealing pump sleeve 3, and the movable locking rod 51 is abutted on the cooperating connecting plate 32, and the connecting spring 52 is in a stretched state at this time. After the sealing pump sleeve 3 is installed, the operating ring 4 can be pushed to move, so that the driving carrier wheel 471 on the operating ring 4 is in contact with the driving connecting ring 7. Thus, under the action of the driving carrier wheel 471, the driving connecting ring 7 is pushed to move away from the installation carrier disc 23 until the movable locking rod 51 is aligned with the locking hole 33. At this time, under the action of the connecting spring 52, the movable locking rod 51 is inserted into the locking hole 33, so that the operating ring 4 is fixed. In this process, with the movement of the driving connecting ring 7, the cooperating sleeve plate 73 is also moved, and under the action of the cooperating sleeve plate 73, negative pressure can be generated in the hollow sleeve 27 to generate a back pulling force on the driving connecting ring 7, so that the driving connecting ring 7 is conveniently reset when the impeller body 1 is disassembled. With the movement of the driving connecting ring 7, the auxiliary locking plate 8 is also moved under the action of the connecting hinge 74, so that the auxiliary locking column 81 on the auxiliary locking plate 8 is inserted into the auxiliary channel 11, and the impeller body 1 is auxiliary locked. In addition, the auxiliary locking column 81 can adjust the position of the impeller body 1 during the insertion process to ensure the accuracy of the installation position. In addition, when the auxiliary locking plate 8 moves, the receiving plate 94 is moved, and the rotating ring 9 is rotated under the action of the receiving plate 94. With the rotation of the rotating ring 9, the installation locking ring 91 on the rotating ring 9 is rotated and inserted into the limiting ring groove 13, so that the impeller body 1 is fixed and stably installed. Through the contact between the driving carrier wheel 471 and the driving connecting ring 7, the rotating shaft 22 will not be affected when it rotates. When the operating ring 4 moves, the cooperating carrier column 6 is also moved under the cooperation of the inclined movement channel 49 and the connecting channel column 61, so that the locking column 63 on the cooperating carrier column 6 is inserted into the interlocking carrier hole 291 on the water pump body 2. Through the cooperation of the locking column 63 and the interlocking carrier hole 291, the sealing pump sleeve 3 is fixed. The entire installation process of the impeller body 1 is very convenient and fast, and the fixation of the impeller body 1 and the fixation of the sealing pump sleeve 3 can be synchronized, achieving two goals at once, greatly improving the work efficiency of the installation of the impeller body 1 and facilitating the work of the staff. In addition, when the impeller body 1 is disassembled, the operating ring 4 is in an unlocked state by pulling the movable locking block 5 to make the movable locking rod 51 on the movable locking block 5 exit the locking hole 33. Thus, under the action of negative pressure, the driving connecting ring 7 is pulled to reset, and the operating ring 4 is pushed to reset under the action of the driving connecting ring 7.With the reset of the operating ring 4, the matching carrier column 6 will be reset, so that the sealing pump cover 3 is in the unlocked state, and with the reset of the driving link 7, the auxiliary lock plate 8 will also be reset, and then the auxiliary lock column 81 will exit the auxiliary channel 11, and the reset of the auxiliary lock plate 8 will also drive the rotary ring 9 to rotate in the opposite direction, so that the mounting lock ring 91 on the rotary ring 9 exits the limiting ring groove 13, so that the impeller body 1 is in the unlocked state, and the impeller body 1 can be quickly disassembled, which is simple and fast.
[0044] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An impeller for an automotive water pump, comprising an impeller body, characterized in that: The impeller body is provided with an auxiliary channel and a support post, and the impeller body can be easily installed through the auxiliary channel and the support post.
2. A car water pump impeller mounting structure, characterized in that: The mounting structure is used to install the water pump impeller as described in claim 1, including a water pump body and a sealed pump sleeve, wherein a rotating shaft is mounted on the water pump body, and an impeller bearing assembly is provided on the rotating shaft; The impeller bearing assembly supports and positions the impeller body, and an impeller fixing mechanism is also installed on the impeller bearing assembly to fix the impeller body. The impeller fixing mechanism can also adjust the position of the impeller body during installation to ensure accurate installation of the impeller body. The sealing pump sleeve seals the impeller body, and a mounting drive assembly is installed on the sealing pump sleeve. The impeller is fixed by driving the impeller fixing mechanism through the mounting drive assembly. The mounting drive assembly is also equipped with a self-locking component, which locks the sealing pump sleeve and the mounting drive assembly.
3. The automotive water pump impeller mounting structure according to claim 2, characterized in that: The impeller bearing assembly is a mounting plate, which cooperates with the support pins on the impeller body to support and position the impeller body.
4. The automotive water pump impeller mounting structure according to claim 3, characterized in that: The impeller fixing mechanism includes a drive link, an auxiliary locking plate, and a rotating ring. The drive link is sleeved on the rotating shaft and is connected to the auxiliary locking plate to move the auxiliary locking plate.
5. The automotive water pump impeller mounting structure according to claim 4, characterized in that: An auxiliary locking pin is fixedly installed on the auxiliary locking plate, and the auxiliary locking pin cooperates with the auxiliary channel to assist in fixing the impeller body.
6. The automotive water pump impeller mounting structure according to claim 5, characterized in that: The auxiliary locking pin can adjust the position of the impeller body. The auxiliary locking plate is connected to the rotating ring and drives the rotating ring to move.
7. The automotive water pump impeller mounting structure according to claim 6, characterized in that: The rotating ring cooperates with the support post to fix the impeller body.
8. The automotive water pump impeller mounting structure according to claim 7, characterized in that: The installation drive component is an operating ring, on which symmetrical support rods are fixedly installed. The support rods cooperate with the drive linkage to push the drive linkage to move.
9. The automotive water pump impeller mounting structure according to claim 8, characterized in that: A sealing ring is fixedly provided on the periphery of the support rod, and the sealing ring can seal the pump sleeve.
10. The automotive water pump impeller mounting structure according to claim 9, characterized in that: The self-locking assembly includes a movable locking block and a mating support column, wherein the movable locking block locks the operating ring.
11. The automotive water pump impeller mounting structure according to claim 10, characterized in that: The cooperating support column moves under the drive of the operating ring and cooperates with the water pump body to fix the sealing pump sleeve.