A range extender water pump for a tractor

Abstract

The utility model discloses a tractor is with range extender water pump, including water pump body and water pump seat, water pump seat includes integrative water pump cover and water pump seat body, and water pump body is fixedly connected with water pump cover through connecting piece, and the inside of water pump body and water pump cover is jointly enclosed and is equipped with the installation cavity for installing the impeller, water pump seat body includes first connecting block, second connecting block and third connecting block, first connecting block is protruding in water pump cover right end surface, and first connecting block vertical setting, second connecting block is protruding in first connecting block front side, and second connecting block horizontal setting, and perpendicular to first connecting block, third connecting block is protruding in second connecting block left side, and third connecting block vertical setting, and perpendicular to first connecting block and second connecting block, first connecting block, second connecting block and third connecting block are connected with the convex portion of cylinder body, oil pan upper end face and oil pan left side through connecting piece respectively, the water pump of the application can reduce the stress concentration of connecting part, and the stability of water pump operation is promoted.

Description

Technical Field

[0001] This utility model relates to the field of engine component technology, and in particular to a water pump for a tractor range extender. Background Technology

[0002] In the tractor industry, the range extender is a key device for improving range and power output stability, and the efficient operation of its cooling system directly affects the overall performance of the machine. The range extender water pump, as the core power component of the cooling system, needs to continuously drive the coolant to cool the motor and its controller, maintaining all components of the range extender within their optimal operating temperature range. Currently, the installation and connection of tractor range extender water pumps mostly adopt a split structure design, where the pump body and the bracket used for fixing are independent components, joined together by bolts, and then connected to basic components such as the cylinder block and oil pan. While this design meets basic assembly requirements, structural defects have gradually become apparent during long-term operation.

[0003] The existing split-type connection structure has significant shortcomings. The processing of the independent bracket and the water pump body requires the formulation of separate process standards, which not only increases the complexity of parts production and manufacturing costs, but also makes the assembly process cumbersome due to the splicing of multiple parts. Multiple positioning and calibration are required to ensure connection accuracy, which significantly reduces production and assembly efficiency. The split structure has more connection nodes. In the high-frequency vibration environment of the tractor, the connection parts are prone to loosening due to stress concentration, which leads to a decrease in the stability of water pump operation and may even cause failures such as coolant leakage. The decentralized layout design results in a low spatial matching degree between the water pump and surrounding components. More installation gaps need to be reserved to avoid interference, which is difficult to adapt to the compact engine compartment layout requirements of the tractor and limits the integrated design of the whole structure.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0005] The purpose of this invention is to provide a water pump for a tractor range extender, which can effectively reduce stress concentration at connection points, reduce the risk of loosening, improve the stability and reliability of water pump operation, and extend service life.

[0006] Therefore, this utility model proposes a water pump for a tractor range extender.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A tractor range extender water pump includes a pump body and a pump base. The pump base includes an integrally formed pump cover and a pump base body. The pump body and the pump cover are fixedly connected by a connector. The pump body and the pump cover together enclose a mounting cavity for mounting an impeller. The pump base body includes a first connecting block, a second connecting block, and a third connecting block. The first connecting block protrudes from the right end face of the pump cover and is vertically positioned. The second connecting block protrudes from the front side of the first connecting block and is horizontally positioned and perpendicular to the first connecting block. The third connecting block protrudes from the left side of the second connecting block and is vertically positioned and perpendicular to both the first and second connecting blocks. The first, second, and third connecting blocks are respectively connected to the cylinder block, the upper end face of the oil pan, and the protrusion on the left side of the oil pan via connectors.

[0009] Preferably, the first connecting block has two first connecting posts in the middle, with a vertical gap between the two first connecting posts; the right end of the first connecting block has two second connecting posts, with a vertical gap between the two second connecting posts, and a connector is used to pass through the first and second connecting posts to fix the first connecting block to the cylinder body.

[0010] Preferably, the second connecting block is disposed between the first connecting post and the second connecting post.

[0011] Preferably, the third connecting block is disposed below the first connecting post.

[0012] Preferably, a first reinforcing rib is provided between the water pump cover and the first connecting column.

[0013] Preferably, a second reinforcing rib is provided between the first connecting column and the second connecting column.

[0014] Preferably, the system further includes an impeller, a pump shaft, and a shaft-connecting bearing. The pump shaft is horizontally traversing the pump body. The impeller is located at the end of the pump shaft and within the mounting cavity. The shaft-connecting bearing is sleeved on the end of the pump shaft away from the impeller. The inner ring of the shaft-connecting bearing is interference-fitted with the pump shaft, and the outer ring of the shaft-connecting bearing is fixed to the pump body.

[0015] Preferably, a water seal is provided on the pump shaft and at the end of the shaft-connecting bearing near the impeller. The water seal includes a groove and a stationary ring. The groove is formed on the outer periphery of the pump shaft between the stationary ring and the shaft-connecting bearing. The groove is filled with grease.

[0016] Preferably, the system further includes an inlet and an outlet. The outlet is disposed on the pump body and its opening direction is directed away from the pump base. The inlet is disposed on the pump base and its opening direction is directed away from the pump body.

[0017] Preferably, a water pump pulley is provided at the end of the water pump body away from the water pump base. The water pump pulley is located to the right of the crankshaft pulley and below the generator pulley. The water pump pulley, crankshaft pulley, and generator pulley form a pulley system, which is tensioned and driven by belts.

[0018] The beneficial effects of this utility model compared with the prior art include:

[0019] 1. The water pump of this application adopts an integrated design of water pump cover and water pump base body, which reduces the use of independent brackets in traditional split structure, significantly reduces the number of parts, and reduces the process cost and material cost of multi-part processing.

[0020] 2. The first connecting block, the second connecting block, and the third connecting block integrally formed with the water pump cover in this application eliminate the splicing gap of the traditional split bracket, enhance the rigidity and vibration resistance of the overall structure, effectively reduce stress concentration at the connection points in the high-frequency vibration operating environment of the tractor, reduce the risk of loosening, improve the stability and reliability of the water pump operation, and extend its service life.

[0021] 3. The three connecting blocks of this application are arranged in a multi-directional spatial layout (the first connecting block is vertically set, the second connecting block is horizontal and perpendicular to the first connecting block, and the third connecting block is perpendicular to the first two), forming a multi-point and multi-directional fixed support for the water pump. This can distribute the load and vibration stress generated by the water pump during operation to multiple stress points such as the cylinder block, the upper end face of the oil pan, and the left convex part of the oil pan. This avoids the deformation and breakage of the bracket due to excessive local stress at traditional single or a few fixed points, significantly improving the stability of the water pump installation, preventing problems such as water pump displacement and abnormal noise caused by loose fixing, and ensuring the long-term stable operation of the cooling system. Attached Figure Description

[0022] Figure 1 This is a first structural schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 2 This is a second structural schematic diagram of a specific embodiment of the present utility model.

[0024] Figure 3 This is a specific embodiment of the present utility model. Figure 2 A sectional view cut along the CC axis.

[0025] Figure 4 This is a third structural schematic diagram of a specific embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached drawings: 01-Water pump body; 02-Water pump base; 021-Water pump cover; 022-Water pump base body; 0221-First connecting block; 0222-Second connecting block; 0223-Third connecting block; 0224-First connecting post; 0225-Second connecting post; 023-First reinforcing rib; 024-Second reinforcing rib; 03-Mounting cavity; 04-Cylinder body; 05-Oil pan; 051-Protrusion; 06-Impeller; 07-Water pump shaft; 08-Shaft bearing; 09-Water seal; 091-Groove; 092-Stationary ring; 10-Water inlet; 11-Water outlet; 12-Water pump pulley; 13-Crankshaft pulley; 14-Generator pulley; 15-Belt; 16-Sealing ring. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0028] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0029] A tractor range extender water pump, such as Figures 1-4 As shown, the pump includes a pump body 01 and a pump base 02. The pump base 02 includes an integrally formed pump cover 021 and a pump base body 022. The pump body 01 and the pump cover 021 are fixedly connected by a connector. The pump body 01 and the pump cover 021 together enclose a mounting cavity 03 for mounting an impeller. The pump base body 022 includes a first connecting block 0221, a second connecting block 0222, and a third connecting block 0223. The first connecting block 0221 protrudes from the right end face of the pump cover 021 and is vertically arranged. The second connecting block 0222 protrudes from the right end face of the pump cover 021. The first connecting block 0221 is located in front of the second connecting block 0222, which is horizontally positioned and perpendicular to the first connecting block 0221. The third connecting block 0223 protrudes from the left side of the second connecting block 0222 and is vertically positioned, perpendicular to both the first connecting block 0221 and the second connecting block 0222. The first connecting block 0221, the second connecting block 0222, and the third connecting block 0223 are connected to the cylinder block 04, the upper surface of the oil pan 05, and the protrusion 051 on the left side of the oil pan 05, respectively, via connectors. The left side of the oil pan 05 is located at the front end of the engine.

[0030] The aforementioned water pump adopts an integrated design of the pump cover 021 and the pump base body 022, reducing the use of independent supports in traditional split structures, significantly reducing the number of parts, and lowering the processing and material costs of multi-part manufacturing. The first connecting block 0221, the second connecting block 0222, and the third connecting block 0223, which are integrally formed with the pump cover 021, eliminate the splicing gaps of traditional split supports, enhance the rigidity and vibration resistance of the overall structure, effectively reduce stress concentration at the connection points in the high-frequency vibration operating environment of tractors, reduce the risk of loosening, improve the stability and reliability of water pump operation, and extend service life. The three connecting blocks are arranged in a multi-directional spatial layout (the first connecting block 0221 is set vertically, the second connecting block 0222 is horizontal and perpendicular to the first connecting block 0221, and the third connecting block 0223 is perpendicular to the first two), forming a multi-point and multi-directional fixed support for the water pump. This can distribute the load and vibration stress generated by the water pump during operation to multiple stress points, including the cylinder block 04, the upper end face of the oil pan 05, and the left convex part 051 of the oil pan 05. This avoids the deformation and breakage of the bracket due to excessive local stress at traditional single or a few fixed points, significantly improving the stability of the water pump installation, preventing problems such as water pump displacement and abnormal noise caused by loose fixing, and ensuring the long-term stable operation of the cooling system.

[0031] In some examples of this embodiment, such as Figure 4 As shown, the first connecting block 0221 has two first connecting posts 0224 in the middle, with a vertical spacing between them; the first connecting block 0221 also has two second connecting posts 0225 on its right side, with a vertical spacing between them. A connector passes through the first connecting posts 0224 and the second connecting posts 0225 to fix the first connecting block 0221 to the cylinder body 04. The first connecting block 0221 forms a four-point connection structure through the two vertically spaced first connecting posts 0224 in the middle and the two vertically spaced second connecting posts 0225 on the right side. This structure can evenly distribute the force generated by the vibration load during the operation of the water pump, avoiding deformation and breakage of the connection parts due to local stress concentration. It is suitable for the high-frequency vibration operating environment of the tractor and extends the service life of the connection structure.

[0032] In some examples of this embodiment, such as Figure 4As shown, the second connecting block 0222 is disposed between the first connecting post 0224 and the second connecting post 0225. The placement of the second connecting block 0222 between the first connecting post 0224 and the second connecting post 0225 allows the supporting force of the second connecting block 0222 (connecting to the upper surface of the oil pan 05) to be directly transmitted to the connecting posts on both sides, forming a "central support, two-sided dispersion" force path. This avoids localized deformation of the second connecting block 0222 due to independent force. Simultaneously, this layout eliminates the need for additional installation space on the first connecting block 0221, making the structure of the first connecting block 0221 more compact and better suited to the limited installation area within the tractor's engine compartment, reducing interference with surrounding components (such as oil pipes and wiring harnesses).

[0033] In some examples of this embodiment, such as Figure 4 As shown, the third connecting block 0223 is located below the first connecting column 0224. The third connecting block 0223, positioned below the first connecting column 0224, forms a "vertical coordinated support" with the first connecting column 0224 in the vertical direction. This effectively resists vertical vibrations generated during pump operation (such as the vertical impact of a tractor bumping), preventing the first connecting block 0221 from tilting due to vertical force imbalance. Simultaneously, the connection between the third connecting block 0223 and the left-side protrusion 051 of the oil pan 05 further supplements the horizontal support points, creating a "vertical + horizontal" three-dimensional stable structure for the entire pump installation, thus improving the pump's positional accuracy under complex operating conditions.

[0034] In some examples of this embodiment, such as Figure 4 As shown, a first reinforcing rib 023 is provided between the water pump cover 021 and the first connecting post 0224. The first reinforcing rib 023 is fixedly connected to both the water pump cover 021 and the first connecting post 0224 to enhance the connection strength between them. Specifically, a second reinforcing rib 024 can also be provided between the first connecting post 0224 and the second connecting post 0225. The second reinforcing rib 024 is fixedly connected to both the first connecting post 0224 and the second connecting post 0225 to enhance the connection strength between them.

[0035] In some examples of this embodiment, such as Figure 1 and 3As shown, the system also includes an impeller 06, a pump shaft 07, and a shaft-connecting bearing 08. The pump shaft 07 is horizontally traversing the pump body 01. The impeller 06 is located at the end of the pump shaft 07 and is housed within the mounting cavity 03. The shaft-connecting bearing 08 is sleeved on the end of the pump shaft 07 away from the impeller 06. The inner ring of the shaft-connecting bearing 08 is interference-fitted with the pump shaft 07, and the outer ring of the shaft-connecting bearing 08 is fixed to the pump body 01. The connection between the pump body 01 and the pump shaft 07 using the shaft-connecting bearing 08 significantly reduces the coefficient of friction between them, reduces energy loss during power transmission, improves the pump's driving efficiency, and thus reduces the additional energy consumption of the range extender. Simultaneously, the shaft-connecting bearing 08 can effectively withstand the radial and axial loads generated when the pump shaft 07 rotates, preventing increased wear caused by direct contact between the pump body 01 and the pump shaft 07, and extending the service life of both. The bearing connection method can ensure the coaxiality and rotational accuracy of the water pump shaft 07 when it rotates at high speed, reduce the coolant delivery pulsation caused by shaft shaking, and ensure stable flow output of the cooling system. In addition, the rolling friction characteristics of the shaft bearing 08 can reduce the noise and vibration of the water pump during operation, and work synergistically with the anti-vibration structure of the water pump base 02 to further improve the smoothness of the range extender operation.

[0036] Specifically, such as Figure 1 and 3 As shown, a water seal 09 is provided on the water pump shaft 07 and at the end of the shaft-connecting bearing 08 near the impeller 06. The water seal 09 includes a groove 091 and a stationary ring 092. The groove 091 is formed between the stationary ring 092 and the shaft-connecting bearing 08, on the outer periphery of the water pump shaft 07. The groove 091 is filled with grease. The water seal 09, located at the end of the shaft-connecting bearing 08 near the impeller 06, can precisely block the coolant in the mounting cavity 03 from seeping into the shaft-connecting bearing 08, avoiding wear and jamming caused by coolant corrosion of the bearing. At the same time, the grease filling the groove 091 of the water seal 09 can form a lubricating film between the stationary ring 092 and the water pump shaft 07, reducing frictional loss and extending the service life of the water seal 09. In addition, the grease can also play an auxiliary sealing role, further improving the sealing reliability of the water seal 09 and ensuring the long-term stable operation of the water pump shaft 07 system and the shaft-connecting bearing 08.

[0037] Specifically, such as Figures 1-4As shown, it also includes an inlet 10 and an outlet 11. The outlet 11 is disposed on the water pump body 01, and its opening direction is arranged away from the water pump base 02. The inlet 10 is disposed on the water pump base 02, and its opening direction is arranged away from the water pump body 01. The tractor range extender generates a large amount of heat during high-load operation (such as climbing hills or heavy-load traction), but its optimal operating temperature is lower than that of the internal combustion engine. Introducing pre-cooled coolant through the independent inlet 10 avoids mixing with the coolant in the high-temperature circuit of the internal combustion engine, thus preventing it from affecting heat dissipation efficiency, while simultaneously meeting the precise temperature control requirements of the electric drive system. Specifically, as... Figure 3 As shown, a sealing ring 16 is also provided between the water pump body 01 and the water pump base 02.

[0038] Specifically, such as Figures 1-4 As shown, a water pump pulley 12 is provided at one end of the water pump body 01 away from the water pump seat 02. The water pump pulley 12 is located to the right of the crankshaft pulley 13 and below the generator pulley 14. The water pump pulley 12, the crankshaft pulley 13 and the generator pulley 14 form a pulley system, which is tensioned and driven by a belt 15.

[0039] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0040] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. A range extender water pump for a tractor, characterized by: The system includes a pump body and a pump base. The pump base comprises an integrally formed pump cover and a pump base body. The pump body and the pump cover are fixedly connected by a connector. The pump body and the pump cover together enclose a mounting cavity for mounting an impeller. The pump base body includes a first connecting block, a second connecting block, and a third connecting block. The first connecting block protrudes from the right end face of the pump cover and is vertically arranged. The second connecting block protrudes from the front side of the first connecting block and is horizontally arranged and perpendicular to the first connecting block. The third connecting block protrudes from the left side of the second connecting block and is vertically arranged and perpendicular to both the first and second connecting blocks. The first, second, and third connecting blocks are respectively connected to the cylinder block, the upper end face of the oil pan, and the protrusion on the left side of the oil pan via connectors.

2. The tractor range extender water pump according to claim 1, characterized in that: The first connecting block has two first connecting posts in the middle, with a vertical gap between the two first connecting posts; the right end of the first connecting block has two second connecting posts, with a vertical gap between the two second connecting posts. A connector is used to pass through the first and second connecting posts to fix the first connecting block to the cylinder body.

3. The tractor range extender water pump according to claim 2, characterized in that: The second connecting block is disposed between the first connecting post and the second connecting post.

4. The tractor range extender water pump according to claim 2, characterized in that: The third connecting block is located below the first connecting post.

5. The tractor range extender water pump according to claim 2, characterized in that: A first reinforcing rib is provided between the water pump cover and the first connecting column.

6. The tractor range extender water pump according to claim 2, characterized in that: A second reinforcing rib is provided between the first connecting column and the second connecting column.

7. The tractor range extender water pump according to claim 1, characterized in that: It also includes an impeller, a pump shaft, and a shaft-connecting bearing. The pump shaft is arranged horizontally through the pump body. The impeller is located at the end of the pump shaft and is located in the mounting cavity. The shaft-connecting bearing is sleeved on the end of the pump shaft away from the impeller. The inner ring of the shaft-connecting bearing is interference-fitted with the pump shaft, and the outer ring of the shaft-connecting bearing is fixed to the pump body.

8. The tractor range extender water pump according to claim 7, characterized in that: A water seal is provided on the water pump shaft and at the end of the shaft-connecting bearing near the impeller. The water seal includes a groove and a stationary ring. The groove is formed between the stationary ring and the shaft-connecting bearing, on the outer periphery of the water pump shaft. The groove is filled with grease.

9. The tractor range extender water pump according to claim 1, characterized in that: It also includes an inlet and an outlet. The outlet is located on the pump body and its opening direction is directed away from the pump base. The inlet is located on the pump base and its opening direction is directed away from the pump body.

10. The tractor range extender water pump according to claim 1, characterized in that: A water pump pulley is provided at the end of the water pump body away from the water pump base. The water pump pulley is located to the right of the crankshaft pulley and below the generator pulley. The water pump pulley, crankshaft pulley and generator pulley form a pulley system, which is tensioned and driven by belts.

Images