Water pump structure of engine

Abstract

The invention relates to a water pump structure of an engine. The engine is at least provided with a cylinder body, a cylinder head set assembled on the cylinder body and a water pump assembly assembled on the cylinder head set. The cylinder head group is provided with a cylinder head and a cylinder head cover covering the cylinder head, and the cylinder head is provided with a cooling water inlet; the cylinder head set is provided with a containing space, a cam shaft supporting seat is installed in the containing space, a cam shaft is installed on the cam shaft supporting seat, a water pump installation hole is formed in one side of the cylinder head, and the water pump assembly is installed on the water pump installation hole. The water pump assembly is at least provided with a cooling water output part; one end of the cooling water output part is inserted into the cooling water inlet of the cylinder head; therefore, the convenience of connection between the water pump assembly and the cylinder head can be improved, and the connection positioning effect can be improved.

Description

Technical Field

[0001] The present invention relates to a water pump structure of an engine, and more particularly to a water pump structure of an engine which can improve the convenience of connecting the water pump assembly and the cylinder head and improve the connection positioning effect. Background Art

[0002] In the technical field of water-cooled internal combustion engines, a water pump for cooling the engine is installed on one side of the engine, such as CN110126949 B. In order to stably position the water pump on the engine (cylinder head), two positioning bosses are provided on the water pump, and two corresponding positioning holes are provided on the engine. The positioning bosses of the water pump are inserted into the positioning holes of the engine, so that the water pump can be more correctly positioned when connected to the engine.

[0003] The above-mentioned known technology is to process and set two positioning bosses on the water pump and process and set positioning holes corresponding to the positioning bosses on the engine so that the water pump can be positioned more accurately when connected to the engine. As is well known, the processed parts have error values, so there are error values ​​between the positioning bosses and the positioning holes respectively, which will cause deviations in the positioning of the connection between the water pump and the engine. In severe cases, the eccentric tool of the water pump will be driven by the cam shaft provided in the engine and deflected, thereby causing damage to the water pump.

[0004] Therefore, providing an engine water pump structure to solve the disadvantage that the positioning of the existing water pump connected to the engine is prone to deviation has become an urgent issue to be solved by vehicle manufacturers. Summary of the invention

[0005] [Problems to be solved by the invention]

[0006] The main purpose of the present invention is to provide a water pump structure for an engine, thereby overcoming the shortcomings of the existing water pump assembly and the cylinder head being difficult to connect and having poor positioning performance during the connection.

[0007] [Technical means to solve the problem]

[0008] To this end, some technical means of the present invention are to provide a water pump structure of an engine, the engine at least has a cylinder body, a cylinder head group assembled on the cylinder body, and a water pump assembly assembled on the cylinder head group; the cylinder head group has a cylinder head and a cylinder head cover arranged on the cylinder head, the cylinder head has a cooling water inlet; the cylinder head group has an accommodating space, a camshaft support seat is installed in the accommodating space, the camshaft support seat is installed with a camshaft, a water pump mounting hole is provided on one side of the cylinder head, and the water pump assembly is installed on the water pump mounting hole; the water pump assembly includes a water pump body, a water pump shaft pivotally arranged on the water pump body and linked to the camshaft, an impeller away from the camshaft and connected to the water pump shaft, a water pump outer cover that can cover the impeller and is combined with the water pump body, and a cooling water output portion extended by the water pump body and the water pump outer cover; one end of the cooling water output portion is plugged into the cooling water inlet of the cylinder head.

[0009] To this end, some technical means of the present invention are to provide an engine water pump structure, wherein one side of the water pump body has an outer mounting seat portion, an inner mounting seat portion, and a limiting portion adjacent to the outer mounting portion; the outer mounting portion can be inserted into the water pump mounting hole.

[0010] To this end, some technical means of the present invention are to provide a water pump structure for an engine, wherein a flange portion is protruded outwardly from the water pump mounting hole; and the limiting portion can abut against the flange portion.

[0011] To this end, some technical means of the present invention are to provide an engine water pump structure, wherein a sealing ring is disposed between the outer mounting seat and the water pump mounting hole; the sealing ring is sleeved in the groove of the outer mounting portion or embedded in the water pump mounting hole.

[0012] To this end, some technical means of the present invention are to provide a water pump structure of an engine, wherein the outer mounting seat portion and the limiting portion are configured in a step-difference manner.

[0013] To this end, some technical means of the present invention are to provide a water pump structure of an engine, wherein the water pump shaft and the camshaft are arranged coaxially.

[0014] To this end, some technical means of the present invention are to provide a water pump structure of an engine, wherein the camshaft support seat has a camshaft mounting hole; the water pump mounting hole and the camshaft mounting hole are arranged coaxially.

[0015] To this end, some technical means of the present invention are to provide a water pump structure for an engine, wherein the cooling water output portion of the water pump assembly has a first half body and a second half body, the first half body is formed by extending the water pump body toward one side, and the second half body is formed by extending the water pump outer cover toward one side; a leak-proof component is disposed at the outer joint of the first half body and the second half body; and a water outlet connection port is disposed at the end of the cooling water output portion, and the water outlet connection port is inserted into the cooling water inlet of the cylinder head.

[0016] To this end, some technical means of the present invention are to provide a water pump structure for an engine, wherein the water outlet connection port is sleeved with a leak-proof ring; the water outlet connection port has a step portion, and the leak-proof ring is sleeved on the step portion.

[0017] To this end, some technical means of the present invention are to provide a water pump structure for an engine, wherein the cooling water output portion is formed by extending the water pump body and the water pump cover together. The cooling water output portion extends at a preset angle and can serve as a positioning mechanism when the water pump component is assembled.

[0018] To this end, some technical means of the present invention are to provide a water pump structure of an engine, wherein the cooling water inlet of the cylinder head and the water pump mounting hole are located on the same side.

[0019] [Effects of the invention]

[0020] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head and improving the connection positioning effect by using some technical means.

[0021] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head, and improving the accuracy of connecting the water pump assembly and the cylinder head by means of some technical means.

[0022] The present invention can achieve the effect of improving the accuracy of the connection between the water pump component and the cylinder head by means of some technical means.

[0023] The present invention can achieve the effect of improving the sealing effect of the connection between the water pump component and the cylinder head by means of some technical means.

[0024] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head by means of some technical means.

[0025] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head by means of some technical means.

[0026] The present invention can achieve the effect of improving the positioning accuracy of the water pump component and the cylinder head when they are connected by some technical means.

[0027] The present invention can achieve the effect of improving the connection engineering between the cooling water output part and the cooling water inlet port of the cylinder head and improving the leakage prevention effect of the cooling water output part and the cooling water inlet port of the cylinder head by using some technical means.

[0028] The present invention can achieve the effect of enhancing the anti-leakage effect of the cooling water output portion and the cooling water inlet port of the cylinder head by means of some technical means.

[0029] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head, and improving the accuracy of connecting the water pump assembly and the cylinder head by means of some technical means.

[0030] The present invention can achieve the effect of improving the convenience of connecting the water pump assembly and the cylinder head by means of some technical means. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional schematic diagram of the engine of the present invention.

[0032] Figure 2 It is an exploded schematic diagram of the cylinder head group of the present invention.

[0033] Figure 3 The utility model is a three-dimensional water pump component of the present invention.

[0034] Figure 4 It is a cutaway stereoscopic view of the cylinder head and water pump assembly of the present invention.

[0035] Figure 5 It is a cross-sectional view of the cylinder head and water pump assembly of the present invention.

[0036] Figure 6 It is a partial cross-sectional view of the cooling water output portion and the cylinder head assembly of the water pump assembly of the present invention.

[0037] Figure 7 Schematic diagram of a straddle-type vehicle according to the present invention.

[0038] Figure 8 The present invention Figure 7 A cross-sectional view of the engine unit and continuously variable transmission system of a straddle-type vehicle.

[0039] Reference numerals list

[0040] 1: Engine

[0041] 11: Crankshaft chamber 111: Crankshaft

[0042] 12: Transmission system 121: Drive shaft

[0043] 13: Generator 14: Fan

[0044] 15: Liquid cooling device 16: Exhaust pipe

[0045] 2: Cylinder body

[0046] 3: Cylinder head group

[0047] 3a: Cooling water inlet 3b: Cooling water outlet

[0048] 31: Cylinder head

[0049] 311: Lower group surface 312: Upper group surface

[0050] 313: Water pump installation hole 3131: Flange

[0051] 314: Leak-proof gasket

[0052] 315: Camshaft support seat

[0053] 3151: Camshaft mounting hole

[0054] 3152: Rocker arm mounting hole

[0055] 316: Timing chain chamber 317: Ignition mounting part

[0056] 318: Exhaust port 319: Intake port

[0057] 31a: Lock hole

[0058] 32: Cylinder head cover

[0059] 4: Water pump assembly

[0060] 4a: Impeller chamber

[0061] 41: Pump body 41a: Open side

[0062] 411: External mounting seat 4111: Embossed groove

[0063] 412: Inner mounting seat 413: Position limiting portion

[0064] 414: Sealing ring 415: Bearing

[0065] 416: Locking hole

[0066] 42: Water pump shaft

[0067] 421: Connecting shaft

[0068] 43: Impeller

[0069] 44: Water pump cover

[0070] 441: Water inlet

[0071] 45: Cooling water output

[0072] 451: First half 452: Second half

[0073] 453: Leak-proof part 454: Lock hole

[0074] 455: Water outlet port 4551: Step difference

[0075] 456: Leak-proof ring

[0076] 5: Camshaft

[0077] 5a: Cam 5b: Insertion hole

[0078] 51: Timing gear 511: Through hole

[0079] 52: Timing chain

[0080] 53: Rocker arm assembly 54: Intake valve

[0081] 55: Exhaust valve

[0082] 6: Vehicles

[0083] 61: Frame unit

[0084] 611: Steering mechanism 612: Front fork unit

[0085] 613: Pedal

[0086] 62: Driver's Seat

[0087] 63: Storage box

[0088] 64: Body cover unit

[0089] 641: hood 642: front body cover

[0090] 643: Knee cover 644: Footrest cover

[0091] 645: Side body cover 646: Center body cover

[0092] A: Accommodation space

[0093] F: Ignition

[0094] P: Water pipe

[0095] FW: front wheel RW: rear wheel. DETAILED DESCRIPTION

[0096] In order to make it easier to understand the structure and effects of the present invention, the following description is provided in conjunction with the accompanying drawings.

[0097] First, see Figure 1 , 2 As shown, the water pump structure of the engine of the present invention is a water-cooled internal combustion engine. The engine 1 at least has a cylinder body 2, a cylinder head group 3 assembled on the cylinder body 2, and a water pump assembly 4 arranged on the side of the cylinder head group 3.

[0098] like Figure 1 , 6 As shown, the cylinder head assembly 3 can be assembled above the cylinder body 2.

[0099] like Figure 1 , 2 As shown, the cylinder head assembly 3 comprises a cylinder head 31 and a cylinder head cover 32 assembled on the cylinder head 31; the cylinder head 31 comprises a cooling water inlet 3a for cooling water to enter and a cooling water outlet 3b for cooling water to be discharged; the cylinder head 31 comprises a lower assembly surface 311 below, and the lower assembly surface 311 is used to be assembled on the upper end surface of the cylinder body 2; the cylinder head 31 comprises an upper assembly surface 312 on the opposite side of the lower assembly surface 311, and the upper assembly surface 312 is an inclined and complete assembly surface, The upper assembly surface 312 can be used for assembling the cylinder head cover 32. By virtue of the upper assembly surface 312 having an inclined and complete assembly surface, the cylinder head cover 32 can have a better assembly surface pressure when assembled on the upper assembly surface 312; the cylinder head 31 is provided with a water pump mounting hole 313 on the side between the lower assembly surface 311 and the upper assembly surface 312, and the water pump mounting hole 313 is arranged on the same side as the cooling water inlet (not shown in the figure) of the cylinder head assembly 3; since the upper assembly surface 312 is inclined, the cylinder head 31 is provided with a water pump mounting hole 313 on the side between the lower assembly surface 311 and the upper assembly surface 312; The height of the wall surface on the side of the water pump mounting hole 313 is higher than the height of the wall surface on the opposite side, so the water pump mounting hole 313 can be a complete circular hole, and the wall surface strength of the cylinder head 31 on the side where the water pump mounting hole 313 is provided will not be weakened. The water pump mounting hole 313 is slightly protruded toward the outside along the side wall surface of the cylinder head 31; a leakproof gasket 314 is interposed between the upper assembly surface 312 of the cylinder head 31 and the cylinder head cover 32; a receiving space is formed between the cylinder head 31 and the cylinder head cover 32. Specifically, the accommodating space A is formed mostly on the upper assembly surface 312 of the cylinder head 31 and is recessed downward; the cylinder head 31 is provided with a camshaft support seat 315 formed in one piece or assembled in two pieces in the accommodating space A, and the camshaft support seat 315 has a camshaft mounting hole 3151 and a rocker arm mounting hole 3152 on the side; the accommodating space A is provided with a timing chain chamber 316 that passes through the cylinder head 31 at one end side of the camshaft support seat 315 (located on the water pump mounting hole 313 side).

[0100] like Figure 1 , 4As shown in Figure 5, a camshaft 5 is installed on the camshaft support seat 315, and two cams 5a are provided on the camshaft 5. More specifically, the camshaft 5 is inserted into the camshaft support seat 315 through the camshaft mounting hole 3151 of the camshaft support seat 315; thereby, the camshaft 5 can be stably supported on the camshaft support seat 315. It should be mentioned that the present invention designs the water pump mounting hole 313 and the rocker arm mounting hole 3152 to be coaxially arranged, thereby facilitating the installation and synchronization of the water pump assembly 4 and the camshaft 5 during operation; a timing gear 51 is provided on one side of the camshaft 5, and the timing gear 51 is located in the timing chain chamber 316. The timing gear 51 is accommodated in the timing chain chamber 316. The timing gear 51 of the present invention is locked to the end face of one side of the camshaft 5 by a locking element. To illustrate with an example, a through hole 511 is provided in the middle of the timing gear 51, and an insertion hole 5b is provided on the side of the camshaft 5 where the timing gear 51 is installed, corresponding to the through hole 511; a timing chain 52 is connected to the timing gear 51, one end of the timing chain 52 is connected to the timing gear 51, and the other end is connected to the crankshaft (not shown in the figure), so that when the crankshaft drives the timing chain 52, the timing chain 52 can rotate the camshaft 5 on the cam support seat 315 through the timing gear 51, and the camshaft 5 will use the cam 5a to press the rocker arm assembly 53 installed on the rocker arm mounting hole 3152 of the camshaft support seat 315, and the rocker arm assembly 53 can provide the air required for combustion and explosion and the exhaust gas after combustion and explosion, and the intake and exhaust valves 54 and 55 arranged in the accommodating space A of the cylinder head 31 are actuated.

[0101] like Figure 1 , 2 As shown in Figures 4 and 5, the cylinder head 31 is provided with an igniter mounting portion 317 on the side opposite to the water pump mounting hole 313, and the igniter mounting portion 317 can be used to install an igniter F for combustion and explosion: the cylinder head 31 is provided with an exhaust port 318 and an air intake port 319 on the other two sides adjacent to the water pump mounting hole 313 and the igniter mounting portion 317, the air intake port 319 can be connected to an intake pipe (not shown in the figure) for providing fresh air required for combustion and explosion, and the exhaust port 318 is connected to an exhaust device (not shown in the figure) for discharging exhaust gas after combustion and explosion; the cylinder head 31 is provided with a plurality of locking holes 31a on the same side as the water pump mounting hole 313, and the locking holes 31a can be used to lock the water pump assembly 4.

[0102] like Figure 1 , 2As shown in , 3, 4, and 5, the water pump mounting hole 313 of the cylinder head 31 is installed with the water pump assembly 4 for water cooling; the water pump assembly 4 includes a water pump body 41, a water pump shaft 42 pivotally mounted on the water pump body 41 and linked to the camshaft 5, an impeller 43 away from the camshaft 5 and connected to the water pump shaft 42, a water pump outer cover 44 that can cover the impeller 43 and is combined with the water pump body 41, and a cooling water output portion 45 formed by the water pump body 41 and the water pump outer cover 44; the water pump assembly 4 is connected to the camshaft 5 and the timing gear 51 by means of the water pump shaft 42. More specifically, the water pump shaft 42 is extended with a connecting shaft portion 421 toward the camshaft 5 and the timing gear 51. The connecting shaft portion 421 of the present invention The connecting shaft portion 421 is implemented in a laterally flattened shape. The connecting shaft portion 421 passes through the through hole 511 of the timing gear 51 and is inserted into the insertion hole 5b of the camshaft 5. It should be mentioned that in an embodiment of the present invention, the water pump shaft 42 and the camshaft 5 are designed to be coaxially arranged, thereby ensuring that the water pump shaft 42 and the camshaft 5 can accurately rotate synchronously; when the crankshaft (not shown in the figure) drives the timing chain 52 to drive the timing gear 51, the timing gear 51 synchronously drives the water pump shaft 42 and the camshaft 5 to rotate, that is, the water pump shaft 42 and the impeller 43 of the water pump assembly 4 can be linked with the camshaft 5, so that the water pump assembly 4 is activated to pump cooling water into the engine 1 for cooling.

[0103] like Figure 1 , 2As shown in Figures 3, 4 and 5, one side of the water pump body 41 (away from the cylinder head 31) is an open side 41a, and one side of the water pump body 41 (towards the cylinder head 31) has an outer mounting seat portion 411 and an inner mounting seat portion 412, as well as a limiting portion 413 adjacent to the outer mounting portion 411; the outer mounting seat portion 411 of the present invention is implemented as an annular seat body, and the outer diameter of the outer mounting seat portion 411 matches the inner diameter of the water pump mounting hole 313 of the cylinder head 31, and the water pump body 41 is connected to the cylinder head 31 by inserting the outer mounting seat portion 411 into the water pump mounting hole 313 of the cylinder head 31; the outer mounting seat portion 411 The outer periphery of the outer mounting seat portion 411 is concavely provided with an embedding groove 4111, and the embedding groove 4111 is ring-arranged on the outer periphery of the outer mounting seat portion 411. The embedding groove 4111 is further embedded with a sealing ring 414, and the contact portion between the outer mounting seat portion 411 and the water pump mounting hole 313 has a better leak-proof effect by means of the sealing ring 414; when the present invention is implemented, the sealing ring 414 can also be embedded in the water pump mounting hole 313, that is, the water pump mounting hole 313 can also be concavely provided with an annular groove for the sealing ring 414 to be embedded; the inner mounting seat portion 412 is arranged at intervals on the inner side of the outer mounting seat portion 411, and a bearing 415 is installed inside the inner mounting seat portion 412, and the bearing 415 is installed inside the inner mounting seat portion 412. 15 axis supports the water pump shaft 42; a plurality of locking holes 416 are provided on the periphery of the water pump body 41, and the plurality of locking holes 416 correspond to the plurality of locking holes 31a of the cylinder head 31, whereby a locking element can be locked in the locking holes 416 and the locking holes 31a, thereby the water pump body 41 can be locked on the cylinder head 31; the limiting portion 413 is located outside the outer mounting seat portion 411, and the length of the limiting portion 413 extending outward from the wall surface of the water pump body 41 is shorter than the length of the outer mounting seat portion 411 extending outward from the wall surface of the water pump body 41, and further, the limiting portion 413 and the outer mounting seat portion 411 are arranged in a step-difference shape, whereby the limiting portion 413 and the outer mounting seat portion 411 are arranged in a step-difference shape, When the water pump assembly 4 is inserted into the water pump mounting hole 313 of the cylinder head 31 with the outer mounting seat portion 411 of the water pump body 41, the limiting portion 413 can serve as a depth limiting mechanism for the outer mounting seat portion 411 to be inserted into the water pump mounting hole 313. That is, after the outer mounting seat portion 411 is inserted into the preset position inside the water pump mounting hole 313, the limiting portion 413 will abut against the outer end surface of the flange portion 3131 of the water pump mounting hole 313, so that the limiting portion 413 can facilitate the assembly of the water pump assembly 4 and the cylinder head 31, and at the same time can further ensure the accuracy and positioning effect of the assembly of the water pump assembly 4 and the cylinder head 31.

[0104] like Figure 1 , 2As shown in Figures 3, 4 and 5, the water pump shaft 42 is axially supported on the bearing 415 inside the inner mounting seat 412 of the water pump body 41, and the water pump shaft 42 is extended toward the camshaft 5 and the timing gear 51 with the connecting shaft 421, and the connecting shaft 421 passes through the through hole 511 of the timing gear 51 and is inserted into the inserting hole 5b of the camshaft 5; the water pump shaft 42 is locked with the impeller 43 at the other side end of the connecting shaft 421; the present invention further arranges the water pump shaft 42 and the camshaft 5 to be coaxially configured.

[0105] like Figure 1 , 2 As shown in Figures 3, 4 and 5, the water pump outer cover 44 is a locking cover for the open side 41a of the water pump body 41, whereby the inner side of the water pump outer cover 44 and the open side 41a of the water pump body 41 can form an impeller chamber 4a, and the impeller chamber 4a can be used to accommodate the impeller 43 and provide space for the rotation of the impeller 43; a water inlet 441 is provided on one side of the water pump outer cover 44, and the water inlet 441 is connected to a cooling water heat dissipation device (not shown) by a water pipe P.

[0106] like Figure 1 , 2As shown in Figures 3, 4, 5 and 6, the cooling water output portion 45 comprises a first half body 451 and a second half body 452. The first half body 451 is formed by extending the water pump body 41 toward one side, and the second half body 452 is formed by extending the water pump outer cover 44 toward one side. A leak-proof member 453 is disposed at the outer joint of the first half body 451 and the second half body 452 to prevent water leakage at the outer joint of the first half body 451 and the second half body 452. A plurality of locking holes 454 are disposed at the periphery of the cooling water output portion 45. The cooling water output portion 45 uses the plurality of locking holes 454 to lock the first half body 451 and the second half body 452 with a locking element. The end of the cooling water output portion 45 comprises an outlet The water connection port 455 is provided with a leak-proof ring 456. Specifically, the water connection port 455 has a step portion 4551, and the leak-proof ring 456 is sleeved on the step portion 4551. The water connection port 455 is inserted into the cooling water inlet 3a of the cylinder head 31, so that the water pump assembly 4 can input the cooling water into the cylinder head 31 through the cooling water output portion 45 for cooling, and then input the cooling water into the cylinder head 31 through the water jacket (not shown) provided in the cylinder head 31 for cooling, and then transport the cooling water through the cooling water outlet 3b provided on the cylinder head 31 to the cooling water heat dissipation device (not shown) for heat dissipation and cooling. It should be mentioned that the present The cooling water inlet 3a and the cooling water outlet 3b of the cylinder head 31 of the invention can be arranged to be located on the same side or opposite sides of the cylinder group 31. The invention takes the arrangement of different sides as an example; since the cooling water output portion 45 is formed by the water pump body 41 and the water pump outer cover 44 extending together, the cooling water output portion 45 has a certain rigidity, and since it is formed by the water pump body 41 and the water pump outer cover 44 extending together, that is, the cooling water output portion 45 can extend at a preset angle, when the water pump assembly 4 is inserted into the water pump mounting hole 313 of the cylinder head 31 with the outer mounting seat portion 411 of the water pump body 41, the outer mounting seat portion 411 is an annular body and the water pump mounting hole 31 3 is a circular hole, so the extended angle of the cooling water output portion 45 can be used as a positioning mechanism when the water pump assembly 4 is connected to the cylinder head 31, so that the water pump assembly 4 and the cylinder head 31 can be conveniently connected during the connection process, and can also have a better positioning effect when the water pump assembly 4 and the cylinder head 31 are connected. It is worth mentioning that the present invention designs the water pump shaft 42 and the camshaft 5 to be coaxially arranged, and the water pump mounting hole 313 and the camshaft mounting hole 3151 to be coaxially arranged, and then uses the cooling water output portion 45 as a positioning mechanism, so that the water pump assembly 4 and the cylinder head 31 can have a very precise positioning effect when connected.

[0107] like Figure 7 , 8As shown in the specific embodiment, the water-cooled internal combustion engine of the present invention is used for a straddle-type vehicle 6 as an example, and the vehicle 6 has a frame unit 61, a steering mechanism 611 is provided in front of the frame unit 61, a front fork unit 612 is provided below the steering mechanism 611, and a front wheel FW is pivotally provided below the front fork unit 612; a driver's seat 62 is provided at the rear of the frame unit 61, and a storage box 63 is provided below the driver's seat 62; a footrest for the driver to rest his feet is provided between the steering mechanism 611 and the driver's seat 62 The frame unit 61 is provided with a body cover unit 64 at the rear of the footrest 613 and below the storage box 63. The outer periphery of the frame unit 61 is provided with a head cover unit 64, and the body cover unit 64 at least comprises a head cover 641 provided on the steering mechanism 611, a front body cover 642 provided at the front end of the frame unit 61, a knee cover 643 located behind the front body cover 642, a footrest cover 644 provided on the footrest 613, and side panels provided on both sides below the driver's seat 62. A body cover 645 is provided on a central body cover 646 below the front end of the driver's seat 62; a crank chamber 11 is provided below the cylinder body 2 of the engine 1, a crankshaft 111 is provided in the crank chamber 11, a transmission system 12 driven by the crankshaft 111 is provided on one side of the crank chamber 11, the transmission system 12 of the present invention is implemented by a belt stepless speed change system, a drive shaft 121 is provided at the rear end of the transmission system 12, a rear wheel RW is provided on the drive shaft 121, so that the rear wheel RW can be rotated when the engine 1 is running , so that the vehicle 6 can be driven; the cylinder body 2 of the engine 1 is provided with a generator 13 on the other side of the transmission system 12, and a fan 14 is provided on the coaxial outer side of the generator 13. A liquid heat dissipation device 15 is provided on the outer side of the fan. The liquid heat dissipation device 15 can provide cooling water to the water pump assembly 4, and the water pump assembly 4 then sends the cooling water from the liquid heat dissipation device 15 into the cylinder head group 3 to cool the cylinder head 31; the exhaust port 318 of the cylinder head 31 is connected to the exhaust pipe 16.

[0108] The effect of the present invention is that the engine 1 at least has a cylinder body 2, a cylinder head group 3 assembled on the cylinder body 2, and a water pump assembly 4 assembled on the cylinder head group 3; the cylinder head 31 has a cooling water inlet 3a; the cylinder head group 3 has a cylinder head 31 and a cylinder head cover 32 covered on the cylinder head 31; the cylinder head group 3 has an accommodating space A, a camshaft support seat 315 is installed in the accommodating space A, and a camshaft 5 is installed on the camshaft support seat 315; a water pump mounting hole 313 is provided on one side of the cylinder head 31, and the water pump assembly 4 is installed on the water pump mounting hole 313. hole 313; the water pump assembly 4 includes a water pump body 41, a water pump shaft 42 pivotally mounted on the water pump body 41 and linked to the camshaft 5, an impeller 43 away from the camshaft 5 and connected to the water pump shaft 42, a water pump outer cover 44 that can cover the impeller 43 and is combined with the water pump body 41, and a cooling water output portion 45 extending from the water pump body 41 and the water pump outer cover 44; one end of the cooling water output portion 45 is inserted into the cooling water inlet 3a of the cylinder head 31; thereby, the convenience of connecting the water pump assembly 4 and the cylinder head 31 and the connection positioning effect can be improved.

[0109] The water pump structure of the engine of the present invention can indeed achieve the claimed purpose through the above-mentioned structure, and should meet the novelty, creativity and practicality of the invention patent.

Claims

1. A water pump structure for an engine, characterized in that: The engine at least comprises a cylinder body, a cylinder head group assembled on the cylinder body, and a water pump assembly assembled on the cylinder head group; the cylinder head group comprises a cylinder head and a cylinder head cover arranged on the cylinder head, the cylinder head having a cooling water inlet; the cylinder head group has an accommodating space, a camshaft support seat is installed in the accommodating space, a camshaft is installed on the camshaft support seat, a water pump mounting hole is provided on one side of the cylinder head, and the water pump assembly is mounted on the water pump mounting hole; the water pump assembly comprises a water pump body, a water pump shaft pivotally arranged on the water pump body and linked to the camshaft, an impeller away from the camshaft and connected to the water pump shaft, a water pump outer cover which can cover the impeller and is combined with the water pump body, and a cooling water output portion extended by the water pump body and the water pump outer cover; one end of the cooling water output portion is plugged into the cooling water inlet of the cylinder head.

2. The water pump structure of the engine according to claim 1, characterized in that: One side of the water pump body is provided with an outer mounting seat portion, an inner mounting seat portion, and a limiting portion adjacent to the outer mounting portion; the outer mounting portion can be inserted into the water pump mounting hole.

3. The water pump structure of the engine according to claim 2, characterized in that: The water pump installation hole is provided with a flange portion protruding outward; and the limiting portion can abut against the flange portion.

4. The water pump structure of the engine according to claim 2, characterized in that: A sealing ring is disposed between the outer mounting seat and the water pump mounting hole; the sealing ring is sleeved in the groove of the outer mounting portion or embedded in the water pump mounting hole.

5. The water pump structure of the engine according to claim 2, characterized in that: The outer mounting seat portion and the limiting portion are arranged with a step difference.

6. The water pump structure of the engine according to claim 1, characterized in that: The water pump shaft and the cam shaft are arranged coaxially.

7. The water pump structure of the engine according to claim 1, characterized in that: The camshaft support seat has a camshaft mounting hole; the water pump mounting hole and the camshaft mounting hole are arranged coaxially.

8. The water pump structure of an engine according to claim 1, characterized in that: The cooling water output part of the water pump assembly has a first half body and a second half body, the first half body is formed by extending the water pump body toward one side, and the second half body is formed by extending the water pump outer cover toward one side; a leak-proof part is disposed at the outer joint of the first half body and the second half body; a water outlet connection port is disposed at the end of the cooling water output part, and the water outlet connection port is inserted into the cooling water inlet of the cylinder head.

9. The water pump structure of the engine according to claim 8, characterized in that: The water outlet connection port is sleeved with a leak-proof ring; the water outlet connection port has a step-difference portion, and the leak-proof ring is sleeved on the step-difference portion.

10. The water pump structure of the engine according to claim 8, characterized in that: The cooling water output portion is formed by extending the water pump body and the water pump outer cover together. The cooling water output portion extends at a preset angle and can serve as a positioning mechanism when the water pump assembly is assembled.

11. The water pump structure of an engine according to claim 1, characterized in that: The cooling water inlet of the cylinder head and the water pump mounting hole are located on the same side.

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