Power assembly

Abstract

The utility model discloses a power assembly which comprises a shell, a crank connecting rod mechanism and a speed change mechanism, and the shell comprises a crankcase and a continuously variable transmission connected with the crankcase; the crank connecting rod mechanism comprises a crankshaft which is located in a crankshaft box. The speed change mechanism is at least partially located in the continuously variable transmission and is in transmission connection with the crankshaft; the continuously variable transmission is located on one side of the crankcase in the width direction of the power assembly, a speed change space is formed in the continuously variable transmission, and the speed change mechanism is at least partially located in the speed change space; the continuously variable transmission comprises a cavity plate, the cavity plate is located in the speed change space and arranged around the speed change mechanism, an air outlet is formed in the continuously variable transmission and communicated with the speed change space, and at least part of the cavity plate is located between the air outlet and the speed change mechanism. Through the arrangement, the cavity plate can protect the speed change mechanism, so that the service life of the speed change mechanism is prolonged, and the service life of the power assembly is prolonged.

Description

Technical Field

[0001] The present application relates to the field of power devices, and in particular to a power assembly. Background Art

[0002] At present, the powertrain includes a crank-connecting rod mechanism, a speed change mechanism and a continuously variable transmission. The speed change mechanism is basically located in the continuously variable transmission and is transmission-connected to the crank-connecting rod mechanism, so that the crank-connecting rod mechanism adjusts the output power through the speed change mechanism, thereby improving the overall performance of the powertrain.

[0003] In the prior art, the speed change mechanism generates heat when working, so an air inlet and an air outlet are opened on the continuously variable transmission. Since impurities such as dust in the air will enter the continuously variable transmission with the air, they will be deposited on the speed change mechanism, thereby reducing the service life of the speed change mechanism. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a power assembly whose transmission mechanism has a longer service life.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] A powertrain, comprising a housing, a crank-connecting rod mechanism and a speed change mechanism, wherein the housing comprises a crankcase and a continuously variable transmission connected to the crankcase; the crank-connecting rod mechanism comprises a crankshaft, which is located in the crankcase and is rotationally connected to the crankcase; the speed change mechanism is at least partially located in the continuously variable transmission, which is transmission-connected to the crankshaft; the continuously variable transmission is located on one side of the crankcase along the width direction of the powertrain, a speed change space is formed inside the continuously variable transmission, and the speed change mechanism is at least partially located in the speed change space; the continuously variable transmission comprises a chamber plate, which is located in the speed change space and is arranged around the speed change mechanism, an air outlet is provided on the continuously variable transmission, the air outlet is connected to the speed change space, and the chamber plate is at least partially located between the air outlet and the speed change mechanism.

[0007] Furthermore, the continuously variable transmission includes an air inlet box and an air exhaust box distributed along the width direction of the powertrain, the air inlet box is connected to the exhaust box and forms a speed change space, the chamber plate extends along the width direction of the powertrain and is connected to the exhaust box, and the air outlet is opened on the exhaust box.

[0008] Furthermore, the chamber plate is connected to the exhaust box body to form a dustproof chamber, and the speed change mechanism includes a speed change main wheel and a speed change secondary wheel distributed along the length direction of the power train, and a side of the speed change main wheel close to the exhaust box body is at least partially located in the dustproof chamber.

[0009] Further, a longitudinal plane perpendicular to the width direction of the power assembly is defined. The projection of the chamber plate on the longitudinal plane along the width direction of the power assembly is the chamber projection, and the projection of the main transmission gear on the longitudinal plane along the width direction of the power assembly is the main gear projection. The distance range between the chamber projection and the main gear projection is from 2 cm to 3 cm.

[0010] Further, the distance range between the chamber projection and the main gear projection is from 2.3 cm to 2.7 cm.

[0011] Further, the transmission mechanism further includes a transmission belt. The main transmission gear and the auxiliary transmission gear are connected by the transmission belt in a transmission manner. At least part of the chamber plate is located between the main transmission gear and the auxiliary transmission gear and is arranged close to the transmission belt.

[0012] Further, the ratio range of the maximum width of the chamber plate along the width direction of the power assembly to the maximum width of the main transmission gear along the width direction of the power assembly is from 0.35 to 0.75.

[0013] Further, the maximum width range of the chamber plate along the width direction of the power assembly is from 6.8 cm to 9.6 cm.

[0014] Further, at least part of the exhaust air box body extends towards the side away from the intake air box body and forms a dust accumulation space. The dust accumulation space is communicated with the transmission space. The side of the chamber plate facing away from the transmission mechanism is arranged around the dust accumulation space. The air outlet is opened on the upper side of the dust accumulation space and is communicated with the dust accumulation space.

[0015] Further, an air inlet is opened on the intake air box body. The air inlet is communicated with the transmission space. The continuously variable transmission further includes a wind guiding plate. The wind guiding plate is connected to the intake air box body. Along the width direction of the power assembly, the wind guiding plate is located between the transmission mechanism and the air inlet; the transmission mechanism includes a guide fan blade. A wind guiding opening is opened on the wind guiding plate. The air inlet is communicated with the guide fan blade through the wind guiding opening.

[0016] The above-mentioned power assembly can arrange the chamber plate substantially around the transmission mechanism, so that the chamber plate can protect the transmission mechanism, which is beneficial to improving the service life of the transmission mechanism, and further beneficial to improving the service life of the power assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the power assembly provided by the embodiment of the present application.

[0018] Figure 2 It is a partial exploded view of the power assembly provided by the embodiment of the present application.

[0019] Figure 3 It is an exploded view of the continuously variable transmission and the transmission mechanism of the power assembly provided by the embodiment of the present application.

[0020] Figure 4 Side view of the continuously variable transmission and the transmission mechanism of the powertrain provided by the embodiment of the present application.

[0021] Figure 5 Partial cross-sectional view of the continuously variable transmission and the transmission mechanism of the powertrain provided by the embodiment of the present application. Detailed implementation manners

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the specific implementation manners of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0023] As Figure 1 and Figure 2A powertrain 100 is shown, which includes a housing 11, a crank connecting rod mechanism 12, a transmission mechanism 13, a valve train 14, a starting mechanism 15, and a lubrication mechanism 16. The housing 11 constitutes the basic framework of the powertrain 100. An accommodation space 101 is formed inside the housing 11, and the accommodation space 101 is used to accommodate and protect the internal components of the powertrain 100. Among them, the housing 11 includes a cylinder head cover 111, a cylinder head 112, a cylinder block 113, a crankcase 114, an oil pan 115, and a gearbox 116. Among them, the cylinder head cover 111, the cylinder head 112, the cylinder block 113, the crankcase 114, and the oil pan 115 are connected in sequence, and the gearbox 116 is connected to the crankcase 114. The accommodation space 101 is basically formed by the mutual connection of the cylinder head cover 111, the cylinder head 112, the cylinder block 113, the crankcase 114, the oil pan 115, and the gearbox 116. The crank connecting rod mechanism 12 is at least partially arranged in the crankcase 114. The crank connecting rod mechanism 12 includes a crankshaft 121 and a connecting rod assembly 122 connected to the crankshaft 121. The crankshaft 121 is located inside the crankcase 114 and is rotationally connected to the crankcase 114. The connecting rod assembly 122 is at least partially located inside the crankcase 114 and at least partially located in the cylinder block 113. The transmission mechanism 13 is located inside the gearbox 116, and the transmission mechanism 13 is drivingly connected to the crankshaft 121. The valve train 14 is at least partially arranged in the accommodation space 101, and the valve train 14 is drivingly connected to the crankshaft 121. The starting mechanism 15 is located outside the crankcase 114 and is connected to the crankcase 114. The starting mechanism 15 at least partially passes through the crankcase 114 and is drivingly connected to the crankshaft 121. The lubrication mechanism 16 is at least partially located inside the oil pan 115, and the lubrication mechanism 16 is arranged through the cylinder head 112, the cylinder block 113, and the crankcase 114 to achieve lubrication of the internal components of the housing 11. When the powertrain 100 is working, fuel and air are mixed into a combustible mixture and then delivered to the combustion chamber 1120 of the powertrain 100. After the combustible mixture burns, a large amount of heat is released, and the gas pressure and temperature in the cylinder block 113 rise rapidly, thereby driving the connecting rod assembly 122 to move. Among them, the combustion chamber 1120 of the powertrain 100 is constituted by the bottom of the cylinder head 112 and the top of the cylinder block 113. The crankshaft 121 is connected to the connecting rod assembly 122, and the movement of the connecting rod assembly 122 can drive the crankshaft 121 to move, so that the crank connecting rod mechanism 12 can output power. To clearly illustrate the technical solution of the present application, the following is also defined as Figure 1Front, rear, left, right, top and bottom as shown. It can be understood that in the embodiments of the present application, the front-rear direction refers to the length direction of the powertrain 100, the left-right direction refers to the width direction of the powertrain 100, and the up-down direction refers to the height direction of the powertrain 100. Among them, the cylinder head cover 111, the cylinder head 112, the cylinder block 113, the crankcase 114 and the oil pan 115 are basically distributed along the up-down direction, that is, the crankcase 114 is arranged on the upper side of the oil pan 115, the cylinder block 113 is arranged on the upper side of the crankcase 114, the cylinder head 112 is arranged on the upper side of the cylinder block 113, and the cylinder head cover 111 is arranged on the upper side of the cylinder head 112.

[0024] As Figure 3 shown, as an implementation manner, the transmission 116 includes a continuously variable transmission 1161 connected to the crankcase 114. The continuously variable transmission 1161 is located on one side of the crankcase 114 along the width direction of the powertrain 100. A transmission space 102 is formed inside the continuously variable transmission 1161, and the transmission mechanism 13 is at least partially located in the transmission space 102. Specifically, the continuously variable transmission 1161 is used to protect the transmission mechanism 13, which is beneficial to improving the safety of the transmission mechanism 13. At the same time, the continuously variable transmission 1161 and the crankcase 114 are distributed along the width direction of the powertrain 100, which can make the structures of the continuously variable transmission 1161 and the crankcase 114 more compact, and further is beneficial to improving the structural compactness of the powertrain 100.

[0025] In this embodiment, the continuously variable transmission 1161 includes a chamber plate 1161a. The chamber plate 1161a is located in the transmission space 102 and arranged around the transmission mechanism 13. An air outlet 1162 is provided on the continuously variable transmission 1161, and the air outlet 1162 communicates with the transmission space 102. At least part of the chamber plate 1161a is located between the air outlet 1162 and the transmission mechanism 13. Specifically, an air inlet 1163 is also provided on the continuously variable transmission 1161, and the air inlet 1163 communicates with the transmission space 102. The outside air enters the transmission space 102 through the air inlet 1163 and then flows out of the transmission space 102 through the air outlet 1162 to cool the transmission mechanism 13. Among them, since the outside air will carry dust and other substances into it, the chamber plate 1161a can block most of the dust to prevent the dust from depositing on the transmission mechanism 13. Through the above settings, the chamber plate 1161a can protect the transmission mechanism 13, which is beneficial to improving the service life of the transmission mechanism 13, and further improving the service life of the powertrain 100.

[0026] As an implementation, the continuously variable transmission 1161 includes an air inlet box body 1161b and an air outlet box body 1161c distributed along the width direction of the powertrain 100. The air inlet box body 1161b is connected to the air outlet box body 1161c and forms the above-mentioned variable speed space 102. The chamber plate 1161a extends along the width direction of the powertrain 100 and is connected to the air outlet box body 1161c. The air inlet 1163 is opened on the air inlet box body 1161b, and the air outlet 1162 is opened on the air outlet box body 1161c. Specifically, the air inlet box body 1161b and the air outlet box body 1161c are detachably connected, which is convenient for the assembly and maintenance of the variable speed mechanism 13, thus facilitating the improvement of the assembly performance and maintenance performance of the powertrain 100. At the same time, the air inlet 1163 and the air outlet 1162 are respectively arranged on different box bodies to prevent the gas from directly discharging from the air outlet 1162 after entering from the air inlet 1163, thereby increasing the duration of the external gas in the variable speed space 102, enabling the external gas to fully contact the variable speed mechanism 13, and further facilitating the improvement of the cooling effect of the variable speed mechanism 13.

[0027] In this embodiment, the chamber plate 1161a is connected to the air outlet box body 1161c and forms a dust-proof chamber 103. The variable speed mechanism 13 includes a variable speed main wheel 131 and a variable speed auxiliary wheel 132 distributed along the length direction of the powertrain 100. At least a part of the side of the variable speed main wheel 131 close to the air outlet box body 1161c is located in the dust-proof chamber 103. Specifically, due to the complex structure of the variable speed main wheel 131 and the existence of movable connections between the components of the variable speed main wheel 131, the variable speed main wheel 131 is placed in the dust-proof chamber 103 to prevent external dust from depositing on the components of the variable speed main wheel 131 and causing accelerated wear of the variable speed main wheel 131, thus facilitating the extension of the service life of the variable speed main wheel 131 and further improving the service life of the powertrain 100.

[0028] Such as Figure 4As shown, by way of example, a longitudinal plane 104 perpendicular to the width direction of the powertrain 100 is defined. The projection of the chamber plate 1161a on the longitudinal plane 104 in the width direction of the powertrain 100 is the chamber projection, and the projection of the main transmission gear 131 on the longitudinal plane 104 in the width direction of the powertrain 100 is the main gear projection. The distance D1 between the chamber projection and the main gear projection ranges from 2 cm to 3 cm. Further, the distance D1 between the chamber projection and the main gear projection ranges from 2.3 cm to 2.7 cm. Still further, the distance D1 between the chamber projection and the main gear projection is 2.5 cm. Through the above settings, it is possible to avoid excessive clearance between the chamber plate 1161a and the main transmission gear 131 due to an overly large distance D1 between the chamber projection and the main gear projection, thereby preventing dust from depositing on the main transmission gear 131 through the clearance between the chamber plate 1161a and the main transmission gear 131, which is beneficial to extending the service life of the main transmission gear 131; and it is also possible to avoid interference between the chamber plate 1161a and the main transmission gear 131 due to an overly small distance D1 between the chamber projection and the main gear projection, thereby preventing the main transmission gear 131 from contacting the chamber plate 1161a during rotation, which is beneficial to improving the working efficiency of the main transmission gear 131 and also beneficial to extending the service lives of the main transmission gear 131 and the chamber plate 1161a.

[0029] As Figure 3 and Figure 4 shown, as an implementation, the transmission mechanism 13 further includes a transmission belt 133. The main transmission gear 131 and the auxiliary transmission gear 132 are drivingly connected through the transmission belt 133. The chamber plate 1161a is at least partially located between the main transmission gear 131 and the auxiliary transmission gear 132 and is arranged close to the transmission belt 133. Specifically, the main transmission gear 131 drives the auxiliary transmission gear 132 to rotate through the transmission belt 133. Arranging the chamber plate 1161a at least partially between the main transmission gear 131 and the auxiliary transmission gear 132 can better protect the main transmission gear 131, which is beneficial to improving the dust-proof effect of the main transmission gear 131. At the same time, the structure among the transmission belt 133, the chamber plate 1161a, the main transmission gear 131 and the auxiliary transmission gear 132 is more compact, which is further beneficial to improving the structural compactness of the powertrain 100.

[0030] As Figure 5As shown, as an implementation, the ratio range of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 to the maximum width W2 of the main transmission gear 131 in the width direction of the powertrain 100 is from 0.35 to 0.75. Specifically, the ratio range of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 to the maximum width W2 of the main transmission gear 131 in the width direction of the powertrain 100 is from 0.45 to 0.65. More specifically, the ratio of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 to the maximum width W2 of the main transmission gear 131 in the width direction of the powertrain 100 is 0.55. Through the above settings, it is possible to avoid interference between the chamber plate 1161a and the transmission belt 133 due to the excessive maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 and the excessive maximum width W2 of the main transmission gear 131 in the width direction of the powertrain 100, so as to prevent wear of the transmission belt 133, which is beneficial to improving the service life of the transmission belt 133; it is also possible to avoid a decrease in the protection performance of the chamber plate 1161a due to the excessive smallness of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 and the excessive smallness of the maximum width W2 of the main transmission gear 131 in the width direction of the powertrain 100, so as to prevent dust accumulation on the main transmission gear 131, and further beneficial to improving the service life of the main transmission gear 131 and the protection performance of the chamber plate 1161a.

[0031] In this embodiment, the range of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 is from 6.8 cm to 9.6 cm. Further, the range of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 is from 7.6 cm to 8.8 cm. Even further, the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100 is 8 cm. Through the above settings, it is possible to avoid interference between the chamber plate 1161a and the transmission belt 133 due to the excessive maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100, so as to prevent wear of the transmission belt 133, which is beneficial to improving the service life of the transmission belt 133; it is also possible to avoid an overly small coverage range of the chamber plate 1161a for the main transmission gear 131 due to the excessive smallness of the maximum width W1 of the chamber plate 1161a in the width direction of the powertrain 100, so as to prevent the main transmission gear 131 from coming into contact with dust, and further beneficial to improving the cleanliness of the main transmission gear 131.

[0032] As Figure 3As shown, as an implementation, the exhaust air box body 1161c extends at least partially towards a side away from the intake air box body 1161b and forms a dust accumulation space 105. The dust accumulation space 105 communicates with the variable speed space 102. The chamber plate 1161a is arranged around the dust accumulation space 105 on a side facing away from the variable speed mechanism 13. The air outlet 1162 is opened on the upper side of the dust accumulation space 105 and communicates with the dust accumulation space 105. Specifically, the chamber plate 1161a is located below the air outlet 1162. The end face of the chamber plate 1161a on the side facing away from the variable speed mechanism 13 is of an arc structure, and this end face has a guiding function. Since the mass of dust is greater than the mass of air, most of the dust in the air will be below and deposited on the chamber plate 1161a. Therefore, in this application, the dust accumulation space 105 is arranged in the exhaust air box body 1161c, and the chamber plate 1161a is basically located below the dust accumulation space 105, so that dust can be deposited on the chamber plate 1161a, thereby preventing dust from falling downward and depositing on the variable speed mechanism 13, and further being beneficial to improving the service life of the variable speed mechanism 13. It should be noted that when the air flow in the variable speed mechanism 13 is relatively fast, since the dust accumulation space 105 is arranged close to the air outlet 1162, the dust on the chamber plate 1161a will enter the dust accumulation space 105 along with the air, and further be beneficial to improving the cleanliness of the power assembly 100.

[0033] As Figure 3 and Figure 4 As shown, in this embodiment, the continuously variable transmission 1161 further includes a wind guiding plate 1161d located in the variable speed space 102. The wind guiding plate 1161d is connected to the intake air box body 1161b. Along the width direction of the power assembly 100, the wind guiding plate 1161d is located between the variable speed mechanism 13 and the air inlet 1163. Specifically, the wind guiding plate 1161d can adjust the flow direction of air in the variable speed space 102 to increase the air flow path, so as to facilitate cooling the variable speed mechanism 13. More specifically, the variable speed mechanism 13 includes a guiding fan blade 134. A wind guiding opening 1161e is formed on the wind guiding plate 1161d. The air inlet 1163 communicates with the guiding fan blade 134 through the wind guiding opening 1161e. The wind guiding opening 1161e can guide air to contact the guiding fan blade 134. The guiding fan blade 134 will drive air to flow during rotation, thereby increasing the air flow rate in the variable speed space 102, so that the air pressure in the variable speed space 102 is lower than the external air pressure, and thus air can quickly flow into the variable speed space 102 from the outside to realize cooling the variable speed mechanism 13. At the same time, the air flow rate in the variable speed space 102 is relatively fast, and the dust in the dust accumulation space 105 can be carried to the outside, and further be beneficial to improving the cleanliness of the power assembly 100.

[0034] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this application.

Claims

1. A powertrain, comprising: A housing, the housing comprising a crankcase and a continuously variable transmission connected to the crankcase; A crank-connecting rod mechanism, wherein the crank-connecting rod mechanism comprises a crankshaft, and the crankshaft is located in the crankcase; A speed change mechanism, wherein the speed change mechanism is at least partially located in the continuously variable transmission and is drivingly connected to the crankshaft; It is characterized in that The continuously variable transmission is located at one side of the crankcase along the width direction of the powertrain, a speed change space is formed inside the continuously variable transmission, and the speed change mechanism is at least partially located in the speed change space; The continuously variable transmission includes a chamber plate, which is located in the speed changing space and arranged around the speed changing mechanism. An air outlet is opened on the continuously variable transmission, and the air outlet is connected to the speed changing space. The chamber plate is at least partially located between the air outlet and the speed changing mechanism.

2. The powertrain according to claim 1, characterized in that: The continuously variable transmission includes an air inlet box and an air exhaust box distributed along the width direction of the powertrain, the air inlet box is connected to the exhaust box and forms the speed change space, the chamber plate extends along the width direction of the powertrain and is connected to the exhaust box, and the air outlet is opened on the exhaust box.

3. The powertrain according to claim 2, characterized in that: The chamber plate is connected to the exhaust box body to form a dustproof chamber. The speed change mechanism includes a speed change main wheel and a speed change secondary wheel distributed along the length direction of the power train. The side of the speed change main wheel close to the exhaust box body is at least partially located in the dustproof chamber.

4. The powertrain according to claim 3, characterized in that: A longitudinal plane perpendicular to the width direction of the powertrain is defined, the projection of the chamber plate along the width direction of the powertrain on the longitudinal plane is the chamber projection, the projection of the speed-changing main wheel along the width direction of the powertrain on the longitudinal plane is the main wheel projection, and the distance between the chamber projection and the main wheel projection ranges from 2 cm to 3 cm.

5. The powertrain according to claim 4, characterized in that: The distance between the cavity projection and the main wheel projection ranges from 2.3 cm to 2.7 cm.

6. The powertrain according to claim 3, characterized in that: The speed change mechanism also includes a speed change belt, the speed change main wheel and the speed change secondary wheel are connected through the speed change belt, and the chamber plate is at least partially located between the speed change main wheel and the speed change secondary wheel and is arranged close to the speed change belt.

7. The powertrain according to claim 3, characterized in that: The ratio of the maximum width of the chamber plate along the width direction of the powertrain to the maximum width of the speed-changing main wheel along the width direction of the powertrain is in a range of 0.35 to 0.

75.

8. The powertrain according to claim 7, characterized in that: The maximum width of the chamber plate along the width direction of the powertrain is in a range of 6.8 cm to 9.6 cm.

9. The powertrain according to claim 2, characterized in that: The exhaust box body at least partially extends to a side away from the air inlet box body and forms a dust storage space, and the dust storage space is connected to the speed change space. The chamber plate is arranged around the dust storage space on a side away from the speed change mechanism, and the air outlet is opened on the upper side of the dust storage space and is connected to the dust storage space.

10. The powertrain according to claim 2, characterized in that: The continuously variable transmission is also provided with an air inlet, the air inlet is communicated with the speed change space, the continuously variable transmission further comprises an air guide plate located in the speed change space, the air guide plate is connected with the air inlet box, and along the width direction of the power assembly, the air guide plate is located between the speed change mechanism and the air inlet; The speed change mechanism comprises a guide blade, an air guide port is provided on the air guide plate, and the air inlet is connected with the guide blade via the air guide port.

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