Balance shaft framework, engine and vehicle

Abstract

The invention discloses a balance shaft framework, an engine and a vehicle, and the balance shaft framework comprises a balance shaft gear which is used for being meshed with a driving gear ring of a crankshaft; the balance shaft gear is in transmission fit with the balance ring, and the balance ring is in guide fit with the guide support; and the balance shaft gear is arranged to drive the balance ring to do reciprocating motion along the guide support during rotation. According to the balance shaft framework, the problems of knocking and howling NVH caused by multi-stage gear transmission can be solved while the inertia force of an engine is effectively balanced and the operation stability of the engine is improved, so that noise is reduced, the user experience is improved, and the balance shaft framework is simple in overall structure, low in cost, compact in structure and small in occupied space.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a balancing shaft frame, an engine with the balancing shaft frame, and a vehicle with the balancing shaft frame or the engine. Background Art

[0002] The vibration and noise level of the engine has become one of the important evaluation indicators of the engine's comprehensive performance. Improving vibration quality and reducing costs are the main ways to improve the market competitiveness of engines. Improving engine vibration quality is also an important way to reduce vehicle vibration. Balance shaft technology is used to reduce engine vibration and improve driving comfort.

[0003] Existing engine balance shaft transmission forms are mostly chain transmission and gear transmission. In the gear transmission form, multi-stage gear meshing transmission is prone to howling and knocking noises in the engine. The human ear is very sensitive to howling noise, and the subjective feeling is not good. In addition, the large number of gears leads to heavy weight and large space occupation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a balancing shaft frame, which can effectively balance the inertial force of the engine, improve the running stability of the engine, and solve the knocking and howling NVH problems caused by multi-stage gear transmission, thereby reducing noise and improving user experience. The overall structure is simple, low cost, compact, and small in space.

[0005] According to an embodiment of the present invention, the balance shaft frame includes: a balance shaft gear, which is used to mesh with the driving gear ring of the crankshaft; a balance ring and a guide support, the balance shaft gear is in transmission cooperation with the balance ring, and the balance ring is in guiding cooperation with the guide support; wherein the balance shaft gear is configured to drive the balance ring to reciprocate along the guide support when rotating.

[0006] The balance shaft frame according to the embodiment of the present invention receives power from the crankshaft to drive the balance shaft gear to rotate by meshing the balance shaft gear with the driving gear ring of the crankshaft. When the balance shaft gear rotates, the balance ring is driven to reciprocate along the guide support to convert the rotational motion of the balance shaft gear into a linear reciprocating motion of the balance ring. This effectively balances the inertia force of the engine and improves the running stability of the engine. At the same time, it solves the NVH problems of knocking and howling caused by multi-stage gear transmission, thereby reducing noise and improving user experience. The balance shaft frame has a simple overall structure, low cost, light weight, compact structure, and small space occupation.

[0007] According to some embodiments of the present invention, the balancing shaft frame further comprises a transmission member, wherein the transmission member is connected to the balancing shaft gear, and the balancing shaft gear is in transmission cooperation with the balancing ring through the transmission member.

[0008] According to the balancing shaft frame of some embodiments of the present invention, an activity space is formed in the balancing ring, and the transmission member includes a driving part, which extends into the activity space and is suitable for pushing the inner wall of the activity space to drive the balancing ring to move.

[0009] According to the balancing shaft frame of some embodiments of the present invention, the activity space is configured as an oblong hole extending along a first direction, and the first direction intersects with a guiding direction of the guide support.

[0010] According to the balancing shaft frame of some embodiments of the present invention, the transmission member further includes a limiting portion, an outer diameter of the limiting portion is larger than a width of the activity space in a second direction, and the second direction intersects with the first direction.

[0011] According to the balancing shaft structure of some embodiments of the present invention, the guiding direction is perpendicular to the first direction; and / or the second direction is perpendicular to the first direction.

[0012] According to the balance shaft frame of some embodiments of the present invention, the transmission member further includes a first connecting portion, the balance shaft gear is provided with an eccentrically arranged second connecting portion, and the first connecting portion is connected and cooperated with the second connecting portion.

[0013] According to some embodiments of the balance shaft frame of the present invention, one of the first connection portion and the second connection portion is configured as a connection hole and the other is configured as a connection column, and the connection column is plug-fitted with the connection hole along the axial direction of the balance shaft gear.

[0014] According to some embodiments of the balancing shaft frame of the present invention, the balancing ring is provided with a guide matching portion, the guide support is formed with a guide portion, and the guide matching portion slides along the guide portion; and / or, the guide support is provided with a weight reduction hole; and / or, it also includes a balancing shaft bracket, and the balancing shaft gear is rotatably mounted on the balancing shaft bracket.

[0015] According to some embodiments of the balancing shaft frame of the present invention, the guide portion is configured as a guide slot, the guide matching portion is configured as a guide block protruding from the balancing ring toward the guide support, the guide block extends into the guide slot and slides along the guide slot; and / or, there are multiple guide matching portions and multiple guide portions, and the multiple guide matching portions and the multiple guide portions are matched one-to-one.

[0016] The invention also provides an engine.

[0017] An engine according to an embodiment of the present invention comprises a crankshaft and a balance shaft frame as described in any one of the above embodiments, wherein the balance shaft gear is meshed with a driving ring gear of the crankshaft.

[0018] The present invention also provides a vehicle.

[0019] A vehicle according to an embodiment of the present invention comprises the balance shaft frame described in any one of the above embodiments or the engine described in the above embodiments.

[0020] The advantages of the vehicle, the engine and the above-mentioned balance shaft frame over the prior art are the same and will not be described in detail here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a balance shaft frame according to an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a balance shaft frame and a crankshaft drive gear ring according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of a balancing ring according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a transmission member according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a balancing ring and a transmission member according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a balance shaft gear according to an embodiment of the present invention;

[0029] Figure 7 is a schematic structural diagram of a balance shaft support according to an embodiment of the present invention;

[0030] Figure 8 is a schematic structural diagram of a guide support according to an embodiment of the present invention;

[0031] Fig. 9 It is a schematic structural diagram of a guide support and a balancing ring according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Balance shaft frame 100,

[0034] Balance shaft gear 1, second connecting part 11, driving gear ring 2, balance ring 3, movable space 31, guide block 32, guide support 4, guide slide groove 41, weight reduction hole 42, needle bearing 5, transmission part 6, first connecting part 61, driving part 62, plane section 621, limiting part 63, balance shaft bracket 7, guide bearing 81, gear bearing 82. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0039] Reference below Figure 1-Figure 9A balancing shaft frame 100 according to an embodiment of the present invention is described. The balancing shaft frame 100 can effectively balance the inertia force of the engine, improve the running stability of the engine, and solve the NVH problems of knocking and howling caused by multi-stage gear transmission, thereby reducing noise and improving user experience. The overall structure is simple, low cost, compact structure, and small space occupation.

[0040] like Figure 1-Figure 9 As shown, a balancing shaft frame 100 according to an embodiment of the present invention includes: a balancing shaft gear 1, a balancing ring 3 and a guide support 4.

[0041] First, it should be noted that during the operation of the engine, the rapid and uneven movement of the piston will generate large inertial forces, which will cause the engine to vibrate. The balance shaft frame 100 of the present invention can balance these inertial forces to reduce the vibration generated by the engine.

[0042] The balance shaft gear 1 is used to mesh with the drive ring gear 2 of the crankshaft, such as Figure 1 As shown, the balance shaft gear 1 is meshed with the driving gear ring 2 of the crankshaft, so that the driving gear ring 2 of the crankshaft can drive the balance shaft gear 1 to rotate and transmit the power to the balance shaft gear 1. The balance shaft gear 1 is in transmission cooperation with the balance ring 3, that is, the balance ring 3 can receive the driving force from the balance shaft gear 1, and transmit the driving force to the balance ring 3 through the driving part 62 to drive the balance ring 3 to move. And the balance ring 3 is in guiding cooperation with the guide support 4, that is, the guide support 4 provides guidance and support for the balance ring 3, so that the balance ring 3 can reciprocate along the guide support 4, and ensure that the balance ring 3 moves stably along the set motion trajectory without deviation, shaking, etc., thereby ensuring the accuracy and reliability of the movement of the balance ring 33, and then the stability and reliability of the entire balance shaft frame 100 can be maintained.

[0043] Among them, it can be understood that the rotation directions of the crankshaft drive ring gear 2 and the balance shaft gear 1 are set in opposite directions. When the engine is running, the crankshaft drives the balance shaft gear 1 to rotate through its drive ring gear 2, and it moves synchronously with the crankshaft, but the rotation direction is opposite, ensuring that the balance shaft gear 1 can generate a rotational force equal to the unbalanced force generated by the rotation of the crankshaft, and the action direction is opposite, thereby achieving the balance of the engine.

[0044] Furthermore, the balance shaft gear 1 is configured to drive the balance ring 3 to reciprocate along the guide support 4 when rotating.

[0045] That is to say, when the engine is actually running, the crankshaft drives the balance shaft gear 1 to rotate through its driving gear ring 2. When the balance shaft gear 1 rotates, the balance shaft gear 1 transmits power to the balance ring 3 to drive the balance ring 3 to move along the guide support 4, such as Figure 1As shown, the balancing ring 3 can move in the up and down directions along the guide support 4, and then as the balancing shaft gear 1 continues to rotate, the balancing shaft gear 1 can drive the balancing ring 3 to continuously reciprocate up and down along the guide support 4, thereby effectively balancing the inertia force of the engine and improving the overall operating stability of the engine.

[0046] Among them, it should be noted that the existing engine balance shaft frame is mostly in the form of chain drive and gear drive. The gear drive form has high transmission accuracy, can achieve accurate transmission ratio, and ensure the strict speed relationship between the balance shaft and the crankshaft. And the gear drive has strong bearing capacity, even under high speed and high load conditions, it can maintain stable operation, and it is not easy to fail. At the same time, the gear drive balance shaft has the advantages of high reliability and relatively low space requirements. However, the existing gear drive form is a multi-stage gear drive, the structure of the parts is complex, the gear drive noise is large, and the manufacturing and installation precision requirements are high. The impact and friction of the gear will have a certain impact on the NVH performance. The human ear is very sensitive to the howling noise, which will make the user feel bad subjectively. If the gear manufacturing precision is not high, the tooth shape design is unreasonable or the installation gap is too large, the noise problem will become more serious. The gear backlash and the gear knocking caused by the large inertia put forward higher requirements for the installation and manufacturing process, resulting in inconvenience in manufacturing and increased costs. The higher the gear precision, the higher the cost. The large number of gears will also increase the overall weight of the balance shaft frame, occupy more space, and be unfavorable for installation and layout. Therefore, multi-stage gear transmission is prone to howling and knocking noises in the engine, affecting the NVH performance. It is also heavy, large in overall size, occupies a large space, and has high cost.

[0047] The present invention converts the rotational motion of the balance shaft gear 1 into a linear reciprocating motion of the balance ring 3 by transmitting the power of the balance shaft gear 1 to the balance ring 3 to drive the balance ring 3 to reciprocate along the guide support 4. As a result, the number of gears used is reduced, and the knocking and howling NVH problems caused by multi-stage gear transmission are solved, thereby reducing noise and improving user experience. In addition, since the number of gears used is reduced, the overall weight of the balance shaft frame 100 is also reduced, the compactness of the structure is improved, the manufacturing cost is reduced, and the manufacturing convenience is improved.

[0048] According to the balance shaft frame 100 of the embodiment of the present invention, the balance shaft gear 1 is meshed with the driving gear ring 2 of the crankshaft to receive the power from the crankshaft to drive the balance shaft gear 1 to rotate. When the balance shaft gear 1 rotates, the balance ring 3 is driven to reciprocate along the guide support 4 to convert the rotational motion of the balance shaft gear 11 into a linear reciprocating motion of the balance ring 3, thereby effectively balancing the inertia force of the engine and improving the running stability of the engine. At the same time, the knocking and howling NVH problems caused by the multi-stage gear transmission are solved, thereby reducing noise and improving the user experience. The balance shaft frame 100 has a simple overall structure, low cost, light weight, compact structure, and small space occupation.

[0049] In some embodiments, the balancing shaft frame 100 further includes a transmission member 6 , which is connected to the balancing shaft gear 1 , and the balancing shaft gear 1 is in transmission cooperation with the balancing ring 3 through the transmission member 6 .

[0050] Specifically, Figure 1 and Figure 4 As shown, the balancing shaft frame 100 also includes a transmission member 6, one end of which is connected to the balancing shaft gear 1, and the other end of which is connected to the balancing ring 3, that is, the transmission member 6 is connected between the balancing shaft gear 1 and the balancing ring 3, and the transmission cooperation between the balancing shaft gear 1 and the balancing ring 3 is realized through the transmission member 6. In this way, when the balancing shaft gear 1 rotates, the transmission member 6 can be driven to move, and then the transmission member 6 drives the balancing ring 3 to reciprocate along the guide support 4. Therefore, power transmission from the balancing shaft gear 1 to the balancing ring 3 is realized through the transmission member 6, thereby ensuring the stable movement of the balancing ring 3.

[0051] In some embodiments, Figure 3 As shown, the balance ring 3 has a hollow groove to form an activity space 31. Figure 4 As shown, the transmission member 6 includes a driving portion 62, and the driving portion 62 is used to drive the balance ring 3 to move. Figure 5 As shown, the driving part 62 extends into the activity space 31, that is, the activity space 31 is a space where the driving part 62 can move. When the transmission member 6 moves, it can drive the driving part 62 to move so that the driving part 62 can move in the activity space 31 to drive the balance ring 3 to move.

[0052] Furthermore, the driving part 62 is suitable for pushing the inner wall of the activity space 31 to drive the balance ring 3 to move.

[0053] That is to say, the size of the active space 31 should be compatible with the size of the driving part 62, so that the driving part 62 can extend from one side of the balance shaft gear 1 to the active space 31 and be pressed and contacted with the inner wall of the active space 31, so that when the balance shaft gear 1 rotates to drive the transmission member 6 to move, the driving part 62 can move in the active space 31 to generate thrust, thereby pushing the inner wall of the active space 31 to drive the balance ring 3 to move, thereby realizing the reciprocating motion of the balance ring 3 along the guide support 4.

[0054] In actual design, the driving part 62 of the transmission member 6 can be constructed as a driving pin. The driving pin has a stable structure, high durability and reliability, and is easy to install and maintain. It can increase the service life of the driving part 62 and improve the transmission stability and reliability of the transmission member 6 and the balance ring 3.

[0055] In some embodiments, the activity space 31 is configured as an oblong hole extending along a first direction, and the first direction intersects with the guiding direction of the guide support 4 .

[0056] Specifically, the first direction can be a horizontal direction, for example, the front-to-back direction, the left-to-right direction, etc., that is, the activity space 31 can be constructed as an oblong hole extending in the horizontal direction. In this way, the driving part 62 can be constructed as a cylindrical shape, so that the driving part 62 can move smoothly along the first direction in the oblong hole-shaped activity space 31, wherein the guiding direction of the guide support 4 intersects with the first direction, and can be vertically intersecting or non-vertically intersecting. The guiding direction of the guide support 4 is the movement direction of the balance ring 3, thereby making the movement direction of the driving part 62 different from the movement direction of the balance ring 3, thereby avoiding the reciprocating motion of the balance ring from interfering with the movement direction of the driving part 62 in the activity space 31.

[0057] In addition, the movement of the balancing ring 3 is not only constrained and guided by the guide support 4, but also further restricted by the shape of the activity space 31, which can ensure the stability and controllability of the balancing ring 3 during the reciprocating motion.

[0058] like Figure 3 As shown, the first direction is Figure 3In the left and right directions of the balance ring 3, the left and right ends of the balance ring 3 are constructed as semicircular, the semicircular structures at the two ends are spaced a certain distance apart, and the upper and lower ends of the semicircular structures at the two ends are connected to each other to form an oblong balance ring 3 overall structure, and the interior of the balance ring 3 is hollow to form an oblong hole extending in the left and right directions, and the driving part 62 is constructed as a cylinder and extends into the oblong hole to press against the inner wall of the oblong hole, so that the driving part 62 can move in the oblong hole and slide relative to the inner wall of the oblong hole and generate thrust, pushing the inner wall of the oblong hole to drive the balance ring 3 to move. It can be understood that the length range of the oblong hole in the left and right directions is the displacement that the driving part 62 can move in the activity space 31, that is, the length of the oblong hole in the left and right directions limits the maximum displacement that the driving part 62 can generate in the activity space 31. In actual design, the length of the oblong hole can be flexibly set according to actual conditions and needs to ensure stable and reliable movement of the driving part 62 and the balance ring 3.

[0059] In actual design, the weight of the balancing ring 3 can be calculated based on the imbalance C of the engine and the stroke m=4C / L of the driving part 62. The weight of the balancing ring 3 of the present invention is relatively small, which can greatly reduce the overall weight of the balancing shaft frame 100 and achieve lightweight and miniaturization of the balancing shaft frame 100.

[0060] As well as Figure 3 and Figure 5 As shown, a needle bearing 5 can also be provided on the inner wall of the activity space 31 or on the outer peripheral wall of the driving part 62, so that the outer peripheral wall of the driving part 62 can be in rolling contact with the inner wall of the activity space 31 through the needle bearing 5, so that when the driving part 62 moves in the activity space 31, it can roll and slide more smoothly relative to the inner wall of the activity space 31, thereby reducing the friction between the driving part 62 and the inner wall of the activity space 31, reducing the wear of the driving part 62 and the balance ring 3, and improving the service life of both. At the same time, the needle bearing 5 can also provide stable support for the driving part 62, so that the driving part 62 moves more stably in the activity space 31, the movement efficiency is higher, and the power transmission efficiency is improved.

[0061] In some embodiments, the transmission member 6 further includes a limiting portion 63 , the outer diameter of the limiting portion 63 is greater than the width of the activity space 31 in the second direction, and the second direction intersects with the first direction.

[0062] Specifically, the limiter 63 is used to limit the movement of the balancing ring 3, so that the position of the balancing ring 3 is stable, so as to ensure that the driving part 62 can stably move in the activity space 31, and prevent the balancing ring 3 from deviating, causing the driving part 62 to escape from the activity space 31, and the balancing shaft frame 100 cannot work normally. Figure 5 As shown, the first direction is Figure 5The left and right directions in the diagram, that is, the first direction may be the length direction of the balance ring 3, and the second direction may be a direction intersecting with the left and right directions, which may be perpendicular or non-perpendicular. Figure 5 The second direction shown in is the vertical direction. The limiting portion 63 is constructed in a disc shape and is connected to the driving portion 62. The outer diameter of the limiting portion 63 is greater than the width of the activity space 31 in the vertical direction. In this way, when the driving portion 62 extends into the activity space 31, the limiting portion 63 is located outside the activity space 31. Since the outer diameter of the limiting portion 63 is greater than the width of the activity space 31 in the up and down directions, the balancing ring 3 can be limited to limit the axial movement of the balancing ring 3 along the driving portion 62, thereby preventing the axial deviation of the balancing ring 3 and causing the driving portion 62 to axially escape from the activity space 31. As a result, the stable movement of the balancing ring 3 is ensured and the movement accuracy is improved.

[0063] In some embodiments, the guiding direction is perpendicular to the first direction.

[0064] Specifically, Figure 1 and Figure 3 As shown, the first direction is the horizontal direction, which is also the length direction of the balance ring 3, and the guiding direction is Figure 1 The up and down directions are also the vertical directions of the vehicle, and thus, the guiding direction is perpendicular to the first direction, and the driving part 62 can move in the horizontal direction within the activity space 31 to drive the balancing ring 3 to perform linear reciprocating motion in the up and down directions.

[0065] In some other embodiments, the second direction is perpendicular to the first direction.

[0066] Specifically, Figure 1 and Figure 3 As shown, the first direction is the horizontal direction and the second direction is Figure 1 and Figure 3 The up and down directions in the figure are also the vertical directions of the vehicle. Thus, the second direction is perpendicular to the first direction. The outer diameter of the limit portion 63 is greater than the width of the activity space 31 in the up and down directions, i.e., the second direction. The limit portion 63 is located between the balance ring 3 and the balance shaft gear 1, thereby blocking and limiting the balance ring 3, and limiting the balance ring 3 from deflecting and shaking in the direction of the balance shaft gear 1.

[0067] In some embodiments, the transmission member 6 also includes a first connecting portion 61, which is used to connect the balance shaft gear 1 to ensure that the transmission member 6 can be firmly connected to the balance shaft gear 1, and the balance shaft gear 1 is provided with an eccentrically arranged second connecting portion 11, that is, the second connecting portion 11 is located at a position deviated from the center of the balance shaft gear 1, and the shape and size of the second connecting portion 11 match the shape and size of the first connecting portion 61, so that the first connecting portion 61 can be connected and cooperated with the second connecting portion 11 to realize the connection between the balance shaft gear 1 and the transmission member 6, and then when the balance shaft gear 1 rotates, the driving portion 62 of the transmission member 6 can be driven to move, so that the driving portion 62 can rotate eccentrically around the center of the balance shaft gear 1.

[0068] Specifically, Figure 4 As shown, the transmission member 6 includes a first connecting portion 61, the first connecting portion 61 is connected to one end of the limiting portion 63 close to the balance shaft gear 1, and the second connecting portion 11 is arranged at a position deviating from the center of the balance shaft gear 1, and the first connecting portion 61 is connected and matched with the second connecting portion 11.

[0069] In some embodiments, one of the first connecting portion 61 and the second connecting portion 11 is configured as a connecting hole and the other is configured as a connecting column, and the connecting column is plug-fitted with the connecting hole along the axial direction of the balance shaft gear 1 .

[0070] That is to say, the first connection part 61 can be constructed as a connection hole, and the second connection part 11 can be constructed as a connection column and the connection column extends along the axial direction of the balance shaft gear 1, or the first connection part 61 can be constructed as a connection column and the second connection part 11 can be constructed as a connection hole and the connection hole penetrates along the axial direction of the balance shaft gear 1, and the shape and size of the connection column and the connection hole match, so that the connection column can be smoothly inserted into the connection hole, so as to realize the plug-in fit of the connection column and the connection hole along the axial direction of the balance shaft gear 1. Thus, through the plug-in fit of the connection hole and the connection column, the transmission member 6 is firmly connected to the balance shaft gear 1, so that when the balance shaft gear 1 rotates, the balance shaft gear 1 can stably and reliably drive the driving part 62 to rotate eccentrically.

[0071] Specifically, Figure 1 and Figure 4 As shown, the second connecting portion 11 is constructed as a connecting hole, and the first connecting portion 61 is constructed as a connecting column. The connecting hole passes through the axial direction of the balance shaft gear 1, and the connecting column is inserted into the connecting hole for plug-in fitting, thereby realizing the connection between the transmission member 6 and the balance shaft gear 1.

[0072] In actual design, Figure 4As shown, the radial dimension of the driving part 62 is larger than the radial dimension of the first connecting part 61 to improve the bearing capacity of the driving part 62, and the radial dimensions of the driving part 62 and the first connecting part 61 are smaller than the radial dimension of the limiting part 63, so that the axial limiting of the transmission member 6 can be achieved, the position of the transmission member 6 can be kept stable, and the transmission member 6 can be prevented from being offset toward the direction of the balance shaft gear 1. Among them, the upper and lower middle positions of the driving part 62 can be set as a plane section 621, so that the plane section 621 can always be pressed and contacted with the needle bearing 5 on the inner peripheral wall of the activity space 31, thereby improving the bearing capacity of the needle bearing 5 and preventing the balance ring 3 from being deflected when moving.

[0073] In some embodiments, the balancing ring 3 is provided with a guide fitting portion, the guide support 4 is formed with a guide portion, and the guide fitting portion is slidably fitted along the guide portion.

[0074] That is to say, the guide portion is adapted to the guide matching portion to achieve sliding cooperation between the guide matching portion and the guide portion. The guide portion can have a certain length so that it can guide the guide matching portion to slide along its length direction, thereby enabling the balancing ring 3 to perform stable reciprocating motion along a specific path under the guidance of the guide support 4 without deviation, thereby ensuring the movement stability and accuracy of the balancing ring 3.

[0075] In other embodiments, the guide support 4 is provided with a weight-reducing hole 42, and the weight-reducing hole 42 is used to reduce the weight of the guide support 4, so as to further reduce the weight of the balance shaft frame 100 and achieve lightweight. The weight-reducing hole 42 can be set to one, two, three, four, etc. Figure 8 As shown, three weight-reducing holes 42 are provided, and the three weight-reducing holes 42 are distributed between the two guide parts, and the three weight-reducing holes 42 are distributed at intervals along the sliding direction of the guide parts, so that the weight of the guide support 4 can be reduced at multiple positions respectively. In this way, the structure of the guide support 4 between the weight-reducing holes 42 has a certain structural strength to ensure the rigidity required by the guide support 4, and can make the movement of the balance ring 3 relative to the guide support 4 more stable.

[0076] Among them, the weight-reducing hole 42 can be constructed as a strip slot, a square slot or the like. The weight-reducing hole 42 is formed by digging a slot in the middle area of ​​the guide support 4. The number of weight-reducing holes 42 is not limited to that described in this embodiment and can be selectively set according to the actual structural dimensions.

[0077] In some embodiments, the balancing shaft frame 100 further includes a balancing shaft bracket 7, and the balancing shaft gear 1 is rotatably mounted on the balancing shaft bracket 7. The balancing shaft bracket 7 is a fixed structure for connecting the balancing shaft gear 1. Figure 6 As shown, a gear bearing 82 is provided at the center of the balance shaft gear 1. Figure 7As shown, the balance shaft bracket 7 is provided with a support shaft, and the balance shaft gear 1 is supported and connected to the support shaft through a gear bearing 82, so that the balance shaft gear 1 can rotate relative to the balance shaft bracket 7 after the driving gear ring 2 of the crankshaft rotates.

[0078] In some embodiments, Figure 8 and Fig. 9 As shown, the guide portion is constructed as a guide slot 41, which is open toward the direction of the balancing ring 3 and extends in the up-down direction. It can be understood that the length dimension of the guide slot 41 is the travel range of the balancing ring 3, in other words, the maximum displacement of the balancing ring 3 in the up-down direction.

[0079] like Figure 3 and Fig. 9 As shown, the guide matching portion is constructed as a guide block 32 protruding from the balancing ring 3 toward the guide support 4. Figure 3 and Fig. 9 The guide block 32 shown in the figure is configured as a rectangular block, and may also be configured as a cylindrical block or other shapes. Accordingly, the shape and size of the guide slot 41 are adapted to the shape and size of the guide block 32. Figure 8 and Fig. 9 The guide slot 41 shown in the figure is a rectangular slot, so that the guide block 32 can smoothly extend into the guide slot 41 and slide up and down along the guide slot 41. Therefore, in practice, when the balance shaft gear 1 rotates, the driving part 62 can perform eccentric motion to drive the balance ring 3 to move, so that the guide block 32 of the balance ring 3 performs a linear reciprocating motion up and down in the guide slot 41, thereby realizing the linear reciprocating motion of the balance ring 3 up and down.

[0080] In actual design, Figure 8 and Fig. 9 As shown, a guide bearing 81 can also be provided in the guide groove 41 to reduce the friction between the guide block 32 and the guide groove 41, and ensure that the guide block 32 can slide more smoothly along the guide groove 41 to achieve up and down linear reciprocating motion. The guide bearing 81 can be constructed as a needle bearing, and the needle bearing can be provided on the inner wall of the guide groove 41 to reduce the friction between the guide block 32 and the guide groove 41 through rolling and sliding between the guide block 32 and the needle bearing, and increase the smoothness of the sliding fit between the guide block 32 and the guide groove 41. Of course, the needle bearing can also be provided on the outer peripheral wall of the guide block 32 to reduce the friction between the guide block 32 and the guide groove 41 through rolling and sliding between the inner wall of the guide groove 41 and the needle bearing, and increase the smoothness of the sliding fit between the guide block 32 and the guide groove 41.

[0081] In some embodiments, there are multiple guide matching parts and guide parts, that is, both the guide matching parts and the guide parts can be set to two, three or even more, and the number of guide matching parts corresponds to the number of guide parts, so that multiple guide matching parts can be matched with multiple guide parts one by one, that is, each guide part is slidably matched with the corresponding guide matching part. Therefore, through the sliding cooperation between multiple guide matching parts and multiple guide parts, the movement smoothness of the balance ring 3 can be improved, so that the guide sliding of the balance ring 3 relative to the guide support 4 is more stable and reliable, and it can be prevented from being offset, stuck, etc.

[0082] Specifically, Figure 3 , Figure 8 and Fig. 9 As shown, the guide matching portion and the guide portion are both provided with two, and the two guide matching portions are spaced apart and distributed, as shown in FIG. Figure 3 As shown, the two guide matching parts are distributed at both ends of the length direction of the balancing ring 3, and the two guide parts are distributed at intervals, as shown in FIG. Figure 8 As shown, the two guide parts are distributed at both ends of the length direction of the guide support 4, and the two guide parts extend in the up-down direction, and the two guide matching parts are distributed one-to-one with the two guide parts, so that the guide matching parts can accurately slide and match with the corresponding guide parts.

[0083] In actual design, bolt holes can also be provided on the balancing shaft bracket 7. Thus, during actual assembly, the balancing shaft bracket 7 can be first assembled to the finely machined plane at the bottom of the oil pan, and then the bolts can be passed through the bolt holes for tightening, to ensure a smooth and tilt-free assembly, so as to ensure stable support for the balancing shaft frame 100. Compared with a conventional integrated balancing shaft, the balancing shaft frame 100 of the present invention reduces the balancing shaft mounting housing, thereby further reducing the weight and cost of the balancing shaft frame 100, reducing assembly errors, and reducing the risk of knocking and whistling.

[0084] Then, during the assembly process, the gear bearing 82 and the first connecting portion 61 are inserted into the balance shaft gear 1 by interference hot pressing to form the balance shaft gear 1 assembly, so that the balance shaft gear 1, the gear bearing 82 and the first connecting portion 61 can be ensured to be firmly connected and not slip during operation. After that, the balance shaft gear 1 is assembled to the balance shaft bracket 7 to form a transmission system, and the crankshaft rotation torque is transmitted to the balance shaft frame 100 through the meshing of the balance shaft gear 1 and the drive gear ring 2 of the crankshaft. Compared with the traditional integrated balance shaft, the balance shaft frame 100 of the present invention also reduces the number of bearings, thereby further reducing the cost, as well as the reliability problems and vibration noise problems caused by bearing wear. At the same time, the reduction in the number of bearings will reduce friction losses, which plays a positive role in reducing engine fuel consumption.

[0085] Then, the balance ring 3 can be assembled to the driving part 62 to form a balance shaft frame 100, so as to balance the reciprocating inertia force of the engine. Compared with the traditional integrated balance shaft, the balance shaft frame 100 of the present invention reduces the number of gears, reduces the overall weight of the balance shaft frame 100, and reduces gear noise.

[0086] Finally, the guide bearing 81 can be press-fitted into the guide groove 41 to prevent the guide bearing 81 from coming out during the operation of the balancing shaft frame 100. Then, the guide block 32 can be installed into the guide groove 41, and the guide support 4 can be assembled to the finely machined surface at the bottom of the oil pan and fastened with bolts to ensure a smooth and tilt-free assembly, so as to form a guide system for guiding the balancing ring 3 to perform stable, linear reciprocating motion up and down.

[0087] The engine according to the embodiment of the present invention comprises a crankshaft and a balance shaft frame 100 according to any one of the above embodiments, and the balance shaft gear 1 is meshed with a driving ring gear 2 of the crankshaft.

[0088] Specifically, since the balance shaft gear 1 is meshed with the driving ring gear 2 of the crankshaft, the driving ring gear 2 can transmit power to the balance shaft gear 1 when it rotates to drive the balance shaft gear 1 to rotate, that is, the balance shaft frame 100 receives the unbalanced power from the driving ring gear 2, and then the balance shaft frame 100 converts the rotational motion of the balance shaft gear 1 into the linear reciprocating motion of the balance ring 3, thereby effectively balancing the inertia force of the engine, improving the running stability of the engine, and making the engine run more stably and reliably. At the same time, it also reduces the noise generated during engine operation, improves NVH performance, and improves user experience. In addition, since the balance shaft frame 100 has a simple overall structure and occupies a small space, it also improves the structural compactness of the engine, which is conducive to achieving lightweight engine.

[0089] The present invention also provides a vehicle.

[0090] The vehicle according to the embodiment of the present invention includes the balance shaft frame 100 according to any one of the above embodiments or the engine according to the above embodiments.

[0091] According to the vehicle of the embodiment of the present invention, by providing the above-mentioned balance shaft frame 100 or the engine, the driving stability and comfort of the vehicle are effectively improved, the noise is reduced, and the user experience is improved.

[0092] Among them, the balance shaft gear 1 is meshed with the driving gear ring 2 of the crankshaft to receive the power from the crankshaft to drive the balance shaft gear 1 to rotate. When the balance shaft gear 1 rotates, the balance ring 3 is driven to reciprocate along the guide support 4 to convert the rotational motion of the balance shaft gear 11 into a linear reciprocating motion of the balance ring 3, thereby effectively balancing the inertia force of the engine and improving the running stability of the engine. At the same time, the knocking and howling NVH problems caused by the multi-stage gear transmission are solved, thereby reducing noise and improving user experience. The balance shaft frame 100 has a simple overall structure, low cost, light weight, compact structure, and small space occupation.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A balance shaft frame, characterized in that: include: a balance shaft gear, the balance shaft gear being adapted to mesh with a drive ring gear of the crankshaft; A balancing ring and a guide support, wherein the balancing shaft gear is in transmission cooperation with the balancing ring, and the balancing ring is in guiding cooperation with the guide support; Wherein, the balance shaft gear is configured to drive the balance ring to reciprocate along the guide support when rotating.

2. The balance shaft frame according to claim 1, characterized in that: It also includes a transmission member, which is connected to the balance shaft gear, and the balance shaft gear is in transmission cooperation with the balance ring through the transmission member.

3. The balance shaft frame according to claim 2, characterized in that: An activity space is formed in the balancing ring, and the transmission member includes a driving part, which extends into the activity space and is suitable for pushing the inner wall of the activity space to drive the balancing ring to move.

4. The balance shaft frame according to claim 3, characterized in that: The activity space is configured as an oblong hole extending along a first direction, and the first direction intersects with a guiding direction of the guide support.

5. The balance shaft frame according to claim 4, characterized in that: The transmission member further includes a limiting portion, an outer diameter of which is greater than a width of the activity space in a second direction, and the second direction intersects with the first direction.

6. The balance shaft frame according to claim 5, characterized in that: The guiding direction is perpendicular to the first direction; And / or, the second direction is perpendicular to the first direction.

7. The balance shaft frame according to claim 3, characterized in that: The transmission member further comprises a first connection portion, the balance shaft gear is provided with an eccentrically arranged second connection portion, and the first connection portion is connected and matched with the second connection portion.

8. The balance shaft frame according to claim 7, characterized in that: One of the first connecting portion and the second connecting portion is configured as a connecting hole and the other is configured as a connecting column, and the connecting column is plug-fitted with the connecting hole along the axial direction of the balance shaft gear.

9. The balancing shaft frame according to any one of claims 1 to 8, characterized in that: The balancing ring is provided with a guide matching portion, the guide support is formed with a guide portion, and the guide matching portion is slidably matched along the guide portion; And / or, the guide support is provided with a weight-reducing hole; And / or, it also includes a balance shaft bracket, and the balance shaft gear is rotatably mounted on the balance shaft bracket.

10. The balance shaft frame according to claim 9, characterized in that: The guide portion is configured as a guide slot, the guide matching portion is configured as a guide block protruding from the balance ring toward the guide support, the guide block extends into the guide slot and slides along the guide slot; And / or, there are multiple guide matching parts and multiple guide parts, and the multiple guide matching parts match with the multiple guide parts in a one-to-one correspondence.

11. An engine, characterized in that: The invention comprises a crankshaft and a balancing shaft frame according to any one of claims 1 to 10, wherein the balancing shaft gear is meshed with a driving ring gear of the crankshaft.

12. A vehicle, characterized in that: The invention comprises the balance shaft frame according to any one of claims 1 to 10 or the engine according to claim 11.

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