Balance shaft framework, engine and vehicle

Abstract

The utility model 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 ring is in gear transmission fit with the balance shaft, and the balance ring is provided with a first guide part; the guide support is provided with a second guide part, the first guide part is in guide fit with the second guide part, the balance shaft gear is suitable for driving the balance ring to reciprocate along the second guide part when rotating, and a bearing structure is arranged at the matching position of the first guide part and the second guide part. According to the balance shaft framework, the balance shaft gear, the balance ring and the guide support are matched for use, so that the rotary motion of the balance shaft gear can be converted into the reciprocating motion of the balance ring, the balance rate of inertia force during operation of an engine can be met, the radiation noise of the engine can be effectively reduced, the NVH performance of the engine can be improved, and the service life of the engine is prolonged. The subjective feeling of a user can be improved, the overall structure is simple, and the cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle manufacturing technical field especially relates to a balance shaft frame and have the engine with the balance shaft frame and have the vehicle with the engine. BACKGROUND

[0002] The vibration and noise level of engine has become one of important evaluation indexes of engine comprehensive performance. Improving vibration quality and reducing cost is the main way of improving engine market competitiveness and is also an important way of reducing vehicle vibration. Balance shaft technology has been widely applied in domestic and foreign vehicle models. In four-cylinder engine, second-order reciprocating inertia force is balanced, and NVH problems such as booming in the car caused by excessive low-frequency vibration are reduced.

[0003] The existing engine balance shaft transmission forms are mainly chain transmission and gear transmission. The chain transmission balance shaft has the problem of chain order noise NVH, and the chain transmission has high requirements for lubrication and cost. The gear balance shaft is multi-stage gear transmission, and whistling and knocking noise is easy to occur in the engine, which reduces the subjective feeling of users, and there is room for improvement. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems in the prior art. Therefore, the utility model provides a balance shaft frame, which can balance the inertia force during engine operation, effectively reduce engine radiation noise, improve the NVH performance of the engine, and improve the subjective feeling of users.

[0005] According to the balance shaft frame of the utility model embodiment, the balance shaft gear is used for meshing with the driving gear ring of the crankshaft, the balance ring is in transmission cooperation with the balance shaft gear, the balance ring is provided with a first guide part, the guide support is provided with a second guide part, the first guide part is in guide cooperation with the second guide part, the balance shaft gear is suitable for driving the balance ring to reciprocate along the second guide part when rotating, and the cooperation position of the first guide part and the second guide part is provided with a bearing structure.

[0006] According to the balance shaft frame of the utility model embodiment, the cooperation of the balance shaft gear, the balance ring and the guide support can convert the rotary motion of the balance shaft gear into the reciprocating motion of the balance ring. The motion of the balance ring is smooth and stable, can balance the inertia force during engine operation, can reduce the noise of multi-stage gear transmission in the existing engine balance shaft frame, can reduce the phenomenon of whistling and knocking noise in the engine, can improve the NVH performance of the engine, can improve the subjective feeling of users, and has simple overall structure, convenient installation and low cost.

[0007] According to the balance axle framework of some embodiments of the utility model, one of the first guide part and the second guide part is structured as a guide block and the other is structured as a guide chute, the guide block is slidably matched along the guide chute, and the bearing structure is arranged between the outer peripheral wall of the guide block and the inner wall of the guide chute.

[0008] According to the balance axle framework of some embodiments of the utility model, the guide chute comprises two oppositely distributed chute inner walls, and the guide block is slidably matched with the two chute inner walls respectively.

[0009] The bearing structure is arranged between the guide block and at least one of the chute inner walls.

[0010] According to the balance axle framework of some embodiments of the utility model, the guide chute extends along a first direction, and the two chute inner walls oppositely distribute along a second direction, and the first direction is perpendicular to the second direction.

[0011] According to the balance axle framework of some embodiments of the utility model, at least one of the two chute inner walls is provided with the bearing structure.

[0012] And / or, the outer peripheral wall of the guide block is provided with the bearing structure.

[0013] According to the balance axle framework of some embodiments of the utility model, the bearing structure is structured as a needle bearing.

[0014] Each of the chute inner walls is provided with a plurality of needle bearings, and the plurality of needle bearings are sequentially distributed along the length direction of the chute inner wall.

[0015] And / or, the outer peripheral wall of the guide block is provided with a plurality of needle bearings, and the plurality of needle bearings are sequentially distributed along the circumferential direction of the guide block.

[0016] According to the balance axle framework of some embodiments of the utility model, the first guide part and the second guide part are both multiple, and the plurality of first guide parts and the plurality of second guide parts are one-to-one correspondingly guided and matched, and the bearing structure is arranged between each first guide part and the corresponding second guide part.

[0017] According to the balance axle framework of some embodiments of the utility model, the guide support is provided with at least one lightening hole.

[0018] And / or, further comprising a transmission member, and the balance axle gear is transmissionally matched with the balance ring through the transmission member.

[0019] And / or, further comprising a balance axle support, and the balance axle gear is rotatably installed on the balance axle support.

[0020] The utility model also proposes an engine.

[0021] The engine according to the utility model embodiment is provided with the balance shaft frame of any one of the above embodiments.

[0022] The utility model also proposes a vehicle.

[0023] The vehicle according to the utility model embodiment is provided with the engine of the above embodiment.

[0024] The vehicle and the balance shaft frame and the engine have the same advantages as the prior art, and details are not repeated here.

[0025] The additional aspects and advantages of the utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and / or additional aspects and advantages of the utility model will become apparent and more readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 It is the structure schematic view of balance shaft frame according to an embodiment of the utility model;

[0028] Figure 2 It is the structure schematic view of guide support of balance shaft frame according to the utility model embodiment;

[0029] Figure 3 It is the structure schematic view of balance circle of balance shaft frame according to the utility model embodiment;

[0030] Figure 4 It is the structure schematic view of transmission part of balance shaft frame according to the utility model embodiment;

[0031] Figure 5 It is the structure schematic view of balance shaft gear of balance shaft frame according to the utility model embodiment;

[0032] Figure 6 It is the structure schematic view of balance shaft support of balance shaft frame according to the utility model embodiment;

[0033] Figure 7 It is the structure schematic view of guide support and balance circle cooperation of balance shaft frame according to another embodiment of the utility model;

[0034] Figure 8 It is the structure schematic view of balance shaft frame and drive gear ring of crankshaft according to the utility model embodiment.

[0035] Reference signs:

[0036] Balance shaft frame 100,

[0037] Balance shaft gear 1, mounting hole 11, gear bearing 12, balance ring 2, first guide part 21, guide block 22, guide groove 23, guide support 3, second guide part 31, guide sliding groove 32, sliding groove inner wall 321, weight-reducing hole 33, second mounting part 34, bearing structure 4, transmission part 5, first shaft section 51, second shaft section 52, flat surface 521, balance shaft support 6, support shaft 61, first mounting part 62, drive gear ring 200. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0039] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more.

[0040] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] Unless otherwise specified, the front-rear direction in the present application is the longitudinal direction of the vehicle, i.e. the X direction; the left-right direction is the lateral direction of the vehicle, i.e. the Y direction; and the up-down direction is the vertical direction of the vehicle, i.e. the Z direction.

[0042] The following description will be made with reference toFigures 1-8 The balance shaft frame 100 according to the embodiment of the utility model, through setting the cooperation of balance shaft gear 1, balance ring 2 and guide support 3, can make the rotary motion of balance shaft gear 1 into reciprocating motion of balance ring 2, can realize the balance of inertia force when the engine runs, and can reduce the noise when the multistage gear transmission in the existing engine balance shaft frame 100, thereby reducing the phenomenon that the screeching and knocking noise easily appear in the engine, improving the NVH performance of the engine, can improve the subjective feeling of the user, and the overall structure is simple, convenient to install and low in cost.

[0043] As shown in Figures 1-8 The balance shaft frame 100 according to one embodiment of the utility model, comprising: balance shaft gear 1, balance ring 2 and guide support 3.

[0044] Balance shaft gear 1 is used for engaging with the driving gear ring 200 of the crankshaft, balance ring 2 is in transmission cooperation with balance shaft gear 1, balance ring 2 is provided with a first guide part 21, guide support 3 is provided with a second guide part 31, the first guide part 21 is in guide cooperation with the second guide part 31, balance shaft gear 1 is suitable for driving balance ring 2 to reciprocate along the second guide part 31 when rotating, and the cooperation part of the first guide part 21 and the second guide part 31 is provided with a bearing structure 4.

[0045] Specifically, as shown in Figure 8 The balance shaft gear 1 is engaged with the driving gear ring 200 of the crankshaft for transmission, so that the driving gear ring 200 of the crankshaft moves to drive the balance shaft gear 1 to move, so as to realize the power transmission from the crankshaft to the balance shaft frame 100. And the balance shaft gear 1 is also connected with the balance ring 2, which can drive the balance ring 2 to move correspondingly after the balance shaft gear 1 rotates. And the balance ring 2 is in guide cooperation with the second guide part 31 of the guide support 3 through the first guide part 21, wherein the guide support 3 is a fixed end, and the balance ring 2 can reciprocate along the second guide part 31 relative to the guide support 3. In this way, through the cooperation of the above structure, the reciprocating motion of the balance ring 2 driven by the driving gear ring 200 of the crankshaft can be realized.

[0046] And the reciprocating motion of the balance ring 2 is provided with a stable path through the guide cooperation of the first guide part 21 and the second guide part 31, which ensures that the balance ring 2 will not deviate from the predetermined trajectory when moving, thereby ensuring the accuracy and reliability of the movement. And the first guide part 21 and the second guide part 31 are in sliding cooperation through the bearing structure 4, which can reduce friction and wear, improve the smoothness and durability of the movement, and the bearing structure 4 can bear the radial and axial loads generated by the balance ring 2 during the reciprocating motion, ensuring the smooth movement of the balance ring 2. And the overall structure is simple, convenient to assemble.

[0047] It should be noted that when the engine is working, the piston reciprocates in the cylinder in a high-speed linear motion, which generates a large inertial force, most of which can be balanced by the counterweight of the crankshaft, and the remaining part of the inertial force is balanced and offset by the balance shaft frame 100 to achieve the balance of the engine.

[0048] The rotation direction of the driving gear ring 200 of the crankshaft and the balance shaft gear 1 is opposite, and when the engine is running, the crankshaft drives the balance shaft gear 1 to rotate through its driving gear ring 200, which synchronously moves with the crankshaft but in the opposite direction, ensuring that the balance shaft gear 1 can generate a rotating force equal to the unbalanced force generated by the rotation of the crankshaft, and the direction of action is opposite, thereby achieving the balance of the engine.

[0049] Among them, the existing engine balance shaft frame is mainly in the form of chain transmission and gear transmission, wherein the chain transmission has the advantages of strong bearing capacity, good center distance adaptability, high working reliability, long service life and the like, but at the same time has the disadvantages of large vibration noise and vibration impact, and the chain transmission has high lubrication requirements. The gear transmission has high transmission accuracy, and compared with the chain transmission, the gear transmission can realize accurate transmission ratio and ensure the strict speed relationship between the balance shaft and the crankshaft. The gear transmission has strong bearing capacity, and in the case of high speed and high load, the gear transmission is stable and is not easy to appear transmission failure. The gear transmission balance shaft has complex structure, and generally includes balance shaft shell, bearing, shaft, and various gear parts, and has complex structure, high cost, and is easy to appear screeching and knocking noise. Therefore, the manufacturing and installation precision of the gear is high, the impact and friction of the gear will have a certain influence on NVH, and if the manufacturing precision of the gear is not high, the gear design is unreasonable or the installation gap is too large, the noise problem will be more serious. The higher the gear precision is, the higher the cost of the balance shaft frame is.

[0050] According to the balance shaft frame 100 of the embodiment of the utility model, through the cooperation of the balance shaft gear 1, the balance ring 2 and the guide support 3, the rotary motion of the balance shaft gear 1 can be converted into the reciprocating motion of the balance ring 2, the inertial force during the operation of the engine can be balanced, the noise during the multi-stage gear transmission in the existing engine balance shaft frame 100 can be reduced, the phenomenon of screeching and knocking noise in the engine can be reduced, the NVH performance of the engine can be improved, the subjective feeling of the user can be improved, and the structure is simple, convenient to install, low in cost and compact in overall structure. Small space occupation.

[0051] In some embodiments, one of the first guide portion 21 and the second guide portion 31 is configured as a guide block 22 and the other is configured as a guide slot 32, and the bearing structure 4 is arranged between the outer peripheral wall of the guide block 22 and the inner wall of the guide slot 32.

[0052] That is, the first guide portion 21 can be configured as a guide block 22, and the second guide portion 31 can be configured as a guide slot 32, or the first guide portion 21 can be configured as a guide slot 32, and the second guide portion 31 can be configured as a guide block 22. Both of these two arrangements can achieve the sliding fit of the first guide portion 21 and the second guide portion 31, and the arrangement is flexible and has multiple options.

[0053] Specifically, in the present embodiment, as shown in Figure 2 The guide support 3 is provided with the second guide portion 31 configured as a guide slot 32, as shown in Figure 3 The balance ring 2 is provided with the first guide portion 21 configured as a guide block 22, and the bearing structure 4 is located between the guide block 22 and the guide slot 32, wherein at least part of the guide block 22 extends into the guide slot 32 to achieve the sliding of the guide block 22 along the guide slot 32, and through the sliding fit of the bearing structure 4 relative to the guide slot 32, the reliability of the sliding fit of the guide block 22 and the guide slot 32 can be improved. And the overall structure is simple and easy to process.

[0054] In actual design, the bearing structure 4 can be arranged on the outer peripheral wall of the guide block 22, or the bearing structure 4 can be arranged on the inner wall of the guide slot 32, both of which can improve the smoothness of the sliding fit between the guide block 22 and the guide slot 32 through the bearing structure 4. The arrangement is diverse and can be flexibly selected.

[0055] In some embodiments, the guide slot 32 includes two oppositely distributed slot inner walls 321, and the guide block 22 is in sliding fit with the two slot inner walls 321 respectively.

[0056] Specifically, as shown in Figure 2 The guide slot 32 includes two slot inner walls 321 oppositely distributed, and correspondingly, the guide block 22 also includes two sliding side walls, and the two sliding side walls are in sliding fit with the two slot inner walls 321 respectively, so that when the guide block 22 and the guide slot 32 slide relative to each other, the two sliding side walls reciprocate relative to the two slot inner walls 321 respectively, and the sliding fit of the guide block 22 is smoother.

[0057] Further, the guide block 22 and the guide slot 32 are matched in structure, wherein the guide block 22 can be configured as a square block structure, the guide slot 32 can be configured as a square slot, the size of the guide slot 32 is larger than that of the guide block 22, which facilitates the plug-in installation between the guide block 22 and the guide slot 32, and the side of the guide slot 32 facing the guide block 22 is open, which can realize the installation of the guide block 22 and the guide slot 32, and can avoid the guide block 22 to realize the sliding of the guide block 22 relative to the guide slot 32.

[0058] Wherein, the guide block 22 and at least one of the slide slot inner wall 321 are provided with bearing structure 4, that is, the guide block 22 and one of the slide slot inner wall 321 can be provided with bearing structure 4 for sliding fit, or the guide block 22 and the two slide slot inner wall 321 can be provided with bearing structure 4 for sliding fit. These two kinds of setting mode can realize the sliding fit of the guide block 22 and the guide slot 32, improve the smoothness and movement efficiency of the balance ring 2 reciprocating motion.

[0059] Therefore, through the sliding fit of the guide block 22 and the two slide slot inner walls 321 respectively, the sliding synchronization of the two sides of the guide block 22 is high, the sliding process is smooth, and the movement transmission efficiency of the balance shaft gear 1 to the balance ring 2 is fast and reliable.

[0060] In some embodiments, the guide slot 32 extends along a first direction, and the two slide slot inner walls 321 are relatively distributed along a second direction, and the first direction is perpendicular to the second direction.

[0061] Specifically, the guide slot 32 extends along a first direction, which can make the guide block 22 slide along the first direction relative to the guide slot 32, and the two slide slot inner walls 321 extend along the first direction, and are relatively distributed along the second direction. The space formed by the two slide slot inner walls 321 spaced apart along the second direction is used for the installation of the guide block 22. The two slide slot inner walls 321 are respectively in sliding fit with the two sides of the guide block 22, which can limit the guide block 22 along the second direction, can ensure the reliable installation of the guide block 22 and the guide slot 32, and can make the guide block 22 run more stably and reliably relative to the guide slot 32 along the first direction.

[0062] Wherein, the first direction can be the up-down direction, and the second direction can be the horizontal direction, which includes the left-right direction and the front-back direction.

[0063] And at least part of the guide block 22 extends into the guide slot 32 along the open direction of the guide slot 32, which can make the structure of the guide block 22 and the guide slot 32 coincide to improve the installation reliability and the stability of the guide block 22 and the guide slot 32.

[0064] In some embodiments, at least one of the two chute inner walls 321 is provided with a bearing structure 4, that is, the bearing structure 4 can be arranged on one of the two chute inner walls 321, so that one of the two chute inner walls 321 and one side of the guide block 22 are in sliding fit through the bearing structure 4, and the other is in contact and friction fit with the guide block 22. Alternatively, the bearing structure 4 can be arranged on both of the two chute inner walls 321, so that the two chute inner walls 321 and both sides of the guide block 22 are in sliding fit through the bearing structure 4. The arrangement is various and can be flexibly selected.

[0065] In the present embodiment, as shown in Figure 2 both of the two chute inner walls 321 are connected with the bearing structure 4. The bearing structure 4 has good sliding property and small friction. In this way, the sliding of both sides of the guide block 22 is highly synchronized, and the sliding process is smoother. Moreover, the movement transmission efficiency from the balance shaft gear 1 to the balance ring 2 is fast and reliable, and the inertial force during engine operation can be effectively balanced.

[0066] The bearing structure 4 is distributed along the extension direction of the chute inner wall 321, so that the friction of the guide block 22 relative to the chute inner wall 321 is consistent, and the sliding smoothness and stability of the two are improved.

[0067] In other embodiments, the outer peripheral wall of the guide block 22 is provided with a bearing structure 4, that is, the bearing structure 4 can be arranged on the corresponding side of the guide block 22 relative to at least one of the two chute inner walls 321, or the bearing structure 4 can be arranged on the outer peripheral wall of the guide block 22. The arrangement is various and can be flexibly selected.

[0068] Specifically, as shown in Figure 7 the guide block 22 includes two sliding side walls, and the two sliding side walls are oppositely distributed. The bearing structure 4 can be arranged on both of the two sliding side walls, and the two chute inner walls 321 are not provided with the bearing structure 4. In this way, the guide block 22 is in sliding fit with the two chute inner walls 321 through the bearing structure 4, and the sliding fit of the guide block 22 and the guide chute 32 can be achieved.

[0069] Therefore, the structure of the guide block 22 is small, and the size of the guide chute 32 is large. By arranging the bearing structure 4 on the guide block 22, the overall number of the bearing structure 4 can be reduced, so that the overall structure is more simple, and the weight of the balance shaft frame 100 can be reduced. The wear and fatigue between the guide block 22 and the guide chute 32 can be reduced, and the service life of the whole can be prolonged. Moreover, the number of the bearing structure 4 can be reduced, the cost can be saved, the economic benefit can be improved, and the detection and maintenance can be easier, and the reliability can be more easily guaranteed.

[0070] In some embodiments, the bearing structure 4 is configured as a needle bearing, which is designed with its thin and long rollers (needles) to be able to provide higher load bearing capacity in a smaller cross-section.

[0071] Each of the inner walls 321 of the chute is provided with a plurality of needle bearings, as shown in Figure 1 and Figure 2 The plurality of needle bearings are sequentially distributed along the length direction of the inner wall 321 of the chute, so that the inner wall 321 of the chute has needle bearings, and the plurality of needle bearings are uniformly distributed, which can provide a more uniform support and sliding surface, reduce friction and resistance during sliding, and make sliding smoother. The number of the plurality of needle bearings is not limited, which is related to the length of the inner wall 321 of the chute to ensure reliable operation in the length direction of the inner wall 321 of the chute.

[0072] Further, when the guide block 22 slides along the plurality of needle bearings in the length direction of the inner wall 321 of the chute, the plurality of needle bearings are respectively in rolling contact with the guide block 22, which can realize the rapid sliding of the guide block 22 relative to the inner wall 321 of the chute.

[0073] In other embodiments, the outer peripheral wall of the guide block 22 is provided with a plurality of needle bearings, which are sequentially distributed along the circumference of the guide block 22, i.e. the outer periphery of the guide block 22 is provided with a plurality of needle bearings, and the plurality of needle bearings are uniformly distributed, which can provide a more uniform support and sliding surface. The number of the plurality of needle bearings is not limited, which is related to the outer peripheral size of the guide block 22 to ensure reliable operation of the guide block 22 and the inner wall 321 of the chute.

[0074] Further, when the guide block 22 slides along the plurality of needle bearings in the length direction of the inner wall 321 of the chute, the plurality of needle bearings are respectively in rolling contact with the inner wall 321 of the chute, which can realize the rapid sliding of the guide block 22 relative to the inner wall 321 of the chute.

[0075] Thus, one of the inner wall 321 of the chute and the guide block 22 is provided with a plurality of needle bearings, which can realize the sliding fit of the inner wall 321 of the chute and the guide block 22, and the plurality of needle bearings respectively have stable support effect, which can reduce errors caused by vibration and impact, thereby improving the precision and stability of the entire balance shaft frame 100. Compared with the sliding contact mode, it can significantly reduce friction and wear, prolong the service life of the chute and the sliding component, and the radial structure of the needle bearing is compact, so that the outer diameter is minimized under the same inner diameter size and load capacity, thereby optimizing the space utilization.

[0076] In some embodiments, the first guide part 21 and the second guide part 31 are both multiple, and the multiple first guide parts 21 and the multiple second guide parts 31 are one-to-one correspondingly guided and matched, and a bearing structure 4 is arranged between each first guide part 21 and the corresponding second guide part 31, that is, the balance ring 2 and the guide support 3 are guided and matched one-to-one by multiple groups of first guide parts 21 and second guide parts 31, which can make the guiding sliding of the balance ring 2 relative to the guide support 3 more stable and reliable.

[0077] Specifically, the first guide part 21 and the second guide part 31 are both provided as two, the two first guide parts 21 are distributed as shown in Figure 3 The two first guide parts 21 are distributed at both ends of the length direction of the balance ring 2, the two second guide parts 31 are distributed as shown in Figure 2 The two second guide parts 31 are distributed at both ends of the length direction of the guide support 3, and the two second guide parts 31 are one-to-one correspondingly distributed with the two first guide parts 21, which is beneficial to rapid assembly and has high assembly precision.

[0078] And a bearing structure 4 is arranged between each first guide part 21 and the second guide part 31, when in operation, the two first guide parts 21 are guided and slid by one bearing structure 4 and the second guide part 31 respectively, which can make the stress on both sides consistent when the balance ring 2 slides relative to the guide support 3, and can improve the balance of the movement of the balance ring 2, thereby improving the efficiency and reliability of the movement.

[0079] Among them, the number of the first guide part 21 and the second guide part 31 is not limited to the embodiment described, but can also be set to three, four, etc.

[0080] Therefore, by setting multiple groups of first guide parts 21 and second guide parts 31 to be one-to-one correspondingly guided and matched, they can work together to realize the guiding function to ensure the accurate movement of the balance ring 2 on the predetermined path.

[0081] In some embodiments, the guide support 3 is provided with at least one lightening hole 33, and the lightening hole 33 is used to reduce the weight of the guide support 3, wherein the lightening hole 33 can be provided as one, two, three, four, etc., as shown in Figure 2 The three lightening holes 33 are distributed between the two second guide parts 31, and the three lightening holes 33 are distributed as shown in the sliding direction of the second guide part 31, which can reduce the weight of the guide support 3 at multiple positions, so that the structure between the lightening holes 33 of the guide support 3 has a certain structural strength to ensure the required rigidity of the guide support 3, and the movement of the balance ring 2 relative to the guide support 3 is more stable.

[0082] The weight-reducing hole 33 can be configured as a strip-shaped slot hole, and the weight-reducing hole 33 is formed by slotting in the middle region of the guide support 3. The number of weight-reducing holes 33 is not limited to the number described in the embodiment, and can be selected according to the actual structure size.

[0083] Therefore, by arranging at least one weight-reducing hole 33, the weight of the guide support 3 can be reduced under the premise of meeting the mechanical performance of the guide support 3, so as to meet the lightweight design requirement.

[0084] In some embodiments, the balance shaft frame 100 further comprises a transmission member 5, the balance shaft gear 1 is in transmission cooperation with the balance ring 2 through the transmission member 5, the transmission member 5 is used to realize the transmission connection between the balance shaft gear 1 and the balance ring 2, and the movement of the balance shaft gear 1 can be transmitted to the balance ring 2.

[0085] Specifically, as shown in Figure 1 , the transmission member 5 is arranged eccentrically on the balance shaft gear 1. In the radial direction of the balance shaft gear 1, an installation hole 11 is arranged outside the center of the balance shaft gear 1, and the transmission member 5 is installed in the installation hole 11. One end of the transmission member 5 is connected with the installation hole 11, and the other end of the transmission member 5 is in transmission cooperation with the balance ring 2. When the driving gear 200 of the crankshaft rotates to drive the balance shaft gear 1 to rotate, the transmission member 5 moves eccentrically with the balance shaft gear 1, and the transmission member 5 drives the balance ring 2 to slide reciprocatingly relative to the guide support 3. The reciprocating sliding of the balance ring 2 is a straight line motion up and down. That is, through the transmission member 5, the rotary motion of the balance shaft gear 1 can be converted into the straight line motion of the balance ring 2.

[0086] The transmission member 5 is configured as a shaft structure, as shown in Figure 4 , the transmission member 5 comprises a first shaft segment 51 and a second shaft segment 52. The first shaft segment 51 is connected with the balance shaft gear 1, and the second shaft segment 52 is connected with the balance ring 2. The second shaft segment 52 is a guide portion, as shown in Figure 3 , the balance ring 2 is provided with a guide groove 23, and the guide portion of the transmission member 5 extends into the guide groove 23. The guide groove 23 is configured as a strip-shaped groove, and the two ends of the strip-shaped groove are arc-shaped surfaces. When the transmission member 5 moves eccentrically with the balance shaft gear 1, the guide portion of the transmission member 5 moves along the guide groove 23 to drive the balance ring 2 to move linearly.

[0087] A needle bearing is arranged between the balance ring 2 and the transmission member 5. The needle bearing can improve the smoothness and reliability of the reciprocating motion between the balance ring 2 and the transmission member 5. The needle bearing can be arranged only on the balance ring 2 or only on the transmission member 5, and the arrangement mode is various and can be selected flexibly.

[0088] As shown in Figure 4As shown, the middle of the guide part of the transmission member 5 is a flat surface 521, and both ends are semicircles, which cooperate with the balance ring 2 through the guide part. The flat surface 521 can ensure that the transmission member 5 is always in contact with the needle bearing, thereby improving the load capacity of the needle bearing, avoiding the running deflection of the balance ring 2, and improving the running accuracy and stability of the balance ring 2.

[0089] The balance shaft frame 100 further comprises a balance shaft support 6, and the balance shaft gear 1 is rotatably mounted on the balance shaft support 6. The balance shaft support 6 is a fixed structure and is used for connecting the balance shaft gear 1, as shown in Figure 5 As shown, the center of the balance shaft gear 1 is provided with a gear bearing 12, as shown in Figure 6 As shown, the balance shaft support 6 is provided with a support shaft 61, and the balance shaft gear 1 is supported and connected with the support shaft 61 through the gear bearing 12. In this way, after the driving gear ring 200 of the crankshaft rotates, the balance shaft gear 1 rotates relative to the balance shaft support 6.

[0090] The bottom of the balance shaft support 6 is provided with a plurality of first mounting portions 62, which are used for connecting and fixing the balance shaft support 6. As shown in Figure 6 The first mounting portion 62 is two, and the two first mounting portions 62 are distributed at intervals. The bottom of the guide support 3 is provided with a plurality of second mounting portions 34, which are used for connecting and fixing the guide support 3. As shown in Figure 2 The second mounting portion 34 is two, and the two second mounting portions 34 are distributed at intervals.

[0091] During installation, the balance shaft support 6 is assembled to the bottom finish machining plane 521 of the oil pan through the two first mounting portions 62 and is bolted, so as to ensure that the assembly is flat and has no inclination, thereby forming a support system for supporting the overall balance structure. Compared with the general integrated balance shaft frame 100, the balance shaft mounting shell is reduced, the weight and cost of the balance shaft frame 100 are reduced, the assembly error is reduced, the risk of knocking and whistling is reduced, the transmission member 5 is assembled into the balance ring 2, the gear bearing 12 and the transmission member 5 are respectively shrink-fitted and hot-pressed into the balance shaft gear 1, the shrink-fitting cooperation can ensure that the gear bearing 12 and the transmission member 5 do not slip during operation, the balance shaft gear 1 is assembled to the finish machining support shaft 61 of the balance shaft support 6, which is used for transmitting the rotation torque of the crankshaft to the balance shaft frame 100. Compared with the integrated balance shaft, the number of bearings is reduced, the cost is reduced, and the reliability problem and the vibration and noise problem caused by bearing wear are reduced. At the same time, the reduction of the number of bearings reduces the friction loss, which plays a positive role in reducing the oil consumption of the engine.

[0092] Two bearing structures 4 are respectively interference-pressed into the second guide portions 31 of the guide support 3 to avoid the guide bearing from falling off during operation, and the two guide blocks 22 of the balance ring 2 are inserted into the corresponding second guide portions 31, the guide support 3 is assembled to the oil pan bottom finish machining plane 521 through the two second mounting portions 34 and is locked by bolts, so that the assembly is flat and free of inclination.

[0093] The utility model discloses still propose a kind of engine.

[0094] According to the engine of the utility model embodiment, the balance shaft frame 100 is connected in the engine, and part of inertial force of the engine can be balanced. The rotary motion of the balance shaft gear 1 is converted into reciprocating motion of the balance ring 2 by cooperation of the balance shaft gear 1, the balance ring 2 and the guide support 3, the inertial force during operation of the engine can be balanced, noise during multi-stage gear transmission in the existing balance shaft frame 100 of the engine can be reduced, the phenomenon of screeching and knocking noise prone to occur in the engine is reduced, the NVH performance of the engine is improved, and subjective feeling of users can be improved.

[0095] It should be noted that the mounting assembly of the balance shaft frame 100 has small volume and is arranged below the third main bearing seat (i.e., at the central position of the crankshaft in the axial direction), so that the problem of large volume and inconvenient arrangement of the balance shaft frame 100 at the present stage can be solved, and the moment of force can be ensured to be centered, no additional overturning moment is generated, and no double-axle symmetrical design is needed to balance the overturning moment. The balance shaft frame 100 is arranged in the oil pan, oil splashing lubrication in the oil pan is used, no oil channel arrangement in the shell is needed, lubricating oil in the oil pan is used for lubrication, the balance shaft frame 100 is convenient to disassemble and check, and installation precision is easier to control.

[0096] The utility model discloses still propose a kind of vehicle.

[0097] According to the vehicle of the utility model embodiment, the engine of the above embodiment is included, the balance shaft frame 100 is arranged in the engine, the balance shaft frame 100 is provided with the balance shaft gear 1, the balance ring 2 and the guide support 3, the rotary motion of the balance shaft gear 1 is converted into reciprocating motion of the balance ring 2 by cooperation of the above three structures, the inertial force during operation of the engine can be balanced, noise during multi-stage gear transmission in the existing balance shaft frame 100 of the engine can be reduced, the phenomenon of screeching and knocking noise prone to occur in the engine is reduced, the NVH performance of the engine is improved, the performance of the engine is improved, the overall performance of the vehicle can be improved, and subjective feeling of users can be improved.

[0098] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0099] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A balance shaft frame, characterized in that, include: A balance shaft gear, which meshes with a drive gear ring of a crankshaft; A balance ring, which is geared to the balance shaft, and the balance ring is provided with a first guide portion; The guide support is provided with a second guide portion, and the first guide portion and the second guide portion are guided and engaged. When the balance shaft gear rotates, it is adapted to drive the balance ring to reciprocate along the second guide portion, and a bearing structure is provided at the engagement point between the first guide portion and the second guide portion.

2. The balance shaft frame according to claim 1, characterized in that, One of the first guide portion and the second guide portion is configured as a guide block and the other is configured as a guide groove. The guide block slides along the guide groove, and the bearing structure is disposed between the outer peripheral wall of the guide block and the inner wall of the guide groove.

3. The balance shaft frame according to claim 2, characterized in that, The guide groove includes two oppositely distributed inner walls of the groove, and the guide block slides in cooperation with the two inner walls of the groove respectively; The bearing structure is provided between the guide block and at least one of the inner walls of the slide groove.

4. The balance shaft frame according to claim 3, characterized in that, The guide groove extends along a first direction, and the inner walls of the two grooves are distributed opposite each other along a second direction, with the first direction being perpendicular to the second direction.

5. The balance shaft frame according to claim 3, characterized in that, At least one of the inner walls of the two grooves is provided with the bearing structure; And / or, the outer peripheral wall of the guide block is provided with the bearing structure.

6. The balance shaft frame according to claim 5, characterized in that, The bearing structure is a needle roller bearing; Each of the grooves has a plurality of needle roller bearings on its inner wall, and the plurality of needle roller bearings are distributed sequentially along the length of the inner wall of the groove. And / or, the outer peripheral wall of the guide block is provided with a plurality of needle roller bearings, and the plurality of needle roller bearings are distributed sequentially along the circumference of the guide block.

7. The balance shaft frame according to claim 1, characterized in that, There are multiple first guide portions and multiple second guide portions, and the multiple first guide portions and multiple second guide portions are in one-to-one guiding cooperation, and each first guide portion and the corresponding second guide portion are provided with the bearing structure.

8. The balance shaft frame according to any one of claims 1-7, characterized in that, The guide support is provided with at least one weight-reducing hole; And / or, it also includes a transmission component, wherein the balance shaft gear engages with the balance ring via the transmission component; And / or, it also includes a balance shaft bracket, wherein the balance shaft gear is rotatably mounted on the balance shaft bracket.

9. An engine, characterized in that, The balance shaft frame includes any one of claims 1-8.

10. A vehicle, characterized in that, The engine as described in claim 9 is provided.

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