阅读说明：本技术 一种132缸径单缸机下置水平平衡系统 (Lower horizontal balance system of 132-cylinder-diameter single-cylinder engine ) 是由 师帅楠 谢亮 任淑荣 赵清旭 田树枫 陈正虎 扈钰涛 李全帅 李建惠 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种132缸径单缸机下置水平平衡系统,包括用于安装平衡轴的曲轴下箱,曲轴下箱的箱体左右两侧上铰接有两根一级平衡轴和两根二级平衡轴,所述一级平衡轴和所述二级平衡轴为半圆式偏心平衡轴,且布置于曲轴的正下方,两根一级平衡轴和两根二级平衡轴各自以曲轴轴线为中心线对称布置,所述一级平衡轴和所述二级平衡轴的左端均连接有齿轮,且每相邻的两个齿轮之间相互啮合。本发明效率高、结构紧凑、传动比稳定、可靠性高,可以更加有效的消除振动,保证单缸机的稳定运转。(The invention discloses a 132-cylinder-diameter single-cylinder-engine underneath horizontal balancing system which comprises a crankshaft lower box used for installing balancing shafts, wherein two first-stage balancing shafts and two second-stage balancing shafts are hinged to the left side and the right side of a box body of the crankshaft lower box, the first-stage balancing shafts and the second-stage balancing shafts are semicircular eccentric balancing shafts and are arranged right below a crankshaft, the two first-stage balancing shafts and the two second-stage balancing shafts are symmetrically arranged by taking the axis of the crankshaft as a central line, gears are connected to the left ends of the first-stage balancing shafts and the second-stage balancing shafts, and every two adjacent gears are meshed with each other. The invention has high efficiency, compact structure, stable transmission ratio and high reliability, can more effectively eliminate vibration and ensure the stable operation of the single cylinder engine.)

1. The utility model provides a 132 cylinder diameter single cylinder engine is horizontal balance system down, includes crankshaft lower box (14) that is used for installing balanced axle, articulated on the box left and right sides of crankshaft lower box (14) have two one-level balanced axles and two second grade balanced axles (3), its characterized in that: the one-level balance shaft with second grade balance shaft (3) are semicircle formula eccentric balance shaft, and arrange under the bent axle, and two one-level balance shafts and two second grade balance shaft (3) use the bent axle axis respectively as central line symmetrical arrangement, the one-level balance shaft with the left end of second grade balance shaft (3) all is connected with the gear, and intermeshing between every two adjacent gears.

2. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 1, wherein: all be provided with four mounting holes on the box left and right sides wall of bent axle nowel (14), all be provided with spacing draw-in groove in the mounting hole of bent axle nowel (14) left side wall, and in install spacing retaining ring (12) in the spacing draw-in groove, all install bearing housing (10) through the bolt in the mounting hole of bent axle nowel (14) right side wall, just the inner circle left side of bearing housing (10) is provided with spacing step.

3. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 2, wherein: the one-level balance shaft with the left and right sides difference interference fit of second grade balance shaft (3) has one-level balance shaft bearing (2) and second grade balance shaft bearing (1), and left bearing with the left mounting hole interference fit of bent axle nowel (14), the bearing on right side with bearing housing (10) interference fit, and in one-level balance shaft gear (6) are installed in the left side of one-level balance shaft bearing (2), second grade balance shaft gear (5) are installed in the left side of second grade balance shaft bearing (1).

4. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 3, wherein: the one-level balance shaft includes one-level balance shaft A (4) and one-level balance shaft B (11), still install left one-level balance shaft gear (6) that are located one-level balance shaft bearing (2) on one-level balance shaft B (11), in addition, in drive gear (7) are still installed in the left side of one-level balance shaft gear (6) of one-level balance shaft B (11), and drive gear (7) are fixed through bolt and one-level balance shaft gear (6), the one-level balance shaft with both ends are provided with gland nut (8) respectively about second grade balance shaft (3), make it compress tightly left one-level balance shaft gear (6), drive gear (7) and second grade balance shaft gear (5) and the bearing on right side.

5. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 4, wherein: the mounting surfaces of the first-stage balance shaft and the second-stage balance shaft (3) on the left side, used for mounting the first-stage balance shaft gear (6) and the second-stage balance shaft gear (5), are conical surfaces.

6. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 4, wherein: and a mounting table (9) is further arranged above the left side and the middle two mounting holes of the lower crankshaft box (14), and an idle wheel (13) meshed with the transmission gear (7) is mounted on the mounting table (9).

7. The underneath horizontal balancing system of a 132-cylinder single cylinder engine of claim 1, wherein: the secondary balance shafts (3) are positioned on the front side and the rear side of the primary balance shaft and are symmetrically arranged.

Technical Field

The invention relates to the technical field of single-cylinder engines, in particular to a lower horizontal balance system of a 132-cylinder-diameter single-cylinder engine.

Background

A132-cylinder-diameter single-cylinder engine belongs to a high-power and high-rotating-speed single-cylinder diesel engine. In the operation process, because the reciprocating speed of the moving parts such as the piston, the crankshaft and the like is not uniform, the whole machine body can be greatly vibrated.

During operation of the 132-cylinder-diameter single-cylinder engine, the reciprocating speed of the piston is not uniform. When the piston moves to the upper dead point or the lower dead point, the speed is zero; the speed is maximum at the middle position of the upper and lower dead points. Because the piston does reciprocating motion in the cylinder, larger inertia force is inevitably generated at the piston, the piston pin and the connecting rod, so that the single cylinder engine generates larger vibration, and the performance is more obvious particularly when the rotating speed is higher. Although the balance weight of the connecting rod can balance a part of the inertia force, the balance effect is not ideal.

The existing balance system using chain transmission is driven by a crankshaft to rotate, the arrangement position of the balance system is determined according to the overall layout of the machine, the space occupancy rate is large, and the balance system using gear transmission is arranged on the side of the crankshaft in order to save space. Therefore, the existing chain type transmission balance system and gear transmission balance system are only suitable for small mechanical equipment and are not suitable for large single-cylinder engines with high power and high rotating speed; the transmission efficiency of a chain transmission balance system is lower than that of a gear transmission; the chain is worn after being used for a long time, and the jumping of teeth is easy to occur; chain drives are not suitable for use in high load change and rapid reverse drives. The gear transmission balance system arranged on the side of the crankshaft saves space, the balance shaft is designed to be relatively thin, the structure is relatively complex, and the gear transmission balance system is not suitable for a high-power and high-rotating-speed single cylinder engine.

Disclosure of Invention

The invention aims to solve the technical problem of providing a 132-cylinder-diameter single-cylinder engine underneath horizontal balance system which has high efficiency, compact structure, stable transmission ratio and high reliability, can effectively eliminate vibration and ensure stable operation.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a 132 cylinder diameter single cylinder engine puts horizontal balance system down, is including the bent axle nowel that is used for installing the balance shaft, and it has two one-level balance shafts and two second grade balance shafts to articulate on the box left and right sides of bent axle nowel, the one-level balance shaft with the second grade balance shaft is semicircle formula eccentric balance shaft, and arranges under the bent axle, and two one-level balance shafts and two second grade balance shafts use the bent axle axis to arrange as central line symmetry separately, the one-level balance shaft with the left end of second grade balance shaft all is connected with the gear, and intermeshing between every two adjacent gears.

The technical scheme of the invention is further improved as follows: all be provided with four mounting holes on the box left and right sides wall of bent axle nowel, all be provided with spacing draw-in groove in the mounting hole of bent axle nowel left side wall, and in install spacing retaining ring in the spacing draw-in groove, all install the bearing housing through the bolt in the mounting hole of bent axle nowel right side wall, just the inner circle left side of bearing housing is provided with spacing step.

The technical scheme of the invention is further improved as follows: the one-level balance shaft with the left and right sides of second grade balance shaft interference fit respectively has one-level balance shaft bearing and second grade balance shaft bearing, and left bearing with the left mounting hole interference fit of bent axle nowel, the bearing on right side with bearing housing interference fit, and in one-level balance shaft gear is installed in the left side of one-level balance shaft bearing, second grade balance shaft gear is installed in the left side of second grade balance shaft bearing.

The technical scheme of the invention is further improved as follows: the one-level balance shaft includes one-level balance shaft A and one-level balance shaft B, still install the left one-level balance shaft gear that is located one-level balance shaft bearing on the one-level balance shaft B, in addition, in drive gear is still installed in the left side of one-level balance shaft gear of one-level balance shaft B, and drive gear passes through the bolt and is fixed with one-level balance shaft gear, the one-level balance shaft with both ends are provided with gland nut respectively about the second grade balance shaft, make it compress tightly left one-level balance shaft gear, drive gear and second grade balance shaft gear and the bearing on right side.

The technical scheme of the invention is further improved as follows: the mounting surfaces on the left sides of the primary balance shaft and the secondary balance shaft, which are used for mounting the primary balance shaft gear and the secondary balance shaft gear, are conical surfaces.

The technical scheme of the invention is further improved as follows: and mounting platforms are further arranged above the left side and the middle two mounting holes of the lower crankshaft box, and idler wheels meshed with the transmission gears are mounted on the mounting platforms.

The technical scheme of the invention is further improved as follows: the secondary balance shafts are positioned on the front side and the rear side of the primary balance shaft and are symmetrically arranged.

Due to the adoption of the technical scheme, the invention has the technical progress that:

the balance shaft adopts the combination of a first-stage balance shaft and a second-stage balance shaft and is arranged right below the crankshaft, the two first-stage balance shafts and the two second-stage balance shafts are respectively symmetrically arranged in the lower box of the crankshaft by taking the axis of the crankshaft as a central line, meanwhile, the balance shaft is also a semicircular eccentric balance shaft, and the two adjacent balance shafts are in meshing transmission through a balance shaft gear, so that the defects of abrasion and tooth jumping of chain transmission are avoided.

Be provided with spacing draw-in groove in the left mounting hole of bent axle nowel to be provided with spacing retaining ring in spacing draw-in groove, thereby can restrict the axial displacement of balanced axle and left bearing, the bearing housing on bent axle nowel right side has a spacing step, thereby can prevent bearing axial float, thereby can strengthen the driven stability and the reliability of overall structure.

The one-level balance shaft with the left side of second grade balance shaft, be used for the installation the one-level balance shaft gear with the installation face of second grade balance shaft gear is the conical surface to can avoid the pine of gear and axle to take off, the bearing on left balance shaft gear and right side is compressed tightly through gland nut to the left and right sides of one-level balance shaft and second grade balance shaft simultaneously, easy dismounting, thereby the later maintenance work of being convenient for.

Drawings

FIG. 1 is an assembly view of the balance system of the present invention;

FIG. 2 is a schematic structural view of a balance shaft of the present invention;

FIG. 3 is a schematic view of the assembly of the balance shaft and gear assembly of the present invention;

FIG. 4 is a schematic view of the mounting structure of the balance system of the present invention;

the device comprises a first-stage balance shaft bearing 1, a second-stage balance shaft bearing 2, a first-stage balance shaft bearing 3, a second-stage balance shaft 4, a first-stage balance shaft A, a second-stage balance shaft gear 5, a first-stage balance shaft gear 6, a first-stage balance shaft gear 7, a transmission gear 8, a compression nut 9, an installation platform 10, a bearing sleeve 11, a first-stage balance shaft B, a first-stage balance shaft 12, a limiting retainer ring 13, an idler wheel 14 and a lower crankshaft box.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

as shown in figure 1, the lower horizontal balance system of the 132-cylinder-diameter single-cylinder engine comprises a lower crankshaft box 14 used for installing balance shafts, wherein two first-stage balance shafts and two second-stage balance shafts 3 are hinged to the left side and the right side of a box body of the lower crankshaft box 14 and are arranged under a crankshaft, the two first-stage balance shafts and the two second-stage balance shafts 3 are respectively symmetrically arranged by taking the axis of the crankshaft as a central line, and meanwhile, the first-stage balance shafts and the second-stage balance shafts 3 adopt semicircular eccentric balance shafts, so that opposite acting forces can be provided when the balance shafts at all stages rotate, and vibration generated in the operation process of the single-cylinder engine can be reduced.

All be provided with four mounting holes on the wall of the left and right sides of bent axle nowel 14, one-level balance shaft and second grade balance shaft 3 articulate in the mounting hole, all are provided with spacing draw-in groove in the left mounting hole of bent axle nowel 14 to install spacing retaining ring 12 in spacing draw-in groove, thereby can restrict the axial displacement of balance shaft and left bearing. The bearing sleeve 10 is mounted in the mounting hole in the right side of the lower crankshaft box 14 through bolts, and the left side of the inner ring of the bearing sleeve 10 is provided with a limiting step, so that the axial movement of the bearing can be prevented, and the transmission stability and reliability of the whole structure can be enhanced.

The left and right sides of one-level balance shaft and second grade balance shaft 3 respectively interference fit has one-level balance shaft bearing 2 and second grade balance shaft bearing 1, and left bearing and the left mounting hole interference fit of 14 left mounting holes of bent axle nowel, the bearing and the bearing housing 10 interference fit on right side, the epaxial one-level balance shaft gear 6 that all installs and lie in one-level balance shaft bearing 2 left side of one-level balance shaft bearing, second grade balance shaft gear 5 is installed in second grade balance shaft bearing 1's left side, this moment, in order to avoid the pine of gear and axle to take off, the installation face that one-level balance shaft gear 6 and second grade balance shaft gear 5 are used for installing in one-level balance shaft and second grade balance shaft 3 left is set up to the conical surface.

As shown in fig. 3 in combination with fig. 4, the primary balance shaft includes a primary balance shaft a4 and a primary balance shaft B11, the primary balance shaft B11 is provided with a primary balance shaft gear 6 on the left side of the primary balance shaft bearing 2, and a transmission gear 7 is further provided on the left side of the primary balance shaft gear 6 of the primary balance shaft B11, and the transmission gear 7 is fixed to the primary balance shaft gear 6 by a bolt.

In addition, a mounting table 9 is arranged above the left side and the middle two mounting holes of the lower crankshaft box 14, and an idle wheel 13 meshed with the transmission gear 7 is mounted on the mounting table 9, so that after the single-cylinder engine is started, the crankshaft rotates to drive the crankshaft gear, the idle wheel 13 meshed with the crankshaft gear rotates along with the crankshaft gear, the transmission gear 7 is driven at the same time to drive the balance shaft gears at all stages to rotate along with the crankshaft gear, the balance shafts are rotated, and reaction force is provided to reduce vibration of the single-cylinder engine.

As shown in fig. 3 in combination with fig. 4, in order to enhance the overall stability and ensure the installation strength, compression nuts 8 are respectively disposed at the left and right ends of the primary balance shaft and the secondary balance shaft 3, so as to compress the left primary balance shaft gear 6, the transmission gear 7, the secondary balance shaft gear 5 and the right bearing. The compression nut 8 is adopted for fastening, so that the assembly and disassembly are convenient, and the subsequent maintenance work is convenient.

The installation method comprises the following steps:

firstly, a primary balance shaft A4 and a primary balance shaft bearing 2 are combined through interference fit; then the crankshaft balance shaft bearing 2 penetrates through a mounting hole in the right side of the crankshaft lower box 14, and the first-stage balance shaft bearing 2 is in interference fit with the mounting hole in the left side of the crankshaft lower box 14; meanwhile, the limit retainer ring 12 is arranged in a limit clamp groove of a mounting hole on the left side of the lower crankshaft box 14 so as to limit the axial displacement of the balance shaft and the bearing; combining the bearing sleeve 10 with a mounting hole at the right side of the lower crankshaft box 14 and fixing the bearing sleeve and the mounting hole by using a bolt; the primary balance shaft bearing 2 is arranged in an inner hole of the bearing sleeve 10 and is in interference fit, and a limiting step is reserved in the mounting hole of the bearing sleeve 10 during machining, so that the bearing can be prevented from axially moving;

the primary balance shaft gear 6 is arranged at the shaft neck of the primary balance shaft A4, and the mounting surface is a conical surface, so that the gear and the shaft can be prevented from loosening; and simultaneously, the compression nuts 8 on two sides of the balance shaft are fastened to compress the first-stage balance shaft gear 6 on the left side of the balance shaft and the first-stage balance shaft bearing 2 on the right side of the balance shaft. This completes the installation of the primary balance shaft a 4. The same is true for the installation of the primary balance shaft B11, except that a drive gear 7 needs to be bolted to the left side of the primary balance shaft gear 6.

The installation of the secondary balance shaft 3 is that the secondary balance shaft bearing 1 and a left side installation hole of the crankshaft lower box 14 are combined together through interference fit; then, the secondary balance shaft 3 penetrates through the mounting hole in the right side of the lower crankshaft box 14, the secondary balance shaft bearing 1 is mounted, and a limiting step is reserved in the bearing mounting hole of the lower crankshaft box 14 during machining, so that the axial movement of the bearing can be prevented; the gear of the secondary balance shaft 3 is arranged at the shaft neck of the secondary balance shaft 3, and the mounting surface is a conical surface, so that the gear and the shaft can be prevented from loosening; and simultaneously, the compression nuts 8 on the two sides of the balance shaft are fastened to compress the secondary balance shaft gear 5 on the left side of the balance shaft and the secondary balance shaft bearing 1 on the right side of the balance shaft. This completes the installation of the secondary balance shaft 3.

After the single-cylinder engine is started, the crankshaft rotates to drive the crankshaft gear, the idle wheel 13 meshed with the crankshaft gear rotates along with the crankshaft gear, and meanwhile, the transmission gear 7 is driven to drive the gears of all levels of the balance shaft to rotate along with the crankshaft gear, so that the balance shaft rotates, and reaction force is provided to reduce vibration of the single-cylinder engine.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.