Mechanism for assembling balance shaft

Abstract

The utility model discloses a mechanism for assembling a balance shaft, which comprises a bottom plate, an assembling mechanism is arranged on the bottom plate, the assembling mechanism comprises an air cylinder, a transmission block, a supporting plate, a bearing frame and a clamping mechanism, and the clamping mechanism comprises a mounting sleeve, an inclined groove, an inclined block, an arc-shaped plate, a push block, a sliding sleeve, a sliding rod, a connecting block and a synchronizing mechanism. The mounting sleeve is mounted on the bearing frame, the multiple sets of inclined grooves are distributed in the mounting sleeve, the inclined blocks slide in the multiple sets of inclined grooves, the arc-shaped plate is mounted on the inner sides of the multiple sets of inclined blocks, the push blocks are arranged below the multiple sets of inclined blocks, the sliding sleeve is mounted on the outer sides of the multiple sets of push blocks, and the sliding rod slides in the sliding sleeve. The connecting blocks are installed at the outer ends of the sliding rods, the inclined blocks slide inwards along the inclined grooves under the action of the pushing blocks, the arc-shaped plates are driven to move inwards synchronously, the arc-shaped plates push and press the multiple sets of clamping plates inwards, the clamping plates make close contact with the outer wall of the balance shaft, and therefore a workpiece is fixed.

Description

TECHNICAL FIELD

[0001] The utility model relates to engine parts assembly technical field more specifically, it relates to a kind of mechanism for balancing shaft assembly. BACKGROUND

[0002] In modern manufacturing industry, especially involving engine parts assembly field, accurate assembly of balancing shaft is a crucial task, balancing shaft is the core component of engine operation balance, and its assembly precision directly affects the running performance and stability of engine, in actual assembly process, in order to ensure the positioning accuracy of balancing shaft, it needs to be stably clamped and supported, however, in the prior art, clamping device is often designed for specific diameter balancing shaft, cannot be compatible with balancing shaft of different sizes, leading to poor clamping effect when assembling different specifications balancing shaft, even unable to complete the work, this limitation seriously affects the versatility and flexibility level of production line, is not conducive to the improvement of production efficiency and the rapid switching of multi-specification products;

[0003] For the clamping needs of different diameter workpieces in the process of balancing shaft assembly, the prior art has significant deficiencies, most of the current clamping devices adopt fixed structure, and cannot be self-adaptively adjusted according to the change of balancing shaft diameter in actual use, leading to uneven clamping force distribution or insecure clamping, this clamping mode not only easily causes workpiece deviation, affects assembly accuracy, but also may cause surface damage of workpiece, reduces the quality stability of product, in addition, as multiple diameters of workpieces cannot be compatible, enterprises need to equip special clamping equipment for balancing shafts of different specifications, further increases production cost, and reduces equipment utilization. UTILITY MODEL CONTENTS

[0004] In view of the problems in the prior art, the utility model provides a kind of mechanism for balancing shaft assembly to solve the technical problem that cannot be self-adaptively adjusted according to the change of balancing shaft diameter in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: A kind of mechanism for balanced shaft assembly, including bottom plate, assembly mechanism is provided on the bottom plate, the assembly mechanism includes cylinder, transmission block, support plate, support frame and clamping mechanism, the cylinder is installed on bottom plate top surface, the transmission block is installed in cylinder telescopic end, the support plate is installed on transmission block, the support frame is installed on support plate, the clamping mechanism includes mounting sleeve, chute, inclined block, arc plate, push block, sliding sleeve, slide rod, connecting block and synchronous mechanism, the mounting sleeve is installed on support frame, the chute is provided with multiple groups and is distributed in mounting sleeve, the inclined block slides in multiple group chute, the arc plate is installed in multiple group inclined block inboard, the push block is arranged below multiple group inclined block, the sliding sleeve is installed outside multiple group push block, the slide rod slides in sliding sleeve, the connecting block is installed in slide rod outer end, the bottom plate one end is equipped with mounting plate, the mounting plate is equipped with mounting groove, the mounting groove is used to place the shaft seat for assembling with balanced shaft, the mounting groove is set according to actual shaft seat shape.

[0006] The utility model further sets up, synchronous mechanism includes rotary sleeve, gear ring, screw rod, gear, cooperation cylinder and lever, rotary sleeve is rotatably installed on the outer wall of mounting sleeve, gear ring is installed on rotary sleeve bottom surface, screw rod is provided with multiple groups and is rotatably installed on the outside of mounting sleeve, gear is installed on multiple group screw rod top end, cooperation cylinder is installed on multiple group connecting block and is respectively connected with multiple group screw rod thread, lever is provided with multiple groups and is installed on the outer wall of rotary sleeve, the synchronous action of multiple clamping components in clamping device is realized by the mechanism, the coordination and stability of clamping process are ensured, and the efficiency and reliability of assembly operation are improved.

[0007] The utility model further sets up, transmission block bottom surface is equipped with sliding block, the bottom plate is equipped with slide, and the sliding block is connected with the slide, the stability and accuracy of the path of transmission block in the movement process are ensured by the structure, clamping or assembly failure caused by path deviation is avoided, and the operation precision is improved.

[0008] The utility model further sets up, mounting sleeve outer wall is equipped with guide strip, the guide strip is provided with multiple groups and is respectively connected with multiple group connecting block sliding, the movement of connecting block is more stable and reliable by the constraint of guide strip, and the stability and precision of assembly mechanism are improved by reducing operating resistance and movement error.

[0009] The utility model further sets up, and the inboard of multiple group arc plate is equipped with push spring, the push spring is provided with multiple groups, the top end of multiple group push spring is equipped with clamping plate, and the inboard of multiple group clamping plate is equipped with soft pad, and push spring provides elastic force to ensure that clamping plate and workpiece are stably attached, and soft pad protects workpiece surface from damage, and the adaptability and stability of clamping mechanism are improved.

[0010] The utility model further sets up, a plurality of groups the inclined block top surface with the inside wall between installation sleeve all are connected with the compression spring, and the compression spring makes the inclined block have reset function, ensures that the clamping mechanism can reset quickly when loosening state, prepares for next operation, improves work efficiency.

[0011] The utility model further sets up, a plurality of groups the sliding sleeve and slide rod between all are connected with reset spring, and reset spring ensures that sliding sleeve can return to initial position automatically after loosening operation, simplifies the operation process, improves the use convenience of assembly mechanism.

[0012] The utility model further sets up, a plurality of groups the push block both sides all are equipped with push rod, a plurality of groups the push rod top all are equipped with the resistance block, a plurality of groups the resistance block with the inside wall of installation sleeve abuts, and push rod and resistance block structure provide additional support and restraint effect, ensure the stability and reliability of push block movement, avoid the clamping failure or misoperation due to deviation.

[0013] Beneficial effects:

[0014] Compared with the prior art, the utility model provides a kind of mechanism for balancing shaft assembly, with following beneficial effects:

[0015] 1, the device in assembly mechanism, by setting up cylinder, transmission block, support plate and support bracket etc., realize the stable support and accurate positioning of balancing shaft in assembly process, the driving of cylinder drives transmission block to carry out linear motion, and transmission block is slidably connected with the bottom plate through sliding block and sliding groove, ensure the stability and accuracy of movement path, simultaneously, the movement of transmission block drives support plate and support bracket to move synchronously, so that balancing shaft and shaft seat are assembled smoothly, effectively improve assembly efficiency and accuracy, and the stability of transmission structure is further improved by the guiding cooperation of sliding groove and sliding block, ensure that there is no deviation in assembly process.

[0016] 2, in clamping mechanism, by the cooperation of installation sleeve, inclined slot, inclined block, arc plate, push block, sliding sleeve, slide rod, clamping plate and soft pad etc., realize the stable clamping of the outer wall of balancing shaft, and the inclined block is slid inward along the inclined slot under the action of push block, drives arc plate to move inward synchronously, and the arc plate pushes a plurality of clamping plates inward, so that clamping plate and the outer wall of balancing shaft are in close contact, so as to fix workpiece, and the soft pad arranged in the inner side of clamping plate can avoid damaging the surface of balancing shaft during clamping process, in addition, the clamping mechanism provides elastic force through push spring, to ensure the reliability and flexibility of clamping, when it is needed to release clamping, make the inclined block reset through reverse drive, and clamping plate is automatically loosened, realize the convenient operation of clamping and releasing.

[0017] 3、In the aspect of synchronous mechanism, through setting rotating sleeve, gear ring, screw rod, gear, matching cylinder and lever, etc, synchronous action of the clamping mechanism is ensured, rotating the lever to drive rotating sleeve to rotate, gear ring at the bottom of rotating sleeve meshes with gear at the top of screw rod, rotation of gear ring synchronously drives multiple screw rods to rotate, screw rods make matching cylinder translate along axial direction through thread connection, movement of matching cylinder further drives slide rod and slide sleeve to move, thereby realizing synchronous pushing of push block, multiple inclined blocks are synchronously pushed inwards and clamp balance shaft, in reverse operation, gear ring reversely rotates, screw rod and matching cylinder reversely move, drive the clamping mechanism to release fixing of workpiece, complete disassembly process, through transmission design of synchronous mechanism, coordinated movement of multiple clamping components is realized, synchronism and precision of clamping operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structural schematic view of the mechanism for assembling balance shaft in the utility model;

[0019] Figure 2 It is a structural schematic view of the assembling mechanism in the utility model;

[0020] Figure 3 It is a sectional view structural schematic view of the clamping mechanism in the utility model;

[0021] Figure 4 It is a sectional view structural schematic view of the slide sleeve in the utility model;

[0022] Figure 5 It is a sectional view structural schematic view of the mounting sleeve in the utility model.

[0023] In the drawing: 1, bottom plate; 2, air cylinder; 3, transmission block; 4, support plate; 5, bearing bracket; 6, mounting sleeve; 7, inclined groove; 8, inclined block; 9, arc plate; 10, push block; 11, slide sleeve; 12, slide rod; 13, connecting block; 14, mounting plate; 15, mounting groove; 16, rotating sleeve; 17, gear ring; 18, screw rod; 19, gear; 20, matching cylinder; 21, lever; 22, slide block; 23, slide groove; 24, guide bar; 25, push spring; 26, clamping plate; 27, soft pad; 28, compression spring; 29, return spring; 30, push rod; 31, abutting block. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0026] In the utility model, in the case where no opposite statement is made, the orientation such as "upper, lower" is usually for the direction shown in the drawing, or for the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is usually for the left and right shown in the drawing; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0027] Please refer to Figures 1-5 A mechanism for balancing shaft assembly, including bottom plate 1, bottom plate 1 is provided with assembly mechanism, assembly mechanism includes pneumatic cylinder 2, transmission block 3, support plate 4, support frame 5 and clamping mechanism, pneumatic cylinder 2 is installed on the top surface of bottom plate 1, transmission block 3 is installed on the telescopic end of pneumatic cylinder 2, support plate 4 is installed on transmission block 3, support frame 5 is installed on support plate 4, clamping mechanism includes mounting sleeve 6, inclined chute 7, inclined block 8, arc plate 9, push block 10, sliding sleeve 11, slide rod 12, connecting block 13 and synchronous mechanism, mounting sleeve 6 is installed on support frame 5, inclined chute 7 is provided with multiple groups distributed in mounting sleeve 6, inclined block 8 slides in multiple groups of inclined chute 7, arc plate 9 is installed on the inner side of multiple groups of inclined block 8, push block 10 is arranged below multiple groups of inclined block 8, sliding sleeve 11 is installed on the outer side of multiple groups of push block 10, slide rod 12 slides in sliding sleeve, connecting block 13 is installed on the outer end of slide rod 12, one end of bottom plate 1 is provided with mounting plate 14, mounting groove 15 is formed in mounting plate 14, and mounting groove 15 is used to place the shaft seat assembled with the balancing shaft, and mounting groove 15 is set according to the actual shape of the shaft seat.

[0028] Synchronous mechanism includes rotating sleeve 16, gear ring 17, screw rod 18, gear 19, matching cylinder 20 and lever 21, rotating sleeve 16 is rotatably installed on the outer wall of mounting sleeve 6, gear ring 17 is installed on the bottom surface of rotating sleeve 16, screw rod 18 is provided with multiple groups of rotating installation on the outer side of mounting sleeve 6, gear 19 is installed on the top end of multiple groups of screw rod 18, matching cylinder 20 is installed on multiple groups of connecting block 13 and is respectively threadedly connected with multiple groups of screw rod 18, lever 21 is provided with multiple groups of installation on the outer wall of rotating sleeve 16, when lever 21 drives rotating sleeve 16 to rotate, gear ring 17 is engaged with gear 19 on the top end of screw rod 18, so that screw rod 18 rotates synchronously. Since matching cylinder 20 is threadedly connected with screw rod 18, the rotation of screw rod 18 will make matching cylinder 20 move along the axial direction, so as to realize the synchronous action of clamping mechanism.

[0029] Transmission block 3 is provided with sliding block 22 on the bottom surface, and sliding groove 23 is formed in bottom plate 1, the sliding block 22 is slidably connected with the sliding groove 23, and the transmission block 3 can stably and linearly move along the sliding groove 23.

[0030] The outer wall of the mounting sleeve 6 is provided with a guide strip 24, which is provided with multiple groups and is in sliding connection with multiple groups of connecting blocks 13. The sliding connection enables the connecting blocks 13 to move linearly stably under the constraint of the guide strip 24.

[0031] The inner side of each group of arc-shaped plates 9 is provided with a push spring 25, which is provided with multiple groups. The top end of each group of push springs 25 is provided with a clamping plate 26, and the inner side of each group of clamping plates 26 is provided with a soft pad 27. When the arc-shaped plates are clamped, the push spring 25 provides elastic force to enable the clamping plate 26 to stably adhere to the workpiece, and the soft pad 27 plays a buffering protection role.

[0032] In this embodiment, the balance shaft is placed in the mounting sleeve 6. The rotating sleeve 16 is rotated by rotating the rotating rod 21, and the bottom gear ring 17 of the rotating sleeve 16 is rotated synchronously. The gear ring 17 at the bottom of the rotating sleeve 16 is in meshing connection with the gear 19 installed at the top end of the multiple screw rods 18. When the gear ring 17 rotates, the gear 19 drives the screw rod 18 to rotate synchronously. The screw rod 18 is connected to the matching cylinder 20 installed on the connecting block 13 through threads. The rotation of the screw rod 18 drives the matching cylinder 20 to move in the axial direction. The matching cylinder 20 further drives the sliding sleeve 11 to move through the sliding rod 12. The sliding sleeve 11 drives the push block 10 to move, so that multiple groups of push blocks 10 realize synchronous pushing action on the inclined block 8. The inclined block 8 slides inward along the inclined groove 7, thereby driving the arc-shaped plate 9 to move inward synchronously. The arc-shaped plate 9 pushes the clamping plate 26 at the top end of the multiple groups of push springs 25 to clamp and fix the contact of the outer wall of the balance shaft. The soft pad 27 is tightly attached to the outer wall of the balance shaft to avoid damage to the surface of the workpiece during clamping. Then, the shaft seat assembled with the balance shaft outside is placed in the mounting groove 15. Subsequently, the air cylinder 2 is started to drive the telescopic end to push the transmission block 3. The transmission block 3 moves linearly through the sliding connection between the sliding block 22 and the sliding groove 23, drives the support plate 4 and the supporting frame 5 to move synchronously, drives the balance shaft and the shaft seat to be assembled, realizes the support and positioning of the workpiece during assembly, and ensures that the movement path of the transmission block 3 is stable and accurate.

[0033] Please refer to Figure 4 , as an embodiment of the clamping mechanism: multiple groups of inclined blocks 8 are connected between the top surface and the inner wall of the mounting sleeve 6. The compression spring 28 is provided between the top surface of the inclined block 8 and the inner wall of the mounting sleeve 6. The compression spring 28 provides elastic force to enable the inclined block 8 to return to the initial position when the workpiece is not clamped.

[0034] Multiple groups of sliding sleeves 11 are connected between the sliding rod 12. When the sliding sleeve 11 is moved by external force, the return spring 29 generates elastic force to enable the sliding sleeve 11 to return to the original position.

[0035] The push rod 30 is arranged on both sides of the plurality of push blocks 10, and the top end of the push rod 30 is provided with a stop block 31, and the plurality of stop blocks 31 abut against the inner wall of the mounting sleeve 6. When the push block 10 moves, the push rod 30 and the stop block 31 jointly form a support and constraint structure.

[0036] More specifically, when the slide sleeve 11 is moved by the slide rod 12, the stop block 31 abuts against the inner wall of the mounting sleeve 6 and slides along the inner wall, so that the push block 10 slides along the inclined surface of the inner wall of the mounting sleeve 6, and at the same time, the tension spring connected between the inner wall of the slide sleeve 11 and the slide rod 12 is stretched. When the push block 10 pushes the inclined block 8 to slide along the inclined groove 7, the compression spring 28 is extruded. When it is necessary to disassemble the balance shaft, the rotating sleeve 16 is reversely rotated by reversely rotating the push rod 21, and the connecting block 13 and the slide rod 12 are moved downward by the threaded cooperation between the screw rod 18 and the matching cylinder 20, and at the same time, the slide sleeve 11 and the push block 10 are moved. The tension spring is retracted to pull the slide sleeve 11 outward, and the push block 10 slides along the inner wall of the mounting sleeve 6 through the stop block 31, so as to release the abutment of the inclined block 8. The inclined block 8 is pushed to slide downward along the inclined groove 7 by the elastic reset of the compression spring 28, so that the plurality of clamping plates 26 release the clamping of the outer wall of the balance shaft.

[0037] In summary, when the whole device is in use or operation: the balance shaft is placed in the mounting sleeve 6, the rotating sleeve 16 is rotated by rotating the push rod 21, the rotating sleeve 16 rotates to drive the tooth ring 17 at the bottom thereof to rotate synchronously, the tooth ring 17 at the bottom of the rotating sleeve 16 is engaged with the gear 19 arranged at the top end of the plurality of screw rods 18, when the tooth ring 17 rotates, the gear 19 drives the screw rod 18 to rotate synchronously, the screw rod 18 is connected with the matching cylinder 20 arranged on the connecting block 13 through threads, the rotation of the screw rod 18 drives the matching cylinder 20 to translate along the axial direction, the matching cylinder 20 further drives the slide sleeve 11 to move through the slide rod 12, the slide sleeve 11 drives the push block 10 to move, so that the plurality of push blocks 10 realize synchronous pushing action on the inclined block 8, the inclined block 8 slides inward along the inclined groove 7, so as to drive the arc-shaped plate 9 to move inward synchronously, the arc-shaped plate 9 pushes the clamping plates 26 at the top end of the plurality of push springs 25 to clamp and fix the outer wall of the balance shaft, the soft pad 27 is tightly attached to the outer wall of the balance shaft to avoid damage to the surface of the workpiece during clamping, then the shaft seat assembled with the balance shaft outside is placed in the mounting groove 15, and then the cylinder 2 is started to drive the telescopic end to push the transmission block 3, the transmission block 3 moves linearly through the sliding block 22 and the sliding groove 23 connected through sliding, drives the support plate 4 and the supporting frame 5 to move synchronously, drives the balance shaft and the shaft seat to be assembled, realizes the support and positioning of the workpiece during assembly, and the sliding block 22 and the sliding groove 23 are guided and matched to ensure that the movement path of the transmission block 3 is stable and accurate.

[0038] When the sliding rod 12 drives the sliding sleeve 11 to move, the abutting block 31 abuts against the inner wall of the mounting sleeve 6 and slides along the inner wall, so that the push block 10 slides along the inner wall of the mounting sleeve 6 in a slope guiding mode, and the tension spring connected between the inner wall of the sliding sleeve 11 and the sliding rod 12 is stretched, the push block 10 pushes the inclined block 8 to slide along the inclined groove 7 and extrudes the compression spring 28, when the balance shaft needs to be disassembled, the reverse knob 21 is reversely rotated to drive the rotating sleeve 16 to rotate reversely, the connecting block 13 and the sliding rod 12 are driven to move downwards through the screw rod 18 and the cooperating cylinder 20, and the sliding sleeve 11 and the push block 10 are driven to move, the tension spring is contracted to drive the sliding sleeve 11 to move outwards, the push block 10 slides along the inner wall of the mounting sleeve 6 through the abutting block 31, so that the abutting against the inclined block 8 is released, the inclined block 8 is driven to slide downwards along the inclined groove 7 through the elastic reset of the compression spring 28, so that the plurality of clamping plates 26 are released from clamping the outer wall of the balance shaft.

[0039] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection or other known connection mode, which will not be described one by one, and the welding is preferred when the fixed connection is mentioned above, although the embodiments of the utility model have been shown and described, those skilled in the art can understand that the embodiments can be changed, modified, replaced and modified in various ways without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A mechanism for assembling a balance shaft, comprising a base plate (1), characterized in that: An assembly mechanism is provided on the base plate (1). The assembly mechanism includes a cylinder (2), a transmission block (3), a support plate (4), a support bracket (5), and a clamping mechanism. The cylinder (2) is installed on the top surface of the base plate (1). The transmission block (3) is installed on the telescopic end of the cylinder (2). The support plate (4) is installed on the transmission block (3). The support bracket (5) is installed on the support plate (4). The clamping mechanism includes an mounting sleeve (6), a slant groove (7), a slant block (8), an arc plate (9), a push block (10), a sliding sleeve (11), a sliding rod (12), a connecting block (13), and a synchronization mechanism. The mounting sleeve (6) is installed on the support bracket (5). The slant groove (7) is provided with... Multiple sets are distributed within the mounting sleeve (6). The inclined block (8) slides within the multiple sets of inclined grooves (7). The arc plate (9) is installed inside the multiple sets of inclined blocks (8). The push block (10) is located below the multiple sets of inclined blocks (8). The sliding sleeve (11) is installed outside the multiple sets of push blocks (10). The sliding rod (12) slides within the sliding sleeve. The connecting block (13) is installed at the outer end of the sliding rod (12). One end of the base plate (1) is equipped with a mounting plate (14). The mounting plate (14) has a mounting groove (15) for placing the bearing seat that is assembled with the balance shaft. The mounting groove (15) is set according to the actual shape of the bearing seat.

2. The mechanism for assembling a balance shaft according to claim 1, characterized in that: The synchronization mechanism includes a rotating sleeve (16), a gear ring (17), a screw (18), a gear (19), a mating sleeve (20), and a lever (21). The rotating sleeve (16) is rotatably mounted on the outer wall of the mounting sleeve (6). The gear ring (17) is mounted on the bottom surface of the rotating sleeve (16). Multiple sets of screws (18) are rotatably mounted on the outside of the mounting sleeve (6). The gear (19) is mounted on the top of multiple sets of screws (18). The mating sleeve (20) is mounted on multiple sets of connecting blocks (13) and is threadedly connected to multiple sets of screws (18). Multiple sets of levers (21) are mounted on the outer wall of the rotating sleeve (16).

3. The mechanism for assembling a balance shaft according to claim 2, characterized in that: The bottom surface of the transmission block (3) is provided with a slider (22), and the bottom plate (1) is provided with a groove (23). The slider (22) is slidably connected to the groove (23).

4. The mechanism for assembling a balance shaft according to claim 3, characterized in that: The outer wall of the mounting sleeve (6) is provided with guide strips (24), and the guide strips (24) are provided in multiple sets and are slidably connected to multiple sets of the connecting blocks (13).

5. A mechanism for assembling a balance shaft according to claim 4, characterized in that: multiple sets Push springs (25) are installed on the inner side of the arc plate (9). There are multiple sets of push springs (25). Each set of push springs (25) has a clamping plate (26) installed at the top. Each set of clamping plates (26) has a soft pad (27) installed on the inner side.

6. The mechanism for assembling a balance shaft according to claim 5, characterized in that: A compression spring (28) is provided between the top surface of the multiple sets of inclined blocks (8) and the inner wall of the mounting sleeve (6).

7. A mechanism for assembling a balance shaft according to claim 6, characterized in that: multiple sets A return spring (29) is provided between the sliding sleeve (11) and the sliding rod (12).

8. A mechanism for assembling a balance shaft according to claim 7, characterized in that: multiple sets Push rods (30) are installed on both sides of the push block (10), and abutment blocks (31) are installed at the top of the push rods (30). The abutment blocks (31) abut against the inner wall of the mounting sleeve (6).

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