Balance shaft assembly device

Abstract

The utility model provides a balance shaft assembly device, which belongs to the field of automobile manufacture and comprises a balance shaft and support mechanisms arranged at two ends of the balance shaft, upper end bosses are arranged at the top ends of the support mechanisms, upper wing surface frame bolt holes are arranged on the upper end bosses, side surface frame bolt holes are respectively arranged at two ends of the support mechanisms, and the side surface frame bolt holes are arranged on the support mechanisms. A lower thrust rod mounting hole is formed in the bottom of the support mechanism, lower end bosses are arranged at the bottom end of the support mechanism, a cross beam connecting plate mounting hole is formed in the bottom side of each lower end boss, a cross beam connecting plate is arranged between the two lower end bosses, and the two ends of the cross beam connecting plate are connected with the lower end bosses through the cross beam connecting plate mounting holes. Through the design of the upper end boss, the lower end boss, the cross beam connecting plate and the like, the overall structural strength, the torsional strength and the impact resistance are remarkably improved, the overall reliability is high, and the connecting structure is suitable for popularization.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a balance shaft assembly device. Background Technology

[0002] Off-highway mining dump trucks are mainly used in harsh environments such as large open-pit mines, where road conditions are extremely difficult. They have enormous load capacities, thus placing extremely stringent requirements on the suspension, especially on core suspension components such as the balance shaft assembly. The balance shaft bracket is a crucial structural component of the balance shaft assembly, playing a vital role in securing the balance shaft assembly, connecting the lower thrust rod, and bearing the impact of large loads transmitted to the frame and leaf springs.

[0003] In the prior art, Chinese patent CN201220623694.0 discloses a balance shaft assembly in a heavy-duty vehicle rear balance suspension system, including an integral balance shaft and two balance shaft brackets. Each balance shaft bracket is connected to one end of the integral balance shaft through a transition fit via its central hole. It also includes a pull-down connecting plate with connecting through holes at both ends. The bottom of the balance shaft bracket is provided with a connecting flange surface. The pull-down connecting plate is fixed to the connecting flange surface of the balance shaft bracket through its connecting through holes, so that the bottoms of the two balance shaft brackets are connected together by the pull-down connecting plate.

[0004] Although the above-mentioned balance shaft assembly can reduce the overall bending deformation of the balance shaft and reduce its fracture failure, it still has the following shortcomings in actual use: the effective contact area between the balance shaft bracket and the vehicle frame is insufficient, which reduces the connection stability and impact resistance; at the same time, the pull-down connecting plate is only connected to the balance shaft bracket through the connecting flange face, which has poor connection strength and is prone to loosening due to vibration or impact, which greatly reduces the overall structural strength of the balance shaft assembly. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing balance shaft assemblies, such as poor connection stability and poor overall structure, which affect vehicle reliability, and to provide a balance shaft assembly device.

[0006] This utility model is achieved through the following technical solution: a balance shaft assembly includes a balance shaft and support mechanisms installed at both ends of the balance shaft. An upper boss extending towards the balance shaft is provided at the center of the top of the support mechanism, and a plurality of upper wing frame bolt holes are provided on the upper boss. On the support mechanisms on both sides of the upper boss, i.e., at both ends of the support mechanisms, a plurality of side frame bolt holes are provided, and the support mechanisms are connected to the frame through the upper wing frame bolt holes and the side frame bolt holes. A plurality of lower thrust rod mounting holes are provided at the bottom of the support mechanism, and the support mechanism is connected to the lower thrust rod through the lower thrust rod mounting holes. A lower boss located below the lower thrust rod mounting holes is provided at the bottom end of the support mechanism, and a plurality of crossbeam connecting plate mounting holes are provided on the bottom side of the lower boss. A crossbeam connecting plate is provided between two lower bosses, and both ends of the crossbeam connecting plate are connected to the lower boss through the crossbeam connecting plate mounting holes.

[0007] The bracket mechanism described in this utility model adopts an integral casting structure, which can effectively control production costs and development cycle. The upper wing frame bolt holes on the upper boss and the side frame bolt holes on both ends of the bracket mechanism are connected to the frame, which greatly increases the contact area with the frame, thereby improving the structural strength between the assembly and the frame. At the same time, the design of the lower boss and the crossbeam connecting plate further enhances the overall torsional strength of the assembly, avoiding wear and cracking of the shaft and bracket caused by load impact.

[0008] A further improvement of this invention is that the lower boss comprises two symmetrically arranged boss units, and the mounting holes for the crossbeam connecting plate are arranged on the bottom side of the boss units. This design ensures the balance of the support under load and avoids stress concentration problems caused by uneven load distribution.

[0009] A further improvement of this invention is that a connecting boss is provided between the two boss units, with both ends of the connecting boss integrally connected to the center of each of the two boss units. This design further enhances the connection strength between the two boss units, ensuring that the boss units will not undergo relative displacement or deformation when subjected to large loads.

[0010] A further improvement of this invention is that two lower thrust rod mounting holes are provided, and the two lower thrust rod mounting holes are arranged symmetrically; the boss unit is respectively located at the bottom center of the two lower thrust rod mounting holes, and the central axis of the crossbeam connecting plate mounting hole is perpendicular to the central axis of the lower thrust rod mounting hole. This arrangement ensures a more stable connection between the crossbeam connecting plate and the lower thrust rod, thereby improving the torsional strength of the overall structure.

[0011] A further improvement of this invention is that a number of spaced reinforcing ribs are provided between the upper boss and the support mechanism. These reinforcing ribs are integrally connected to the upper boss and the support mechanism, and have a smooth transition. This reinforcing rib design effectively avoids stress concentration and prevents the support from cracking due to load impact.

[0012] A further improvement of this utility model is that the support mechanism on both sides of the upper boss, that is, at both ends of the support mechanism, is provided with several mounting cavities, and the side frame bolt holes are arranged inside the mounting cavities. This structure of mounting cavities allows the support as a whole to form a box-shaped structure, which enhances the structural strength of the support mechanism and avoids bolt loosening or breakage caused by external impact or vibration.

[0013] A further improvement of this invention is that the top side of the upper boss is higher than the top side of the support mechanism, so that a stepped structure can be formed between the upper boss and the support mechanism. This stepped structure not only increases the contact area between the support and the frame, but also further enhances the connection stability between the support and the frame. At the same time, the design of the stepped structure also facilitates installation and disassembly, simplifies the assembly process, and improves assembly efficiency.

[0014] A further improvement of this invention is that both ends of the balance shaft pass through the support mechanism, and each end of the balance shaft is equipped with a sealed shaft housing via bearings. A retaining ring is provided between the sealed shaft housing and the support mechanism. The sealed shaft housing is connected to the balance shaft via end caps and end cap bolts, and the end cap bolts are tightened to the balance shaft via loosening washers. This design not only provides a dustproof seal but also effectively prevents loose connections, ensuring a secure lock at both ends of the balance shaft, enhancing the overall reliability of the assembly, and preventing problems such as end cap oil leakage, balance shaft breakage, and severe wear.

[0015] A further improvement of this invention is that a balance shaft mounting hole is provided at the center of the support mechanism, through which the support mechanism is mounted to the end of the balance shaft. This design makes assembly easier for workers and improves assembly efficiency.

[0016] As can be seen from the above technical solutions, the beneficial effects of this utility model are:

[0017] 1. The bracket mechanism described in this utility model adopts a heat-fit connection method. The bracket mechanism forms an interference fit with the balance shaft through the balance shaft mounting hole, thereby ensuring the stability between the bracket and the shaft, and thus improving the reliability and firmness of the overall structure of the bracket body.

[0018] 2. This utility model connects to the frame through the upper wing frame bolt holes provided on the upper boss and the side frame bolt holes provided at both ends of the bracket body, which greatly increases the contact area with the frame, thereby improving the overall structural strength of the bracket and effectively avoiding shearing breakage of the intermediate support connecting bolts.

[0019] 3. This utility model further enhances the overall torsional strength of the balance shaft assembly by designing the lower boss and the crossbeam connecting plate, thus avoiding wear and cracking of the shaft and bracket caused by load impact.

[0020] 4. Through the design of the sealed shaft housing, this utility model can not only seal and prevent dust, but also effectively prevent loose connections, so that the two ends of the balance shaft are firmly locked, which enhances the overall reliability of the assembly and prevents problems such as oil leakage from the end cover, breakage of the balance shaft and severe wear. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the connection structure between the lower end boss and the crossbeam connecting plate in a specific embodiment of this utility model.

[0024] Figure 3 This is a schematic diagram of the support mechanism according to a specific embodiment of the present utility model.

[0025] Figure 4 This is a cross-sectional view of the support mechanism according to a specific embodiment of the present utility model.

[0026] In the diagram: 1. Balance shaft; 2. Support mechanism; 201. Assembly hole; 202. Side frame bolt hole; 203. Lower thrust rod mounting hole; 204. Mounting cavity; 3. Upper boss; 301. Upper wing frame bolt hole; 302. Reinforcing rib; 4. Boss unit; 401. Crossbeam connecting plate mounting hole; 402. Connecting boss; 5. Crossbeam connecting plate; 6. Sealed shaft housing. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] Please refer to the attached document. Figure 1 , 2 3 and 4, in conjunction with specific embodiments, are described as follows: A balance shaft assembly includes a balance shaft 1 and a support mechanism 2 installed at both ends of the balance shaft 1. In conjunction with existing balance shaft supports, the support mechanism 2 adopts an integral casting structure and is T-shaped. An assembly hole 201 is provided at the center of the support mechanism 2, through which the support mechanism 2 is installed at the end of the balance shaft 1. Using a heat-fit connection, the support mechanism 2 forms an interference fit with the balance shaft 1 through the assembly hole 201, thereby ensuring the stability between the support and the shaft, and thus improving the overall reliability and robustness of the support mechanism 2.

[0029] The support mechanism 2 has an upper boss 3 extending toward the balance shaft 1 at the top center. The upper boss 3 has several upper wing frame bolt holes 301. The support mechanism 2 on both sides of the upper boss 3, that is, at both ends of the support mechanism 2, has several side frame bolt holes 202. The support mechanism 2 is connected to the frame through the upper wing frame bolt holes 301 and the side frame bolt holes 202.

[0030] The upper wing-shaped frame bolt holes 301 on the upper boss 3 are used to connect the support mechanism 2 to the frame with bolts. This design increases the contact area between the support and the frame, improving the stability and impact resistance of the connection. Meanwhile, the side frame bolt holes 202 at both ends of the support mechanism 2 are used to further connect the support mechanism 2 to the frame with bolts, enhancing the connection strength between the support and the frame and preventing loosening due to vibration or impact.

[0031] The bottom of the support mechanism 2 is provided with several thrust rod mounting holes 203, through which the support mechanism 2 is connected to the thrust rod. The function of the thrust rod is to transmit the thrust of the vehicle and ensure that the vehicle remains stable during driving. Through the thrust rod mounting holes 203, the support mechanism 2 can be firmly connected to the thrust rod, enhancing the overall torsional strength of this assembly.

[0032] The bottom end of the support mechanism 2 is provided with a lower boss located below the lower thrust rod mounting hole 203. Several crossbeam connecting plate mounting holes 401 are provided on the bottom side of the lower boss. A crossbeam connecting plate 5 is provided between two lower bosses, and both ends of the crossbeam connecting plate 5 are connected to the lower bosses through the crossbeam connecting plate mounting holes 401. The crossbeam connecting plate mounting holes 401 on the lower boss are used to connect the crossbeam connecting plate 5. The crossbeam connecting plate 5 connects the support mechanisms 2 at both ends of the balance shaft 1. This design between the lower boss and the crossbeam connecting plate 5 further enhances the overall torsional strength of this assembly, preventing wear and cracking of the shaft and support caused by load impact.

[0033] The bracket mechanism 2 described in this utility model adopts an integral casting structure, which can effectively control production costs and development cycle. It is connected to the frame through the upper wing frame bolt holes 301 provided on the upper boss 3 and the side frame bolt holes 202 provided at both ends of the bracket mechanism 2, which greatly increases the contact area with the frame, thereby improving the structural strength between the assembly and the frame. At the same time, the design of the lower boss and the crossbeam connecting plate 5 further enhances the overall torsional strength of the assembly and avoids wear and cracking of the shaft and bracket caused by load impact.

[0034] In one embodiment, the lower boss includes two symmetrically arranged boss units 4, and the beam connecting plate mounting holes 401 are arranged on the bottom side of the boss units 4. This design ensures the balance of the bracket under force and avoids stress concentration problems caused by uneven force distribution.

[0035] In one embodiment, a connecting boss 402 is provided between the two boss units 4, and the two ends of the connecting boss 402 are integrally connected to the center of the two boss units 4 respectively. This design further enhances the connection strength between the two boss units 4, ensuring that the boss units 4 will not undergo relative displacement or deformation when subjected to large loads.

[0036] In one embodiment, two lower thrust rod mounting holes 203 are provided, and the two lower thrust rod mounting holes 203 are arranged symmetrically; the boss unit 4 is respectively located at the bottom center of the two lower thrust rod mounting holes 203, and the central axis of the crossbeam connecting plate mounting hole 401 is perpendicular to the central axis of the lower thrust rod mounting hole 203. This arrangement ensures a more stable connection between the crossbeam connecting plate 5 and the lower thrust rod, thereby improving the torsional strength of the overall structure.

[0037] In one embodiment, a plurality of spaced reinforcing ribs 302 are provided between the upper boss 3 and the support mechanism 2. The reinforcing ribs 302 are integrally connected to the upper boss 3 and the support mechanism 2, and the reinforcing ribs 302 have a smooth transition. This design of the reinforcing ribs 302 can effectively avoid stress concentration and prevent the support from cracking due to load impact.

[0038] In one embodiment, several mounting cavities 204 are provided on the support mechanisms 2 on both sides of the upper boss 3, that is, at both ends of the support mechanism 2. The side frame bolt holes 202 are arranged inside the mounting cavities 204. This structure of the mounting cavities 204 allows the support as a whole to form a box-shaped structure, which enhances the structural strength of the support mechanism 2 and avoids bolt loosening or breakage caused by external impact or vibration.

[0039] In one embodiment, the top side of the upper boss 3 is higher than the top side of the support mechanism 2, so that a stepped structure can be formed between the upper boss 3 and the support mechanism 2. This stepped structure not only increases the contact area between the support and the frame, but also further enhances the connection stability between the support and the frame. At the same time, the design of the stepped structure also facilitates installation and disassembly, simplifies the assembly process, and improves assembly efficiency.

[0040] In one embodiment, both ends of the balance shaft 1 pass through the support mechanism 2, and both ends of the balance shaft 1 are respectively provided with a sealing shaft housing 6 through bearings. A retaining ring is provided between the sealing shaft housing 6 and the support mechanism 2. The sealing shaft housing 6 is sealed to the balance shaft 1 by end caps and end cap bolts, and the end cap bolts are tightened to the balance shaft 1 by loosening washers.

[0041] The bearing can be a maintenance-free rubber bearing. The sealed shaft housing 6 is pressed into both ends of the balance shaft 1 through the rubber bearing, so that it can be rotatably connected. The outer side of both ends of the balance shaft 1 is designed with threaded holes. The outer side of the sealed shaft housing 6 is sealed with end caps. After the end cap bolts are equipped with anti-loosening washers and the end caps and shaft are tightened, the rubber bearing and the sealed shaft housing 6 can be interference fit. This not only seals and prevents dust, but also effectively prevents the connection from loosening. This makes the two ends of the balance shaft 1 firmly locked, which enhances the overall reliability of this assembly and prevents problems such as oil leakage from the end caps, breakage of the balance shaft 1, and severe wear.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A counter shaft assembly arrangement comprising a counter shaft (1) and a bracket mechanism (2) mounted to both ends of the counter shaft (1), characterized in that, The top center of the support mechanism (2) is provided with an upper end boss (3) extending towards the balance shaft (1), and a plurality of upper wing surface frame bolt holes (301) are arranged on the upper end boss (3); a plurality of side surface frame bolt holes (202) are arranged on the support mechanism (2) on both sides of the upper end boss (3), that is, on both ends of the support mechanism (2), and the support mechanism (2) is connected with the frame through the upper wing surface frame bolt holes (301) and the side surface frame bolt holes (202); a plurality of lower push rod mounting holes (203) are arranged on the bottom of the support mechanism (2), and the support mechanism (2) is connected with the lower push rod through the lower push rod mounting holes (203); the bottom end of the support mechanism (2) is provided with a lower end boss below the lower push rod mounting hole (203), and a plurality of beam connecting plate mounting holes (401) are arranged on the bottom side of the lower end boss; a beam connecting plate (5) is arranged between the two lower end bosses, and the two ends of the beam connecting plate (5) are connected with the lower end bosses through the beam connecting plate mounting holes (401).

2. A counterbalance shaft assembly as set forth in claim 1, wherein, The lower end boss includes two symmetrically arranged boss units (4), and the beam connecting plate mounting holes (401) are arranged on the bottom side of the boss unit (4).

3. A counterbalance shaft assembly as set forth in claim 2, wherein, A connecting boss (402) is arranged between the two boss units (4), and the two ends of the connecting boss (402) are integrally connected with the centers of the two boss units (4), respectively.

4. A counterbalance shaft assembly as set forth in claim 3, wherein, The lower push rod mounting hole (203) is provided with two symmetrically arranged lower push rod mounting holes (203); the boss unit (4) is arranged at the center of the bottom side of the two lower push rod mounting holes (203), and the central axis of the beam connecting plate mounting hole (401) is perpendicular to the central axis of the lower push rod mounting hole (203).

5. A counterbalance shaft assembly as claimed in claim 1 or 4, wherein, A plurality of reinforcing ribs (302) are arranged between the upper end boss (3) and the support mechanism (2), the reinforcing ribs (302) are integrally connected with the upper end boss (3) and the support mechanism (2), and the reinforcing ribs (302) are smoothly transitioned.

6. A counterbalance shaft assembly as set forth in claim 5, wherein, The support mechanism (2) on both sides of the upper end boss (3), that is, on both ends of the support mechanism (2), is provided with a plurality of mounting cavities (204), and the side surface frame bolt holes (202) are arranged inside the mounting cavities (204).

7. A counterbalance shaft assembly as set forth in claim 6, wherein, The top side of the upper end boss (3) is higher than the top side of the support mechanism (2), so that a stepped structure can be formed between the upper end boss (3) and the support mechanism (2).

8. A counterbalance shaft assembly as set forth in claim 7, wherein, Both ends of the balance shaft (1) penetrate the support mechanism (2), and both ends of the balance shaft (1) are provided with a sealed shaft housing (6) through a bearing, and the sealed shaft housing (6) and the support mechanism (2) are provided with a check ring.

9. A counterbalance shaft assembly as set forth in claim 8, wherein, The sealed shaft housing (6) is sealed and connected with the balance shaft (1) through an end cover and an end cover bolt, and the end cover bolt is tightened with the balance shaft (1) through a loose washer.

10. A counterbalance shaft assembly as set forth in claim 9, wherein, The center of the support mechanism (2) is provided with an assembly hole (201), and the support mechanism (2) is mounted on the end of the balance shaft (1) through the assembly hole (201).

Images