An integrated transmission mechanism for a heavy-duty truck drive axle

Abstract

This utility model discloses an integrated transmission mechanism for a heavy-duty truck drive axle, including a drive axle drive shaft, a universal joint, and a telescopic joint. A bushing is installed at one end of the drive axle drive shaft, and a shaft is installed at one end of the telescopic joint. A semi-annular retaining plate A and a semi-annular retaining plate B are engaged with the outer wall of the bushing. Insert rods matching the retaining holes and slots are installed on the inner walls of the semi-annular retaining plates A and B. A support sleeve is detachably connected to one end of the drive axle drive shaft. A reinforcing cylinder is installed between the support sleeve and the semi-annular retaining plates A and B. The support sleeve and drive axle drive shaft are bolted together by connecting plates A and B. Removing the bolts allows the support sleeve to be separated from the reinforcing cylinder. The semi-annular retaining plates A and B are a split-type engaging structure, allowing vertical displacement along the outer wall of the bushing, causing the insert rods to disengage from the slots and holes, and allowing the shaft to slide out from the inner wall of the bushing, thus achieving rapid disassembly of the telescopic joint and universal joint.

Description

Technical Field

[0001] This utility model relates to the field of heavy-duty truck drive axle technology, specifically an integrated transmission mechanism for a heavy-duty truck drive axle. Background Technology

[0002] The transmission mechanism of the drive axle in heavy-duty trucks is a key component for power transmission. In traditional drive axle transmission mechanisms, the connection of components such as drive shafts, universal joints, and telescopic joints is often achieved through welding or integrated construction, or through connection methods with complicated disassembly and assembly steps. When the transmission mechanism is worn and the universal joints or telescopic joints need to be maintained or replaced, it is often necessary to use cutting, welding, and other operations to disassemble and reassemble the components. This not only involves cumbersome procedures and is time-consuming, but also requires specialized equipment and personnel, resulting in high labor and equipment costs. This greatly affects the maintenance efficiency of heavy-duty trucks and makes it difficult to meet the high-frequency maintenance needs of heavy-duty trucks.

[0003] Therefore, this utility model provides an integrated transmission mechanism for a heavy-duty truck drive axle. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides an integrated transmission mechanism for heavy-duty truck drive axles, aiming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated transmission mechanism for a heavy-duty truck drive axle, comprising a drive axle drive shaft, a universal joint, and a telescopic joint. A bushing is mounted at one end of the drive axle drive shaft, and a shaft rod is mounted at one end of the telescopic joint. The shaft rod engages with the bushing. The shaft rod has several equidistantly distributed slots, and the bushing has corresponding slot holes. A semi-annular locking plate A and a semi-annular locking plate B are engaged with the outer wall of the bushing. Insert rods matching the slot holes and grooves are installed on the inner walls of the semi-annular locking plates A and B. A support sleeve is detachably connected to one end of the drive axle drive shaft, and a reinforcing sleeve is installed between the support sleeve and the semi-annular locking plates A and B.

[0006] Preferably, the shaft is slidably connected to the inner wall of the bushing, and the insert is in contact with the inner wall of the slot and the hole.

[0007] Preferably, the semi-annular clamping plate A is in contact with the outer wall of the bushing, the inner wall of the reinforcing cylinder is in contact with the outer wall of the semi-annular clamping plate A, and the outer wall of the reinforcing cylinder is in contact with the inner wall of the support sleeve.

[0008] Preferably, a docking ring is installed at one end of the drive shaft of the drive axle, and a docking groove corresponding to the docking ring is opened on the inner wall of the reinforcing cylinder.

[0009] Preferably, a plurality of connecting plates B are installed at one end of the support sleeve, and a connecting plate A corresponding to the connecting plate B is installed on the drive shaft of the drive axle, and the connecting plate A and the connecting plate B are connected by bolts.

[0010] Compared with the prior art, the present invention has the following advantages: This utility model's support sleeve and drive axle drive shaft are bolted together via connecting plate A and connecting plate B. Removing the bolts allows the support sleeve and reinforcing cylinder to be separated. The semi-annular clamping plate A and semi-annular clamping plate B are a split-type locking structure that can be vertically displaced along the outer wall of the bushing, allowing the insert rod to disengage from the slot and hole, and thus allowing the shaft to slide out from the inner wall of the bushing. This enables the rapid disassembly of the telescopic joint and universal joint. Compared with traditional welding or integrated transmission mechanisms, no cutting or welding operations are required, significantly shortening maintenance and disassembly time and reducing labor and equipment costs. It is especially suitable for the high-frequency maintenance needs of heavy trucks. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the support sleeve in this utility model; Figure 4 This is a three-dimensional structural diagram of the bushing of this utility model.

[0012] In the diagram: 1. Drive axle drive shaft; 11. Universal joint; 12. Expansion joint; 2. Bushing; 21. Shaft; 22. Slot; 23. Hole; 24. Semi-annular clamping plate A; 25. Semi-annular clamping plate B; 26. Insert rod; 3. Support sleeve; 31. Reinforcing cylinder; 32. Connecting groove; 33. Connecting ring; 34. Connecting plate A; 35. Connecting plate B. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] Please see Figure 1-4 As shown, an integrated transmission mechanism for a heavy-duty truck drive axle includes a drive axle drive shaft 1, a universal joint 11, and a telescopic joint 12. A bushing 2 is installed at one end of the drive axle drive shaft 1, and a shaft rod 21 is installed at one end of the telescopic joint 12. The shaft rod 21 engages with the bushing 2. Several equally spaced slots 22 are provided on the shaft rod 21, and slot holes 23 corresponding to the slots 22 are provided on the bushing 2.

[0015] Among them, the outer wall of the bushing 2 is engaged with a semi-annular plate A24 and a semi-annular plate B25, and the inner walls of the semi-annular plate A24 and the semi-annular plate B25 are equipped with insert rods 26 that match the card hole 23 and the card groove 22.

[0016] It should be noted that, in this embodiment, the inner walls of the semi-annular plate A24 and the semi-annular plate B25 are tightly fitted to the outer wall of the bushing 2, and the insertion rod 26 is vertically connected to the outer wall of the bushing 2.

[0017] One end of the drive shaft 1 of the drive axle is detachably connected to a support sleeve 3, and a reinforcing cylinder 31 is installed between the support sleeve 3 and the semi-annular clamping plate A24 and the semi-annular clamping plate B25.

[0018] It should be noted that the support sleeve 3 described in this embodiment is vertically supported on one side of the drive shaft 1 of the drive axle and is at the same level as the bushing 2.

[0019] Specifically, a bushing 2 is welded and fixedly installed at one end of the drive shaft 1 of the drive axle, and a shaft 21 is similarly welded and fixedly installed at one end of the telescopic joint 12. The shaft 21 and the bushing 2 are initially connected by a snap-fit ​​mechanism, providing a basis for subsequent torque transmission. Equally spaced slots 22 with horizontal cross-sections are formed on the circumferential sidewall of the shaft 21. Snap holes 23, corresponding in number and position to the slots 22, are formed on the sidewall of the bushing 2. The diameter of the snap holes 23 matches the width of the slots 22, ensuring an aligned fit. A snap-fit ​​connection is also formed on the outer wall of the bushing 2. Semi-annular clamping plates A24 and B25, when spliced ​​together, can completely enclose the outer wall of the bushing 2. On the inner wall of both semi-annular clamping plates A24 and B25, there are integrally formed insertion rods 26 that match the clamping holes 23 and grooves 22. The diameter of the insertion rods 26 is the same as the diameter of the clamping holes 23. After the semi-annular clamping plates A24 and B25 are aligned with the outer wall of the bushing 2, the insertion rods 26 are simultaneously inserted into the clamping holes 23 and grooves 22. A support sleeve 3 is detachably connected to one end of the drive shaft 1 of the drive axle. The axis of the support sleeve 3 is collinear with the axis of the drive axle drive shaft 1. A reinforcing cylinder 31, made of metal, is installed between the support sleeve 3 and the semi-annular clamping plate A24 to enhance the connection stability between the bushing 2 and the support sleeve 3. This allows the drive axle drive shaft 1 to be securely connected to the telescopic joint 12 via the bushing 2 and the shaft rod 21, enabling the universal joint 11 to provide stable drive to the connected wheel hub. When wear occurs and the universal joint 11 and telescopic joint 12 need to be removed, maintained, or replaced, the support sleeve 3 can be used to separate the support sleeve from the drive axle drive shaft 1. After separation, the reinforcing cylinder 31 can slide and separate from the outer walls of the semi-annular clamping plates A24 and B25. The semi-annular clamping plates A24 and B25 can move vertically relative to the bushing 2, allowing the insert rod 26 to separate from the slots 22 and holes 23 on the bushing 2 and shaft 21. After separation, the shaft 21 can easily slide out of the inner wall of the bushing 2, allowing for quick separation of the expansion joint 12 and universal joint 11. This facilitates convenient disassembly and separation of the expansion joint 12 and universal joint 11, and makes it easier to maintain or replace them.

[0020] In one embodiment of this utility model, such as Figures 1-4 As shown, the shaft 21 is slidably connected to the inner wall of the bushing 2, and the insert 26 is in contact with the inner wall of the slot 22 and the hole 23.

[0021] It should be noted that, in this embodiment, the outer wall of the shaft 21 is tightly fitted to the inner wall of the bushing 2. After the shaft 21 slides to the inner wall of the bushing 2, the slot 22 and the hole 23 remain vertically aligned.

[0022] Specifically, the shaft 21 needs to maintain stable coaxiality with the bushing 2 to transmit torque. The transition fit sliding connection structure can prevent the shaft 21 from shifting within the bushing 2, reducing transmission noise and local wear caused by eccentricity. The tight fit between the insert rod 26 and the slot 22 and the hole 23 can eliminate the gap between the three, preventing the impact load under heavy truck starting and braking conditions from being transmitted through the gap, thereby protecting the connection structure between the shaft 21 and the bushing 2. At the same time, the tight fit can evenly distribute the torque to the insert rod 26, the bushing 2, and the shaft 21, avoiding fatigue fracture caused by excessive force on a single part and extending the service life of the components.

[0023] In one embodiment of this utility model, such as Figures 1-4 As shown, the semi-annular plate A24 is in contact with the outer wall of the bushing 2, the inner wall of the reinforcing cylinder 31 is in contact with the outer wall of the semi-annular plate A24, and the outer wall of the reinforcing cylinder 31 is in contact with the inner wall of the support sleeve 3.

[0024] It should be noted that the reinforcing cylinder 31 described in this embodiment slides between the support sleeve 3 and the semi-annular clamping plate A24, and the support sleeve 3 and the semi-annular clamping plate A24 are detachably connected by a pin.

[0025] Specifically, the tight fit between the semi-annular clamping plate A24 and the bushing 2 ensures that the wrapping force of the semi-annular clamping plate A24 on the bushing 2 is evenly distributed, avoiding local stress concentration that could cause deformation of the bushing 2. The interference fit between the reinforcing cylinder 31 and the semi-annular clamping plate A24 and the support sleeve 3 significantly improves the radial stiffness of the transmission mechanism. When the heavy truck is traveling on bumpy roads or carrying heavy loads, it prevents the connection between the bushing 2 and the shaft 21 from becoming loose, while also reducing the deformation of the semi-annular clamping plate A24. This ensures that the insertion rod 26 is always stably inserted into the slot 22 and the hole 23, guaranteeing the reliability of the transmission.

[0026] In one embodiment of this utility model, such as Figures 1-4 As shown, a docking ring 33 is installed at one end of the drive shaft 1 of the drive axle, and a docking groove 32 corresponding to the docking ring 33 is opened on the inner wall of the reinforcing cylinder 31.

[0027] It should be noted that the outer wall of the docking ring 33 described in this embodiment is in close contact with the inner wall of the docking groove 32.

[0028] Specifically, the corresponding structure of the docking ring 33 and the docking groove 32 mainly serves as a positioning guide. When assembling the reinforcing cylinder 31, simply align the docking groove 32 with the docking ring 33 and insert it to quickly achieve coaxial positioning of the reinforcing cylinder 31 and the drive shaft 1 of the drive axle, avoiding errors caused by manual alignment and improving assembly efficiency.

[0029] In one embodiment of this utility model, such as Figures 1-4As shown, a number of connecting plates B35 are installed on one end of the support sleeve 3, and a connecting plate A34 corresponding to the connecting plate B35 is installed on the drive shaft 1 of the drive axle. The connecting plate A34 and the connecting plate B35 are connected by bolts.

[0030] It should be noted that the connecting plate A34 and connecting plate B35 described in this embodiment are provided with corresponding screw holes. The support sleeve 3 is detachably connected to one side of the drive shaft 1 of the drive axle by bolting the screw holes.

[0031] Specifically, the bolted connection structure of connecting plate A34 and connecting plate B35 enables the detachable connection between support sleeve 3 and drive shaft 1 of drive axle. Compared with welding fixation, support sleeve 3 and reinforcing cylinder 31 can be removed simply by disassembling the high-strength bolts, without the need to cut the welding structure, which greatly reduces maintenance difficulty and time cost. At the same time, the combination of high-strength bolts and anti-loosening adhesive can resist the vibration load during long-term driving of heavy trucks and prevent the support sleeve 3 from shifting due to bolt loosening.

[0032] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0033] Working principle: Weld the bushing 2 and shaft 21 to one end of the drive axle drive shaft 1 and the telescopic joint 12, respectively. Install the docking ring 33 and connecting plate B35, ensuring that the screw holes of connecting plate A34 and connecting plate B35 correspond. Then, align the core transmission structure, push the telescopic joint 12 to make the shaft 21 slide into the bushing 2 and align the slot 22 with the hole 23. Next, install the locking and support components, locking the semi-annular locking plate A24 and semi-annular locking plate B25 onto the outer wall of the bushing 2, so that the insert rod 26 is inserted into the slot 22 and the hole 23. Align the reinforcing cylinder 31 with the docking ring 33 through the docking groove 32 and fit it against the semi-annular locking plate A24. Finally, align the support sleeve 3 with the drive axle drive shaft 1. At the end, bolts are tightened through connecting plate A34 and connecting plate B35 to complete the assembly. During operation, power is transmitted through telescopic joint 12 to shaft 21, and then through insert rod 26 to bushing 2 and drive axle drive shaft 1. Finally, universal joint 11 drives the wheel hub. During driving, reinforcing cylinder 31 resists radial force, and insert rod 26 disperses impact load during braking or starting. Before maintenance and disassembly, the machine must be stopped and tools prepared. First, unscrew the bolts to remove support sleeve 3, slide out reinforcing cylinder 31, then remove semi-annular clamping plate A24 and semi-annular clamping plate B25, and pull out shaft 21 to separate telescopic joint 12 universal joint 11 from drive axle drive shaft 1 bushing 2. After maintenance or replacement of parts, reassemble in reverse according to the assembly process.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated transmission mechanism of a heavy truck drive axle, comprising a drive axle drive shaft (1), a universal joint (11) and an expansion joint (12), characterized in that, A bushing (2) is installed at one end of the drive shaft (1) of the drive axle, and a shaft (21) is installed at one end of the telescopic joint (12). The shaft (21) engages with the bushing (2). The shaft (21) has several equally spaced slots (22), and the bushing (2) has corresponding slots (23). The outer wall of the bushing (2) is fitted with a semi-annular plate A (24) and a semi-annular plate B (25). The inner walls of the semi-annular plate A (24) and the semi-annular plate B (25) are fitted with insert rods (26) that match the card hole (23) and the card groove (22). One end of the drive shaft (1) of the drive axle is detachably connected to a support sleeve (3), and a reinforcing sleeve (31) is installed between the support sleeve (3) and the semi-annular plate A (24) and the semi-annular plate B (25).

2. The integrated drive mechanism of a drive axle of a heavy duty truck according to claim 1, characterized in that, The shaft (21) is slidably connected to the inner wall of the bushing (2), and the insert (26) is in contact with the inner wall of the slot (22) and the hole (23).

3. The integrated drive mechanism of a drive axle of a heavy duty truck according to claim 1, characterized in that, The semi-annular plate A (24) is in contact with the outer wall of the bushing (2), the inner wall of the reinforcing cylinder (31) is in contact with the outer wall of the semi-annular plate A (24), and the outer wall of the reinforcing cylinder (31) is in contact with the inner wall of the support sleeve (3).

4. The integrated drive mechanism of a drive axle of a heavy duty truck according to claim 1, characterized in that, A docking ring (33) is installed at one end of the drive shaft (1) of the drive axle, and a docking groove (32) corresponding to the docking ring (33) is opened on the inner wall of the reinforcing cylinder (31).

5. The integrated drive mechanism of a drive axle of a heavy duty truck according to claim 1, characterized in that, A plurality of connecting plates B (35) are installed at one end of the support sleeve (3), and a connecting plate A (34) corresponding to the connecting plate B (35) is installed on the drive shaft (1) of the drive axle. The connecting plate A (34) and the connecting plate B (35) are connected by bolts.

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