A drive shaft universal joint with a spline anti-disengagement structure

Abstract

This utility model relates to a universal joint for drive shafts with a spline anti-detachment structure, belonging to the technical field of universal joints for drive shafts. The universal joint for drive shafts with a spline anti-detachment structure includes: a first drive shaft, with a universal joint body installed at one end of the first drive shaft, and a second drive shaft installed at the other end of the universal joint body. One end of the second drive shaft is provided with an anti-detachment mechanism. The second drive shaft is embedded in the inner wall of the first drive shaft via a spline shaft. The nylon layer on the outer wall of the spline shaft reduces wear and impact on the spline shaft. One end of the spline shaft contacts a rubber pad. A placement groove and a keyway are aligned, allowing a key block to be embedded within the placement groove and keyway. One end of the placement groove facilitates the disassembly of the key block. A sliding sleeve moving along the groove can fix the key block. A threaded sleeve can fix the first drive shaft and the second drive shaft together, improving the anti-detachment effect and stability of the universal joint.

Description

Technical Field

[0001] This utility model relates to the field of universal joint technology for drive shafts, and in particular to a universal joint for drive shafts with a spline anti-disengagement structure. Background Technology

[0002] A universal joint, also known as a universal connector, is a mechanical component that enables variable-angle power transmission. It is used in locations where the direction of the drive shaft needs to be changed, and it is the "joint" component of the universal joint transmission system in a car's drive system. The combination of a universal joint and a drive shaft is called a universal joint transmission. In front-engine, rear-wheel-drive vehicles, the universal joint transmission is installed between the transmission output shaft and the drive axle final drive input shaft. During operation, splines are used to prevent the universal joint from dislodging and to maintain the universal power transmission of the drive shaft.

[0003] As shown in the reference case "A universal joint with end anti-detachment function" announcement number "CN222760167U", through the adaptive connection between the transmission component and the connecting component, the end of the universal joint can play a good role in preventing end detachment, and when the drive shaft at the end of the universal joint is worn, the drive shaft at the end of the universal joint can be replaced.

[0004] According to the above reference materials, when one end of the drive shaft in the above device is pulled out, the product moves to the left along the axial direction. The circular retaining ring will move to the lower right angle along the bottom of the annular limiting groove, thereby increasing the sag of the retaining ring and ensuring that the retaining ring has a greater anti-disengagement resistance. The structural design of the retaining ring inside the annular limiting groove increases the sag of the circular retaining ring by 0.26mm, which can increase the anti-disengagement resistance of the retaining ring. However, when the device is subjected to axial impact or vibration, the drive shaft universal joint is prone to loosening and falling off, affecting the use of the drive shaft universal joint, making it inconvenient to effectively prevent the drive shaft universal joint from falling off, and reducing the use effect of the drive shaft universal joint. Utility Model Content

[0005] Therefore, it is necessary to provide a drive shaft universal joint with a spline anti-disengagement structure to address the problem of inconvenience in effectively preventing and limiting the disengagement of the drive shaft universal joint.

[0006] The device includes a first drive shaft, one end of which is fitted with a universal joint body, and the other end of which is fitted with a second drive shaft. One end of the second drive shaft is provided with an anti-detachment mechanism. The anti-detachment mechanism includes a spline shaft fixedly connected to one end of the second drive shaft, one end of which is embedded in the inner wall of the first drive shaft. The other end of the outer wall of the spline shaft has a keyway, and a key block is engaged with the inner wall of the keyway. A sliding sleeve is slidably connected to the outer wall of the first drive shaft, and a fixing component is provided at one end of the sliding sleeve.

[0007] In one embodiment, the anti-detachment mechanism further includes a threaded sleeve rotatably connected to one end of the sliding sleeve, one end of which is threadedly connected to the second drive shaft.

[0008] In one embodiment, both sides of the outer wall of the first drive shaft are slidably connected with grooves, and the inner walls of the two grooves are respectively embedded in the inner walls of the inner walls of the sliding sleeve.

[0009] In one embodiment, a rubber pad is provided at one end of the spline shaft, the rubber pad is disposed on the inner wall of the first drive shaft, and a nylon layer is fixedly connected to the outer wall of the spline shaft.

[0010] In one embodiment, a placement groove is provided at one end of the outer wall of the first drive shaft, and the placement groove is located at the top of the keyway.

[0011] In one embodiment, the fixing component includes a fixing plate fixedly connected to one end of the second drive shaft, and one end of the sliding sleeve is provided with a number of evenly arranged fixing bolts.

[0012] In one embodiment, one end of the fixing bolt passes through the sliding sleeve and the fixing plate in sequence and is threadedly connected to a nut.

[0013] In one embodiment, both ends of the fixing bolt are fitted with washers, and the two washers are respectively disposed at one end of the sliding sleeve and the fixing plate.

[0014] Beneficial effects 1. In the above-mentioned universal joint with spline anti-disengagement structure, the second drive shaft is embedded in the inner wall of the first drive shaft through a spline shaft. The nylon layer on the outer wall of the spline shaft can reduce the wear and impact on the spline shaft. One end of the spline shaft contacts the rubber pad, which can reduce the wear on the spline shaft. The placement groove and the keyway are aligned so that the key block can be embedded in the placement groove and the keyway to limit the spline shaft. One end of the placement groove facilitates the disassembly of the key block. The sliding sleeve moves along the sliding groove to fix the key block. The threaded sleeve is connected to the second drive shaft to fix the first drive shaft and the second drive shaft together, which improves the anti-disengagement effect of the universal joint and improves the stability of the universal joint. 2. When the threaded sleeve at one end of the sliding sleeve is connected to the second drive shaft, the fixing bolt can pass through the sliding sleeve and the fixing plate. The fixing bolt and the nut can then be used to fix the first drive shaft and the second drive shaft together and fix the spline shaft. The washer at one end of the fixing bolt and the nut can improve the fixing effect of the device and prevent the universal joint of the drive shaft from falling off. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the anti-detachment mechanism of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial structural diagram of the anti-detachment mechanism of this utility model; Figure 5 This is a schematic diagram of the fixing component structure of this utility model.

[0017] Figure label: 100. First drive shaft; 200. Universal joint body; 300. Second drive shaft; 400. Anti-detachment mechanism; 410. Splined shaft; 420. Keyway; 430. Key block; 440. Sliding sleeve; 450. Threaded sleeve; 460. Slide groove; 470. Placement groove; 480. Rubber pad; 481. Nylon layer; 490. Fixing assembly; 491. Fixing plate; 492. Fixing bolt; 493. Washer; 494. Nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The following is combined with Figure 1 - Figure 5 This invention describes a universal joint for a drive shaft with a spline anti-detachment structure.

[0020] In one embodiment, a universal joint with a spline anti-detachment structure includes a first drive shaft 100, a universal joint body 200 mounted at one end of the first drive shaft 100, a second drive shaft 300 mounted at the other end of the universal joint body 200, and an anti-detachment mechanism 400 provided at one end of the second drive shaft 300. The anti-detachment mechanism 400 includes a spline shaft 410 fixedly connected to one end of the second drive shaft 300, one end of the spline shaft 410 being embedded in the inner wall of the first drive shaft 100, a keyway 420 being provided at the other end of the outer wall of the spline shaft 410, a key block 430 being engaged with the inner wall of the keyway 420, and a sliding sleeve 440 being slidably connected to the outer wall of the first drive shaft 100, with a fixing component 490 provided at one end of the sliding sleeve 440.

[0021] It should be noted that the drive shaft universal joint of model "SWC165" consists of: universal joint fork, cross shaft, needle roller bearing, oil seal, sleeve, bearing cover, etc. One of the rotating forks drives the other fork to rotate via a cross shaft, and can also swing around the center of the cross shaft in any direction; during the rotation, the needle rollers in the needle roller bearing can rotate on their own; the shaft connected to the input power is called the input shaft, and the shaft output through the universal joint is called the output shaft; When the drive shaft universal joint is connected, the anti-detachment mechanism 400 uses the keyway 420 and key block 430 to clamp the spline shaft 410 onto the inner wall of the first drive shaft 100. The sliding sleeve 440 and threaded sleeve 450 cooperate to connect with the second drive shaft 300. The key block 430 can also be limited. The fixing component 490 uses the fixing bolt 492, washer 493 and nut 494 to fix the first drive shaft 100 and the second drive shaft 300 together. The anti-detachment mechanism 400 and the fixing component 490 can effectively prevent the drive shaft universal joint from detaching and will not affect the normal use of the drive shaft universal joint.

[0022] like Figure 2 , Figure 3 and Figure 4 As shown, the anti-detachment mechanism 400 also includes a threaded sleeve 450 rotatably connected to one end of the sliding sleeve 440. One end of the threaded sleeve 450 is threadedly connected to the second drive shaft 300. Both sides of the outer wall of the first drive shaft 100 are slidably connected to the sliding grooves 460. The inner walls of the two sliding grooves 460 are respectively embedded in the inner walls of the two sliding grooves 460 on both sides of the inner wall of the sliding sleeve 440. One end of the spline shaft 410 is provided with a rubber pad 480, which is located on the inner wall of the first drive shaft 100. The outer wall of the spline shaft 410 is fixedly connected with a nylon layer 481. One end of the outer wall of the first drive shaft 100 is provided with a placement groove 470, which is located at the top of the keyway 420.

[0023] In this embodiment, the spline shaft 410 drives the nylon layer 481 to embed into the inner wall of the first drive shaft 100, which can reduce the wear of the spline shaft 410. It also contacts the rubber pad 480, which can reduce the impact on the spline shaft 410. The key block 430 is embedded into the inner wall of the placement groove 470 and the keyway 420 in sequence, which can fix the spline shaft 410 to the inner wall of the first drive shaft 100. The sliding sleeve 440 drives the threaded sleeve 450 to move to one end along the sliding groove 460, which can limit the key block 430. The threaded sleeve 450 is rotated and threadedly connected to the second drive shaft 300, which can fix the first drive shaft 100 and the second drive shaft 300 together, effectively preventing the universal joint of the drive shaft from falling off and improving the stability of the universal joint of the drive shaft.

[0024] like Figure 5 As shown, the fixing assembly 490 includes a fixing plate 491 fixedly connected to one end of the second transmission shaft 300. A number of evenly arranged fixing bolts 492 are provided at one end of the sliding sleeve 440. One end of the fixing bolt 492 passes through the sliding sleeve 440 and the fixing plate 491 in sequence and is threadedly connected to a nut 494. Both ends of the fixing bolt 492 are fitted with washers 493. The two washers 493 are respectively provided at one end of the sliding sleeve 440 and the fixing plate 491.

[0025] In this embodiment, the sliding sleeve 440 slides to one end of the first drive shaft 100, and multiple fixing bolts 492 pass through the sliding sleeve 440 and the fixing plate 491 in sequence, and are threadedly connected to the nut 494. As the fixing bolts 492 and the nut 494 are connected, the washer 493 can be driven to contact the sliding sleeve 440 and the fixing plate 491, thereby improving the fixing effect between the first drive shaft 100 and the second drive shaft 300 and preventing the universal joint of the drive shaft from falling off.

[0026] Working principle: The second drive shaft 300 drives the spline shaft 410 to embed into the inner wall of the first drive shaft 100. The keyway 420 on the outer wall of the spline shaft 410 is aligned with the placement groove 470 on the outer wall of the first drive shaft 100. The key block 430 is embedded in the keyway 420 and the placement groove 470 in sequence to fix the spline shaft 410. The sliding sleeve 440 drives the threaded sleeve 450 to slide to one end along the two sliding grooves 460. The threaded sleeve 450 is manually rotated and threaded to one end of the second drive shaft 300. The sliding sleeve 440 moves to the outer wall of the key block 430 to limit the key block 430. The fixing bolt 492 passes through the sliding sleeve 440 and the fixing plate 491 in sequence and is threaded to the nut 494. The fixing bolt 492 and the nut 494 cooperate to drive the washer 493 to fix the first drive shaft 100 and the second drive shaft 300.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A universal joint for a drive shaft with a spline anti-detachment structure, characterized in that, include: A first drive shaft (100) is provided with a universal joint body (200) at one end and a second drive shaft (300) at the other end of the universal joint body (200). An anti-detachment mechanism (400) is provided at one end of the second drive shaft (300). The anti-detachment mechanism (400) includes a spline shaft (410) fixedly connected to one end of a second drive shaft (300), one end of the spline shaft (410) being embedded in the inner wall of a first drive shaft (100), and a keyway (420) being provided at the other end of the outer wall of the spline shaft (410). A key block (430) is engaged with the inner wall of the keyway (420), and a sliding sleeve (440) is slidably connected to the outer wall of the first drive shaft (100). A fixing component (490) is provided at one end of the sliding sleeve (440).

2. The universal joint for drive shafts with a spline anti-detachment structure according to claim 1, characterized in that, The anti-detachment mechanism (400) further includes a threaded sleeve (450) rotatably connected to one end of the sliding sleeve (440), and one end of the threaded sleeve (450) is threadedly connected to the second drive shaft (300).

3. The universal joint for drive shafts with a spline anti-detachment structure according to claim 1, characterized in that, Both sides of the outer wall of the first drive shaft (100) are slidably connected with grooves (460), and the inner walls of the two grooves (460) are respectively embedded in the inner walls of the inner wall of the sliding sleeve (440).

4. The universal joint for drive shafts with a spline anti-detachment structure according to claim 1, characterized in that, A rubber pad (480) is provided at one end of the spline shaft (410), the rubber pad (480) is provided on the inner wall of the first transmission shaft (100), and a nylon layer (481) is fixedly connected to the outer wall of the spline shaft (410).

5. The universal joint for drive shafts with a spline anti-detachment structure according to claim 1, characterized in that, The first drive shaft (100) has a placement groove (470) at one end of its outer wall, and the placement groove (470) is located at the top of the keyway (420).

6. The universal joint for drive shafts with a spline anti-detachment structure according to claim 1, characterized in that, The fixing component (490) includes a fixing plate (491) fixedly connected to one end of the second drive shaft (300), and a number of evenly arranged fixing bolts (492) are provided at one end of the sliding sleeve (440).

7. The universal joint for drive shafts with a spline anti-detachment structure according to claim 6, characterized in that, One end of the fixing bolt (492) passes through the sliding sleeve (440) and the fixing plate (491) in sequence and is threadedly connected to the nut (494).

8. The universal joint for drive shafts with a spline anti-detachment structure according to claim 6, characterized in that, Both ends of the fixing bolt (492) are fitted with washers (493), and the two washers (493) are respectively disposed at one end of the sliding sleeve (440) and the fixing plate (491).

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