Three-section type middle double-sliding transmission shaft

Abstract

The three-section type middle double-sliding transmission shaft comprises a sliding shaft rod, fixed shaft sleeves are arranged at the two ends of the sliding shaft rod in a sliding mode, universal joints are arranged at the ends, away from the sliding shaft rod, of the two fixed shaft sleeves, and sliding structures are arranged at the two ends of the peripheral wall of the sliding shaft rod. The utility model relates to the technical field of automobile transmission shafts. According to the three-section type middle double-sliding transmission shaft, through the three-section type transmission shaft jointly composed of the two fixed shaft sleeves and the sliding shaft rod, during transmission, the pressure of inertia on the shaft rod can be effectively dispersed, and the service life of the transmission shaft can be effectively prolonged; compared with one-way sliding in the prior art, the sensitivity of the transmission shaft can be effectively improved, so that the transmission shaft does not generate motion interference under the condition that the relative position of the drive axle and the transmission is frequently changed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile transmission shafts, in particular to a three-section intermediate double-slip transmission shaft. Background Art

[0002] The transmission of power from the engine to the transmission, then to the front and rear axles, and finally to the wheels, all happens through the drive shaft. When the car is driving at high speeds, the drive shaft rotates at high speeds, and its stability directly affects the car's high-speed performance.

[0003] Chinese patent publication number CN210212044U discloses a high-efficiency shaft-sliding type transmission shaft assembly that can slide in both directions. It mainly solves the problem that the intermediate shaft of the current transmission shaft assembly cannot slide and the sliding amount is small. It is characterized in that: the first shaft is axially provided with a slide groove, and also includes a second shaft with one end extending into the slide groove and slidingly cooperating with the slide groove, a retaining frame is provided between the circumferential outer wall of the second shaft and the circumferential inner wall of the slide groove, and a ball is provided in the retaining frame, and the ball slides with the circumferential outer wall of the second shaft and the ball slides with the circumferential inner wall of the slide groove. The utility model provides a high-efficiency shaft-sliding type transmission shaft assembly that can slide in both directions, wherein the first shaft and the second shaft can slide relative to each other, the sliding amount is large, and the first, second and third elastic members are provided for buffering, and the operation is stable.

[0004] However, in the above technology, since the first shaft and the second shaft are connected to each other in a sleeve-type manner, there is a large difference in weight between the first shaft and the second shaft. Therefore, during the transmission process of the transmission shaft, it is easy for the first shaft and the second shaft to have a large pressure on the contact surface between the two shafts due to the difference in inertia, thereby reducing the service life of the first shaft and the second shaft. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a three-section intermediate double-slip transmission shaft so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A three-stage intermediate double-sliding transmission shaft comprises a sliding shaft rod, fixed sleeves are slidably provided at both ends of the sliding shaft rod, universal joints are provided at the ends of the two fixed sleeves away from the sliding shaft rod, sliding structures are provided at both ends of the outer peripheral wall of the sliding shaft rod, and a guide structure is provided inside the fixed sleeves;

[0008] A cooling structure is provided on one end of the outer peripheral wall of the fixed shaft sleeve close to the universal joint, and a pressure relief structure is provided between the two fixed shaft sleeves.

[0009] Furthermore, the sliding structure includes a rotation groove, which is opened on the outer wall of the sliding shaft. There are multiple rotation grooves, and the distances between adjacent rotation grooves are equal. A guide wheel is provided for rotation inside the rotation groove, and a sliding rail is provided inside the fixed sleeve at a position corresponding to the guide wheel.

[0010] Furthermore, the guide structure includes a guide rod, which is fixedly installed inside the fixed sleeve. Both ends of the sliding shaft are provided with through grooves that slide with the guide rod. A through pipe is provided inside the guide rod, which is bent and connected to the inside of the fixed sleeve.

[0011] Furthermore, a connecting tube is provided inside the sliding shaft, and both ends of the connecting tube are respectively connected to the through grooves provided on both sides of the sliding shaft.

[0012] Furthermore, the cooling structure includes a plurality of cooling fins, and a plurality of welding pipes are commonly provided inside the cooling fins for connecting the cooling fins. The cooling fins are fixedly connected to the fixed sleeve, and the distances between adjacent cooling fins are equal.

[0013] Furthermore, the pressure relief structure includes two mounting rings, which are respectively fixedly connected to one end adjacent to the two fixed sleeves. A pressure relief spring is commonly connected between the two mounting rings, and the pressure relief spring is sleeved on the outer peripheral wall of the sliding shaft.

[0014] In summary, the present invention has at least one of the following beneficial technical effects:

[0015] 1. This three-stage intermediate double-sliding drive shaft, composed of two fixed bushings and a sliding shaft, can effectively disperse the pressure of inertia on the shaft during transmission, effectively extending the service life of the drive shaft. Furthermore, the two fixed bushings allow both ends of the drive shaft assembly to slide independently, effectively improving the sensitivity of the drive shaft compared to the unidirectional sliding in the prior art, thereby preventing motion interference when the relative position of the drive axle and transmission frequently changes.

[0016] 2. This three-section intermediate double sliding transmission shaft is used to install a guide wheel through the setting of a rotating groove. Since the guide wheel protrudes from the outer wall of the sliding shaft, when the sliding shaft and the fixed sleeve slide, the sliding friction between the guide wheel and the inner wall of the fixed sleeve can effectively reduce the friction between the sliding shaft and the fixed sleeve, thereby achieving the effect of increasing the service life of the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural schematic diagram of a three-section intermediate double-slip transmission shaft of the utility model.

[0019] Figure 2 This is a schematic structural diagram of the cooling structure and pressure relief structure of a three-section intermediate double-sliding transmission shaft of the present invention.

[0020] Figure 3 This is a structural schematic diagram of a sliding shaft rod and a fixed shaft sleeve of a three-section intermediate double-sliding transmission shaft of the utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of a fixed sleeve of a three-section intermediate double-sliding transmission shaft of the utility model.

[0022] Figure 5 This is a structural schematic diagram of the sliding structure and guide structure of a three-section intermediate double-sliding transmission shaft of the utility model.

[0023] In the figure, 1. sliding shaft; 2. fixed sleeve; 3. universal joint; 4. sliding structure; 401. rotating shaft; 402. guide wheel; 403. sliding rail; 5. guide structure; 501. guide rod; 502. through groove; 503. through pipe; 504. connecting pipe; 6. cooling structure; 601. cooling fin; 602. welding pipe; 7. pressure relief structure; 701. mounting ring; 702. pressure relief spring. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] Example:

[0026] Reference Figure 1-Figure 5The utility model discloses a three-stage intermediate double sliding transmission shaft, including a sliding shaft rod 1, and a fixed shaft sleeve 2 is slidably provided at both ends of the sliding shaft rod 1, wherein the sliding shaft rod 1 is a polygonal setting, and the inner part of the fixed shaft sleeve 2 cooperates with the outer peripheral wall of the sliding shaft rod 1. Through the setting of the two fixed shaft sleeves 2, the transmission shaft assembly can slide to both ends. Compared with the unidirectional sliding in the prior art, it can effectively improve the sensitivity of the transmission shaft, so that the transmission shaft does not interfere with movement when the relative position of the drive axle and the transmission frequently changes. A universal joint 3 is provided at one end of each fixed sleeve 2 away from the sliding shaft 1, and the two ends of the transmission shaft are respectively connected to the driving shaft and the driven shaft through the universal joint 3. Sliding structures 4 are provided at both ends of the outer peripheral wall of the sliding shaft 1. The setting of the sliding structure 4 is used to reduce the friction between the sliding shaft 1 and the fixed sleeve 2, so as to increase the service life of the shaft and the fixed sleeve 2. A guide structure 5 is provided inside the fixed sleeve 2 to improve the coaxiality between the sliding shaft 1 and the fixed shaft, which can improve the stability of the transmission shaft when the transmission shaft rotates at high speed;

[0027] A cooling structure 6 is provided on the outer peripheral wall of the fixed sleeve 2 near one end of the universal joint 3. The cooling structure 6 reduces the heat generated by the friction between the sliding shaft 1 and the fixed sleeve 2, thereby avoiding the problem of deformation caused by overheating of the fixed sleeve 2. A pressure relief structure 7 is provided between the two fixed sleeves 2. The pressure relief structure 7 is used to stretch the two sections of the fixed sleeves 2 so that the two fixed sleeves 2 can be reset.

[0028] In this embodiment, the two ends of the transmission shaft are respectively connected to the driving shaft and the driven shaft by a universal joint 3. By setting two fixed sleeves 2, both ends of the transmission shaft assembly can slide separately. Compared with the one-way sliding in the prior art, the sensitivity of the transmission shaft can be effectively improved so that the transmission shaft does not interfere with movement when the relative position of the drive axle and the transmission frequently changes. In addition, the three-section transmission shaft assembly composed of the sliding shaft rod 1 and the two fixed sleeves 2 can effectively disperse the pressure of inertia on the shaft rod, and can effectively improve the service life of the transmission shaft.

[0029] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the sliding structure 4 includes a rotation groove, which is opened on the outer wall of the sliding shaft 1. There are multiple rotation grooves, and the distances between adjacent rotation grooves are equal. A guide wheel 402 is provided inside the rotation groove, and a sliding rail 403 is provided inside the fixed sleeve 2 at a position corresponding to the guide wheel 402.

[0030] In this embodiment, a rotating groove is provided for installing a guide wheel 402. Since the guide wheel 402 protrudes from the outer wall of the sliding shaft 1, when the sliding shaft and the fixed sleeve slide, the sliding friction between the guide wheel 402 and the inner wall of the fixed sleeve can effectively reduce the friction between the sliding shaft and the fixed sleeve, thereby achieving the effect of increasing the service life of the transmission shaft.

[0031] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the guide structure 5 includes a guide rod 501, which is fixedly installed inside the fixed sleeve 2. Both ends of the sliding shaft 1 are provided with through grooves 502 that slide with the guide rod 501. A through pipe 503 is provided inside the guide rod 501. The through pipe 503 is bent and connected to the inside of the fixed sleeve 2.

[0032] In this embodiment, the guide rod 501 and the through groove 502 are provided to guide the sliding direction of the sliding shaft 1 and the fixed sleeve 2, so as to improve the coaxiality of the sliding shaft 1 and the fixed sleeve 2, and avoid the problem of wear of the transmission shaft caused by changes in the coaxiality. Through the provision of the through pipe 503, the cavity inside the through groove 502 and the cavity inside the fixed sleeve 2 are interconnected, so that the air pressure inside the through groove 502 and the fixed sleeve 2 is kept consistent, thereby avoiding the problem of transmission shaft shaking caused by the air pressure difference.

[0033] In a further preferred embodiment of the present invention, Figure 1-5 As shown, a connecting tube 504 is provided inside the sliding shaft 1 , and both ends of the connecting tube 504 are respectively connected to the through slots 502 provided on both sides of the sliding shaft 1 .

[0034] In this embodiment, the connecting pipe 504 is provided to interconnect the two through grooves 502, so that the air inside the two fixed sleeves 2 is interconnected, and the air pressure at both ends of the transmission shaft assembly is equal, thereby avoiding the problem of transmission shaft shaking caused by air pressure difference.

[0035] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the cooling structure 6 includes a plurality of cooling fins 601, and a plurality of welding tubes 602 are provided inside the cooling fins 601 for connecting the cooling fins 601. The cooling fins 601 are fixedly connected to the fixed sleeve 2, and the distances between adjacent cooling fins 601 are equal.

[0036] In this embodiment, the cooling fins 601 are provided to improve the heat dissipation capacity of the fixed shaft sleeve 2, thereby preventing the transmission shaft from overheating during the extension and retraction process, thereby preventing the material of the transmission shaft from being affected.

[0037] In a further preferred embodiment of the present invention, Figure 1-5As shown, the pressure relief structure 7 includes two mounting rings 701, and the two mounting rings 701 are fixedly connected to the adjacent ends of the two fixed sleeves 2 respectively. A pressure relief spring 702 is commonly connected between the two mounting rings 701, and the pressure relief spring 702 is sleeved on the outer peripheral wall of the sliding shaft 1.

[0038] In this embodiment, two mounting rings 701 are used to connect the pressure relief spring 702 and the two fixed sleeves 2. When the two fixed sleeves 2 move, the pressure relief spring 702 reduces the speed of extension and contraction of the fixed sleeves 2, thereby achieving the purpose of improving the stability of the transmission shaft.

[0039] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A three-section intermediate double-slip transmission shaft, characterized in that: The invention comprises a sliding shaft (1), fixed shaft sleeves (2) are slidably provided at both ends of the sliding shaft (1), universal joints (3) are provided at one end of the two fixed shaft sleeves (2) away from the sliding shaft (1), sliding structures (4) are provided at both ends of the outer peripheral wall of the sliding shaft (1), and a guide structure (5) is provided inside the fixed shaft sleeves (2); A cooling structure (6) is provided at one end of the outer peripheral wall of the fixed shaft sleeve (2) close to the universal joint (3), and a pressure relief structure (7) is provided between the two fixed shaft sleeves (2).

2. A three-section intermediate double-slip transmission shaft according to claim 1, characterized in that: The sliding structure (4) includes a rotation groove, which is opened on the outer wall of the sliding shaft (1). There are multiple rotation grooves, and the distances between adjacent rotation grooves are equal. A guide wheel (402) is rotated inside the rotation groove, and a sliding rail (403) is opened at a position inside the fixed sleeve (2) corresponding to the guide wheel (402).

3. The three-section intermediate double-sliding transmission shaft according to claim 2, characterized in that: The guide structure (5) includes a guide rod (501), which is fixedly mounted inside the fixed shaft sleeve (2); two ends of the sliding shaft rod (1) are provided with through grooves (502) that are slidably matched with the guide rod (501); a through pipe (503) is provided inside the guide rod (501); the through pipe (503) is bent and communicated with the inside of the fixed shaft sleeve (2).

4. The three-section intermediate double-sliding transmission shaft according to claim 3, characterized in that: A connecting tube (504) is provided inside the sliding shaft (1), and both ends of the connecting tube (504) are respectively connected to through grooves (502) provided on both sides of the sliding shaft (1).

5. The three-section intermediate double-sliding transmission shaft according to claim 4, characterized in that: The cooling structure (6) includes a plurality of cooling fins (601), and a plurality of welded pipes (602) are provided inside the cooling fins (601) for connecting the cooling fins (601). The cooling fins (601) are fixedly connected to the fixed shaft sleeve (2), and the distances between adjacent cooling fins (601) are equal.

6. The three-section intermediate double-sliding transmission shaft according to claim 5, characterized in that: The pressure relief structure (7) comprises two mounting rings (701), the two mounting rings (701) being fixedly connected to adjacent ends of two fixed shaft sleeves (2), a pressure relief spring (702) being commonly connected between the two mounting rings (701), and the pressure relief spring (702) being sleeved on the outer peripheral wall of the sliding shaft (1).

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