Dustproof transmission shaft

Abstract

The dustproof transmission shaft comprises a spline shaft, a spline sleeve, a corrugated telescopic sleeve and a locking mechanism, the locking mechanism comprises lock bodies, a lock beam and an elastic telescopic spring bolt assembly, the lock bodies are annular, the two lock bodies are coaxially and fixedly connected with the outer wall of the spline shaft and the outer wall of the spline sleeve respectively, and the spline shaft and the spline sleeve are sleeved with the corrugated telescopic sleeve. Two end surfaces of the corrugated telescopic sleeve are hermetically connected with the inner side surfaces of the two lock bodies respectively; the roots of the lock beams are fixedly connected with the end face of the corrugated telescopic sleeve; a hole site is formed in the outer wall of the circumference of the lock body, a lock beam hole is formed in the inner side face of the lock body, the hole site is communicated with the lock beam hole, the elastic telescopic spring bolt assembly is installed in the hole site, the lock beam is slidably connected with the lock beam hole, and a bolt part of the elastic telescopic spring bolt assembly can be clamped and locked with a bolt groove of the lock beam. According to the dustproof transmission shaft, the defect that impurities such as dust and gravels easily enter the space between the spline shaft and the spline housing can be overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shafts, in particular to a dustproof transmission shaft. Background Art

[0002] The drive shaft is a high-speed, low-support rotating body, and is an important component of the vehicle. It generally includes universal joint assemblies at both ends and a spline sleeve and spline shaft that can be telescopically connected in the middle. One end of the universal joint is connected to the driving component, and the other end of the universal joint is connected to the driven component. During the driving process of the vehicle, the distance between the driving component and the driven component will change frequently due to bumps and other reasons. The drive shaft compensates for the change in the distance between the driving component and the driven component through the sliding and telescopic action of the spline shaft in the spline sleeve.

[0003] However, the spline shaft and the spline sleeve are clearance fits, and impurities such as dust and gravel can easily enter between the spline shaft and the spline sleeve during vehicle driving, causing wear of the spline shaft and the spline sleeve and reducing the life of the drive shaft.

[0004] Therefore, it is necessary to develop a dustproof transmission shaft for the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a dustproof transmission shaft, which can solve the defect that impurities such as dust and gravel easily enter between the spline shaft and the spline sleeve.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses a dustproof transmission shaft, comprising a spline shaft, a spline sleeve, a corrugated telescopic sleeve and a locking mechanism, wherein the locking mechanism comprises a lock body, a lock beam and an elastic telescopic lock tongue assembly, the lock body is annular, two lock bodies are coaxially fixedly connected with the outer walls of the spline shaft and the spline sleeve respectively, the corrugated telescopic sleeve is arranged outside the spline shaft and the spline sleeve, and the two end surfaces of the corrugated telescopic sleeve are respectively sealed and connected with the inner side surfaces of the two lock bodies; a plurality of lock beams are evenly distributed around the circumference and the roots are fixedly connected with the end surfaces of the corrugated telescopic sleeves; a hole position is provided on the circumferential outer wall of the lock body, a lock beam hole is provided on the inner side surface of the lock body, the hole position is communicated with the lock beam hole, the elastic telescopic lock tongue assembly is installed in the hole position, the lock beam is slidably connected with the lock beam hole, and the tongue portion of the elastic telescopic lock tongue assembly can be engaged with and locked with the tongue groove of the lock beam.

[0008] Furthermore, the elastically retractable lock tongue assembly includes a lock tongue pin, a compression spring, an end cover and a baffle, the tongue portion is arranged at the inner end of the lock tongue pin; the end cover is fixedly connected to the end of the hole, the lock tongue pin slides through the end cover and the tongue portion extends into the bottom of the hole, the rod portion of the lock tongue pin is coaxially fixedly connected to the baffle, the compression spring is sleeved outside the lock tongue pin, one end of the compression spring abuts against the inner side surface of the end cover, and the other end of the compression spring abuts against the outer side surface of the baffle.

[0009] Furthermore, it also includes an end cap, which is fixedly connected to the outer end of the locking tongue pin.

[0010] Furthermore, a slide groove is provided on the inner wall of the hole, and the slide groove is arranged along the length direction of the lock tongue pin. A slider is integrally formed on the circumferential outer wall of the baffle, and the slider matches and is slidably connected to the slide groove, and the tongue is preset to be oriented in a locked state.

[0011] Furthermore, the root of the locking beam and the end surface of the corrugated expansion sleeve are specifically connected by threads, and a fastening glue is provided at the threaded connection.

[0012] Furthermore, it also includes a sealing ring. The inner side of the lock body is provided with a groove, the groove is located outside the lock beam hole, the sealing ring is arranged in the groove, and the sealing ring abuts against the end surface of the corrugated telescopic sleeve.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] The utility model provides a dustproof transmission shaft, wherein the end face of the corrugated telescopic sleeve is sealingly connected to the inner side face of the lock body, so that impurities such as dust and gravel can be blocked outside the corrugated telescopic sleeve, thereby preventing impurities such as dust and gravel from entering between the spline shaft and the spline sleeve, thereby extending the service life of the transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the main structure of the dustproof transmission shaft of the utility model;

[0017] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the bolt pin and the baffle of the utility model;

[0020] Figure 5It is a schematic diagram of the three-dimensional structure of the lock beam of the utility model.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. spline shaft; 2. spline sleeve; 3. corrugated expansion sleeve; 4. lock body; 401. lock beam hole; 5. lock beam; 501. tongue groove; 6. lock tongue pin; 601. tongue; 7. compression spring; 8. end cover; 9. baffle; 901. slider; 10. end cap; 11. slide groove; 12. sealing ring. DETAILED DESCRIPTION

[0022] The core of the utility model is to provide a dustproof transmission shaft, which can solve the defect that impurities such as dust and gravel can easily enter between the spline shaft and the spline sleeve.

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the main structure of the dustproof transmission shaft of the utility model; Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model; Figure 3 for Figure 2 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the three-dimensional structure of the bolt pin and the baffle of the utility model; Figure 5 It is a schematic diagram of the three-dimensional structure of the lock beam of the utility model.

[0026] In a specific embodiment of the present invention, Figures 1 to 5As shown, it includes a spline shaft 1, a spline sleeve 2, a corrugated telescopic sleeve 3 and a locking mechanism, the locking mechanism includes a lock body 4, a lock beam 5 and an elastic telescopic lock tongue assembly, the lock body 4 is annular, the two lock bodies 4 are coaxially fixedly connected to the outer walls of the spline shaft 1 and the spline sleeve 2, respectively, the corrugated telescopic sleeve 3 is sleeved outside the spline shaft 1 and the spline sleeve 2, and the two end faces of the corrugated telescopic sleeve 3 are respectively sealed and connected to the inner side faces of the two lock bodies 4; a plurality of lock beams 5 are evenly distributed around the circumference and the roots are fixedly connected to the end faces of the corrugated telescopic sleeve 3; a hole position is opened on the circumferential outer wall of the lock body 4, a lock beam hole 401 is opened on the inner side face of the lock body 4, the hole position is connected to the lock beam hole 401, the elastic telescopic lock tongue assembly is installed in the hole position, the lock beam 5 is slidably connected to the lock beam hole 401, and the tongue portion 601 of the elastic telescopic lock tongue assembly can be engaged and locked with the tongue groove 501 of the lock beam 5.

[0027] Specifically, the lock body 4 can be connected to the outer walls of the spline shaft 1 and the spline sleeve 2 by welding, and the lock body 4 on the spline shaft 1 can be set at the optical axis section of the spline shaft 1. The bellows expansion sleeve 3 is made of rubber or other soft elastic materials in the prior art, and the end face of the bellows expansion sleeve 3 is sealed and connected to the inner side of the lock body 4, so that dust, gravel and other impurities can be blocked outside the bellows expansion sleeve 3, thereby preventing dust, gravel and other impurities from entering between the spline shaft 1 and the spline sleeve 2. The basic principle of the locking mechanism is the same as that of the common padlocks in life, that is, the tongue 601 with a triangular cross section and the edge of the tongue groove 501 with a triangular cross section are mutually engaged and locked.

[0028] The elastic telescopic lock tongue assembly includes a lock tongue pin 6, a compression spring 7, an end cover 8 and a baffle 9, and the tongue portion 601 is arranged at the inner end of the lock tongue pin 6; the end cover 8 is fixedly connected to the end of the hole, the lock tongue pin 6 slides through the end cover 8 and the tongue portion 601 penetrates into the bottom of the hole, the rod portion of the lock tongue pin 6 is coaxially fixedly connected to the baffle 9, the compression spring 7 is sleeved on the outside of the lock tongue pin 6, one end of the compression spring 7 abuts against the inner side surface of the end cover 8, and the other end of the compression spring 7 abuts against the outer side surface of the baffle 9.

[0029] Specifically, the end cap 8 can be connected to the hole by welding or threading. When threading is used, at least two blind holes need to be opened on the top surface of the end cap 8, and calipers are used to insert into the blind holes and screw the end cap 8. When installing the bellows expansion sleeve 3, the outer end of the lock tongue pin 6 is clamped by hand or pliers and pulled outward, and the compression spring 7 is compressed at the same time, and then the lock beam 5 is inserted into the lock beam hole 401 and the end face of the bellows expansion sleeve 3 is abutted against the inner side of the lock body 4, the lock tongue pin 6 is released, and the outer end of the lock tongue pin 6 is gently clamped and rotated. When the direction of the tongue 601 is aligned with the tongue groove 501, the compression spring 7 pushes the baffle 9 to move, and the baffle 9 drives the lock tongue pin 6 to move, then the tongue 601 is inserted into the tongue groove 501 and locked, and the direction of the tongue 601 is the direction of the locked state. When disassembling the bellows telescopic sleeve 3, pull the lock tongue pin 6 outward to disengage the tongue portion 601 from the tongue groove 501, and then pull the bellows telescopic sleeve 3 to disengage the lock beam 5 from the lock beam hole 401, and the disassembly is completed.

[0030] It also includes an end cap 10 which is fixedly connected to the outer end of the locking bolt pin 6 .

[0031] Specifically, the end cap 10 is convenient to be clamped by hand or pliers, thereby facilitating the operation of the locking bolt pin 6 .

[0032] A slide groove 11 is provided on the inner wall of the hole, and the slide groove 11 is arranged along the length direction of the lock tongue pin 6. A slider 901 is integrally formed on the circumferential outer wall of the baffle 9. The slider 901 matches and is slidably connected with the slide groove 11, and the tongue 601 is preset to the locked state direction.

[0033] Specifically, the slide groove 11 limits the slider 901, and the slider 901 can only slide along the slide groove 11, so that the lock tongue pin 6 cannot rotate. When installing the corrugated telescopic sleeve 3, the lock beam 5 is inserted into the lock beam hole 401, and the end of the lock beam 5 slides relative to the surface of the tongue 601, and the lock tongue pin 6 is forced to move upward. At the same time, the compression spring 7 is compressed. When the bottom edge of the tongue 601 abuts against the circumferential surface of the lock beam 5, the lock beam 5 continues to be inserted. When the tongue 601 is aligned with the tongue groove 501, the compression spring 7 pushes the baffle 9 to move, and the baffle 9 drives the lock tongue pin 6 to move, and the tongue 601 is inserted into the tongue groove 501 and locked. In this way, there is no need to manually operate the lock tongue pin 6 when installing the corrugated telescopic sleeve 3, thereby facilitating the installation of the corrugated telescopic sleeve 3 and improving work efficiency.

[0034] The root of the locking beam 5 is connected to the end surface of the corrugated expansion sleeve 3 by threaded connection, and a fastening glue is provided at the threaded connection.

[0035] It also includes a sealing ring 12. A groove is provided on the inner side of the lock body 4. The groove is located outside the lock beam hole 401. The sealing ring 12 is arranged in the groove. The sealing ring 12 abuts against the end surface of the corrugated telescopic sleeve 3.

[0036] Specifically, the sealing ring 12 seals the gap between the inner side surface of the lock body 4 and the end surface of the bellows expansion sleeve 3 , thereby effectively ensuring that the two end surfaces of the bellows expansion sleeve 3 are respectively sealed and connected to the two inner side surfaces of the lock body 4 .

[0037] The utility model discloses a dustproof working principle of a dustproof transmission shaft: the end face of the bellows expansion sleeve 3 is sealed with the inner side face of the lock body 4 by a sealing ring 12, so that impurities such as dust and gravel can be blocked outside the bellows expansion sleeve 3, thereby preventing impurities such as dust and gravel from entering between the spline shaft 1 and the spline sleeve 2.

[0038] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other, and the embodiments can be combined with each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0039] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A dustproof transmission shaft, characterized in that: The invention comprises a spline shaft (1), a spline sleeve (2), a corrugated telescopic sleeve (3) and a locking mechanism, wherein the locking mechanism comprises a lock body (4), a lock beam (5) and an elastic telescopic lock tongue assembly, wherein the lock body (4) is annular, and two lock bodies (4) are coaxially fixedly connected to the outer walls of the spline shaft (1) and the spline sleeve (2), respectively, and the corrugated telescopic sleeve (3) is sleeved outside the spline shaft (1) and the spline sleeve (2), and the two end surfaces of the corrugated telescopic sleeve (3) are respectively sealed and connected to the inner side surfaces of the two lock bodies (4); A plurality of locking beams (5) are evenly distributed around the circumference and their roots are fixedly connected to the end surface of the corrugated telescopic sleeve (3); a hole is provided on the circumferential outer wall of the lock body (4); a locking beam hole (401) is provided on the inner side surface of the lock body (4); the hole is communicated with the locking beam hole (401); the elastic telescopic lock tongue assembly is installed in the hole; the locking beam (5) is slidably connected to the locking beam hole (401); and the tongue portion (601) of the elastic telescopic lock tongue assembly can be engaged with and locked in the tongue groove (501) of the locking beam (5).

2. The dustproof transmission shaft according to claim 1, characterized in that: The elastic telescopic lock tongue assembly comprises a lock tongue pin (6), a compression spring (7), an end cover (8) and a baffle (9); the tongue portion (601) is arranged at the inner end of the lock tongue pin (6); the end cover (8) is fixedly connected to the end of the hole; the lock tongue pin (6) slides through the end cover (8) and the tongue portion (601) penetrates into the bottom of the hole; the rod portion of the lock tongue pin (6) is coaxially fixedly connected to the baffle (9); the compression spring (7) is sleeved outside the lock tongue pin (6); one end of the compression spring (7) abuts against the inner side surface of the end cover (8), and the other end of the compression spring (7) abuts against the outer side surface of the baffle (9).

3. The dustproof transmission shaft according to claim 2, characterized in that: It also comprises an end cap (10), wherein the end cap (10) is fixedly connected to the outer end of the locking bolt pin (6).

4. The dustproof transmission shaft according to claim 2 or 3, characterized in that: A slide groove (11) is provided on the inner wall of the hole, and the slide groove (11) is arranged along the length direction of the lock tongue pin (6). A slider (901) is integrally formed on the circumferential outer wall of the baffle (9), and the slider (901) matches and is slidably connected with the slide groove (11), and the tongue (601) is preset to be in a locked state orientation.

5. The dustproof transmission shaft according to claim 1, characterized in that: The root of the locking beam (5) and the end surface of the corrugated telescopic sleeve (3) are specifically connected by threads, and a fastening glue is provided at the threaded connection.

6. The dustproof transmission shaft according to claim 1, characterized in that: It also includes a sealing ring (12), the inner side surface of the lock body (4) is provided with a groove, the groove is located outside the lock beam hole (401), the sealing ring (12) is arranged in the groove, and the sealing ring (12) abuts against the end surface of the corrugated telescopic sleeve (3).

Images