Protective driving shaft

Abstract

The utility model provides a protective driving shaft, and belongs to the technical field of driving shafts. The protective driving shaft comprises a driving shaft body, a gear is detachably installed on the driving shaft body through a limiting pin, and a protection assembly is arranged in one side of the driving shaft body; the protection assembly comprises at least three sliding rods sliding in the driving shaft, a pressing plate is fixed to the end face of one side of each sliding rod, end face threads are formed in the end face of the other side of each sliding rod, the pressing plates are installed in the driving shaft through springs, and a bolt is further in threaded connection with the interior of the driving shaft. According to the gear transmission device, through supporting of the supporting ring, when the driving shaft falls off, the supporting ring can make contact with the ground firstly, and damage caused by the fact that the gear collides with the ground is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the field of driving shafts, in particular to a protective driving shaft. Background Art

[0002] The driving shaft is mostly used in front-wheel drive vehicles. In addition to transmitting power from the gearbox to the left and right front wheels, it also needs to cooperate with changes in steering angles. Gears, bearings and other components generally need to be installed on the driving shaft. When the driving shaft falls, the bearings or gears will directly contact the ground. The resulting impact will damage the bearings or gears, thereby affecting the use of the bearings or gears. Utility Model Content

[0003] The utility model aims at the deficiencies of the prior art and provides a protective driving shaft.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a protective driving shaft, comprising a driving shaft, on which a gear is detachably mounted via a limit pin, characterized in that: a protective component is provided inside one side of the driving shaft;

[0005] The protection component includes a sliding rod sliding in the active shaft, and the sliding rod is provided with at least three. A pressure plate is fixed to the end face of one side of the sliding rod, and an end face thread is opened on the end face of the other side. The pressure plate is installed in the active shaft through a spring. A bolt is also threadedly connected in the active shaft, and the end face of the bolt is engaged with the end face of the sliding rod.

[0006] Optionally, at least three supporting ring grooves are formed on the outer circumference of the driving shaft, a working cavity is formed at the center of the supporting ring groove of the driving shaft, and at least two pressure plate grooves are formed on one side of the working cavity.

[0007] Optionally, the sliding rod passes through the support ring groove, and part of it is located in the working chamber. A support ring is fixed on the top of the support ring, the support ring is consistent with the support ring groove, the pressure plate slides in the pressure plate groove, and the spring is installed at the bottom of the pressure plate groove.

[0008] Optionally, the bolt is threadedly connected to one end face of the driving shaft, one end face of the bolt is provided with an end face thread which cooperates with the sliding rod thread, an internal thread is provided on the inner wall of the driving shaft, and an external thread is provided on the outer peripheral side of the bolt.

[0009] Optionally, the internal thread and the external thread cooperate with each other, and the bolt is divided into a threaded end and a smooth end, wherein the threaded end is located on the side close to the sliding rod, the smooth end and the internal thread are located at the same position, and the length of the internal thread is consistent with the length of the smooth end.

[0010] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. Due to the setting of the protection component, the support ring can be used to support the driving shaft. When the driving shaft falls, the support ring will touch the ground first, effectively preventing the gear from hitting the ground and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the utility model.

[0013] Figure 2 It is a cross-sectional view of the utility model.

[0014] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0015] 10. driving shaft; 11. gear; 12. limit pin; 13. bolt; 14. pressure plate; 15. slide bar; 16. support ring; 17. pressure plate groove; 18. support ring groove; 19. internal thread; 20. external thread. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0017] As shown in Figure 1-3, a protective driving shaft includes a driving shaft 10, on which a gear 11 is detachably installed through a limit pin 12, and is characterized in that: a protective component is provided inside one side of the driving shaft 10, and the protective component includes a slide rod 15 sliding in the driving shaft 10, and there are at least three slide rods 15. A pressure plate 14 is fixed to the end face of one side of the slide rod 15, and an end face thread is opened on the other end face. The pressure plate 14 is installed in the driving shaft 10 through a spring, and a bolt 13 is also threadedly connected in the driving shaft 10, and the end face of the bolt 13 is meshed with the end face of the slide rod 15.

[0018] At least three support ring grooves 18 are provided on the outer peripheral side of the driving shaft 10, and a working chamber is provided at the center of the support ring groove 18 of the driving shaft 10. At least two pressure plate grooves 17 are provided on one side of the working chamber. The sliding rod 15 passes through the support ring groove 18, and part of it is located in the working chamber. A support ring 16 is fixed on the top of the support ring 16, and the support ring 16 is consistent with the support ring groove 18. The pressure plate 14 slides in the pressure plate groove 17, and the spring is installed at the bottom of the pressure plate groove 17.

[0019] The bolt 13 is threadedly connected to one end face of the driving shaft 10. One end face of the bolt 13 is provided with an end face thread, which cooperates with the thread of the sliding rod 15. An internal thread 19 is provided on the inner wall of the driving shaft 10, and an external thread 20 is provided on the outer peripheral side of the bolt 13. The internal thread 19 and the external thread 20 cooperate with each other. The bolt 13 is divided into a threaded end and a smooth end, wherein the threaded end is located on the side close to the sliding rod 15, and the smooth end and the internal thread 19 are located at the same position, and the length of the internal thread 19 is consistent with the length of the smooth end.

[0020] During use, when the gear 11 needs to be protected, the bolt 13 is rotated to gradually move the bolt 13 toward the side close to the gear 11 through the arrangement of the internal thread 19 and the external thread 20. When the external thread 20 is disengaged from the internal thread 19, the end face of the bolt 13 just abuts against the end face of the slide bar 15, and the end face threads of the two are meshed with each other. Then the bolt 13 is continued to be rotated to drive the slide bar 15 to move toward the side away from the center line of the driving shaft 10 through the end face thread. Then the slide bar 15 drives the pressure plate 14 to stretch the spring, and at the same time drives the support ring 16 to move outward until the support ring 16 is higher than the position of the gear 11. At this time, with the support of the support ring 16, when the driving shaft 10 falls, the support ring 16 will touch the ground first, effectively preventing the gear 11 from hitting the ground and causing damage. When no protection is needed, the bolt 13 can be pulled outward and rotated in the opposite direction at the same time, so that the external thread 20 and the internal thread 19 can be threaded together, and then the bolt 13 moves outward and disengages from the slide bar 15. At this time, under the tension of the spring, the slide bar 15 and the support ring 16 are driven to move to the side close to the driving shaft 10 until the support ring 16 completely enters the support ring groove 18, and then the gear 11 can be installed and removed.

[0021] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A protective driving shaft, comprising a driving shaft (10), on which a gear (11) is detachably mounted via a stop pin (12), characterized in that: A protection component is provided inside one side of the driving shaft (10); The protection component comprises a slide bar (15) sliding in the driving shaft (10), wherein the slide bar (15) is provided with at least three, a pressure plate (14) is fixed on one end face of the slide bar (15), and an end face thread is provided on the other end face, the pressure plate (14) is installed in the driving shaft (10) through a spring, and a bolt (13) is also threadedly connected in the driving shaft (10), and the end face of the bolt (13) is meshed with the end face of the slide bar (15).

2. A protective driving shaft according to claim 1, characterized in that: At least three supporting ring grooves (18) are provided on the outer circumference of the driving shaft (10), a working cavity is provided at the center of the supporting ring groove (18) of the driving shaft (10), and at least two pressure plate grooves (17) are provided on one side of the working cavity.

3. A protective driving shaft according to claim 2, characterized in that: The slide rod (15) passes through the support ring groove (18), and a part of it is located in the working chamber. A support ring (16) is fixed on the top of the support ring (16), and the support ring (16) is consistent with the support ring groove (18). The pressure plate (14) slides in the pressure plate groove (17), and the spring is installed at the bottom of the pressure plate groove (17).

4. The protective driving shaft according to claim 1, characterized in that: The bolt (13) is threadedly connected to one end face of the driving shaft (10), one end face of the bolt (13) is provided with an end face thread, which is threadedly matched with the slide rod (15), an internal thread (19) is provided on the inner wall of the driving shaft (10), and an external thread (20) is provided on the outer peripheral side of the bolt (13).

5. A protective driving shaft according to claim 4, characterized in that: The internal thread (19) and the external thread (20) cooperate with each other, and the bolt (13) is divided into a threaded end and a smooth end, wherein the threaded end is located on a side close to the slide rod (15), and the smooth end and the internal thread (19) are located at the same position, and the length of the internal thread (19) is consistent with the length of the smooth end.

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