Gear shifting shaft assembly

Abstract

The utility model relates to the technical field of gear shifting shafts, in particular to a gear shifting shaft assembly which comprises an output shaft, a lantern ring is slidably sleeved at the position, close to the middle, of the outer surface of the output shaft, an annular groove is formed in the side surface of the lantern ring, sliding grooves are formed in the surfaces of the two sides of the annular groove, and four sets of spline rods are installed on the two sides of the lantern ring. And a first-gear gear and a second-gear gear are respectively mounted on the outer surface of the output shaft close to the two sides of the lantern ring. Through the arrangement of the mounting rod, the through hole, the pin hole, the communicating hole, a pin rod, a fixing rod, a fixing hole, a screw rod, a nut and other parts, the problems that an existing gear shifting shaft is installed with a supporting rod in a threaded connection mode only through a threaded rod, a fixing nut and a connecting block, but the gear shifting shaft inevitably vibrates in actual operation, and therefore the gear shifting shaft cannot be damaged under the effect of long-term vibration can be effectively solved. The problems that the gear shifting shaft and the supporting rod are loosened due to the fact that the fixing nut and the connecting block are loosened on the outer surface of the threaded rod, and normal use of the gear shifting shaft is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of shift shaft technology, specifically a shift shaft assembly. Background Technology

[0002] The shift shaft assembly is an important component used in automotive transmissions for gear selection and shifting operations. The transmission works by changing the gear ratio to expand the range of vehicle driving force and speed to meet different driving conditions.

[0003] A search revealed a shift shaft assembly with application number 201820642683.4. In this design, the shift shaft is only screwed to the support rod via a threaded rod, a fixing nut, and a connecting block. However, in actual operation, the shift shaft will inevitably vibrate. Under long-term vibration, the fixing nut and connecting block will inevitably loosen on the outer surface of the threaded rod, resulting in loosening between the shift shaft and the support rod, which in turn affects the normal use of the shift shaft. Therefore, corresponding improvements are needed to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a shift shaft assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shift shaft assembly, including a connecting block and an output shaft. A collar is slidably fitted onto the outer surface of the output shaft near the center, and an annular groove is formed on the side surface of the collar. Sliding grooves are formed on both sides of the annular groove. Four sets of splined rods are installed on both sides of the collar. A first-gear and a second-gear are respectively installed on the outer surface of the output shaft near the collar, and four sets of splined holes are formed inside both the first-gear and the second-gear. Sliding grooves are slidably arranged inside each of the sliding grooves. A slider is provided, with one side of the slider being installed on the corresponding side of the shift fork. A mounting rod is installed at the top of the shift fork, and a through hole is provided inside the mounting rod. A pin hole is provided on the inner wall of the bottom end of the through hole, and a connecting hole is provided on the inner wall of the top end of the through hole. A pin is movably inserted into the connecting hole, and a fixing rod is movably inserted into the through hole. A fixing hole is provided inside the fixing rod, and a screw is installed at one end of the fixing rod, with a nut movably screwed onto the outer surface of the screw. The shift shaft body is installed at the other end of the fixing rod.

[0006] Preferably, the outer diameter of the spline rod is adapted to the inner diameter of the spline hole, and the spline rod and the spline hole are arranged in a corresponding manner.

[0007] Preferably, the shift fork is located inside the annular groove, and the shift fork is slidably connected to the inside of the annular groove.

[0008] Preferably, the connecting hole extends through the inner wall of the top of the through hole, and the bottom of the connecting hole is connected to the interior of the through hole.

[0009] Preferably, the connecting hole and the pin hole are arranged vertically in correspondence.

[0010] Preferably, the outer diameter of one end of the pin is adapted to the inner diameter of the fixing hole and the pin hole, and one end of the pin passes through the fixing hole into the interior of the fixing rod and is movably engaged with the interior of the pin hole.

[0011] Preferably, one end of the fixing rod passes through the interior of the mounting rod via a through hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By incorporating components such as mounting rods, through holes, pin holes, connecting holes, pin rods, fixing rods, fixing holes, screws, and nuts, the problem of existing shift shafts being installed solely through threaded rods, fixing nuts, and connecting blocks to the support rods is effectively solved. However, in actual operation, shift shafts inevitably vibrate, and under long-term vibration, the fixing nuts and connecting blocks will inevitably loosen on the outer surface of the threaded rods, leading to loosening between the shift shaft and the support rod, thus affecting the normal use of the shift shaft. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the main body of this utility model.

[0015] Figure 2 This is a three-dimensional structural diagram of the output shaft of this utility model.

[0016] Figure 3 This is a three-dimensional cross-sectional view of the mounting rod of this utility model.

[0017] In the diagram: 1. Output shaft; 11. Collar; 12. Annular groove; 13. Slide groove; 14. Spline rod; 15. First gear; 16. Second gear; 17. Spline hole; 2. Slider; 21. Shift fork; 22. Mounting rod; 23. Through hole; 24. Pin hole; 25. Connecting hole; 26. Pin; 3. Fixing rod; 31. Fixing hole; 32. Screw; 33. Nut; 34. Shift shaft body. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] according to Figures 1-3 As shown, the device includes an output shaft 1. A collar 11 is slidably fitted on the outer surface of the output shaft 1 near the middle position. An annular groove 12 is formed on the side surface of the collar 11. Sliding grooves 13 are formed on both sides of the annular groove 12. Four sets of splined rods 14 are installed on both sides of the collar 11. A first gear 15 and a second gear 16 are respectively installed on the outer surface of the output shaft 1 near the collar 11. Four sets of splined holes 17 are formed inside the first gear 15 and the second gear 16. The outer diameter of the second gear 16 is larger than the outer diameter of the first gear 15. The outer diameter of the splined rod 14 is matched with the inner diameter of the splined hole 17, and the splined rod 14 and the splined hole 17 are arranged in a corresponding manner.

[0020] Sliding sliders 2 are slidably installed inside the slide groove 13, and one side of each sliding slider 2 is installed with the corresponding side of the shift fork 21. The shift fork 21 is located inside the annular groove 12 and is slidably connected to the annular groove 12. Both the sliding slider 2 and the shift fork 21 are arc-shaped. The arc of the sliding slider 2 matches the arc of the slide groove 13, and the arc of the shift fork 21 matches the arc of the annular groove 12. An installation rod 22 is installed at the top of the shift fork 21, and a through hole 23 is opened inside the installation rod 22. A pin hole 24 is opened on the inner wall of the bottom end of the through hole 23, and a connecting hole 25 is opened on the inner wall of the top end of the through hole 23. The connecting hole 25 passes through the inner wall of the top end of the through hole 23, and the bottom end of the connecting hole 25 is connected to the inside of the through hole 23. The connecting hole 25 and the pin hole 24 are arranged vertically. A pin 26 is movably inserted into the inside of the connecting hole 25.

[0021] A fixing rod 3 is movably inserted into the through hole 23, and a fixing hole 31 is formed inside the fixing rod 3. One end of the fixing rod 3 passes through the through hole 23 and enters the interior of the mounting rod 22. The outer diameter of one end of the pin 26 is adapted to the inner diameter of the fixing hole 31 and the pin hole 24, and one end of the pin 26 passes through the fixing hole 31 and enters the interior of the fixing rod 3, and is movably engaged with the interior of the pin hole 24. A screw 32 is installed on one end of the fixing rod 3, and a nut 33 is movably screwed onto the outer surface of the screw 32. A shift shaft body 34 is installed on the other end of the fixing rod 3.

[0022] The other end of the shift shaft body 34 is connected to the shift lever, allowing the shift lever to control the forward and backward movement of the shift shaft body 34. In use, one end of the fixing rod 3 can be inserted into the through hole 23, allowing the fixing rod 3 and the screw 32 to pass through the through hole 23 into the mounting rod 22. After that, the nut 33 can be screwed onto the outer surface of the screw 32 and rotated, so that the inner surface of the nut 33 can fit tightly against the outer surface of the mounting rod 22, allowing the fixing rod 3 and the screw 32 to be initially screwed onto the mounting rod 22. At this time, the pin hole 24, the connecting hole 25, and the fixing hole 31 are on the same horizontal plane. After that, the pin 26 can be inserted into the connecting hole 25, allowing the bottom end of the pin 26 to pass through the fixing hole 31 into the fixing rod 3 and be locked into the pin hole 24, thus further screwing the fixing rod 3 and the screw 32 onto the mounting rod 22.

[0023] When shifting gears, the shift shaft assembly simply requires pushing the shift lever forward slightly. This moves the shift shaft body 34 and mounting rod 22 forward, causing the shift fork 21 and slider 2 to move forward as well. This allows the collar 11 to move forward on the outer surface of the output shaft 1, enabling the four sets of splined rods 14 located on one side of the collar 11 to extend into the four sets of splined holes 17 inside the first gear 15, thus shifting into first gear. When the first gear 15 rotates, it drives the output shaft 1 and collar 11 to rotate accordingly, allowing the two sets of sliders 2 to slide within their corresponding grooves 13. The shift fork 21, on the other hand, moves within the annular groove 12. When the shift lever is pushed back slightly, the shift shaft body 34 and mounting rod 22 move backward, causing the shift fork 21 and slider 2 to move backward. This allows the collar 11 to move backward on the outer surface of the output shaft 1, enabling the four sets of splined rods 14 located on the other side of the collar 11 to extend into the four sets of splined holes 17 inside the second gear 16 and pass through the splined holes 17 into the second gear 16. At this time, the gear can be switched to second gear. When the second gear 16 rotates, it drives the output shaft 1 and collar 11 to rotate accordingly, allowing the two sets of sliders 2 to slide in the corresponding slide grooves 13, and the shift fork 21 to slide in the annular groove 12.

[0024] 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. A shift shaft assembly, comprising an output shaft (1), characterized in that: A collar (11) is slidably fitted on the outer surface of the output shaft (1) near the middle position, and an annular groove (12) is formed on the side surface of the collar (11). Sliding grooves (13) are formed on both sides of the annular groove (12). Four sets of spline rods (14) are installed on both sides of the collar (11). A first gear (15) and a second gear (16) are respectively installed on the outer surface of the output shaft (1) near the collar (11). Four sets of spline holes (17) are formed inside the first gear (15) and the second gear (16). A slider (2) is slidably arranged inside the sliding groove (13), and one side of the slider (2) is respectively installed with the corresponding side of the shift fork (21). The gear shift fork (21) is configured such that a mounting rod (22) is installed at the top, and a through hole (23) is provided inside the mounting rod (22). A pin hole (24) is provided on the inner wall of the bottom end of the through hole (23), and a connecting hole (25) is provided on the inner wall of the top end of the through hole (23). A pin (26) is movably inserted into the connecting hole (25). A fixing rod (3) is movably inserted into the through hole (23), and a fixing hole (31) is provided inside the fixing rod (3). A screw (32) is installed at one end of the fixing rod (3), and a nut (33) is movably screwed onto the outer surface of the screw (32). A gear shift shaft body (34) is installed at the other end of the fixing rod (3).

2. The shift shaft assembly according to claim 1, characterized in that: The outer diameter of the spline rod (14) is adapted to the inner diameter of the spline hole (17), and the spline rod (14) and the spline hole (17) are arranged in a corresponding manner.

3. A shift shaft assembly according to claim 1, characterized in that: The shift fork (21) is located inside the annular groove (12) and is slidably connected to the inside of the annular groove (12).

4. A shift shaft assembly according to claim 1, characterized in that: The connecting hole (25) extends through the inner wall of the top of the through hole (23), and the bottom end of the connecting hole (25) is connected to the interior of the through hole (23).

5. A shift shaft assembly according to claim 1, characterized in that: The connecting hole (25) and the pin hole (24) are arranged vertically in correspondence.

6. A shift shaft assembly according to claim 1, characterized in that: The outer diameter of one end of the pin (26) is adapted to the inner diameter of the fixing hole (31) and the pin hole (24), and one end of the pin (26) passes through the fixing hole (31) into the interior of the fixing rod (3) and is movably engaged with the interior of the pin hole (24).

7. A shift shaft assembly according to claim 1, characterized in that: One end of the fixing rod (3) passes through the through hole (23) and enters the interior of the mounting rod (22).

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