Novel commercial vehicle gear shifting mechanism system

Abstract

A novel commercial vehicle gear shifting mechanism system comprises a gear shifting air cylinder assembly and a shifting fork, the shifting fork is connected to a piston rod of the gear shifting air cylinder assembly and driven by the piston rod to move, the shifting fork is connected with an inner gear ring for gear shifting after being driven by the shifting fork to slide left and right, the shifting fork is provided with a connecting part connected with the piston rod, and a shifting fork limiting block is fixed to the connecting part. The gear shifting air cylinder assembly is provided with a ball head elastic stud, and the ball head elastic stud can be matched with the shifting fork limiting block for gear positioning. The maintenance cost is reduced; the gear shifting smoothness and the operation convenience are improved; the response speed of gear shifting is increased; and the adaptive capacity of the gear shifting mechanism system under different working conditions is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gear shifting device technical field, concretely relates to a novel commercial vehicle gear shifting mechanism system. BACKGROUND

[0002] The design of gear shifting mechanism directly influences the driving performance and the comfort of operation of vehicle, and at present, the gear shifting mechanism of new energy heavy truck commercial vehicle mainly relies on mechanical or hydraulic system, the mechanical gear shifting is simple, but is easy to produce the jam when shifting, increases the driving difficulty, the hydraulic gear shifting is quick in response and smooth in shifting, but the system is relatively complex, and the performance will be attenuated under high temperature or low temperature environment.

[0003] The existing pneumatic gear shifting device, such as CN217583131U, comprises: a cylinder and a shift fork;The cylinder is provided with a stepped cavity, and the stepped cavity comprises a middle cavity, a transition cavity and a large cavity from left to right;The stepped cavity is provided with a middle piston, a large piston, a small piston and a piston rod;The middle piston is matched with the middle cavity, the large piston is matched with the large cavity, the large piston is provided with a piston groove, the piston groove extends into the transition cavity, and the small piston is matched with the piston groove;The left end of the piston rod is connected with the middle piston, and the right end of the piston rod is connected with the small piston after penetrating through the piston groove;The outer wall of the piston rod is provided with a limiting ring, and the limiting ring limits the length of the piston rod inserted into the piston groove;The cylinder is provided with an air inlet, a left air inlet channel and a right air inlet channel, the middle cavity of the cylinder is communicated with the air inlet through the left air inlet channel, and the large cavity is communicated with the air inlet through the right air inlet channel;The cylinder is provided with electromagnetic valves for controlling the opening and closing of the left air inlet channel and the right air inlet channel respectively;The piston rod is connected with the shift fork. Although the patent can accurately control the pressure in the cylinder by the electromagnetic valve, drive the piston movement, realize the movement of the shift fork and shift, but it still has the problems of uneven shifting and poor gear position keeping. SUMMARY

[0004] In order to overcome the defects of the prior art, the utility model provides a novel commercial vehicle gear shifting mechanism system, the shift fork can move smoothly to realize efficient gear shifting, and has gear position keeping function, which ensures the reliability of gear position use after gear shifting.

[0005] The technical scheme adopted by the utility model is:

[0006] A novel commercial vehicle gear shifting mechanism system, comprising a gear shifting cylinder assembly and a shift fork, the shift fork is connected to the piston rod of the gear shifting cylinder assembly and is driven to move by the piston rod, the shift fork is connected to the inner gear ring driven to slide left and right to shift, the shift fork is provided with a connecting part connected to the piston rod, a shift fork limiting block is fixed on the connecting part, a ball head spring stud is installed on the gear shifting cylinder assembly, and the ball head spring stud can cooperate with the shift fork limiting block to position the gear.

[0007] Further, the upper end of the shifting fork limiting block is provided with a plurality of limiting grooves, and the ball head elastic stud can be clamped into the corresponding limiting groove to fix the position of the shifting fork.

[0008] Further, the connecting part is arranged on the pin shaft support along the movement, and the pin shaft support is fixed on the rear cover.

[0009] Further, the head end of the shifting fork is provided with a shift knob for driving the translation of the inner gear ring.

[0010] Further, the shift knob is fixedly installed on the shifting fork through a snap spring.

[0011] Further, the shift cylinder assembly comprises a cylinder body, a stepped air cavity is formed in the cylinder body, and the stepped air cavity comprises, from left to right, a left air chamber, a transition chamber and a right air chamber; a left piston is installed in the left air chamber, a sleeve cylinder piston is installed in the right air chamber, and a small piston is installed in the sleeve cylinder piston; the left piston and the small piston are respectively installed at two ends of a piston rod; the cylinder body is provided with an air inlet, and the air inlet is in communication with the left air chamber and the right air chamber; and the cylinder body is provided with an electromagnetic valve for controlling the left air chamber or the right air chamber to push the piston after air intake.

[0012] Further, the transition chamber is provided with a through hole in communication with the outside, and the connecting part is hinged to the piston rod after passing through the through hole.

[0013] Further, the cylinder body is provided with a gear position sensor, and the gear position sensor is connected with the piston rod.

[0014] Further, the end of the right air chamber is of an open structure and is provided with a shift cylinder cover.

[0015] The utility model discloses the beneficial effects of: reduce maintenance cost, improve the smoothness of gear shifting and the convenience of operation, speed up the response speed of gear shifting, and enhance the adaptability of the gear shifting mechanism system under different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the front view structural schematic diagram of the utility model.

[0017] Figure 2 It is the rear view structural schematic diagram of the utility model.

[0018] Figure 3 It is the structural schematic diagram of the shift cylinder assembly of the utility model.

[0019] Figure 4 It is the structural schematic diagram in the cylinder body of the utility model.

[0020] Figure 5Is the schematic diagram of the neutral gear state structure of the utility model.

[0021] Figure 6 Is the schematic diagram of the first gear state structure of the utility model.

[0022] Figure 7 Is the schematic diagram of the second gear state structure of the utility model.

[0023] In the figure: 1, gear cylinder assembly;2, shift fork;3, pin shaft support;4, gear shifting block;5, snap spring;6, shift fork limiting block;7, bolt;8, air inlet;9, electromagnetic valve;10, ball head elastic stud;11, gear position sensor;12, gear cylinder cover;13, cylinder body;14, sleeve cylinder piston;15, small piston;16, piston rod;17, left piston;18, left air chamber;19, transition chamber;20, through hole;21, right air chamber;22, rear cover;23, tooth cover;24, inner gear ring;25, inner gear ring support;26, connecting part. DETAILED DESCRIPTION

[0024] The utility model will be further described below in conjunction with specific embodiments, but will not limit the utility model to these specific embodiments. Those skilled in the art should realize that the utility model covers all alternatives, improvements and equivalents that can be included in the scope of claims.

[0025] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more, unless otherwise explicitly limited.

[0026] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0027] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] Referring to Figures 1-3 The embodiment provides a novel commercial vehicle gear shifting mechanism system, which comprises a gear shifting cylinder assembly 1 and a shift fork 2. The shift fork 2 is connected to the piston rod 16 of the gear shifting cylinder assembly 1 and is driven to move by the piston rod 16. The shift fork 2 is connected to the inner gear ring 24 driven to shift left and right. The shift fork 2 is provided with a connecting portion 26 connected to the piston rod 16. The connecting portion 26 is fixed with a shift fork limiting block 6. The gear shifting cylinder assembly 1 is provided with a ball head elastic stud 10. The ball head elastic stud 10 can cooperate with the shift fork limiting block 6 to position the gear. Specifically, the shift fork limiting block 6 is fixed on the connecting portion 26 by bolts 7. The upper end of the shift fork limiting block 6 is provided with a plurality of limiting grooves. The ball head elastic stud 10 can be clamped into the corresponding limiting groove to fix the position of the shift fork.

[0029] The connecting portion 26 in the embodiment is arranged on the pin shaft support 3 along the movement. The pin shaft support 3 is fixed on the rear cover 22. The utility model is guided by the pin shaft support 3 to accurately transmit the gear shifting force.

[0030] The head end of the shift fork 2 in the embodiment is provided with a gear shifting block 4 for driving the inner gear ring 24 to translate. The gear shifting block 4 is fixedly installed on the shift fork 2 by a snap spring 5.

[0031] The shift cylinder assembly 1 comprises a cylinder body 13, a stepped air cavity is formed in the cylinder body 13, the stepped air cavity comprises, from left to right, a left air chamber 18, a transition chamber 19 and a right air chamber 21; a left piston 17 is arranged in the left air chamber 18, a sleeve cylinder piston 14 is arranged in the right air chamber 21, a small piston 15 is arranged in the sleeve cylinder piston 14, and the left piston 17 and the small piston 15 are respectively arranged at two ends of a piston rod 16; the cylinder body 13 is provided with an air inlet 8, the air inlet 8 is respectively communicated with the left air chamber 18 and the right air chamber 21; the cylinder body 13 is provided with an electromagnetic valve 9 for controlling the left air chamber 18 or the right air chamber 21 to push the piston after air inlet; the transition chamber 19 is provided with a through hole 20 communicated with the outside, and a connecting part 26 is hinged with the piston rod 16 after penetrating through the through hole 20; the cylinder body 13 is provided with a gear position sensor 11, and the gear position sensor 11 is connected with the piston rod 16; an end of the right air chamber 21 is an open structure and is provided with a shift cylinder cover 12, and the shift cylinder cover 12 is sealingly connected with the cylinder body 13, so that the air tightness is guaranteed.

[0032] When the electromagnetic valve 9 receives a shift instruction during use, the flow direction of compressed gas is adjusted, so that the compressed gas enters a required air chamber and pushes the piston rod 16 to move, the movement of the piston rod 16 drives the shift fork 2 to slide, the shift force is accurately transmitted through the guidance of the pin shaft support 3, the shift block 4 is fixed with the shift fork 2, the movement of the shift block 4 makes the inner ring gear 24 slide in the axial direction, and the switching of the first gear and the second gear is realized. Figure 5 As shown in the figure, at this time, the inner ring gear 24 is located between the inner ring gear support 25 and the tooth cover 23. The inner ring gear 24 slides to the left and is combined with the inner ring gear support 25, as shown in the figure. Figure 6 The inner ring gear 24 slides to the right and is combined with the tooth cover 23, and the second gear is formed. After a shift behavior is completed, the ball head elastic stud 10 in the cylinder is clamped into the corresponding groove of the shift fork limiting block 6 connected with the shift fork 2, the position of the shift fork 2 is fixed, and the gear position is maintained.

[0033] The utility model discloses reduce maintenance cost, improve the smoothness of gear shifting and the convenience of operation, accelerate the response speed of gear shifting, and enhance the adaptability of the gear shifting mechanism system under different working conditions.

Claims

1. A new type of commercial vehicle shift mechanism system, comprising a shift cylinder assembly, a shift fork, the shift fork is connected to the piston rod of the shift cylinder assembly and is driven to move by the piston rod, the shift fork is connected with the inner gear ring driven by it to slide and shift rearward, characterized in that: The shifting fork is provided with a connecting part connected with the piston rod, the connecting part is fixed with a shifting fork limiting block, the gear shifting cylinder assembly is provided with a ball head elastic stud, and the ball head elastic stud can be matched with the shifting fork limiting block to block and position.

2. A novel commercial vehicle shift mechanism system as claimed in claim 1, wherein: The upper end of the shifting fork limiting block is provided with a plurality of limiting grooves, and the ball head elastic stud can be clamped into the corresponding limiting groove to fix the position of the shifting fork.

3. A novel commercial vehicle shift mechanism system as claimed in claim 1, wherein: The connecting part is arranged on a pin shaft support along the movement, and the pin shaft support is fixed on the rear cover.

4. A novel commercial vehicle shift mechanism system as claimed in claim 1, wherein: The head end of the shifting fork is provided with a gear shifting block for driving the inner gear ring to translate.

5. A novel commercial vehicle shift mechanism system as claimed in claim 4, wherein: The gear shifting block is fixedly installed on the shifting fork through a snap spring.

6. A novel commercial vehicle shift mechanism system as claimed in claim 1, wherein: The gear shifting cylinder assembly comprises a cylinder body, a stepped air cavity is formed in the cylinder body, and the stepped air cavity comprises, from left to right, a left air chamber, a transition chamber and a right air chamber. A left piston is installed in the left air chamber, a sleeve cylinder piston is installed in the right air chamber, and a small piston is installed in the sleeve cylinder piston.

7. A novel commercial vehicle shift mechanism system as claimed in claim 6, wherein: The left piston and the small piston are respectively installed at two ends of the piston rod.

8. A novel commercial vehicle shift mechanism system as claimed in claim 6 wherein: The cylinder body is provided with an air inlet, and the air inlet is respectively communicated with the left air chamber and the right air chamber.

9. A novel commercial vehicle shift mechanism system as claimed in claim 6 wherein: The cylinder body is provided with an electromagnetic valve for controlling the left air chamber or the right air chamber to push the piston after air inlet. The transition chamber is provided with a through hole communicated with the outside, and the connecting part is hinged with the piston rod after passing through the through hole. The cylinder body is provided with a gear position sensor, and the gear position sensor is connected with the piston rod. The end of the right air chamber is an open structure and is provided with a gear shifting cylinder cover.

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