An indicator light switch mechanism for a transfer case hydraulic-pneumatic shifting mechanism

Abstract

This utility model discloses an indicator light switch mechanism for a transfer case hydraulic shifting mechanism, including a trigger switch mounted on the axial slide of the shift fork lever and a triggering part mounted on the shift fork lever. The trigger switch has a trigger element; the triggering part only pushes the trigger element of the trigger switch to close the trigger switch when the shift fork lever is pushed into position. When the shift fork lever retracts and disengages from a certain gear, the trigger switch opens. Its advantage is that the indicator light only illuminates after the shift fork shaft is fully pushed into position and the shift is truly successful. Compared with existing technologies that rely on pneumatic or hydraulic sensors to illuminate the indicator light before or ultimately unsuccessfully shifting gears, thus creating a false alarm, this mechanism avoids the operator continuing to perform invalid operations when the shift is unsuccessful.

Description

Technical Field

[0001] This utility model relates to an indicator light switch mechanism for a transfer case hydraulic-pneumatic shifting mechanism, belonging to the field of power distribution technology. Background Technology

[0002] For multi-axis output mechanical equipment, a transfer case is provided to provide power to specific actuators. This transfer case needs a shifting mechanism that adapts to speed changes. Currently, with the emergence of a new type of large-scale engineering machinery, its functions are becoming increasingly diverse, and the number of actuators is also increasing. The transfer case used for each actuator must ensure successful gear shifting during operation. To confirm successful gear shifting, existing technology uses sensors installed on the pneumatic or hydraulic lines that drive the shift fork shaft. When there is a change in pneumatic or hydraulic pressure, an indicator light illuminates. However, this often results in false alarms because when the hydraulic or pneumatic device is activated to perform a gear shift, the indicator light may already be on before the shift fork shaft has been fully advanced or even before it has been fully advanced. This can mislead the driver or operator into continuing with subsequent invalid operations. Utility Model Content

[0003] The technical problem this invention aims to solve is: how to accurately confirm a successful gear shift.

[0004] To address the above problems, the technical solution proposed by this utility model is as follows:

[0005] An indicator light switch mechanism for a transfer case hydraulic shifting mechanism includes a trigger switch on the axial slide of a shift fork and a trigger part on the shift fork. The trigger switch has a trigger element. The trigger part will push the trigger element of the trigger switch to close the trigger switch only when the shift fork is pushed into place. When the shift fork is retracted and a certain gear is disengaged, the trigger switch will open.

[0006] The trigger element of the trigger switch is a trigger rod that is automatically extended by a spring and installed on the trigger switch. When the trigger rod is compressed by an external force and retracted to the set position, the trigger switch closes and the indicator light illuminates.

[0007] A mounting hole is provided at the tail of the axial slide rail. The trigger switch is installed in the mounting hole. The outer end of the trigger rod of the trigger switch is located inside the axial slide rail and can contact the sliding shift fork rod and receive the external force applied by the shift fork rod.

[0008] The mounting hole is located on the top wall of the axial slide, and the trigger rod is suspended inside the axial slide.

[0009] The trigger part on the shift fork is an obliquely upward guide surface located at the end of the shift fork. When the shift fork is pushed inward, the guide surface can contact the outer end of the trigger rod, forcing the trigger rod to slide upward along the guide surface until the trigger switch is closed.

[0010] The bottom surface of the trigger rod is a tapered surface that mates with the guide surface.

[0011] The trigger switch is installed at the end of the slide rail, and the trigger rod is axially and horizontally facing the shift fork rod, so that the end of the shift fork rod can directly push the trigger rod into the trigger switch.

[0012] Beneficial effect: The indicator light will only illuminate after the shift fork shaft has been pushed into place and the shift has been successfully completed. Compared with the existing technology that relies on pneumatic or hydraulic sensors to illuminate the indicator light before the shift has been completed or has ultimately failed, thus creating a false alarm, this technology can prevent the operator from continuing to make invalid operations when the shift has failed. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the transfer case described in Embodiment 1;

[0014] Figure 2 This is a cross-sectional schematic diagram of the transfer case described in Embodiment 2.

[0015] In the diagram: 1. Shift fork lever; 101. Guide surface; 2. Trigger switch; 201. Trigger rod; 2011. Conical surface; 3. Slide rail; 301. Mounting hole. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings: Example 1

[0017] like Figure 1 As shown, an indicator light switch mechanism for a transfer case hydraulic-pneumatic shifting mechanism includes a trigger switch 2 mounted on an axial slide rail 3 of a shift fork 1 and a triggering part mounted on the shift fork 1. The trigger switch 2 has a trigger element; the triggering part only pushes the triggering element of the trigger switch 2 to close the trigger switch 2 when the shift fork 1 is pushed into position. When the shift fork 1 retracts and disengages from a certain gear, the trigger switch 2 opens. Thus, when the indicator light illuminates, it indicates that the shift fork 1 has been pushed into position and the hydraulic or pneumatic shifting mechanism has successfully shifted gears, avoiding the false alarm of the indicator light illuminating even if the shifting is unsuccessful.

[0018] The hydraulic-pneumatic shifting mechanism mentioned here refers to a hydraulic or pneumatic shifting mechanism.

[0019] The trigger element of the trigger switch 2 is a trigger rod 201 that is automatically extended by a spring (not shown in the figure) mounted on the trigger switch 2. When the trigger rod 201 is compressed by an external force and retracted back to the set position, the trigger switch 2 closes and the indicator light illuminates.

[0020] A mounting hole 301 is provided at the tail of the axial slide rail 3. The trigger switch 2 is installed in the mounting hole 301. The outer end of the trigger rod 201 of the trigger switch 2 is located in the axial slide rail 3, and can contact the sliding shift fork rod 1 and receive the external force applied by the shift fork rod 1.

[0021] Mounting hole 301 is located on the upper top wall of axial slide rail 3, and trigger rod 201 is suspended inside axial slide rail 3. This position does not interfere with other settings.

[0022] The trigger part on the shift fork 1 is an obliquely upward guide surface 101 located at the end of the shift fork 1. When the shift fork 1 is pushed inward, the guide surface 101 can contact the outer end of the trigger rod 201, forcing the trigger rod 201 to slide upward along the guide surface 101 until the trigger switch is closed.

[0023] The bottom surface of the trigger lever 201 is a tapered surface 2011 that mates with the guide surface 101, which reduces the pushing resistance of the shift fork lever 1. Example 2

[0024] like Figure 2 As shown: The difference between this and Embodiment 1 is that the trigger switch 2 is installed at the end of the slide rail 3, and the trigger rod 201 is coaxially and horizontally oriented towards the shift fork rod, so that the end of the shift fork rod 1 can directly push the trigger rod 201 into the trigger switch 2 to close the trigger switch 2, thereby illuminating the indicator light.

[0025] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. An indicator light switch mechanism for a transfer case hydraulic-pneumatic shifting mechanism, characterized in that: It includes a trigger switch (2) on the axial slide (3) of the shift fork (1) and a trigger part on the shift fork (1). The trigger switch (2) has a trigger element. Only when the shift fork (1) is pushed into place will the trigger part push the trigger element of the trigger switch (2) to close the trigger switch (2). When the shift fork (1) is retracted and a certain gear is disengaged, the trigger switch (2) is opened.

2. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 1, characterized in that: The trigger element of the trigger switch (2) is a trigger rod (201) that is automatically extended by a spring and installed on the trigger switch (2). When the trigger rod (201) is compressed by an external force and retracted to the set position, the trigger switch (2) closes and the indicator light illuminates.

3. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 2, characterized in that: A mounting hole (301) is provided at the tail of the axial slide (3). The trigger switch (2) is installed in the mounting hole (301). The outer end of the trigger rod (201) of the trigger switch (2) is located in the axial slide (3) and can contact the sliding shift fork (1) and receive the external force applied by the shift fork (1).

4. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 3, characterized in that: The mounting hole (301) is located on the upper top wall of the axial slide (3), and the trigger rod (201) is suspended inside the axial slide (3).

5. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 4, characterized in that: The trigger part on the shift fork (1) is an obliquely upward guide surface (101) located at the end of the shift fork (1). When the shift fork (1) is pushed inward, the guide surface (101) can contact the outer end of the trigger rod (201), forcing the trigger rod (201) to slide upward along the guide surface (101) until the trigger switch is closed.

6. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 5, characterized in that: The bottom surface of the trigger rod (201) is a tapered surface (2011) that mates with the guide surface (101).

7. The indicator light switch mechanism for the transfer case hydraulic-pneumatic shifting mechanism according to claim 3, characterized in that: The trigger switch (2) is installed at the end of the slide rail (3), and the trigger rod (201) is axially and horizontally facing the shift fork rod, so that the end of the shift fork rod (1) can directly push the trigger rod (201) into the trigger switch (2).

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