Neutral gear state detection structure for auxiliary box of gearbox and gearbox with power takeoff

Abstract

The utility model discloses a gearbox auxiliary box neutral gear state detection structure and a gearbox with a power takeoff, a pressure switch assembly penetrates through an auxiliary box body, so that the pressure switch assembly and a shifting fork shaft are vertically distributed, the shifting fork shaft can move under the driving of a piston according to different gears, and the shifting fork shaft is driven by the piston to move in the moving process. When the shifting fork shaft moves to a specific position, the shifting fork shaft extrudes the pressure switch assembly, so that the pressure switch assembly is in an extruded or non-extruded state along with continuous movement of the shifting fork shaft, when the pressure switch assembly is extruded, the pressure switch assembly is in a disconnected state, when the pressure switch assembly is not extruded, the pressure switch assembly is in a power-on state, and the outside can pass through the pressure switch assembly. The current gear state is judged according to the preset position of the shifting fork shaft, the gear state of the auxiliary box is accurately detected, the position of the piston of the auxiliary box is accurately reflected, whether the auxiliary box is in the neutral gear state or not is judged, and operation risks are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, and relates to a gearbox auxiliary box neutral state detection structure and a gearbox with a power take-off. Background Art

[0002] Cranes have relatively special working conditions. When the crane lifting arm is working, if there is output from the main box, there will be greater risks, especially with the emergence of new plug-in cranes on the market. Under special working conditions, when it is impossible to plug in and the battery is exhausted, it is necessary to switch the power source of the vehicle to the gearbox power take-off, which is more risky. This requires a secondary box middle position detection structure to accurately judge the status of the secondary box. However, the traditional gearbox with power take-off on the market cannot detect the neutral position. This makes it impossible for the staff to grasp the status of the secondary box in time when the crane is working, and unable to discover the existing safety hazards in time. Utility Model Content

[0003] The purpose of the utility model is to solve the problem in the prior art that when a crane is working, the auxiliary box state cannot be accurately judged, and further the existing operating risks and hidden dangers cannot be discovered, and a gearbox auxiliary box neutral state detection structure and a gearbox with a power take-off are provided.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A gearbox auxiliary case neutral state detection structure comprises an auxiliary case body, a shift fork shaft is arranged in the auxiliary case body, and a piston is arranged on the shift fork shaft;

[0006] The pressure switch assembly passes through the auxiliary box body, and the pressure switch assembly is vertically distributed with the fork shaft. The lower end of the pressure switch assembly is against the fork shaft. When the piston drives the fork shaft to move, the fork shaft can squeeze the pressure switch assembly, so that the pressure switch assembly is in a disconnected or energized state.

[0007] The further improvement of the utility model is:

[0008] The shift fork shaft is provided with a groove, and when the shift fork shaft moves, the end of the pressure switch assembly can extend into the groove.

[0009] The pressure switch assembly comprises a pressure switch, the lower end of which is connected to a neutral switch pin;

[0010] The pressure switch is located outside the auxiliary box body, and the neutral switch pin is located inside the auxiliary box body.

[0011] A rear cover shell is arranged on the auxiliary box body.

[0012] The pressure switch is threadedly connected to the rear cover housing.

[0013] The pressure switch and the neutral switch pin are in abutment with each other.

[0014] The model of the pressure switch is 0069GS-1.

[0015] A gearbox with a power take-off comprises the gearbox auxiliary box neutral state detection structure described in the utility model.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a neutral state detection structure for a transmission auxiliary case, wherein a pressure switch component is passed through the auxiliary case body so that the pressure switch component and the shift fork shaft are vertically distributed, and the shift fork shaft moves under the drive of a piston according to different gear positions, and during the movement, the shift fork shaft squeezes the pressure switch component after reaching a specific position, so that as the shift fork shaft keeps moving, the pressure switch component will be in a squeezed or non-squeezed state, and when squeezed, the pressure switch component is disconnected, and when not squeezed, the pressure switch component is energized, and the outside world can judge the current gear state through the state of the pressure switch component combined with the preset position of the shift fork shaft, and the auxiliary case gear state detection is accurate, and the auxiliary case piston position is accurately reflected, so as to judge whether the auxiliary case is in a neutral state and avoid operation risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the auxiliary box neutral state of the utility model;

[0020] Figure 2 This is a schematic diagram of the auxiliary box high gear state of the utility model;

[0021] Figure 3 It is a schematic diagram of the auxiliary box low gear state of the utility model.

[0022] Among them: 1-shift fork shaft; 2-neutral switch pin; 3-pressure switch; 4-rear cover housing; 5-; 6-piston. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] The utility model is further described in detail below with reference to the accompanying drawings:

[0030] See also Figure 1 The utility model discloses a transmission auxiliary box neutral state detection structure, which is a mechanical trigger structure, mainly used to judge whether the auxiliary box is in a neutral state by observing the state of a pressure switch, and specifically includes the following structures:

[0031] The present embodiment discloses a neutral state detection structure for a transmission auxiliary case, comprising an auxiliary case body, wherein a shift fork shaft 1 is arranged in the auxiliary case body, and a piston 6 is arranged on the shift fork shaft 1; a pressure switch assembly passes through the auxiliary case body, and the pressure switch assembly is vertically distributed with the shift fork shaft 1, and the lower end of the pressure switch assembly abuts against the shift fork shaft 1. When the piston 6 drives the shift fork shaft 1 to move, the shift fork shaft 1 can squeeze the pressure switch assembly, so that the pressure switch assembly is in a disconnected or energized state.

[0032] Furthermore, in this embodiment, a groove is provided on the fork shaft 1, and the groove is used to correspond to the pressure switch assembly. When the lower end of the pressure switch assembly extends into the groove, the fork shaft 1 will not cause extrusion to the pressure switch assembly. At this time, the pressure switch assembly is in a disconnected state.

[0033] When the lower end of the pressure switch assembly is offset from the groove, the fork shaft 1 squeezes the pressure switch assembly, and the pressure switch assembly is now in an energized state.

[0034] Furthermore, in this embodiment, the structure of the pressure switch assembly is:

[0035] The pressure switch assembly includes a pressure switch 3. A rear cover shell 4 is installed on the auxiliary box body. A mounting hole is opened on the rear cover shell 4. The mounting hole is a threaded hole. The pressure switch 3 is fixed in the threaded hole through a threaded connection. A neutral switch pin 2 is set at the lower end of the pressure switch 3. The neutral switch pin 2 is used to cooperate with the fork shaft 1. The fork shaft 1 applies force to the neutral switch pin 2. The neutral switch pin 2 moves upward to squeeze the contacts in the pressure switch 3, and the pressure switch 3 is turned on.

[0036] Furthermore, in this embodiment, the neutral switch pin 2 and the pressure switch 3 are assembled by abutting against each other.

[0037] Furthermore, in this embodiment, the model of the pressure switch 3 is 0069GS-1.

[0038] Furthermore, in this embodiment, a range stop cylinder is also provided on the shift fork shaft 1 .

[0039] The working principle of this embodiment is:

[0040] See also Figure 1When the cylinder in the middle position is ventilated and the low gear is ventilated, the piston is in the middle position, driving the fork shaft 1 to move, causing the neutral switch pin 2 to fall. At this time, the contact of the pressure switch 3 is in a fully extended state, and the pressure switch 3 is disconnected.

[0041] See also Figure 2 When the cylinder is not ventilated in the middle position, the groove of the fork shaft 1 is offset from the neutral switch pin 2, and the neutral switch pin 2 is located on the side of the groove close to the piston 6. At this time, the piston 6 is against the side wall of the piston chamber close to the groove, and the auxiliary box is in a high gear state. At this time, the contacts of the pressure switch 3 are squeezed and the pressure switch 3 is turned on.

[0042] See also Figure 3 When the cylinder is not ventilated in the middle position, the groove of the fork shaft 1 is offset from the neutral switch pin 2, and the neutral switch pin 2 is located on the side of the groove away from the piston 6. At this time, the piston 6 is against the side wall of the piston chamber away from the groove, and the auxiliary box is in a low gear state. At this time, the contacts of the pressure switch 3 are squeezed and the pressure switch 3 is turned on.

[0043] The utility model also discloses a gearbox with a power take-off, comprising the gearbox auxiliary box neutral state detection structure described in this embodiment.

[0044] The utility model also discloses a transmission auxiliary box neutral state detection structure, which aims to determine the middle position of the auxiliary box. Through the state of the pressure switch, the auxiliary box piston position can be accurately reflected, and whether the auxiliary box is in the neutral state can be judged accurately.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gearbox auxiliary box neutral state detection structure, characterized in that: It comprises an auxiliary box body, a shift fork shaft (1) is arranged in the auxiliary box body, and a piston (6) is arranged on the shift fork shaft (1); The pressure switch assembly passes through the auxiliary box body. The pressure switch assembly is vertically distributed with the fork shaft (1). The lower end of the pressure switch assembly abuts against the fork shaft (1). When the piston (6) drives the fork shaft (1) to move, the fork shaft (1) can squeeze the pressure switch assembly, so that the pressure switch assembly is in a disconnected or powered state.

2. A transmission auxiliary box neutral state detection structure according to claim 1, characterized in that: The shift fork shaft (1) is provided with a groove, and when the shift fork shaft (1) moves, the end of the pressure switch assembly can extend into the groove.

3. A transmission auxiliary box neutral state detection structure according to claim 2, characterized in that: The pressure switch assembly comprises a pressure switch (3), the lower end of the pressure switch (3) being connected to a neutral switch pin (2); The pressure switch (3) is located outside the auxiliary box body, and the neutral switch pin (2) is located inside the auxiliary box body.

4. A transmission auxiliary box neutral state detection structure according to claim 3, characterized in that: A rear cover shell (4) is arranged on the auxiliary box body.

5. A transmission auxiliary box neutral state detection structure according to claim 4, characterized in that: The pressure switch (3) is threadedly connected to the rear cover housing (4).

6. A transmission auxiliary box neutral state detection structure according to claim 3, characterized in that: The pressure switch (3) is in abutment with the neutral switch pin (2).

7. A transmission auxiliary box neutral state detection structure according to claim 3, characterized in that: The model of the pressure switch (3) is 0069GS-1.

8. A gearbox with a power take-off, characterized in that: It comprises the transmission auxiliary box neutral state detection structure as described in any one of claims 1-7.

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