Disconnecting device for engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a disengaging device for engineering machinery, which comprises a transfer case shell, a driving shaft, a driving gear and a driven gear. A driving shaft is arranged in the transfer case shell, a driving gear is arranged on the driving shaft in a sleeved mode, a plurality of driven gears are arranged in the transfer case shell, the transfer case further comprises a disengaging mechanism, and the disengaging mechanism is arranged on the outer side of the transfer case shell. The disengagement device solves the problems that when an existing disengagement device changes power transmission, an operator cannot accurately judge the current rotating speed, teeth are likely to be broken to damage a transfer case due to the fact that the rotating speed is too high in the dynamic meshing process, and the efficiency of the power transmission change is low, and achieves the purpose that when the disengagement device changes the power transmission, the operator cannot accurately judge the current rotating speed. An operator can accurately judge the current rotating speed, the change of power transmission is quickly realized in the dynamic meshing process, the transfer case is prevented from being damaged by tooth beating, and the power transmission change efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field, especially a kind of disconnecting device for engineering machinery. BACKGROUND

[0002] Engineering machinery prior art transmission clutch way mainly has gear meshing mode and clutch mode, and in the transmission of gear meshing mode, it needs to be meshed by manual operation gear, and operator cannot accurately determine the current speed when operating, and in dynamic meshing process, it is easy to cause gear damage to transfer case due to excessively high speed, and there is only a very small probability to realize manual operation gear meshing when no speed.

[0003] In prior art, such as Chinese patent, application number: 201310496385.0, publication date: 2014.01.08, a kind of crane and its engine power system are disclosed, and the engine power system includes the transmission of engine, and transfer case;The transmission includes fixed flywheel, engine output shaft, and the transfer case includes transfer case input shaft that can rotate with the transmission;Engine power system further includes disconnecting device and control device, and the control device controls the disconnecting device to be in first / second working position, to make the disconnecting device connect / disconnect the transfer case input shaft and the transmission.The transmission of engine is disconnected with transfer case input shaft by disconnecting device and control device, then transfer case and hydraulic system connected with transfer case are disconnected with engine, so as to eliminate the load resistance when engine starts.

[0004] However, operator needs to disconnect the transmission of engine with transfer case input shaft by disconnecting device and control device after transfer case input / output gear almost stops rotating, which reduces the efficiency of power transmission change.

[0005] Therefore, the utility model provides a kind of disconnecting device for engineering machinery. UTILITY MODEL CONTENT

[0006] The utility model discloses a kind of disconnecting device for engineering machinery, solve the disconnecting device of existing when power transmission changes, operator cannot accurately determine the current speed, in the implementation dynamic meshing process, it is easy to cause gear damage to transfer case due to excessively high speed, and the efficiency of power transmission change is relatively low, when the disconnecting device is implemented in power transmission change, operator can accurately determine the current speed, in the implementation dynamic meshing process, power transmission change is quickly realized, avoid gear damage to transfer case, greatly improve the efficiency of power transmission change.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] The application discloses a disconnecting device for engineering machinery, which comprises a transfer case shell, a driving shaft, a driving gear and a driven gear.

[0009] The disconnecting device is arranged outside the transfer case shell, and centrifugal force generated by rotation of the driving shaft changes the transmission direction of power of the driving shaft.

[0010] Preferably, the disconnecting device comprises a shell cover, a disconnecting gear, a disconnecting shaft, a push-pull rod, a movable pin shaft and a tension spring.

[0011] Preferably, a circular groove is formed axially on the driving shaft, a through hole is formed radially on the driving shaft, the circular groove and the through hole are mutually penetrated, the disconnecting shaft is slidably arranged in the circular groove, a bolt is radially arranged on the disconnecting shaft, and the bolt is connected with the disconnecting gear through the through hole.

[0012] Preferably, the push-pull rod is connected with the disconnecting shaft away from the driving shaft through a rotating bearing, and an end of the push-pull rod away from the disconnecting shaft is arranged outside the shell cover.

[0013] Preferably, the maximum axial moving distance of the disconnecting shaft in the circular groove is L1, the maximum distance between the disconnecting gear and the driving gear is L2, and L1 is equal to L2.

[0014] Preferably, an angular velocity sensor is arranged in the shell cover.

[0015] The application has the following beneficial effects:

[0016] 1. The disconnecting device is arranged on the transfer case shell, the driving shaft in the transfer case shell and the disconnecting shaft on the disconnecting device are cooperated with each other, centrifugal force generated by rotation of the driving shaft makes the movable pin shaft extend and contract, thereby controlling the movement of the disconnecting shaft and changing power transmission, and the application avoids gear tooth damage of the transfer case in the process of dynamic engagement and improves the efficiency of power transmission change.

[0017] 2, the utility model discloses a cover can be inside be equipped with angular velocity sensor, angular velocity sensor detects the rotation speed of driving shaft, and operator can accurately judge current rotation speed, realizes the change of power transmission in the implementation dynamic engagement process quickly, avoids the tooth damage transfer case, improves the efficiency of power transmission change greatly, realizes transfer case safe, fast transmission clutch. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole schematic diagram of the utility model.

[0019] Figure 2 It is the utility model Figure 1 The enlarged schematic diagram of A place.

[0020] Figure 3 It is the schematic diagram of the utility model movable pin shaft extension state.

[0021] Figure 4 It is the schematic diagram of the utility model driving gear and disengagement gear engagement state.

[0022] In the drawing: 1, transfer case housing;2, driving shaft;21, circular recess;22, through-hole;3, driving gear;4, driven gear;5, disengagement mechanism;51, shell cover;52, disengagement gear;53, disengagement shaft;54, push-pull rod;55, movable pin shaft;56, tension spring;57, bolt;58, rotating bearing. DETAILED DESCRIPTION

[0023] The use method of the utility model is further explained below in combination with the drawings and specific embodiments.

[0024] As Figures 1 to 4 Indicated, a kind of disengagement device for engineering machinery, comprising: transfer case housing 1, driving shaft 2, driving gear 3 and driven gear 4;The transfer case housing 1 inside is provided with driving shaft 2, the driving shaft 2 is equipped with driving gear 3, and the transfer case housing 1 inside is provided with multiple driven gears 4, and multiple driven gears 4 are respectively engaged with driving gear 3 each other;

[0025] Further comprising disengagement mechanism 5, the disengagement mechanism 5 is arranged on the outside of transfer case housing 1, and the disengagement mechanism 5 changes the transmission direction of driving shaft 2 power by centrifugal force generated by the rotation of driving shaft 2.

[0026] The disengagement mechanism 5 includes: a cover 51, a disengagement gear 52, a disengagement shaft 53, a push-pull rod 54, a movable pin 55, and a tension spring 56; the cover 51 is disposed on the transfer case housing 1, the disengagement gear 52 is slidably disposed on the drive shaft 2, one end of the disengagement shaft 53 is slidably disposed on the drive shaft 2, and the disengagement shaft 53 is coaxial with the drive shaft 2, the other end of the disengagement shaft 53 is provided with a push-pull rod 54, the disengagement shaft 53 is radially disposed with a tension spring 56, the tension spring 56 is provided with a movable pin 55, and the tension spring 56 and the movable pin 55 are located inside the disengagement shaft 53.

[0027] By utilizing the centrifugal force generated by the rotation of the drive shaft 2, the movement of the movable pin 55 is controlled, thereby ensuring that the disengagement gear 52 can mesh with the drive gear 3 at the optimal speed. The centrifugal force generated by the rotation of the drive shaft 2, the gravity of the movable pin 55, and the elastic force of the tension spring 56 are matched and calculated so that when the drive shaft 2 reaches the optimal meshing speed, the movable pin 55 is located inside the disengagement shaft 53, and the elastic potential energy of the tension spring 56 is greater than the centrifugal force generated by the rotating shaft. When the speed is too high, the elastic potential energy of the tension spring 56 is less than the centrifugal force generated by the rotating shaft, and the movable pin 55 will extend outwards, preventing the disengagement gear 52 from meshing with the drive gear 3. This avoids the risk of gear breakage and damage to the transfer case due to excessive speed during dynamic meshing.

[0028] The drive shaft 2 has an axially formed circular groove 21 and a radially formed through hole 22. The circular groove 21 and the through hole 22 are interconnected. The disengagement shaft 53 is slidably located inside the circular groove 21. A bolt 57 is radially arranged on the disengagement shaft 53, and both ends of the bolt 57 pass through the through hole 22 and are connected to the disengagement gear 52.

[0029] The circular groove 21 and through hole 22 on the drive shaft 2 allow the disengagement shaft 53 to slide within the circular groove 21 on the drive shaft 2, thereby driving the disengagement gear 52 to mesh with the drive gear 3. Through the connection of the bolt 57, the power of the drive shaft 2 is transmitted to the disengagement shaft 53 to drive the disengagement gear 52 to rotate.

[0030] The push-pull rod 54 is connected to the end of the disengagement shaft 53 away from the drive shaft 2 via a rotating bearing 58, and the end of the push-pull rod 54 away from the disengagement shaft 53 is located on the outside of the cover 51.

[0031] By pushing or pulling the push-pull rod 54, the disengagement gear 52 and the driving gear 3 can be engaged or disengaged, thus ensuring the change of power transmission. It should be noted that the push-pull rod 54 can be manually pulled or automatically driven by an electro-hydraulic system and corresponding control program, thereby achieving self-sensing, self-analysis, and self-judgment to complete the clutch action of power transmission.

[0032] The maximum axial movement distance of the disengagement shaft 53 within the circular groove 21 is L1, and the maximum distance between the disengagement gear 52 and the drive gear 3 is L2, with L1 equal to L2. This is to ensure that the disengagement shaft 53 can drive the disengagement gear 52 to mesh with the drive gear 3, thereby ensuring effective power transmission.

[0033] An angular velocity sensor is installed inside the housing 51. The angular velocity sensor detects the real-time engine speed, allowing the operator to observe whether the speed is below the critical speed. This, in turn, pushes the push-pull rod 54, which causes the disengagement shaft 53 to move axially on the drive shaft 2. The disengagement shaft 53 then moves the bolt 57 and the disengagement gear 52 a certain distance in the through hole 22 of the drive shaft 2, causing the drive gear 3 and the disengagement gear 52 to mesh with each other, thereby changing the power transmission.

[0034] Working process: When it is necessary to reconnect the power transmission between the engine and the pump set, the engine needs to be briefly ignited and then shut off. The drive shaft 2 inside the transfer case housing 1 is always rotating, which drives the disengagement shaft 53 connected to the drive shaft 2 to rotate. Due to the high rotation speed of the drive shaft 2, during the rotation, the movable pin 55 on the disengagement shaft 53 will move radially outward by centrifugal force, which will stretch the tension spring 56. At this time, when changing the power transmission, the operator pulls the push-pull rod 54, which drives the disengagement shaft 53 to move axially inward. However, due to the extension of the movable pin 55, the disengagement shaft 53 cannot move, and the disengagement gear 52 cannot mesh with the drive gear 3, so the power transmission cannot be changed.

[0035] The rotational speed of the drive shaft 2 can be detected by the angular velocity sensor. When the rotational speed of the drive shaft 2 is reduced to below the highest critical speed calculated based on the weight of the movable pin 55 and the elastic tension of the tension spring 56 (this speed is set as the highest permissible speed for dynamic meshing between the disengagement gear 52 and the drive gear 3, i.e., without the risk of gear breakage), due to the elastic potential energy of the tension spring 56, the movable pin 55 on the disengagement shaft 53 will be pulled back into the disengagement shaft 53. At this time, the operator can push the push-pull rod 54 to drive the disengagement shaft 53 to move axially on the drive shaft 2. The disengagement shaft 53 will also drive the bolt 57 and the disengagement gear 52 to move a certain distance on the through hole 22 of the drive shaft 2, so that the drive gear 3 and the disengagement gear 52 mesh with each other, thereby realizing the power transmission between the engine and the drive gear 3 in the transfer case, and then realizing the power connection between the engine and the pump group with the always meshed driven gear 4.

[0036] For the engine and pump set transmission cut-off operation, the power can be cut off by simply pulling the push-pull rod 54 to the designated position when the engine stops running. When the drive shaft 2 has no speed, the movable pin 55 is always inside the disengaged shaft 53 under the elastic potential energy of the tension spring 56.

[0037] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A disengagement device for a working machine, comprising: The application relates to a split gearbox shell (1), a driving shaft (2), a driving gear (3) and a driven gear (4); the split gearbox shell (1) is internally provided with the driving shaft (2), the driving shaft (2) is sleeved with the driving gear (3), the split gearbox shell (1) is internally provided with a plurality of driven gears (4), and the plurality of driven gears (4) are respectively engaged with the driving gear (3). The application further comprises a disengaging mechanism (5) arranged on the outside of the split gearbox shell (1), and the disengaging mechanism (5) changes the power transmission direction of the driving shaft (2) through centrifugal force generated by the rotation of the driving shaft (2).

2. A disengagement device for a working machine according to claim 1, characterized in that The disengaging mechanism (5) comprises a shell cover (51), a disengaging gear (52), a disengaging shaft (53), a push-pull rod (54), a movable pin shaft (55) and a tension spring (56); the shell cover (51) is arranged on the split gearbox shell (1), the disengaging gear (52) is slidably arranged on the driving shaft (2), one end of the disengaging shaft (53) is slidably arranged on the driving shaft (2), the disengaging shaft (53) is coaxial with the driving shaft (2), the push-pull rod (54) is arranged on the other end of the disengaging shaft (53), the tension spring (56) is arranged on the disengaging shaft (53) in the radial direction, the movable pin shaft (55) is arranged on the tension spring (56), and the tension spring (56) and the movable pin shaft (55) are located in the disengaging shaft (53).

3. A disengagement device for a working machine according to claim 2, characterized in that: A circular groove (21) is axially arranged on the driving shaft (2), a through hole (22) is radially arranged on the driving shaft (2), the circular groove (21) and the through hole (22) are mutually penetrated, the disengaging shaft (53) is slidably arranged in the circular groove (21), and a bolt (57) is radially arranged on the disengaging shaft (53), and the two ends of the bolt (57) respectively pass through the through hole (22) and are connected with the disengaging gear (52).

4. A disengagement device for a working machine according to claim 2, characterized in that: The push-pull rod (54) is connected with the end of the disengaging shaft (53) away from the driving shaft (2) through a rotating bearing (58), and the end of the push-pull rod (54) away from the disengaging shaft (53) is located on the outside of the shell cover (51).

5. A disengagement device for a working machine according to claim 3, characterized in that: The maximum axial movement distance of the disengaging shaft (53) in the circular groove (21) is L1, the maximum distance between the disengaging gear (52) and the driving gear (3) is L2, and L1 is equal to L2.

6. A disengagement device for a working machine according to claim 2, characterized in that: An angular velocity sensor is arranged in the shell cover (51).

Images