A gear locking transmission mechanism for an excavator gearbox

Abstract

The invention discloses a gear locking transmission mechanism for an excavator gearbox, and relates to the technical field of gearboxes, including a gearbox; a locking mechanism is arranged at the left end of a relay shaft on the front side of the gearbox, and an adsorption component is arranged to realize multi-tooth meshing transmission of a gear and a gear ring, so that a large torque during locking is shared, thereby reducing the strength requirements of the gear and the gear ring, and also increasing the service life of the gear and the gear ring; a groove on the surface of a coil ring and permanent magnetic particles inside the groove are arranged to achieve an improved friction effect between the coil ring and the cast iron ring, thereby improving the locking instantaneous stop effect; a flow guide component is arranged to utilize hydraulic pressure to switch the locking and unlocking states between a first slot shaft and a gear, so as to avoid friction and wear of an electromagnetic adsorption component during an unlocking process.

Description

Technical Field

[0001] The invention relates to the technical field of gearboxes, and in particular to a gear locking transmission mechanism for an excavator gearbox. Background Art

[0002] The excavator gearbox is a mechanism used by the excavator to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or shifted manner. The transmission includes multiple planetary gear sets, multiple meshing gears and shifting elements, etc. Different speed outputs can be flexibly obtained by engaging or disengaging different shifting elements (for example, clutches or brakes, etc.).

[0003] Most of the existing locking mechanism transmission actions rely solely on the meshing of a few teeth on one side of the gear to slow down and lock. Since the locking process needs to bear a large torque and impact force, the teeth are prone to wear and deformation, which affects the service life of the gear. High-quality gears are required, which increases production costs. Most of the existing transmission gears are locked by electromagnetic adsorption. This method is fast and accurate, but it is prone to friction between the electromagnetic adsorption parts, which reduces the electromagnetic adsorption effect. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a gear locking transmission mechanism for an excavator gearbox.

[0005] The present invention is implemented by constructing a gear locking transmission mechanism for an excavator gearbox, the device comprising a gearbox; a locking mechanism is provided at the left end of a relay shaft on the front side of the gearbox;

[0006] The locking mechanism includes a transmission shaft fixedly connected to the left end of the relay shaft on the front side of the gearbox; a first slot shaft is welded and fixed to the left end of the transmission shaft, and an arc groove is provided on the outer ring surface of the first slot shaft; a second slot shaft is welded and fixed to the left end of the first slot shaft, and a circular groove is provided at the center of the left end face of the second slot shaft; an absolute value feedback device is plugged and fixed to the circular groove at the left end of the second slot shaft; an adsorption assembly is provided on the outside of the first slot shaft; a guide assembly is rotatably provided on the left end of the adsorption assembly.

[0007] Preferably, the adsorption assembly includes an articulated frame fixedly mounted on the left side of the gearbox housing by bolts; a coil ring is mounted on the inner side of the articulated frame by bolts; and a cast iron ring is rotatably arranged on the inner ring side of the coil ring.

[0008] Preferably, the cast iron ring is fixedly mounted on the outer ring side of the gear ring; and a retaining piece is provided for meshing transmission on the inner ring wall of the gear ring.

[0009] Preferably, the retaining member comprises a gear meshingly arranged at the inner teeth of the gear ring; and an empty ring is welded and fixed at the center through hole of the gear.

[0010] Preferably, an oil groove with a flow-guiding function is provided inside the hollow ring; the inner ring wall of the hollow ring is provided with ten groups of open grooves distributed in an annular shape, and bumps are slidably provided on the inner walls of the open grooves.

[0011] Preferably, the guide assembly includes a grooved ring rotatably arranged on the outer ring side of the empty ring; a compression ring with a compression limiting function is fixedly installed at the front end of the grooved ring by bolts; and a gasket is rotatably contacted at the rear end of the grooved ring.

[0012] Preferably, a sealing ring is rotatably provided on the inner groove wall of the grooved ring; and a pressure valve is threadedly installed on the top screw groove of the grooved ring.

[0013] Preferably, a magnetic coupling is provided at the connection between the right end of the transmission shaft and the gearbox relay shaft, and a current output controller is fixedly installed on the top side of the left end of the articulated frame by bolts, and the current output controller is respectively connected in series with the magnetic coupling and the coil ring at the right end of the transmission shaft.

[0014] Preferably, the outer surface of the cast iron shell of the coil ring is provided with a groove, and permanent magnetic particles are slidably arranged inside the groove, and the outer surface of the cast iron ring shell is provided with rough protrusions that match the permanent magnetic particles on the inner ring surface of the coil ring shell.

[0015] The present invention has the following advantages: The present invention provides a gear locking transmission mechanism for an excavator gearbox through improvement, which has the following improvements compared with similar devices:

[0016] The present invention discloses a gear locking transmission mechanism for an excavator gearbox. An adsorption component is provided to realize multi-tooth meshing transmission of gears and gear rings to share the larger torque during locking, thereby reducing the strength requirements of the gears and gear rings and also increasing the service life of the gears and gear rings. A groove on the surface of the coil ring and permanent magnetic particles inside the groove are provided to improve the friction effect between the coil ring and the cast iron ring, thereby improving the instantaneous stop effect of locking. A guide component is provided to utilize hydraulic pressure to switch the locking and unlocking states between the first slot shaft and the gear to avoid friction and wear of the electromagnetic adsorption component during the unlocking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the internal structure of the gearbox and the axial side structure of the locking mechanism of the present invention;

[0019] Figure 3 It is a left-side structural schematic diagram of the locking mechanism of the present invention;

[0020] Figure 4 It is a schematic diagram of the explosion structure of the locking mechanism of the present invention from the left side;

[0021] Figure 5 It is a schematic diagram of the exploded structure of the adsorption assembly of the present invention from the left side;

[0022] Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 7 It is a schematic diagram of the structure of the left visual axis side of the clamping member of the present invention;

[0024] Figure 8 It is a schematic diagram of the left side sectional structure of the guide assembly of the present invention.

[0025] Among them: gearbox-1, locking mechanism-2, transmission shaft-21, first slot shaft-22, second slot shaft-23, absolute value feedback device-24, adsorption component-25, guide component-26, hinge frame-251, coil ring-252, cast iron ring-253, gear ring-254, positioning piece-255, gear-2551, empty ring-2552, oil groove-2553, bump-2554, grooved ring-261, press-fit ring-262, gasket-263, sealing ring-264, pressure valve-265. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 to Figure 8 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention. In the following paragraphs, the present invention is described in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of the embodiments of the present invention based on its overall structure. Embodiment 1:

[0029] See also Figure 1 to Figure 8 The present invention discloses a gear locking transmission mechanism for an excavator gearbox, comprising a gearbox 1; a locking mechanism 2 is provided at the left end of a relay shaft on the front side of the gearbox 1;

[0030] The locking mechanism 2 includes a transmission shaft 21 fixedly connected to the left end of the relay shaft on the front side of the gearbox 1; a first slot shaft 22 is welded and fixed to the left end of the transmission shaft 21, and an arc groove is provided on the outer ring surface of the first slot shaft 22; a second slot shaft 23 is welded and fixed to the left end of the first slot shaft 22, and a circular groove is provided at the center of the left end surface of the second slot shaft 23; an absolute value feedback device 24 is plugged and fixed to the circular groove at the left end of the second slot shaft 23; an adsorption component 25 is provided on the outside of the first slot shaft 22; a guide component 26 is rotatably provided on the left end of the adsorption component 25.

[0031] The adsorption assembly 25 includes an articulated frame 251 fixedly installed on the left side of the gearbox 1 housing by bolts, a magnetic coupling is provided at the connection between the right end of the transmission shaft 21 and the relay shaft of the gearbox 1, and a current output controller is fixedly installed on the top side of the left end of the articulated frame 251 by bolts, and the current output controller is respectively connected in series with the magnetic coupling and the coil ring 252 at the right end of the transmission shaft 21; a coil ring 252 is installed on the inner side of the articulated frame 251 by bolts, and the outer surface of the cast iron shell of the coil ring 252 is provided with a groove, and permanent magnetic particles are slidably arranged inside the groove, and the outer surface of the cast iron ring 253 shell is provided with rough protrusions that match the permanent magnetic particles on the inner ring surface of the coil ring 252 shell; a cast iron ring 253 is rotatably arranged on the inner ring side of the coil ring 252; the cast iron ring 253 is fixedly installed on the outer ring side of the gear ring 254; and a positioning member 255 is arranged on the inner ring wall of the gear ring 254 for meshing transmission.

[0032] The locking member 255 includes a gear 2551 meshingly arranged at the inner teeth of the gear ring 254; an empty ring 2552 is welded and fixed at the center through hole of the gear 2551; an oil groove 2553 with a diversion function is arranged inside the empty ring 2552; the inner ring wall of the empty ring 2552 is provided with ten groups of open grooves distributed in an annular shape, and a protrusion 2554 is slidably arranged on the inner wall of the open groove. Embodiment 2:

[0033] See also Figure 1 to Figure 8 Compared with the first embodiment, the present invention is a gear locking transmission mechanism for an excavator gearbox, and the present embodiment further includes: a guide assembly 26; the guide assembly 26 includes a grooved ring 261 rotatably arranged on the outer ring side of the empty ring 2552; a pressing ring 262 with a pressing and limiting function is fixedly installed at the front end of the grooved ring 261 by bolts; a gasket 263 is rotatably arranged at the rear end of the grooved ring 261; a sealing ring 264 is rotatably arranged on the inner groove wall of the grooved ring 261; and a pressure valve 265 is threadedly installed on the top screw groove of the grooved ring 261.

[0034] Based on the above, the working principle of the gear locking transmission mechanism for an excavator gearbox is:

[0035] When using the device, first connect the device to an external power source, and connect the pressure valve 265 to the hydraulic oil source through an external pipeline, so as to provide the device with the power and pressure control required for operation;

[0036] First, the hydraulic oil is introduced into the annular groove inside the grooved ring 261 through the externally connected pipeline through the pressure valve 265, and enters the oil groove 2553 through the oil hole, thereby increasing the internal pressure of the oil groove 2553 and pushing the protrusion 2554 on the inner ring side of the empty ring 2552 to float out of the empty ring 2552. Here, the empty ring 2552 and the groove on the second slot shaft 23 are engaged in a positioning action, thereby connecting the second slot shaft 23 and the gear 2551. Here, the gear 2551 drives the cast iron ring 253 and the gear ring 254 to rotate on the inner ring side of the coil ring 252. Here, the permanent magnetic particles on the inner ring side of the coil ring 252 are adsorbed on the inner ring groove of the coil ring 252 due to the magnetic field, thereby reducing the friction between the coil ring 252 and the cast iron ring 253.

[0037] When the locking action is performed, the external controller sends a command to the current output controller provided on the articulated frame 251, so that the current output controller works to control the magnetic coupling and the coil ring 252 at the right end of the transmission shaft 21 respectively;

[0038] Due to the output of the current output controller circuit, when the locking action is executed, the current output controller stops supplying energy to the magnetic coupling at the right end of the transmission shaft 21, and the current output controller turns to supply energy to the coil ring 252. The coil ring 252 is energized to generate a magnetic field. The permanent magnetic particles on the shell of the coil ring 252 are pushed by the magnetic field and float out of the groove of the outer shell of the coil ring 252. Here, the shell of the coil ring 252 forms a circle of protrusions, and forms a large friction with the protrusions on the surface of the cast iron ring 253.

[0039] At the same time, under the action of the strong magnetic field, a rapid braking and adsorption fixing state is formed between the coil ring 252 and the cast iron ring 253, and the cast iron ring 253 can lock the gear 2551 with the cooperation of the gear ring 254, and then the protrusion 2554 in the guide component 26 and the groove on the second slot shaft 23 are used to perform a locking action to quickly lock the transmission shaft 21 and the relay shaft on the front side of the gearbox 1, and the multiple sets of gears inside the gearbox 1 are locked through the relay shaft on the front side of the gearbox 1.

[0040] The present invention provides a gear locking transmission mechanism for an excavator gearbox through improvement. By setting an adsorption component 25, multi-tooth meshing transmission of a gear 2551 and a gear ring 254 is realized to share the larger torque during locking, thereby reducing the strength requirements of the gear 2551 and the gear ring 254, and also improving the service life of the gear 2551 and the gear ring 254. A groove on the surface of the coil ring 252 and permanent magnetic particles inside the groove are provided to improve the friction effect between the coil ring 252 and the cast iron ring 253, thereby improving the locking instantaneous stop effect. A guide component 26 is provided to utilize hydraulic pressure to switch the locking and unlocking states between the first slot shaft 22 and the gear 2551, so as to avoid friction and wear of the electromagnetic adsorption component during the unlocking process.

[0041] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0042] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gear locking transmission mechanism for an excavator gearbox, comprising a gearbox (1); a locking mechanism (2) is provided at the left end of a relay shaft on the front side of the gearbox (1); Features: The locking mechanism (2) comprises a transmission shaft (21) fixedly connected to the left end of the relay shaft on the front side of the gearbox (1); a first slot shaft (22) is welded and fixed to the left end of the transmission shaft (21), and an arc groove is provided on the outer ring surface of the first slot shaft (22); a second slot shaft (23) is welded and fixed to the left end of the first slot shaft (22), and a circular groove is provided at the center of the left end surface of the second slot shaft (23); an absolute value feedback device (24) is plugged and fixed to the circular groove at the left end of the second slot shaft (23); an adsorption component (25) is provided on the outer side of the first slot shaft (22); and a flow guide component (26) is rotatably provided on the left end of the adsorption component (25); The adsorption assembly (25) comprises an articulated frame (251) fixedly mounted on the left side of the gearbox (1) housing by means of bolts; a coil ring (252) is mounted on the inner side of the articulated frame (251) by means of bolts; and a cast iron ring (253) is rotatably mounted on the inner ring side of the coil ring (252); A magnetic coupling is provided at the connection between the right end of the transmission shaft (21) and the relay shaft of the gearbox (1), and a current output controller is fixedly installed on the top side of the left end of the articulated frame (251) by bolts, and the current output controller is respectively connected in series with the magnetic coupling at the right end of the transmission shaft (21) and the coil ring (252); a groove is provided on the outer surface of the cast iron shell of the coil ring (252), and permanent magnetic particles are slidably arranged inside the groove, and a rough protrusion is provided on the outer surface of the shell of the cast iron ring (253) to match the permanent magnetic particles on the inner ring surface of the shell of the coil ring (252).

2. The gear locking transmission mechanism for an excavator gearbox according to claim 1, characterized in that: The cast iron ring (253) is fixedly mounted on the outer ring side of the gear ring (254); and a retaining member (255) is provided on the inner ring wall of the gear ring (254) for meshing transmission.

3. The gear locking transmission mechanism for an excavator gearbox according to claim 2, characterized in that: The locking member (255) comprises a gear (2551) meshed with teeth arranged on the inner side of the gear ring (254); an empty ring (2552) is welded and fixed at the center through hole of the gear (2551).

4. The gear locking transmission mechanism for an excavator gearbox according to claim 3, characterized in that: An oil groove (2553) having a flow-guiding function is arranged inside the hollow ring (2552); the inner ring wall of the hollow ring (2552) is provided with ten groups of open grooves distributed in an annular shape, and a protrusion (2554) is slidably arranged on the inner wall of the open groove.

5. The gear locking transmission mechanism for an excavator gearbox according to claim 4, characterized in that: The flow guide assembly (26) comprises a grooved ring (261) rotatably arranged on the outer ring side of the empty ring (2552); a pressing ring (262) having a pressing and limiting function is fixedly installed at the front end of the grooved ring (261) by means of bolts; and a gasket (263) is rotatably arranged at the rear end of the grooved ring (261) in contact with the grooved ring.

6. The gear locking transmission mechanism for an excavator gearbox according to claim 5, characterized in that: A sealing ring (264) is rotatably provided on the inner groove wall of the grooved ring (261); and a pressure valve (265) is threadedly installed on the top screw groove of the grooved ring (261).

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