Connection protection device for hydraulic pump and power takeoff

Abstract

The invention belongs to the technical field of auxiliary driving devices, and particularly discloses a hydraulic pump and power takeoff connecting protection device which comprises a transmission sleeve, a backing ring is fixed to the position, located in the middle, between the inner walls of the transmission sleeve, an inner pushing groove is formed in the position, close to the bottom edge, between the inner walls of the transmission sleeve, and a transmission assembly is arranged in the transmission sleeve. A plurality of adjusting cavities are formed in the inner wall of the transmission sleeve in the circumferential direction at equal intervals, and positioning assemblies are arranged in the multiple adjusting cavities correspondingly. According to the power takeoff, the transmission assembly, the positioning assembly and the guide assembly are arranged, when the hydraulic pump is in butt joint with the power takeoff, power transmission can be conducted through the transmission assembly, and the rigidity of a material used by a driving gear in the transmission assembly is smaller than that of a material used by a gear ring; therefore, after large instantaneous impact is generated at the butt joint, the driving gear is damaged preferentially, so that power transmission is cut off, and other parts at the butt joint are protected from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary drive devices, and particularly relates to a connection protection device for a hydraulic pump and a power take-off. Background Art

[0002] A power take-off is a set of one or more speed-changing gears, also known as a power take-off unit. Generally, it is composed of a gearbox, a clutch, and a controller, and is connected to the low-speed gear of the gearbox or the output shaft of the auxiliary box to output power to an external working device. A power take-off is required to transmit power on special vehicles and needs to be connected to the hydraulic pump of the vehicle hydraulic system during installation to assist the hydraulic pump in power transmission.

[0003] Currently, when connecting a power take-off to a hydraulic pump, most use a connecting flange for butt joint. This butt joint method is a rigid butt joint. When there is mechanical interference or operation blockage from an external load, it will cause a large instantaneous impact at the butt joint where the power take-off is connected to the hydraulic pump, thereby damaging the mechanical structure at the butt joint and resulting in a high maintenance cost during subsequent maintenance. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art and provides a connection protection device for a hydraulic pump and a power take-off.

[0005] To achieve the above object, the present invention adopts the following technical solution: A connection protection device for a hydraulic pump and a power take-off, including a transmission sleeve. A spacer ring is fixed in the middle between the inner walls of the transmission sleeve. Inner push grooves are formed at the bottom edge near the inner walls of the transmission sleeve. A transmission component is arranged inside the transmission sleeve. A plurality of adjustment cavities are equidistantly formed along the circumferential direction on the inner wall of the transmission sleeve. Positioning components are arranged inside each of the plurality of adjustment cavities. A plurality of transmission grooves are equidistantly formed along the circumferential direction on the inner wall of the transmission sleeve. Guide components are arranged inside each of the plurality of transmission grooves. An annular indentation is formed on the outer surface of the transmission sleeve. An electro-controlled magnetic ring is slidably arranged inside the annular indentation. An output shaft is rotatably arranged between the inner walls of the transmission sleeve near the top edge. A groove is formed at the bottom of the output shaft. A gear ring is fixed between the inner walls of the groove near the bottom edge.

[0006] Preferably, the transmission component includes an adapter sleeve. The outer surface of the adapter sleeve is slidably fitted with the inner wall of the transmission sleeve. An inner push ring is fixed on the outer surface of the adapter sleeve. The inner push ring is slidably engaged between the inner walls of the inner push groove. A transmission shaft is rotatably arranged between the inner walls of the adapter sleeve. Two limit rings are fixed on the outer surface of the transmission shaft. Both of the two limit rings are correspondingly slidably engaged on the inner wall of the adapter sleeve.

[0007] Preferably, a driving gear is fixed to the top of the transmission shaft, a universal joint is fixed to the bottom of the transmission shaft, the top of the connecting sleeve is in mutual contact with the bottom of the cushion ring, the driving gear extends into the groove and meshes with the toothed ring, the top of the inner pushing ring is in mutual contact with the inner bottom surface of the inner pushing groove, a plurality of longitudinal cuts are equidistantly formed in the circumferential direction on the outer surface of the connecting sleeve, and a plurality of positioning holes are equidistantly formed in the circumferential direction on the outer surface of the connecting sleeve.

[0008] Preferably, the guiding assembly includes a transmission plate which is slidably connected between the inner walls on both sides of the transmission groove, a bent plate is fixed to the bottom of the transmission plate, a push rod is fixed to the bottom of the bent plate near one side edge, one end of the push rod penetrates into the inner pushing groove, a return spring is fixed to the bottom of the bent plate near the other side edge, and the bottom of the return spring is fixed to the inner bottom surface of the transmission groove.

[0009] Preferably, a cylindrical cavity is formed in one inner wall of the transmission groove, one end of the cylindrical cavity penetrates to the inner side of the transmission sleeve, a limiting rod is slidably arranged between the inner walls of the cylindrical cavity, an inclined opening is formed on the outer surface of the limiting rod, the inclined opening faces the front side of the transmission plate, a fixing strip is obliquely arranged on the front side of the transmission plate, the fixing strip is slidably clamped in the inclined opening, and one end of the limiting rod extends to the inner side of the transmission sleeve and is slidably clamped in the longitudinal cut.

[0010] Preferably, an inner cavity is formed in the inner wall of the transmission sleeve near the transmission groove, annular sealing grooves are formed in the inner bottom surface of the inner pushing groove and the bottom of the cushion ring, annular sealing rings are arranged in both annular sealing grooves, the interiors of both annular sealing rings are hollow, an annular rubber airbag is arranged between the inner walls of the inner cavity, two bridge connecting pipes are communicated with the outer surface of the annular rubber airbag, one ends of the two bridge connecting pipes are respectively communicated with the two annular sealing rings, and an annular pressing plate is fixed to the outer surface of the limiting rod and is located inside the inner cavity.

[0011] Preferably, an annular cavity is formed in the inner wall of the transmission sleeve, an annular retaining ring is slidably arranged in the annular cavity, a connecting rod is fixed to the bottom of the annular retaining ring, the bottom of the connecting rod slidably penetrates to the inside of the transmission groove and is fixed to the top of the transmission plate.

[0012] Preferably, the positioning assembly includes a sliding column which is slidably connected between the inner walls of the adjusting cavity, an oil inlet cavity is formed in the inner wall of the transmission sleeve near one side edge, an oil outlet cavity is formed in the inner wall of the transmission sleeve near the other side edge, a return oil pipe communicated with the inside of the oil inlet cavity is fixed to the outer surface of one side of the transmission sleeve, and an oil outlet pipe communicated with the inside of the oil outlet cavity is fixed to the outer surface of the other side of the transmission sleeve.

[0013] Preferably, a plurality of flow channels are equidistantly formed in the inner top surface of the oil inlet chamber and the inner top surface of the oil outlet chamber. One ends of the plurality of flow channels respectively penetrate through to the inside of the transmission sleeve and are located in the area above the gasket ring and below the output shaft. The plurality of flow channels respectively communicate with the adjustment chamber. One end of the adjustment chamber penetrates through and communicates with the annular chamber at the middle position and extends to the inside of the transmission sleeve.

[0014] Preferably, a transition chamber is formed in the inner side of the slide column near the edge. A plurality of filter holes penetrating through to the outer surface of the slide column are equidistantly formed in the inner wall of the transition chamber along the circumferential direction. A magnetic column is fixed at one end of the slide column. A positioning rod is fixed at the other end of the slide column. One end of the positioning rod slidably extends into the annular chamber and is attached to the outer surface of the annular retaining ring. An adjustment spring is fixed at the other end of the slide column. One end of the adjustment spring is fixed on the inner wall of one side of the adjustment chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By providing a transmission assembly, a positioning assembly and a guiding assembly, when the hydraulic pump is docked with the power take-off, power transmission can be carried out through the transmission assembly. Moreover, the rigidity of the material used for the driving gear in the transmission assembly is smaller than that of the material used for the gear ring. Therefore, after a large instantaneous impact occurs at the docking position, the driving gear will be damaged first, thereby truncating the power transmission to protect other parts at the docking position from damage. When installing the transmission assembly, it is guided by the guiding assembly so that it can smoothly slide into the transmission sleeve, and then it is positioned and fixed by the positioning assembly, thus completing the docking and assembly. 2. By providing a transmission assembly, when the hydraulic pump is docked with the power take-off, power transmission is carried out through the transmission assembly. Moreover, during the process of installing the transmission assembly inside the transmission sleeve, it will trigger the guiding assembly to guide it, and at the same time trigger the positioning assembly to position it through the guiding assembly. During the working process, the transmission methods of the transmission assembly, the positioning assembly and the guiding assembly are interrelated. 3. By providing a guiding assembly, when the connecting sleeve is installed on the inner wall of the transmission sleeve, the connecting sleeve can be guided. When the guiding assembly works, first slide the connecting sleeve from the bottom of the transmission sleeve into the inside. During the sliding process, the inner pushing ring slides inside the inner pushing groove and pushes the push rod upward. When the push rod is pushed upward, it will drive the transmission plate to slide upward above the transmission groove. During the sliding process, one end of the limiting rod can be pushed into the inside of the transmission sleeve by the mutual restraint between the fixing strip and the inclined opening on the limiting rod, so that it is clamped inside the longitudinal incision on the outer surface of the connecting sleeve, thereby preventing the connecting sleeve from rotating. 4. The present invention is provided with a positioning component, which can position the connecting sleeve after the connecting sleeve is installed in place, so that the connecting sleeve and the transmission sleeve are fixed to each other. In the process of the connecting sleeve sliding toward the inside of the transmission sleeve, the transmission plate is slid upward by the push rod, and the connecting rod will drive the annular retaining ring upward. After the connecting sleeve is installed in place, the annular retaining ring is lifted to the top of one end of the positioning rod, and under the elastic force of the adjusting spring, the sliding column can be driven to slide toward one side of the adjusting cavity, so that one end of the positioning rod extends to the inside of the transmission sleeve and is engaged with the positioning hole on the outer surface of the connecting sleeve. At this time, the connecting sleeve and the transmission sleeve are fixed to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a three-dimensional structure of one side of a connection protection device between a hydraulic pump and a power take-off is provided for the present invention; Figure 2 A schematic diagram of the other side of the three-dimensional structure of a connection protection device between a hydraulic pump and a power take-off proposed by the present invention; Figure 3 The present invention provides a schematic diagram of the main perspective structure of a transmission assembly in a connection protection device between a hydraulic pump and a power take-off; Figure 4 A schematic diagram of a sectional three-dimensional structure of a connection protection device between a hydraulic pump and a power take-off is provided in the present invention; Figure 5 A schematic diagram of a cross-sectional three-dimensional structure of another side of a connection protection device between a hydraulic pump and a power take-off provided by the present invention; Figure 6 The present invention provides a schematic diagram of a three-dimensional structure of the internal structure of a connection protection device between a hydraulic pump and a power take-off; Figure 7 For the present invention Figure 4 A partial enlarged view of point A in the middle; Figure 8 For the present invention Figure 5 A magnified partial view of point B in the middle.

[0017] In the figure: 1, drive sleeve; 2, annular indentation; 3, electro-control magnetic ring; 4, oil return pipe; 5, oil outlet pipe; 6, connecting sleeve; 7, inner push ring; 8, transmission shaft; 9, cross joint; 10, output shaft; 11, longitudinal incision; 12, limit ring; 13, driving gear; 14, groove; 15, gear ring; 16, spacer ring; 17, inner push groove; 18, flow channel; 19, positioning hole; 20, oil inlet chamber; 21, oil outlet chamber; 22, adjustment chamber; 23, sliding column; 24, transition chamber; 25, filter hole; 26, magnetic column; 27, positioning rod; 28, adjustment spring; 29, annular chamber; 30, annular retaining ring; 31, drive groove; 32, drive plate; 33, fixing strip; 34, bending plate; 35, return spring; 36, push rod; 37, cylindrical chamber; 38, limit rod; 39, beveled opening; 40, inner cavity; 41, annular pressing plate; 42, annular rubber airbag; 43, annular sealing groove; 44, annular sealing ring; 45, bridge connecting pipe; 46, connecting rod. Specific implementation manner

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1-8 , the present invention provides a technical solution: a connection protection device for a hydraulic pump and a power take-off, including a drive sleeve 1. A spacer ring 16 is fixed at the middle between the inner walls of the drive sleeve 1. An inner push groove 17 is provided at the bottom edge near the inner walls of the drive sleeve 1. A drive assembly is arranged inside the drive sleeve 1. A plurality of adjustment chambers 22 are equidistantly arranged along the circumferential direction of the inner wall of the drive sleeve 1. A positioning assembly is arranged inside each of the plurality of adjustment chambers 22. A plurality of drive grooves 31 are equidistantly arranged along the circumferential direction of the inner wall of the drive sleeve 1. A guiding assembly is arranged inside each of the plurality of drive grooves 31; An annular indentation 2 is provided on the outer surface of the drive sleeve 1. An electro-control magnetic ring 3 is slidably arranged inside the annular indentation 2. An output shaft 10 is rotatably arranged between the inner walls of the drive sleeve 1 near the top edge. A groove 14 is provided at the bottom of the output shaft 10. A gear ring 15 is fixed between the inner walls of the groove 14 near the bottom edge.

[0020] The achieved effect is that by providing a transmission component, a positioning component, and a guiding component, when the hydraulic pump is docked with the power take-off, power transmission can be carried out through the transmission component. Moreover, the rigidity of the material used for the driving gear 13 in the transmission component is smaller than that of the material used for the gear ring 15. Therefore, after a large instantaneous impact occurs at the docking location, the driving gear 13 will be damaged first, thereby truncating the power transmission to protect other parts at the docking location from damage. During subsequent maintenance, only the transmission component needs to be taken out, which is convenient for subsequent repair. When installing the transmission component, it is guided by the guiding component so that it can smoothly slide into the transmission sleeve 1, and then it is positioned and fixed by the positioning component, thus completing the docking and assembly. This solves the problem that when currently connecting the power take-off to the hydraulic pump, most use a connecting flange for docking. This docking method is a rigid docking. When mechanical interference or operation obstruction occurs in the external load, it will cause a large instantaneous impact at the docking location where the power take-off is connected to the hydraulic pump, thereby damaging the mechanical structure at the docking location, and the maintenance cost is relatively high during subsequent maintenance.

[0021] As Figure 1 , Figure 3 , Figure 4 and Figure 5 shown, the transmission component includes an adapter sleeve 6. The outer surface of the adapter sleeve 6 is slidably fitted with the inner wall of the transmission sleeve 1. An inner push ring 7 is fixed on the outer surface of the adapter sleeve 6. The inner push ring 7 is slidably engaged between the inner walls of the inner push grooves 17. A transmission shaft 8 is rotatably arranged between the inner walls of the adapter sleeve 6. Two limit rings 12 are fixed on the outer surface of the transmission shaft 8. Both of the two limit rings 12 are correspondingly slidably engaged on the inner wall of the adapter sleeve 6. A driving gear 13 is fixed at the top of the transmission shaft 8. A cross joint 9 is fixed at the bottom of the transmission shaft 8. The top of the adapter sleeve 6 is mutually attached to the bottom of the cushion ring 16. The driving gear 13 extends into the groove 14 and meshes with the gear ring 15. The top of the inner push ring 7 is mutually attached to the inner bottom surface of the inner push groove 17. A plurality of longitudinal cuts 11 are equidistantly arranged on the outer surface of the adapter sleeve 6 in the circumferential direction. A plurality of positioning holes 19 are equidistantly arranged on the outer surface of the adapter sleeve 6 in the circumferential direction.

[0022] The achieved effect is that when the hydraulic pump is docked with the power take-off, power transmission is carried out through the transmission component. Moreover, during the process of installing the transmission component inside the transmission sleeve 1, it will trigger the guiding component to guide it, and at the same time, trigger the positioning component to position it through the guiding component. During the working process, the transmission methods of the transmission component, the positioning component, and the guiding component are interrelated. When docking, the driving gear 13 and the gear ring 15 are meshed with each other to complete power transmission.

[0023] As Figure 4 , Figure 6 and Figure 7As shown in the figure, the guiding component includes a transmission plate 32, which is slidably connected between the inner walls on both sides of the transmission groove 31. A bent plate 34 is fixed to the bottom of the transmission plate 32. A push rod 36 is fixed to the bottom of the bent plate 34 near one edge. One end of the push rod 36 penetrates into the inner push groove 17. A return spring 35 is fixed to the bottom of the bent plate 34 near the other edge. The bottom of the return spring 35 is fixed to the inner bottom surface of the transmission groove 31. A cylindrical cavity 37 is formed in one inner wall of the transmission groove 31. One end of the cylindrical cavity 37 penetrates to the inner side of the transmission sleeve 1. A limiting rod 38 is slidably arranged between the inner walls of the cylindrical cavity 37. An inclined opening 39 is formed on the outer surface of the limiting rod 38, and the inclined opening 39 faces the front side of the transmission plate 32. A fixing strip 33 is obliquely arranged on the front side of the transmission plate 32, and the fixing strip 33 is slidably engaged in the inclined opening 39. One end of the limiting rod 38 extends to the inner side of the transmission sleeve 1 and is slidably engaged in the longitudinal incision 11. An inner cavity 40 is formed in the inner wall of the transmission sleeve 1 near the transmission groove 31. Annular sealing grooves 43 are formed on the inner bottom surface of the inner push groove 17 and the bottom of the gasket ring 16. Annular sealing rings 44 are arranged in both annular sealing grooves 43. The interiors of both annular sealing rings 44 are hollow. An annular rubber airbag 42 is arranged between the inner walls of the inner cavity 40. Two bridge connecting pipes 45 are communicated with the outer surface of the annular rubber airbag 42. One end of each of the two bridge connecting pipes 45 is communicated with one of the two annular sealing rings 44 respectively. An annular pressing plate 41 is fixed to the outer surface of the limiting rod 38, and the annular pressing plate 41 is located in the inner cavity 40. An annular cavity 29 is formed in the inner wall of the transmission sleeve 1. An annular retaining ring 30 is slidably arranged in the annular cavity 29. A connecting rod 46 is fixed to the bottom of the annular retaining ring 30. The bottom of the connecting rod 46 slidably penetrates into the transmission groove 31 and is fixed to the top of the transmission plate 32.

[0024] The achieved effect is that the connection sleeve 6 slides from the bottom of the drive sleeve 1 into the interior. During the sliding process, the inner push ring 7 slides inside the inner push groove 17 and pushes the push rod 36 upward. When the push rod 36 is pushed upward, it drives the drive plate 32 to slide above the drive groove 31. During the sliding process, through the mutual restraint between the fixing strip 33 and the inclined opening 39 on the limiting rod 38, one end of the limiting rod 38 can be pushed into the interior of the drive sleeve 1 and engaged inside the longitudinal incision 11 on the outer surface of the connection sleeve 6, thereby preventing the connection sleeve 6 from rotating. And after the connection sleeve 6 is installed in place, the sealing of the fitting part of the connection sleeve 6 is strengthened. After the connection sleeve 6 is installed, the top of the inner push ring 7 will fit with the inner bottom surface of the inner push groove 17, and the top of the connection sleeve 6 will fit with the bottom of the cushion ring 16. Since the inner bottom surface of the inner push groove 17 and the inner bottom surface of the cushion ring 16 are both provided with annular sealing grooves 43, and annular sealing rings 44 are arranged inside the annular sealing grooves 43. When the limiting rod 38 positions the connection sleeve 6, during the process of extending into the interior of the drive sleeve 1, it will drive the annular pressing plate 41 to slide and press the annular rubber airbag 42, so that the gas inside the annular rubber airbag 42 flows into the annular sealing ring 44 through the bridge connecting pipe 45, causing the annular sealing ring 44 to expand outward, thereby improving the sealing performance with the fitting part.

[0025] As Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, the positioning assembly includes a sliding column 23. The sliding column 23 is slidably connected between the inner walls of the adjustment cavity 22. An oil inlet cavity 20 is opened at the inner wall of the drive sleeve 1 near one side edge, and an oil outlet cavity 21 is opened at the inner wall of the drive sleeve 1 near the other side edge. A return oil pipe 4 communicating with the interior of the oil inlet cavity 20 is fixed on the outer surface of one side of the drive sleeve 1, and an oil outlet pipe 5 communicating with the interior of the oil outlet cavity 21 is fixed on the outer surface of the other side of the drive sleeve 1. The inner top surface of the oil inlet cavity 20 and the inner top surface of the oil outlet cavity 21 are both equidistantly provided with a plurality of flow channels 18. One ends of the plurality of flow channels 18 respectively penetrate through to the interior of the drive sleeve 1 and are located in the area above the cushion ring 16 and below the output shaft 10. The plurality of flow channels 18 respectively communicate with the adjustment cavity 22. One end of the adjustment cavity 22 located in the middle communicates with the annular cavity 29 and extends into the interior of the drive sleeve 1. A transition cavity 24 is opened at the inner part of the sliding column 23 near one side edge. The inner wall of the transition cavity 24 is equidistantly provided with a plurality of filter holes 25 penetrating to the outer surface of the sliding column 23 along the circumferential direction. One end of the sliding column 23 is fixed with a magnetic column 26, and the other end of the sliding column 23 is fixed with a positioning rod 27. One end of the positioning rod 27 slidably extends into the annular cavity 29 and fits with the outer surface of the annular retaining ring 30. The other end of the sliding column 23 is fixed with an adjustment spring 28, and one end of the adjustment spring 28 is fixed on one side inner wall of the adjustment cavity 22.

[0026] The effect achieved is that, during the process of the connecting sleeve 6 sliding toward the inside of the transmission sleeve 1, the transmission plate 32 is slid upward by the push rod 36, and the connecting rod 46 is driven to lift the annular retaining ring 30 upward. After the connecting sleeve 6 is installed in place, the annular retaining ring 30 is lifted to the top of one end of the positioning rod 27. Under the elastic force of the adjusting spring 28, the sliding column 23 can be driven to slide toward one side of the adjusting cavity 22, so that one end of the positioning rod 27 extends to the inside of the transmission sleeve 1 and is engaged with the positioning hole 19 on the outer surface of the connecting sleeve 6. At this time, the connecting sleeve 6 and the transmission sleeve 1 are mutually connected. At the same time, as the sliding post 23 slides to one side of the regulating chamber 22, the filter hole 25 will be connected with the flow channel 18, so that the lubricating oil can circulate. In the initial state, the annular retaining ring 30 is located at one end of the positioning rod 27, which can limit the positioning rod 27 from extending into the transmission sleeve 1. At this time, the filter hole 25 is offset from the flow channel 18, and the connecting part of the flow channel 18 at the regulating chamber 22 fits with the outer surface of the sliding post 23. The flow channel 18 is cut off by the outer surface of the sliding post 23. At this time, the oil circulates back and forth, and the transmission assembly is not installed in place at this time.

[0027] Working principle: When using this device, first connect the oil return pipe 4 to the outlet of the external lubricating oil supply device, and connect the oil outlet pipe 5 to the inlet of the external lubricating oil supply device, so as to ensure that the lubricating oil in the internal transmission part of the transmission sleeve 1 can circulate during subsequent operation, lubricating the transmission part and cooling it at the same time. During the process of installing the transmission component inside the transmission sleeve 1, the guiding component will be triggered to guide it, and at the same time, the positioning component will be triggered by the guiding component to position it. Slide the connecting sleeve 6 from the bottom of the transmission sleeve 1 into the interior. During the sliding process, the inner pushing ring 7 slides inside the inner pushing groove 17 and pushes the push rod 36 upward. When the push rod 36 is pushed upward, it will drive the transmission plate 32 to slide above the transmission groove 31. During the sliding process, by the mutual restraint between the fixing strip 33 and the inclined opening 39 on the limiting rod 38, one end of the limiting rod 38 can be pushed into the interior of the transmission sleeve 1 and engaged inside the longitudinal incision 11 on the outer surface of the connecting sleeve 6, thus preventing the connecting sleeve 6 from rotating. And after the connecting sleeve 6 is installed in place, the sealing of the fitting part of the connecting sleeve 6 is strengthened. After the connecting sleeve 6 is installed, the top of the inner pushing ring 7 will fit with the inner bottom surface of the inner pushing groove 17, and the top of the connecting sleeve 6 will fit with the bottom of the cushion ring 16. Since the inner bottom surfaces of the inner pushing groove 17 and the cushion ring 16 are both provided with annular sealing grooves 43, and annular sealing rings 44 are arranged inside the annular sealing grooves 43. When the limiting rod 38 positions the connecting sleeve 6, since it will drive the annular pressing plate 41 to slide during the process of extending into the interior of the transmission sleeve 1, pressing the annular rubber airbag 42, so that the gas inside the annular rubber airbag 42 flows into the annular sealing ring 44 through the bridge connecting pipe 45, making the annular sealing ring 44 expand outward, thereby improving the sealing performance with the fitting place. After the connecting sleeve 6 is installed in place, the connecting sleeve 6 is positioned so that the connecting sleeve 6 and the transmission sleeve 1 are fixed to each other. During the process of the connecting sleeve 6 sliding into the interior of the transmission sleeve 1, while driving the transmission plate 32 to slide upward through the push rod 36, it will drive the connecting rod 46 to lift the annular retaining ring 30 upward. After the connecting sleeve 6 is installed in place, at this time, the annular retaining ring 30 is lifted above one end of the positioning rod 27. Under the elastic force of the adjusting spring 28, it can drive the sliding column 23 to slide toward the adjusting cavity 22 side, so that one end of the positioning rod 27 extends into the interior of the transmission sleeve 1 and is engaged inside the positioning hole 19 on the outer surface of the connecting sleeve 6. At this time, the connecting sleeve 6 and the transmission sleeve 1 are fixed to each other. At the same time, since the sliding column 23 slides toward the adjusting cavity 22 side, the filter hole 25 will communicate with the flow channel 18, and thus the lubricating oil can circulate. In the initial state, the annular retaining ring 30 is located at one end of the positioning rod 27, which can limit the positioning rod 27 from extending into the interior of the transmission sleeve 1. At this time, the filter hole 25 is misaligned with the flow channel 18, and the connecting part of the flow channel 18 at the adjusting cavity 22 fits with the outer surface of the sliding column 23, and the flow channel 18 is cut off by the outer surface of the sliding column 23. At this time, the oil reciprocates and circulates, and at this time, the transmission component is not installed in place either.During subsequent reset, it is only necessary to slide the electric control magnetic ring 3 to one side of the annular indentation 2 to adsorb the magnetic column 26 outward, thereby releasing the positioning of the positioning rod 27.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 connection protection device for a hydraulic pump and a power take-off, characterized in that: The invention comprises a transmission sleeve (1), a gasket (16) is fixed at the middle between the inner walls of the transmission sleeve (1), an inner push groove (17) is provided between the inner walls of the transmission sleeve (1) near the bottom edge, a transmission assembly is arranged inside the transmission sleeve (1), a plurality of adjustment cavities (22) are equidistantly provided on the inner wall of the transmission sleeve (1) along the circumferential direction, a positioning assembly is arranged inside each of the plurality of adjustment cavities (22), a plurality of transmission grooves (31) are equidistantly provided on the inner wall of the transmission sleeve (1) along the circumferential direction, a guide assembly is arranged inside each of the plurality of transmission grooves (31); The outer surface of the transmission sleeve (1) is provided with an annular groove (2), an electrically controlled magnetic ring (3) is slidably arranged inside the annular groove (2), an output shaft (10) is rotatably arranged between the inner walls of the transmission sleeve (1) near the top edge, a groove (14) is provided at the bottom of the output shaft (10), and a gear ring (15) is fixed between the inner walls of the groove (14) near the bottom edge.

2. A connection protection device for a hydraulic pump and a power take-off according to claim 1, characterized in that: The transmission assembly comprises a connecting sleeve (6), the outer surface of the connecting sleeve (6) is slidably fitted with the inner wall of the transmission sleeve (1), an inner push ring (7) is fixed on the outer surface of the connecting sleeve (6), the inner push ring (7) is slidably engaged between the inner walls of the inner push groove (17), a transmission shaft (8) is rotatably arranged between the inner walls of the connecting sleeve (6), two limiting rings (12) are fixed on the outer surface of the transmission shaft (8), and the two limiting rings (12) are correspondingly slidably engaged on the inner wall of the connecting sleeve (6).

3. A connection protection device for a hydraulic pump and a power take-off according to claim 2, characterized in that: A driving gear (13) is fixed to the top of the transmission shaft (8), a cross joint (9) is fixed to the bottom of the transmission shaft (8), the top of the connecting sleeve (6) and the bottom of the gasket (16) are in contact with each other, the driving gear (13) extends into the groove (14) and meshes with the gear ring (15), the top of the inner push ring (7) and the inner bottom surface of the inner push groove (17) are in contact with each other, the outer surface of the connecting sleeve (6) is provided with a plurality of longitudinal cuts (11) at equal intervals along the circumferential direction, and the outer surface of the connecting sleeve (6) is provided with a plurality of positioning holes (19) at equal intervals along the circumferential direction.

4. A connection protection device for a hydraulic pump and a power take-off according to claim 3, characterized in that: The guide assembly comprises a transmission plate (32), the transmission plate (32) being slidably connected between the inner walls of both sides of the transmission groove (31), a bending plate (34) being fixed at the bottom of the transmission plate (32), a push rod (36) being fixed at the bottom of the bending plate (34) near one side edge, one end of the push rod (36) passing through the interior of the inner push groove (17), a return spring (35) being fixed at the bottom of the bending plate (34) near the other side edge, and the bottom of the return spring (35) being fixed to the inner bottom surface of the transmission groove (31).

5. A connection protection device for a hydraulic pump and a power take-off according to claim 4, characterized in that: A cylindrical cavity (37) is formed on the inner wall of one side of the transmission groove (31), one end of the cylindrical cavity (37) penetrates to the inner side of the transmission sleeve (1), a limit rod (38) is slidably arranged between the inner walls of the cylindrical cavity (37), an oblique opening (39) is formed on the outer surface of the limit rod (38), the oblique opening (39) faces the front side of the transmission plate (32), a fixing strip (33) is obliquely arranged on the front side of the transmission plate (32), the fixing strip (33) is slidably engaged in the inside of the oblique opening (39), one end of the limit rod (38) extends to the inner side of the transmission sleeve (1) and is slidably engaged in the inside of the longitudinal cut (11).

6. A connection protection device for a hydraulic pump and a power take-off according to claim 5, characterized in that: An inner cavity (40) is formed on the inner wall of the transmission sleeve (1) near the transmission groove (31), an annular sealing groove (43) is formed on the inner bottom surface of the inner push groove (17) and the bottom of the gasket (16), an annular sealing ring (44) is provided inside the two annular sealing grooves (43), the insides of the two annular sealing rings (44) are both hollow, an annular rubber airbag (42) is provided between the inner walls of the inner cavity (40), the outer surface of the annular rubber airbag (42) is connected to two bridging pipes (45), one end of the two bridging pipes (45) is respectively connected to the two annular sealing rings (44), and an annular pressure plate (41) is fixed to the outer surface of the limit rod (38), and the annular pressure plate (41) is located inside the inner cavity (40).

7. A connection protection device for a hydraulic pump and a power take-off according to claim 6, characterized in that: The inner wall of the transmission sleeve (1) is provided with an annular cavity (29), an annular retaining ring (30) is slidably arranged inside the annular cavity (29), a connecting rod (46) is fixed to the bottom of the annular retaining ring (30), and the bottom of the connecting rod (46) slides through the inside of the transmission groove (31) and is fixed to the top of the transmission plate (32).

8. A connection protection device for a hydraulic pump and a power take-off according to claim 7, characterized in that: The positioning assembly comprises a sliding column (23), the sliding column (23) being slidably connected between the inner walls of the adjustment cavity (22); an oil inlet cavity (20) is provided on the inner wall of the transmission sleeve (1) near one side edge, and an oil outlet cavity (21) is provided on the inner wall of the transmission sleeve (1) near the other side edge; an oil return pipe (4) connected to the inside of the oil inlet cavity (20) is fixed on the outer surface of one side of the transmission sleeve (1), and an oil outlet pipe (5) connected to the inside of the oil outlet cavity (21) is fixed on the outer surface of the other side of the transmission sleeve (1).

9. A connection protection device for a hydraulic pump and a power take-off according to claim 8, characterized in that: The inner top surfaces of the oil inlet chamber (20) and the inner top surfaces of the oil outlet chamber (21) are both provided with a plurality of flow channels (18) at equal intervals, one end of each of the plurality of flow channels (18) correspondingly penetrates the interior of the transmission sleeve (1) and is located in an area above the gasket (16) and below the output shaft (10), the plurality of flow channels (18) correspondingly penetrate the regulating chamber (22), one end of the regulating chamber (22) is located in the middle and penetrates the annular chamber (29), and extends to the interior of the transmission sleeve (1).

10. A connection protection device for a hydraulic pump and a power take-off according to claim 9, characterized in that: A transition cavity (24) is provided inside the sliding column (23) near one side edge, and a plurality of filter holes (25) are provided on the inner wall of the transition cavity (24) at equal intervals along the circumferential direction and penetrate to the outer surface of the sliding column (23). A magnetic column (26) is fixed to one end of the sliding column (23), and a positioning rod (27) is fixed to the other end of the sliding column (23). One end of the positioning rod (27) slides and extends into the annular cavity (29) and fits with the outer surface of the annular retaining ring (30). An adjustment spring (28) is fixed to the other end of the sliding column (23), and one end of the adjustment spring (28) is fixed to the inner wall of one side of the adjustment cavity (22).

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