Universal transmission shaft and rotary tiller

Abstract

The present invention discloses a universal transmission shaft and a rotary tiller, which relate to the technical field of universal transmission shafts. The universal transmission shaft comprises a shield assembly sleeved on the side wall of the universal transmission shaft body, the universal transmission shaft body comprises a driving shaft, a driven shaft and two universal joints, and a spline shaft and a spline sleeve are provided between the two universal joints, and the shield assembly comprises: two fixing rings. The universal transmission shaft and the rotary tiller can provide good protection for the universal transmission shaft body, avoid contamination by impurities such as dust, weeds and water stains, and ensure the effectiveness and life of the use; facilitate the detection of the shaking amplitude of the spline sleeve, and if the shaking amplitude is large, an external alarm will sound an alarm, ensuring the effectiveness and life of the use, and more safe and reliable; can provide a good cooling effect on the spline shaft, ensure the effect of the spline shaft and the spline sleeve being used in combination, thereby ensuring the effectiveness and life of the universal transmission shaft body.

Description

Technical Field

[0001] The present invention relates to the technical field of universal joint transmission shafts, in particular to a universal joint transmission shaft and a rotary tiller. Background Art

[0002] The universal joint drive shaft is an important component of the rotary tiller transmission system. It connects the tractor power take-off shaft (PTO) and the rotary tiller gearbox to transmit rotational power and can adapt to the relative movement between the tractor and the rotary tiller. It is mainly composed of a driving shaft, a driven shaft, two universal joints, a spline shaft and a spline sleeve. The rotary tiller is a commonly used land preparation machine in agricultural production, mainly used for plowing soil, breaking up soil and leveling the ground.

[0003] However, existing universal joint drive shafts and rotary tillers are directly exposed to the outside during use, making them susceptible to contamination from impurities such as dust, weeds, and water stains, which can affect their performance and lifespan. Furthermore, when the spline shaft and spline sleeve are insufficiently lubricated or experience abnormal wear, abnormal vibrations between the spline sleeve and the spline shaft can occur, which is difficult to detect in time, affecting their performance and lifespan and making them unsafe and unreliable. Furthermore, when the spline shaft and spline sleeve slide relative to each other (axially move) and engage in transmission, friction between the tooth surfaces generates heat. In particular, when lubrication is insufficient or clearance is excessive, friction intensifies, leading to significant temperature rise. High temperatures can accelerate component wear, cause grease failure, and even cause serious problems such as spline deformation and breakage, further impacting their performance and lifespan. Summary of the Invention

[0004] The object of the present invention is to provide a universal joint transmission shaft and a rotary tiller to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a universal joint transmission shaft, comprising a shield assembly sleeved on the side wall of the universal joint transmission shaft body, wherein the universal joint transmission shaft body comprises a driving shaft, a driven shaft and two universal joints, and a spline shaft and a spline sleeve are provided between the two universal joints, and the shield assembly comprises:

[0006] Two fixing rings fixedly sleeved on the side walls of the spline shaft;

[0007] Two rigid covers are sleeved on the side walls of the universal joint and are rotatably connected to the side walls of the fixed ring via a rotating ring;

[0008] two flanges, respectively fixed to the side walls of each of the rigid covers;

[0009] A telescopic cover is detachably connected between the two rigid covers through a mounting mechanism and sleeved on the side wall of the universal joint shaft body;

[0010] A detection mechanism is provided in the shield assembly and is used to detect the shaking of the spline sleeve;

[0011] The heat dissipation mechanism is arranged in the shield assembly and is used for blowing air to dissipate heat for the spline shaft.

[0012] Preferably, the detection mechanism includes a connecting rod fixedly connected to the inner wall of the rigid cover, and the side wall of the connecting rod is fixedly connected to an annular tube, and the side wall of the annular tube is fixedly inserted with a plurality of fixed boxes, the fixed boxes and the annular tube are filled with hydraulic oil, and the side wall of the fixed box close to the spline sleeve is connected to a U-shaped plate through a telescopic mechanism, the side wall of the U-shaped plate is rotatably connected to a roller through a first rotating shaft, and the side wall of the fixed box is fixedly inserted in the fixed tube, and a piston is slidably connected in the fixed tube, the side wall of the U-shaped plate is provided with an extrusion mechanism for squeezing the hydraulic oil in the fixed box, and the side wall of the fixed box is provided with a detection component for detecting the movement of the piston.

[0013] Preferably, the extrusion mechanism includes an L-shaped tube fixedly connected to the side wall of the fixed box, and a moving rod is inserted into the L-shaped tube, and a first connecting block is fixedly connected between the lower end of the moving rod and the U-shaped plate.

[0014] Preferably, the detection component includes a connecting plate fixedly connected to the side wall of the fixed box, and the top of the connecting plate is rotatably connected to a pointer through a second rotating shaft, the top of the connecting plate is fixedly connected to a bracket, and the side wall of the bracket is fixedly connected to an arc-shaped scale plate, the top of the bracket is fixedly connected to an L-shaped block, and the top of the L-shaped block is fixedly inserted with a visual sensor, and the rotation of the pointer is driven by a pushing mechanism.

[0015] Preferably, the pushing mechanism includes a slide groove opened at the top of the pointer, and the end of the piston is fixedly connected to a support plate, the side wall of the support plate is fixedly connected to a second connecting block, the bottom of the second connecting block is fixedly connected to a pushing pin, and the pushing pin is inserted in the slide groove.

[0016] Preferably, the telescopic mechanism includes two symmetrically arranged sleeves fixedly connected to the side walls of the fixed box, and a sleeve rod is inserted into each sleeve, the lower end of the sleeve rod is fixed to the U-shaped plate, and a spring is sleeved on the side wall of each sleeve.

[0017] Preferably, the heat dissipation mechanism includes a support tube fixedly connected to the side wall of the connecting rod, and the lower end of the support tube is fixedly connected to a telescopic tube, the lower end of the telescopic tube is fixedly connected to a working tube, and the inner wall of the working tube is fixedly connected to a fixed block, the bottom of the fixed block is rotatably connected to a fan via a rotating shaft, and the rotation of the rotating shaft is driven by a driving mechanism, the upper end of the support tube is fixedly connected to an arc cover, and two opposite side walls of the arc cover are provided with multiple air inlet holes, a first partition and a second partition with a hollow arrangement are fixedly connected in the arc cover, and the first partition and the second partition are arranged to pass through the side walls of the telescopic cover, and the first partition and the second partition are filled with coolant.

[0018] Preferably, the driving mechanism includes a driven bevel gear fixedly connected to the upper end of the rotating shaft, and the side wall of the first rotating shaft is fixedly connected to a connecting shaft, the connecting shaft passes through the working tube and is fixedly connected to the driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear.

[0019] Preferably, the mounting mechanism includes a plurality of first mounting blocks arranged in an array and fixedly connected to the side wall of the rigid cover, and a plurality of second mounting blocks arranged in an array and fixedly connected to the side wall of the telescopic cover, and the second mounting block and the first mounting block are detachably connected by bolts.

[0020] A rotary tiller comprises a tractor, a rotary tillage module, and a universal transmission shaft.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) This universal joint drive shaft and rotary tiller are provided with a protective cover assembly. When in use, the driving shaft is connected to the output end of the tractor, and the driven shaft is connected to the input end of the rotary tiller module. In addition, the two flanges are fixed on the tractor and the rotary tiller module respectively. Through the provision of the rigid cover and the telescopic cover, the universal joint drive shaft body can be well protected to avoid contamination by impurities such as dust, weeds and water stains, thereby ensuring its effectiveness and life.

[0023] (2) This universal joint transmission shaft and rotary tiller, by providing a detection mechanism, etc., can make the roller abut against the side wall of the spline sleeve under the action of the spring when in use. When the spline sleeve rotates, it can drive the roller to rotate. When the spline sleeve shakes abnormally on the spline shaft, it can push one or more rollers to move in the direction close to the fixed box. At the same time, the first connecting block drives the moving rod to move into the L-shaped tube. At this time, the hydraulic oil in the connecting rod and the fixed box can be squeezed. Under the action of the hydraulic pressure, the piston can be pushed to move along the fixed tube in the direction away from the fixed box. At the same time, the push pin is driven to slide in the slide groove through the support plate and the second connecting block, thereby pushing the pointer to rotate clockwise along the second rotating shaft. At this time, the scale change on the arc scale plate indicated by the pointer can be observed by the visual sensor to determine whether the spline sleeve is shaking. If the shaking amplitude is large, an external alarm will be used to alarm, thereby ensuring its use effect and life, and being safer and more reliable.

[0024] (3) This universal joint transmission shaft and rotary tiller, by providing a heat dissipation mechanism, etc., can drive the roller to rotate synchronously when the spline sleeve rotates during use. At the same time, the active bevel gear is driven to rotate through the connecting shaft. When the active bevel gear rotates, it can drive the driven bevel gear to rotate, and then drive the rotating shaft and the fan to rotate, so that the blowing operation can be performed. At the same time, the exhaust operation is performed through the support pipe, so that the air in the shield assembly can enter the arc-shaped cover through the air inlet hole. Since the first partition and the second partition are passed through to the outside, and at the same time, the interior is filled with coolant, and the air passes through the first partition and the second partition in turn, the air flow path can be increased, so that the air can have a good cooling effect. The cooled air can pass through the support pipe and the telescopic pipe, and blown onto the surface of the spline shaft through the working pipe, which can have a good cooling effect on the spline shaft, ensuring the effect of the spline shaft and the spline sleeve being used together, thereby ensuring the use effect and life of the universal joint transmission shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the universal joint shaft body in the present invention in use;

[0026] Figure 2 This is a schematic diagram of the overall structure of the universal joint transmission shaft body in the present invention;

[0027] Figure 3 This is a schematic diagram of the overall structure of the universal joint shaft body of the present invention from another perspective;

[0028] Figure 4 It is a partial cross-sectional structural schematic diagram of the shield assembly in the present invention;

[0029] Figure 5 A schematic diagram of a partial cross-sectional structure of the shield assembly of the present invention from another perspective;

[0030] Figure 6 Schematic diagram of the structure of the arc cover in the present invention;

[0031] Figure 7 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 8 for Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0033] Figure 9 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0034] Figure 10 for Figure 5 Schematic diagram of the enlarged structure at D in the middle;

[0035] Figure 11 for Figure 10 Schematic diagram of the enlarged structure at E in the middle;

[0036] Figure 12 for Figure 11 Schematic diagram of the enlarged structure at F in the middle.

[0037] In the figure: 101, driving shaft; 102, driven shaft; 103, universal joint; 104, spline shaft; 105, spline sleeve; 201, connecting rod; 202, fixed box; 203, annular tube; 204, U-shaped plate; 205, first rotating shaft; 206, roller; 207, fixed tube; 208, piston; 301, sleeve rod; 302, sleeve; 303, spring; 401, L-shaped tube; 402, moving rod; 403, first connecting block; 501, second rotating shaft; 502, pointer; 503, bracket; 504, arc scale plate; 505, L-shaped block; 506, visual sensor; 507, connecting plate; 601 , slide; 602, support plate; 603, second connecting block; 604, push pin; 701, support tube; 702, telescopic tube; 703, working tube; 704, arc cover; 705, air inlet; 706, first partition; 707, second partition; 708, fixed block; 709, rotating shaft; 710, fan; 801, driven bevel gear; 802, connecting shaft; 803, driving bevel gear; 901, first mounting block; 902, second mounting block; 903, bolt; 10, rigid cover; 11, flange; 12, telescopic cover; 14, fixed ring; 15, rotating ring; 16, tractor; 17, rotary tillage module. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] See also Figures 1-12 The present invention provides a universal transmission shaft, including a shield assembly sleeved on the side wall of the universal transmission shaft body, the universal transmission shaft body including a driving shaft 101, a driven shaft 102 and two universal joints 103, and a spline shaft 104 and a spline sleeve 105 are provided between the two universal joints 103, and the shield assembly includes:

[0040] Two fixing rings 14 are fixedly sleeved on the side walls of the spline shaft 104;

[0041] Two rigid covers 10 are mounted on the side walls of the universal joint 103 and are rotatably connected to the side walls of the fixed ring 14 via a rotating ring 15;

[0042] Two flanges 11 are fixed to the side walls of each rigid cover 10;

[0043] The telescopic cover 12 is detachably connected between the two rigid covers 10 through a mounting mechanism and is sleeved on the side wall of the universal joint shaft body;

[0044] A detection mechanism is provided in the shield assembly and is used to detect the shaking of the spline sleeve 105;

[0045] The heat dissipation mechanism is provided in the shield assembly and is used for blowing air to dissipate heat for the spline shaft 104 .

[0046] The detection mechanism includes a connecting rod 201 fixedly connected to the inner wall of the rigid cover 10, and the side wall of the connecting rod 201 is fixedly connected to an annular tube 203, and the side wall of the annular tube 203 is fixedly inserted with a plurality of fixed boxes 202, and the fixed boxes 202 and the annular tube 203 are filled with hydraulic oil, and the side wall of the fixed box 202 close to the spline sleeve 105 is connected to a U-shaped plate 204 through a telescopic mechanism, and the side wall of the U-shaped plate 204 is rotatably connected to a roller 206 through a first rotating shaft 205, and the rollers 206 are provided in an odd number and are asymmetrically arranged, and the side wall of the fixed box 202 is fixedly inserted in a fixed tube 207, and a piston 208 is slidably connected in the fixed tube 207, and the side wall of the U-shaped plate 204 is provided with a The fixed box 202 is provided with an extrusion mechanism for squeezing the hydraulic oil in the fixed box 202, and the side wall of the fixed box 202 is provided with a detection component for detecting the movement of the piston 208, which can provide good protection for the universal joint shaft body, avoid contamination by impurities such as dust, weeds and water stains, and ensure its use effect and life; it is convenient to detect the shaking amplitude of the spline sleeve 105. If the shaking amplitude is large, an external alarm will be used to alarm, ensuring its use effect and life, and it is safer and more reliable; it can have a good cooling effect on the spline shaft 104, ensure the effect of the coordinated use of the spline shaft 104 and the spline sleeve 105, thereby ensuring the use effect and life of the universal joint shaft body.

[0047] The extrusion mechanism includes an L-shaped tube 401 fixedly connected to the side wall of the fixed box 202, and a moving rod 402 is inserted into the L-shaped tube 401. A first connecting block 403 is fixedly connected between the lower end of the moving rod 402 and the U-shaped plate 204. When the spline sleeve 105 shakes abnormally on the spline shaft 104, it can push one or more rollers 206 to move toward the fixed box 202. At the same time, the moving rod 402 is driven to move into the L-shaped tube 401 through the first connecting block 403. At this time, the hydraulic oil in the connecting rod 201 and the fixed box 202 can be squeezed.

[0048] The detection component includes a connecting plate 507 fixedly connected to the side wall of the fixed box 202, and the top of the connecting plate 507 is rotatably connected to the pointer 502 through the second rotating shaft 501, the top of the connecting plate 507 is fixedly connected to the bracket 503, and the side wall of the bracket 503 is fixedly connected to the arc-shaped scale plate 504, the top of the bracket 503 is fixedly connected to the L-shaped block 505, and the top of the L-shaped block 505 is fixedly inserted with a visual sensor 506, the visual sensor 506 can be electrically connected to an external alarm, the rotation of the pointer 502 is driven by the pushing mechanism, and the pointer 502 is pushed to rotate by the pushing mechanism. At this time, by observing the scale changes on the arc-shaped scale plate 504 indicated by the pointer 502 through the visual sensor 506, it can be determined whether the spline sleeve 105 is shaking. If the shaking amplitude is large, an alarm is sounded through the external alarm to ensure its effectiveness and life, and it is safer and more reliable.

[0049] The pushing mechanism includes a slide groove 601 opened at the top of the pointer 502, and the end of the piston 208 is fixedly connected to the support plate 602, the side wall of the support plate 602 is fixedly connected to the second connecting block 603, and the bottom of the second connecting block 603 is fixedly connected to the push pin 604, and the push pin 604 is inserted in the slide groove 601. Under the action of hydraulic pressure, it can push the piston 208 to move along the fixed tube 207 away from the fixed box 202. At the same time, the push pin 604 is driven to slide in the slide groove 601 through the support plate 602 and the second connecting block 603, thereby pushing the pointer 502 to rotate clockwise along the second rotating shaft 501.

[0050] The telescopic mechanism includes two symmetrically arranged sleeves 302 fixedly connected to the side walls of the fixed box 202, and a sleeve rod 301 is inserted into each sleeve 302. The lower end of the sleeve rod 301 is fixed to the U-shaped plate 204, and a spring 303 is sleeved on the side wall of each sleeve 302 to ensure that the roller 206 can be against the side wall of the spline sleeve 105.

[0051] The heat dissipation mechanism includes a support tube 701 fixedly connected to the side wall of the connecting rod 201, and the lower end of the support tube 701 is fixedly connected to the telescopic tube 702, the lower end of the telescopic tube 702 is fixedly connected to the working tube 703, and the inner wall of the working tube 703 is fixedly connected to the fixed block 708, the bottom of the fixed block 708 is rotatably connected to the fan 710 through the rotating shaft 709, and the rotation of the rotating shaft 709 is driven by the driving mechanism, the upper end of the support tube 701 is fixedly connected to the arc cover 704, and the two opposite side walls of the arc cover 704 are provided with a plurality of air inlet holes 705, the arc cover 704 is fixedly connected with a first partition plate 706 and a second partition plate 707 with a hollow setting, and the first partition plate 706 and the second partition plate 707 are arranged to pass through the side wall of the telescopic cover 12, the first partition plate 706 and the second partition plate 707 are filled with coolant, and are driven The mechanism drives the rotating shaft 709 and the fan 710 to rotate, so that the blowing operation can be performed. At the same time, the exhaust operation is performed through the support tube 701, so that the air in the shield assembly can enter the arc cover 704 through the air inlet hole 705. Since the first baffle 706 and the second baffle 707 pass through to the outside, at the same time, the interior is filled with coolant, and the air passes through the first baffle 706 and the second baffle 707 in turn, which can increase the air flow path, thereby having a good cooling effect on the air. The cooled air can pass through the support tube 701 and the telescopic tube 702, and be blown onto the surface of the spline shaft 104 through the working tube 703, which can have a good cooling effect on the spline shaft 104, ensuring the effect of the coordinated use of the spline shaft 104 and the spline sleeve 105, thereby ensuring the use effect and life of the universal joint transmission shaft body.

[0052] The driving mechanism includes a driven bevel gear 801 fixedly connected to the upper end of the rotating shaft 709, and the side wall of the first rotating shaft 205 is fixedly connected to a connecting shaft 802, which passes through the working tube 703 and is fixedly connected to a driving bevel gear 803, and the driving bevel gear 803 is meshed with the driven bevel gear 801. When the spline sleeve 105 rotates, it can drive the roller 206 to rotate synchronously. At the same time, the driving bevel gear 803 is driven to rotate through the connecting shaft 802. When the driving bevel gear 803 rotates, it can drive the driven bevel gear 801 to rotate, and then drive the rotating shaft 709 and the fan 710 to rotate.

[0053] The mounting mechanism includes a first mounting block 901 fixedly connected to the side wall of the rigid cover 10 and arranged in an array, and a second mounting block 902 fixedly connected to the side wall of the telescopic cover 12 and arranged in an array, and the second mounting block 902 and the first mounting block 901 are detachably connected by bolts 903, which facilitates the installation and disassembly of the telescopic cover 12 and the rigid cover 10.

[0054] A rotary tiller includes a tractor 16 and a rotary tillage module 17. The tractor 16 and the rotary tillage module 17 are well-known technologies in the technical field and will not be described in detail here. It also includes a universal joint transmission shaft, and two flanges 11 are fixed to the tractor 16 and the rotary tillage module 17 respectively by connecting bolts.

[0055] Working principle: When in use, the driving shaft 101 is connected to the output end of the tractor 16, and at the same time, the driven shaft 102 is connected to the input end of the rotary tillage module 17, and the two flanges 11 are fixed on the tractor 16 and the rotary tillage module 17 respectively. Through the setting of the rigid cover 10 and the telescopic cover 12, the universal joint drive shaft body can be well protected to avoid contamination by impurities such as dust, weeds and water stains, thereby ensuring its effectiveness and life.

[0056] Under the action of the spring 303, the roller 206 can be abutted against the side wall of the spline sleeve 105. When the spline sleeve 105 rotates, the roller 206 can be driven to rotate. When the spline sleeve 105 shakes abnormally on the spline shaft 104, one or more rollers 206 can be pushed to move toward the fixed box 202. At the same time, the moving rod 402 is driven to move into the L-shaped tube 401 through the first connecting block 403. At this time, the hydraulic oil in the connecting rod 201 and the fixed box 202 can be squeezed, and under the action of the hydraulic pressure, the movable The plug 208 moves along the fixed tube 207 in the direction away from the fixed box 202. At the same time, the push pin 604 is driven to slide in the slide groove 601 through the support plate 602 and the second connecting block 603, thereby pushing the pointer 502 to rotate clockwise along the second rotating shaft 501. At this time, by observing the scale changes on the arc-shaped scale plate 504 indicated by the pointer 502 through the visual sensor 506, it can be determined whether the spline sleeve 105 is shaking. If the shaking amplitude is large, an external alarm will be used to alarm, thereby ensuring its effectiveness and lifespan, and making it safer and more reliable.

[0057] When the spline sleeve 105 rotates, it can drive the roller 206 to rotate synchronously. At the same time, the driving bevel gear 803 is driven to rotate through the connecting shaft 802. When the driving bevel gear 803 rotates, it can drive the driven bevel gear 801 to rotate, and then drive the rotating shaft 709 and the fan 710 to rotate, so that the blowing operation can be performed. At the same time, the air is exhausted through the support tube 701, so that the air in the shield assembly can enter the arc cover 704 through the air inlet hole 705. Due to the first baffle 706 and the second baffle 707 penetrates to the outside, and at the same time, its interior is filled with coolant, and the air passes through the first baffle 706 and the second baffle 707 in sequence, which can increase the air flow path, thereby having a good cooling effect on the air. The cooled air can pass through the support tube 701 and the telescopic tube 702, and blow onto the surface of the spline shaft 104 through the working tube 703, which can have a good cooling effect on the spline shaft 104, ensuring the effect of the coordinated use of the spline shaft 104 and the spline sleeve 105, thereby ensuring the use effect and life of the universal joint transmission shaft body.

[0058] The standard parts used in the present invention can all 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 conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0059] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A universal transmission shaft, comprising a shield assembly sleeved on the side wall of a universal transmission shaft body, wherein the universal transmission shaft body comprises a driving shaft (101), a driven shaft (102) and two universal joints (103), and a spline shaft (104) and a spline sleeve (105) are provided between the two universal joints (103), characterized in that: The shield assembly comprises: Two fixing rings (14) fixedly sleeved on the side walls of the spline shaft (104); Two rigid covers (10) are sleeved on the side walls of the universal joint (103) and are rotatably connected to the side walls of the fixed ring (14) via a rotating ring (15); Two flanges (11) are respectively fixed to the side walls of each rigid cover (10); A telescopic cover (12) is detachably connected between the two rigid covers (10) via a mounting mechanism and is sleeved on the side wall of the universal joint shaft body; A detection mechanism is provided in the shield assembly and is used to detect the shaking of the spline sleeve (105); A heat dissipation mechanism is provided in the shield assembly and is used for blowing air to dissipate heat for the spline shaft (104); The detection mechanism comprises a connecting rod (201) fixedly connected to the inner side wall of the rigid cover (10), and the side wall of the connecting rod (201) is fixedly connected to an annular tube (203), and the side wall of the annular tube (203) is fixedly inserted with a plurality of fixed boxes (202), the fixed boxes (202) and the annular tube (203) are filled with hydraulic oil, and the side wall of the fixed box (202) close to the spline sleeve (105) is connected to a U-shaped plate (204) through a telescopic mechanism, and the U-shaped plate ( The side wall of the U-shaped plate (204) is rotatably connected to a roller (206) via a first rotating shaft (205), and the side wall of the fixed box (202) is fixedly inserted into a fixed tube (207), a piston (208) is slidably connected in the fixed tube (207), the side wall of the U-shaped plate (204) is provided with an extrusion mechanism for squeezing the hydraulic oil in the fixed box (202), and the side wall of the fixed box (202) is provided with a detection component for detecting the movement of the piston (208); The extrusion mechanism comprises an L-shaped tube (401) fixedly connected to the side wall of the fixed box (202), a moving rod (402) is inserted into the L-shaped tube (401), and a first connecting block (403) is fixedly connected between the lower end of the moving rod (402) and the U-shaped plate (204); The detection assembly comprises a connecting plate (507) fixedly connected to the side wall of the fixed box (202), and the top of the connecting plate (507) is rotatably connected to a pointer (502) via a second rotating shaft (501), the top of the connecting plate (507) is fixedly connected to a bracket (503), and the side wall of the bracket (503) is fixedly connected to an arc-shaped scale plate (504), the top of the bracket (503) is fixedly connected to an L-shaped block (505), and the top of the L-shaped block (505) is fixedly inserted with a visual sensor (506), and the rotation of the pointer (502) is driven by a driving mechanism; The pushing mechanism includes a slide groove (601) provided on the top of the pointer (502), and the end of the piston (208) is fixedly connected to a support plate (602), the side wall of the support plate (602) is fixedly connected to a second connecting block (603), the bottom of the second connecting block (603) is fixedly connected to a pushing pin (604), and the pushing pin (604) is inserted into the slide groove (601); The heat dissipation mechanism comprises a support tube (701) fixedly connected to the side wall of the connecting rod (201), and the lower end of the support tube (701) is fixedly connected to a telescopic tube (702), the lower end of the telescopic tube (702) is fixedly connected to a working tube (703), and the inner side wall of the working tube (703) is fixedly connected to a fixed block (708), the bottom of the fixed block (708) is rotatably connected to a fan (710) via a rotating shaft (709), and the rotation of the rotating shaft (709) is driven by a driving mechanism. Driven, the upper end of the support tube (701) is fixedly connected to a curved cover (704), and two opposite side walls of the curved cover (704) are provided with a plurality of air inlet holes (705), the curved cover (704) is fixedly connected to a first baffle (706) and a second baffle (707) with a hollow arrangement, and the first baffle (706) and the second baffle (707) are arranged to pass through the side walls of the telescopic cover (12), and the first baffle (706) and the second baffle (707) are filled with cooling liquid; The driving mechanism comprises a driven bevel gear (801) fixedly connected to the upper end of the rotating shaft (709), and a connecting shaft (802) is fixedly connected to the side wall of the first rotating shaft (205), the connecting shaft (802) penetrates into the working tube (703) and is fixedly connected to the driving bevel gear (803), and the driving bevel gear (803) is meshed with the driven bevel gear (801).

2. The universal joint transmission shaft according to claim 1, characterized in that: The telescopic mechanism comprises two symmetrically arranged sleeves (302) fixedly connected to the side walls of the fixed box (202), and a sleeve rod (301) is inserted into each sleeve (302), the lower end of the sleeve rod (301) is fixed to the U-shaped plate (204), and a spring (303) is sleeved on the side wall of each sleeve (302).

3. The universal joint transmission shaft according to claim 1, characterized in that: The mounting mechanism comprises a plurality of first mounting blocks (901) arranged in an array and fixedly connected to the side wall of the rigid cover (10), and a plurality of second mounting blocks (902) arranged in an array and fixedly connected to the side wall of the telescopic cover (12), and the second mounting blocks (902) and the first mounting blocks (901) are detachably connected via bolts (903).

4. A rotary tiller, comprising a tractor (16) and a rotary tillage module (17), characterized in that: It also includes a universal joint shaft as claimed in any one of claims 1 to 3.

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