Double bracket universal joint

Abstract

The present invention relates to a universal joint, and more particularly to a double-bracket universal joint, comprising a circular ring, an inner bracket, an outer bracket, a rotating shaft, and a housing device, wherein the circular ring is mounted on the top of the inner bracket, the inner bracket is rotatably inserted into the rotating shaft, the inner bracket comprises inner bracket 1 and inner bracket 2, the rotating shaft comprises a driving shaft and a driven shaft, the tail end of inner bracket 1 is rotatably inserted into the driving shaft, the tail end of inner bracket 2 is rotatably inserted into the driven shaft, inner bracket 1 and inner bracket 2 are connected by a circular ring buckle at the top, the outer bracket comprises outer bracket 1 and outer bracket 2, the driving shaft is rotatably connected to outer bracket 1, the driven shaft is rotatably connected to outer bracket 2, outer bracket 1 and outer bracket 2 are respectively provided with symmetrical connecting shafts, and outer bracket 1 and outer bracket 2 are respectively connected to the housing device via connecting shafts. The purpose of the present invention is to provide a double-bracket universal joint, wherein the driving shaft and the driven shaft of the universal joint can move at a constant speed around the same center of a circle, and the angle formed by the driving shaft and the driven shaft of the universal joint is large.

Description

Technical Field

[0001] The invention relates to a universal coupling, in particular to a double-bracket universal joint. Background Art

[0002] A universal joint, also known as a universal joint, is a device that enables variable-angle power transmission and is used in locations where the direction of the driveline needs to be changed. It serves as the "joint" component of the universal joint system in automotive drive systems (such as the Dongfanghong 1304, 1504, and 1804 tractors, and Lovol). The combination of a universal joint and the drive shaft is called a universal joint transmission. In front-engine, rear-wheel-drive vehicles, the universal joint is installed between the transmission output shaft and the input shaft of the drive axle's final drive unit. In front-engine, front-wheel-drive vehicles, the front wheels and the drive axle are connected by a cross universal joint, which provides both rotation and linkage. Some front-wheel-drive, front-steering vehicles on the market have narrow turning angles and limited maneuverability. Therefore, universal joints are used to increase turning angles and enhance maneuverability.

[0003] Currently, there are cross universal joints, duplex universal joints, ball cage universal joints, and ball fork universal joints on the market. In a duplex universal joint, although the driving and driven shafts move at equal speeds, they do not share the same center point. In a cross universal joint, although the driving and driven shafts share the same center point, they move at different speeds and the angle between them is small. In ball cage and ball fork universal joints, although the driving and driven shafts share the same center point and move at equal speeds, they have the disadvantage of a small angle between the two shafts, which leads to increased wear and a shorter service life.

[0004] The universal joints used in most large tractors today are double cross joints, which have the following disadvantages: First, when front-wheel drive tractors are used in agricultural fields, the turning angle will obviously not be large enough when turning at the end of the field; second, due to the unevenness of the farmland, the height of the cross joint rotation and lifting does not meet the ruggedness of the field. If the lifting height is too high, the cross joint will wear and reduce the service life of the cross joint. Most forklifts are also front-wheel drive and rear-steer. Therefore, when the forklift is operating, the rear wheels of the forklift have a particularly large turning angle. When the rear wheels of the forklift turn at an angle greater than 70 degrees, especially 80 degrees, the rear wheels will obviously slide forward or backward, affecting the stability of the forklift. Summary of the Invention

[0005] In view of the above-mentioned deficiencies, the object of the present invention is to provide a double-bracket universal joint, the driving shaft and the driven shaft of which can move at a constant speed around the same center of a circle, and the angle formed by the driving shaft and the driven shaft of the universal joint is large.

[0006] The present invention is achieved through the following technical solution: a double-bracket universal joint, comprising a ring, an inner bracket, an outer bracket, a rotating shaft and an outer shell device, characterized in that the ring is installed at the top of the inner bracket, the inner bracket can be rotatably inserted in the rotating shaft, the inner bracket comprises inner bracket one and inner bracket two, the rotating shaft comprises a driving shaft and a driven shaft, the tail end of inner bracket one can be rotatably inserted in the driving shaft, the tail end of inner bracket two can be rotatably inserted in the driven shaft, the inner bracket one and the inner bracket two are connected by a ring buckle at the top, the outer bracket comprises outer bracket one and outer bracket two, the driving shaft can be rotatably connected to outer bracket one, the driven shaft can be rotatably connected to outer bracket two, symmetrical connecting shafts are respectively provided on outer bracket one and outer bracket two, and outer bracket one and outer bracket two are respectively connected to the outer shell device through connecting shafts.

[0007] Preferably, the housing device is an integral housing device or a split housing device.

[0008] Preferably, the split housing device includes two hollow spline shafts and spline sleeves adapted to the spline shafts, the spline shaft is provided with a circular hole adapted to the connecting shaft, a connecting bearing is installed in the circular hole, the outer bracket extends into the connecting bearing through the connecting shaft to rotate the connecting spline shaft, the two spline shafts are respectively slidably connected to the spline sleeves, and the two ends of the spline sleeves are closed by closing parts made of soft material, and the closing parts are provided with holes for the driving shaft and the driven shaft to pass through.

[0009] Preferably, the integral shell device includes a hollow cylinder with four fixed plates on it, each fixed plate is provided with a second circular hole, a connecting bearing is installed in the second circular hole, and the outer bracket extends into the connecting bearing through the connecting shaft to rotate and connect the cylinder; when the integral shell device is adopted, the inner bracket one is telescopically rotatably connected to the active shaft, and the inner bracket two is telescopically rotatably connected to the driven shaft.

[0010] Preferably, a groove is provided in the outer bracket, and fixing columns are provided on the upper and lower sides of the rotating shaft. The rotating shaft is embedded in the groove through the fixing columns and is rotatably connected to the outer bracket.

[0011] The beneficial effects of the present invention are as follows: 1. The driving shaft and driven shaft of the universal joint of the present invention can be linked around the same center point, and the two shafts rotate at the same speed; 2. The driving shaft and driven shaft of the universal joint designed by the present invention can form an arbitrary angle; 3. The universal joint designed by the present invention has an ingenious structure and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 It is a side structural schematic diagram of the present invention;

[0014] Figure 3It is a schematic structural diagram of the external support of the present invention;

[0015] Figure 4 It is a structural schematic diagram of the rotating shaft of the present invention;

[0016] Figure 5 Schematic diagram of the cross-sectional structure of the rotating shaft of the present invention;

[0017] Figure 6 It is a partial structural schematic diagram of the split housing device of the present invention;

[0018] Figure 7 It is a structural schematic diagram of the spline shaft of the present invention;

[0019] Figure 8 It is a structural schematic diagram of the spline sleeve of the present invention;

[0020] Figure 9 It is a structural schematic diagram of the split housing device of the present invention;

[0021] Figure 10 It is a structural schematic diagram of the overall housing device of the present invention;

[0022] Figure 11 It is a structural schematic diagram of the cylinder of the present invention;

[0023] In the accompanying drawings, 1 is an inner bracket, 101 is an inner bracket one, 102 is an inner bracket two, 2 is an outer bracket, 201 is an outer bracket one, 202 is an outer bracket two, 3 is a rotating shaft, 301 is a driving shaft, 302 is a driven shaft, 4 is a fixing column, 5 is a groove, 6 is a connecting shaft, 7 is a spline shaft, 8 is a spline sleeve, 9 is a circular hole one, 10 is a closing member, 11 is a cylinder, 12 is a fixing plate, 13 is a circular hole two, and 14 is a circular ring. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-11 The present invention is further described with reference to the accompanying drawings and specific embodiments.

[0025] Example 1:

[0026] like Figure 1-4 As shown, a double-bracket universal joint includes a ring 14, an inner bracket, an outer bracket, a rotating shaft 3 and a housing device. The ring 14 is mounted on the top of the inner bracket by welding. The inner bracket is rotatably inserted into the rotating shaft 3 through a bearing and will not slide out of the rotating shaft 3. The rotating shaft 3 is rotatably connected to the outer bracket, that is, a groove 5 is provided on the outer bracket, and fixing columns 4 are provided on the upper and lower sides of the rotating shaft 3. The rotating shaft 3 is rotatably connected to the outer bracket through the fixing shaft embedded in the groove 5;

[0027] The inner bracket includes an inner bracket 101 and an inner bracket 2 102 with the same structure. The rotating shaft 3 includes a driving shaft 301 and a driven shaft 302 with the same structure. The driving shaft 301 and the driven shaft 302 are both hollow shafts. The outer bracket includes an outer bracket 1 201 and an outer bracket 202 with the same structure.

[0028] The inner bracket 101 and the inner bracket 2 102 are connected by a ring 14 at the top. The tail end of the inner bracket 101 is rotatably inserted in the driving shaft 301 through a bearing. The driving shaft 301 is rotatably connected to the outer bracket 1 201. The tail end of the inner bracket 2 102 is rotatably inserted in the driven shaft 302 through a bearing. The driven shaft 302 is rotatably connected to the outer bracket 2 202. Two symmetrical connecting shafts 6 are respectively provided on the outer bracket 1 201 and the outer bracket 2 202. The outer bracket 1 201 is connected to the outer shell device through its two connecting shafts 6, and the outer bracket 2 202 is also connected to the outer shell device through its connecting shaft 6.

[0029] The shell device adopts a split shell device.

[0030] like Figure 6-9 As shown, the split housing device includes two hollow spline shafts 7 and spline sleeves 8 adapted to the spline shafts 7. The spline shafts 7 are provided with two circular holes 9 adapted to the connecting shafts 6. The circular holes 9 are equipped with connecting shaft 6 bearings. The outer bracket extends into the connecting shaft 6 bearings through the connecting shaft 6 to rotate and connect the spline shaft 7.

[0031] That is, the outer bracket 1 201 is connected to a corresponding spline shaft 7, and the outer bracket 2 202 is connected to a corresponding spline shaft 7. The two spline shafts 7 are slidably connected through the spline sleeve 8, that is, the spline shaft 7 can slide back and forth in the spline sleeve 8, and the two ends of the spline sleeve 8 are closed by closing members 10 made of soft material. The purpose of the closure is to prevent the spline shaft 7 from slipping out of the spline sleeve 8. The closing member 10 is provided with holes for the driving shaft 301 and the driven shaft 302 to pass through. The purpose of using soft material is to enable the connection between the driving shaft 301 or the driven shaft 302 and the closing member 10 to be lifted and rotated upward and downward or left and right.

[0032] The connecting shaft 6 and the connecting bearing are rotatably and non-detachably connected via a key, and their function is to prevent the outer shell device from falling off from the outer bracket without affecting the outer bracket's rotational connection to the outer shell device.

[0033] When the split shell device is used, when the driving shaft 301 moves to the left or right, the driving shaft 301 is linked with the driven shaft 302 through the rotational connection with the outer bracket and the sliding connection between the spline shaft 7 and the spline sleeve 8. When the driving shaft 301 is lifted up or down, the driving shaft 301 is linked with the driven shaft 302 through the rotational connection between the outer bracket and the spline shaft 7 and the sliding connection between the spline shaft 7 and the spline sleeve 8. That is, during the movement, the sliding connection between the spline shaft 7 and the spline sleeve 8 cooperates with the change of the angle between the inner bracket 101 and the inner bracket 2 102.

[0034] Example 2:

[0035] like Figure 1-4 As shown, a double-bracket universal joint includes a ring 14, an inner bracket, an outer bracket, a rotating shaft 3 and a housing device. The ring 14 is mounted on the top of the inner bracket by welding. The inner bracket is rotatably inserted into the rotating shaft 3 through a bearing and will not slide out of the rotating shaft 3. The rotating shaft 3 is rotatably connected to the outer bracket, that is, a groove 5 is provided on the outer bracket, and fixing columns 4 are provided on the upper and lower sides of the rotating shaft 3. The rotating shaft 3 is rotatably connected to the outer bracket through the fixing shaft embedded in the groove 5;

[0036] The inner bracket includes an inner bracket 101 and an inner bracket 2 102 with the same structure. The rotating shaft 3 includes a driving shaft 301 and a driven shaft 302 with the same structure. The driving shaft 301 and the driven shaft 302 are both hollow shafts. The outer bracket includes an outer bracket 1 201 and an outer bracket 202 with the same structure.

[0037] The inner bracket 101 and the inner bracket 2 102 are connected by a ring 14 at the top. The tail end of the inner bracket 101 is rotatably inserted in the driving shaft 301 through a bearing. The driving shaft 301 is rotatably connected to the outer bracket 1 201. The tail end of the inner bracket 2 102 is rotatably inserted in the driven shaft 302 through a bearing. The driven shaft 302 is rotatably connected to the outer bracket 2 202. Two symmetrical connecting shafts 6 are respectively provided on the outer bracket 1 201 and the outer bracket 2 202. The outer bracket 1 201 is connected to the outer shell device through its two connecting shafts 6, and the outer bracket 2 202 is also connected to the outer shell device through its connecting shaft 6.

[0038] The shell device adopts an integral shell device.

[0039] like Figure 10As shown, the overall shell device includes a hollow cylinder 11, and four fixed plates 12 are provided on the cylinder 11. Each fixed plate 12 is provided with a second circular hole 13, and a connecting shaft 6 bearing is installed in the second circular hole 13. The outer bracket 1 201 and the outer bracket 2 202 are respectively extended into the connecting shaft 6 bearing through the connecting shaft 6 to rotate and connect the cylinder 11; it should be noted that when the overall shell device is adopted, the inner bracket is telescopically rotatably connected to the rotating shaft 3, that is, the inner bracket is rotatably connected to the rotating shaft 3 through the bearing and can be extended and retracted back and forth along the center line of the rotating shaft 3 in the rotating shaft 3. In order to prevent the inner bracket from slipping out of the rotating shaft 3, a baffle should be connected after the tail end of the inner bracket is extended into the bearing of the rotating shaft 3, that is, although the inner bracket is telescopically sleeved in the rotating shaft 3, it will not completely slide out of the rotating shaft 3.

[0040] When the integral shell device is used, when the driving shaft 301 moves to the left or right, the driving shaft 301 is linked with the driven shaft 302 through the rotational connection with the outer bracket and the telescopic rotational connection between the outer bracket and the inner bracket. When the driving shaft 301 is lifted up or down, the driving shaft 301 is linked with the driven shaft 302 through the rotational connection between the outer bracket and the cylinder 11 and the telescopic rotational connection between the outer bracket and the inner bracket. That is, during the movement, the angle between the inner bracket 101 and the inner bracket 2 102 changes through the sliding fit of the inner bracket in the rotating shaft 3.

[0041] The dual-bracket universal joint of the present invention moves at a constant speed around the same center point, has a large included angle, and has a wide range of applications.

[0042] The above-mentioned specific embodiments are merely specific examples of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may utilize the above-mentioned technical content to modify or modify the above-mentioned embodiments into equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above-mentioned embodiments based on the technical essence of the present invention, without departing from the technical principles of the present invention, shall fall within the scope of patent protection of the present invention.

Claims

1. A double-bracket universal joint, comprising a ring, an inner bracket, an outer bracket, a rotating shaft and a housing device, characterized in that: The ring is installed at the top of the inner bracket, and the inner bracket is rotatably inserted in the rotating shaft. The inner bracket includes inner bracket one and inner bracket two, and the rotating shaft includes a driving shaft and a driven shaft. The tail end of inner bracket one can be rotatably inserted in the driving shaft, and the tail end of inner bracket two can be rotatably inserted in the driven shaft. The inner bracket one and the inner bracket two are connected by the circular ring buckle at the top. The outer bracket includes outer bracket one and outer bracket two. The driving shaft is rotatably connected to the outer bracket one, and the driven shaft is rotatably connected to the outer bracket two. The outer bracket one and the outer bracket two are respectively provided with symmetrical connecting shafts. The outer bracket one and the outer bracket two are respectively connected to the outer shell device through the connecting shaft. The outer shell device adopts one of an integral outer shell device or a split outer shell device; the split outer shell device includes two hollow spline shafts and a spline sleeve adapted to the spline shaft, and the spline shaft is provided with a spline sleeve adapted to the spline shaft. The connecting shaft is adapted to have a circular hole 1, in which a connecting bearing is installed. The outer bracket extends into the connecting bearing through the connecting shaft to rotate and connect the spline shaft. The two spline shafts are respectively slidably connected to the spline sleeves. The two ends of the spline sleeves are closed by closing members made of soft material. The closing members are provided with holes for the driving shaft and the driven shaft to pass through. The integral shell device includes a hollow cylinder, on which 4 fixing plates are provided, each fixing plate is provided with a circular hole 2, in which a connecting bearing is installed. The outer bracket extends into the connecting bearing through the connecting shaft to rotate and connect the cylinder; when the integral shell device is adopted, the inner bracket 1 is telescopically rotatably connected to the driving shaft, and the inner bracket 2 is telescopically rotatably connected to the driven shaft. A groove is provided in the outer bracket, and fixed columns are provided on the upper and lower sides of the rotating shaft. The rotating shaft is embedded in the groove through the fixed columns to be rotatably connected to the outer bracket.

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