JP3091670U - Cross joint assembly of universal joint - Google Patents

Abstract

(57) [Summary] [Problem] By reliably lubricating each bearing,
It is also possible to prevent the bearing life from being shortened and to prevent the bearing from being seized or galling due to forgetting to lubricate one or more bearings artificially. SOLUTION: In a universal joint cross-shaft assembly comprising a cross-shaft 20 having two perpendicular axes and a bearing 21 provided on the cross-shaft, the cross-shaft 20 is
The shafts are provided with coaxial oil holes 20a and 20b,
0b at the end face of the cross shaft 20 where both ends are located.
0c, an axially movable plug 27 is provided in the tapered portion 20c, an oil supply portion 26 for directly supplying oil to the inside of the bearing 21 is provided in the bearing 21, and oil holes 20a and 20a are provided.
The lubrication unit 25 is provided on the cross shaft 20 for moving the stopper 27 by the fluid pressure due to the oil supply through 0b to open a part of the oil holes 20a and 20b to supply oil to the inside of the bearing 21.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a universal joint cross shaft assembly.

[0002]

[Prior art]

  FIG. 5 is a side view showing the structure of the universal joint, and 1 is a universal joint. The joint 2, the sleeve 3, and the sleeve 3 are provided coaxially with the sleeve 2, On the other hand, a spline 4 which is movable in the axial direction, is a sleeve fixed to the end of the sleeve 2. Sleeve yoke, 5 is a spline yoke fixed to the end of the spline 3, and 6 is the first A yoke 7, a second yoke 8, and a sleeve yoke 4 and a first yoke 6 are rotatable. A first cruciform shaft assembly 9 which supports the shaft and connects the two, is a spline yoke 5 and a second yoke. 2 shows a second cross shaft assembly that rotatably supports the ark 7 and connects the two.

[0003]   FIG. 6 is an explanatory view showing the structure of a conventional cross shaft assembly, and FIG. 6 (a) is a plan view. FIG. 6B is a side view. In FIG. 6, 10 has four cylindrical shafts. Cross shaft, 11 is a cylindrical bearing with a bottom attached to each shaft of the cross shaft 10, and 12 is a bearing A roller portion installed between the inner peripheral surface of 11 and the outer peripheral surface of each shaft portion of the cross shaft 10, Reference numeral 13 denotes a bottom installed between the bottom surface of the bearing 11 and the end surface of each shaft portion of the cross shaft 10. A plate 14 is a seal that seals the gap between the bearing 11 and the shaft.

[0004]   The central axes of the two shaft parts of the two shaft parts facing each other on the cross shaft 10 coincide with each other. The two central axes are vertical and intersect each other. Also, two central axes Oil holes 10a and 10b are formed coaxially with the oil holes 1a and 10b on the end faces of the four shafts. Openings at both ends of 0a and 10b are formed, and the te is inclined toward the intersection of the central axes. Super surface is formed. Further, the oil holes 10a and 10b are provided at the center of the cross shaft 10. Is formed in the direction perpendicular to the axes of the oil holes 10a and 10b with the intersection point of An oil hole 10c is provided so as to penetrate the main body of the character shaft 10. Of this oil hole 10c A thread is formed at the opening end, and the thread is formed in the oil holes 10a and 10b. By screwing the refueling part 15 for refueling the lease, etc. It is attached to the shaft 10.

[0005]   The grease supplied from the oil supply section 15 passes through the oil holes 10a and 10b of the cross shaft 10. Through the oil groove of the bottom plate 13 to the roller portion 12 of the bearing 11 Flows out of the seal 14.

[0006]   FIG. 7 is an explanatory view showing another structure of the conventional cross shaft assembly, and FIG. FIG. 7 (b) is a side view. In FIG. 7, the same members as those shown in FIG. 6 are used. Members or members having the same function are denoted by the same reference numerals and detailed description thereof is omitted. It The cross shaft assembly shown in FIG. 7 corresponds to the cross shaft 10 of the cross shaft assembly shown in FIG. The structure and the position of the oil filler are different, and the cross shaft 10 in FIG. 7 is shown in FIG. There is no oil hole 10a, 10b in the cross shaft 10, and further, the oil supply portion 15 shown in FIG. Instead of, the oil supply portion 16 is provided in each bearing 11 as shown in FIG.

[0007]   The grease supplied from the oil supply portion 16 passes through the oil groove of the bottom plate 13 and passes through the coke of the bearing 11. (B) The oil is replenished in 12 and the excess grease flows out from the seal 14.

[0008]

[Problems to be solved by the device]

  However, in the cross shaft assembly shown in FIG. 6, the bearing seal has Due to variations in characteristics, grease flows only to bearings with low sealing characteristics, Grease is not sufficiently filled in the rollers of the other three bearings, which shortens the life of the bearings. There was a problem that

[0009]   In the cross shaft assembly shown in FIG. 7, there is variation in characteristics of the bearing seal. However, the grease is fully filled. However, artificial forgetting to refuel one or more bearings As a result, the bearing may become insufficiently lubricated, causing seizure or galling on the bearing and damaging the bearing. There was a problem to do.

[0010]   The present invention solves such a problem and reliably lubricates each bearing. This prevents the bearing life from being shortened and artificially feeds one or more bearings. Univers that prevent damage from seizure and galling of bearings caused by forgetting oil -To provide a cross joint assembly of a monkey joint.

[0011]

[Means for Solving the Problems]

  To achieve the above object, the present invention provides a cross shaft having two axes perpendicular to each other, and Universal joint cross shaft assembly consisting of bearings mounted on the shaft of the cross shaft In the above, the cross shaft is provided with an oil hole coaxial with the two shafts, and an opening end of the oil hole is provided. A recess is provided in the end face portion of the cross shaft, and the opening end is opened and closed in the recess. Lubrication for providing oil to the inside of the bearing by providing a plug movable in the axial direction Is provided, and further, the cross shaft is filled with oil through the oil hole. It is characterized by the provision of a refueling section for With this configuration, the cross shaft body By supplying oil from the oil section, the oil that has passed through the oil holes will push up each plug, A part of the hole is opened so that oil can be filled in each bearing. Also, lubrication of bearings It is possible to lubricate individual bearings from the section.

[0012]   According to the present invention, the plug has a large diameter on the end surface side of the cross shaft and a small diameter on the center side of the cross shaft. The feature is that With this configuration, the oil hole can be It is possible to ensure that the oil that has passed through will push the stopper up.

[0013]   Further, the present invention is such that the cross shaft is coaxial with the axis passing through the intersection of the two shafts. An oil hole that penetrates the cross shaft is formed, and oil supply portions are formed at both ends of the oil hole. Is characterized by. With such a configuration, the cross shaft body is provided with a plurality of lubrication portions. Therefore, refueling work can be easily performed.

[0014]

[Embodiment of device]

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that The same members as those shown in FIG. 5 or members having the same function are designated by the same reference numerals. The detailed description will be omitted.

[0015]   FIG. 1 is an explanatory view showing a configuration of a cross shaft assembly in an embodiment of the present invention. 1 (a) is a plan view and FIG. 1 (b) is a side view. In FIG. 1, 20 is four circles Cross shaft having a columnar shaft portion, 21 is a bottomed cylindrical shape attached to each shaft portion of the cross shaft 20 Bearing 22 and between the inner peripheral surface of the bearing 21 and the outer peripheral surface of each shaft portion of the cross shaft 20. The roller portion 23 to be installed is a bottom surface of the bearing 21 and an end surface of each shaft portion of the cross shaft 20. A bottom plate installed between the two, a seal 24 for sealing the gap between the bearing 21 and the shaft portion, 25 Reference numerals 26 and 26 denote an oil supply portion for supplying grease or the like, and 27 denotes a plug.

[0016]   The central axes of the two shaft parts of the cross shaft 20 facing each other coincide with each other. The two central axes are vertical and intersect each other. Also, two central axes Oil holes 20a and 20b are formed coaxially with the oil holes 20a and 20b facing each other. Penetrates one shank. Similarly, the oil hole 20b has two other shafts that face each other. Penetrates. Therefore, the oil hole 20a or the oil hole 20b is provided on the end surface of each shaft portion. Therefore, the opening is formed. The end faces of the four shafts are inclined toward the intersection of the central axes A tapered portion 20c is formed. Further, it is formed at the center of each tapered portion 20c. The ends of the oil holes 20a and 20b are closed by a stopper 27. This stopper 2 The head of 7 is larger than the diameter of the oil holes 20a and 20b, and the portion facing the tapered portion 20c is It is formed as a slope. In addition, insertion into the oil holes 20a and 20b in the stopper 27 Since the portion is formed smaller than the diameter of the oil holes 20a and 20b, the plug 27 is It is possible to slide along. The material of the stopper 27 is not limited to metal, but is made of oil-resistant plastic. Rastic or rubber may be used.

[0017]   Further, in the center of the cross shaft 20, there is an oil hole starting from the intersection of the oil holes 20a and 20b. Formed in a direction perpendicular to the axes of 20a and 20b and penetrating the main body of the cross shaft 20. An oil hole 20d is provided as a. A thread is formed at the open end of the oil hole 10c. It is made to supply grease etc. to the oil holes 20a, 20b in this thread. The oil supply part 25 is attached to the cross shaft 20 by screwing in the oil supply part 25. . The grease from the oil filler 25 is discharged through the intersection of the oil holes 20a and 20b. The oil flows through the oil holes 20a and 20b in a radial pattern. In addition, the oil holes 20a, 20 in the bearing 21 An opening having a screw thread is formed in a portion facing b. The oil supply portion 26 is fixed to the bearing 21 by screwing 6 in. Book like this In the embodiment, the main body of the cross shaft 20 and the four bearings 21 are fed from a total of five places. It is configured to be oilable.

[0018]   2A and 2B are explanatory views showing a configuration example of the bottom plate. FIG. 2A is a plan view and FIG. It is a side view. The bottom plate 23 is a ring-shaped member. A plurality of oil grooves 23a are formed in a spiral shape toward the outer periphery.

[0019]   The grease supplied from the oil supply portion 25 passes through the oil holes 20a and 20b of the cross shaft 20. Then, the stopper 27 is pushed up to open a part of the oil holes 20a and 20b. It flows out from around 7 to the outside of the cross shaft 20. Furthermore, the grease that has flowed out of the cross shaft 20 Passes through the oil groove 23a of the bottom plate 23 and is fed to the roller portion 22 of the bearing 21. The lease flows out of the seal 24. In addition, the grease supplied from the oil supply unit 26 , The oil passes through the oil groove 23a and is supplied to the roller 22, and the excess grease flows from the seal 24. Put out. In this case, if the oil holes 20a, 20b are not filled with grease, the plugs 27 is pressed by the grease and the oil holes 20a and 20b are closed. If the oil holes 20a and 20b come to pass through the oil groove 23a and are filled with grease, For example, it will pass through the oil groove 23a regardless of the position of the stopper 27.

[0020]   According to the present embodiment configured in this way, the oil supply portion 25 of the cross shaft 20 main body and By supplying oil from the oil supply parts 26 of the four bearings 21, the roller parts 22 are reliably supplied with oil. It will be possible to oil. In addition, refueling from the refueling unit 25 causes the plurality of bearings 21 Even if the user forgets to refuel manually, the refueling section 25 of the cross shaft 20 Since the roller portion 22 of the bearing 21 is filled with the oil supply component of It is possible to prevent seizure and galling due to insufficient lubrication, which is the cause. further, When there is refueling from the refueling section 25, pressure is applied to the plug 27 from the inside. First, the plug 27 moves in the direction to open the oil holes 20a and 20b, and the oil is supplied from the oil supply unit 26. If there is, pressure will be applied from the outside, so the plug 27 will not have oil holes 20a, 20b. Move in the closing direction. As a result, the plug 27 has an oil hole in the bearing 21 that has forgotten to refuel. 20a and 20b are moved in the opening direction, and the oil supply from the oil supply unit 25 It becomes easy to receive.

[0021]   FIG. 3 is an explanatory diagram showing another configuration example of the cross shaft. This configuration example is the same as the configuration shown in FIG. Instead of the tapered portion 20c of the character shaft 20, the diameter is larger than the diameter of the oil holes 20a and 20b. A stepped portion 20e having a cylindrical shape is provided, and the head of the plug 27 is attached to the oil holes 20a and 20b. The diameter is larger than the diameter of the stepped portion 20e and is smaller than the diameter of the stepped portion 20e. It With this configuration, the grease from the grease passing through the oil holes 20a and 20b The pressure is easily transmitted to the stopper 27.

[0022]   FIG. 4 is a plan view showing another configuration example of the cross shaft, and the configuration shown in FIG. 1 or FIG. With a cross axis 20 having a perpendicular to the plane formed by the two central axes? Form an oil hole 20f that penetrates the cross shaft 20 through the intersection of the oil holes 20a and 20b. And the oil supply portions 28, 28 are provided at both ends of the oil hole 20e.

[0023]   With this configuration, the cross shaft 20 main body is provided with two lubrication portions. Therefore, refueling work can be easily performed.

[0024]

[Effect of device]

  According to the present invention configured as described above, the bearings provided on the cross shaft are opposed to each other. It is possible to reliably lubricate and prevent shortening of bearing life. , Damage to the bearing due to seizure or galling caused by artificial forgetting to refuel the bearing Can be prevented.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a configuration of a cross shaft assembly according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration example of a bottom plate.

FIG. 3 is an explanatory diagram showing another configuration example of the cross shaft.

FIG. 4 is a plan view showing another configuration example of the cross shaft.

FIG. 5 is a side view showing a configuration of a universal joint.

FIG. 6 is an explanatory view showing a configuration of a conventional cross shaft assembly.

FIG. 7 is an explanatory view showing another configuration of the conventional cross shaft assembly.

[Explanation of symbols]

20 cross axis 20a, 20b, 20d, 20f Oil holes 20c taper part 20e Step portion 21 bearings 22 Roll 23 Bottom plate 23a oil groove 24 seals 25, 26, 28 Refueling section 27 stoppers

Claims (3)

[Scope of utility model registration request] 1. A cross shaft assembly of a universal joint comprising a cross shaft having two mutually perpendicular shafts and a bearing provided on the shaft of the cross shaft, wherein the cross shaft is coaxial with the cross shaft. An oil hole is provided, and a recess is provided in an end surface portion of the cross shaft having an opening end of the oil hole, and a stopper that opens and closes the opening end and is movable in the axial direction is provided in the recess, and the bearing is provided. A cross joint assembly for a universal joint, characterized in that an oil supply portion for supplying oil to the inside of the bearing is provided, and further an oil supply portion for supplying oil to the inside of the bearing through the oil hole is provided on the cross shaft. Three-dimensional. 2. The cross shaft assembly of a universal joint according to claim 1, wherein the plug has a large diameter on the end face side of the cross shaft and a small diameter on the center side of the cross shaft. 3. An oil hole is formed in the cross shaft so as to be coaxial with an axis passing through the intersection of the two shafts and penetrates the cross shaft, and oil supply portions are formed at both ends of the oil hole. The cruciform shaft assembly of a universal joint according to claim 1 or 2.