JPH04110257U - Transmission lubricant induction device - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to forcibly guide lubricating oil using the rotational movement of a device with a triple case structure. [Structure] A differential gear mechanism having a sun gear, an internal gear, and a planetary gear that is pivotally supported by a carrier with a pivot pin and meshes with at least one of the gears is pivotally supported in a transfer case. The input member and the output member provided on either the left or right side of the transfer case are installed inside the differential case, and the vicinity of the shaft portion of the differential case is spline-coupled to the sun gear. In the coupled transmission device, there is an oil groove provided in the spline joint, and an inner surface of the differential case on the side of the spline joint to guide the oil in the oil groove toward the outer circumference of the differential case. The invention is characterized in that it has a spiral groove provided therein, and an oil hole provided in the axial direction of the shaft support pin for guiding oil in the spiral groove to the one side of the differential case.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a lubricating oil induction device for a transmission.

0002

[Conventional technology]

As an example of a transmission device, FIG. 5 shows a differential gear mechanism 101 as a center differential of a vehicle. A transfer 103 of a four-wheel drive vehicle using the following is shown.

0003 Here, the left-right direction is the left-right direction in the same figure above, and the front-back direction is the vertical direction in the same figure. Ru.

0004 The differential gear mechanism 101 includes an internal gear 105 and an outer planetary gear 10 that meshes with the internal gear 105. 7, the sun gear 109, the sun gear 109, and the outer planet gear 107. These planetary gears 10 are connected by the meshing inner planetary gear 111 and the pins 113 and 115. 7 and 111, and carriers 117 and 119 that pivotally support the carriers 7 and 111.

[0005] This differential gear mechanism 101 is installed inside a differential case 121, and the differential case 121 is , to the transfer case 123 that houses this, the left and right bearings 125, 12. 7, and the sun gear 109 is mounted on the differential case near the shaft support 129. 121 by a spline joint 131.

[0006] The hollow shaft portion 133 of the internal gear 105 is located on either the left or right side of the differential case 121 (see FIG. (left side), and the inside of the transfer case 123 can be accessed from this one side. The input member 135 is spline-coupled to the input member 135, which is a hollow shaft penetrated through the The hollow shaft portion 137 of the carrier 117 formed on one side is located on the left side in FIG. The input shaft of the front wheel differential (not shown) is connected to the input shaft of the front wheel differential (not shown). The front wheel axle of the front wheel axle and the right front wheel axle 139 that penetrates inside the hollow shaft part 137 are each differentially driven. do.

[0007] A gear 141 as an output member is mounted on the left side (one side above) of the differential case 121. The gear 141 is pivotally supported at the rear of the transfer case 123. The bevel gear of this counter shaft 143 meshes with the gear 145 of the counter shaft 143. 147 is a drive pinion shaft 1 pivotally supported at the rear of the transfer case 123. 49, and a drive pinion shaft 149 (not shown) engages with the bevel gear 151. It is connected to the input shaft of the rear wheel differential via a propeller shaft.

[0008] The input member 135 is connected to a transmission (not shown) located at the upper left in FIG. Connected to the output shaft.

[0009] The carrier 117 is connected to each hollow shaft portion 137 with respect to the internal gear 105. , 133 in the radial direction and the axial direction. has been positioned.

0010 In this way, the transmission device has an input member that inputs power to the transfer 103. 135, a hollow shaft portion 137 as an output member for outputting to the front wheel differential and the rear wheel differential, and a gear The ear 141 is located on one side (the left side in the illustrated example) of the transfer case 123. Because it is located in the The propeller shaft, etc. can be placed on the same side of the vehicle, making it easier for layout , which is convenient.

[0011]

[Problem that the idea aims to solve]

The transmission device includes carriers 117 and 11 inside the transfer case 123. 9. There are three types of internal gears 105 on the outside, and a differential case 121 on the outside. Since the case-like bodies are arranged close to each other, the lubricity of the differential gear mechanism 101 is improved. is not good.

0012 In particular, the mutual positioning of the carrier 117 and the internal gear 105 on the outside thereof is performed. The above-mentioned bush 151 is attached to the carrier 117 and the internal gear 105, respectively. Since it is interposed between the flange-like parts 153 and 155, the flange-like part 153 It is difficult to guide lubricating oil into the extremely narrow gap between bush 1 and 155. 51's lubrication is poor.

[0013] As a result, the friction of this bush 151 becomes significant and the positioning function becomes insufficient. In addition, there is a possibility that burn-in may occur.

[0014] This idea solves the problem of lubricating the transmission device with the triple case structure. This was developed by focusing on the problem of The purpose of the present invention is to provide a lubricating oil guiding device devised to forcefully guide the lubricating oil.

[0015]

[Means to solve the problem]

In order to solve the above problems, this idea is The sun gear, the internal gear, and the carrier are supported by a support pin, and at least the above A differential gear mechanism with a planetary gear meshing with one gear is inside the transfer case. It is installed inside the differential case which is pivotally supported by the sun gear. Pline-coupled and installed on either the left or right side of the transfer case. A transmission device in which an input member and an output member are coupled to each other via the differential gear mechanism. At the time of installation, the oil groove provided in the above spline joint and the oil in this oil groove are connected to the differential cage. The above spline joint side of this differential case The spiral groove provided on the inner side of the differential case and the oil in the spiral groove are placed on one side of the differential case. The structure is such that it is provided in the axial direction of the pivot pin for guiding.

[0016] Then, an internal tooth gear is used to guide the oil coming out of the oil hole toward the axis of the internal gear. A spiral groove is provided on the inner side surface of the layer.

[0017]

[Effect]

The oil in the transfer case passes through the spline connection to the inside surface of the differential case. When it gets into the vicinity and the differential case rotates, the spiral groove on the inner side of the differential case The fluid flows outward in the circumferential direction due to centrifugal action.

[0018] Then, the fluidized oil is introduced into the oil hole of the shaft support pin and passes through this oil hole. It is guided near the inner surface of one side of the gear, and the internal gear and the cap are located near this area. Lubricate the bushing for positioning between the rears.

[0019] In this way, oil is forcibly guided by the centrifugal action that accompanies the rotation of the differential gear mechanism. Therefore, it is important to provide sufficient lubrication to internal gears, bushes installed in narrow areas between carriers, etc. It was scheduled to be held in minutes.

[0020] The oil that exits the oil hole of the shaft support pin flows into the helical groove provided on the inner surface of the internal gear. Therefore, it is forcibly guided toward the shaft center, and the lubrication of the bush etc. That's pretty much certain.

[0021]

【Example】

Examples of this invention will be described below based on the drawings.

[0022] 1 is a cross-sectional plan view showing the main parts of the transmission, and FIG. 2 is a cross-sectional plan view showing the main parts of the transmission device, and FIG. It is a line arrow view.

[0023] Since the transmission device itself is the same as that shown in FIG. Identical components are given the same reference numerals.

[0024] Spline joint 1 formed between differential case 121 and sun gear 109 31, a plurality of oil grooves 1 are provided in the axial direction, and the center side of each oil groove 1 is exposed. Connect the spiral groove 3 on the front side of the differential case 121 to the above splice. It is provided on the inner surface of the flange portion 5 on the side of the coupling portion 131, and the spiral groove 3 is The direction is such that the diameter increases along the direction of rotation of the flange portion 5 shown by the arrow. Ru.

[0025] The oil groove 1 illustrated in FIG. A tooth is missing, and one of the spline holes 9 of the differential case 121 is positioned to mesh with the missing tooth. It is formed by missing the row teeth.

[0026] The outer and inner planetary gears 107 and 111 are mounted on carriers 117 and 119, respectively. The oil holes 11 and 13 are penetrated in the axial direction of the supported shaft support pins 113 and 115. There is.

[0027] Then, near the outer periphery of the carrier 119 adjacent to the flange portion 5, A ring-shaped sealing material 15 is attached to the side surface of the carrier 119 and the flange portion 5. This shield prevents the oil that has flowed between the This is prevented by a wall material 15.

[0028] Note that the chamber 17 in which the differential case 121 of the transfer case 123 is installed is formed to be more swollen than the chamber 19 on the right side of this, and therefore the transfer The oil in the case 123 flows from the chamber 19 into the gap between the inner and outer rings of the right bearing 127. A seal is placed on the bearing 127 to prevent the flow from flowing naturally into the chamber 17 through the A material 21 is provided to prevent such flow.

[0029] Also, the oil accumulated in the left chamber 17 is returned to the right chamber 19 by a gutter (not shown). It has a structure that allows

[0030] Next, its effect will be explained.

[0031] In the right chamber 19 of the transfer case 123, there is at least a spline connection. Since the oil is filled to a level near the lower side of section 131, the spline connection Oil flows into the center of the spiral groove 3 through the oil groove 1 of 131.

[0032] Then, the planetary gear mechanism 101 operates via the input shaft 135, and the differential case 121 When rotates in the direction of the arrow in Fig. 2, the oil on the center side in the spiral groove 3 is affected by the centrifugal action. Therefore, it flows in the spiral groove 3 toward the outer circumference of the flange portion 5 and is emitted radially.

[0033] The released oil is trapped between the carrier 119 and the flange portion 5 by the sealing material 15. The oil is collected and flows into the oil holes 11 and 13 of the pivot pins 113 and 115.

[0034] The oil flowing into the oil holes 11 and 13 is caused to flow into the flange of the internal gear 105 due to its inflow force. It flows out from the side of the flange part 155 and the flanges of this flange part 155 and the carrier 117. The bushing 151 is sprinkled through a narrow gap between the bushing 153 and the bushing 153. Lubricate bush 151.

[0035] The oil that has finished lubricating the bush 151 is released into the hollow shaft portion 133 of the internal gear 105. It is discharged through the hole 25 into the chamber 17 on the left.

[0036] As a result, friction of the bush 151 is suppressed, and both flange portions 155, 1 The frictional heat with 53 will be cooled down and the risk of seizure will be eliminated. It was.

[0037] This lubrication function is achieved by the conventionally used sun gear 109 and differential case. 121 to the oil groove 1 by a simple method such as missing teeth. A spiral groove 3 is formed in the flange portion 5 of the differential case 121, and a planetary gear Perfection to the extent of drilling oil holes 11, 13 in the shaft support pins 113, 115 of 107, 111. This can be obtained by simple processing and adding sealants 15 and 21. Therefore, the cost of implementation is extremely high compared to forced lubrication using an oil pump. It is easy to use and economical.

[0038] A cross-sectional plan view of another embodiment of this invention is shown in Fig. 3, and Fig. 4 is a view taken along the line III-III. It was shown to.

[0039] Components that are the same as those of the first embodiment shown in FIGS. 1 and 2 are designated by the same reference numerals. The explanation of the structure of is omitted.

[0040] This second embodiment is shown in a front view with the center side facing into the bush 151. A spiral groove 27 is provided on the inner side surface of the flange portion 155 of the internal gear 105. The spiral direction of the spiral groove 27 is determined by the rotation of the flange portion 155 shown by the arrow. Some have a diameter that decreases along the direction.

[0041] As a result, the oil passes through the oil holes 11, 13 of the pivot pins 113, 115 and connects to the flange. The oil that has flowed out to the side of section 155 will sometimes enter these oil holes 11 and 13. It flows into the spiral groove 27 of the flange portion 155 and as the flange portion 155 rotates. The flow is guided by the spiral groove 27 toward the center, and the bush 1 in the center 51 will be lubricated.

[0042] Therefore, according to this second embodiment, the interior is narrow due to the triple case-like structure. Towards the gap between the toothed gear 105 and the flange portions 155, 153 of the carrier 117 The oil flowing out from the oil holes 11 and 13 of the pivot pins 113 and 115 is drained through the helical groove 27. This is forcibly guided to the bush 151, and is based on the configuration of the first embodiment. This second embodiment has the effect of further improving and ensuring the lubrication effect of the bush 151. is something that can be demonstrated.

[0043] Reference numeral 29 indicates that oil between the flange portions 153 and 155 escapes to the outside of these outer peripheries. This is a sealing material to prevent water from leaking.

[0044]

[Effect of the idea]

As is clear from the above, according to this invention, as the planetary gear mechanism rotates, Due to centrifugal action, the oil in the transfer case flows into the oil groove of the spline connection and the differential. The triple cage is forcibly guided through the helical groove of the A positioning bush between the internal gear and the carrier, which is narrow due to its carrier-like structure. The oil was sufficient to lubricate the housing.

[0045] This lubrication function is achieved by creating oil grooves in conventionally used components such as sun gears. It can be obtained by extremely simple processing such as creating grooves, etc., and is suitable for special applications such as oil pumps. This means that it can be implemented at low cost without requiring any large parts or large parts.

[0046] The oil flowing out from the oil hole of the shaft support pin is drained from the oil hole provided on the inner surface of the internal gear. It is forcibly guided toward the shaft center by the groove, and the lubrication effect on the bushing etc. is uniform. That was definitely going to happen.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional plan view of a first embodiment of this invention.

FIG. 2 is a view taken along the line II-II in FIG. 1;

FIG. 3 is a cross-sectional plan view in a second embodiment.

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional plan view showing an example of a transmission device to which this invention can be applied.

[Explanation of symbols]

1 Oil groove 3,27 Spiral groove 11,13 Oil hole 101 Differential gear mechanism 105 Internal gear 107,111 Planetary gear 109 Sun Gear 113,115 Pivot support pin 117,119 carrier 121 differential case 123 Transfer case 131 Spline joint 135 Input member 137 Hollow shaft part (output member) 141 Gear (output member)

Claims (2)

[Scope of utility model registration request] Claim 1: A differential gear mechanism having a sun gear, an internal gear, and a planetary gear that is pivotally supported by a carrier by a pivot pin and meshes with at least one of the gears, the differential gear mechanism is pivotably supported within a transfer case. It is installed inside the differential case, and the vicinity of the above-mentioned shaft part of the differential case is spline-coupled to the sun gear.
In a transmission device in which an input member and an output member provided on one of the left and right sides of the transfer case are coupled to each other via the differential gear mechanism, an oil groove provided in the spline coupling portion and an oil groove provided in the spline coupling portion; A spiral groove is provided on the inner surface of the differential case on the spline joint side to guide the oil in the oil groove toward the outer circumference of the differential case, and a spiral groove is provided in the inner surface of the differential case to guide the oil in the spiral groove toward the one side of the differential case. A lubricating oil guide device for a transmission device, comprising an oil hole provided in the axial direction of the shaft support pin. 2. The transmission according to claim 1, wherein a spiral groove is provided on the inner side surface of the internal gear to guide the oil exiting the oil hole toward the axis of the internal gear. Equipment lubricating oil induction device.