SELF-LOCKING DIFFERENTIAL WITH BEVEL GEAR
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- FERRY PIERRE
- Filing Date
- 1989-02-23
- Publication Date
- 1990-08-24
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing self-locking differentials with bevel gears face challenges in maintaining secure axial engagement and torque transmission under varying load conditions, particularly due to the reliance on radial rods and grooves which can lead to slippage and inefficiencies.
The use of locking means, such as cams with triangular sections, engaged in radial grooves and recesses, ensures secure axial engagement by transmitting torque through bearing forces, preventing slippage and enhancing stability under varying loads.
The solution provides enhanced axial stability and efficient torque transmission by preventing slippage, thereby improving the reliability and performance of the self-locking differential mechanism.
Abstract
Description
The present invention relates to a variant of the cooperative rod and groove arrangement of the main patent. The latter relates to a self-locking differential with bevel gears, comprising an input element consisting of a planet carrier, two output elements consisting of two planetary gears, two output shafts each associated with one of the planetary gears, and axially movable locking means to lock two of the three input and output elements together by their axial movement, characterized by the fact that it includes locking means disposed between at least one of the planetary gears and the output shaft associated with it, to oppose said axial movement of the locking means as long as the remaining torque on this output shaft retains a sufficient value. More particularly, it is provided in this patent that the locking means may include at least a first radial rod engaged in a first radial groove with a V-shaped cross-section, said first radial rod being driven in rotation by one of the elements constituted by the planetary pinion and Far the output shaft, and the first radial groove being formed in a member driven in rotation by the other of these elements, the resisting torque being transmitted from the output shaft to the planetary pinion by the bearing force of said first radial rod on one of the flanks of said first groove and the relative axial movement of the first rod and the first radial groove opposing the axial displacement of the locking means. ;1 is also provided that the differential which is the subject of the main patent may comprise at least a second radial rod engaged in a second radial groove, said second radial rod being rotationally fixed to one of the elements constituted by the input member and by the fixing means, and the second radial groove being formed in the other of these elements, said axial displacement being caused by the bearing force of the second rod on one of the flanks of the second groove. According to the invention, said first and / or second rod is replaced by a cam with a substantially triangular cross-section, one apex of which is engaged in the slot of the groove and the opposite base of which is engaged in a recess formed in the organ which carried the rod. In a particular embodiment of the invention, the member in which the groove is closed, and the member in which the embrasure is formed, have stops to limit their relative angular sliding. We will now describe, by way of non-limiting example, a particular embodiment of the invention, with reference to the accompanying drawings in which -Figures 1 and 2 represent the rotating organs in two different positions, depending on the relative value of the torque applied by the driving organ and the resisting torque exerted on the driven organ. The main patent provided in a number of cases for an organ attached to a rod engaged in a rib formed in another organ, one of these organs being driven and the other being driven, the reaction of the rod on the sides of the rib causing an axial force used to ensure the operation of the device. According to the invention, the rod which was integral with a member 100 is replaced by a cam 101 of substantially triangular shape, in this particular case isosceles, whose base 102 is engaged in a recess 103 of the member 1bU, and whose apex 104 opposite the base 102 is engaged at the bottom of the groove 105 of the opposite member 106. If we assume that the driving member is member 100 and that it rotates in the direction indicated by arrow F1, the assembly will adopt the configuration of figure 2 in which cam 101 has tilted, insofar as the resisting torque applied to member 106 is sufficient. Two cooperating stops 107 and 108 can be provided on the components 100 and 108 respectively to limit the relative slippage of these components. tan this position parts 100 and iu6 are separated. If, on the other hand, this spacing is opposed, we recover an axial force in the direction of your arrow F2 as represented in figure 1. It is therefore understood that such an arrangement can replace any of the rod and groove arrangements of the main patent. Various variations and modifications can of course be made to the preceding description without departing from the scope or spirit of the invention.
Claims
DEMANDS 1. Differential according to any one of claims 2 and 8 of the principal patent, characterized in that said first or second rod respectively, is replaced by a cam (101) with substantially triangular cross-section, one apex (104) of which is engaged in the bottom of the groove (105) and the opposite base (10) of which is engaged in a recess (103) formed in the intorg.-e (100) which carried the rod.
2. Differential according to claim 1, characterized in that the member (106) in which the groove is formed and the member in which the recess is formed have stops (107,108) to limit their relative angular slippage.