Ball spline bearing
A ball spline and spline shaft technology, used in bearings, shafts and bearings, linear motion bearings, etc., can solve the problems affecting the overall life of ball spline linear bearings, limited bearing capacity, wear of one-sided balls, and raceway grooves And other issues
Inactive Publication Date: 2010-02-17
YANGZHOU FORGING MACHINE TOOL
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Problems solved by technology
However, in some specific work, when the transmission system is doing linear motion and needs to transmit torque, there will be a certain radial eccentric load. This radial eccentric load will cause the concentricity between the spline sleeve and the spline shaft. Errors, which in turn cause abnormal wear of balls and raceway grooves on one side, affecting the overall life of ball spline linear bearings
Therefore, the bearing capacity of ball spline bearings is often very limited when completing complex motion transmission.
Method used
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[0014] like Figure 1~5 As shown, the present invention comprises a spline sleeve 1 and a spline shaft 3, and a raceway groove 30 and a ball groove 20 are respectively arranged on the spline sleeve 1 and the spline shaft 3, and the ball 2 is arranged on the raceway groove 30 and the ball groove 20, the spline sleeve 1 and the spline shaft 3 are coaxial and can slide axially through the ball 2. It also includes an oil chamber 4, and the oil chamber 4 is evenly distributed between the ball grooves 20 on the inner surface of the spline sleeve 1. The spline sleeve 1 is provided with an oil hole 5 connecting the oil chamber 4 with the external oil circuit.
[0015] When the spline shaft 3 moves linearly along the axis of the spline sleeve 1, the ball 2 arranged on the raceway groove 30 of the spline shaft 3 and the multiple oil chambers 4 arranged on the inner wall of the spline sleeve 1 constitute a hydrostatic bearing At the same time, it provides support for the spline shaft 3,...
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The invention provides a ball spline bearing and relates to an improvement on the ball spline bearing. A static oil chamber structure is arranged between a spline sleeve and a spline shaft, so that the condentricity and the radial bearing capacity of the spline sleeve and the spline shaft are improved. The ball spline bearing comprises the spline sleeve and the spline shaft, wherein the spline sleeve and the spline shaft are provided with roll path slots and roll ball slots respectively; the roll balls are arranged in the roll path slots and the roll ball slots; the spline sleeve and the spline shaft are coaxially arranged and can axially slide by the roll balls; the ball spline bearing also comprises high-pressure oil chambers which are evenly arranged among the roll ball slots on the inner surface of the spline sleeve; and the spline sleeve is provided with oil holes by which the oil chambers are connected with an external oil circuit. The ball spline bearing of the invention can greatly improve the comprehensive bearing capacity under a condition of ensuring operating accuracy, and greatly prolong the service life under a condition of improving the comprehensive bearing.
Description
technical field [0001] The invention relates to a ball spline linear bearing, in particular to the improvement of the ball spline bearing. Background technique [0002] In the prior art, the ball spline linear bearing has high running precision and can transmit torque while linearly moving. Some machine tools often use ball spline bearings when they have linear motion and transmit torque. However, in some specific work, when the transmission system is doing linear motion and needs to transmit torque, there will be a certain radial eccentric load. This radial eccentric load will cause the concentricity between the spline sleeve and the spline shaft. Error, which in turn causes abnormal wear of balls and raceway grooves on one side, and affects the overall life of the ball spline linear bearing. Therefore, the bearing capacity of ball spline bearings is often very limited when completing complex motion transmission. Ball spline bearings are sometimes designed to be large in...
Claims
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IPC IPC(8): F16C29/06
Inventor 张庆飞管爱春赵宏松
Owner YANGZHOU FORGING MACHINE TOOL