External circulation type ball bolt
A technology of ball screw and external circulation, applied in the direction of belt/chain/gear, mechanical equipment, transmission device, etc., can solve the problems of foreign matter intrusion into the ball screw, insufficient strength, etc., and achieve the effects of improving rigidity, fast and convenient manufacturing, and easy processing
Active Publication Date: 2010-07-28
HIWIN TECH
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AI Technical Summary
Problems solved by technology
[0010] 1. The structure of the circulation device is a combination of two pieces on the left and right, and the plastic parts are likely to be stretched to the left and right sides due to factors such as impact at the turning of the ball, so there may be doubts about its insufficient strength
And foreign matter is easy to invade the inside of the ball screw from the gap between the two components
Method used
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Embodiment approach
[0073] Based on the above, the circulation device 3 after assembly is to install the guide part into the installation hole 211 of the nut 2, and the two are aligned with each other through the geometric shape, and the nut 2 is connected by the bearing surface. contact with the flat surface 21 of the guide part, so that the nail 311B of the guiding part is just placed in the rolling groove 11 of the screw 1, and then the through hole 341A of the cover part 3A is pierced by the fixing part G to connect with the fixing hole 212 of the nut 2 Cooperate and fix, and the head of the fixing part G is accommodated in the recess 34A, so that the circulation device 3 can be firmly fixed on the nut; and the return channel of the circulation device 3 connects with the rolling path, The rolling element X is guided by the fingernail 311B of the guide part into the return channel, and then enters the rolling path from the other end of the return channel, so that the rolling element X can endle...
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The invention provides an external circulation typed ball screw, comprising a screw, a screw cap, a rolling part and a circulation device; the screw cap is a hollow structure and sleeved on the screw; while the rolling part is arranged between the rolling ditch of the screw and the rolling channel of the screw cap; the circulation device consists of a covering part and a base; the covering part is provided with an extension part and a first half-runway; the base is provided with a foot part and a half-runway corresponding to the extension part; when the circulation device is installed, after the foot part is arranged in the installation hole of the screw cap, the covering part is arranged on the base in a covering way, thus completing the assembly of the circulation device; furthermore, the circulation device can be produced by die injection, thus improving the problem that the existing circulation devices are not easy to be manufactured and assembled.
Description
technical field [0001] The invention relates to a ball screw, in particular to an external circulation ball screw. Background technique [0002] Today's ball screw is more and more used in industry. In addition to the high-precision effect of linear feed transmission, it also has the advantages of low friction loss rate, high energy conversion rate, low noise, high rigidity and not easy to damage. , therefore, the importance of the ball screw for various industrial application machines and tools cannot be overstated. [0003] As mentioned above, since the nut can reciprocate infinitely on the screw rod, a circulation device must be provided so that the rolling elements can circulate in the rolling groove infinitely, and the conventional design of the circulation device is such as: US Patent US3661030, etc. However, the return path of the circulation device will have a bend. When the rolling element is running at high speed, it will continuously impact the nail and the bend ...
Claims
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IPC IPC(8): F16H25/22
CPCF16H25/2214
Inventor 陈彦羽屈岳陵
Owner HIWIN TECH