Small-lead rotary type six-way ball circulating nut lead screw

Abstract

The utility model discloses a small lead rotation type six-way ball circulation nut lead screw which comprises a nut assembly and a lead screw shaft, the nut assembly is installed on the lead screw shaft, the nut assembly comprises a nut, an internal thread is arranged in the nut, a plurality of second steel balls are connected in the internal thread in a rolling mode, and the second steel balls are connected to the lead screw shaft in a rolling mode. Six circulators are embedded and fixed on the nut, and the second steel balls are connected to the circulators in a rolling manner; the six circulators are arranged around the nut in a spiral rising mode, the included angle between every two adjacent circulators is 72 degrees, and the diameter of the lead screw shaft is 32 mm. Compared with an end cover type inner circulation structure and an integral type inner circulation structure, six circulators are used for achieving six-way split type inner circulation, the stroke of a steel ball is shortened to be one third of the original stroke, and therefore operation resistance is reduced, transmission stability and precision are improved, meanwhile, the service life is prolonged, miniaturization of the device can be achieved through the design, and cost is reduced. And the processing difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission devices, in particular to a small-lead rotary six-way ball circulation nut screw. Background Art

[0002] A ball screw is a device that converts rotary motion into linear motion, or converts linear motion into rotary motion. Existing small-lead rotary ball screws adopt end cover and integral internal circulation structure, which makes the processing of ball grooves difficult, difficult to ensure manufacturing accuracy, and high cost. Therefore, a small-lead rotary six-way ball circulation nut screw is proposed. Utility Model Content

[0003] The utility model aims to provide a small-lead rotary six-way ball circulation nut screw to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a small-lead rotary six-way ball circulation nut screw, including a nut assembly and a screw shaft, the nut assembly is installed on the screw shaft, the nut assembly includes a nut, the nut is provided with an internal thread, a plurality of second steel balls are rollingly connected in the internal thread, and the second steel balls are rollingly connected to the screw shaft, six circulators are embedded and fixed on the nut, and the second steel balls are rollingly connected to the circulators.

[0005] Preferably, the six circulators are arranged in a spiral manner around the nut, and the angle between two adjacent circulators is 72°, and the diameter of the screw shaft is 32 mm.

[0006] Preferably, six first mounting holes are provided on the nut, and six circulators are respectively embedded and fixed in the six first mounting holes.

[0007] Preferably, a boss is provided on the nut, a plurality of second mounting holes are formed at one end of the boss, a sleeve is sleeved on the boss, a flange is provided on the sleeve, and a plurality of third mounting holes are formed on the flange.

[0008] Preferably, the diameter of the boss is 63 mm, the diameter of the flange is 103 mm, the diameter of the nut is 46 mm, the distance between the end face of the boss and the end face of the nut is 86 mm, and the distance between the end face of the flange and the end face of the nut is 75 mm.

[0009] Preferably, two first grooves are formed on the boss, a plurality of first steel balls are rollingly connected in the first grooves, a second groove is formed in the sleeve at a position corresponding to the first groove, and the first steel balls are rollingly connected in the second grooves, and mounting grooves are formed at both ends of the sleeve.

[0010] The small-lead rotary six-way ball circulation nut screw provided by the utility model has the following advantages: compared with the end cover type and integral internal circulation structure, the utility model utilizes six circulators to realize six-way split internal circulation, shortening the stroke of the steel ball to one third of the original, thereby reducing the running resistance, improving the stability and accuracy of the transmission, and also increasing the service life. This design can realize the miniaturization of the device and reduce the processing difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the three-dimensional structure of the nut assembly of the utility model;

[0014] Figure 3 This is a schematic diagram of the front cutaway structure of the nut assembly of the utility model;

[0015] Figure 4 It is an exploded view of the three-dimensional structure of the nut assembly of the utility model.

[0016] In the figure: 1. nut; 11. internal thread; 12. first mounting hole; 13. circulator; 14. boss; 15. first groove; 16. second mounting hole; 2. sleeve; 21. second groove; 22. first steel ball; 23. mounting groove; 24. flange; 25. third mounting hole; 3. screw shaft; 31. second steel ball; 4. nut assembly. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4The utility model provides an embodiment: a small-lead rotary six-way ball circulation nut screw, including a nut assembly 4 and a screw shaft 3, the screw shaft 3 is equipped with a nut assembly 4, the nut assembly 4 includes a nut 1, the nut 1 is provided with an internal thread 11, a plurality of second steel balls 31 are rollingly connected in the internal thread 11, and the second steel balls 31 are rollingly connected to the screw shaft 3, six circulators 13 are embedded and fixed on the nut 1, and the second steel balls 31 are rollingly connected to the circulators 13, the nut 1 accommodates the second steel balls 31 through the internal thread 11, and the second steel balls 31 are rollingly connected to the screw shaft 3. The two steel balls 31 are used to realize rolling friction between the screw shaft 3 and the nut assembly 4, and the six circulators 13 are used to realize the internal circulation design, wherein two circulators 13 form a group, and the second steel ball 31 circulates back and forth in this group of circulators 13; the six circulators 13 are arranged in a spiral rise around the nut 1, and the angle between two adjacent circulators 13 is 72°, and the diameter of the screw shaft 3 is 32mm; six first mounting holes 12 are provided on the nut 1, and the six circulators 13 are respectively embedded and fixed in the six first mounting holes 12, and the first mounting holes 12 are used The nut 1 is provided with a boss 14, one end of which is provided with a plurality of second mounting holes 16, the boss 14 is sleeved with a sleeve 2, the sleeve 2 is provided with a flange 24, the flange 24 is provided with a plurality of third mounting holes 25, the second mounting holes 16 on the boss 14 are used to install screws, and the third mounting holes 25 on the flange 24 are used to install screws; the diameter of the boss 14 is 63mm, the diameter of the flange 24 is 103mm, the diameter of the nut 1 is 46mm, and the distance between the end face of the boss 14 and the end face of the nut 1 is 8 6mm, the distance between the end face of the flange 24 and the end face of the nut 1 is 75mm; two first grooves 15 are provided on the boss 14, and a plurality of first steel balls 22 are rollingly connected in the first grooves 15. A second groove 21 is provided at a position corresponding to the first groove 15 in the sleeve 2, and the first steel ball 22 is rollingly connected in the second groove 21. Mounting grooves 23 are provided at both ends of the sleeve 2, the boss 14 accommodates the first steel ball 22 through the first groove 15, and the sleeve 2 accommodates the first steel ball 22 through the second groove 21. The mounting groove 23 is used to install a dustproof sheet.

[0019] Working principle: When the utility model is used, rolling friction is formed between the screw shaft 3 and the nut assembly 4 through the second steel ball 31, which can convert the rotational motion of the screw shaft 3 into the linear motion of the nut assembly 4, or convert the linear motion of the nut assembly 4 into the rotational motion of the screw shaft 3. By arranging the first steel ball 22 between the sleeve 2 and the boss 14, a support bearing structure is formed, which plays a role in supporting, bearing loads and improving transmission accuracy. The utility model adopts six circulators 13 to realize the internal circulation design, and two circulators 13 form a group. The second steel ball 31 circulates back and forth in this group of circulators 13 to convert the second steel ball 31 into a rotational motion of the screw shaft 3. The stroke of the ball 31 is shortened to one third of the original stroke, thereby greatly reducing the running resistance. When bearing the same load and torque, a smaller nut 1 can be used, which is conducive to miniaturization of the device, thereby reducing the processing cost; wherein, the nut 1 accommodates the second steel ball 31 through the internal thread 11, the first mounting hole 12 is used to install the circulator 13, the first groove 15 and the second groove 21 are used to install the first steel ball 22, the second mounting hole 16 and the third mounting hole 25 are used to install screws, the flange 24 is used to connect with other external devices, and the mounting groove 23 is used to install a dustproof sheet, which is not shown in the figure.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A small-lead rotary six-way ball circulation nut screw, comprising a nut assembly (4) and a screw shaft (3), characterized in that: A nut assembly (4) is mounted on the screw shaft (3), the nut assembly (4) comprising a nut (1), an internal thread (11) is provided in the nut (1), a plurality of second steel balls (31) are rollingly connected in the internal thread (11), and the second steel balls (31) are rollingly connected to the screw shaft (3), six circulators (13) are embedded and fixed on the nut (1), and the second steel balls (31) are rollingly connected to the circulators (13).

2. The small lead rotary six-way ball circulation nut screw according to claim 1, characterized in that: The six circulators (13) are arranged in a spiral manner around the nut (1), and the angle between two adjacent circulators (13) is 72°. The diameter of the screw shaft (3) is 32 mm.

3. The small lead rotary six-way ball circulation nut screw according to claim 2, characterized in that: Six first mounting holes (12) are provided on the nut (1), and six circulators (13) are respectively embedded and fixed in the six first mounting holes (12).

4. The small lead rotary six-way ball circulation nut screw according to claim 3, characterized in that: The nut (1) is provided with a boss (14), one end of which is provided with a plurality of second mounting holes (16), the boss (14) is sleeved with a sleeve (2), the sleeve (2) is provided with a flange (24), and the flange (24) is provided with a plurality of third mounting holes (25).

5. The small lead rotary six-way ball circulation nut screw according to claim 4, characterized in that: The diameter of the boss (14) is 63 mm, the diameter of the flange (24) is 103 mm, the diameter of the nut (1) is 46 mm, the distance between the end face of the boss (14) and the end face of the nut (1) is 86 mm, and the distance between the end face of the flange (24) and the end face of the nut (1) is 75 mm.

6. The small lead rotary six-way ball circulation nut screw according to claim 4, characterized in that: The boss (14) is provided with two first grooves (15), a plurality of first steel balls (22) are rollingly connected in the first grooves (15), a second groove (21) is provided in the sleeve (2) at a position corresponding to the first grooves (15), and the first steel balls (22) are rollingly connected in the second grooves (21), and mounting grooves (23) are provided at both ends of the sleeve (2).

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