Hollow cooling type ball screw

Abstract

The utility model discloses a hollow cooling type ball screw which comprises a screw body, a screw nut is sleeved on the screw body in a threaded mode, a rotary body is sleeved on the front half portion of the screw body, and a pair of rotary supporting bearing sets is arranged between the rotary body and the screw body. A rotary spring plug is further arranged between the rotary body and the rotary supporting bearing set, a pair of annular rings is arranged on the side, close to the rotary body, of the rotary spring plug, sealing cavities are formed in the opposite sides of the annular rings, an oil outlet is further formed in the lead screw body, an oil guide cavity is further formed in the rotary body, and the oil guide cavity is communicated with the oil outlet. The sealing cavity is communicated with the oil outlet through the oil guide cavity; a cooling through groove is formed in the center of the lead screw body, and a plugging head is installed at the position, corresponding to the cooling through groove, of the front side of the lead screw body. The rotary spring plug is reasonable in structure, the sealing effect of the oil outlet position can be improved, the durability of the rotary spring plug made of the carbon fiber material is good, and the service life of the rotary spring plug can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hollow cooling type ball screw. BACKGROUND

[0002] The ball screw is a kind of high-efficiency transmission function component widely used in numerical control machine tool, usually is by ball screw, ball nut, ball and be used for circulating ball's ball return device etc.

[0003] In order to solve the above problem, the utility model discloses hollow inner cooling type ball screw pair, through hollow inner cooling type ball screw pair because ball screw inside has the circulation flow of constant temperature oil liquid, very good inhibition due to the rise of temperature and lead to ball screw thermal expansion, thereby realize the stable high-precision positioning requirement of machine tool.

[0004] However, the ball screw is sealed by setting the skeleton oil seal outside the sealing unit position, and the sealing effect is limited. UTILITY MODEL CONTENTS

[0005] The utility model discloses a hollow cooling type ball screw to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A hollow cooling type ball screw, comprising a screw body, a screw nut is threadedly sleeved on the screw body, a rotary body is sleeved on the front half of the screw body, a pair of rotary support bearing sets are arranged between the rotary body and the screw body, a rotary damper is arranged between the rotary body and the rotary support bearing set, a pair of annular rings are arranged on the side of the rotary damper close to the rotary body, a sealing cavity is arranged on the opposite side of the pair of annular rings, an oil outlet is arranged on the screw body, an oil guide cavity is arranged on the rotary body, the sealing cavity is communicated with the oil outlet through the oil guide cavity; a cooling channel is arranged at the center of the screw body, a plugging head is installed on the front side of the screw body corresponding to the cooling channel, an oil inlet pipe is installed on the rear side of the screw body through a rotary joint, and an oil outlet pipe is installed on the rotary body.

[0008] As a preferred scheme, the pair of rotary support bearing sets are distributed on the front and rear sides of the rotary body, and the rotary support bearing set on the rear side is in contact with the stepped portion of the screw body.

[0009] As a preferred scheme, a rotary nut is threadedly sleeved on the screw body, and the rotary nut is in contact with the rotary support bearing set on the front side.

[0010] As a preferred scheme, a front mounting seat is further arranged on the front side of the screw body, a driving motor is further installed on the front side of the front mounting seat, and the output end of the driving motor is connected with the screw body through a shaft coupling.

[0011] As a preferred scheme, a front support bearing set is further arranged between the front mounting seat and the screw body, a front support nut is further threadedly sleeved on the screw body, and the front support nut is in contact with the front side of the front support bearing set.

[0012] As a preferred scheme, a rear mounting seat is further sleeved on the rear side of the screw body, a rear support bearing set is arranged between the rear mounting seat and the screw body, a rear support nut is further threadedly sleeved on the screw body, and the rear support nut is in contact with the rear support bearing set.

[0013] As a preferred scheme, the rotary damper is made of carbon fiber material.

[0014] Compared with the prior art, the utility model discloses the beneficial effects are: through the oil inlet pipe to the screw body in -body delivery coolant, subsequently coolant flows from the oil outlet into the gyratory body, part coolant enters the sealed cavity through the oil guide cavity, then extrude annular ring on both sides, make it respectively close to the screw body, gyratory body to improve the sealing effect of this position, reduce the possibility of coolant leakage, at the same time, another part of coolant absorbs the heat of the screw body, and then oil outlet oil outlet pipe discharges, can realize the cooling work of the screw body. The utility model discloses reasonable structure can improve the sealing effect of the oil outlet position, and the rotatory universal plug of carbon fiber material is made of good durability, can prolong its service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a kind of hollow cooling type ball screw overall structure schematic diagram;

[0016] Figure 2 It is a kind of hollow cooling type ball screw Figure 1 Amplification structure schematic diagram in place B;

[0017] Figure 3 It is a kind of hollow cooling type ball screw Figure 2 Amplification structure schematic diagram in place B.

[0018] In the drawing: 1, screw body;11, screw nut;12, drive motor;13, front mounting seat;14, shaft coupling;15, rotary joint;16, oil inlet pipe;17, plugging head;18, oil outlet pipe;2, rear mounting seat;21, rear support nut;22, rear support bearing group;3, front support bearing group;31, front support nut;4, gyratory body;41, rotatory universal plug;411, annular ring;412, sealed cavity;413, oil outlet;414, oil guide cavity;42, gyratory support bearing group;43, gyratory nut. DETAILED DESCRIPTION

[0019] The technical scheme in the utility model embodiments will be described clearly and completely below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] Embodiment: please refer to Figures 1 to 3The utility model provides a hollow cooling type ball screw, including: screw body 1 is screwed on screw nut 11 on the screw body 1, the screw body 1 front half is equipped with rotary body 4, a pair of rotary support bearing groups 42 are arranged between rotary body 4 and screw body 1, rotary body 4 and rotary support bearing group 42 are also provided with rotary floodgate 41, a pair of annular rings 411 are arranged on the side of rotary floodgate 41 close to rotary body 4, and the opposite side of a pair of annular rings 411 is provided with sealing cavity 412, and the screw body 1 is also provided with oil outlet 413, and rotary body 4 is also provided with oil guide cavity 414, and sealing cavity 412 is communicated with oil outlet 413 through oil guide cavity 414, the central position of screw body 1 is provided with cooling channel, and the position of screw body 1 front side corresponds cooling channel and is installed with plugging head 17, and screw body 1 rear side is installed with oil inlet pipe 16 through rotary joint 15, and rotary body 4 is installed with oil outlet pipe 18, in the embodiment, the rotary floodgate 41 made of carbon fiber material has good wear resistance, and the service life can be prolonged.

[0021] The plugging head 17 at the end can prevent the cooling liquid from flowing out of the end, thereby facilitating the installation of the driving motor 12 to drive the screw body 1 to rotate.

[0022] The working principle of the utility model is as follows: the cooling liquid is delivered into the screw body 1 through the oil inlet pipe 16, then the cooling liquid flows into the rotary body 4 from the oil outlet 413, part of the cooling liquid enters the sealing cavity 412 through the oil guide cavity 414, then the annular rings 411 on both sides are extruded to make them close to the screw body 1 and the rotary body 4 respectively, thereby improving the sealing effect at the position and reducing the possibility of cooling liquid leakage, at the same time, another part of the cooling liquid absorbs the heat of the screw body 1, is discharged through the oil outlet pipe 18 after passing through the oil outlet 413, and the cooling work of the screw body 1 can be realized.

[0023] As a further scheme, the pair of rotary support bearing groups 42 are distributed on the front and rear sides of the rotary body 4, wherein the rotary support bearing group 42 on the rear side abuts against the stepped portion of the screw body 1, in the embodiment, the screw body 1 is also screwed with a rotary nut 43, and the rotary nut 43 abuts against the rotary support bearing group 42 on the front side.

[0024] The rotary nut 43 cooperates with the stepped portion to position the rotary support bearing group 42 and the rotary body 4, thereby preventing them from slipping on the screw body 1.

[0025] As a further scheme, the front side of the screw body 1 is also provided with a front mounting seat 13, the front side of the front mounting seat 13 is also installed with a driving motor 12, and the output end of the driving motor 12 is connected with the screw body 1 through a shaft coupling 14. The driving motor 12 installed at the end facilitates the driving of the screw body 1 to rotate.

[0026] As a further scheme, the front mounting seat 13 and the screw rod body 1 are further provided with a front supporting bearing set 3, the screw rod body 1 is further threadedly rotatable with a front supporting nut 31, and the front supporting nut 31 is in contact with the front side of the front supporting bearing set 3. By arranging the front supporting nut 31, the front supporting bearing set 3 can be positioned in cooperation with the front mounting seat 13.

[0027] As a further scheme, the screw rod body 1 is further sleeved with a rear mounting seat 2, the rear mounting seat 2 and the screw rod body 1 are provided with a rear supporting bearing set 22, and the screw rod body 1 is further threadedly rotatable with a rear supporting nut 21, and the rear supporting nut 21 is in contact with the rear supporting bearing set 22. By arranging the rear supporting nut 21, the rear supporting bearing set 22 can be positioned in cooperation with the rear mounting seat 2.

[0028] In the utility model, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only the relationship words determined for the convenience of describing the structural relationship of the components or elements of the utility model, and cannot be understood as the limitation of the utility model.

Claims

1. A hollow cooling ball screw, characterized in that: include: A screw body (1), wherein a screw nut (11) is threadedly mounted on the screw body (1), a rotary body (4) is mounted on the front half of the screw body (1), a pair of rotary support bearing groups (42) are arranged between the rotary body (4) and the screw body (1), a rotary plug (41) is further arranged between the rotary body (4) and the rotary support bearing group (42), a pair of annular rings (411) are arranged on one side of the rotary plug (41) close to the rotary body (4), and a sealing cavity (412) is arranged on the opposite side of the pair of annular rings (411), an oil outlet (413) is further provided on the screw body (1), an oil guide cavity (414) is further provided on the rotary body (4), and the sealing cavity (412) is communicated with the oil outlet (413) through the oil guide cavity (414); A cooling groove is provided at the center of the screw body (1), a plugging head (17) is installed at a position corresponding to the cooling groove on the front side of the screw body (1), an oil inlet pipe (16) is installed on the rear side of the screw body (1) through a rotary joint (15), and an oil outlet pipe (18) is installed on the rotary body (4).

2. The hollow cooling ball screw according to claim 1, characterized in that: A pair of the rotary support bearing groups (42) are distributed on the front and rear sides of the rotary body (4), wherein the rotary support bearing group (42) on the rear side contacts the stepped portion of the screw body (1).

3. The hollow cooling ball screw according to claim 2, characterized in that: A rotary nut (43) is also threadedly mounted on the lead screw body (1), and the rotary nut (43) is in conflict with the rotary support bearing assembly (42) on the front side.

4. The hollow cooling ball screw according to claim 3, characterized in that: A front mounting seat (13) is also provided on the front side of the screw body (1), and a driving motor (12) is also installed on the front side of the front mounting seat (13). The output end of the driving motor (12) is connected to the driving of the screw body (1) through a coupling (14).

5. The hollow cooling ball screw according to claim 4, characterized in that: A front support bearing group (3) is also provided between the front mounting seat (13) and the screw body (1), and a front support nut (31) is also threadedly mounted on the screw body (1), and the front support nut (31) abuts against the front side of the front support bearing group (3).

6. The hollow cooling ball screw according to claim 5, characterized in that: The rear side of the screw body (1) is also provided with a rear mounting seat (2), a rear support bearing group (22) is provided between the rear mounting seat (2) and the screw body (1), and a rear support nut (21) is also screwed on the screw body (1), and the rear support nut (21) is in contact connection with the rear support bearing group (22).

7. The hollow cooling ball screw according to claim 1, characterized in that: The rotating vane (41) is made of carbon fiber material.

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