Planetary roller screw with good cooling effect

Abstract

The utility model discloses a planetary roller screw with good cooling effect, which comprises a middle screw (1), a gear ring (2), an enclasping piece (3) and a plurality of roller bodies (4), a liquid inlet (5) and a liquid outlet (6) are symmetrically arranged on the bottom surface of the enclasping piece (3), a cooling liquid cavity (7) is arranged in the enclasping piece (3), and the cooling liquid cavity (7) is communicated with the liquid inlet (5) and the liquid outlet (6); and a plurality of ventilation channels (8) which are annularly and uniformly distributed are arranged on the gear ring (2) in a penetrating manner. The cooling device not only can improve the cooling effect, but also has the advantages of being high in cooling speed, high in structural strength, convenient to install and high in use stability.

Description

Technical Field

[0001] The utility model relates to a planetary roller screw, in particular to a planetary roller screw with good cooling effect. Background Art

[0002] A planetary ball screw is a type of ball screw, a transmission component that converts rotational motion into linear motion. It primarily consists of an intermediate screw, a clamping element, a nut housing, and multiple rollers. Because planetary ball screws operate at high speeds and the gap between the rollers and the intermediate screw is small, overheating of the rollers and intermediate screws can occur over time, resulting in poor cooling of the entire planetary ball screw. Consequently, existing planetary ball screws suffer from poor cooling. Utility Model Content

[0003] The purpose of the utility model is to provide a planetary roller screw with good cooling effect.

[0004] The utility model has the advantage of good cooling effect.

[0005] The technical solution of the present invention: a planetary roller screw with good cooling effect, comprising an intermediate screw, a ring gear, a clamping member and a plurality of roller bodies, a liquid inlet and a liquid outlet being symmetrically provided on the bottom surface of the clamping member, a cooling liquid cavity being provided in the clamping member, and the cooling liquid cavity being connected with the liquid inlet and the liquid outlet; a plurality of annular and evenly distributed ventilation channels are provided through the ring gear; the cooling liquid in the cooling liquid cavity can be circulated by utilizing an external cooling liquid circulation system, so that the internal cooling liquid can perform the first cooling work on the intermediate screw and the roller body; in combination with the ventilation channel provided on the ring gear, the intermediate screw and the roller body can be air-cooled, and the mutual cooperation of air cooling and water cooling can improve the cooling effect and cooling rate of the entire planetary ball screw.

[0006] In the aforementioned planetary roller screw with good cooling effect, the diameter of each ventilation channel close to the roller body end is smaller than the diameter of the ventilation channel far from the roller body end; the ventilation duct is arranged in a state where the diameter of one end is larger and the diameter of the other end is smaller, so that when the external air flows into the ventilation channel, a certain narrow tube effect can be generated, thereby accelerating the flow of air and improving the cooling rate.

[0007] In the aforementioned planetary roller screw with good cooling effect, a plurality of annular evenly distributed reinforcing ribs are provided in the cooling liquid cavity; the reinforcing ribs can improve the structural strength of the entire clamping member, thereby ensuring the structural strength of the planetary ball screw.

[0008] In the aforementioned planetary roller screw with good cooling effect, a first threaded section is provided on the inner side wall of the liquid inlet, and a nut seat is threadedly installed on the first threaded section; a second threaded section is provided on the inner side wall of the nut seat, and a liquid inlet pipe is rotatably installed on the second threaded section; the thread direction of the second threaded section is opposite to the thread direction of the first threaded section; a first threaded section is also provided on the inner side wall of the liquid outlet, and a nut seat is also threadedly installed on the first threaded section; a second threaded section is also provided on the inner side wall of the nut seat, and a liquid outlet pipe is rotatably installed on the second threaded section; the use of the first threaded section and the second threaded section with opposite thread directions can ensure that the nut seat and the liquid inlet or liquid outlet slide during the installation process, thereby facilitating installation.

[0009] In the aforementioned planetary roller screw with good cooling effect, a first sealing ring is arranged between the nut seat and the liquid inlet, and a first sealing ring is also arranged between the nut seat and the liquid outlet; a second sealing ring is arranged between the liquid inlet pipe and the nut seat, and between the liquid outlet pipe and the nut seat; the first sealing ring and the second sealing ring can ensure the sealing effect between the liquid inlet and the liquid inlet pipe, and between the liquid outlet and the liquid outlet pipe, thereby avoiding the outflow of internal coolant and ensuring stability in use.

[0010] Compared with the prior art, the present invention improves the existing planetary ball screw by providing a cooling liquid chamber in the clamping part, and providing a liquid inlet and a liquid outlet on the cooling liquid chamber, so that the cooling liquid in the cooling liquid chamber can be circulated by utilizing an external cooling liquid circulation system, thereby enabling the internal coolant to perform the first level of cooling on the intermediate screw and the roller body; combined with the ventilation channel provided on the gear ring, the air between the clamping part and the intermediate screw can flow, thereby realizing air cooling of the intermediate screw and the roller body, and utilizing the mutual cooperation of air cooling and water cooling to improve the cooling effect and cooling rate of the entire planetary ball screw. In addition, the present invention also provides a ventilation duct with a larger diameter at one end and a smaller diameter at the other end, with the larger diameter end being arranged on the outside and the smaller diameter end being arranged on the inside, so that when external air flows into the ventilation duct, a certain narrow tube effect can be generated, thereby accelerating the flow of air and improving the cooling rate; a plurality of annular evenly distributed reinforcing ribs are provided in the cooling liquid chamber, and the reinforcing ribs can be used to improve the structural strength of the entire clamping member, thereby ensuring the structural strength of the planetary ball screw; a liquid inlet pipe and a liquid outlet pipe are respectively threadedly installed on the liquid inlet and the liquid outlet through a first thread segment, a nut seat, and a second thread segment, and the first thread segment and the second thread segment, with the threads facing opposite directions, can ensure that the nut seat and the liquid inlet or the liquid outlet slide during installation, thereby facilitating installation; a first sealing ring and a second sealing ring are provided to ensure a sealing effect between the liquid inlet and the liquid inlet pipe, and between the liquid outlet and the liquid outlet pipe, thereby preventing the internal coolant from flowing out, thereby ensuring stability in use. Therefore, the present invention can not only improve the cooling effect, but also has the advantages of fast cooling rate, high structural strength, easy installation, and high stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;

[0013] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle.

[0014] The markings in the accompanying drawings are: 1-intermediate screw, 2-gear ring, 3-clamping member, 4-roller body, 5-liquid inlet, 6-liquid outlet, 7-cooling liquid chamber, 8-ventilation channel, 9-reinforcement rib, 10-nut seat, 11-liquid inlet pipe, 12-liquid outlet pipe, 13-first sealing ring, 14-second sealing ring. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0016] Example. A planetary roller screw with good cooling effect is constructed as follows Figures 1 to 3 As shown, it includes an intermediate screw 1, a ring gear 2, a clamping member 3 and a plurality of roller bodies 4. A liquid inlet 5 and a liquid outlet 6 are symmetrically provided on the bottom surface of the clamping member 3. A cooling liquid cavity 7 is provided in the clamping member 3, and the cooling liquid cavity 7 is connected with the liquid inlet 5 and the liquid outlet 6; a plurality of annular and evenly distributed ventilation channels 8 are provided through the ring gear 2.

[0017] The diameter of the end of each ventilation channel 8 near the roller body 4 is smaller than the diameter of the end of the ventilation channel 8 away from the roller body 4; a plurality of annular evenly distributed reinforcing ribs 9 are provided in the cooling liquid chamber 7; a first threaded section is provided on the inner side wall of the liquid inlet 5, and a nut seat 10 is threadedly installed on the first threaded section; a second threaded section is provided on the inner side wall of the nut seat 10, and a liquid inlet pipe 11 is rotatably installed on the second threaded section; the thread direction of the second threaded section is opposite to that of the first threaded section; a first threaded section is also provided on the inner side wall of the liquid outlet 6, and a nut seat 10 is also threadedly installed on the first threaded section; a second threaded section is also provided on the inner side wall of the nut seat 10, and a liquid outlet pipe 12 is rotatably installed on the second threaded section; a first sealing ring 13 is provided between the nut seat 10 and the liquid inlet 5, and a first sealing ring 13 is also provided between the nut seat 10 and the liquid outlet 6; a second sealing ring 14 is provided between the liquid inlet pipe 11 and the nut seat 10, and between the liquid outlet pipe 12 and the nut seat 10.

[0018] Working principle: When cooling the planetary ball screw, it is only necessary to install the liquid inlet pipe 11 and the liquid outlet pipe 12 on the nut seat 10 of the liquid inlet 5 and the nut seat 10 of the liquid outlet 6 respectively, and then input coolant into the liquid inlet pipe 11 through the external coolant circulation device. The coolant will enter the cooling liquid cavity 7 through the liquid inlet pipe 11, and the coolant will flow in the cooling liquid cavity 7 and slowly flow toward the liquid outlet 6. The coolant flowing in the cooling liquid cavity 7 can be used to cool the clamping member 3, the roller body 4 and the intermediate screw 1; at the same time, when the clamping member 3 and the intermediate screw 1 are When the temperature between the internal and external environments is higher than the external environment temperature, the temperature difference between the internal and external environments will cause the external air to flow between the clamping member 3 and the intermediate screw 1 through the ventilation channel 8; and because the interface of the ventilation channel 8 is frustum-shaped, the air will produce a certain narrow tube effect in the ventilation channel 8, and then the air can flow quickly between the clamping member 3 and the intermediate screw 1, thereby realizing the cooling of the intermediate screw 1 and the roller body 4, and utilizing the cooperation of air cooling and coolant cooling to achieve the purpose of rapid cooling of the planetary ball screw, thereby improving the cooling rate and cooling effect.

Claims

1. A planetary roller screw with good cooling effect, comprising an intermediate screw (1), a gear ring (2), a clamping member (3) and a plurality of roller bodies (4), characterized in that: A liquid inlet (5) and a liquid outlet (6) are symmetrically provided on the bottom surface of the clamping member (3); a cooling liquid cavity (7) is provided in the clamping member (3); the cooling liquid cavity (7) is communicated with the liquid inlet (5) and the liquid outlet (6); and a plurality of annular evenly distributed ventilation channels (8) are provided through the gear ring (2).

2. The planetary roller screw with good cooling effect according to claim 1, characterized in that: The diameter of the end of each ventilation channel (8) close to the roller body (4) is smaller than the diameter of the end of the ventilation channel (8) far from the roller body (4).

3. The planetary roller screw with good cooling effect according to claim 1, characterized in that: A plurality of evenly distributed annular reinforcement ribs (9) are provided in the cooling liquid cavity (7).

4. The planetary roller screw with good cooling effect according to any one of claims 1 to 3, characterized in that: The inner side wall of the liquid inlet (5) is provided with a first threaded section, on which a nut seat (10) is threadedly mounted; the inner side wall of the nut seat (10) is provided with a second threaded section, on which a liquid inlet pipe (11) is rotatably mounted; the thread direction of the second threaded section is opposite to that of the first threaded section; the inner side wall of the liquid outlet (6) is also provided with a first threaded section, on which a nut seat (10) is also threadedly mounted; the inner side wall of the nut seat (10) is also provided with a second threaded section, on which a liquid outlet pipe (12) is rotatably mounted.

5. The planetary roller screw with good cooling effect according to claim 4, characterized in that: A first sealing ring (13) is provided between the nut seat (10) and the liquid inlet (5), and a first sealing ring (13) is also provided between the nut seat (10) and the liquid outlet (6); a second sealing ring (14) is provided between the liquid inlet pipe (11) and the nut seat (10), and between the liquid outlet pipe (12) and the nut seat (10).

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