A ball screw pair quick-connect internal cooling assembly

Abstract

This invention relates to a quick-connect internal cooling assembly for ball screw pairs, belonging to the technical field of ball screw pairs. The ball screw pair includes a screw, a nut that mates with the screw, and a ball circulation chain disposed between the screw and the nut. The internal cooling assembly is fitted onto the outside of the nut and includes a detachable cooling sleeve connected to the nut and a main circulator and a secondary circulator disposed at both ends of the cooling sleeve. Channels within the cooling sleeve, the main circulator, and the secondary circulator together form a circulation channel. The circulation channel has a coolant inlet and a coolant outlet corresponding to the main circulator. The internal cooling assembly of this invention has an independent structure and can be installed outside the ball nut of the ball screw pair. It allows for quick-connect installation without modifying the screw or nut structure, does not interfere with the normal operation of the ball circulation chain, return mechanism, and dustproof device, and does not change the original installation dimensions and motion of the ball screw pair. This significantly improves the structural versatility and adaptability, enabling convenient and quick internal cooling modification of ordinary ball screw pairs.

Description

Technical Field

[0001] This invention relates to a quick-connect internal cooling assembly for ball screw pairs, belonging to the technical field of ball screw pairs. Background Technology

[0002] A ball screw assembly is a device that drives the linear motion of a nut through the rotation of a screw, commonly used in transmission and positioning fields. With the increasing demand for high-precision and high-efficiency machining in manufacturing, ball screw assemblies have been widely used in CNC machine tools, aerospace equipment, and precision instruments. However, with the current demand for high-speed CNC equipment, traditional ball screw assemblies suffer from heat generation at high speeds, affecting their transmission accuracy. Therefore, it is necessary to consider introducing external cooling methods to reduce the temperature of the ball screw assembly.

[0003] Existing technologies include drilling a hole in the middle of the ball screw to allow coolant to pass through, and drilling a hole in the nut of the ball screw assembly. However, due to the typical customized production of ball screw assemblies, the versatility of this type of structural design is not strong. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention proposes an internal cooling assembly that can be quickly connected to a ball screw assembly.

[0005] To achieve the above objectives, the technical solution proposed by the present invention is as follows: a ball screw pair quick-connect internal cooling assembly, wherein the ball screw pair includes a screw, a nut that cooperates with the screw, and a ball circulation chain disposed between the screw and the nut, the internal cooling assembly is sleeved on the outside of the nut, and includes a detachable cooling sleeve connected to the nut and a main circulator and a secondary circulator disposed at both ends of the cooling sleeve, the channels in the cooling sleeve, the main circulator and the secondary circulator together form a circulation channel, and the circulation channel is provided with a coolant inlet and a coolant outlet corresponding to the main circulator.

[0006] A further design of the above technical solution is as follows: the cooling jacket is provided with annular grooves at both ends for the main circulator and the auxiliary circulator to be embedded, and the main circulator and the auxiliary circulator are in the shape of annular grooves that match the corresponding annular grooves.

[0007] The cooling jacket has several cooling channels arranged axially on its tube wall, and the main circulator and the auxiliary circulator have several cooling grooves arranged circumferentially and communicating with the cooling channels. The cooling channels and cooling grooves together form a circulation channel.

[0008] The cooling tank is connected to at least two adjacent cooling channels.

[0009] The cooling jacket has an even number of cooling channels, and the cooling slots on the main circulator and the auxiliary circulator are connected to two adjacent cooling channels.

[0010] The coolant inlet and coolant outlet on the main circulator are both arranged along the axial direction of the main circulator and are respectively connected to a cooling channel.

[0011] The cooling jacket has an installation part on the inner side of one end of the main circulator, and the installation part has several internal cooling component installation holes for connecting with the end face of the nut; the bottom surface of the annular groove at both ends of the cooling jacket is respectively provided with main circulator installation holes and auxiliary circulator installation holes.

[0012] The mounting holes for the internal cooling components on the cooling jacket are evenly distributed circumferentially along the mounting portion.

[0013] A sealing gasket is provided between the cooling jacket and the main circulator, and between the cooling jacket and the auxiliary circulator. The sealing gasket has a through hole corresponding to the cooling channel.

[0014] The nut is equipped with a return device and a dustproof device at both ends.

[0015] Compared with the prior art, the present invention has the following advantages: This invention provides a quick-connect internal cooling assembly for small and medium-sized ball screw assemblies. The assembly has an independent structure and can be installed on the outside of the ball nut of the small and medium-sized ball screw assembly. It is quick-connect installed without modifying the structure of the screw or nut body, and does not interfere with the normal operation of the ball circulation chain, return mechanism and dustproof device. It does not change the original installation size and motion mode of the screw assembly, thereby significantly improving the versatility and adaptability of the structure. The assembly can be disassembled and installed separately, making maintenance and replacement convenient, and realizing a convenient and quick internal cooling transformation of ordinary ball screw assemblies.

[0016] Multiple liquid cooling channels are evenly distributed around the circumference inside the cooling jacket; the main circulator and the auxiliary circulator together form a continuous and closed circulating cooling circuit; the coolant can flow back and forth in multiple channels, forming a large-area heat exchange with the outer surface of the ball nut.

[0017] In this embodiment, the coolant inlet and outlet can be interchanged to adapt to different machine tool spaces and piping layouts. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the ball screw assembly of the present invention; Figure 2 for Figure 1 A quarter section view; Figure 3 for Figure 1 Exploded view; Figure 4 A quarter-section view of the internal cooling assembly; Figure 5 This is a cross-sectional view of the internal cooling assembly; Figure 6 This is a side view of the internal cooling assembly; Figure 7 This is an exploded view of the internal cooling assembly; Figure 8 This is an isometric view of the cooling sleeve. Figure 9 This is a cross-sectional view of the cooling jacket; Figure 10 Left view of the cooling sleeve; Figure 11 This is a right view of the cooling jacket; Figure 12 Isometric view of the main circulator; Figure 13 The right view of the main looper; Figure 14 Left view of the main looper; Figure 15 A cross-sectional view of the main looper; Figure 16 Axonometric view of the secondary circulator; Figure 17 This is the left view of the sub-circuit; Figure 18 This is the right view of the sub-circuit; Figure 19 This is a schematic diagram of a sealing gasket; Figure 20 This is a schematic diagram of the circulation channel; In the diagram: 1-Cooling jacket, 2-Main circulator, 3-Secondary circulator, 4-Sealing gasket, 5-Mounting screw, 6-Internal cooling assembly, 7-Ball nut, 8-Lead screw, 71-Return device, 72-Dustproof device, 9-Ball circulation chain, 11-Cooling channel, 12-Main circulator mounting hole, 13-Internal cooling assembly mounting hole, 14-Sink tank one, 15-Sink tank two, 16-Secondary circulator mounting hole, 21-Cooling tank, 22-Mounting hole, 23-Coolant inlet, 24-Coolant outlet, 31-Cooling tank, 32-Mounting hole, 41-Cooling through hole, 42-Mounting through hole. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The accompanying drawings are schematic diagrams or conceptual diagrams, and the relationships between the thickness and width of each part, as well as the proportional relationships between each part, etc., are not entirely consistent with their actual values. Example

[0021] The ball screw pair quick-connect internal cooling assembly of this embodiment, such as Figure 1 As shown, it includes a lead screw 8 and a ball nut 7 that mates with the lead screw 8. (Combined) Figure 2 and Figure 3 As shown, the ball nut 7 is fitted onto the lead screw 1 and is connected to it via a ball recirculation chain 9. The rotation of the lead screw 8 can drive the ball nut 7 to move linearly relative to the lead screw 8.

[0022] The outer wall of the lead screw 8 is provided with a lead screw raceway, and the inner wall of the ball nut 7 is provided with a nut raceway. The nut raceway and the lead screw raceway cooperate to form a cavity for the balls. Reverse devices 71 are installed at both ends of the ball nut 7. Reverse devices 71 are provided with reverse raceways to ensure that the balls form a loop. The nut raceway, the lead screw raceway, and the reverse raceway together form a ball raceway that accommodates the ball circulation chain 9. Dustproof devices 72 are also installed at both ends of the ball nut 7 to prevent external dust from entering the interior.

[0023] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an internal cooling assembly 6 is detachably fitted outside the ball nut 7. The internal cooling assembly 6 includes a cooling sleeve 1 fitted outside the ball nut 7. The cooling sleeve 1 has a main circulator 2 and a secondary circulator 3 at both ends.

[0024] Combination Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, the cooling jacket 1 is cylindrical, with an annular groove 14 for accommodating the main circulator 2 and an annular groove 15 for accommodating the auxiliary circulator 3 at both ends. The cooling jacket 1 has several axially arranged cooling channels 11 on its wall. Each cooling channel 11 is a through hole penetrating both ends of the cooling jacket 1, with its ends located on the bottom surfaces of grooves 14 and 15 respectively; that is, the bottom surfaces of these grooves are the planes on which the cooling channels 11 are machined. In this embodiment, eight cooling channels 11 are evenly distributed around the circumference of the cooling jacket 1. The bottom surface of groove 14 also has a main circulator mounting hole 12 for fixing the main circulator 2 to the cooling jacket 1 using mounting screws 5. Correspondingly, the bottom surface of groove 15 also has an auxiliary circulator mounting hole 16 for fixing the auxiliary circulator 4 to the cooling jacket 1 using mounting screws 5.

[0025] The cooling sleeve 1 has an installation part on the inner side of one end corresponding to the main circulator 2. When the cooling sleeve 1 is put on the nut, the installation part abuts against the end face of the ball nut 7. The installation part is provided with several internal cooling component installation holes 13 for connecting with the end face of the nut.

[0026] Combination Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, the main circulator 2 is annular and matches the sink 14. The main circulator 2 is embedded in the sink 14. The main circulator 2 is provided with several cooling grooves 21 that communicate with the cooling channels 11. The cooling grooves 21 are arc-shaped grooves arranged circumferentially along the end face of the main circulator 2. The cooling grooves 21 communicate with at least two cooling channels 11. The main circulator 2 is also provided with a coolant inlet 23 and a coolant outlet 24 that are arranged axially through the main circulator. The coolant inlet 23 and the coolant outlet 24 are respectively connected to a cooling channel 11. The coolant inlet 23 and the coolant outlet 24 are threaded and can be connected to the upper-level cooling pump through pipelines. In this embodiment, three cooling grooves 21 are provided corresponding to the eight cooling channels 11. Each cooling groove 21 is connected to two cooling channels 11, and the two ends of the cooling groove 21 correspond to the positions of a cooling channel 11. The coolant inlet 23 and the coolant outlet 24 are arranged adjacent to each other on the same side of the main circulator 2. The main circulator 2 is also provided with mounting holes 22 for fixing the main circulator 2 to the cooling jacket 1 by screws.

[0027] In this embodiment, the cooling component and the ball nut can rotate relative to each other before the cooling component is fixed. When the direction of the ball nut is fixed, the positions of the coolant inlet 23 and the coolant outlet 24 are facing inward relative to the cooling pump, which makes it inconvenient to connect to the cooling pump pipeline. At this time, the relative position of the cooling component and the ball nut can be adjusted so that the coolant inlet 23 and the coolant outlet 24 of the cooling component face outward, which facilitates connection to the upstream cooling pump.

[0028] Combination Figure 16 , Figure 17 and Figure 18 As shown, the secondary circulator 3 is annular and matches the second sink 15. The secondary circulator 3 is embedded in the second sink 15. The secondary circulator 3 is also provided with several cooling grooves 21 that communicate with the cooling channels 11. The cooling grooves 21 on the secondary circulator 3 are also arc-shaped grooves arranged circumferentially along the end face of the secondary circulator 3. The cooling grooves 21 communicate with at least two cooling channels 11. In this embodiment, corresponding to the eight cooling channels 11, four cooling grooves 21 are evenly arranged circumferentially on the secondary circulator 3. Similarly, each cooling groove 21 on the secondary circulator 3 communicates with two cooling channels 11, and the two ends of the cooling groove 21 correspond to the positions of a cooling channel 11. The secondary circulator 3 is also provided with mounting holes 22 for fixing the secondary circulator 3 to the cooling sleeve 1 with screws.

[0029] In this embodiment, sealing gaskets 4 are provided between the cooling jacket and the main circulator, and between the cooling jacket and the auxiliary circulator, such as... Figure 19 As shown, the sealing gasket is provided with a cooling through hole 41 and a mounting through hole 42 corresponding to the cooling channel and the mounting hole, respectively. The cooling through hole and the mounting through hole are set independently. The cooling through hole 41 is connected to the cooling channel and corresponds to it, ensuring that the liquid can pass through while preventing the liquid from leaking from the gap and avoiding the formation of a leakage path. The screws for installing the main and auxiliary circulators pass through the mounting through hole 42, which plays a positioning role and ensures that the position of the cooling through hole 41 remains relatively unchanged.

[0030] In this embodiment, the cooling channel 11 on the cooling jacket 1, together with the 21 on the main circulator and the auxiliary circulator at both ends, forms a continuous circulation channel for the coolant, such as... Figure 20 As shown, powerful cooling is achieved through external liquid cooling.

[0031] The cooling component and ball screw assembly in this embodiment are detachable and can be installed on ordinary ball screw assemblies without affecting the original structure and installation characteristics of the ball screw assembly. This makes it very convenient to realize the internal cooling transformation of ordinary ball screw assemblies and quickly adapt to the market demand for internally cooled ball screw assemblies.

[0032] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A quick-connect internal cooling assembly for a ball screw pair, the ball screw pair comprising a screw, a nut cooperating with the screw, and a ball circulation chain disposed between the screw and the nut, characterized in that: The internal cooling assembly is fitted on the outside of the nut and includes a detachable cooling sleeve connected to the nut and a main circulator and a secondary circulator located at both ends of the cooling sleeve. The channels in the cooling sleeve, the main circulator and the secondary circulator together form a circulation channel. The circulation channel has a coolant inlet and a coolant outlet corresponding to the main circulator.

2. The ball screw pair quick-connect internal cooling assembly according to claim 1, characterized in that: The cooling jacket has annular grooves at both ends for the main circulator and the auxiliary circulator to be embedded, and the main circulator and the auxiliary circulator are in the shape of annular grooves that match the corresponding annular grooves.

3. The ball screw pair quick-connect internal cooling assembly according to claim 2, characterized in that: The cooling jacket has several cooling channels arranged axially on its tube wall, and the main circulator and the auxiliary circulator have several cooling grooves arranged circumferentially and communicating with the cooling channels. The cooling channels and cooling grooves together form a circulation channel.

4. The ball screw pair quick-connect internal cooling assembly according to claim 3, characterized in that: The cooling tank is connected to at least two adjacent cooling channels.

5. The ball screw pair quick-connect internal cooling assembly according to claim 4, characterized in that: The cooling jacket has an even number of cooling channels, and the cooling slots on the main circulator and the auxiliary circulator are connected to two adjacent cooling channels.

6. The ball screw pair quick-connect internal cooling assembly according to claim 5, characterized in that: The coolant inlet and coolant outlet on the main circulator are both arranged along the axial direction of the main circulator and are respectively connected to a cooling channel.

7. The ball screw pair quick-connect internal cooling assembly according to claim 6, characterized in that: The cooling jacket has an installation part on the inner side of one end of the main circulator, and the installation part has several internal cooling component installation holes for connecting with the end face of the nut; the bottom surface of the annular groove at both ends of the cooling jacket is respectively provided with main circulator installation holes and auxiliary circulator installation holes.

8. The ball screw pair quick-connect internal cooling assembly according to claim 7, characterized in that: The mounting holes for the internal cooling components on the cooling jacket are evenly distributed circumferentially along the mounting portion.

9. The ball screw pair quick-connect internal cooling assembly according to any one of claims 3-8, characterized in that: A sealing gasket is provided between the cooling jacket and the main circulator, and between the cooling jacket and the auxiliary circulator. The sealing gasket has a through hole corresponding to the cooling channel.

10. The ball screw pair quick-connect internal cooling assembly according to claim 9, characterized in that: The nut is equipped with a return device and a dustproof device at both ends.

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