Screw nut cooling sleeve and screw rod transmission mechanism

Abstract

The utility model discloses a nut cooling jacket and a lead screw transmission mechanism, the nut cooling jacket comprises a cooling sleeve and two fastening parts, the cooling sleeve defines a hollow cavity, the hollow cavity is used for embedding a lead screw nut, the cooling sleeve is provided with an opening, the opening penetrates through the whole cooling sleeve in the axial direction of the cooling sleeve, and the two fastening parts are arranged on the cooling sleeve. The two fastening parts are located on the two sides of the opening correspondingly and used for closing the opening. Heating of the lead screw nut is cooled and controlled through the nut cooling sleeve, rapid cooling of the lead screw is achieved, deformation of the lead screw in the machining process is avoided, and therefore the machining precision of the lead screw can be improved, the fastening parts are arranged on the two sides of the opening of the cooling sleeve, the cooling sleeve can be tightly fixed to the lead screw nut through the fastening parts, and the machining precision of the lead screw is improved. Installation is convenient, firm and reliable.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ball screws, in particular to a screw nut cooling sleeve and a screw rod transmission mechanism. BACKGROUND

[0002] A ball screw pair is a kind of high-precision and high-stability transmission device. In some high-precision equipment, the screw rod will be elongated to a certain extent due to thermal expansion and cold contraction of the screw rod during long-time operation, thereby affecting the running accuracy of the ball screw pair.

[0003] A screw rod cooling system is a device for controlling the working temperature of a screw rod. In many high-precision mechanical equipment, the running accuracy of the screw nut is crucial to the overall performance of the equipment, and temperature changes will significantly affect the accuracy of the screw nut. The screw rod cooling system removes the heat generated by the operation of the screw nut through a cooling medium, thereby stabilizing the temperature of the screw nut.

[0004] The existing screw rod cooling system usually makes the screw rod hollow, and cools it by circulating cooling liquid in the screw rod. For example, application No. 202410565848.2 discloses a screw rod constant temperature cooling system, which comprises a screw rod assembly, a driving motor and a liquid cooling machine. The screw rod assembly comprises a screw rod and a screw nut rotatably connected to the outer side of the screw rod, and the screw rod is provided with a screw rod through hole along the axial direction. The driving motor comprises a motor shaft, the motor shaft penetrates the driving motor, and the motor shaft is provided with a shaft through hole along the axial direction. The screw rod is sealingly connected with the motor shaft, and the screw rod through hole is in communication with the shaft through hole. The liquid cooling machine is used for making the cooling liquid flow through the screw rod through hole and the shaft through hole. The liquid cooling machine can make the cooling liquid flow through the screw rod through hole and the shaft through hole, remove the heat generated by the high-speed rotation of the motor and the friction between the screw nut and the screw rod, and keep the screw rod in a constant temperature state.

[0005] Since the screw rod needs to rotate during operation, the cooling liquid circulation pipeline needs to be rotationally sealed with the screw rod, which increases the overall manufacturing difficulty of the device and greatly increases the manufacturing cost and service life.

[0006] Therefore, the prior art needs to be improved. CONTENT OF THE INVENTION

[0007] The application aims to provide a screw nut cooling sleeve and a screw rod transmission mechanism, and aims to solve the technical problem of how to reduce the influence of thermal expansion and cold contraction of the screw rod on the accuracy of the screw rod in the prior art.

[0008] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0009] In a first aspect, the application provides a screw nut cooling sleeve, which comprises:

[0010] a cooling sleeve, the cooling sleeve defining a hollow cavity for embedding a lead screw nut, and the cooling sleeve having an opening penetrating through the cooling sleeve along an axial direction of the cooling sleeve;

[0011] two fastening portions, the two fastening portions being respectively located at two sides of the opening, and the two fastening portions being used for closing the opening.

[0012] In an embodiment, the cooling sleeve comprises:

[0013] a sleeve body;

[0014] a first liquid cooling flow channel, the first liquid cooling flow channel being arranged in the sleeve body;

[0015] a first liquid inlet, the first liquid inlet being arranged in the sleeve body, and the first liquid inlet being in communication with the first liquid cooling flow channel;

[0016] a first liquid outlet, the first liquid outlet being arranged in the sleeve body, and the first liquid outlet being in communication with an end of the first liquid cooling flow channel away from the first liquid inlet.

[0017] In an embodiment, the first liquid cooling flow channel comprises a left-side liquid cooling flow channel and a right-side liquid cooling flow channel in communication with the left-side liquid cooling flow channel, the left-side liquid cooling flow channel being located at a left side of the cooling sleeve, and the right-side liquid cooling flow channel being located at a right side of the cooling sleeve.

[0018] In an embodiment, the left-side liquid cooling flow channel comprises a plurality of S-shaped flow channels in sequence communication; and the right-side liquid cooling flow channel comprises a plurality of S-shaped flow channels in sequence communication.

[0019] In an embodiment, a pipe diameter of the first liquid cooling flow channel is 3-5 mm.

[0020] In an embodiment, a spacing between two adjacent flow channels in the S-shaped flow channel is 5-7 mm.

[0021] In an embodiment, the fastening portion comprises:

[0022] a fastening body, the fastening body being formed by extending radially outwardly along the cooling sleeve;

[0023] a mounting hole, the mounting hole being formed in the fastening body, and the mounting hole being used for fixedly connecting with a bolt to achieve closing the opening.

[0024] In an embodiment, the fastening portion further comprises:

[0025] A gradual connection part is connected to the fastening body and the cooling sleeve, and the cross-sectional size of the gradual connection part gradually increases from the cooling sleeve to the opening side.

[0026] In an embodiment, the cooling sleeve and the two fastening parts are integrally formed.

[0027] In a second aspect, the application further provides a lead screw transmission mechanism, which comprises the lead nut cooling sleeve as described in the above embodiments. Therefore, the lead screw transmission mechanism can have all the technical features and beneficial effects of the lead nut cooling sleeve, which will not be repeated here.

[0028] The lead nut cooling sleeve and the lead screw transmission mechanism provided by the application have at least the following beneficial effects:

[0029] The application discloses a lead nut cooling sleeve and a lead screw transmission mechanism, wherein the lead nut cooling sleeve comprises a cooling sleeve and two fastening parts, the cooling sleeve defines a hollow cavity for embedding a lead screw nut, and the cooling sleeve has an opening penetrating through the entire cooling sleeve along the axial direction of the cooling sleeve, and the two fastening parts are respectively located on both sides of the opening and used for closing the opening. The lead nut cooling sleeve can cool and control the heat generation of the lead screw nut, realize the rapid cooling of the lead screw, avoid the deformation of the lead screw during the machining process, and thus improve the machining precision of the lead screw. In addition, the fastening parts are arranged on both sides of the opening of the cooling sleeve, and the fastening parts can tightly fix the cooling sleeve on the lead screw nut, so that the lead screw nut is conveniently and reliably installed. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 The structural schematic diagram of the lead screw transmission mechanism provided by the embodiments of the application is shown in the figure;

[0032] Figure 2 The structural schematic diagram of the lead nut cooling sleeve provided by the embodiments of the application is shown in the figure;

[0033] Figure 3 The assembly schematic diagram of the lead nut cooling sleeve and the lead screw nut provided by the embodiments of the application is shown in the figure;

[0034] Figure 4 The structural schematic diagram of the first liquid cooling flow channel provided by the embodiments of the application is shown in the figure.

[0035] In the drawings:

[0036] 100, cooling sleeve; 200, fastening part; 300, screw nut; 110, sleeve body; 120, hollow cavity; 130, opening; 140, first liquid cooling flow channel; 150, first liquid inlet; 160, first liquid outlet; 141, left liquid cooling flow channel; 142, right liquid cooling flow channel; 143, S-shaped flow channel; 210, fastening body; 220, mounting hole; 230, gradually changing connecting part. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0038] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for the convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second" are only for the convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0039] Embodiment 1:

[0040] Referring to Figure 1 and Figure 2 The present embodiment provides a cooling sleeve for screw nut, which comprises a cooling sleeve 100 and two fastening parts 200. The cooling sleeve 100 defines a hollow cavity 120 for embedding a screw nut 300, and has an opening 130 extending through the entire cooling sleeve 100 along the axial direction of the cooling sleeve 100. The two fastening parts 200 are respectively located on both sides of the opening 130, and are used to close the opening 130.

[0041] Referring to Figure 3In the embodiment, the nut cooling sleeve is arranged on the screw nut 300 of the screw driving mechanism, and the nut cooling sleeve can utilize the circulating cooling medium to take away the heat generated by the screw nut 300 due to friction during operation through heat exchange, so as to ensure that the screw nut 300 works in a suitable temperature range and maintain its accuracy and performance.

[0042] The cooling sleeve 100 has an opening 130 penetrating through the cooling sleeve 100 along the axial direction of the cooling sleeve 100, and two fastening parts 200 are respectively arranged on the two sides of the opening 130. When the cooling sleeve 100 is installed, the cooling sleeve 100 can be sleeved on the predetermined position of the screw nut 300, and then the two fastening parts 200 can be fixed by bolts to tightly fix the cooling sleeve 100 on the screw nut 300. The structure is simple, convenient to install, and reliable. The opening 130 can greatly simplify the installation process and improve work efficiency. At the same time, the fastening part 200 can ensure the tightness and reliability of the connection between the cooling sleeve 100 and the screw nut 300, and thus can ensure that the cooling sleeve 100 can effectively cool the screw nut 300 and ensure the machining accuracy of the screw.

[0043] Therefore, the screw nut 300 is cooled and controlled by the nut cooling sleeve in the embodiment, the rapid cooling of the screw is realized, the deformation of the screw during machining is avoided, the machining accuracy of the screw is improved, and the opening 130 of the cooling sleeve 100 is provided with the fastening part 200 on both sides. The cooling sleeve 100 can be tightly fixed on the screw nut 300 by the fastening part 200, which is convenient to install and reliable.

[0044] Specifically, referring to Figure 2 The fastening body 210 extends radially outwardly, and the mounting hole 220 is arranged in the fastening body 210 and is used for fixed connection with a bolt to close the opening 130.

[0045] In the embodiment, the mounting hole 220 is arranged on the fastening body 210 and is used for fixed connection with a bolt. It can be understood that the mounting hole 220 can be a threaded hole. When the nut cooling sleeve and the screw nut 300 are installed, the size of the hollow cavity 120 of the nut cooling sleeve is slightly larger than the outer diameter of the screw nut 300. The nut cooling sleeve can be sleeved on the screw nut 300, and then the bolt and the mounting hole 220 are connected together to lock the fastening part 200, so that the fastening body 210 is tightly fixed on the screw nut 300. The installation is convenient, and the heat dissipation effect is good.

[0046] Specifically, referring to Figure 2The fastening part 200 further comprises a gradual connection part 230 connected to the fastening body 210 and the cooling sleeve 100, and the cross-sectional size of the gradual connection part 230 gradually increases from the cooling sleeve 100 to the opening 130 side.

[0047] In the embodiment, the gradual connection part 230 can significantly reduce the stress concentration of the cooling sleeve 100, so that the stress distribution of the fastening part 200 position is more uniform, and the local stress is avoided to be too high.

[0048] Specifically, the cooling sleeve 100 and the two fastening parts 200 are integrally formed, the structural strength is high, and the production process can be simplified and the cost can be reduced.

[0049] Specifically, referring to Figure 2 and Figure 4 , the cooling sleeve 100 comprises a sleeve body 110, a first liquid cooling channel 140, a first liquid inlet 150 and a first liquid outlet 160. The first liquid cooling channel 140 is arranged in the sleeve body 110, the first liquid inlet 150 is arranged in the sleeve body 110, the first liquid inlet 150 is in communication with the first liquid cooling channel 140, the first liquid outlet 160 is arranged in the sleeve body 110, and the first liquid outlet 160 is in communication with one end of the first liquid cooling channel 140 away from the first liquid inlet 150.

[0050] In the embodiment, the first liquid cooling channel 140 is arranged in the sleeve body 110, and the first liquid cooling channel 140 is in communication with the first liquid inlet 150 and the first liquid outlet 160, respectively. It can be understood that the cooling liquid can enter the first liquid cooling channel 140 from the first liquid inlet 150 and flow out from the first liquid outlet 160, so as to take away the heat on the sleeve body 110, so as to realize the cooling of the screw nut 300, and ensure that the screw nut 300 works in a suitable temperature range, so as to maintain its precision and performance.

[0051] Specifically, referring to Figure 4 , the first liquid cooling channel 140 comprises a left liquid cooling channel 141 and a right liquid cooling channel 142 in communication with the left liquid cooling channel 141. The left liquid cooling channel 141 is located on the left side of the cooling sleeve 100, and the right liquid cooling channel 142 is located on the right side of the cooling sleeve 100.

[0052] In the embodiment, the first liquid cooling flow channel 140 includes a left liquid cooling flow channel 141 and a right liquid cooling flow channel 142. It can be understood that the cooling sleeve 100 has a proximal end and a distal end. Taking the case where the first liquid inlet 150 is located at the proximal end, the first liquid inlet 150 can be in communication with the left liquid cooling flow channel 141, the left liquid cooling flow channel 141 extends from the proximal end to the distal end, the right liquid cooling flow channel 142 is in communication with the left liquid cooling flow channel 141 at the distal end, and the right liquid cooling flow channel 142 extends from the distal end to the proximal end. The right liquid cooling flow channel 142 is in communication with the first liquid outlet 160 at the proximal end, that is, the first liquid inlet 150 and the first liquid outlet 160 are both located at the proximal end, which can facilitate the arrangement of pipelines and the installation and maintenance.

[0053] Specifically, referring to Figure 4 , the left liquid cooling flow channel 141 includes a plurality of S-shaped flow channels 143 in sequence; and the right liquid cooling flow channel 142 includes a plurality of S-shaped flow channels 143 in sequence.

[0054] In the embodiment, the S-shaped flow channel 143 can prolong the flow path of the cooling liquid, increase the area of contact between the screw nut and the cooling surface, and improve the heat exchange efficiency. At the same time, the S-shaped flow channel 143 causes more turbulent flow of the cooling liquid when flowing, breaks the laminar boundary layer, and improves the heat transfer efficiency. In addition, the S-shaped flow channel 143 can make the cooling liquid more uniformly distributed, avoid local overheating, and ensure the overall temperature consistency of the screw nut 300.

[0055] Specifically, the pipeline diameter of the first liquid cooling flow channel 140 is 3-5 mm.

[0056] In the embodiment, the pipeline size of the first liquid cooling flow channel 140 directly affects the flow rate and pressure of the cooling liquid. For example, under the same pumping power, an increase in the pipeline diameter increases the flow rate of the cooling liquid, thereby improving the overall heat dissipation capacity. However, an increase in the pipeline diameter leads to a decrease in flow resistance and a decrease in pressure drop, thereby reducing the power consumption of the pump. Therefore, the pipeline diameter needs to be designed to meet the balance point between the flow rate and the pressure drop. In the embodiment, the pipeline diameter of the first liquid cooling flow channel 140 is 3-5 mm, which is reasonable in design and can achieve efficient liquid cooling heat dissipation effect.

[0057] Specifically, the distance between two adjacent flow channels in the S-shaped flow channel 143 is 5-7 mm.

[0058] In the embodiment, the distance between two adjacent flow channels in the S-shaped flow channel 143 is small, the flow channels are dense, the number of flow channels per unit area is increased, the heat dissipation area is increased, and the heat dissipation efficiency is improved. However, the dense flow channels increase the flow resistance, leading to an increase in pressure drop and an increase in pump power demand. In the embodiment, the distance between two adjacent flow channels in the S-shaped flow channel 143 is 5-7 mm, which is moderate and helps to uniformly distribute heat and reduce local overheating, thereby achieving high heat dissipation efficiency.

[0059] Embodiment 2:

[0060] The application also provides a lead screw transmission mechanism comprising the lead nut cooling sleeve of the above embodiments. The lead screw transmission mechanism can have all the technical features and advantages of the lead nut cooling sleeve described above, which will not be repeated here.

[0061] In summary, the application discloses a lead nut cooling sleeve and a lead screw transmission mechanism. The lead nut cooling sleeve comprises a cooling sleeve and two fastening parts. The cooling sleeve defines a hollow cavity for embedding a lead screw nut. The cooling sleeve has an opening extending through the cooling sleeve along the axial direction of the cooling sleeve. The two fastening parts are respectively located on both sides of the opening and used to close the opening. The lead nut cooling sleeve can cool and control the heat generated by the lead screw nut, realize the rapid cooling of the lead screw, avoid the deformation of the lead screw during the machining process, and thus improve the machining precision of the lead screw. The opening of the cooling sleeve is provided with fastening parts on both sides, which can tightly fix the cooling sleeve on the lead screw nut, and the installation is convenient, firm and reliable.

[0062] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A threaded bush cooling jacket characterized by, The application relates to a cooling sleeve for a lead screw nut. The cooling sleeve comprises: a sleeve body; 2. The wire-bar cooling jacket of claim 1, wherein a first liquid cooling flow channel arranged in the sleeve body; a first liquid inlet arranged in the sleeve body and communicating with the first liquid cooling flow channel; a first liquid outlet arranged in the sleeve body and communicating with the first liquid cooling flow channel at a position away from the first liquid inlet. The first liquid cooling flow channel comprises a left liquid cooling flow channel and a right liquid cooling flow channel communicating with the left liquid cooling flow channel, the left liquid cooling flow channel being arranged at the left side of the cooling sleeve, and the right liquid cooling flow channel being arranged at the right side of the cooling sleeve. The left liquid cooling flow channel comprises a plurality of S-shaped flow channels communicating with each other in sequence.

3. The wire-bar cooling jacket of claim 2, wherein The right liquid cooling flow channel comprises a plurality of S-shaped flow channels communicating with each other in sequence.

4. The wire-bar cooling jacket of claim 3, wherein The diameter of the pipeline of the first liquid cooling flow channel is 3-5 mm.

5. The wire-bar cooling jacket of claim 2, wherein The distance between two adjacent S-shaped flow channels is 5-7 mm.

6. The wire-bar cooling jacket of claim 4, wherein The fastening part comprises:

7. The wire-bar cooling jacket of claim 1 wherein, a fastening body extending radially outward from the cooling sleeve; a mounting hole arranged in the fastening body and used for being fixedly connected with a bolt to close the opening. The fastening part further comprises:

8. The wire-bar cooling jacket of claim 7, wherein, a gradually-changing connecting part connected with the fastening body and the cooling sleeve, the gradually-changing connecting part gradually increasing in cross-sectional size from the cooling sleeve to the side of the opening. The cooling sleeve and the two fastening parts are integrally formed.

9. The wire-bar cooling jacket of claim 1 wherein, The application further relates to a lead screw nut cooling sleeve comprising any one of the above-mentioned cooling sleeves.

10. A leadscrew drive mechanism, characterized by, ​

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