Cooling device for motorized spindle assembly

Abstract

The utility model discloses a motorized spindle assembly cooling device which comprises an outer cylinder of a motorized spindle, an annular protrusion and a strip-shaped protrusion are arranged on the outer side of the outer cylinder, a sleeve and an annular pressing plate are sleeved outside the whole of the outer cylinder and the strip-shaped protrusion, and grooves for the strip-shaped protrusion to penetrate through are formed in the inner side of the sleeve and the inner side of the annular pressing plate. The sleeve is located between the annular protrusion and the annular pressing plate, the rear end of the outer barrel is in threaded connection with a threaded barrel, and a detachable cylinder is installed outside the threaded barrel. The outer side of the outer barrel is provided with the strip-shaped protrusions distributed in the annular array mode, the inner side of the sleeve is provided with the grooves matched with the strip-shaped protrusions, the contact area of the outer barrel and the sleeve can be increased, and the efficiency that the outer barrel transmits heat to the sleeve is improved; the sleeve is fixed through threaded connection of the threaded cylinder and the outer cylinder, dismounting and mounting are convenient and fast, subsequent maintenance of the electric spindle by workers is facilitated, and the threaded cylinder can be conveniently and manually rotated by arranging the detachable cylinder outside the threaded cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric main shaft technical field, concretely relates to a kind of electric main shaft assembly cooling device. BACKGROUND

[0002] As the core component of modern high-precision machining equipment (such as CNC machine tools, machining centers, etc.), the performance of the electric spindle directly affects the machining precision, efficiency and equipment life. With the continuous progress of machining technology, the working speed and power density of the electric spindle are getting higher and higher, resulting in a large amount of heat generated during operation. If this heat cannot be effectively dissipated in time, it will cause the temperature of the electric spindle to rise, and then cause thermal deformation, precision decline, bearing wear and tear, etc. In severe cases, it may even cause the electric spindle to fail. The traditional electric spindle is mainly cooled by a cooling jacket on the outside of its outer cylinder. The inner wall of the cooling jacket is in contact with the outer wall of the outer cylinder, and the inside of the cooling jacket is provided with a passage for the flow of cooling medium. The heat of the electric spindle is carried away by the circulating cooling medium. However, the contact area between the traditional cooling jacket and the outer cylinder of the electric spindle is limited, resulting in low heat transfer efficiency and poor cooling effect. SUMMARY

[0003] The utility model aims at the deficiencies of prior art, and provides an electric spindle assembly cooling device to solve the problems raised in the background art.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] An electric spindle assembly cooling device, comprising an outer cylinder of an electric spindle, an annular protrusion and a plurality of axial strip-shaped protrusions are provided on the outer side of the outer cylinder, the annular protrusion is located at the front end of the outer cylinder, and the strip-shaped protrusions are arranged in an annular array on the outer side of the outer cylinder.

[0006] The outer cylinder and the strip-shaped protrusions are covered with a sleeve and an annular pressing plate on the outside, the inner side of the sleeve and the annular pressing plate is provided with a groove for the strip-shaped protrusions to pass through, the sleeve is located between the annular protrusion and the annular pressing plate, the outer side of the rear end of the outer cylinder is provided with external threads, and a threaded cylinder is connected by threads, and a detachable cylinder is installed on the outside of the threaded cylinder.

[0007] A plurality of axial through holes are provided on the side wall of the sleeve, connection grooves are provided at the front and rear ends of the sleeve, all the axial through holes are connected in sequence to form a whole medium channel through the connection grooves, and a medium inlet and a medium outlet are provided on the outside of the sleeve, and the medium inlet and the medium outlet are connected with the two ends of the medium channel respectively.

[0008] As a preferred solution of the electric spindle assembly cooling device, rubber gaskets are provided between the two ends of the sleeve and the annular protrusion and the annular pressing plate.

[0009] As a preferred scheme of the electric spindle assembly cooling device, the outer side of the threaded cylinder is provided with a threaded hole for connecting the cylinder.

[0010] As a preferred scheme of the electric spindle assembly cooling device, the front end of the cylinder is fixedly connected with a threaded column, which can be matched with the threaded hole on the outer side of the threaded cylinder.

[0011] As a preferred scheme of the electric spindle assembly cooling device, the medium inlet and the medium outlet are connected with an external cooling medium circulation system through a pipeline.

[0012] As a preferred scheme of the electric spindle assembly cooling device, the length of the strip-shaped protrusion is greater than the length of the sleeve, and the length of the strip-shaped protrusion is less than the overall length of the sleeve and the annular pressing plate.

[0013] As a preferred scheme of the electric spindle assembly cooling device, the inner wall of the sleeve is in contact with the outer wall of the outer cylinder, and the inner wall of the groove on the inner side of the sleeve is in contact with the outer wall of the strip-shaped protrusion.

[0014] As a preferred scheme of the electric spindle assembly cooling device, the sleeve is a copper sleeve.

[0015] The electric spindle assembly cooling device has the following beneficial effects:

[0016] (1) The electric spindle assembly cooling device can increase the contact area of the outer cylinder and the sleeve, improve the efficiency of heat transfer from the outer cylinder to the sleeve, and take away the heat of the sleeve through the channel for circulating the cooling medium.

[0017] (2) The electric spindle assembly cooling device can be fixed by the threaded connection between the threaded cylinder and the outer cylinder, which is convenient and fast to disassemble and install, and is convenient for workers to maintain the electric spindle subsequently. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 is the overall structure schematic diagram of the electric spindle assembly cooling device.

[0020] Figure 2It is the split structure schematic view of the cooling device of the electric spindle assembly.

[0021] Figure 3 It is the right end structure schematic view of the sleeve.

[0022] Figure 4 It is the left end structure schematic view of the sleeve.

[0023] Figure 5 It is the connection mode schematic view of the threaded cylinder and the cylinder.

[0024] In the figure,

[0025] 1, outer cylinder; 2, annular protrusion; 3, strip-shaped protrusion; 4, external thread; 5, sleeve; 6, rubber gasket; 7, annular pressing plate; 8, threaded cylinder; 9, cylinder; 10, groove; 11, axial through hole; 12, connecting groove; 13, medium inlet; 14, medium outlet; 15, threaded hole; 16, threaded column. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model will be further illustrated below by means of specific embodiments and the accompanying drawings.

[0027] Wherein, the accompanying drawings are only for example explanation, and the representation is only schematic diagram, not real object drawing, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the accompanying drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for the person skilled in the art, it is understandable that some known structures and their description in the accompanying drawings can be omitted.

[0028] The same or similar signs in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the positional relationship description in the drawings is only for example explanation, and cannot be understood as the limitation of the patent, for the person skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0029] In the description of the utility model, unless another definite provision and limitation, if the connection of the connecting relationship between the components appears the term, this term should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two components inside or the interaction relationship of two components.For the ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0030] As Figures 1 to 5 The utility model provides a kind of cooling device of electric spindle assembly, mainly including outer tube 1, sleeve 5, annular pressing plate 7, threaded cylinder 8 and the like component, wherein the outside of outer tube 1 is provided with annular protrusion 2 and multiple axial strip protrusions 3, annular protrusion 2 is located at the front end of outer tube 1, for limiting the position of sleeve 5;And strip protrusion 3 is annular array distribution on the outside of outer tube 1, for increasing the contact area between outer tube 1 and sleeve 5, to improve the cooling effect of outer tube 1.

[0031] Sleeve 5 is the core component of the cooling device, and multiple axial through holes 11 are provided in the inside thereof, these axial through holes 11 are connected into a continuous medium passage by front and rear connecting grooves 12, the outside of sleeve 5 is provided with medium inlet 13 and medium outlet 14, which are connected with the two ends of medium passage respectively, cooling medium enters sleeve 5 through medium inlet 13, flows through axial through hole 11 and connecting groove 12, and finally flows out from medium outlet 14, so as to realize the cooling of electric spindle;

[0032] Preferably, rubber gasket 6 is arranged between the two ends of sleeve 5 and annular protrusion 2 and annular pressing plate 7, for sealing the gap between the two ends of sleeve 5 and annular protrusion 2 and annular pressing plate 7, to prevent cooling medium from leaking.

[0033] Specifically, the rear end of outer tube 1 is provided with external thread 4, and threaded cylinder 8 is connected by thread, and sleeve 5 can be fixed after threaded cylinder 8 is tightened, to limit the forward and backward movement of sleeve 5.

[0034] Preferably, threaded hole 15 is arranged on the outside of threaded cylinder 8, for connecting cylinder 9, threaded column 16 is fixedly connected to the front end of cylinder 9, threaded column 16 can cooperate with threaded hole 15 on the outside of threaded cylinder 8, and after cylinder 9 is connected with threaded cylinder 8, user can rotate threaded cylinder 8, so as to facilitate the disassembly or installation of threaded cylinder 8.

[0035] The circulation system of the cooling medium: the medium inlet 13 and the medium outlet 14 are connected with an external cooling medium circulation system through pipes, the cooling medium enters the sleeve 5 from the medium inlet 13, flows through the axial through hole 11 and the connecting groove 12, and then flows out from the medium outlet 14 after absorbing the heat generated by the motorized spindle, and then is cooled in the external cooling medium circulation system and then is circulated back to the medium inlet 13, so that a closed cooling circulation is formed.

[0036] The length of the strip-shaped protrusion 3: the length of the strip-shaped protrusion 3 is greater than the length of the sleeve 5, but less than the overall length of the sleeve 5 and the annular pressing plate 7, and when the threaded cylinder 8 is tightened, the strip-shaped protrusion 3 is pressed on the annular pressing plate 7 and does not contact the strip-shaped protrusion 3, so that the sleeve 5 is prevented from moving forward and backward after the threaded cylinder 8 is tightened.

[0037] The cooperation between the outer cylinder 1 and the sleeve 5: the inner wall of the sleeve 5 is in contact with the outer wall of the outer cylinder 1, and the inner wall of the groove 10 on the inner side of the sleeve 5 is in contact with the outer wall of the strip-shaped protrusion 3, and the strip-shaped protrusion 3 can increase the contact area between the outer cylinder 1 and the sleeve 5, so that the cooling effect of the outer cylinder 1 is improved.

[0038] The material selection of the sleeve 5: the sleeve 5 is preferably made of copper, and copper has good thermal conductivity and corrosion resistance, so that the heat generated by the motorized spindle can be effectively conducted, and the service life of the sleeve 5 is prolonged.

[0039] The installation process of the utility model:

[0040] When the motorized spindle assembly cooling device is used, first, the sleeve 5 is sleeved on the outer cylinder 1, and the strip-shaped protrusion 3 is ensured to pass through the groove 10 on the inner side of the sleeve 5, then the annular pressing plate 7 is sleeved on the outer cylinder 1, and finally the sleeve 5 and the annular pressing plate 7 are fixed through the threaded cylinder 8, so that the installation of the whole device is completed.

[0041] It should be noted that the above specific embodiments are only preferred embodiments of the utility model and the technical principles applied. Those skilled in the art should understand that various modifications, equivalent replacements, changes and the like can be made to the utility model. However, as long as these changes do not deviate from the spirit of the utility model, they should be within the protection scope of the utility model. In addition, some terms used in the specification and claims of the present application are not limited, but are only for the convenience of description.

Claims

1. An electric spindle assembly cooling device, characterized by, The outer cylinder (1) of the electric spindle is provided with an annular protrusion (2) at the front end and a plurality of axial strip-shaped protrusions (3) arranged in a ring array on the outer side of the outer cylinder (1). The outer cylinder (1) and the strip-shaped protrusions (3) are covered by a sleeve (5) and an annular pressing plate (7), the inner side of the sleeve (5) and the annular pressing plate (7) are provided with grooves (10) for the strip-shaped protrusions (3) to pass through, the sleeve (5) is located between the annular protrusion (2) and the annular pressing plate (7), the rear end of the outer cylinder (1) is provided with external threads (4), and a threaded cylinder (8) is connected through the threads, the outer part of the threaded cylinder (8) is provided with a detachable cylinder (9). The side wall of the sleeve (5) is provided with a plurality of axial through holes (11), the front and rear ends of the sleeve (5) are provided with connecting grooves (12), all the axial through holes (11) are connected into a whole medium channel through the connecting grooves (12) in sequence, the outer part of the sleeve (5) is provided with a medium inlet (13) and a medium outlet (14), and the medium inlet (13) and the medium outlet (14) are connected with both ends of the medium channel respectively.

2. The electric spindle assembly cooling device of claim 1, wherein, Rubber gaskets (6) are arranged between the two ends of the sleeve (5) and the annular protrusion (2) and the annular pressing plate (7).

3. The electric spindle assembly cooling device of claim 1, wherein, The outer side of the threaded cylinder (8) is provided with a threaded hole (15) for connecting the cylinder (9).

4. The electric spindle assembly cooling device of claim 3, wherein, The front end of the cylinder (9) is fixedly connected with a threaded column (16), and the threaded column (16) can cooperate with the threaded hole (15) on the outer side of the threaded cylinder (8).

5. The electric spindle assembly cooling device of claim 1, wherein, The medium inlet (13) and the medium outlet (14) are connected with an external cooling medium circulation system through pipelines.

6. The electric spindle assembly cooling device of claim 1, wherein, The length of the strip-shaped protrusion (3) is greater than the length of the sleeve (5), and the length of the strip-shaped protrusion (3) is less than the overall length of the sleeve (5) and the annular pressing plate (7).

7. The electric spindle assembly cooling device of claim 1, wherein, The inner wall of the sleeve (5) is in contact with the outer wall of the outer cylinder (1), and the inner wall of the groove (10) on the inner side of the sleeve (5) is in contact with the outer wall of the strip-shaped protrusion (3).

8. The electric spindle assembly cooling device of claim 1, wherein, The sleeve (5) is made of copper.

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