Power seat water cooling structure

Abstract

The utility model discloses a power tool holder water cooling structure sets up in a tool holder body, is equipped with drive shaft cavity and driven shaft cavity in tool holder body, is installed with drive shaft sleeve in drive shaft cavity. The water cooling structure includes cooling liquid input hole, and is set up on tool holder body, first sealed flow channel is surrounded and is formed by first recess on drive shaft cavity inner wall and drive shaft sleeve outer wall, a plurality of external cooling flow channels are surrounded in drive shaft cavity periphery, and are recessed in tool holder body circumference wall and communicate in proper order, second sealed flow channel is surrounded and is formed by second recess on drive shaft cavity inner wall and drive shaft sleeve outer wall, and is isolated with first sealed flow channel, cooling liquid output hole is set up on tool holder body corresponding one end of driven shaft cavity. Cooling liquid input hole, first sealed flow channel, a plurality of external cooling flow channels, second sealed flow channel and cooling liquid output hole communicate in proper order, constitute the continuous cooling channel. This structure can realize the three -dimensional surrounding type cooling of drive shaft, improves the heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power tool holder technology, and in particular to a water-cooled structure for a power tool holder. Background Technology

[0002] The powered tool holder rotates at high speed under the drive of the machine tool, and the friction between the tool and the workpiece generates a large amount of heat. This heat is conducted into the interior of the tool holder, which can easily lead to shortened tool life, thermal deformation of bearings and gears, and failure of lubricating grease, thereby affecting machining accuracy and tool holder reliability.

[0003] Among existing cooling methods, the most common is external spray cooling, which mainly acts on the cutting point between the tool and the workpiece. Its primary purposes are lubrication of the cutting zone, assisting chip removal, and reducing the tool tip temperature. However, it is almost ineffective in dissipating the heat generated by the internal drive unit of the tool holder, leaving the problem of internal heat accumulation unresolved. Although some technologies have attempted to incorporate cooling channels within the tool holder, most designs are rudimentary, with short flow paths, or only surround the tool tip, failing to address the core heat source—the drive shaft system—resulting in low heat dissipation efficiency. Therefore, there is an urgent need for an innovative water-cooling structure capable of simultaneously and efficiently cooling both the internal drive shaft and the external tool, fundamentally solving the overheating problem of the tool holder. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a water-cooled structure for a power tool holder, which realizes three-sided surround cooling of the power tool holder drive shaft, improves heat dissipation efficiency, and ensures the sealing and continuity of the cooling channel in the complex internal structure.

[0005] The technical solution of this utility model is: The present invention discloses a water-cooled structure for a power tool holder, which is disposed in a tool holder body. The tool holder body has a drive shaft cavity and a driven shaft cavity, and a drive shaft sleeve is installed in the drive shaft cavity. The water-cooling structure comprises: A coolant inlet is provided on the tool holder body; The first sealed flow channel is formed by the first groove on the inner wall of the drive shaft cavity and the outer wall of the drive shaft sleeve; Multiple external cooling channels surround the periphery of the drive shaft cavity, which are recessed in the outer peripheral wall of the tool holder body and connected in sequence; The second sealing channel is formed by the second groove on the inner wall of the drive shaft cavity and the outer wall of the drive shaft sleeve, and is isolated from the first sealing channel. A coolant outlet hole is provided on the tool holder body at one end corresponding to the driven shaft cavity; The coolant inlet, the first sealed flow channel, multiple external cooling flow channels, the second sealed flow channel, and the coolant outlet are connected in sequence to form a continuous cooling channel.

[0006] In the above structure, by integrating an efficient and reliable cooling circuit on the tool holder body, the cooling path actively passes through and externally wraps the core heat source of the drive shaft cavity, and ensures that the cooling path is completely isolated from the internal rotating parts, thus achieving efficient heat dissipation of the main heat-generating components of the power tool holder.

[0007] Furthermore, in the water-cooled power tool holder structure described in this utility model, there are three external cooling channels, which are respectively recessed into the right side wall, bottom wall, and left side wall of the tool holder body, thereby forming a three-sided surround cooling of the drive shaft cavity. This layout can uniformly and fully envelop the core heat source (drive shaft) for heat dissipation, fundamentally improving cooling efficiency.

[0008] Furthermore, in the water-cooled power tool holder structure described in this utility model, the inlet of the first sealed flow channel and the external cooling flow channel, any two adjacent external cooling flow channels, and the outlet of the external cooling flow channel and the second sealed flow channel are all connected by inclined channels. The inclined channels enable flow channel turning and connection in three-dimensional space, resulting in a compact structure, high machining feasibility, and ensuring smooth connectivity of the complex flow channel network.

[0009] Furthermore, in the water-cooled power tool holder structure described in this utility model, the external cooling channels located on the right and left walls are S-shaped. The S-shaped design significantly extends the flow path of the coolant on the side walls, increases the heat exchange time, and thus improves the heat dissipation effect in this area.

[0010] Furthermore, in the water-cooled power tool holder structure described in this utility model, a protrusion for extending the coolant flow path is provided in the external cooling channel located on the bottom wall. This protrusion extends from one side of the external cooling channel and maintains a gap with the inner wall on the opposite side. This protrusion forces the coolant to flow around it, which not only extends the flow path but, more importantly, disrupts laminar flow and generates turbulent flow, thereby enhancing the heat transfer intensity.

[0011] Furthermore, in the water-cooled power tool holder structure described in this utility model, a cover plate is sealed and covered on the end face of the tool holder body where the external cooling channel is recessed. The cover plate structure is simple and reliable, can convert the external groove into a sealed channel, and facilitates the processing and maintenance of the channel.

[0012] Furthermore, in the water-cooled power tool holder structure described in this utility model, the axis of the drive shaft cavity is perpendicular to the axis of the driven shaft cavity.

[0013] Furthermore, in the water-cooled power tool holder structure described in this utility model, the coolant inlet hole is located on the end face of the shaft extension of the drive shaft cavity. Positioning the inlet hole on the drive shaft end face facilitates connection with the machine tool cooling system and provides a neat layout, saving space.

[0014] Furthermore, in the power tool holder water-cooled structure described in this utility model, a transition channel is provided in the tool holder body, the root of the transition channel is connected to the second sealing flow channel, and its body is connected to the coolant output hole.

[0015] Furthermore, in the water-cooled power tool holder structure described in this utility model, the coolant outlet hole is located on the end face of the shaft extension of the driven shaft cavity. Positioning the outlet hole on the driven shaft end face allows the coolant to be precisely sprayed from the position closest to the tool, achieving efficient tool cooling and lubrication.

[0016] The beneficial effects of this utility model are: 1. This utility model, through the external cooling channels arranged around the drive shaft cavity, especially the three-sided surrounding design, can directly, uniformly and fully envelop the main heat sources such as the drive shaft, transforming from "cooling only the tool" to "simultaneously cooling the drive shaft and the tool", effectively reducing the overall working temperature of the tool holder; at the same time, combined with the S-shaped flow channel and the protrusion design in the bottom flow channel, it effectively extends the heat exchange time between the coolant and the tool holder body and enhances turbulence, improves heat dissipation efficiency, and ensures tool life, machining accuracy and long-term stable operation of the equipment.

[0017] 2. This utility model has a compact structure, with the cooling channel fully integrated into the tool holder body, avoiding interference problems that may occur with external pipes in a confined space; by forming a sealed flow channel by enclosing the drive bushing and the cavity groove, a closed flow channel that does not interfere with moving parts is constructed in the complex rotating shaft cavity; at the same time, the external flow channel is sealed by a cover plate and combined with inclined channels to achieve reliable connection in three-dimensional space, together forming a fully enclosed, leak-free integrated cooling system, which improves the compactness and reliability of the structure while ensuring functionality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of this utility model after removing the cover plate and drive shaft sleeve. Figure 1 .

[0020] Figure 3 This is a schematic diagram of the structure of this utility model after removing the cover plate and drive shaft sleeve. Figure 2 .

[0021] Figure 4 This is a schematic diagram of the structure of this utility model after removing the cover plate and drive shaft sleeve. Figure 3 .

[0022] Figure 5 for Figure 1A schematic diagram of a cross-section. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings: Reference Figure 1 As shown in the figure, the water-cooled power tool holder structure described in this embodiment is disposed in a tool holder body 1. The tool holder body 1 has mutually perpendicular drive shaft cavity 2 and driven shaft cavity 3 machined inside, forming a right-angle tool holder. For ease of description, the end face where the shaft extension end of the drive shaft cavity 2 is located is defined as the upper end face, and the end face where the shaft extension end of the driven shaft cavity 3 is located is defined as the front end face. A drive shaft sleeve 4 is coaxially installed in the drive shaft cavity 2.

[0024] Combination Figures 2-5 The water-cooling structure is a continuous cooling channel fully integrated into the tool holder body 1, which is composed of the following components connected in series in spatial order.

[0025] 1. Coolant inlet hole 5 is opened on the tool holder body 1, specifically located on the shaft extension end face of the drive shaft cavity 2, i.e., the upper end face; 2. The first sealing channel 6 is formed by the first groove on the inner wall of the drive shaft cavity 2 and the outer wall of the drive shaft sleeve 4, which are tightly surrounded to ensure a seal; 3. Three external cooling channels are recessed on the outer peripheral wall of the tool holder body 1 and connected in sequence, thereby forming a three-sided surrounding cooling for the drive shaft cavity 2; specifically including: First external cooling channel 71: S-shaped, recessed on the right side wall of tool holder body 1; Second external cooling channel 72: recessed in the bottom wall of the tool holder body 1, and a protrusion 721 for extending the coolant flow path is provided in its cavity. The protrusion 721 extends from the inner wall of one side of the channel to the opposite side and maintains a gap with the inner wall of the opposite side. The third external cooling channel 73 is S-shaped and recessed into the left side wall of the tool holder body; 4. The second sealing channel 8 is formed by the second groove on the inner wall of the drive shaft cavity 2 and the outer wall of the drive shaft sleeve 4, and is isolated from the first sealing channel 6. 5. Transition channel 9, which is opened in the tool holder body 1, is formed by drilling from the end face of the shaft extension of the drive shaft cavity 2, and its root is connected to the second sealing flow channel 8. 6. A coolant outlet hole 10 is provided on the tool holder body 1, specifically located on the end face of the shaft extension of the driven shaft cavity 3, i.e., the front end face, and communicates with the body of the transition channel 9. A spherical nozzle is connected to the coolant outlet hole 10 for spraying coolant onto the tool and the workpiece.

[0026] To achieve connectivity between the aforementioned flow channels in three-dimensional space, key connection points are achieved through inclined channels: the inlet of the first sealing flow channel 6 and the first external cooling flow channel 71 is connected through the first inclined channel 11. The first external cooling flow channel 71 and the second external cooling flow channel 72 are connected through the second inclined channel 12. The second external cooling flow channel 72 and the third external cooling flow channel 73 are connected through the third inclined channel 13. The third external cooling flow channel 73 and the second sealing flow channel 8 are connected through the fourth inclined channel 14.

[0027] To seal the external flow channels, a cover plate is sealed with screws on all end faces of the tool holder body 1 where the external cooling flow channels 7 are recessed. A sealing ring can be provided between the cover plate and the tool holder body 1.

[0028] During operation, the pump of the external cooling system introduces coolant into the coolant inlet 5. Driven by pressure, the coolant flows along the following path, forming a complete cooling path: The coolant enters the first sealed flow channel 6 on the inner wall of the drive shaft cavity 2 from the coolant inlet 5, is guided through the first inclined channel 11 to the outer wall of the tool holder body 1, and enters the first external cooling flow channel 71. The S-shaped design effectively extends the flow path and heat exchange time of the coolant on the right side wall. Next, the coolant enters the second external cooling flow channel 72 at the bottom through the second inclined channel 12. The protrusions within the flow channel force the coolant to circulate, generating turbulence and further extending the flow path, greatly enhancing the heat dissipation effect in the tool holder body. Then, the coolant enters the third external cooling flow channel 73 through the third inclined channel 13, completing heat dissipation on the left side wall. Afterward, the coolant is reintroduced into the drive shaft cavity 2 through the fourth inclined channel 14, entering the second sealed flow channel 8. The coolant collected in the second sealed flow channel 8 enters the transition channel 9 and flows along its body to the coolant outlet 10. Finally, the coolant is ejected at high speed from the coolant outlet 10, directly acting on the tool and workpiece in the cutting area to complete the final cooling and lubrication tasks. During this process, as the coolant flows through the entire channel, it continuously and efficiently removes the cutting heat from inside the tool holder and the tool tip, thereby ensuring that the tool holder operates stably under constant temperature conditions, significantly improving machining accuracy, tool life, and equipment reliability.

[0029] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model are still covered by the claims of this utility model.

Claims

1. A water-cooled power tool holder structure, disposed in a tool holder body, wherein the tool holder body has a drive shaft cavity and a driven shaft cavity, and a drive shaft sleeve is installed in the drive shaft cavity, characterized in that, The water-cooling structure includes: A coolant inlet is provided on the tool holder body; The first sealed flow channel is formed by the first groove on the inner wall of the drive shaft cavity and the outer wall of the drive shaft sleeve; Multiple external cooling channels surround the periphery of the drive shaft cavity, which are recessed in the outer peripheral wall of the tool holder body and connected in sequence; The second sealing channel is formed by the second groove on the inner wall of the drive shaft cavity and the outer wall of the drive shaft sleeve, and is isolated from the first sealing channel. A coolant outlet hole is provided on the tool holder body at one end corresponding to the driven shaft cavity; The coolant inlet, the first sealed flow channel, multiple external cooling flow channels, the second sealed flow channel, and the coolant outlet are connected in sequence to form a continuous cooling channel.

2. The water-cooled power tool holder structure according to claim 1, characterized in that: The number of external cooling channels is three, which are respectively recessed into the right side wall, bottom wall and left side wall of the tool holder body, thereby forming a three-sided surrounding cooling of the drive shaft cavity.

3. The water-cooled power tool holder structure according to claim 2, characterized in that: The first sealed flow channel is connected to the inlet of the external cooling flow channel, between any two adjacent external cooling flow channels, and between the outlet of the external cooling flow channel and the second sealed flow channel through inclined channels.

4. The water-cooled power tool holder structure according to claim 2, characterized in that: The external cooling channels located on the right and left walls are S-shaped.

5. The water-cooled power tool holder structure according to claim 2, characterized in that: The external cooling channel located on the bottom wall has a protrusion for extending the coolant flow path. The protrusion extends from one side of the external cooling channel and maintains a gap with the inner wall on the opposite side.

6. The water-cooled power tool holder structure according to claim 1 or 2, characterized in that: A cover plate is sealed on the end face of the tool holder body, which has the external cooling channel recessed therein.

7. The water-cooled power tool holder structure according to claim 1 or 2, characterized in that: The axis of the drive shaft cavity is perpendicular to the axis of the driven shaft cavity.

8. The water-cooled power tool holder structure according to claim 1 or 2, characterized in that: The coolant inlet is located on the end face of the shaft extension of the drive shaft cavity.

9. The power tool holder water-cooled structure according to claim 1 or 2, characterized in that: The tool holder body is provided with a transition channel, the root of which is connected to the second sealing flow channel, and the body of which is connected to the coolant output hole.

10. The power tool holder water-cooled structure according to claim 9, characterized in that: The coolant outlet hole is located on the end face of the shaft extension of the driven shaft cavity.

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