Hot shrinkable handle with center water outlet

Abstract

The utility model relates to mechanical engineering and manufacturing technical field especially, and relates to a heat shrinkage knife handle of central water outlet, include: the knife handle body is to the structure of big middle diameter, small both ends diameter, the axle of knife handle body has through -hole, and one end of knife handle body is the water outlet, and the other end is the water inlet, the inside of through -hole includes locking section and water outlet section, and the locking section diameter is bigger than the water outlet section diameter, the inside of knife handle body has cooling channel, and cooling channel extends from the water inlet to the water outlet, and is linked with the through -hole, and the maximum place of knife handle outside diameter still has locking assembly, the utility model discloses through setting cooling channel in the inside of knife handle body and being linked with the through -hole, and the setting of locking section diameter big, water outlet section diameter small in the inside of through -hole, makes cooling liquid after passing through can form stronger local impact force, and more thoroughly removes the chip and fine residual on the processing surface, to solve the influence of temperature rise and chip residue in the cutting process to quality and efficiency in a more systematic way.

Description

Technical Field

[0001] This utility model relates to the fields of mechanical engineering and manufacturing technology, and in particular to a heat shrink tool holder with a central water outlet. Background Technology

[0002] Heat shrink tool holders are widely used in high-precision machining. Their working principle involves heating the tool holder material to expand it, then inserting the tool into the expanded cavity. After the tool holder cools and shrinks back, it tightly clamps the tool. This method provides extremely high concentricity and stability, ensuring the tool's stability and precise positioning during machining, thereby reducing vibration and improving machining accuracy.

[0003] In existing technologies, during the cutting process, the cutting tool continuously supplies coolant to reduce the cutting temperature and also provides some cleaning. However, existing technologies often fail to achieve thorough and effective cleaning of the material surface during machining. In most cases, the coolant can only reduce some of the residual chips but cannot completely remove the fine machining residues on the machined surface. This necessitates additional secondary cleaning of many workpieces after machining to ensure product cleanliness and quality.

[0004] Therefore, there is an urgent need for a new type of tool holder structure that can perform efficient cleaning simultaneously during machining and cooling. Utility Model Content

[0005] In view of at least one of the above technical problems, the present invention provides a heat-shrinkable knife handle with a central water outlet, which adopts an improved water outlet structure to achieve efficient cleaning.

[0006] According to a first aspect of the present invention, a heat-shrink knife holder with a central water outlet is provided, comprising: The handle body has a structure with a large diameter in the middle and a small diameter at both ends. The shaft of the handle body has a through hole. One end of the handle body is the water outlet and the other end is the water inlet. The through hole includes a locking section and a water outlet section, and the diameter of the locking section is larger than the diameter of the water outlet section. The handle body has a cooling channel inside, which extends from the water inlet to the water outlet and communicates with the through hole. The handle also has a locking component at its largest outer diameter.

[0007] In some embodiments of this utility model, the locking assembly is arranged around the largest diameter of the tool holder body, including two locking rings of the same diameter and a locking groove disposed between the two locking rings.

[0008] In some embodiments of this utility model, the locking groove also has a locking hole.

[0009] In some embodiments of this utility model, the locking assembly also has a guide port, which is opened on the snap ring and locking groove near the water inlet.

[0010] In some embodiments of this utility model, a tool relief groove is also provided on the outer periphery of the tool holder body, and the tool relief groove is located on the side of the retaining ring near the water inlet.

[0011] In some embodiments of this invention, the cooling channels are three in number and evenly distributed.

[0012] In some embodiments of this utility model, the cooling channel at the water inlet extends to the outside of the handle body.

[0013] In some embodiments of this utility model, the cooling channel at the water outlet extends into the interior of the handle body.

[0014] In some embodiments of this utility model, the locking segment also has a threaded connection segment inside.

[0015] In some embodiments of this utility model, the locking section near the water inlet also has a clearance section, the diameter of which is larger than the diameter of the locking section.

[0016] The beneficial effects of this utility model are as follows: By setting a cooling channel inside the tool holder body and communicating with the through hole, the cooling medium can flow directly from the inlet to the outlet during the cutting process and cover the cutting area. This not only effectively reduces the high temperature generated by cutting and protects the tool life, but also cleans the machined surface with the help of continuous liquid flow. By setting the locking section inside the through hole to have a large diameter and the outlet section to have a small diameter, the coolant can form a stronger local impact force after passing through, and more thoroughly remove chips and fine residues from the machined surface. A locking component is also set at the largest diameter of the tool holder, which further improves the overall clamping stability and prevents tool slippage or vibration during high-load machining. Compared with traditional tool holders that only have a single cooling function, this patent solves the problem of temperature rise and chip residue affecting quality and efficiency during cutting in a more systematic way by integrating the cooling channel with the cleaning function. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the heat-shrinkable knife handle with water outlet in the center in an embodiment of this utility model; Figure 2 This is a top view of the heat-shrink knife handle with a central water outlet in an embodiment of this utility model; Figure 3 As an embodiment of this utility model Figure 2 Sectional view along the middle AA direction; Figure 4 This is a schematic diagram of the structure of the heat-shrinkable knife handle from one perspective in an embodiment of this utility model; Figure 5 This is a structural schematic diagram of the heat-shrinkable knife handle from another perspective in an embodiment of this utility model.

[0019] Reference numerals: 1. Tool holder body; 2. Through hole; 21. Locking section; 21a. Threaded connection section; 21b. Clearance section; 22. Water outlet section; 3. Water outlet; 4. Water inlet; 5. Cooling channel; 6. Locking assembly; 61. Snap ring; 62. Locking groove; 63. Locking hole; 64. Guide port; 7. Tool retraction groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] like Figures 1 to 5 The heat shrink tool holder with a central water outlet shown includes: The handle body 1 has a structure with a large diameter in the middle and a small diameter at both ends. The shaft of the handle body 1 has a through hole 2. One end of the handle body 1 is the water outlet 3, and the other end is the water inlet 4. The through hole 2 includes a locking section 21 and a water outlet section 22. The diameter of the locking section 21 is larger than that of the water outlet section 22. The variable diameter setting can compress the water entering the heat shrink tool holder to form a faster flow rate. When the water flows through the water outlet 3, the water flow rate is faster, which can better clean the waste material cut off.

[0024] The tool holder body 1 has a cooling channel 5 inside. The cooling channel 5 extends from the water inlet 4 to the water outlet 3 and is connected to the through hole 2. It should be noted that the cooling channel 5 can be in many forms, such as inclined, spiral, or set according to the actual tool.

[0025] The outermost part of the handle also has a locking component 6. It should be noted that the locking component 6 can take many forms, such as snap-locking, screw-locking, or other locking methods.

[0026] In the operation of a center-outlet heat-shrink tool holder, the tool is first inserted into the through hole 2 in the center of the tool holder body 1. The tool is guided by the clearance section 21b, ensuring accurate insertion into the heat-shrink tool holder. Then, it is guided by the guide port 64 on the locking assembly 6, making the connection between the tool and the heat-shrink tool holder more precise. Under the action of the heating device, the tool holder material begins to expand. The threaded connection section 21a within the locking section 21 ensures the tool is firmly fixed within the tool holder, preventing positional displacement. After tool installation, the cooling system is activated, and coolant flows into the tool holder through the inlet 4. Due to the evenly distributed design of the cooling channels 5, the coolant flows in multiple directions within the tool holder, ensuring comprehensive tool cooling, reducing cutting temperature, and simultaneously flushing away machining residue, keeping the machined surface clean. When tool removal or replacement is required, the heated retraction mechanism of the heat-shrink tool holder allows for easy tool release. The tool retraction groove 7 located on the side of the retaining ring 61 near the inlet 4 further facilitates smooth tool removal. Throughout the process, the coolant at the three outlets is designed with slots to ensure that it is quickly and completely discharged from inside the tool holder, further improving the efficiency of the cooling system.

[0027] This invention utilizes a cooling channel 5 located inside the tool holder body 1 and connected to the through hole 2. This allows the cooling medium to flow directly from the inlet 4 to the outlet 3 during cutting, covering the cutting area. This not only effectively reduces the high temperature generated during cutting and protects the tool life, but also cleans the machined surface with a continuous flow of liquid. The large diameter of the locking section 21 inside the through hole 2 and the small diameter of the outlet section 22 allow the coolant to generate a stronger local impact force after passing through, more thoroughly removing chips and fine residues from the machined surface. A locking component 6 is also provided at the largest diameter of the tool holder, further improving the overall clamping stability and preventing tool slippage or vibration during high-load machining. Compared to traditional tool holders that only have a single cooling function, this patent integrates the cooling channel 5 with the cleaning function, solving the impact of temperature rise and chip residue on quality and efficiency during cutting in a more systematic way.

[0028] Although heat-shrink tool holders rely on the principle of thermal expansion and contraction of materials to clamp the tool, in certain high-load, high-speed precision machining operations, vibration or impact forces can still cause the tool to shift position or even loosen. For example... Figure 4 As shown, the locking assembly 6 is located at the maximum diameter of the tool holder body 1, and includes two identical retaining rings 61 and a locking groove 62 between the two retaining rings 61. This invention, by setting the locking assembly 6 at the maximum diameter of the tool holder body 1, utilizes the two identical retaining rings 61 and the locking groove 62 between them to form an additional locking structure. This not only complements the thermal expansion and contraction clamping principle of the heat-shrink tool holder, but also enhances the tool's fixing effect through double mechanical protection. The locking groove 62 is responsible for accommodating and fixing the retaining rings 61, ensuring a stable engagement. The consistency between the retaining rings 61 ensures uniform force distribution, thereby avoiding the offset problem caused by uneven distribution of locking force.

[0029] In some precision machining scenarios, even the slightest tool deviation can lead to machining errors and affect product quality. Therefore, the locking groove 62 also has a locking hole 63. For example... Figure 4 , Figure 5 As shown, the locking hole 63 provided on the locking groove 62 adds an interface for fixing an additional locking device. Through linkage with the external locking device, the locking hole 63 further enhances the locking capability of the tool holder. The locking hole 63 allows users to flexibly select and install additional locking mechanisms, and adjust the fixing strength and method of the tool according to specific processing needs and conditions. This not only enhances the reliability of the locking structure, but also provides greater flexibility and adjustability.

[0030] Traditional heat shrink tool holders rely on experience or the operator's visual judgment to determine orientation and positioning during installation. Due to the lack of a clear guiding structure, this can lead to installation misalignment or displacement, affecting the tool holder's clamping performance and usability. For example... Figure 2 , Figure 4 and Figure 5 As shown, the locking assembly 6 also has a guide port 64, which is located on the snap ring 61 and locking groove 62 near the water inlet 4. The guide port 64 serves as a directional positioning structure during installation, positioned on the snap ring 61 and locking groove 62 near the water inlet 4 to ensure clear differentiation between the water inlet and outlet during installation. This design provides clear directional markings during installation, enabling operators to quickly and accurately install the heat shrink tool holder, avoiding functional problems or machining hazards caused by misjudging the direction. Through precise positioning, the guide port 64 ensures the uniqueness of the installation direction, thereby further improving the overall performance of the tool holder's cooling and locking functions during use.

[0031] Heat shrink tool holders often require significant force and precision to clamp and release tools during installation and removal. For example... Figure 1 As shown, a tool holder body 1 also has a tool retraction groove 7 on its outer periphery, which is located on the side of the retaining ring 61 near the water inlet 4. The tool retraction groove 7, as a dedicated auxiliary structure, provides the operator with a safe and efficient space for smooth tool removal. After the tool is installed and enters precision machining, if tool replacement or adjustment is required, the tool retraction groove 7 provides the operator with a clear disassembly path and fulcrum, reducing reliance on tools or machinery. The placement of the tool retraction groove 7 near the water inlet 4 does not interfere with the flow path and locking function of the tool coolant, thus maintaining the overall functional stability of the tool holder.

[0032] In some embodiments of this utility model, such as Figure 2 , Figure 5 As shown, the cooling channels 5 are three and evenly distributed. By adding three evenly distributed cooling channels 5 inside the tool holder, this precise channel arrangement allows the coolant to form a uniform flow coverage inside the tool holder, ensuring that the tool benefits from cooling from multiple directions during operation. The uniform coolant distribution not only significantly improves the temperature control capability of the cutting area but also increases the cleaning efficiency of the coolant, helping to remove fine residues and chips generated during machining.

[0033] Traditional heat shrink tool holders typically have a relatively closed cooling system at the inlet 4. While this ensures normal coolant flow, it makes it difficult to quickly determine if there are blockages or residue buildup in the cooling channels 5 during routine maintenance and cleaning. This can lead to reduced cooling efficiency and ultimately affect machining performance. (Reference) Figure 5As shown, the cooling channels 5 at the water inlet 4 extend to the outside of the tool holder body 1. By opening cooling channels 5 at the water inlet 4 and extending them to the outside of the tool holder body 1, operators can more easily observe and access the inlets of the cooling channels 5, making the inspection and maintenance of the cooling system more intuitive and quick. This simplifies the cleaning process of the cooling channels 5 and can solve the problem of blockage caused by chips or impurities, thereby ensuring that the cooling system maintains its optimal operating condition for a long time.

[0034] To increase the water flow rate in the cooling channel 5, the cooling channel 5 is extended beyond the tool holder body 1 by slotting at the aforementioned water inlet 4, as shown below. Figure 4 As shown, a cooling channel 5 with a water outlet 3 is also provided, extending into the interior of the tool holder body 1. By slotting the water outlet 3 and extending it into the interior of the tool holder body 1, the discharge dynamics of the coolant are enhanced, the discharge path of the coolant is further enriched, and the coolant is allowed to flow freely in a wider channel area, reducing the fluid flow resistance. This significantly improves the discharge speed and efficiency, effectively preventing coolant from stagnating inside the tool holder and ensuring that residual liquid and chips in the machining area are quickly removed.

[0035] Traditional heat-shrink tool holder structures typically rely on the principle of thermal expansion and contraction of materials to clamp the tool. However, under high load or high torque machining, this clamping method alone may be insufficient to meet the higher requirements for stability and strength in certain special application scenarios. In some embodiments of this utility model, such as... Figure 3 As shown, the locking section 21 also has a threaded connection section 21a inside. The mechanical threaded interface provides a more reliable fixation of the tool. The threaded connection section 21a not only provides additional fixing force through an adjustable threaded locking method, but also gives the tool loading and unloading greater convenience, allowing operators to flexibly adjust the tool clamping state according to actual needs. While maintaining the tight clamping characteristics of the heat-shrink tool holder, it increases the reliability of the mechanical connection, thus better meeting the requirements for tool stability under high-speed rotation or continuous vibration.

[0036] While heat-shrink tool holders are compact in design and assembly, space constraints can lead to operational difficulties or affect tool stability. (Continue to refer to...) Figure 3As shown, the locking section 21 near the inlet 4 also has a clearance section 21b, the diameter of which is larger than that of the locking section 21. The clearance section 21b, with a larger diameter than the locking section 21 near the inlet 4, acts as a spatial buffer during assembly. The presence of the clearance section 21b provides more operating space, allowing for smoother insertion and fixing of the tool, reducing assembly errors and construction difficulty. The larger diameter provides additional flow space, allowing the coolant to flow more flexibly, avoiding flow obstruction caused by narrow space, and improving coolant delivery efficiency and cooling performance.

[0037] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat-shrinkable tool holder with a central water outlet, characterized in that, include: The handle body has a structure with a large diameter in the middle and a small diameter at both ends. The shaft of the handle body has a through hole. One end of the handle body is the water outlet and the other end is the water inlet. The through hole includes a locking section and a water outlet section, and the diameter of the locking section is larger than the diameter of the water outlet section. The handle body has a cooling channel inside, which extends from the water inlet to the water outlet and communicates with the through hole. The handle also has a locking component at its largest outer diameter.

2. The heat-shrinkable knife holder with a central water outlet according to claim 1, characterized in that, The locking assembly is located at the maximum diameter of the tool holder body and includes two locking rings of the same diameter and a locking groove between the two locking rings.

3. The heat-shrinkable knife holder with a central water outlet according to claim 2, characterized in that, The locking groove also has a locking hole.

4. The heat-shrinkable knife holder with a central water outlet according to claim 2, characterized in that, The locking assembly also has a guide port, which is located on the snap ring and locking groove near the water inlet.

5. The heat-shrinkable knife holder with a central water outlet according to claim 2, characterized in that, The outer periphery of the handle body is also provided with a tool relief groove, which is located on the side of the retaining ring near the water inlet.

6. The heat-shrinkable knife holder with a central water outlet according to claim 1, characterized in that, The cooling channels are three in number and evenly distributed.

7. The heat-shrinkable knife holder with a central water outlet according to claim 6, characterized in that, The cooling channel at the water inlet extends outward to the outside of the handle body.

8. The heat-shrinkable knife holder with a central water outlet according to claim 6, characterized in that, The cooling channel at the water outlet extends into the interior of the handle body.

9. The heat-shrinkable knife holder with a central water outlet according to claim 1, characterized in that, The locking section also has a threaded connection section inside.

10. The heat-shrinkable knife holder with a central water outlet according to claim 1, characterized in that, The locking section near the water inlet also has a clearance section, the diameter of which is larger than that of the locking section.

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