Spring chuck type damping and shock absorption cutter bar
By designing a spring chuck-type damping shock-absorbing tool rod with extended tool rod and installing a damper accommodation chamber in its outer half, the existing tool handle is solved by insufficient length and large space occupied by the damper, achieving deeper processing and efficient tool change.
Patent Information
- Application Number
- CN202422288638.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing toolbar length of the seismic lengthening tool handle is limited, which cannot meet the deeper processing needs. The damper components occupy a large space and are costly, so the seismic effect needs to be improved.
A spring chuck type damping and shock-absorbing tool rod is designed, using an extended tool rod and a damper accommodation cavity is provided in its outer half. The damper assembly is divided into multiple axial through structures, combining the converter joint, the spring chuck and the compression nut to achieve quick tool replacement.
It achieves deeper processing capabilities, while maintaining good shock absorption effects, high cost performance and high tool change efficiency.
Smart Images
Figure CN223056743U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of CNC cutting tools, and particularly relates to a spring chuck type damping shock-absorbing tool bar. Background Art
[0002] During NC machining, deep holes and deep cavities are often encountered. When machining, an anti-vibration extended tool holder is used, and a damper assembly is added inside the anti-vibration extended tool holder to reduce vibration and shock. However, in the existing anti-vibration extended tool holders, on the one hand, the length of the extended tool bar is relatively limited, only equivalent to the length of the spindle connection head, and it cannot meet the processing requirements for deeper depths; on the other hand, the damper assembly often basically occupies the entire space of the tool bar body, that is, the axial length occupied by the damper is more than 70% of the entire length of the tool holder. The anti-vibration effect still needs to be improved during actual use, and the cost is relatively high. Summary of the Invention
[0003] The problem to be solved by the utility model is: to provide a spring chuck type damping shock-absorbing tool bar to further improve the applicable range of the machining depth of the tool bar, and at the same time further improve the shock-absorbing effect and the cost performance of the tool bar.
[0004] The technical solution provided by the utility model to solve the above problems is:
[0005] A spring chuck type damping shock-absorbing tool bar, which includes an extended tool bar. One end of the extended tool bar is a spindle connection head for connecting to the spindle, and a connection port is axially opened inside the spindle connection head; the part outside the spindle connection head is the extended tool bar, and the length of the extended tool bar is 2-4 times the length of the spindle connection head; a damper accommodation cavity is axially arranged inside the outer half section of the extended tool bar and a damper assembly is installed inside it. A connection channel axially communicating the damper accommodation cavity and the connection port is arranged inside the inner half section of the extended tool bar, and the inner diameter of the damper accommodation cavity is larger than the inner diameter of the connection channel; a conversion joint is connected to the port of the outer half section of the extended tool bar, and a spring chuck and a chuck compression nut are connected to the outer end of the conversion joint; the conversion joint is connected to the inner thread at the port of the damper accommodation cavity through an external thread; both ends of the damper assembly are opposite and abutted against the end face of the connection channel and the inner end face of the conversion joint respectively; the inner wall of the outer section of the conversion joint is a conical surface section for connecting to the spring chuck, and the outer wall of the outer section of the conversion joint is connected to the inner thread of the chuck compression nut through an external thread. A through hole for the spring chuck to expose and for the tool clamped by it to pass through is arranged in the middle of the chuck compression nut.
[0006] The length of the damper assembly is 1 / 4 to 1 / 2 of the length of the extended tool bar, and the ratio of the outer diameter of the damper assembly to the length of the damper assembly is 1 / 4 to 1 / 3. The shock-absorbing effect obtained in this interval is better, and the cost of the damper is relatively low.
[0007] The damper assembly is divided into a first damper, a second damper, a third damper and a fourth damper, and all of them are axially through structures. Among them, the outer diameter of the first damper is slightly smaller than the inner diameter of the damper accommodation cavity. The second damper is axially disposed through the inside of the first damper, and both ends thereof respectively penetrate into the hollow interiors of the third damper and the fourth damper. The outer diameters of the third damper and the fourth damper are equivalent to the inner diameter of the damper accommodation cavity and are respectively located at both ends of the first damper. First sealing ring grooves are provided on the outer walls at both ends of the first damper, and first sealing rings in sealing contact with the damper accommodation cavity are installed. Second sealing ring grooves are respectively provided on the inner walls of the third damper and the fourth damper, and second sealing rings in sealing contact with the outer walls at both ends of the second damper are installed. Third sealing ring grooves are respectively provided on the outer walls of the third damper and the fourth damper, and third sealing rings in sealing contact with the inner wall of the damper accommodation cavity are respectively installed.
[0008] The main advantages of the present utility model are reflected in: First, the length of the extended tool bar is 2-4 times the length of the spindle connection head, and a damper assembly with a certain proportion of length and diameter is provided in the outer section of the tool bar close to the tool, so that the tool bar can still maintain good shock absorption and earthquake resistance effects after the extended length, so as to meet the processing requirements of deeper depths and have a high cost performance; Secondly, the tool chuck adopts a combination of a conversion joint, a spring chuck and a compression nut, so that the tool can be quickly replaced and the tool change efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 is the overall sectional structure schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0010] As Figure 1As shown in the figure, the present embodiment shows a spring chuck type damping shock-absorbing tool shank, which includes an extended tool shank 1. One end of the extended tool shank 1 is a spindle connection head 2 for connecting to the spindle. An axial connection port 21 is provided in the spindle connection head 2; the part outside the spindle connection head 2 is the extended tool shank 1, and the length of the extended tool shank 1 is 2-4 times the length of the spindle connection head 2; a damper accommodation cavity 100 is provided axially inside the outer half section of the extended tool shank 1 and a damper assembly 3 is installed inside. A connection channel 101 that axially communicates the damper accommodation cavity 100 and the connection port 21 is provided inside the inner half section of the extended tool shank 1, and the inner diameter of the damper accommodation cavity 100 is greater than the inner diameter of the connection channel 101; a conversion joint 4 is connected to the port of the outer half section of the extended tool shank 1. The outer end of the conversion joint 4 is connected to a spring chuck 5 and a chuck compression nut 6; the conversion joint 4 is connected to the inner thread at the port of the damper accommodation cavity 100 through an external thread; both ends of the damper assembly 3 are opposite and in contact with the end face of the connection channel 101 and the inner end face of the conversion joint 4 respectively, that is, the damper assembly 3 is locked and positioned by being in contact with the end face of the connection channel 101 through the inner end face of the conversion joint 4; the inner wall of the outer section of the conversion joint 4 is a tapered surface section 41 connected to the spring chuck 5, and the outer wall of the outer section of the conversion joint 4 is connected to the inner thread of the chuck compression nut 6 through an external thread. A through hole 61 for the spring chuck 5 to expose and for the tool clamped by it to pass through is provided in the middle of the chuck compression nut 6.
[0011] The length of the damper assembly 3 is 1 / 4 to 1 / 2 of the length of the extended tool shank 1, and the ratio of the outer diameter of the damper assembly 3 to the length of the damper assembly 3 is 1 / 4 to 1 / 3. A better shock-absorbing effect is obtained in this interval, and the cost of the damper is relatively low.
[0012] The damper assembly 3 is divided into a first damper 31, a second damper 32, a third damper 33 and a fourth damper 34, and all of them are axially through structures. Among them, the outer diameter of the first damper 31 is slightly smaller than the inner diameter of the damper accommodation cavity 100. The second damper 32 is axially disposed through the inside of the first damper 31, and both ends thereof respectively penetrate into the hollow interiors of the third damper 33 and the fourth damper 34. The outer diameters of the third damper 33 and the fourth damper 34 are equivalent to the inner diameter of the damper accommodation cavity 100 and are respectively located at both ends of the first damper 31. First sealing ring grooves are provided on the outer walls at both ends of the first damper 31, and first sealing rings 301 that are in sealing contact with the damper accommodation cavity 100 are installed. Second sealing ring grooves are respectively provided on the inner walls of the third damper 33 and the fourth damper 34, and second sealing rings 302 that are in sealing contact with the outer walls at both ends of the second damper 32 are installed. Third sealing ring grooves are respectively provided on the outer walls of the third damper 33 and the fourth damper 34, and third sealing rings 303 that are in sealing contact with the inner wall of the damper accommodation cavity 100 are respectively installed. The utility model adopts a split damper structure, which can disperse and offset vibrations, improve the earthquake resistance performance. The cooperation with the sealing rings can achieve a sealing and buffering effect, and further enhance the earthquake resistance performance.
[0013] The main advantages of the utility model are reflected in: First, the length of the extended tool bar is 2-4 times the length of the spindle connection head, and a damper assembly with a certain proportion of length and diameter is arranged in the outer section of the tool bar close to the tool, so that the tool bar can still maintain good shock absorption and earthquake resistance effects after the extended length, so as to meet the processing requirements of deeper depths and have a high cost performance; Second, the tool holder adopts a combination of a conversion joint, a spring collet and a compression nut, so that the tool can be replaced quickly, improving the tool change efficiency.
[0014] The above is only an illustration of the best embodiment of the utility model, but it should not be construed as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure allows changes. Any changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.
Claims
1. A spring collet type damping shock-absorbing tool shank, which comprises an extended tool shank. One end of the extended tool shank is a spindle connection head for connecting to the spindle, and a connection port is axially formed in the spindle connection head; the part other than the spindle connection head is the extended tool shank, and its characteristics are as follows: The length of the lengthened tool shank is 2-4 times the length of the spindle connection head; a damper accommodating cavity is arranged axially inside the outer half section of the lengthened tool shank and a damper assembly is installed inside. A connection channel is arranged axially inside the inner half section of the lengthened tool shank to communicate the damper accommodating cavity and the connection port, and the inner diameter of the damper accommodating cavity is larger than that of the connection channel; a conversion joint is connected to the port of the outer half section of the lengthened tool shank, and a collet chuck and a collet compression nut are connected to the outer end of the conversion joint; the conversion joint is connected to the inner thread at the port of the damper accommodating cavity through an external thread; both ends of the damper assembly are opposite to and in contact with the end face of the connection channel and the inner end face of the conversion joint respectively; the inner wall of the outer section of the conversion joint is a conical section connected to the collet chuck, and the outer wall of the outer section of the conversion joint is connected to the inner thread of the collet compression nut through an external thread. A through hole is arranged in the middle of the collet compression nut for the collet chuck to expose and for the tool clamped by it to pass through.
2. The spring collet type damping shock-absorbing tool shank according to claim 1, characterized in that: The length of the damper assembly is 1 / 4 to 1 / 2 of the length of the lengthened tool shank, and the ratio of the outer diameter of the damper assembly to the length of the damper assembly is 1 / 4 to 1 / 3.
3. The spring collet type damping shock-absorbing tool shank according to claim 1 or 2, characterized in that: The damper assembly is divided into a first damper, a second damper, a third damper and a fourth damper, and all are axially through structures. Among them, the outer diameter of the first damper is slightly smaller than the inner diameter of the damper accommodating cavity. The second damper is axially arranged inside the first damper and both ends penetrate into the hollow interiors of the third damper and the fourth damper respectively. The outer diameters of the third damper and the fourth damper are equivalent to the inner diameter of the damper accommodating cavity and are respectively located at both ends of the first damper; first sealing ring grooves are arranged on the outer walls of both ends of the first damper and first sealing rings in sealing contact with the damper accommodating cavity are installed; second sealing ring grooves are arranged on the inner walls of the third damper and the fourth damper respectively, and second sealing rings in sealing contact with the outer walls of both ends of the second damper are installed; third sealing ring grooves are arranged on the outer walls of the third damper and the fourth damper respectively, and third sealing rings in sealing contact with the inner wall of the damper accommodating cavity are installed.