Spring inner chamfering mechanism

Abstract

The utility model relates to the technical field of spring machining, in particular to a spring inner chamfering mechanism which comprises a transmission shaft and a chamfering tool assembly, the chamfering tool assembly can be adjusted in the radial direction of the transmission shaft, a sleeve type pushing and pressing assembly is concentrically arranged on the outer side of the transmission shaft and comprises a sleeve body and a plurality of limiting blocks, and the limiting blocks are arranged on the sleeve body. The limiting blocks are arranged in an annular array and detachably connected to the end of the sleeve body, and the limiting blocks can be adjusted in the radial direction of the sleeve body. A clamping chuck is arranged at the end, close to the chamfering tool assembly, of the transmission shaft, the clamping chuck and the transmission shaft are concentrically arranged, telescopic driving mechanisms are arranged on the outer circle of the clamping chuck in an annular array mode, and one ends of the telescopic driving mechanisms are connected with the sleeve type pushing and pressing assembly and suitable for driving the sleeve type pushing and pressing assembly to be away from or close to the clamping chuck. The spring chamfering mechanism is reasonable in structure and capable of chamfering the end faces of springs of different specifications, and the application range of the chamfering mechanism is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of spring processing, in particular to a spring inner chamfering mechanism. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. Its characteristic is that it deforms under the action of external force and returns to its original shape after the external force disappears. Springs are usually metal products formed by bending round or square wires. Due to the shape and position characteristics of the wire itself, the spring bent into a spiral shape needs to be flattened at both ends, which is usually processed by grinding. However, for springs in some application scenarios, the process requirements are higher. For example, after the spring made of square wire is ground flat, burrs will appear on the inner and outer edges of the spring end face, and chamfering is required. Therefore, a chamfering mechanism is required to deal with the burrs on the spring end face.

[0003] Publication (announcement) number: CN220278465U discloses a spring internal chamfering mechanism, including a spring workpiece, a centering fixture, a tool rod and a sleeve, the tool rod being rotatably inserted into the sleeve, the spring workpiece being fixed on the centering fixture, the spring workpiece, the sleeve and the tool rod being concentrically arranged along the feed direction F of the tool rod; the sleeve can move along the feed direction F and abut against the machined end face of the spring workpiece, and a blade is provided at one end of the tool rod opposite to the machined end face of the spring workpiece.

[0004] The above-mentioned prior art solution has the following defects: since the inner diameter of the sleeve is constant and the size of the clamping opening on the centering fixture is constant, only springs with a single outer diameter specification can be fixed, that is, the chamfering mechanism can only chamfer springs with a single outer diameter specification, which reduces the scope of use of the chamfering mechanism. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a spring internal chamfering mechanism, which can chamfer the end faces of springs of different specifications and expand the application range of the chamfering mechanism.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a spring internal chamfering mechanism, characterized in that it comprises: a transmission shaft and a chamfering tool assembly detachably connected to one end of the transmission shaft, the chamfering tool assembly can be adjusted along the radial direction of the transmission shaft, a sleeve-type pushing assembly is concentrically provided on the outer side of the transmission shaft, the sleeve-type pushing assembly comprises a sleeve body and a plurality of limit blocks, the limit blocks are arranged in an annular array and detachably connected to the end of the sleeve body, and the limit blocks can be adjusted along the radial direction of the sleeve body;

[0007] A clamping chuck is provided at one end of the transmission shaft close to the chamfering tool assembly. The clamping chuck is arranged concentrically with the transmission shaft. The outer circular ring array of the clamping chuck is provided with a telescopic driving mechanism. One end of the telescopic driving mechanism is connected to the sleeve-type pushing assembly, which is suitable for driving the sleeve-type pushing assembly away from or close to the clamping chuck.

[0008] By adopting the above technical scheme, when in use, the chamfering mechanism of the present application can be installed on an ordinary lathe, the transmission shaft is connected to the driving shaft of the ordinary lathe, the spring to be chamfered is placed in the inner hole of the clamping chuck, the end of the spring to be chamfered is located outside the clamping chuck, and the clamping chuck is operated to clamp and fix the spring. According to the outer diameter of the spring, the limit block is adjusted to move along the radial direction of the sleeve body so that when the telescopic driving mechanism works to drive the sleeve-type pushing assembly to move toward the spring, the limit block squeezes and positions the end of the spring. Under the driving action of external force, the clamping chuck moves toward the chamfering tool assembly on the transmission shaft, and the chamfering tool assembly chamfers the end surface of the spring, that is, the sleeve-type pushing assembly can squeeze and position springs of different specifications, the clamping chuck can clamp and fix springs of different specifications, and the chamfering tool assembly can be adjusted along the radial direction of the transmission shaft, so as to be suitable for chamfering springs of different specifications, thereby expanding the scope of use of the chamfering mechanism.

[0009] In a preferred example, the utility model can be further configured as follows: the telescopic drive mechanism includes no less than 2 telescopic drive rod assemblies, the telescopic drive rod assemblies are arranged in a circular array, the telescopic drive rod assembly includes an electric push rod, a connecting rod connected at both ends thereof and a fixed seat, one end of the connecting rod is connected to the outer cylindrical surface of the sleeve body, and the fixed seat is connected to the clamping chuck.

[0010] By adopting the above technical solution, when the telescopic rod of the electric push rod contracts, it drives the sleeve-type pushing assembly to move toward the spring. The limit block on the sleeve-type pushing assembly contacts the spring and continues to squeeze it, thereby fixing the spring, making it easier for the chamfering tool assembly to chamfer the spring.

[0011] In a preferred example, the utility model can be further configured as follows: a circular array at one end of the sleeve body is provided with sliding grooves equal in number to the limit blocks, the limit blocks are arranged in the sliding grooves, a waist-shaped hole is provided on the limit block, a screw is arranged in the waist-shaped hole, and the end of the screw is spirally connected to the sleeve body.

[0012] By adopting the above technical solution, after loosening the screw in the waist-shaped hole, the limit block is adjusted in the sliding groove along the radial direction of the sleeve body, so that the limit block can extrude and position the spring end with different outer diameter specifications. After the position of the limit block is determined, the locking screw is tightened to fix the sleeve body and the limit block.

[0013] In a preferred example, the utility model can be further configured as follows: a clamping groove is provided at the end of the transmission shaft, the chamfering tool assembly includes an L-shaped shank and a chamfering blade, the L-shaped shank is arranged in the inner cavity of the clamping groove, the L-shaped shank is provided with a second waist-shaped hole, and no less than two screws are provided in the second waist-shaped hole, and the screws are spirally connected to the transmission shaft, and the chamfering blade is provided with no less than two circular holes, and screws are respectively provided in the circular holes, and the screws are spirally connected to the L-shaped shank.

[0014] By adopting the above technical solution, the screw in the second waist-shaped hole is loosened, and the L-shaped tool handle moves in the clamping groove along the radial direction of the transmission shaft to adjust the distance between the chamfering blade and the axis of the transmission shaft. This is suitable for chamfering springs with different outer diameters, thereby expanding the scope of use. The chamfering blade is connected to the L-shaped tool handle by a screw, which facilitates the replacement of the chamfering blade and improves the convenience of maintenance.

[0015] In a preferred example, the present invention can be further configured as follows: an outer circumferential surface of the clamping chuck is connected to an H-shaped fixing frame.

[0016] By adopting the above technical solution, the lower end of the H-shaped fixed frame is connected to the slide of the ordinary lathe, and the slide of the ordinary lathe is operated to move, thereby driving the clamping chuck on the H-shaped fixed frame to move.

[0017] In summary, the present invention includes at least one of the following beneficial technical effects:

[0018] The limit block on the sleeve-type pushing assembly can move along its radial direction, and can extrude and position springs with different outer diameters. The clamping chuck can clamp and fix springs with different outer diameters. The chamfering tool assembly can be adjusted along the radial direction of the transmission shaft, so it is suitable for chamfering springs with different outer diameters, thereby expanding the use range of the chamfering mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of a spring inner chamfering mechanism of the utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle sleeve push assembly.

[0022] Figure 3yes Figure 1 Schematic diagram of the structure connecting the middle transmission shaft and the chamfering tool assembly.

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle H-shaped fixed frame.

[0024] In the figure: 1, transmission shaft; 20, chamfering tool assembly; 30, sleeve-type push assembly; 4, clamping chuck; 50, telescopic drive rod assembly; 6, sliding groove; 7, waist-shaped hole 1; 8, clamping groove; 9, H-shaped fixed frame;

[0025] 21. L-shaped handle; 22. chamfered blade; 23. waist-shaped hole II; 24. round hole;

[0026] 31. casing body; 32. limiting block;

[0027] 51. Electric push rod; 52. Connecting rod; 53. Fixed seat. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] It should be noted that these drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] Reference Figures 1 to 4 , is a spring internal chamfering mechanism disclosed by the utility model, comprising: a transmission shaft 1 and a chamfering tool assembly 20 detachably connected to one end of the transmission shaft 1, the chamfering tool assembly 20 can be adjusted along the radial direction of the transmission shaft 1, a clamping groove 8 is provided at the end of the transmission shaft 1, the chamfering tool assembly 20 comprises an L-shaped tool handle 21 and a chamfering blade 22, the L-shaped tool handle 21 is arranged in the inner cavity of the clamping groove 8, a waist-shaped hole 23 is provided on the L-shaped tool handle 21, and no less than 2 screws are provided in the waist-shaped hole 23, and the screws are spirally connected to the transmission shaft 1, and no less than 2 circular holes 24 are provided on the chamfering blade 22, and screws are respectively provided in the circular holes 24, so as to facilitate the replacement of the chamfering blade 22, and the screws are spirally connected to the L-shaped tool handle 21; the L-shaped tool handle 21 moves in the clamping groove 8 along the radial direction of the transmission shaft 1, so as to adjust the distance between the chamfering blade 22 and the axis of the transmission shaft 1, so as to facilitate the chamfering of springs of different specifications, and expand the scope of use.

[0031] A sleeve-type pushing assembly 30 is concentrically provided on the outer side of the transmission shaft 1. The sleeve-type pushing assembly 30 includes a sleeve body 31 and a plurality of limit blocks 32. The limit blocks 32 are arranged in an annular array and are detachably connected to the end of the sleeve body 31, and the limit blocks 32 can be adjusted along the radial direction of the sleeve body 31; a sliding groove 6 equal in number to the limit blocks 32 is provided in an annular array at one end of the sleeve body 31, and the limit blocks 32 are arranged in the sliding groove 6, and a waist-shaped hole 7 is provided on the limit block 32, and a screw is provided in the waist-shaped hole 7, and the end of the screw is spirally connected to the sleeve body 31; after loosening the screw in the waist-shaped hole 7, the limit block 32 is adjusted in the sliding groove 6 along the radial direction of the sleeve body 31. After the radial position of the limit block 32 is determined, the locking screw makes the limit block 32 fixedly connected to the sleeve body 31, so that the limit block 32 can squeeze and position the spring ends with different outer diameters.

[0032] A clamping chuck 4 is provided at one end of the transmission shaft 1 close to the chamfering tool assembly 20. The clamping chuck 4 is arranged concentrically with the transmission shaft 1. The outer cylindrical surface of the clamping chuck 4 is connected to an H-shaped fixed frame body 9. The lower end of the H-shaped fixed frame body 9 is fixedly connected to the slide of an ordinary lathe. The ordinary lathe is operated to drive the spring on the clamping chuck 4 to move toward the chamfering tool assembly 20, and the chamfering tool assembly 20 chamfers the end surface of the spring.

[0033] The outer circular ring array of the clamping chuck 4 is provided with a telescopic driving mechanism, one end of the telescopic driving mechanism is connected to the sleeve-type pushing assembly 30, and is suitable for driving the sleeve-type pushing assembly 30 away from or close to the clamping chuck 4; the telescopic driving mechanism includes no less than 2 telescopic driving rod assemblies 50, and the telescopic driving rod assemblies 50 are arranged in a ring array. The telescopic driving rod assembly 50 includes an electric push rod 51, a connecting rod 52 connected at both ends thereof and a fixed seat 53, one end of the connecting rod 52 is connected to the outer circular surface of the sleeve body 31, and the fixed seat 53 is connected to the clamping chuck 4; when the telescopic rod of the electric push rod 51 contracts, the sleeve-type pushing assembly 30 is driven to move toward the spring, and the limit block 32 on the sleeve-type pushing assembly 30 continues to squeeze after contacting the spring, thereby fixing the spring, making it convenient for the chamfering tool assembly 20 to chamfer the end face of the spring.

[0034] The implementation principle of this embodiment is as follows: when in use, the chamfering mechanism of the present application can be installed on an ordinary lathe, the transmission shaft 1 is connected to the driving shaft of the ordinary lathe, the clamping chuck 4 is connected to the slide of the ordinary lathe through the H-shaped fixed frame 9, the spring to be chamfered is placed in the inner hole of the clamping chuck 4, the end of the spring to be chamfered is located outside the clamping chuck 4, the clamping chuck 4 is operated to clamp and fix the spring, and according to the outer diameter of the spring, the limit block 32 is adjusted to move along the radial direction of the sleeve body 31, so that the telescopic drive mechanism works to drive the sleeve type pushing assembly 30 toward the spring During movement, the limit block 32 squeezes and positions the end of the spring. When operating an ordinary lathe, under the driving action of its slide, the clamping chuck 4 moves toward the chamfering tool assembly 20 on the transmission shaft 1, and the chamfering tool assembly 20 chamfers the end surface of the spring, that is, the sleeve-type pushing assembly 30 can squeeze and position springs with different outer diameters, the clamping chuck 4 can clamp and fix springs with different outer diameters, and the chamfering tool assembly 20 can be adjusted along the radial direction of the transmission shaft 1, so as to be suitable for chamfering springs of different specifications, thereby expanding the scope of use of the chamfering mechanism.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spring internal chamfering mechanism, characterized in that: include: A transmission shaft (1) and a chamfering tool assembly (20) detachably connected to one end of the transmission shaft (1), the chamfering tool assembly (20) being adjustable along the radial direction of the transmission shaft (1), a sleeve-type pushing assembly (30) being concentrically arranged on the outer side of the transmission shaft (1), the sleeve-type pushing assembly (30) comprising a sleeve body (31) and a plurality of limit blocks (32), the limit blocks (32) being arranged in an annular array and detachably connected to the ends of the sleeve body (31), the limit blocks (32) being adjustable along the radial direction of the sleeve body (31); A clamping chuck (4) is provided at one end of the transmission shaft (1) close to the chamfering tool assembly (20), and the clamping chuck (4) is arranged concentrically with the transmission shaft (1). An outer annular array of the clamping chuck (4) is provided with a telescopic driving mechanism, and one end of the telescopic driving mechanism is connected to a sleeve-type pushing assembly (30) and is suitable for driving the sleeve-type pushing assembly (30) to move away from or close to the clamping chuck (4).

2. The spring inner chamfering mechanism according to claim 1, characterized in that: The telescopic drive mechanism comprises no less than two telescopic drive rod assemblies (50), the telescopic drive rod assemblies (50) are arranged in a ring array, the telescopic drive rod assembly (50) comprises an electric push rod (51), a connecting rod (52) connected at both ends thereof, and a fixing seat (53), one end of the connecting rod (52) is connected to the outer circumferential surface of the sleeve body (31), and the fixing seat (53) is connected to the clamping chuck (4).

3. The spring inner chamfering mechanism according to claim 1, characterized in that: A circular array is provided at one end of the sleeve body (31) with a number of sliding grooves (6) equal to the number of the limiting blocks (32); the limiting blocks (32) are provided in the sliding grooves (6); the limiting blocks (32) are provided with waist-shaped holes (7); the waist-shaped holes (7) are provided with screws; the ends of the screws are spirally connected to the sleeve body (31).

4. The spring inner chamfering mechanism according to claim 1, characterized in that: The end of the transmission shaft (1) is provided with a clamping groove (8), and the chamfering tool assembly (20) comprises an L-shaped tool handle (21) and a chamfering blade (22), wherein the L-shaped tool handle (21) is arranged in the inner cavity of the clamping groove (8), and the L-shaped tool handle (21) is provided with a second waist-shaped hole (23), and the second waist-shaped hole (23) is provided with at least two screws, and the screws are spirally connected to the transmission shaft (1), and the chamfering blade (22) is provided with at least two circular holes (24), and the circular holes (24) are respectively provided with screws, and the screws are spirally connected to the L-shaped tool handle (21).

5. The spring inner chamfering mechanism according to claim 1, characterized in that: The outer circumferential surface of the clamping chuck (4) is connected to an H-shaped fixing frame (9).

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