Automatic centering device for Morse cone reamer

Abstract

The invention discloses an automatic centering device for a Morse cone reamer. The automatic centering device comprises a shaft sleeve and a tail handle, one end of the tail handle is in threaded connection with a threaded hole in the center of the tail handle clamping jaw, and the circumferential side of the tail handle clamping jaw is in threaded connection with the outer sleeve. The outer sleeve is sleeved at one end of the shaft sleeve; the middle clamping jaw is movably arranged in the outer sleeve, a through hole is formed in the center of the middle clamping jaw, a first ball is embedded in the through hole, and a pair of symmetrical notches are formed in the circumferential side of the middle clamping jaw. Two second balls are arranged in each notch; the two second balls abut against the side walls of the two ends of one notch correspondingly. A first clamping jaw and a second clamping jaw are embedded between the two second balls; the first clamping jaw is fixedly connected to the tail handle clamping jaw; the second clamping jaw is fixedly connected to the bushing clamping jaw; a threaded hole preset in the center of the bushing clamping jaw is connected with the shaft sleeve threaded head; stop pins are connected to the centers of the end parts of the tail handle and the shaft sleeve; the two stop pins abut against the two sides of the first ball respectively. The reamer is installed on the floating connection structure so as to cope with uneven stress when the reamer works, automatic centering and alignment of the reamer are achieved, deflection of the reamer is avoided, the machining precision is improved, the structure is simple, and operation is convenient; the adaptability is high, and machining of various reaming holes can be met; wide popularization and application values are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an automatic centering device for a Morse taper reamer. Background Art

[0002] A reamer is a rotary tool with one or more teeth for removing a thin layer of metal from the surface of a processed hole. It is mainly used for expanding or repairing holes. The reamer has a high processing accuracy due to its small cutting volume. The traditional method of reaming holes is to use a Morse taper to hard-connect. This processing method cannot automatically center, cannot cope with the differences in the uneven roughness of the inner wall of the workpiece hole, and the uneven roughness positions are not all on the same two-dimensional plane, which will cause eccentric reaming, and the roundness and surface roughness of the reamed hole are not easy to guarantee. In order to deal with the eccentric reaming problem, in the prior art, such as the patent "Self-centering Positioning Reamer" with announcement number CN 216462204 U, the reamer is provided with a first centering guide angle and a second centering guide angle to guide the reamer to coincide with the axis of the workpiece hole during feeding. The problem is that this method cannot overcome the problem of uneven roughness of the inner wall of the workpiece hole, and the processing accuracy is still not high enough. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an automatic centering device for a Morse taper reamer. The reamer is installed on a floating connection structure to cope with uneven force when the reamer is working, realize automatic centering and alignment of the reamer, avoid eccentric reaming, and improve processing accuracy.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic centering device for a Morse cone reamer, comprising a sleeve for connecting the Morse cone reamer and a tail handle for connecting and driving the reamer to rotate; one end of the tail handle is threadedly connected to a threaded hole in the center of the tail handle claw, and a thread is provided on the circumferential side of the tail handle claw for threaded connection with an outer sleeve; the outer sleeve is sleeved on one end of the sleeve and has a clearance fit with the sleeve; the middle jaw is movably arranged in the outer sleeve, and a through hole is provided at the center thereof, and a first ball bearing is embedded in the through hole A pair of symmetrical notches are provided on the circumferential side of the middle claw; two second balls are provided in each notch; the two second balls respectively rest on the side walls at both ends of one of the notches; the first claw and the second claw are embedded between the two second balls; the first claw is fixedly connected to the tail handle claw; the second claw is fixedly connected to the bushing claw; the threaded hole preset in the center of the bushing claw is connected to the threaded head of the sleeve; the end centers of the tail handle and the sleeve are both connected with stop pins; the two stop pins respectively support the two sides of the first ball.

[0005] As a further optimization, the stop pins at the end centers of the tail handle and the sleeve are both detachable.

[0006] As a further optimization, stop pin holes are respectively provided at the centers of the ends of the tail handle and the shaft sleeve for inserting the stop pin.

[0007] As a further optimization, the circumferential side of the stop pin is provided with at least one groove running through both ends thereof.

[0008] As a further optimization, the outer surface of the stop pin is provided with a quenching hardening layer.

[0009] As a further optimization, the first ball and the second ball have the same diameter.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the reamer is installed on the floating connection structure to cope with the uneven force when the reamer is working, realize the automatic centering and alignment of the reamer, avoid eccentric reaming, and improve the processing accuracy, and the structure is simple and easy to operate; it has strong adaptability and can meet the processing of various reaming holes; it has wide promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0012] Figure 2 It is a partial enlarged view of the outer sleeve of an embodiment of the present invention;

[0013] Figure 3 It is a schematic diagram of the cross-sectional structure of an embodiment of the present invention;

[0014] Figure 4 is a schematic diagram of the cross-sectional structure of the first rolling ball in an embodiment of the present invention;

[0015] Figure 5 is a schematic cross-sectional structure diagram of a shaft sleeve in an embodiment of the present invention;

[0016] Figure 6 It is a structural schematic diagram of the bushing claw in an embodiment of the present invention;

[0017] Figure 7 is a schematic cross-sectional structure diagram of a jacket in an embodiment of the present invention;

[0018] Figure 8 This is a schematic diagram of the structure of the middle clamping claw in an embodiment of the present invention;

[0019] Fig. 9 is a schematic cross-sectional structure diagram of the middle clamping jaw in an embodiment of the present invention;

[0020] Fig.10 It is a schematic structural diagram of a stop pin in an embodiment of the present invention;

[0021] Fig.11 This is a schematic diagram of the structure of the tail handle claw in an embodiment of the present invention;

[0022] Fig.12 Schematic diagram of the structure of the tail handle in an embodiment of the present invention.

[0023] The correspondence between the technical features and the reference numerals in the figure is: sleeve 1; bushing claw 2; outer sleeve 3; middle claw 4; second ball 5; stop pin 6; tail handle claw 7; tail handle 8; first ball 9; first claw 10; second claw 11. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figure 1-12 The present invention provides a technical solution: an automatic centering device for a Morse taper reamer, the device comprises a sleeve 1, a bushing claw 2, an outer sleeve 3, an intermediate claw 4, a second ball 5, a stop pin 6, a tail handle claw 7, a tail handle 8, and a first ball 9; the sleeve 1 is used to install the Morse taper reamer, the tail handle 8 and the tail handle claw 7 are connected by threads, the tail handle 8 has a built-in stop pin 6, the tail handle claw 7 and the outer sleeve 3 are connected by threads, the intermediate claw 4 has a built-in ball, the sleeve 1 and the sleeve claw 2 are connected by threads, the sleeve 1 has a built-in stop pin 6, the center and the notch side of the intermediate claw 4 are respectively arranged with a first ball 9 and a second ball 5, the intermediate claw 4 floats in the outer sleeve 3, the device drives the sleeve 1 by the rotation of the tail handle 8, the Morse taper reamer in the sleeve 1 first recognizes the prefabricated hole, and then automatically centers by rolling the second ball 5, and at the same time the tail handle 8 performs axial movement to complete the reaming process.

[0026] More specifically, the automatic centering device for the Morse cone reamer includes a sleeve 1 for connecting the Morse cone reamer and a tail handle 8 for connecting and driving the reamer to rotate; the exemplary tail handle 8 is connected to the chuck of the drilling machine to provide rotational power. One end of the tail handle 8 is threadedly connected to the threaded hole in the center of the tail handle claw 7, and the circumferential side of the tail handle claw 7 is provided with a thread for threading with the outer sleeve 3; the outer sleeve 3 is sleeved on one end of the sleeve 1 and is clearance-matched with the sleeve 1; to avoid the sleeve 1 from getting stuck.

[0027] The middle clamping jaw 4 is movably arranged in the outer sleeve 3, and a through hole is provided at the center thereof, in which a first ball 9 is embedded, and a pair of symmetrical notches are provided on the circumferential side thereof; two second balls 5 are provided in each of the notches; the two second balls 5 respectively abut against the side walls at both ends of one of the notches; the first clamping jaw 10 and the second clamping jaw 11 are embedded between the two second balls 5; it can be seen that the middle clamping jaw 4 is floating, but the four second balls 5 evenly distributed in the circumferential direction remain in position, so as to keep the first ball 9 always in the center, and then the middle clamping jaw 4 can be automatically centered.

[0028] The first clamping claw 10 is fixedly connected to the tail handle clamping claw 7; the second clamping claw 11 is fixedly connected to the bushing clamping claw 2; the threaded hole preset in the center of the bushing clamping claw 2 is connected to the threaded head of the sleeve 1; thereby playing a role in transmitting torque.

[0029] The ends of the tail handle 8 and the sleeve 1 are both connected with stop pins 6; the two stop pins 6 respectively support the two sides of the first ball 9, thereby maintaining the axial positioning of the first ball 9.

[0030] In order to replace the stop pin 6 when it is worn, the stop pin 6 at the center of the end of the tail handle 8 and the shaft sleeve 1 is detachable. The preferred detachable manner is to provide a stop pin hole at the center of the end of the tail handle 8 and the shaft sleeve 1 for inserting the stop pin 6.

[0031] Preferably, the circumferential side of the stop pin 6 is provided with at least one groove penetrating through both ends thereof, so as to facilitate the use of a hook to pick out the stop pin 6 from the stop pin hole, and facilitate removal.

[0032] In order to reduce wear and increase service life, the outer surface of the stop pin 6 is provided with a quenching hardening layer.

[0033] In order to improve versatility and reduce costs, the first ball 9 and the second ball 5 have the same diameter, and both have a quenching hardening layer on their surfaces.

[0034] When in use, the device is first assembled, and then the tail handle 8 is installed on the tailstock of a lathe or the spindle of a vertical drilling machine, etc.; then the Morse taper reamer is installed in the sleeve 1; the tail handle 8 performs reaming processing on the prefabricated hole through rotation and axial movement; after the processing is completed, the tail handle 8 can be returned to its original position.

[0035] The advantages of this embodiment are that the reamer is installed on the floating connection structure to cope with uneven force when the reamer is working, realize automatic centering and alignment of the reamer, avoid eccentric reaming, and improve processing accuracy. In addition, it has a simple structure and is easy to operate; it has strong adaptability and can meet the processing of various reaming holes; it has wide promotion and application value.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic centering device for a Morse taper reamer, comprising a sleeve 1 for connecting the Morse taper reamer and a tail handle (8) for connecting and driving the reamer to rotate; characterized in that: One end of the tail handle (8) is threadedly connected to a threaded hole in the center of the tail handle claw (7); a thread is provided on the circumferential side of the tail handle claw (7) for threaded connection with the outer sleeve (3); the outer sleeve (3) is sleeved on one end of the shaft sleeve (1) and is clearance-matched with the shaft sleeve (1); The middle clamping claw (4) is movably arranged in the outer sleeve (3), and a through hole is provided at the center thereof, in which a first ball (9) is embedded; a pair of symmetrical notches are provided on the circumferential side of the middle clamping claw (4); two second balls (5) are provided in each of the notches; the two second balls (5) respectively abut against the side walls at both ends of one of the notches; the first clamping claw (10) and the second clamping claw (11) are embedded between the two second balls (5); The first clamping claw (10) is fixedly connected to the tail handle clamping claw (7); the second clamping claw (11) is fixedly connected to the bushing clamping claw (2); a threaded hole preset in the center of the bushing clamping claw (2) is connected to the threaded head of the shaft sleeve (1); The end centers of the tail handle (8) and the shaft sleeve (1) are both connected with stop pins (6); the two stop pins (6) respectively support the two sides of the first ball (9).

2. The automatic centering device for a Morse taper reamer according to claim 1, characterized in that: The tail handle (8) and the stop pin (6) at the end center of the shaft sleeve (1) are both detachable.

3. The automatic centering device for a Morse taper reamer according to claim 2, characterized in that: Stop pin holes are respectively provided at the centers of the ends of the tail handle (8) and the shaft sleeve (1) for inserting the stop pin (6).

4. The automatic centering device for a Morse taper reamer according to claim 3, characterized in that: The circumferential side of the stop pin (6) is provided with at least one groove penetrating through both ends thereof.

5. The automatic centering device for a Morse taper reamer according to claim 4, characterized in that: The outer surface of the stop pin (6) is provided with a quenching hardening layer.

6. The automatic centering device for a Morse taper reamer according to claim 1, characterized in that: The first rolling ball (9) and the second rolling ball (5) have the same diameter.

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