A reamer handle

Abstract

The present invention belongs to the technical field of tool handles, specifically a reamer tool handle, including a tool handle, a steel ball, a transmission part, a steel ball a, a floating part, a steel ball b, a chuck, a retaining frame, an elastomer, an adjusting screw, an O-ring a, an O-ring b, an O-ring c, an O-ring d, and an O-ring. The tool handle drives the chuck to rotate through the steel ball, the transmission part, the steel ball a, the floating part, and the steel ball b. The adjusting screw is connected to the transmission part through the elastomer. The positioning step on the upper end surface of the chuck is connected to the inner circle positioning step of the tool handle through the O-ring, and a retaining frame is provided at the outer circle. The lower end step surface of the chuck has a first groove, and the outer circle of the first groove has a groove for placing the O-ring c. The present invention adopts a rolling friction method. The friction resistance of the reamer under load is only one tenth of the sliding friction resistance of similar products. The floating height of the reamer is free. Only in this way can the accuracy exceeding that of similar products be achieved in the field of reaming holes.

Description

Technical Field

[0001] The invention relates to the technical field of tool handles, in particular to a reamer tool handle. Background Art

[0002] When the reamer enters the hole to ream, the reamer should be able to float freely inside the shank according to actual needs, so that high-precision and high-requirement holes can be reamed. The smaller the resistance to free floating, the higher the precision of the reamed hole will be. On the contrary, when the resistance to free floating is greater, free floating is restricted, and the reamed hole is prone to have problems such as bell-mouth. However, when the reamer can float freely, it is difficult for the reamer to enter the hole due to eccentricity. This contradictory reaming requirement makes it difficult for the reamer shank to achieve coexistence of concentricity and floating.

[0003] Patent CN217316208U is a structure that uses spring pressure for centering and reduces the floating effect to improve the centering effect. When the axial force of the spring is insufficient, the centering effect cannot be achieved or the effect is poor. When the axial force of the spring is increased, the floating resistance is also increased, and the verticality of the reamer and the handle is affected. At the same time, when the reamer is static without load, the internal parts are loosely contacted with each other, and the reamer seems to be able to float freely. When the reamer is loaded, the loose parts are connected into an eccentric whole, which not only makes the reamer deviate from the axis center, but also greatly increases the free floating resistance.

[0004] Patent CN102091960A is a mechanism that makes it difficult to enter the hole due to the reamer's lack of center positioning. When the eccentricity of the reamer is reduced, the floating amount of the reamer is also limited, thereby affecting the processing accuracy. When the floating amount is increased, the circumferential swing of the reamer also increases, resulting in difficulty in entering the hole. At the same time, due to the structural reasons of the torque transmission, the torque of the reaming hole is converted into an axial top force, which greatly increases the resistance of the reamer's free floating.

[0005] The technical solution of patent CN107848044A also does not have the key conditions and elements for machining high-precision holes, and cannot satisfy the requirement that the reamer can float freely with minimal resistance when loaded.

[0006] Therefore, a reamer handle is invented. Summary of the invention

[0007] In view of the above problems and / or the problems existing in the existing reamer handle, the present invention is proposed.

[0008] Therefore, the object of the present invention is to provide a reamer handle that can solve the above-mentioned existing problems.

[0009] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0010] A reamer handle, comprising a handle, a steel ball, a transmission part, a steel ball a, a floating part, a steel ball b, a chuck, a retaining frame, an elastic body, an adjusting screw, an O-ring a, an O-ring b, an O-ring c, an O-ring d, and an O-ring. The handle drives the chuck to rotate through the steel ball, the transmission part, the steel ball a, the floating part, and the steel ball b.

[0011] The adjusting screw is connected to the transmission member through an elastic body;

[0012] The positioning step on the upper end surface of the chuck is connected to the positioning step on the inner circle of the tool handle through an O-ring, and a retaining frame is provided on the outer circle;

[0013] The step surface at the lower end of the chuck has a first groove, the outer circle of the first groove has a groove for placing an O-ring c, and the inner circle of the first groove has a groove for placing an O-ring d;

[0014] The upper end surface of the transmission member is provided with a second groove, the inner circle of the second groove is provided with a groove for accommodating an O-ring a, and the outer circle of the second groove is provided with a groove for accommodating an O-ring b.

[0015] As a preferred solution of the reamer handle described in the present invention, the inner circle of the handle has a rolling groove for placing a steel ball.

[0016] As a preferred solution of the reamer handle described in the present invention, the inner circle of the handle is threadedly connected to the adjusting screw.

[0017] As a preferred solution of the reamer handle described in the present invention, the lower end of the outer circle of the transmission member is provided with a rolling groove for placing a steel ball.

[0018] As a preferred solution of the reamer handle described in the present invention, the floating member is a universal cross coupling, and the upper and lower surfaces are X- and Y-direction steps.

[0019] As a preferred solution of the reamer handle described in the present invention, the elastic body is a spring.

[0020] As a preferred solution of the reamer handle described in the present invention, an O-ring e is provided between the chuck and the adjusting screw to prevent waste chips from entering the handle.

[0021] Compared with existing technologies:

[0022] 1. The structure of this tool holder is much simpler than that of similar products, but it can achieve the precision requirements that similar products cannot achieve when reaming holes.

[0023] 2. The benefits of using O-rings for centering in the reamer handle are:

[0024] 2.1. Processing the step groove of the O-ring is simple and convenient;

[0025] 2.2 Before the reamer enters the hole, the reamer is directly positioned in the center of the handle through the O-ring, so that the reamer and the hole can maintain a high degree of axial concentricity, so the reamer enters the hole safely;

[0026] 2.3. Since the reamer and the hole can maintain a high degree of axial concentricity, the cutting edge is evenly stressed, and single-edged cutting will not cause edge chipping. The service life of the reamer is extended, and the reaming hole can be guaranteed to have high precision and finish.

[0027] 2.4. The O-ring is used for both centering and floating. Since the O-ring is a soft body, it does not affect the free floating when processing steel parts;

[0028] 2.5. O-ring prevents leakage of central coolant.

[0029] 3. The O-ring directly and indirectly locates the floating part, steel ball and chuck, so that the floating part, steel ball and chuck are concentric with the tool handle. The benefits are:

[0030] 3.1. If the floating part, steel ball and chuck are not concentric with the tool handle, it will be difficult for the reamer to enter the hole. The larger the eccentricity, the larger the eccentric diameter of the reamer will be. On the contrary, the reamer will enter the hole safely and smoothly.

[0031] 3.2. Concentricity reduces the floating resistance of the reamer when loaded.

[0032] 4. The present invention adopts rolling friction. The friction resistance of the reamer under load is only one tenth of the sliding friction resistance of similar products. The floating height of the reamer is free. Only in this way can the precision exceeding that of similar products be achieved in the field of reaming holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is the overall structural diagram of the reamer handle of the present invention;

[0034] Figure 2 It is the chuck parts diagram of the present invention;

[0035] Figure 3 The parts diagram of the steel ball a, steel ball b, floating part and transmission part of the present invention;

[0036] Figure 4 It is a side assembly diagram of the retaining frame, tool handle parts, chuck, floating part and transmission part of the present invention.

[0037] In the figure: tool handle 1, steel ball 2, transmission part 3, steel ball a4, floating part 5, steel ball b6, chuck 7, retaining frame 8, elastomer 9, adjusting screw 10, O-ring a11, O-ring b12, O-ring c13, O-ring d14, O-ring 15, O-ring e16. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] The present invention provides a reamer handle, see Figure 1-Figure 4 , including a tool handle 1, a steel ball 2, a transmission part 3, a steel ball a4, a floating part 5, a steel ball b6, a chuck 7, a retaining frame 8, an elastic body 9, an adjusting screw 10, an O-ring a11, an O-ring b12, an O-ring c13, an O-ring d14, and an O-ring 15;

[0040] The tool handle 1 drives the chuck 7 to rotate through the steel ball 2, the transmission member 3, the steel ball a4, the floating member 5, and the steel ball b6. The adjusting screw 10 is connected to the transmission member 3 through the elastic body 9. The positioning step on the upper end surface of the chuck 7 is connected to the inner circle positioning step of the tool handle 1 through the O-ring 15, and a retaining frame 8 is provided at the outer circle. The lower end step surface of the chuck 7 has a first groove, and the outer circle of the first groove has a groove for placing the O-ring c13, and the inner circle of the first groove has a groove for placing the O-ring d14. The upper end surface of the transmission member 3 has a second groove, and the second The inner circle of the groove has a groove for placing an O-ring a11, the outer circle of the second groove has a groove for placing an O-ring b12, the inner circle of the tool handle 1 has a rolling groove for placing the steel ball 2, the inner circle of the tool handle 1 is threadedly connected to the adjusting screw 10, the lower end of the outer circle of the transmission part 3 has a rolling groove for placing the steel ball 2, the floating part 5 is a universal cross coupling, and the upper and lower surfaces are X and Y steps, the elastomer 9 is a spring, and an O-ring e16 is provided between the chuck 7 and the adjusting screw 10 to prevent waste chips from entering the tool handle 1.

[0041] Working principle: The tool holder body 1 connected to the machine tool spindle transmits the torque to the transmission member 3 through the steel ball 2, the transmission member 3 transmits the torque to the floating member 5 through the steel ball a4, and the floating member 5 transmits the torque to the chuck 7 through the steel ball b6;

[0042] The inner thread of the tool handle 1 is connected to the adjusting screw 10, and the tool handle 1 is connected to the chuck 7 through the steel ball in the retaining frame 8. There is an elastic body 9 on the adjusting screw 10, and the elastic body 9 is a spring. Rotating the adjusting screw 10 increases or decreases the spring 9, and the contact pressure of the chuck 7 and the steel ball in the retaining frame 8 on the tool handle 1 is ensured to ensure the verticality of the reamer and the tool handle, while keeping the reamer floating with an angle deviation when necessary;

[0043] The inner circle of the handle 1 has a rolling groove for the steel ball 2, and the outer circle of the transmission member 3 also has a rolling groove for the steel ball 2. The inner circle of the upper end surface plane groove of the transmission member 3 has an O-ring a11 and the outer circle has an O-ring b12, which are used to position the radial floating of the steel ball a4 and the floating member 5. During assembly, the steel ball will not fall due to the O-ring, and the steel ball a4 can roll between the transmission member 3 and the floating member 5.

[0044] The floating member 5 is a universal cross coupling, and the upper and lower surfaces are steps in the X and Y directions. The floating member 5 is connected to the chuck 7 through the steel ball b6, and the steel ball b6 can roll between the chuck 7 and the floating member 5;

[0045] The flat groove on the step surface at the lower end of the chuck 7 has an O-ring c13 on the outer circle and an O-ring d14 on the inner circle, so that the steel ball will not fall during assembly. Since the O-ring is a soft body, the steel ball a4, the floating part 5, and the steel ball b6 can float when necessary. The radial deviation between the reamer and the bottom hole is eliminated through the radial floating of the steel ball a4, the floating part 5, the steel ball b6, and the chuck 7. Since the rolling friction coefficient is only one tenth of the sliding friction coefficient, the friction resistance of the rolling friction structure is much smaller than that of the sliding friction structure. Only in this way can high-precision holes be processed, and at the same time, eccentric rotation and single-edged cutting of the reamer are avoided, and the occurrence of flared mouths or surface scratches, etc. are prevented. The O-ring positions the steel ball a4, the floating part 5, and the steel ball b6, so that the floating part and the steel ball are concentric with the tool handle, which not only reduces the resistance of the reamer when floating, but also strengthens the concentricity of the reamer with the tool handle when entering the hole;

[0046] The intermediate connecting piece between the chuck 7 and the adjusting screw 10 is an O-ring e16, which prevents waste chips from entering the tool handle. There is a retaining frame 8 on the outer circle of the end face of the chuck 7, and a steel ball in the retaining frame contacts the tool handle 1. The middle step on the upper end face of the chuck 7 is connected to the center step of the inner circle of the tool handle 1 through the O-ring 15. Relying on the tool handle body 1 as a reference, the chuck 7 is ensured to be in the center position of the tool handle 1, which ensures the safety of the reamer entering the hole. At the same time, when necessary during reaming, since the O-ring is a soft body, the chuck 7 can float relative to the tool handle body 1, and the O-ring 15 can prevent the leakage of the center coolant.

[0047] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reamer handle, comprising a handle (1), a steel ball (2), a transmission member (3), a steel ball a (4), a floating member (5), a steel ball b (6), a chuck (7), a retaining frame (8), an elastic body (9), an adjusting screw (10), an O-ring a (11), an O-ring b (12), an O-ring c (13), an O-ring d (14), and an O-ring (15), characterized in that: The tool handle (1) drives the chuck (7) to rotate via the steel ball (2), the transmission member (3), the steel ball a (4), the floating member (5) and the steel ball b (6); The adjusting screw (10) is connected to the transmission member (3) via an elastic body (9); The positioning step on the upper end surface of the chuck (7) is connected to the inner circle positioning step of the tool handle (1) through an O-ring (15), and a retaining frame (8) is provided at the outer circle; The step surface at the lower end of the chuck (7) has a first groove, the outer circle of the first groove has a groove for accommodating an O-ring c (13), and the inner circle of the first groove has a groove for accommodating an O-ring d (14); The upper end surface of the transmission member (3) has a second groove, the inner circle of the second groove has a groove for accommodating an O-ring a (11), and the outer circle of the second groove has a groove for accommodating an O-ring b (12); An O-ring e (16) is provided between the chuck (7) and the adjusting screw (10) to prevent waste chips from entering the tool handle (1).

2. A reamer handle according to claim 1, characterized in that: The inner circle of the knife handle (1) is provided with a rolling groove for placing a steel ball (2).

3. A reamer handle according to claim 1, characterized in that: The inner circle of the knife handle (1) is threadedly connected to the adjusting screw (10).

4. A reamer handle according to claim 1, characterized in that: The lower end of the outer circle of the transmission member (3) is provided with a rolling groove for placing the steel ball (2).

5. A reamer handle according to claim 1, characterized in that: The floating member (5) is a universal cross coupling, and the upper and lower surfaces are steps in the X and Y directions.

6. A reamer handle according to claim 1, characterized in that: The elastic body (9) is a spring.

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