Clamp for forming key groove in outer circular surface of gear shaft

Abstract

The utility model discloses a gear shaft excircle surface keyway fixture, which belongs to the technical field of gear shaft keyway fixtures, and comprises a support and a support component, the support comprises a base, a fixed plate and a movable plate, the fixed plate and the movable plate are oppositely arranged on the base, the movable plate can slide relative to the fixed plate, and the fixed plate and the movable plate are provided with a three-jaw chuck for clamping a gear shaft. The supporting assembly comprises two supporting strips symmetrically arranged on the two sides of the lower portion of the gear shaft, the opposite surfaces of the two supporting strips are arranged to be supporting inclined faces, the supporting inclined faces abut against the peripheral face of the gear shaft, and the two supporting strips are arranged on the base in a sliding mode and can synchronously move in the direction close to or away from each other. According to the clamp for forming the key groove in the outer circle face of the gear shaft, the two supporting strips which can be close to or far away from each other can effectively support the gear shaft, the supporting inclined faces on the supporting strips can adapt to gear shafts of different thicknesses, and the clamp is wide in universality and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of a gear shaft keyway clamp, in particular to a gear shaft outer cylindrical surface keyway clamp. Background Art

[0002] The gear shaft cooperates with the gear, serving as the mounting carrier of the gear, and is also used to transmit power. In order to meet the needs of installation and use, it is necessary to open a keyway on the outer cylindrical surface of the gear shaft to facilitate the key connection between the gear shaft and the gear. When milling the keyway, the gear shaft needs to be fixed and clamped on the milling machine operating platform, and then the milling cutter is used to open the groove on the outer cylindrical surface. A three-jaw chuck is usually used to clamp and fix the gear shaft. When the gear shaft is clamped and fixed, the gear shaft is usually in a suspended state. During the grooving operation of the milling cutter equipment, the pressure exerted by the milling cutter on the gear shaft will cause the gear shaft to bend and deform. The longer the gear shaft is, the more obvious this deformation phenomenon is, which seriously affects the grooving accuracy and the processing quality of the gear shaft.

[0003] Therefore, how to provide a keyway tooling that prevents the gear shaft from being deformed during slot milling has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by the utility model is that in the prior art, when a milling cutter mills a keyway on a gear shaft, the gear shaft is easily deformed, resulting in low product quality. Based on this, the utility model provides a clamp that can prevent the gear shaft from being deformed when a keyway is cut.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a clamp for opening a keyway on the outer cylindrical surface of a gear shaft, comprising a bracket and a support assembly, the bracket comprising a base and a fixed plate and a movable plate relatively arranged on the base, the movable plate being slidable relative to the fixed plate, the fixed plate and the movable plate being provided with a three-jaw chuck for clamping the gear shaft, the support assembly comprising two support bars symmetrically arranged on both sides below the gear shaft, the opposite surfaces on the two support bars being arranged as support inclined surfaces, the support inclined surfaces being abutted against the outer peripheral surface of the gear shaft, the two support bars being slidably arranged on the base, and the two support bars being able to move synchronously in a direction of approaching or moving away from each other.

[0006] Furthermore, a slide groove is provided on the upper surface of the base, a slide rail is provided at the bottom of the support bar, the slide rail is slidably connected to the slide groove, and the length direction of the slide groove is perpendicular to the length direction of the gear shaft.

[0007] Furthermore, a screw rod is rotatably provided on the base, the screw rod and the slide groove are parallel to each other, and the screw rod has a first thread segment and a second thread segment with opposite thread rotation directions, the first thread segment is threadedly connected to one of the support bars, and the second thread segment is threadedly connected to the other support bar.

[0008] Furthermore, each of the support bars is provided with two slide rails, the two slide rails are respectively located on two opposite sides of the support bar, and the screw rod is located between the two slide rails.

[0009] Furthermore, two support blocks are fixedly mounted on the upper surface of the base at both sides of the support bar, the screw rod is rotatably connected to the support block, and a bearing is arranged between the screw rod and the support block.

[0010] Furthermore, a rotating handwheel is fixedly provided on any end of the screw rod.

[0011] Furthermore, a guide groove is provided on the base, a slider is fixedly installed on the bottom of the movable plate, and the slider is slidably connected to the guide groove.

[0012] Furthermore, a cylinder is provided on the base, a cylinder body of the cylinder is fixedly connected to the base, and an extended end of the cylinder is fixedly connected to the movable plate.

[0013] The beneficial effects of the utility model are as follows: the gear shaft outer cylindrical surface keyway clamp of the utility model, the two support bars are supported on both sides below the gear shaft, which plays a good supporting role for the gear shaft, and effectively avoids the situation where the gear shaft is easily bent and deformed by the milling cutter due to being suspended in the air. At the same time, the supporting inclined surface on the support bar can adapt to gear shafts of different thicknesses, so that the supporting inclined surface of the support bar can be against the gear shaft when moving, and it has wide versatility and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a three-dimensional diagram of the clamp for opening a keyway on the outer cylindrical surface of a gear shaft of the utility model;

[0016] Figure 2 yes Figure 1 A three-dimensional view of the fixture for opening a keyway on the outer cylindrical surface of the gear shaft from another perspective;

[0017] Figure 3 yes Figure 1 A top view of a fixture for opening a keyway on the outer cylindrical surface of a gear shaft;

[0018] Figure 4 yes Figure 3The shown figure is a cross-sectional view of the fixture for opening a keyway on the outer cylindrical surface of the gear shaft along AA.

[0019] In the figure: 1, gear shaft, 10, bracket, 11, base, 12, fixed plate, 13, movable plate, 14, three-jaw chuck, 110, cylinder, 111, slide groove, 112, screw rod, 1121, first thread segment, 1122, second thread segment, 113, support block, 114, guide groove, 115, rotating hand wheel, 131, slider, 20, support assembly, 21, support bar, 210, support inclined plane, 211, slide rail. DETAILED DESCRIPTION

[0020] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0021] See also Figure 1-Figure 4 The utility model provides a fixture for opening a keyway on the outer cylindrical surface of a gear shaft, which is suitable for a cylindrical gear shaft 1. The fixture includes a bracket 10 and a support assembly 20. When installed, the bracket 10 is installed on the milling platform of a milling machine, and the gear shaft 1 to be milled with a keyway is installed on the bracket 10. The support assembly 20 is installed on the bracket 10 to support the gear shaft 1. When in use, the milling machine is turned on, and the milling cutter moves along the length direction of the gear shaft 1, thereby milling a keyway on the outer cylindrical surface of the bracket 10 gear shaft 1.

[0022] The bracket 10 includes a base 11, a fixed plate 12 and a movable plate 13. The base 11 is fixedly mounted on the milling platform of the milling machine. The fixed plate 12 and the movable plate 13 are both flat plate structures. The fixed plate 12 and the movable plate 13 are arranged opposite to each other and are perpendicular to the base 11. The fixed plate 12 is fixedly connected to the base 11, and the movable plate 13 is slidably connected to the base 11, so that the movable plate 13 can slide relative to the fixed plate 12. Three-jaw chucks 14 are installed on the opposite surfaces of the fixed plate 12 and the movable plate 13. The three-jaw chucks 14 are coaxially arranged and used to clamp and fix the ends of the gear shaft 1. When clamping, the distance between the two three-jaw chucks 14 is adjusted by sliding the movable plate 13 to adapt to the clamping of the gear shaft 1, and then the two ends of the gear shaft 1 are clamped and fixed by the three-jaw chucks 14, so that the gear shaft 1 is finally in a horizontal state.

[0023] Furthermore, a guide groove 114 is provided on the base 11 , a slider 131 is fixedly installed on the bottom of the movable plate 13 , the slider 131 is slidably connected to the guide groove 114 , and the cooperation between the slider 131 and the guide groove 114 guides the movement of the movable plate 13 .

[0024] As a preferred embodiment, a cylinder 110 is provided on the base 11, and the cylinder 110 drives the movable plate 13 to slide relative to the base 11. Specifically, the cylinder body of the cylinder 110 is fixedly connected to the base 11, and the extended end of the cylinder 110 is fixedly connected to the movable plate 13.

[0025] The support assembly 20 includes two support bars 21 that are arranged opposite to each other. The two support bars 21 are symmetrically arranged on both sides below the gear shaft 1. The opposite surfaces of the two support bars 21 are arranged as support slopes 210. The support slopes 210 are abutted against the outer cylindrical surface of the gear shaft 1. The two support bars 21 can be slidably arranged on the base 11, and the two support bars 21 can move synchronously in the direction of approaching or moving away from each other.

[0026] When in use, the two support bars 21 are synchronously moved in the direction away from each other to avoid the installation position of the gear shaft 1. After the two ends of the gear shaft 1 are fixedly clamped in the two three-jaw chucks 14, the two support bars 21 are synchronously moved in the direction of approaching each other, so that the outer cylindrical surface of the gear shaft 1 is against the support bevel 210. At this time, the support bar 21 can effectively support the gear shaft 1 to prevent the gear shaft 1 from being deformed due to the pressure of the milling cutter when the milling cutter is milling grooves. Since the opposite surfaces on the support bar 21 are set as the support bevel 210, the support bar 21 is moved in the direction away from or close to each other, and the distance between the two is adjusted, so that it can adapt to gear shafts 1 of different thicknesses, so that when the two support bars 21 are close, the support bevel 210 is against the gear shaft 1, and there is no need to move the support bar 21 upward or downward in the longitudinal direction. The structure is simpler and the operation is more convenient.

[0027] A slide groove 111 is provided on the upper surface of the base 11, and a slide rail 211 is provided at the bottom of the support bar 21. The slide rail 211 is slidably connected to the slide groove 111, and the length direction of the slide groove 111 is perpendicular to the length direction of the gear shaft 1. When the two support bars 21 are close to or away from each other, the slide rail 211 slides along the slide groove 111.

[0028] As a preferred embodiment, a screw rod 112 is rotatably mounted on the base 11, the screw rod 112 is parallel to the slide groove 111, and the screw rod 112 has a first thread segment 1121 and a second thread segment 1122, the threads of the first thread segment 1121 and the second thread segment 1122 have opposite rotation directions, wherein the first thread segment 1121 is threadedly connected to one of the support bars 21, and the second thread segment 1122 is threadedly connected to the other support bar 21, so that when the screw rod 112 rotates, the two support bars 21 can be driven to move closer to or away from each other at the same time. By arranging two thread segments with different rotation directions on the same screw rod 112 to drive the two support bars 21 to move at the same time, the structure is simpler, and the screw rod transmission can realize the micro-feed movement of the support bar 21 with high precision. At the same time, the screw rod 112 and the support bar 21 are threadedly matched, and have a self-locking function, which effectively prevents the support bar 21 from moving easily.

[0029] In a specific embodiment, each support bar 21 is provided with two slide rails 211, and the two slide rails 211 are respectively located on opposite sides of the support bar 21, and the screw rod 112 is located between the two slide rails 211. Preferably, the two slide rails 211 are symmetrically arranged about the screw rod 112 to improve the movement stability of the support bar 21.

[0030] In addition, as a preferred embodiment, two support blocks 113 are fixedly installed on the upper surface of the base 11 on both sides of the support bar 21, and the screw rod 112 is rotatably connected to the support block 113. In order to improve the rotation smoothness between the screw rod 112 and the support block 113, a bearing (not shown) is arranged between the screw rod 112 and the support block 113. Furthermore, a rotating hand wheel 115 for the user to hold is fixedly arranged at any end of the screw rod 112 to facilitate the user to rotate the screw rod 112 for operation.

[0031] It can be understood that in other embodiments not shown, the support bar 21 can also be driven by two push-pull cylinders independently installed on the base 11 to achieve the effect of synchronously approaching or moving away from each other. The specific movement mode of the support bar 21 is not limited here.

[0032] The use process of the clamp for opening a keyway on the outer cylindrical surface of a gear shaft of the utility model is as follows: first, the two support bars 21 are moved away from each other so that the support bars 21 avoid the installation space of the gear shaft 1, and then the gear shaft 1 to be keyed is clamped and fixed between the two three-jaw chucks 14, and then, the two support bars 21 are driven to approach each other until the support inclined surface 210 abuts against the gear shaft 1, and finally, the milling machine is started to open the keyway on the outer cylindrical surface of the gear shaft 1 under the action of the milling cutter.

[0033] The above-mentioned gear shaft outer cylindrical surface keyway clamp has two support bars 21 supported on both sides below the gear shaft 1, which provides good support for the gear shaft 1 and effectively prevents the gear shaft 1 from being easily bent and deformed by the milling cutter due to being suspended in the air. At the same time, the support bevel 210 on the support bar 21 can adapt to gear shafts 1 of different thicknesses, so that the support bevel 210 of the support bar 21 can be against the gear shaft 1 when moving. It has wide versatility and is easy to operate.

[0034] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gear shaft outer cylindrical surface keyway fixture, comprising a bracket and a support assembly, characterized in that: The bracket includes a base and a fixed plate and a movable plate relatively arranged on the base, the movable plate is slidable relative to the fixed plate, the fixed plate and the movable plate are provided with a three-jaw chuck for clamping the gear shaft, the support assembly includes two support bars symmetrically arranged on both sides below the gear shaft, the opposite surfaces on the two support bars are arranged as support inclined surfaces, the support inclined surfaces are abutted against the outer peripheral surface of the gear shaft, the two support bars are slidably arranged on the base, and the two support bars can move synchronously in the direction of approaching or moving away from each other.

2. The clamp for opening a keyway on the outer cylindrical surface of a gear shaft according to claim 1, characterized in that: A slide groove is provided on the upper surface of the base, a slide rail is provided at the bottom of the support bar, the slide rail is slidably connected to the slide groove, and the length direction of the slide groove is perpendicular to the length direction of the gear shaft.

3. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft as claimed in claim 2, characterized in that: A screw rod is rotatably provided on the base, the screw rod and the slide groove are parallel to each other, and the screw rod has a first thread segment and a second thread segment with opposite thread rotation directions. The first thread segment is threadedly connected to one of the support bars, and the second thread segment is threadedly connected to the other support bar.

4. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft as claimed in claim 3, characterized in that: Each of the support bars is provided with two slide rails, the two slide rails are respectively located on two opposite sides of the support bar, and the screw rod is located between the two slide rails.

5. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft as claimed in claim 3, characterized in that: Two support blocks are fixedly mounted on the upper surface of the base at both sides of the support bar, the screw rod is rotatably connected to the support block, and a bearing is arranged between the screw rod and the support block.

6. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft as claimed in claim 3, characterized in that: A rotating hand wheel is fixedly arranged on any end of the screw rod.

7. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft according to claim 1, characterized in that: A guide groove is provided on the base, a sliding block is fixedly installed on the bottom of the movable plate, and the sliding block is slidably connected to the guide groove.

8. The fixture for opening a keyway on the outer cylindrical surface of a gear shaft according to claim 7, characterized in that: A cylinder is arranged on the base, a cylinder body of the cylinder is fixedly connected to the base, and an extended end of the cylinder is fixedly connected to the movable plate.

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