Fixture for regrinding toothed pallet pins

Abstract

The utility model relates to a kind of clamps for grinding tooth palm plug pin, belong to the technical field of roller cone drill bit.The clamp for grinding tooth palm plug pin includes cylinder, support block and bearing clamp block fixed on support block;The bearing clamp block is equipped with shaft neck through-hole, for fixing the shaft neck part of tooth palm;The cylinder is equipped with top rod in power output end, and top rod is used to extend into plug pin hole, and push plug pin at the end away from steel ball locking groove, and plug pin hole wall cooperates and tightly pushes plug pin.The utility model is firm to the clamping of tooth palm, can prevent tooth palm plug pin from appearing loose during grinding process, improve grinding efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to a clamp for grinding tooth insert pins, belonging to the field of roller cone drill bit technology. Background Technology

[0002] A tricone drill bit consists of three prongs and three cones. The prongs and cones form a bearing assembly, with rolling steel balls inserted into locking grooves through plug holes on the back of the prongs. After all the steel balls are in the locking grooves, plug holes must be used to prevent steel balls from falling into them. Furthermore, to ensure smooth rolling of the steel balls in the locking grooves, the arc of the plug's tip must align with the arc of the locking groove. Therefore, before assembly, the arc surface of the plug's tip must be ground flush with the arc of the locking groove to ensure smooth passage of the steel balls; this process is called plug finishing.

[0003] Currently, repairing the plug pin requires tightening the plug pin and then locking it with multiple sets of screws. This is troublesome to disassemble, takes a long time to prepare, and has low overall processing efficiency. Furthermore, after long-term use, tooling wear will cause a decrease in processing accuracy and hinder the rolling of the steel ball in the locking groove. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, this invention proposes a clamping device for grinding toothed pins. This device provides a secure clamping mechanism that prevents the toothed pins from loosening during the grinding process, thereby improving grinding efficiency and precision.

[0005] This utility model relates to a clamp for repairing the palm insert pin of a grinding tooth, including a cylinder, a support block and a bearing clamp fixed on the support block;

[0006] The bearing clamp is provided with a journal through hole for fixing the journal of the toothed palm;

[0007] The cylinder is equipped with a push rod at the power output end. The push rod is used to extend into the plug pin hole and push the plug pin at the end away from the steel ball locking groove. It cooperates with the wall of the plug pin hole to tighten the plug pin and prevent the plug pin from loosening during the grinding process.

[0008] In some specific implementation schemes, the cylinder is slidably mounted on the cylinder base; for example, it can be slidably mounted on the cylinder base via a linear moving device structure such as a slide rail or slider. Considering factors such as the reliability of the fixture, ease of maintenance, and cost, several elongated holes can also be provided on the cylinder base, and the cylinder can be fixed to the cylinder base by fasteners passing through the elongated holes. Based on this structure, the cylinder position is adjustable, which can adapt to the position of the plug pin hole of different types of toothed jaws, greatly improving the flexibility and applicability of the fixture.

[0009] In some specific implementation schemes, the bearing clamp is further provided with an installation adjustment groove, which communicates with the journal through hole and forms a lateral opening on the bearing clamp. The bearing clamp has a hammer nut at the lower part of the installation adjustment groove and a corresponding locking screw at the upper part of the groove. When the locking screw and hammer nut are tightened together, the journal of the toothed bearing is locked in the journal through hole. For different models of toothed bearings, only the bearing clamp needs to be replaced, making the operation convenient, quick, and with good stability.

[0010] In some specific implementation schemes, the fixture is equipped with a support, a protective cover, and a sleeve. The support block is fixed to the top of the support, the sleeve is fitted onto the support, and the protective cover is welded to the sleeve to block metal shavings generated during the grinding of the plug pin, preventing flying metal shavings from injuring people and polluting the working environment. Preferably, the protective cover has an open structure, and the sleeve is rotatably fitted onto the support and can be locked to the support by fasteners. More preferably, the protective cover includes a connecting plate and an arc-shaped cover plate. The design of the arc-shaped cover plate makes the protective cover open on the sides and top, which facilitates the work of grinding the plug pin and blocks metal shavings generated during the grinding. The arc-shaped cover plate is welded to the connecting plate, and the connecting plate is welded to the sleeve. The angle of the protective cover relative to the support block can be adjusted by tightening the fasteners to collect metal shavings and prevent them from flying out and injuring workers.

[0011] Preferably, the corresponding support block is fixed to the first base plate by fasteners, the first base plate is fixed to the cover plate by fasteners, and the cover plate is fixed to the top of the support by fasteners.

[0012] In a further preferred embodiment, the first base plate has an inclined surface, and the cylinder base is inclined and locked to the inclined surface of the first base plate by fasteners, so that the base serves as a fixing seat for both the cylinder and the support block, thereby simplifying the structure of the clamp.

[0013] Compared with the prior art, the present invention has the following technical effects:

[0014] 1. During the process of grinding the plug pin to form an arc surface that matches the locking groove of the steel ball, by tightening the plug pin, the loosening of the plug pin during the grinding process and the grinding quality problems caused by the loosening are avoided, which greatly improves the grinding efficiency and quality.

[0015] 2. The cylinder position is adjustable, which can be adapted to different models of toothed jaws, greatly improving the flexibility and applicability of the clamp;

[0016] 3. The protective cover can rotate, which facilitates grinding operations, and the position of the shield can be adjusted according to the direction of metal shavings flying, so as to prevent the shavings from flying out and injuring others. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of Example 1;

[0018] Figure 2 for Figure 1 Schematic diagram of the middle protective cover section;

[0019] Figure 3 This is a schematic diagram of the part of the clamp that holds the toothed palm in Example 1;

[0020] Figure 4 This is a schematic diagram of the plug pin during the tightening process in Example 1;

[0021] In the diagram: 100, bearing clamp; 101, journal through hole; 102, mounting adjustment groove; 103, hammer nut; 104, locking screw; 200, support block; 300, cylinder; 301, push rod; 302, cylinder base; 303, elongated hole; 401, first base plate; 402, cover plate; 500, protective cover; 501, connecting plate; 502, arc-shaped cover plate; 503, sleeve; 600, support; 700, second base plate; 800, plug pin; 801, arc surface; 900, toothed palm; 901, journal; 902, steel ball locking groove; 903, plug pin hole. Detailed Implementation

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] It should be noted that in this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0024] Example 1

[0025] like Figure 1 As shown, this embodiment includes a bearing clamp 100, a support block 200, and a cylinder 300.

[0026] like Figure 1 and Figure 3 As shown, the bearing clamp 100 is a thin block structure with a thickness that matches the journal 901 of the toothed palm 900 (not exceeding the journal length), and can form a sufficient contact surface with the journal 901 without obstructing the steel ball locking groove 902.

[0027] The bearing clamp 100 is provided with a journal through hole 101 and a mounting adjustment groove 102;

[0028] The journal through hole 101 is formed along the thickness direction of the bearing clamp; preferably, the axis of the journal through hole 101 is horizontal.

[0029] The mounting adjustment groove 102 is a through groove that communicates with the journal through hole 101 and forms a lateral opening on the bearing clamp 100 to facilitate the insertion of the journal 901 of the toothed bearing into the journal through hole 101. The bearing clamp 100 has a hammer nut 103 at the lower part of the mounting adjustment groove 102 and a corresponding locking screw 104 at the upper part of the mounting adjustment groove 102. When the locking screw 104 is tightened with the hammer nut 103, it can lock the journal 901 of the toothed bearing 900 into the journal through hole 101. When locking the toothed bearing 900, the steel ball locking groove 902 on the journal 901 must be fully exposed. The journal through hole 101 and the journal 901 are tightly fitted. The mounting adjustment groove 102 improves the convenience of installing the journal 901 and the reliability of locking.

[0030] When dealing with different types of toothed bearings, simply select a bearing clamp with a corresponding journal through hole. The operation is convenient and quick, and it has good locking stability.

[0031] The support block 200 preferably adopts a T-shaped structure. The T-shaped support block 200 forms two upper support grooves and two lower support grooves through a vertical structure and two horizontal structures. One of the two upper support grooves carries a bearing clamp 100. The bearing clamp 100 is fixed to the vertical structure of the support block 200 by fasteners. The fasteners are preferably internal hex screws.

[0032] like Figure 1 and Figure 4 As shown, the cylinder 300 has a push rod 301 at the power output end. The push rod 301 can extend into the plug hole 903 of the toothed palm 900 to press the rear end of the plug pin 800. The front end of the plug pin 800 abuts against the wall of the front part of the plug hole 903. The push rod 301 and the wall of the front part of the plug hole 903 press the plug pin 800 into the plug hole 903 to prevent the plug pin from loosening during the grinding process. The front end of the plug pin 800 can be ground to form an arc surface 801 that matches the steel ball locking groove 902, ensuring that the steel ball can roll smoothly in the steel ball locking groove 902.

[0033] like Figure 1As shown, the cylinder 300 is slidably mounted on the cylinder base 302. Preferably, the cylinder base 302 has several elongated holes 303, and the cylinder 300 is fixed to the cylinder base 302 by fasteners passing through the elongated holes 303. Based on this structure, the cylinder position is adjustable, which can adapt to the position of the plug pin hole of different types of toothed jaws, greatly improving the flexibility and applicability of the fixture.

[0034] like Figure 1 and Figure 2 As shown, preferably, corresponding to the aforementioned clamp, this embodiment also includes a protective cover 500, a sleeve 503, and a support 600. The support 600 is fixed on the second base plate 700 to form a stable support structure; the sleeve 503 is sleeved on the support 600, and the protective cover 500 is welded and fixed to the sleeve 503.

[0035] Preferably, the protective cover 500 has an open structure and a rotatable design, which facilitates the repair of the plug pin and prevents metal shavings generated during the grinding of the plug pin. The sleeve 503 can be locked to the support 600 by screws. When adjusting the angle of the grinding operation, the locking state of the sleeve 503 and the support 600 can be released by adjusting the screws, so that the protective cover 500 can be rotated to the desired angle, and then the screws can be adjusted to lock the two together.

[0036] The open-structure cover 500 includes a connecting plate 501 and an arc-shaped cover plate 502, which are open on the sides and top. The arc-shaped cover plate 502 is made of sheet metal with a thickness of 3mm and is semi-circular. The arc-shaped cover plate 502 is welded and fixed to the connecting plate 501, and the connecting plate 501 is welded and fixed to the sleeve 503.

[0037] In addition, for the protective cover 500, this embodiment also provides a first base plate 401 and a cover plate 402. The support block 200 is fixed to the first base plate 401 by fasteners, the first base plate 401 is fixed to the cover plate 402 by screws, and the cover plate 402 is fixed to the top of the support 600 by screws. Preferably, the top surface of the connecting plate 501 on the protective cover 500 abuts against the bottom surface of the cover plate 402 to ensure the height of protection.

[0038] Preferably, for the support block 200, fasteners are provided at its two lower support grooves, and the support block 200 is fixed on the first base plate 401 by the fasteners; the fasteners are preferably internal hex screws.

[0039] To simplify the overall structure of the fixture, in this embodiment, the first base plate 401 is also used as a support for the cylinder base 302. Specifically, because the toothed part in the clamping and grinding state needs to keep its journal axis in a horizontal state (the axis of the journal through hole is set horizontally), the plug hole is at a certain angle relative to the horizontal plane. Therefore, one side of the first base plate 401 is set as an inclined surface, and the tilt angle of the cylinder base 302 is the same as the tilt angle of this inclined surface. Then, the cylinder base is fixed to this inclined surface of the first base plate 401 by fasteners.

[0040] In this embodiment, the toothed palm 900 with all steel balls installed is obtained, the journal 901 of the toothed palm is inserted into the journal through hole 101, and then the toothed palm 900 is locked by fastening the locking screw 104 and the hammer nut 103; then the plug pin 800 is placed in the plug pin hole 903, and the cylinder 300 drives the push rod 301 to tighten the plug pin 800; then, according to the direction of the grinding operation, the shielding direction of the protective cover 500 is adjusted by the sleeve 503, and finally the sleeve 503 is locked, and the grinding of the top arc surface 801 of the plug pin begins.

[0041] It should be emphasized that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A clamp for repairing molar insert pins, characterized in that, Includes a cylinder, a support block, and a bearing clamp fixed on the support block; The bearing clamp is provided with a journal through hole for fixing the journal of the toothed palm; The cylinder is equipped with a push rod at the power output end. The push rod is used to extend into the plug pin hole and push the plug pin at the end away from the steel ball locking groove, so as to cooperate with the wall of the plug pin hole to tighten the plug pin.

2. The clamp for repairing the palm insert pin of a grinding tooth according to claim 1, characterized in that, The cylinder is slidably mounted on the cylinder base.

3. The clamp for repairing the palm insert pin of a grinding tooth according to claim 2, characterized in that, The cylinder base is provided with several elongated holes, and the cylinder is fixed to the cylinder base by fasteners passing through the elongated holes.

4. The clamp for repairing the palm insert pin of a molar according to claim 1, characterized in that, The bearing clamp is also provided with an installation adjustment groove, which is connected to the journal through hole and forms a lateral opening on the bearing clamp; the bearing clamp is provided with a hammer nut at the lower part of the installation adjustment groove and a corresponding locking screw at the upper part of the installation adjustment groove. When the locking screw and the hammer nut are tightened together, the journal of the toothed bearing can be locked in the journal through hole.

5. The clamp for repairing the palm insert pin of a grinding tooth according to claim 1, characterized in that, The fixture is provided with a support, a protective cover and a sleeve. The protective cover is welded and fixed to the sleeve, the sleeve is fitted on the support, and the support block is fixed to the top of the support.

6. The clamp for repairing the palm insert pin of a grinding tooth according to claim 5, characterized in that, The support block is fixed to the first base plate by fasteners, the first base plate is fixed to the cover plate by fasteners, and the cover plate is fixed to the top of the support by fasteners.

7. The clamp for repairing the palm insert pin of a grinding tooth according to claim 6, characterized in that, The first base plate has an inclined surface, and the cylinder base is inclined and locked to the inclined surface of the first base plate by fasteners.

8. The clamp for repairing the palm insert pin of a molar according to claim 6, characterized in that, The protective cover has an open structure, and the sleeve is rotatably fitted onto the support and can be locked to the support by fasteners.

9. The clamp for repairing the palm insert pin of a molar according to claim 8, characterized in that, The protective cover includes a connecting plate and an arc-shaped cover plate, forming a protective cover structure with open sides and top.

10. The clamp for repairing the palm insert pin of a molar according to claim 9, characterized in that, The top surface of the connecting plate on the protective cover abuts against the bottom surface of the cover plate.

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