Key groove clamping driving tool for machine tool

Abstract

The utility model provides a key groove clamping driving tool for a machine tool, belongs to the field of machine tool auxiliary accessories, and solves the problems that an existing driving tool is single in structure, small in application range and the like. The key groove clamping driving tool for the machine tool comprises a basic part, a buckling part and a limiting part are arranged on the front side of the basic part, four rotating position adjusting rods which are evenly distributed in the circumferential direction are hinged to the limiting part, the rotating position adjusting rods are clamped on the buckling part when stored, and four fastening screws which are evenly distributed in the circumferential direction are connected to the limiting part in a threaded mode. The set screw adjustably abuts against the turned-out rotating position adjusting rod, and a limiting clamping plate is detachably arranged at the end of the rotating position adjusting rod. The foldable elastic buckle design is adopted, one-key containing and releasing of the rotating position adjusting rod are achieved, the size is reduced, the switching time is short, and the storage and operation efficiency is improved; the strength is high, the bearing capacity is high, and the workpiece machining yield is increased; and the use cost is remarkably reduced through the replaceable limiting clamping plate and the ultra-durable assembly which are modularly designed, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model belongs to machine tool auxiliary accessory technical field relates to a machine tool clamping tool, in particular to a keyway clamping driving tool for machine tool. BACKGROUND

[0002] The traditional driving tool cannot be folded, and occupies more than twice the area of the standard tool when the machine tool is changed or stored, resulting in insufficient utilization of the production line space of less than 50%, and frequent disassembly and transportation takes more than 5 minutes per time.

[0003] The fixed clamping structure only supports a single keyway angle (such as 90°, 120°), and custom tools are required for processing non-standard angle workpieces, with an average custom period of 7 days and a cost increase of 30%-200%.

[0004] The single-point driving structure is prone to workpiece slipping (scrap rate > 5%), and an angle deviation of 0.1°-0.5° is generated when the torque is > 80 Nm; the steel buckle is prone to fatigue fracture (service life < 12,000 times) due to repeated bending, and the corrosion of the cooling liquid aggravates the wear, with an average monthly downtime maintenance of 8 hours.

[0005] At the same time, the driving tool cannot be quickly switched, and cannot meet the needs of more workpiece processing, with a small application range.

[0006] Based on this / therefore, a keyway clamping driving tool for machine tool is proposed. UTILITY MODEL CONTENTS

[0007] The utility model aims at the above-mentioned problems existing in the prior art, and proposes a keyway clamping driving tool for machine tool, which solves the technical problems of how to realize the design of foldable elastic buckle, meet the one-key storage and release of the rotation position adjusting rod, reduce the volume, shorten the switching time, improve the storage and operation efficiency, and at the same time, have high strength, high carrying capacity, and high workpiece processing qualification rate; the replaceable limiting clamping plate and the super-durable component of the modular design significantly reduce the use cost, and have a wide application range.

[0008] The purpose of the utility model can be realized through the following technical schemes:

[0009] A keyway clamping driving tool for machine tool, comprising a base piece, a buckle piece and a limiting piece are arranged on the front side of the base piece, four circumferentially distributed rotation position adjusting rods are hinged to the limiting piece, the rotation position adjusting rods are clamped on the buckle piece when stored, four circumferentially distributed tight screws are screwed on the limiting piece, the tight screws adjustably abut on the rotation position adjusting rods after being turned out, and a limiting clamping plate is detachably arranged at the end of the rotation position adjusting rod.

[0010] The working principle of the utility model is as follows: base positioning and installation: the base piece is the installation base body of the whole tool, which is used for fixing to the machine tool;

[0011] Storage state: when the tool is not used or needs to be transported and stored, the four rotary position adjusting rods can be folded inward for storage;

[0012] In the storage state, the rotary position adjusting rod is fixed by the buckle piece to prevent it from swinging freely, protecting the adjusting rod and the limiting clamping plate thereon, while significantly reducing the overall profile size of the tool, facilitating storage and avoiding bumps.

[0013] Work preparation deployment and preliminary positioning: when the tool needs to be used, according to the specifications and positions of the keyways of the shaft to be machined by the machine tool, select the corresponding specification of the limiting clamping plate, install it at the end of the rotary position adjusting rod, release the rotary position adjusting rod from the buckle piece and turn it outwards to reach the working position;

[0014] Four all or corresponding position of a locking screw adjustably abuts on the turned out rotary position adjusting rod, locking the rotary position adjusting rod, at this time the limiting clamping plate clamps into the keyway of the shaft to be machined, and the shaft to be machined is stably positioned.

[0015] The base piece includes a base piece body, one end of the base piece body is provided with a connecting column, the other end of the base piece body is provided with a base mounting screw, and four circumferentially distributed avoidance slot areas are opened at the other end of the base piece body. When the rotary position adjusting rod is stored, the limiting clamping plate is clamped inside the avoidance slot area at the corresponding position.

[0016] With the above structure, the main body bears: the base piece body is the core structural component of the entire tool, all other components (buckle piece, limiting piece, rotary position adjusting rod, etc.) are directly or indirectly installed thereon, bearing the structure of the entire tool and transmitting the torque during machining; machine tool connection interface: the connecting column provides a standard or customized interface for quickly and accurately connecting the entire tool to the main shaft, dividing head or other driving devices of the machine tool. This is the main way for the tool to receive the rotary power of the machine tool; the base mounting screw is located at the other end of the base piece body, providing a fixing point for the buckle piece and the limiting piece; four circumferentially distributed avoidance slot areas: storage state space guarantee: when the rotary position adjusting rod is folded down for storage, the limiting clamping plate can be smoothly inserted into the avoidance slot area, achieving compact storage.

[0017] The buckle piece includes an internal screw hole block, which is cylindrical, and is detachably screwed onto the base mounting screw and abuts against the base piece body. The outer edge of the internal screw hole block is provided with four circumferentially distributed flexible clamping plates integrally formed thereon, the flexible clamping plates are C-shaped, both ends of the flexible clamping plates are provided with clamping protrusions integrally formed thereon, and the positions of the flexible clamping plates correspond to the positions of the avoidance slot areas.

[0018] With the above structure, the core of the buckle piece is the internal screw hole block, which is screwed onto the base mounting screw;

[0019] When tightened, the end face of the inner threaded hole block will tightly abut against the end face of the base body, thereby firmly fixing itself at a designated position of the base body and achieving axial positioning;

[0020] Flexible clamping structure: the outer edge of the inner threaded hole block is integrally connected with four circumferentially distributed flexible clamping plates; each flexible clamping plate is C-shaped, which gives it good elastic deformation capability; the positions of the flexible clamping plates accurately correspond to those of the four avoidance slot regions on the base body;

[0021] Storage and locking process: when the rotary position adjusting rod needs to be stored, the limiting clamping plate will fall into the corresponding avoidance slot region; when the rotary position adjusting rod is pressed to the storage position, its shaft or a specific part will press against the clamping protrusions at both ends of the flexible clamping plate;

[0022] The design of the clamping protrusions allows the rotary position adjusting rod to spread apart the C-shaped flexible clamping plate under pressure, causing elastic deformation; once the rotary position adjusting rod is fully in place, the elastic restoring force of the flexible clamping plate will drive the clamping protrusions to rebound and snap onto the corresponding structure of the rotary position adjusting rod, preventing it from popping up or loosening on its own;

[0023] Release process: when the rotary position adjusting rod needs to be used, the operator only needs to exert an upward pulling force on the rotary position adjusting rod; this force will overcome the elastic clamping force of the flexible clamping plate, forcing the clamping protrusions to open again; when the pulling force is sufficient, the rotary position adjusting rod can be pulled out of the clamping protrusions, and the limiting clamping plate will flip out of the avoidance slot region and enter the working state.

[0024] The clamping piece is made of high-elasticity polypropylene plastic through integral injection molding.

[0025] With the above structure, the high elasticity and excellent fatigue resistance of polypropylene plastic are utilized to reliably and durably achieve elastic clamping and release of the rotary position adjusting rod in the storage state.

[0026] The limiting piece includes a limiting piece body, the transverse section of the limiting piece body is spline-shaped, the inside of the limiting piece body is provided with an inner threaded hole column, the inner threaded hole column is detachably screwed on the base installation screw and abuts against the inner threaded hole block, four circumferentially distributed avoidance gaps are formed in the end of the limiting piece body, a rotating column is screwed in each avoidance gap, an adjusting rod placement hole and an abutting hole are formed in the end of the limiting piece body, the abutting hole is located inside the adjusting rod placement hole, the adjusting rod placement hole is located at the middle position of the four avoidance gaps, and the adjusting rod placement hole, the abutting hole, and the four avoidance gaps are in communication, four circumferentially distributed screw holes are formed in the end of the limiting piece body, the screw holes and the avoidance gaps are alternately arranged, and a stop screw is screwed in the inside of the screw hole at the corresponding position.

[0027] With the above structure, installation and axial positioning: the limiting piece body is screwed on the base installation screw through the inner threaded hole column inside it;

[0028] When tightened, the end face of the inner threaded hole column will tightly abut against the end face of the lower installed inner threaded hole block; this stacking installation mode (base piece body → buckle piece → limiting piece) ensures: accurate axial positioning: the limiting piece closely adheres to the buckle piece and the base piece body, eliminating axial gaps; overall rigidity is enhanced: the three are pressed tightly by the base installation screw, forming a stable whole;

[0029] Coaxiality guarantee: ensures that the rotation center of the limiting piece is consistent with the base piece; torque transmission: the cross section of the limiting piece body is spline-shaped; the spline structure provides extremely high torsional stiffness and precise circumferential positioning capability; when the base piece (through the connecting column) receives the machine torque rotation, the torque is transmitted to the spline structure of the limiting piece body through the base installation screw (or the mating surface of the base piece body and the limiting piece); the spline design ensures that the torque is efficiently, without slip, and without angular error, transmitted to the entire limiting piece;

[0030] Hinge and installation of the rotation and position adjustment rod: four circumferentially distributed avoidance gaps are opened at the end of the limiting piece body; the rotation column is screwed in the avoidance gap; hinge point: the rotation column serves as a hinge pin, and the rotation and position adjustment rod is hinged to the rotation column (i.e., there should be a corresponding hole on the rotation and position adjustment rod to accommodate the rotation column); this allows the rotation and position adjustment rod to rotate (adjust the angle) and flip (fold / unfold) around the axis of the rotation column;

[0031] Provide swing space: the avoidance gap provides the necessary swing space for the rotation and position adjustment rod when rotating to adjust the angle and flipping, to avoid interference with the limiting piece body;

[0032] Adjusting rod working space: adjusting rod placement hole: located in the middle position of the four avoidance gaps, it is a larger hole or slot; when the rotation and position adjustment rod is flipped upward to the unfolded working position, the rod portion (especially the root part near the hinge point) can be accommodated in the adjusting rod placement hole; this provides deeper and more stable accommodation space for the adjusting rod, ensuring that it has good support at the root when in the working state (under the driving torque), reducing the cantilever effect, and improving rigidity and stability; at the same time, it is connected with the avoidance gap, facilitating the flipping of the adjusting rod from the folded state;

[0033] Adjusting rod angle locking: four circumferentially distributed screw holes are alternately arranged with the avoidance gaps (i.e., located between adjacent two avoidance gaps);

[0034] Abutting hole: located inside the adjusting rod placement hole (closer to the center axis of the limiting piece), and connected with the adjusting rod placement hole and the avoidance gap;

[0035] Tightening screw: screwed into the corresponding position of the screw hole; locking process: the rotation adjusting rod is rotated (indexing) to the required working angle; the operator tightens the corresponding position of the tightening screw; the tip of the tightening screw passes through the screw hole and abuts against the hole; the screw tip directly and firmly abuts against the root side of the rotation adjusting rod (located in the adjusting rod hole); the huge friction generated by the screw (or possible slight deformation) firmly locks the rotation adjusting rod at the current angle position, preventing it from rotating when transmitting driving torque.

[0036] The rotation adjusting rod includes an adjusting rod body, a hinged connecting rod fixed at the outer edge end of the adjusting rod body, the hinged connecting rod being rotationally arranged on the corresponding position of the rotating column, the thickness of the hinged connecting rod being equal to the width of the avoidance gap, a limiting through hole being formed in the adjusting rod body, a sealing rubber ring being arranged inside the limiting through hole, the included angle between the axis of the limiting through hole and the hinged connecting rod being °, the axis of the limiting through hole being collinear with the axis of the screw hole when the rotation adjusting rod is turned out, an inner screw hole rod being fixed at the end of the adjusting rod body, a limiting clamping plate being detachably screwed at the end of the inner screw hole rod, the diameter of the adjusting rod body being equal to the hole diameter of the abutting hole, the adjusting rod body being clamped on the limiting member body and the inner screw hole rod being clamped inside the corresponding flexible clamping plate when the rotation adjusting rod is accommodated.

[0037] With the above structure, the hinged and turned motion: the rotation adjusting rod is connected with the limiting member through the hinged connecting rod; the hinged connecting rod is rotationally arranged on the rotating column (the rotating column serves as a pin shaft), so that the whole rotation adjusting rod can rotate (angle adjustment) and turn (accommodation / deployment) around the axis of the rotating column;

[0038] The thickness of the hinged connecting rod is equal to the width of the avoidance gap on the limiting member; it is ensured that the hinged connecting rod can smoothly and gaplessly shake when rotating during angle adjustment, improving the adjustment accuracy and working stability;

[0039] Angle adjustment: the operator holds the adjusting rod body, which can be rotated around the axis of the rotating column; the rotation angle range is limited by the surrounding structure (such as the adjacent adjusting rod or the limiting member body), and it is usually freely adjustable within a certain range;

[0040] Angle locking (working state): a limiting through hole is formed in the adjusting rod body; when the rotation adjusting rod is turned up and deployed to the working position and angle adjustment is performed, the axis of the limiting through hole is collinear with the axis of the corresponding screw hole on the limiting member;

[0041] The diameter of the adjusting rod body is equal to the hole diameter of the abutting hole on the limiting member; when the tightening screw is screwed in from the screw hole, the tip thereof will: pass through the abutting hole (the hole diameter is equal to the rod diameter, providing accurate guidance and support); directly and firmly abut against the inner wall of the limiting through hole; the huge friction generated by the tightening screw firmly locks the adjusting rod body at the current angle position, preventing it from rotating around the rotating column when transmitting driving torque;

[0042] Sealing rubber ring: located inside the limiting through hole; mainly plays the role of preventing dust and cooling liquid from entering, protecting the contact surface of the screw and the hole wall, reducing wear and corrosion, and possibly providing slight damping or uniform contact pressure; not the main bearing locking force;

[0043] Limiting clamping plate installation: the end of the adjusting rod body is fixed with an internal threaded rod; the limiting clamping plate is detachably screwed on the end of the internal threaded rod through the self-provided screw rod; a modular interface is provided, which facilitates quick replacement of different specifications of limiting clamping plates according to the size or shape of the workpiece keyway, or replacement after wear;

[0044] Storage state: storage action: the rotary adjusting rod is folded and turned down (or inward) around the rotating column; positioning and clamping: the adjusting rod body is clamped on the limiting member body: the rod body of the adjusting rod body will fall into the adjusting rod hole of the limiting member, and its diameter is equal to the contact hole, which may help to preliminarily position in the hole;

[0045] The internal threaded rod is clamped inside the flexible clamping plate: as the adjusting rod is completely folded in place, the internal threaded rod will be pressed between the clamping protrusions at both ends of the corresponding flexible clamping plate of the clamping member;

[0046] The elasticity of the flexible clamping plate causes the clamping protrusions to clamp the internal threaded rod (the rod diameter matches the spacing between the clamping protrusions), firmly locking the rotary adjusting rod in the storage position;

[0047] The adjusting rod body located in the adjusting rod hole also provides additional positioning and support.

[0048] Compared with the prior art, the keyway clamping driving tool for machine tools has the following advantages:

[0049] The foldable elastic clamping system realizes one-key storage and release of the rotary adjusting rod through the high-elasticity polypropylene clamping member, reduces the storage volume, shortens the state switching time, and greatly improves the storage and operation efficiency.

[0050] The spline anti-torsion limiting member and the root rigid locking structure are adopted, the equal-diameter cooperation design of the contact hole and the adjusting rod body is utilized, and four-point synchronous driving is combined to ensure that the torque transmission has no angle deviation, the bearing capacity is high, and the workpiece machining qualification rate is improved.

[0051] The replaceable limiting clamping plate of modular design and the super-durable assembly significantly reduce the use cost, have wide application range: high fatigue life, reduced spare parts types, low maintenance cost, adapt to multi-specification keyway machining demand, and realize the three breakthroughs of precision, efficiency and economy. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is the structure schematic diagram of the utility model in storage.

[0053] Figure 2 This is a schematic diagram of the structure of this utility model when it is flipped out.

[0054] Figure 3 This is a structural diagram of the present invention when the limiting locking plate is replaced.

[0055] Figure 4 This is a three-dimensional structural diagram of some components in this utility model.

[0056] Figure 5 This is a cross-sectional structural diagram of some components in this utility model.

[0057] Figure 6 This is a schematic diagram of the limiting locking plate and the rotating adjustment rod in this utility model.

[0058] In the diagram, 1. Base component; 2. Buckle component; 3. Rotation adjustment rod; 4. Limiting component; 5. Limiting locking plate; 6. Set screw; 7. Base component body; 8. Clearance groove area; 9. Connecting column; 10. Locking protrusion; 11. Flexible locking plate; 12. Limiting component body; 13. Clearance gap; 14. Screw hole; 15. Rotating column; 16. Adjusting rod placement hole; 17. Clamping hole; 18. Internally threaded hole column; 19. Base mounting screw; 20. Internally threaded hole block; 21. Hinge connecting rod; 22. Adjusting rod body; 23. Limiting through hole; 24. Internally threaded hole rod. Detailed Implementation

[0059] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0060] like Figures 1-6 As shown, the machine tool uses a keyway engagement drive fixture, which includes a base component 1. The front side of the base component 1 is provided with a buckle component 2 and a limiting component 4. Four circumferentially distributed rotation adjustment rods 3 are hinged on the limiting component 4. When the rotation adjustment rods 3 are retracted, they are engaged with the buckle component 2. Four circumferentially distributed set screws 6 are screwed onto the limiting component 4. The set screws 6 are adjustable and abut against the rotate adjustment rods 3 after they are flipped out. The end of the rotate adjustment rod 3 is detachably provided with a limiting engagement plate 5.

[0061] Basic positioning and installation: Base component 1 is the mounting base of the entire tooling, used to fix it to the machine tool;

[0062] Storage state: When the tooling is not in use or needs to be transported or stored, the four rotary adjustment rods 3 can be folded inward for storage;

[0063] In the stored state, the rotating adjustment rod 3 is fixed by the buckle 2 to prevent it from swinging freely, protecting the adjustment rod and the limiting locking plate 5 on it, while significantly reducing the overall outline size of the tooling, making it easier to store and avoid bumps.

[0064] Work preparation deployment and preliminary positioning: when the tool is needed, according to the specification and position of the keyway of the shaft to be machined by the machine tool, select the corresponding specification of the limiting clamping plate 5, install it at the end of the rotary position adjusting rod 3, release the rotary position adjusting rod 3 from the buckle 2 and turn it outwards to reach the working position;

[0065] Four all or corresponding position of a locking screw 6 adjustably abuts on the turned out rotary position adjusting rod 3, locks the rotary position adjusting rod 3, and at this time the limiting clamping plate 5 is clamped and embedded in the keyway of the shaft to be machined, and the shaft to be machined is stably positioned.

[0066] The base piece 1 includes a base piece body 7, one end of the base piece body 7 is provided with a connecting column 9, the other end of the base piece body 7 is provided with a base installation screw 19, and four circumferentially distributed avoidance groove areas 8 are opened at the other end of the base piece body 7. When the rotary position adjusting rod 3 is received, the limiting clamping plate 5 is clamped inside the corresponding position of the avoidance groove area 8.

[0067] Main body bearing: the base piece body 7 is the core structural part of the whole tool, all other parts (buckle 2, limiting piece 4, rotary position adjusting rod 3, etc.) are directly or indirectly installed on it, bearing the structure of the whole tool and transmitting the torque during machining; Machine tool connection interface: the connecting column 9 provides a standard or customized interface for quickly and accurately connecting the whole tool to the spindle, dividing head or other driving devices of the machine tool. This is the main way for the tool to receive the rotary power of the machine tool; The base installation screw 19 is located at the other end of the base piece body 7, providing a fixed point for the buckle 2 and the limiting piece 4; Four circumferentially distributed avoidance groove areas 8: storage state space guarantee: when the rotary position adjusting rod 3 is folded down for storage, the limiting clamping plate 5 can be smoothly embedded in the avoidance groove area 8, realizing compact storage.

[0068] The buckle 2 includes an internal screw hole block 20, which is cylindrical, and the internal screw hole block 20 is detachably screwed on the base installation screw 19 and abuts on the base piece body 7. The outer edge of the internal screw hole block 20 is provided with four circumferentially distributed flexible clamping plates 11 which are integrally formed with the internal screw hole block 20. The flexible clamping plate 11 is C-shaped, and the two ends of the flexible clamping plate 11 are provided with clamping protrusions 10 which are integrally formed with the flexible clamping plate 11, and the position of the flexible clamping plate 11 corresponds to the position of the avoidance groove area 8.

[0069] The core of the buckle 2 is the internal screw hole block 20, which is screwed on the base installation screw 19 through the internal screw hole;

[0070] When tightened, the end face of the internal screw hole block 20 will tightly abut on the end face of the base piece body 7, thereby firmly fixing itself at the specified position (one end provided with the base installation screw 19 and the avoidance groove area 8) of the base piece body 7 and achieving axial positioning;

[0071] Flexible clamping structure: the outer edge of the inner threaded block 20 is integrally connected with four circumferentially distributed flexible clamping plates 11;

[0072] Each flexible clamping plate 11 is C-shaped, which gives it good elastic deformation capability;

[0073] The position of the flexible clamping plate 11 corresponds precisely to the position of the four avoidance slot areas 8 on the base body 7;

[0074] Storage and locking process: when the rotary position adjusting rod 3 needs to be stored, the limiting clamping plate 5 will fall into the corresponding avoidance slot area 8; when the rotary position adjusting rod 3 is pressed to the storage position, its rod body or specific part will press the clamping protrusions 10 at both ends of the flexible clamping plate 11;

[0075] The design of the clamping protrusions 10 allows the rotary position adjusting rod 3 to expand the C-shaped flexible clamping plate 11 under pressure, causing elastic deformation;

[0076] Once the rotary position adjusting rod 3 is fully in place, the elastic restoring force of the flexible clamping plate 11 will drive the clamping protrusions 10 to rebound and snap onto the corresponding structure of the rotary position adjusting rod 3, preventing it from popping up or loosening on its own;

[0077] Release process: when the rotary position adjusting rod 3 needs to be used, the operator only needs to apply an upward pulling force to the rotary position adjusting rod 3; this force will overcome the elastic clamping force of the flexible clamping plate 11, forcing the clamping protrusions 10 to open again (elastic deformation); when the pulling force is sufficient, the rotary position adjusting rod 3 can be pulled out of the clamping protrusions 10, and the limiting clamping plate 5 is flipped out of the avoidance slot area 8 and enters the working state.

[0078] The clamping part 2 is made of high-elasticity polypropylene plastic and is integrally injection molded.

[0079] The high elasticity and excellent fatigue resistance of polypropylene plastic can reliably and durably achieve the elastic clamping and release function of the rotary position adjusting rod in the storage state.

[0080] The limiting member 4 comprises a limiting member body 12, the transverse section of the limiting member body 12 is spline-shaped, the inside of the limiting member body 12 is provided with an internal screw hole column 18, the internal screw hole column 18 is detachably screwed on the base installation screw rod 19 and abuts on the internal screw hole block 20, the end of the limiting member body 12 is provided with four circumferentially distributed avoiding gaps 13, the avoiding gaps 13 are all screwed with rotating columns 15, the end of the limiting member body 12 is provided with an adjusting rod placing hole 16 and an abutting hole 17, the abutting hole 17 is located on the inner side of the adjusting rod placing hole 16, the adjusting rod placing hole 16 is located at the middle position of the four avoiding gaps 13, and the adjusting rod placing hole 16 and the abutting hole 17 are in communication with the four avoiding gaps 13, the end of the limiting member body 12 is provided with four circumferentially distributed screw holes 14, the screw holes 14 are alternately arranged with the avoiding gaps 13, and the tightening screw 6 is screwed in the corresponding position of the screw hole 14.

[0081] Installation and axial positioning: the limiting member body 12 is screwed on the base installation screw rod 19 through the internal screw hole column 18 in the inside of the limiting member body 12;

[0082] When being tightened, the end surface of the internal screw hole column 18 will abut on the end surface of the buckle member 2 (the internal screw hole block 20) which has been installed below; this stacked installation mode (the base member body 7→the buckle member 2→the limiting member 4) ensures that the axial positioning is accurate: the limiting member 4 is tightly attached to the buckle member 2 and the base member body 7, eliminating the axial gap; the overall rigidity is enhanced: the three are pressed tightly through the base installation screw rod 19, forming a stable whole;

[0083] Coaxiality guarantee: ensuring that the rotation center of the limiting member 4 is consistent with the base member 1 (the end of the connecting column 9);

[0084] Torque transmission: the transverse section of the limiting member body 12 is spline-shaped; the spline structure provides extremely high torsional stiffness and precise circumferential positioning capability; when the base member 1 (through the connecting column 9) receives the machine torque rotation, the torque is transmitted to the spline structure of the limiting member body 12 through the base installation screw rod 19 (or the matching surface of the base member body 7 and the limiting member 4); the spline design ensures that the torque can be efficiently, without slip and without angular error, transmitted to the entire limiting member 4;

[0085] Hinge connection and installation of the rotary adjusting rod: the end of the limiting member body 12 is provided with four circumferentially distributed avoiding gaps 13; the rotating columns 15 are screwed on the avoiding gaps 13; the hinge point: the rotating column 15 serves as a hinge pin, and the rotary adjusting rod 3 is hinged on the rotating column 15 (that is, there should be a corresponding hole on the rotary adjusting rod 3 to be sleeved on the rotating column 15); this allows the rotary adjusting rod 3 to rotate (adjust the angle) and flip (store / expand) around the axis of the rotating column 15;

[0086] Provide swing space: the avoidance gap 13 provides the necessary swing space for the rotary adjustment rod 3 when rotating the adjustment angle and turning, avoiding interference with the limiting part body 12;

[0087] Adjusting rod working space: adjusting rod hole 16: located in the middle position of the four avoidance gaps 13, it is a larger hole or groove; when the rotary adjustment rod 3 is turned up and unfolded to the working position, the rod part (especially the root part near the hinge point) can be accommodated in the adjusting rod hole 16; this provides deeper and more stable accommodation space for the adjusting rod, ensuring that the root part has good support when it is in the working state (under the driving torque), reducing the cantilever effect, improving rigidity and stability; at the same time, it is connected with the avoidance gap 13, which facilitates the turning out of the adjusting rod from the storage state;

[0088] Adjusting rod angle locking: four circumferentially distributed screw holes 14 are alternately arranged with the avoidance gap 13 (i.e. located between adjacent two avoidance gaps 13);

[0089] Resistant hole 17: located on the inner side of the adjusting rod hole 16 (closer to the center axis of the limiting part), and connected with the adjusting rod hole 16 and the avoidance gap 13;

[0090] Tightening screw 6: screwed into the corresponding position of the screw hole 14; locking process: the rotary adjustment rod 3 is rotated (shifted) to the required working angle; the operator tightens the corresponding position of the tightening screw 6; the tip of the tightening screw 6 penetrates through the screw hole 14 and the resistant hole 17; the screw tip directly and firmly abuts against the root side of the rotary adjustment rod 3 (located in the adjusting rod hole 16); the huge friction force (or possible slight deformation) generated by the screw firmly locks the rotary adjustment rod 3 at the current angle position, preventing it from rotating when transmitting the driving torque.

[0091] The rotary adjustment rod 3 comprises an adjusting rod body 22, the outer edge end of the adjusting rod body 22 is fixed with a hinged connecting rod 21, the hinged connecting rod 21 is rotationally arranged on the corresponding position of the rotating column 15, the thickness of the hinged connecting rod 21 is equal to the width of the avoidance gap 13, a limiting through hole 23 is formed in the adjusting rod body 22, a sealing rubber ring is arranged in the limiting through hole 23, the included angle between the axis of the limiting through hole 23 and the hinged connecting rod 21 is 45°, when the rotary adjustment rod 3 is turned out, the axis of the limiting through hole 23 is collinear with the axis of the screw hole 14, the end of the adjusting rod body 22 is fixed with an internal screw hole rod 24, the limiting clamping plate 5 is detachably screwed at the end of the internal screw hole rod 24, the diameter of the adjusting rod body 22 is equal to the hole diameter of the resistant hole 17, when the rotary adjustment rod 3 is stored, the adjusting rod body 22 is clamped on the limiting part body 12 and the internal screw hole rod 24 is clamped in the corresponding position of the flexible clamping plate 11.

[0092] Hinge and flip motion: the rotary position adjusting rod 3 is connected with the limiting member 4 through the hinge connecting rod 21; the hinge connecting rod 21 is rotatably sleeved on the rotating column 15 (the rotating column 15 acts as a pin shaft), so that the whole rotary position adjusting rod 3 can rotate (angle adjustment) and flip (folding / unfolding) around the axis of the rotating column 15;

[0093] The thickness of the hinge connecting rod 21 is equal to the width of the avoiding gap 13 on the limiting member 4; it ensures that the hinge connecting rod 21 can rotate smoothly and without gap in the avoiding gap 13 when the rotary position adjusting rod 3 is adjusted in rotation angle, improving the adjustment accuracy and working stability;

[0094] Angle adjustment: the operator holds the adjusting rod body 22 and can rotate it around the axis of the rotating column 15; the rotation angle range is limited by the surrounding structure (such as the adjacent adjusting rod or the limiting member body), and it can be freely adjusted within a certain range in general;

[0095] Angle locking (working state): a limiting through hole 23 is formed in the adjusting rod body 22; when the rotary position adjusting rod 3 is flipped and unfolded to the working position and is adjusted in angle, the axis of the limiting through hole 23 is collinear with the axis of the corresponding screw hole 14 on the limiting member 4;

[0096] The diameter of the adjusting rod body 22 is equal to the hole diameter of the abutting hole 17 on the limiting member 4; when the set screw 6 is screwed into the screw hole 14, the tip of the set screw 6 will: pass through the abutting hole 17 (the hole diameter is equal to the rod diameter, providing accurate guidance and support); directly and firmly abut against the inner wall of the limiting through hole 23; the huge friction force generated by the set screw 6 will lock the adjusting rod body 22 firmly in the current angle position, preventing it from rotating around the rotating column 15 when transmitting the driving torque;

[0097] Sealing rubber ring: located inside the limiting through hole 23; mainly plays the role of dustproof and preventing cooling liquid from entering, protects the contact surface of the screw and the hole wall, reduces wear and corrosion, and may also provide slight damping or uniform contact pressure; it is not the main bearing locking force;

[0098] Limiting clamping plate 5 installation: the end of the adjusting rod body 22 is fixed with an internal threaded hole rod 24; the limiting clamping plate 5 is detachably screwed on the end of the internal threaded hole rod 24 through the self-provided screw rod; it provides a modular interface, which facilitates quick replacement of different specifications of limiting clamping plates 5 according to the size or shape of the workpiece keyway, or replacement after wear;

[0099] Folding state (key): folding action: the rotary position adjusting rod 3 is folded and folded downward (or inward) around the rotating column 15;

[0100] Positioning and clamping: the adjusting rod body 22 is clamped on the limiting member body 12: the rod body of the adjusting rod body 22 will fall into the adjusting rod placing hole 16 of the limiting member 4, and its diameter is equal to that of the abutting hole 17, which may help to preliminarily position it in the hole;

[0101] The inner threaded hole rod 24 is clamped inside the flexible clamping plate 11: as the adjusting rod is fully folded into place, the inner threaded hole rod 24 will be pressed between the clamping protrusions 10 at both ends of the corresponding flexible clamping plate 11 of the buckle 2;

[0102] The elasticity of the flexible clamping plate 11 causes the clamping protrusions 10 to clamp the inner threaded hole rod 24 (the diameter of the inner threaded hole rod 24 matches the spacing between the clamping protrusions), firmly locking the rotary position adjusting rod 3 in the storage position;

[0103] The adjusting rod body 22 located in the adjusting rod placement hole 16 also provides additional positioning and support.

[0104] Working principle of the utility model:

[0105] I. Installation process

[0106] The base body 7 is fixed to the machine tool spindle / drive device through the connecting column 9;

[0107] The other end of the base is fixed to the machine tool workbench / support through the base installation screw rod 19;

[0108] The inner threaded hole block 20 is screwed onto the base installation screw rod 19, and is tightened so that its end surface abuts against the end surface of the base body 7;

[0109] Ensure that the clamping protrusions 10 of the flexible clamping plate 11 are aligned with the position of the base avoiding groove area 8;

[0110] The limiting piece inner threaded hole column 18 is screwed onto the base installation screw rod 19, and is tightened so that it abuts against the end surface of the inner threaded hole block 20;

[0111] The rotating column 15 is screwed onto the avoiding gap 13, serving as the hinge point of the rotary position adjusting rod;

[0112] The hinge connecting rod 21 is sleeved into the rotating column 15, ensuring that the thickness matches the width of the avoiding gap 13;

[0113] The limiting clamping plate 5 is screwed to the inner threaded hole rod 24 at the end of the rotary position adjusting rod.

[0114] II. Storage state operation process

[0115] Fold the rotary position adjusting rod: turn the rotary position adjusting rod 3 inward, so that the adjusting rod body 22 falls into the limiting piece adjusting rod placement hole 16; the inner threaded hole rod 24 is embedded in the corresponding avoiding groove area 8;

[0116] Lock the storage state: press the rotary position adjusting rod, so that the inner threaded hole rod 24 spreads the clamping protrusions 10 of the flexible clamping plate 11; the clamping protrusions 10 elastically clamp the inner threaded hole rod 24, fixing the adjusting rod; effect: minimizes the size of the tooling, protecting the components from collision.

[0117] III. Working state operation flow

[0118] Release the rotary position adjusting rod: pull the rotary position adjusting rod 3 upwards to make the elastic deformation of the clamping protrusion 10 release the inner threaded hole rod 24; turn the rotary position adjusting rod outward to the working position;

[0119] Adjust the angle and lock: rotate the rotary position adjusting rod 3 to make the limit clamping plate 5 match the workpiece key groove angle;

[0120] Locking mechanism: the axis of the limit through hole 23 is collinear with the threaded hole 14;

[0121] Tighten the fixing screw 6, the tip of which penetrates the abutting hole 17 and enters the inner wall of the limit through hole 23 (the diameters are equal to ensure rigid abutment);

[0122] The sealing rubber ring prevents dust and enhances friction;

[0123] Drive the workpiece: the limit clamping plate 5 is embedded in the workpiece key groove;

[0124] Machine tool torque transmission path: base piece (spline anti-torsion) → limit piece → locked rotary position adjusting rod → limit clamping plate → workpiece.

[0125] In summary, the foldable elastic buckle system is adopted, the one-key storage and release of the rotary position adjusting rod 3 is realized through the high-elasticity polypropylene buckle piece 2, the storage volume is reduced, the state switching time is short, and the storage and operation efficiency is greatly improved.

[0126] The spline anti-torsion limit piece 4 and the root rigid locking structure are adopted, the equal-diameter matching design of the abutting hole 17 and the adjusting rod body 22 is utilized, and the four-point synchronous drive is combined to ensure that the torque transmission has no angle deviation, the carrying capacity is high, and the workpiece processing qualification rate is improved.

[0127] The replaceable limit clamping plate 5 of the modular design and the super-durable assembly significantly reduce the use cost, and are widely applicable: high fatigue life, reduced spare part types, low maintenance cost, adaptation to multi-specification key groove processing demand, realization of the triple breakthrough of precision, efficiency and economy.

[0128] The specific embodiments described in the present document are only illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A key groove engagement driving tool for machine tools, comprising a base member (1), characterized in that, The front side of the base piece (1) is provided with a buckle piece (2) and a limiting piece (4), four circumferentially distributed rotary position adjusting rods (3) are hinged on the limiting piece (4), the rotary position adjusting rods (3) are clamped on the buckle piece (2) when being stored, four circumferentially distributed binding screws (6) are screwed on the limiting piece (4), the binding screws (6) adjustably abut on the rotary position adjusting rods (3) after being turned over, and the end of the rotary position adjusting rod (3) is detachably provided with a limiting clamping plate (5).

2. The key groove engagement driving tool for machine tools according to claim 1, characterized by The base piece (1) comprises a base piece body (7), one end of the base piece body (7) is provided with a connecting column (9), the other end of the base piece body (7) is provided with a base installation screw rod (19), and four circumferentially distributed avoiding groove areas (8) are formed in the other end of the base piece body (7), when the rotary position adjusting rods (3) are stored, the limiting clamping plates (5) are clamped in the avoiding groove areas (8) at the corresponding positions.

3. The key groove engagement driving tool for machine tools according to claim 2, characterized by The buckle piece (2) comprises an internal screw hole block (20), the internal screw hole block (20) is in a cylindrical shape, the internal screw hole block (20) is detachably screwed on the base installation screw rod (19) and abuts on the base piece body (7), the outer edge of the internal screw hole block (20) is provided with four circumferentially distributed flexible clamping plates (11) integrally formed thereon, the flexible clamping plates (11) are in a C shape, both ends of the flexible clamping plates (11) are provided with clamping protrusions (10) integrally formed thereon, and the positions of the flexible clamping plates (11) correspond to the positions of the avoiding groove areas (8).

4. The key groove engagement driving tool for machine tools according to claim 3, characterized by The buckle piece (2) is integrally injection molded by high-elastic polypropylene plastic.

5. The key groove engagement driving tool for machine tools according to claim 4, wherein The limiting piece (4) comprises a limiting piece body (12), the transverse section of the limiting piece body (12) is in a spline shape, the inside of the limiting piece body (12) is provided with an internal screw hole column (18), the internal screw hole column (18) is detachably screwed on the base installation screw rod (19) and abuts on the internal screw hole block (20), four circumferentially distributed avoiding gaps (13) are formed in the end of the limiting piece body (12), rotary columns (15) are screwed on the avoiding gaps (13), an adjusting rod placement hole (16) and an abutting hole (17) are formed in the end of the limiting piece body (12), the abutting hole (17) is located on the inner side of the adjusting rod placement hole (16), the adjusting rod placement hole (16) is located at the middle position of the four avoiding gaps (13), the adjusting rod placement hole (16) and the abutting hole (17) are in communication with the four avoiding gaps (13), four circumferentially distributed screw holes (14) are formed in the end of the limiting piece body (12), the screw holes (14) and the avoiding gaps (13) are alternately arranged, and the binding screws (6) are screwed in the screw holes (14) at the corresponding positions.

6. The key groove engagement driving tool for machine tools according to claim 5, wherein The rotating position adjusting rod (3) comprises an adjusting rod body (22), the outer edge end of the adjusting rod body (22) is fixed with a hinged connecting rod (21), the hinged connecting rod (21) is rotationally arranged on a rotating column (15) at a corresponding position, the thickness of the hinged connecting rod (21) is equal to the width of the avoiding gap (13), a limiting through hole (23) is formed in the adjusting rod body (22), a sealing rubber ring is arranged in the limiting through hole (23), the included angle between the axis of the limiting through hole (23) and the hinged connecting rod (21) is (45) °, when the rotating position adjusting rod (3) is turned out, the axis of the limiting through hole (23) is collinear with the axis of the screw hole (14), the end of the adjusting rod body (22) is fixed with an internal screw hole rod (24), the limiting clamping plate (5) is detachably screwed at the end of the internal screw hole rod (24), the diameter of the adjusting rod body (22) is equal to the hole diameter of the abutting hole (17), when the rotating position adjusting rod (3) is accommodated, the adjusting rod body (22) is clamped on the limiting member body (12) and the internal screw hole rod (24) is clamped in the inside of the flexible clamping plate (11) at a corresponding position.

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