Mechanical linkage top

Abstract

The present invention relates to a mechanical linkage center, belonging to the technical field of tailstock or center in turning machine tools. It comprises a fixed seat body, one end of which is connected to a movable center that can slide along its axial direction, and a sliding cover body that can slide along its axial direction; a mounting hole is provided on the fixed seat body, and the movable center can be slidably connected to the mounting hole, and a through hole is provided on the sliding cover body, and the movable center passes through the through hole; a lever mechanism is also provided on the fixed seat body, one end of the lever mechanism acts on the annular groove on the movable center, and the other end acts on the inner end surface of the sliding cover body so that when the movable center is forced to slide toward the fixed seat body, the sliding cover body can be driven to slide in the opposite direction through the lever mechanism; a plurality of driving centers are provided on the outer end surface of the sliding cover body so as to act on the end surface of the part with the reverse sliding. The center has a simple structure, is stable and reliable to use, and can achieve the effects of self-balancing force for transmitting torque and centering, and reliable torque transmission and centering.

Description

Technical Field

[0001] The invention belongs to the technical field of a tailstock or a center in a turning machine tool, and particularly relates to a mechanical linkage center. Background Art

[0002] During the turning process, the traditional one-clamp-one-pushing method is often used to clamp the turned parts. This method is stable and reliable, but has the disadvantages of low clamping efficiency and the clamping position of the chuck affects the overall one-time machinability. There is also a double-pushing method with a heart-shaped clamp at the spindle end to transmit torque to the parts and prevent idling during machining. This method can process the entire outer surface of the parts at one time, but it is not stable enough and the use of a heart-shaped clamp also affects the clamping efficiency. To this end, the technicians conducted further research and design, and a power-transmitting top disclosed in CN107855546A appeared. The top can retract and compress the spring during the retraction process, and is also equipped with a fixed driving sprocket and transmission teeth to abut the end face of the part to transmit torque to the part. However, the centering effect is limited by simply compressing the spring until the end face of the part abuts against the transmission teeth on the fixed driving sprocket. There is also an end face driven top disclosed in CN204194824U, which contacts the end face of the part through the driving claw to transmit torque to the part and is in a floating form, but its structure is too complicated, and the driving claw is slidably connected to the seat body, and the driving claw needs to transmit torque, which will result in the disadvantages of poor stability of the driving claw and easy loosening that affects the use effect; the seat needs to be disassembled when the driving claw is replaced, which is inconvenient for maintenance. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a mechanical linkage center to avoid the problems of complex structure and insufficient stability of end-face driven centers, and to achieve self-balancing of torque transmission and centering forces, and reliable torque transmission and centering effects.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A mechanical linkage top point comprises a fixed seat body, one end of which is connected to a movable top point which can slide along its axial direction; the end of the fixed seat body is also buckled with a sliding cover body which can slide along its axial direction; the fixed seat body is provided with a mounting hole, the movable top point can be slidably connected to the mounting hole, the sliding cover body is provided with a through hole for the movable top point to pass through and the movable top point passes through the through hole; a lever mechanism is also provided on the end of the fixed seat body, one end of the lever mechanism acts on the annular groove on the movable top point, and the other end acts on the inner end surface of the sliding cover body toward the fixed seat body so that when the movable top point is forced to slide toward the fixed seat body, the sliding cover body can be driven to slide in the opposite direction through the lever mechanism; a plurality of driving top points are provided on the outer end surface of the sliding cover body so as to act on the end surface of the part with the reverse sliding.

[0006] Furthermore, all the driving vertices are evenly distributed with the movable vertices as the center.

[0007] Furthermore, a plug-in hole for plugging in the driving tip is opened on the sliding cover body and the driving tip is plugged into the corresponding plug-in hole. A fastening screw is provided on the lateral side of the plug-in hole to fasten the driving tip in the plug-in hole; the fastening screw is close to the bottom end of the plug-in hole.

[0008] Furthermore, the lever mechanism includes a lever, and an installation groove is provided on the end surface of the fixed seat body. The installation groove is provided along the radial direction of the mounting hole and passes through the single side wall of the mounting hole. The lever is rotatably connected to the installation groove through a rotating shaft, and the rotating shaft is perpendicular to the movable top; the inner end of the lever acts on the annular groove on the movable top, and the outer end of the lever acts on the inner end surface of the sliding cover body facing the fixed seat body.

[0009] Furthermore, the lever mechanisms are provided in several sets, all of which are evenly distributed around the movable top.

[0010] Furthermore, the outer edge of the inner end surface of the sliding cover body is provided with a circle of retaining edge extending toward the fixed seat body and corresponding to the outer shape of the fixed seat body in a socket connection form to buckle the end of the fixed seat body. The end surface of the fixed seat body is processed with a circle of sunken steps, and the inner end surface of the sliding cover body is provided with an annular boss corresponding to the sunken step, and the outer end of the lever acts on the inner end surface of the annular boss.

[0011] Furthermore, the sliding cover body is connected to a guide reset mechanism, which includes a guide shaft, which is parallel to the movable top and passes through the sliding cover body and the fixed seat body at the same time. A head with a large diameter is provided at one end of the guide shaft and the head is located on the outer end surface of the sliding cover body to limit the axial movement of the guide shaft in one direction; a countersunk deep hole is provided on the other end surface of the fixed seat body, which is coaxial with the guide shaft and has an inner diameter larger than the guide shaft, the free end of the guide shaft is located in the countersunk deep hole and is connected to a washer and a screw that limits the washer, and a spiral compression spring is compressed between the washer and the bottom surface of the countersunk deep hole for reset after reverse sliding, and the spiral compression spring is sleeved on the guide shaft.

[0012] Furthermore, the number of the guide and reset mechanisms is several sets, all of which are evenly distributed around the movable top.

[0013] Furthermore, the other end of the fixed seat body is connected to a flange connecting plate, which is connected to the fixed seat body by a number of circumferentially evenly distributed connecting screws. The flange connecting plate covers the countersunk deep hole to prevent dust. The outer edge of the flange connecting plate is provided with a number of circumferentially evenly distributed through holes for connection with the machine tool spindle.

[0014] Furthermore, a center hole is provided on the flange connection plate, and the center hole is connected to the mounting hole to prevent air blocking from affecting the sliding of the movable top.

[0015] The beneficial effects of the present invention are:

[0016] 1. The mechanical linkage top of the present invention has a simple structure and reliable operation. The driving top pins are fixed to the sliding cover body and are uniformly driven by the sliding cover body, which can ensure the stability of the use of the driving top pins and the transmission of torque. When the movable top pin is forced to slide toward the fixed seat body through the lever mechanism, the sliding cover body can be driven to slide in the opposite direction, and the driving top pin can be driven to move in the opposite direction to act on the end face of the part to be processed, so that the transmission torque and the centering force are self-balanced between the centering and the driving, the torque transmission and the centering are very stable, and the use is simple and reliable.

[0017] 2. The mechanical linkage center of the present invention can be used for ordinary lathes, horizontal CNC lathes, vertical turning machining centers and other equipment. It can be connected to the spindle end of the equipment that is usually connected to the chuck. After the part is loaded, the part is pushed by the tailstock center (usually a hydraulic center) at the other end, and the subsequent mechanism action can be completed by contacting and continuing to push the movable center. After the part is processed and unloaded, the driving center and the movable center are automatically reset to prepare for the next clamping, which greatly improves the clamping efficiency, reduces labor intensity and saves costs.

[0018] 3. The driving top of the mechanical linkage top of the present invention is detachable, which is convenient for replacement and maintenance, and reduces the cost of use.

[0019] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of a mechanical linkage top of a specific embodiment;

[0022] Figure 2 It is a side view of the fixing seat body in a specific embodiment.

[0023] Reference numerals:

[0024] Flange connecting plate 1, fixed seat body 2, sliding cover body 3, guide shaft 4, movable top 5, lever 6, rotating shaft 7, driving top 8, fastening screw 9, connecting screw 10, spiral compression spring 11, washer 12, screw 13, annular groove 14, retaining edge 15, annular boss 16, countersunk deep hole 17, through hole 18, center hole 19, mounting hole 20, mounting groove 21, sinking step 22. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] See also Figure 1-2, is a mechanical linkage top, comprising a fixed seat body 2, one end of which is connected to a movable top 5 that can slide along its axial direction; the fixed seat body 2 is also buckled with a sliding cover body 3 that can slide along its axial direction; the fixed seat body 2 is provided with a mounting hole 20, the movable top 5 can be slidably connected to the mounting hole 20, the sliding cover body 3 is provided with a through hole 18 for the movable top 5 to pass through, and the top end of the movable top 5 passes through the through hole 18; the fixed seat body 2 is also provided with a lever mechanism, one end of which acts on the movable The top point 5 is in the annular groove 14 on the top point 5, and the other end acts on the inner end surface of the sliding cover body 3 along its axial direction toward the fixed seat body 2 so that when the movable top point 5 is forced to slide toward the fixed seat body 2, the sliding cover body 3 can be driven to slide in the opposite direction through the lever mechanism; a plurality of driving top points 8 are provided on the outer end surface of the sliding cover body 3 so as to act on the end surface of the part along with the reverse sliding. During implementation, the length of the driving top point 8 and the movable top point 5 protruding from the sliding cover body 3 should be combined with the stroke setting of the lever mechanism to complete the above-mentioned mechanism action; during implementation, both the fixed seat body 2 and the sliding cover body 3 use rotating parts for easy processing.

[0029] The mechanical linkage top of the embodiment has a simple structure and reliable operation. The driving top pins are all fixedly set on the sliding cover body 3 and are uniformly driven by the sliding cover body 3, which can ensure the stability of the use of the driving top pins and the transmission of torque. When the movable top pin 5 is forced to slide toward the fixed seat body 2 through the lever mechanism, the sliding cover body 3 can be driven to slide in the opposite direction, and the driving top pin 8 can be driven to move in the opposite direction to act on the end face of the part to be processed, so that the transmission torque and the centering force are self-balanced between centering and driving, and the torque transmission and centering are very stable, and the use is simple and reliable.

[0030] The mechanical linkage center of the embodiment can be used for ordinary lathes, horizontal CNC lathes, vertical turning machining centers and other equipment. It can be connected to the spindle end of the equipment that is usually connected to the chuck. After the part is loaded, the part is pushed by the tailstock center (usually a hydraulic center) at the other end, and the part contacts with the movable center 5 of the embodiment and continues to be pushed to complete the subsequent mechanism action; it greatly improves the clamping efficiency, reduces labor intensity, and saves costs.

[0031] Among them, a plug-in hole for plugging in the driving top 8 is opened on the sliding cover body 3, and the driving top 8 is plugged into the corresponding plug-in hole, and a fastening screw 9 is provided on the lateral side of the plug-in hole for fastening the driving top 8 in the plug-in hole; the fastening screw 9 is close to the bottom end of the plug-in hole, and when the sliding cover body 3 is a rotating part coaxial with the movable top 5, the fastening screw 9 is located in the radial direction of the movable top 5 and passes through the outer wall of the sliding cover body 3.

[0032] In this way, the driving top 8 is detachably connected, which is convenient for replacement and maintenance, and reduces the use cost.

[0033] Among them, the lever mechanism includes a lever 6, and a mounting groove 21 is opened on the end surface of the fixed seat body 2. The mounting groove 21 is opened along the radial direction of the mounting hole 20 and passes through the single side wall of the mounting hole 20. The lever 6 is rotatably connected to the mounting groove 21 through a rotating shaft 7, and the rotating shaft 7 is perpendicular to the movable top 5; the inner end of the lever 6 acts on the annular groove 14 on the movable top 5, and the outer end of the lever 6 acts on the inner end surface of the sliding cover body 3 facing the fixed seat body 2.

[0034] In this way, a feasible installation method of the lever mechanism is provided, and the connection is simple and reliable.

[0035] Among them, the outer edge of the inner end surface of the sliding cover body 3 is provided with a circle of retaining edge 15 extending toward the fixed seat body 2 and corresponding to the outer shape of the fixed seat body 2 in a socket connection form to buckle this end of the fixed seat body 2, and the end surface of the fixed seat body 2 is processed with a circle of sunken steps 22, and the inner end surface of the sliding cover body 3 is provided with an annular boss 16 corresponding to the sunken step 22, and the outer end of the lever 6 acts on the inner end surface of the annular boss 16.

[0036] In this way, the force transmission effect of the lever 6 is guaranteed, and the connection between the fixed seat body 2 and the sliding cover body 3 is more reasonable and the strength is better; the sinking step 22 makes room for the lever 6 to contact the sliding cover body 3, and the annular boss 16 is used to contact and bear force with the lever 6, without the need for intermediate transmission, thereby ensuring the force transmission effect of the lever 6 and making it reliable to use.

[0037] The sliding cover body 3 is connected to the guide reset mechanism, and the guide reset mechanism includes a guide shaft 4, which is parallel to the movable top 5 and passes through the sliding cover body 3 and the fixed seat body 2 at the same time. One end of the guide shaft 4 is provided with a head with a large diameter (larger than the diameter of the guide shaft 4) and the head is located on the outer end surface of the sliding cover body 3 to limit the axial movement of the guide shaft 4 in one direction; the other end surface of the fixed seat body 2 is provided with a countersunk deep hole 17, and the countersunk deep hole 17 is coaxial with the guide shaft 4 and has an inner diameter larger than the guide shaft 4. The free end of the guide shaft 4 is located in the countersunk deep hole 17 and is connected to a washer 12 and a screw 13 that limits the washer 12. The screw 13 and the washer 12 can be an integral structure. The screw 13 is coaxial with the guide shaft 4 and is threadedly connected to its end face. A spiral compression spring 11 is compressed between the washer 12 and the bottom surface of the countersunk deep hole 17 for resetting after reverse sliding. The spiral compression spring 11 is sleeved on the guide shaft 4. During implementation, a sink can be set on the outer end surface of the sliding cover body 3, and the head of the guide shaft 4 falls into the sink to avoid protrusion.

[0038] In this way, the centering and driving of the self-balancing mechanism are further guaranteed; each time the parts are processed and removed, under the spring force of the spiral compression spring 11, the sliding cover body 3 moves to the left and resets, and the lever 6 also drives the movable top 5 to reset, preparing for the centering and driving torque transmission of the next clamping.

[0039] The other end of the fixed seat body 2 is connected to the flange connection plate 1, which is connected to the fixed seat body 2 by a number of circumferentially evenly distributed connection screws 10. The flange connection plate 1 covers the countersunk deep hole 17 to prevent dust. The outer edge of the flange connection plate 1 is provided with a number of circumferentially evenly distributed through holes 18 for connection with the machine tool spindle. The flange connection plate 1 is provided with a center hole 19, which is connected to the mounting hole 20 to prevent air blocking from affecting the sliding of the movable center 5.

[0040] During implementation, in order to better ensure the use effect, all driving tips 8 are evenly distributed with the active tip 5 as the center; the number of the lever mechanisms is several sets, all of which are evenly distributed with the active tip 5 as the center; the number of the guide reset mechanisms is several sets, all of which are evenly distributed with the active tip 5 as the center. In the specific arrangement, three driving tips 8, three sets of lever mechanisms, three sets of guide reset mechanisms, and three connecting screws 10 can be selected. In terms of the circumferential direction, the driving tips 8, the lever mechanisms (lever 6) and the connecting screws 10 are located at the same circumferential position and are evenly distributed. The guide reset mechanism (guide shaft 4) is staggered with the above three units to ensure the flexibility of the mechanism action and the use effect.

[0041] During implementation, the fastening screw 9 adopts a standard hexagon socket flat-end set screw to avoid protrusion; the screw 13 and the connecting screw 10 adopt a standard hexagon socket cylindrical screw of corresponding specifications so as to be screwed by a tool.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A mechanical linkage top, comprising a fixed seat body, one end of which is connected to a movable top that can slide along its axis; characterized in that: The end of the fixed seat body is also buckled with a sliding cover body that can slide along its axial direction; the fixed seat body is provided with a mounting hole, the movable top can be slidably connected to the mounting hole, and the sliding cover body is provided with a through hole for the movable top to pass through, and the movable top passes through the through hole; a lever mechanism is also provided on the end of the fixed seat body, one end of the lever mechanism acts on the annular groove on the movable top, and the other end acts on the inner end surface of the sliding cover body toward the fixed seat body, so that when the movable top is forced to slide toward the fixed seat body, the sliding cover body can be driven to slide in the opposite direction through the lever mechanism; A plurality of driving tips are arranged on the outer end surface of the sliding cover so as to act on the end surface of the part along with the reverse sliding; The lever mechanism comprises a lever, the end surface of the fixed seat body is provided with a mounting groove, the mounting groove is provided along the radial direction of the mounting hole and penetrates a single side wall of the mounting hole, the lever is rotatably connected in the mounting groove through a rotating shaft, and the rotating shaft is perpendicular to the movable top; the inner end of the lever acts on the annular groove on the movable top, and the outer end of the lever acts on the inner end surface of the sliding cover body facing the fixed seat body; The sliding cover body is connected to a guide reset mechanism, which includes a guide shaft, which is parallel to the movable top and passes through the sliding cover body and the fixed seat body at the same time. A head with a large diameter is provided at one end of the guide shaft and the head is located on the outer end surface of the sliding cover body to limit the axial movement of the guide shaft in one direction; a countersunk deep hole is provided on the other end surface of the fixed seat body, and the countersunk deep hole is coaxial with the guide shaft and has an inner diameter larger than the guide shaft. The free end of the guide shaft is located in the countersunk deep hole and is connected with a washer and a screw that limits the washer. A spiral compression spring is compressed between the washer and the bottom surface of the countersunk deep hole for reset after reverse sliding, and the spiral compression spring is sleeved on the guide shaft.

2. The mechanical linkage top according to claim 1, characterized in that: All driving vertices are evenly distributed with the movable vertices as the center.

3. The mechanical linkage top according to claim 2, characterized in that: The sliding cover body is provided with a plug-in hole for plugging in the driving tip, and the driving tip is plugged into the corresponding plug-in hole. A fastening screw is provided on the lateral side of the plug-in hole for fastening the driving tip in the plug-in hole; the fastening screw is close to the bottom end of the plug-in hole.

4. The mechanical linkage top according to claim 1, characterized in that: The lever mechanisms are provided in several sets, all of which are evenly distributed around the movable top.

5. The mechanical linkage top according to claim 1, characterized in that: The outer edge of the inner end surface of the sliding cover body is provided with a circle of retaining edge extending toward the fixed seat body and corresponding to the shape of the fixed seat body in a socket connection form to buckle the end of the fixed seat body. The end surface of the fixed seat body is processed with a circle of sunken steps, and the inner end surface of the sliding cover body is provided with an annular boss corresponding to the sunken step, and the outer end of the lever acts on the inner end surface of the annular boss.

6. The mechanical linkage top according to claim 1, characterized in that: The number of the guide reset mechanisms is several sets, all of which are evenly distributed around the active top.

7. The mechanical linkage top according to claim 1, characterized in that: The other end of the fixed seat body is connected to a flange connecting plate, which is connected to the fixed seat body by a number of circumferentially evenly distributed connecting screws. The flange connecting plate covers the countersunk deep hole to prevent dust. The outer edge of the flange connecting plate is provided with a number of circumferentially evenly distributed through holes for connection with the machine tool spindle.

8. The mechanical linkage top according to claim 7, characterized in that: A center hole is provided on the flange connection plate, and the center hole is connected with the mounting hole to prevent air blocking from affecting the sliding of the movable top.

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