Clamping mechanism

Abstract

The utility model provides a clamping mechanism, and relates to the technical field of tool clamps, the clamping mechanism comprises a chuck assembly and an opening and closing driving mechanism, and the chuck assembly comprises a fixed chuck, a movable chuck, a movable sleeve and a spring sleeve. One end of the fixed chuck is a semi-cylindrical first clamping end, the horizontal side surface of the first clamping end is a clamping surface, and a first mounting groove is formed in the clamping surface; one end of the movable clamping head is hinged into the first mounting groove through a hinge shaft, the other end of the movable clamping head is a flat second clamping end, and the second clamping end is used for being matched with the clamping face to clamp the part framework. The fixed chuck is sleeved with the movable sleeve, and a second mounting groove is formed in the end, facing the clamping face, of the movable sleeve; the middle of the movable chuck is bent upwards and provided with a connecting hole, and a pin shaft penetrating through the connecting hole is installed in the second installation groove. The spring sleeve is mounted between the other end of the fixed chuck and the movable sleeve; the opening and closing driving mechanism is used for driving the movable sleeve to move along the axis.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a clamping mechanism. Background Technology

[0002] Existing winding equipment typically requires a clamping mechanism to hold the part to be wound, and then drives the clamping mechanism to rotate the part to complete the winding. The clamping mechanism needs to be designed according to the skeleton structure of the part to be wound. For part skeletons with flat ends, existing clamping mechanisms generally have flat jaws. To prevent the jaws from obstructing the skeleton, the jaws clamp the ends of the skeleton from the left and right sides during loading. However, this loading method is prone to problems such as the part skeleton falling off and low positioning accuracy. Utility Model Content

[0003] To address the problems of existing technologies, this utility model provides a clamping mechanism, including a clamping head assembly and an opening and closing drive mechanism. The clamping head assembly includes a fixed clamping head, a movable clamping head, a movable sleeve, and a spring sleeve.

[0004] One end of the fixed chuck is a semi-cylindrical first clamping end, and the horizontal side of the first clamping end is a clamping surface, on which a first mounting groove is provided; one end of the movable chuck is hinged in the first mounting groove via a hinge shaft, and the other end is a flat second clamping end, which is used to cooperate with the clamping surface to clamp the skeleton of the part.

[0005] The movable sleeve is fitted onto the fixed chuck, and a second mounting groove is provided at the end facing the clamping surface; the middle part of the movable chuck is bent upward and has a connecting hole, and a pin passing through the connecting hole is installed in the second mounting groove;

[0006] The spring sleeve is installed between the other end of the fixed clamp and the movable sleeve; the opening and closing drive mechanism is used to drive the movable sleeve to move along its axis.

[0007] Furthermore, the connecting hole is an elongated hole with its long side perpendicular to the axis.

[0008] Furthermore, a protrusion extends downward from the top of the second clamping end, which is used to contact the part skeleton.

[0009] Furthermore, when the second clamping end is in contact with the clamping surface, the angle between the line connecting the hinge shaft and the pin shaft and the clamping surface is greater than or equal to 90 degrees.

[0010] Furthermore, the chuck assemblies are arranged in pairs, and when the chuck assemblies stop rotating, the clamping surface of the first clamping end faces upward.

[0011] Furthermore, a positioning protrusion is provided on the clamping surface of the first clamping end, and an avoidance hole is provided at the corresponding position of the second clamping end; the positioning protrusions on the opposite set of clamping surfaces are in different positions.

[0012] Furthermore, the end of the movable sleeve that contacts the spring sleeve has a flange.

[0013] Furthermore, the moving end of the opening and closing drive mechanism is connected to a bi-forked stop, which is engaged with the front end of the flange flange.

[0014] Furthermore, the opening of the bi-forked stop faces upward, and the side of the bi-forked stop facing the flange flange is the force-bearing surface, used to contact the flange flange.

[0015] Furthermore, the other end of the fixed chuck is a block-shaped connecting end, which is used to connect to the drive shaft, and the drive shaft is used to drive the fixed chuck to rotate.

[0016] When in use, the clamping mechanism provided in this application pushes the movable sleeve to move backward along the axis. The movable sleeve drives the movable chuck to rotate around its hinge axis in the first mounting groove through the cooperation of the pin and the connecting hole. The end of the movable chuck that mates with the clamping surface tilts upward and moves a certain distance along its axis with the movable sleeve, reducing the obstruction of the fixed chuck clamping surface by the movable chuck when the chuck assembly is opened. This facilitates the automatic loading of the part skeleton onto the clamping surface. Then, the movable sleeve is released, and the movable chuck clamps the part skeleton under the action of the spring sleeve.

[0017] The beneficial effects of this application are: the chuck assembly can open to a certain angle when opening and closing, and the movable chuck can also move a certain distance along the axis, reducing the obstruction of the clamping surface of the fixed chuck, thereby reducing the difficulty of loading, analyzing the falling of the part skeleton, and improving the positioning accuracy of the part skeleton. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of the clamp assembly in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the movable clamp in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the fixed clamp in an embodiment of the present utility model;

[0022] Figure 5 This is an installation diagram of an embodiment of the present utility model.

[0023] Wherein, 1: opening and closing drive mechanism; 2: fixed chuck; 3: movable chuck; 4: moving sleeve; 5: spring sleeve; 6: hinge shaft; 7: part skeleton; 8: drive shaft; 11: bifurcated stop; 21: first clamping end; 22: clamping surface; 23: first mounting groove; 24: positioning protrusion; 25: connecting end; 31: second clamping end; 32: connecting hole; 33: clearance hole; 41: second mounting groove; 42: pin; 43: flange. Detailed Implementation

[0024] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly. The connection can be a direct connection or an indirect connection.

[0027] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] like Figure 1 The diagram shown is a structural schematic of the clamping mechanism in one embodiment of this application. The clamping mechanism provided in this embodiment includes a clamping head assembly and an opening and closing drive mechanism 1. The clamping head assembly includes a fixed clamping head 2, a movable clamping head 3, a movable sleeve 4, and a spring sleeve 5.

[0029] The chuck assembly is used to clamp the part skeleton 7, and the opening and closing drive mechanism 1 is used to drive the movable chuck 3 and the fixed chuck 2 of the chuck assembly to open and close, facilitating loading and unloading operations. During loading and unloading, the fixed chuck 2 of the chuck assembly remains stationary, and the movable sleeve 4 applies a thrust along the axis to the movable chuck 3, driving the relative movement between the movable chuck 3 and the fixed chuck 2 to achieve clamping and opening. The spring sleeve 5 applies a spring force to the movable chuck 3 to keep it clamped, facilitating the chuck assembly to clamp the part skeleton 7 during the winding process.

[0030] like Figure 2 As shown, this embodiment is a cross-sectional view of the chuck assembly. The cross-sectional plane is perpendicular to the axis of the hinge shaft 6 and passes through the axis of the fixed chuck 2. In this embodiment, one end of the fixed chuck 2 is a semi-cylindrical first clamping end 21, and the horizontal side of the first clamping end 21 is a clamping surface 22. A first mounting groove 23 is provided on the clamping surface 22. One end of the movable chuck 3 is hinged to the first mounting groove 23 through the hinge shaft 6, and the other end is a flat second clamping end 31. The second clamping end 31 is used to cooperate with the clamping surface 22 to clamp the part skeleton 7.

[0031] In this system, the chuck assembly needs to rotate the part skeleton 7 during use. The cylindrical structure improves rotational stability. The semi-cylindrical first clamping end 21 uses its horizontal side as a clamping surface 22 to support the part skeleton 7. Rotating the clamping surface 22 to an upward position facilitates loading and unloading operations and reduces the risk of the part skeleton falling. The second clamping end 31 of the movable chuck 3 is flat and can fit against the clamping surface 22 of the first clamping end 21, thus clamping the part skeleton 7 tightly. The first mounting groove 23 is perpendicular to the clamping surface 22, allowing the movable chuck 3 to rotate around the hinge axis 6 and perpendicular to the clamping surface 22. When the chuck assembly is open, the upper part of the clamping surface 22 is exposed as much as possible for loading and unloading. The other end of the fixed chuck 2 can be connected to a motor to realize the rotational movement of the entire chuck assembly.

[0032] The movable sleeve 4 is fitted onto the fixed chuck 2, and a second mounting groove 41 is provided at one end facing the clamping surface 22; the middle part of the movable chuck 3 is bent upward and a connecting hole 32 is provided, and a pin 42 passing through the connecting hole 32 is installed in the second mounting groove 41.

[0033] The fixed chuck 2 preferably has a cylindrical shape in the middle. Compared to other cylindrical fixed chucks, this shape allows for more stable rotation and facilitates the machining of the first clamping end 21. The movable sleeve 4 preferably has a cylindrical structure, which facilitates its cooperation with the fixed chuck 2 and further improves stability. The movable sleeve 4 is used to drive the movable chuck 3 to rotate, and therefore needs to be connected to the movable chuck 3. In this embodiment, the middle of the movable chuck 3 is bent upwards to facilitate the connection of the movable sleeve 4. The movable sleeve 4 can pull the movable chuck 3 to rotate through the cooperation of the pin 42 and the connecting hole 32. Compared to a straight movable chuck 3, the movable chuck 3 with a bent middle in this application allows the second clamping end 31 to move a greater distance along the axis of the chuck assembly when rotating by the same angle, reducing obstruction above the clamping surface 22 and facilitating loading and unloading operations. This embodiment can reduce the opening and closing angle of the movable chuck 3, thereby improving clamping accuracy and stability, and reducing wear on the hinge shaft 6.

[0034] The spring sleeve 5 is installed between the other end of the fixed clamp 2 and the movable sleeve 4; the opening and closing drive mechanism 1 is used to drive the movable sleeve 4 to move along its axis.

[0035] The other end of the fixed chuck 2 is connected to a motor to drive the rotating chuck assembly to rotate. The spring sleeve 5 provides elastic force to the movable sleeve 4, moving it towards the clamping end and keeping the chuck assembly normally closed, reducing the probability of parts falling off. The opening / closing drive mechanism 1 is only used to push the movable sleeve 4 during loading and unloading, causing the movable chuck 3 to open. During winding, the opening / closing drive mechanism 1 does not contact the movable sleeve 4, minimizing its impact on the winding process.

[0036] In this embodiment, the connected hole 32 is an elongated hole with its long side perpendicular to the axis.

[0037] The pin 42 in the second mounting groove 41 will rotate around the hinge axis 6 with the movable chuck 3 and move along its axis with the movable sleeve 4. Therefore, it needs to move in a direction perpendicular to the axis and the rotation axis. Setting the connecting hole 32 as an elongated hole can ensure that the movement of the pin 42 is not affected.

[0038] like Figure 3 The diagram shown is a schematic diagram of the structure of the movable clamp in this embodiment. In this embodiment, the top end of the second clamping end 31 extends downward with a protrusion, which is used to contact the part skeleton 7.

[0039] The second clamping end 31 is flat and cooperates with the clamping surface 22 of the first clamping end 21 of the fixed chuck 2. The top of the second clamping end 31 is provided with a protrusion facing the clamping surface 22, which can reduce the contact area, thereby increasing the pressure during clamping, reducing friction, and improving the stability of clamping the part skeleton 7.

[0040] Furthermore, when the second clamping end 31 is in contact with the clamping surface 22, the angle between the line connecting the hinge shaft 6 and the pin shaft 42 and the clamping surface 22 is greater than or equal to 90 degrees.

[0041] Among them, such as Figure 3 As shown, when the second clamping end 31 is in contact with the clamping surface 22, the line connecting the hinge shaft 6 and the pin shaft 42 passes through the clamping surface 22. The included angle between them determines the smoothness of the opening and closing of the movable chuck 3, as well as the degree of obstruction of the clamping surface 22 after the movable chuck 3 is opened. When the included angle is greater than or equal to 90 degrees, the movable chuck 3 can not only open smoothly, but also obstruct the clamping surface 22 less. Preferably, the included angle is 120 degrees.

[0042] like Figure 4 The diagram shown is a structural schematic of the fixed clamp in this embodiment. In this embodiment, a positioning protrusion 24 is provided on the clamping surface 22, and an avoidance hole 33 is provided at the corresponding position of the second clamping end 31; the positions of the positioning protrusions 24 on the opposite set of clamping surfaces 22 are different.

[0043] The clamping surface 22 of the first clamping end 21 is provided with a positioning protrusion 24, which can position the part skeleton 7 and improve the installation accuracy. The positioning protrusions 24 on the relatively set chuck assembly are at different positions, which can determine the direction when winding the part skeleton that needs to be fixed in direction. The two positioning protrusions 24 can also be used for coarse positioning and fine positioning respectively, so as to further improve the positioning accuracy.

[0044] like Figure 5 The diagram shown is an installation schematic of this embodiment. In this embodiment, the clamping assemblies are arranged in pairs. When the clamping assemblies stop rotating, the clamping surface 22 of the first clamping end 21 faces upward.

[0045] An encoder can be installed on the chuck assembly or the rotating shaft connected to the chuck assembly, enabling the spindle motor to control the clamping surface 22 to face upwards when stopped. The chuck assemblies are arranged in pairs, with one chuck assembly connected to the spindle motor on one side and the other chuck assembly connected to the spindle motor via a transmission mechanism, so that the two sets of chuck assemblies can rotate synchronously.

[0046] In this embodiment, the end of the movable sleeve 4 that contacts the spring sleeve 5 has a flange flange 43. The moving end of the opening and closing drive mechanism 1 is connected to a bifurcated stop 11, which is engaged with the front end of the flange flange 43. The opening of the bifurcated stop 11 faces upward, and the side of the bifurcated stop 11 facing the flange flange 43 is the force-bearing surface, used to contact the flange flange 43.

[0047] The protruding flange 43 not only makes the thrust of the spring sleeve 5 more uniform, but also facilitates connection with the opening and closing drive mechanism 1, the body of which can be mounted on the frame. The sleeve portion of the movable sleeve 4 is positioned between the two branches of the bifurcated stop 11 and does not contact the bifurcated stop 11. When the opening and closing drive mechanism 1 drives the bifurcated stop 11 to move axially, the two branches of the bifurcated stop 11 contact the flange 43 of the movable sleeve 4 and apply a thrust to the flange 43, causing the movable sleeve 4 to move against the elastic force of the spring sleeve 5, thus opening the chuck assembly. The moving end of the opening and closing drive mechanism 1 can be connected to the bifurcated stop 11 via a connecting plate. Multiple bifurcated stops 11 can be mounted on the connecting plate, allowing the opening and closing drive mechanism 1 to drive multiple chuck assemblies simultaneously, improving production efficiency.

[0048] In this embodiment, the other end of the fixed clamp 2 is a block-shaped connecting end 25, which is used to connect with the drive shaft 8. The drive shaft 8 is used to drive the fixed clamp 2 to rotate.

[0049] The block-shaped connecting end 25 of the fixed chuck 2 can better support the spring sleeve 5 and is bolted to the drive shaft 8. The drive shaft 8 is mounted on the frame by bearings and is connected to the spindle motor. The drive shaft 8 can also transmit torque to the chuck assembly on the opposite side via a synchronous belt.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A clamping mechanism, characterized in that, It includes a chuck assembly and an opening and closing drive mechanism (1). The chuck assembly includes a fixed chuck (2), a movable chuck (3), a movable sleeve (4), and a spring sleeve (5). One end of the fixed clamp (2) is a semi-cylindrical first clamping end (21), and the horizontal side of the first clamping end (21) is a clamping surface (22). A first mounting groove (23) is provided on the clamping surface (22). One end of the movable clamp (3) is hinged in the first mounting groove (23) through a hinge shaft (6), and the other end is a flat second clamping end (31). The second clamping end (31) is used to cooperate with the clamping surface (22) to clamp the part skeleton (7). The movable sleeve (4) is sleeved on the fixed chuck (2) and a second mounting groove (41) is provided at one end facing the clamping surface (22); the middle part of the movable chuck (3) is bent upward and a connecting hole (32) is provided, and a pin (42) passing through the connecting hole (32) is installed in the second mounting groove (41). The spring sleeve (5) is installed between the other end of the fixed clamp (2) and the movable sleeve (4); the opening and closing drive mechanism (1) is used to drive the movable sleeve (4) to move along its axis.

2. The clamping mechanism according to claim 1, characterized in that, The connecting hole (32) is an elongated hole with its long side perpendicular to the axis.

3. The clamping mechanism according to claim 1, characterized in that, The top of the second clamping end (31) extends downward with a protrusion for contacting the part skeleton (7).

4. The clamping mechanism according to claim 3, characterized in that, When the second clamping end (31) is in contact with the clamping surface (22), the angle between the line connecting the hinge shaft (6) and the pin shaft (42) and the clamping surface (22) is greater than or equal to 90 degrees.

5. The clamping mechanism according to claim 1, characterized in that, The clamping assemblies are arranged in pairs, and when the clamping assemblies stop rotating, the clamping surface (22) of the first clamping end (21) faces upward.

6. The clamping mechanism according to claim 5, characterized in that, The first clamping end (21) has a positioning protrusion (24) on the clamping surface (22), and the second clamping end (31) has a clearance hole (33) at the corresponding position; the positioning protrusions (24) on the opposite set of clamping surfaces (22) are in different positions.

7. The clamping mechanism according to claim 1, characterized in that, The movable sleeve (4) has a flange (43) at the end that contacts the spring sleeve (5).

8. The clamping mechanism according to claim 7, characterized in that, The moving end of the opening and closing drive mechanism (1) is connected to a bi-shaped stop (11), which is engaged at the front end of the flange flange (43).

9. The clamping mechanism according to claim 8, characterized in that, The opening of the bi-forked stop (11) faces upward, and the side of the bi-forked stop (11) facing the flange flange (43) is the force-bearing surface, which is used to contact the flange flange (43).

10. The clamping mechanism according to claim 1, characterized in that, The other end of the fixed clamp (2) is a block-shaped connecting end (25) for connecting with the drive shaft (8), which is used to drive the fixed clamp (2) to rotate.

Images