Three-jaw clamping mechanism

Abstract

The utility model relates to a three-jaw clamping mechanism which comprises a bottom plate, a moving assembly and a clamping assembly. The moving assembly is arranged on the bottom plate; the clamping assembly is arranged on the moving assembly, the clamping assembly comprises a mounting seat, a positioning block, three clamping jaws, a driving air cylinder, a transmission piece and a transmission rod, the mounting seat is arranged on the moving assembly, the positioning block is fixedly arranged on the mounting seat, the clamping jaws are connected with the positioning block in a swinging mode, and the driving air cylinder is arranged on the transmission piece. The three clamping jaws are arranged in the circumferential direction of the positioning block at intervals, the driving air cylinder is fixedly connected with the positioning block, the transmission piece is fixedly connected with the telescopic end of the driving air cylinder, one end of the transmission rod is hinged to the transmission piece, and the other end of the transmission rod is hinged to the clamping jaws. According to the utility model, the phenomena of falling and unstable clamping caused by unstable gravity center of a workpiece can be effectively avoided, the workpiece can be clamped during processing, and the processing precision is effectively improved.

Description

Technical Field

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

[0002] When machining parts, the parts are usually placed on a clamping fixture. The worker rotates the lead screw to drive the clamping block to clamp the parts. Then the worker performs subsequent operations such as drilling and grinding on the parts.

[0003] like Figure 1 The workpiece shown is irregular in appearance, making it difficult to hold with ordinary clamping fixtures. For such irregularly shaped workpieces, internal clamping fixtures are generally used, such as Chinese Patent CN 213080097 U. However, because the workpiece is long, it is easy to fall due to an unstable center of gravity, resulting in unstable clamping and making it impossible to process the workpiece. Utility Model Content

[0004] Therefore, it is necessary to provide a three-jaw clamping mechanism to address the problem that existing clamping fixtures are prone to dropping irregularly shaped workpieces due to unstable center of gravity, resulting in unstable clamping and inability to process the workpieces.

[0005] A three-jaw gripping mechanism, comprising:

[0006] Base plate;

[0007] A movable component, the movable component being disposed on the base plate; and

[0008] A clamping assembly is disposed on the moving assembly. The clamping assembly includes a mounting base, a positioning block, grippers, a drive cylinder, a transmission component, and a transmission rod. The mounting base is mounted on the moving assembly, the positioning block is fixedly disposed on the mounting base, the grippers are oscillatingly connected to the positioning block, and there are three grippers spaced apart circumferentially along the positioning block. The drive cylinder is fixedly connected to the positioning block, the transmission component is fixedly connected to the telescopic end of the drive cylinder, one end of the transmission rod is hinged to the transmission component, and the other end of the transmission rod is hinged to the grippers.

[0009] The aforementioned three-jaw clamping mechanism, driven by a cylinder, moves the transmission component toward the positioning block. The jaws swing forward under the drive of the transmission rod, pressing them firmly against the edge of the workpiece's opening. This applies sufficient force to the workpiece, effectively preventing it from falling due to instability and ensuring secure clamping. It effectively clamps the workpiece during processing, improving machining accuracy. The three-jaw design ensures uniform force on the workpiece, preventing damage due to uneven force and improving machining quality.

[0010] In one of the embodiments, the positioning block comprises a fixed plate part and a positioning part connected to the fixed plate part, the fixed plate part is fixedly connected to the mounting base, the positioning part is fixedly arranged on one side of the fixed plate part, the positioning part is arranged in a cylindrical structure, and the positioning part is axially provided with an extension column.

[0011] In one of the embodiments, the clamping assembly further comprises a hinge shaft, the fixed plate part extends with mounting blocks, the number of the mounting blocks is four, the four mounting blocks are divided into two groups, the two groups of mounting blocks are arranged on the two sides of the fixed plate part, the two mounting blocks in each group are arranged at intervals, the mounting blocks are provided with mounting holes, the clamping jaws are provided with through holes matched with the mounting holes, the hinge shaft passes through the through holes and extends into the mounting holes, and the clamping jaws are hinged to the mounting blocks.

[0012] In one of the embodiments, the fixed plate part is provided with a clearance slot matched with the clamping jaw, the fixed plate part is provided with a fixed hinge hole, the hinge shaft passes through the through hole and extends into the fixed hinge hole, and the clamping jaw is hinged to the fixed plate part.

[0013] In one of the embodiments, the clamping jaw comprises a main body part, a hinge part connected to the main body part, and a clamping part connected to the main body part, the number of the hinge parts is two, the two hinge parts are arranged at intervals, the hinge parts are provided with connecting holes, the through holes are arranged on the main body part, the transmission rod is provided with a front hinge hole, the hinge shaft is clamped into the connecting holes through the front hinge hole, so that the clamping jaw is hinged to the transmission rod.

[0014] In one of the embodiments, the transmission part comprises a sleeve part and a connecting part connected to the sleeve part, the sleeve part is fixedly connected to the telescopic end of the driving cylinder, the connecting part is provided with a connecting slot, the transmission rod is clamped into the connecting slot, the connecting part is provided with a clamping hole, the transmission rod is provided with a rear hinge hole, the hinge shaft is clamped into the clamping hole through the rear hinge hole, so that the transmission rod is hinged to the transmission part.

[0015] In one of the embodiments, the number of the moving assemblies is two, and the two moving assemblies are arranged at intervals on the bottom plate.

[0016] In one of the embodiments, the moving assembly comprises a guide rail and a sliding seat, the guide rail is fixedly arranged on the bottom plate, the sliding seat is slidingly connected to the guide rail, and the mounting base is fixedly connected to the sliding seats of the two moving assemblies.

[0017] In one of the embodiments, the three-jaw clamping mechanism further comprises a fixing block and a fixing rod, the mounting base is provided with a through hole, the fixing block is fixedly arranged on the bottom plate, the fixing block is provided with a plug hole matched with the through hole, and the fixing rod penetrates through the through hole and extends into the plug hole to fix the mounting base.

[0018] In one of the embodiments, the three-jaw clamping mechanism further comprises a buffer, the buffer is fixedly arranged on the bottom plate, a buffer head of the buffer is aligned with the sliding seat, and the number of the buffers is two, and the two buffers are arranged at two ends of the mounting base along the guide rail direction. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural diagram of a workpiece;

[0020] Figure 2 is an assembly structure diagram of the three-jaw clamping mechanism in one of the embodiments of the utility model;

[0021] Figure 3 is a structural diagram of a positioning block in the three-jaw clamping mechanism as shown in Figure 2

[0022] Figure 4 is a structural diagram of a clamping jaw in the three-jaw clamping mechanism as shown in Figure 2

[0023] Figure 5 is a structural diagram of a transmission member in the three-jaw clamping mechanism as shown in Figure 2

[0024] Figure 6 is an effect diagram of the three-jaw clamping mechanism clamping a workpiece as shown in Figure 2

[0025] Meanings of the reference signs in the drawings are as follows:

[0026] 100 - three-jaw clamping mechanism;

[0027] 10 - bottom plate;

[0028] 20 - moving assembly, 21 - guide rail, 22 - sliding seat;

[0029] ​​​​30 - clamping assembly, 31 - mounting seat, 32 - positioning block, 321 - fixed plate part, 322 - positioning part, 323 - mounting block, 324 - mounting hole, 325 - clearance slot, 326 - fixed hinge hole, 327 - extension column, 33 - hinge shaft, 34 - clamping jaw, 341 - main body part, 342 - hinge part, 343 - clamping part, 344 - through hole, 345 - connecting hole, 35 - driving cylinder, 36 - transmission member, 361 - sleeving part, 362 - connecting part, 363 - connecting slot, 364 - clamping hole, 37 - transmission rod;

[0030] 40 - fixed block,

[0031] 50 - fixed rod;

[0032] 60 - buffer;

[0033] 200 - workpiece, 201 - pipe opening, 202 - pipe opening edge. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0035] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0036] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0039] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element.When an element is considered "connected" to another element, it can be directly connected to another element or there can be a middle element.The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0040] Please refer to Figure 2 , the three-jaw clamping mechanism 100 of an embodiment of the utility model, including bottom plate 10, moving assembly 20 and clamping assembly 30, moving assembly 20 is located on the bottom plate 10, clamping assembly 30 is located on the moving assembly 20.

[0041] Please refer to Figure 2 , the number of moving assembly 20 is two, and the two moving assemblies 20 are arranged on the bottom plate 10 with an interval.The moving assembly 20 includes a guide rail 21 and a sliding seat 22, the guide rail 21 is fixedly arranged on the bottom plate 10, and the sliding seat 22 is slidably connected with the guide rail 21.The moving assembly 20 is arranged more conveniently for the user to fix the workpiece 200 on the clamping assembly 30.

[0042] Please refer to Figure 2 And Figure 3The clamping assembly 30 comprises a mounting base 31, a positioning block 32, a hinged shaft 33, a clamping jaw 34, a driving cylinder 35, a transmission member 36 and a transmission rod 37. The mounting base 31 is fixedly connected with the sliding bases 22 of the two moving assemblies 20. The positioning block 32 is fixedly connected with the mounting base 31. The positioning block 32 comprises a fixed plate portion 321 and a positioning portion 322 connected with the fixed plate portion 321. The fixed plate portion 321 is fixedly connected with the mounting base 31. The fixed plate portion 321 extends mounting blocks 323. The number of the mounting blocks 323 is four. The four mounting blocks 323 are divided into two groups. The two groups of mounting blocks 323 are arranged on the two sides of the fixed plate portion 321. The two mounting blocks 323 in each group are arranged at intervals. The mounting blocks 323 are provided with mounting holes 324.

[0043] Please refer to Figure 2 and Figure 3 The end of the fixed plate portion 321 away from the mounting blocks 323 is provided with a clearance groove 325 matched with the clamping jaw 34. The fixed plate portion 321 is provided with a fixed hinged hole 326. The positioning portion 322 is fixedly arranged on one side of the fixed plate portion 321. The positioning portion 322 is arranged in a cylindrical structure. The positioning portion 322 is axially provided with an extension column 327. Thus, the pipe opening 201 of the workpiece 200 can be sleeved outside the extension column 327.

[0044] Please refer to Figure 2 and Figure 4 The number of the clamping jaw 34 is three. The clamping jaw 34 comprises a main body portion 341, a hinged portion 342 connected with the main body portion 341 and a clamping portion 343 connected with the main body portion 341. The main body portion 341 is provided with a through hole 344. Two clamping jaws 34 are inserted into the mounting holes 324 through the through holes 344 and hinged with the mounting blocks 323 through the hinged shaft 33. The last clamping jaw 34 is inserted into the fixed hinged hole 326 through the through hole 344 and hinged with the fixed plate portion 321 through the hinged shaft 33. The number of the hinged portions 342 is two. The two hinged portions 342 are arranged at intervals. The hinged portions 342 are provided with connecting holes 345. The transmission rod 37 is provided with a front hinged hole. The hinged shaft 33 is clamped into the connecting holes 345 through the front hinged hole, so that the clamping jaw 34 is hinged with the transmission rod 37.

[0045] Please refer to Figure 2 and Figure 5The driving cylinder 35 is fixedly connected with the end of the fixed plate part 321 away from the positioning part 322, the transmission part 36 is fixedly connected with the telescopic end of the driving cylinder 35, the transmission part 36 comprises a sleeving part 361 and a connecting part 362 connected with the sleeving part 361, the sleeving part 361 is fixedly connected with the telescopic end of the driving cylinder 35, the connecting part 362 is provided with a connecting groove 363, the transmission rod 37 is clamped into the connecting groove 363, the connecting part 362 is provided with a clamping hole 364, the transmission rod 37 is provided with a rear hinged hole, and the hinged shaft 33 passes through the rear hinged hole and is clamped into the clamping hole 364, so that the transmission rod 37 is hinged with the transmission part 36.

[0046] Please refer to Figure 2 The three-jaw clamping mechanism 100 further comprises a fixed block 40 and a fixed rod 50, the mounting seat 31 is provided with a through hole, the fixed block 40 is fixedly arranged on the bottom plate 10, the fixed block 40 is provided with a plug-in hole matched with the through hole, and the fixed rod 50 penetrates through the through hole and extends into the plug-in hole, so as to fix the mounting seat 31. In this way, when the workpiece 200 is machined, the workpiece 200 can be fixed and cannot move, and the machining precision is effectively improved.

[0047] Please refer to Figure 2 The three-jaw clamping mechanism 100 further comprises a buffer 60, the buffer 60 is fixedly arranged on the bottom plate 10, the buffer head of the buffer 60 is aligned with the sliding seat 22, and the number of the buffer 60 is two, and the two buffers 60 are arranged at two ends of the mounting seat 31 along the direction of the guide rail 21.

[0048] The working principle of the three-jaw clamping mechanism 100 in the embodiment is as follows: Figure 6 In work, an operator clamps the pipe opening 201 of the workpiece 200 outside the extension column 327 to preliminarily position, then holds the workpiece 200 by hand, drives the driving cylinder 35 to drive the transmission part 36 to move towards the positioning block 32, then the transmission part 36 cooperates with the transmission rod 37 to drive the clamping jaw 34 to swing forward around the hinged shaft 33 until the abutting part abuts against the pipe opening edge 202 of the workpiece 200, so as to complete the clamping action of the workpiece 200. Through cooperation of the driving cylinder 35, the transmission part 36, the transmission rod 37 and the clamping jaw 34, enough force can be applied to the workpiece 200, so that the workpiece 200 is effectively prevented from falling due to unstable gravity center and the phenomenon of unstable clamping occurs. In machining, the workpiece 200 can be clamped, and the machining precision is effectively improved.

[0049] The utility model discloses beneficial effect is: through drive cylinder 35 drive transmission 36 to the direction of the locating block 32 movement, the jaw 34 is under the drive of transmission rod 37 and swings forward, make the jaw 34 press tightly in the pipe orifice along the edge 202 of workpiece 200, so enough force is applied to workpiece 200, effectively avoid because workpiece 200 gravity instability and fall, the phenomenon of unstable clamping occurs, can clamp workpiece 200 when processing, effectively improve the machining accuracy, through the design of three jaw 34, can make workpiece 200 stress uniform, effectively avoid the phenomenon of workpiece 200 being injured because of uneven stress, effectively improve the processing quality.

[0050] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the range is recorded in the description.

[0051] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, on the premise of not departing from the utility model concept, can make several deformation and improvement, these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be the attached claims.

Claims

1. A three-jaw chuck, characterized by, The utility model relates to a kind of automatic packaging machine, including: Bottom plate; Mobile component, the mobile component is located on the bottom plate; And Clamping component, the clamping component is located on the mobile component, the clamping component includes mounting seat, positioning block, clamping jaw, drive cylinder, transmission part and transmission rod, the mounting seat is installed on the mobile component, the positioning block is fixedly arranged on the mounting seat, the clamping jaw is swingably connected the positioning block, the clamping jaw is three, three The clamping jaw is arranged along the positioning block circumferentially interval, the drive cylinder is fixedly connected with the positioning block, the transmission part is fixedly connected with the telescopic end of the drive cylinder, one end of the transmission rod is hinged with the transmission part, the other end of the transmission rod is hinged with the clamping jaw.

2. The three jaw chucking mechanism according to claim 1, wherein The positioning block includes fixed plate part and the positioning part connected with the fixed plate part, the fixed plate part is fixedly connected with the mounting seat, the positioning part is fixedly arranged on one side of the fixed plate part, the positioning part is arranged in cylindrical structure, and the positioning part is axially provided with extension column.

3. The three jaw chucking mechanism of claim 2, wherein, The clamping component further includes hinged shaft, the fixed plate part extends mounting block, the number of the mounting block is four, four The mounting block is divided into two groups, two groups of mounting block are arranged on the two sides of the fixed plate part, and two mounting blocks in each group are arranged at intervals, the mounting block is provided with mounting hole, the clamping jaw is provided with through hole matched with the mounting hole, the hinged shaft passes through the through hole and extends into the mounting hole, and the clamping jaw is hinged with the mounting block.

4. The three jaw chucking mechanism of claim 3, wherein, The fixed plate part is provided with the accommodation slot matched with the clamping jaw, the fixed plate part is provided with fixed hinge hole, the hinged shaft passes through the through hole and extends into the fixed hinge hole, and the clamping jaw is hinged with the fixed plate part.

5. The three jaw chucking mechanism of claim 4, wherein, The clamping jaw includes main body part, hinged part connected with the main body part and clamping part connected with the main body part, the number of the hinged part is two, two The hinged part is arranged at intervals, the hinged part is provided with connecting hole, the through hole is arranged on the main body part, the transmission rod is provided with front hinge hole, the hinged shaft is clamped into the connecting hole through the front hinge hole, so that the clamping jaw is hinged with the transmission rod.

6. The three jaw chucking mechanism of claim 5, wherein, The transmission part includes sleeve part and connecting part connected with the sleeve part, the sleeve part is fixedly connected with the telescopic end of the drive cylinder, the connecting part is provided with connecting slot, the transmission rod is clamped into the connecting slot, the connecting part is provided with clamping hole, the transmission rod is provided with rear hinge hole, the hinged shaft is clamped into the clamping hole through the rear hinge hole, so that the transmission rod is hinged with the transmission part.

7. The three jaw chucking mechanism of claim 1, wherein, The number of the mobile component is two, and two The mobile component is arranged at intervals on the bottom plate.

8. The three jaw chucking mechanism of claim 7, wherein, The mobile component includes guide rail and sliding seat, the guide rail is fixedly arranged on the bottom plate, the sliding seat is slidably connected with the guide rail, and the mounting seat is fixedly connected with the sliding seat of two The mobile component.

9. The three jaw chucking mechanism of claim 1, wherein, It further includes fixed block and fixed rod, the mounting seat is provided with through hole, the fixed block is fixedly arranged on the bottom plate, the fixed block is provided with insertion hole matched with the through hole, the fixed rod passes through the through hole and extends into the insertion hole, to fix the mounting seat.

10. The three jaw chucking mechanism of claim 8, wherein, Further comprising a buffer fixedly arranged on the bottom plate, a buffer head of the buffer being aligned with the sliding seat, the number of the buffer being two, and the two buffers being separately arranged at two ends of the mounting seat along the guide rail direction.

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