CN219945865U

CN219945865U - Last blank fixture

Info

Publication number: CN219945865U
Application number: CN202320529537.1U
Authority: CN
Inventors: 张国林
Original assignee: Jiujiang Baiyida Machinery Co ltd Nanhai District Foshan City
Current assignee: Jiujiang Baiyida Machinery Co ltd Nanhai District Foshan City
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-11-03
Anticipated expiration: 2033-03-17

Abstract

The utility model belongs to the technical field of numerical control last carving machines, and particularly relates to a last blank clamping mechanism, which comprises a clamping arm, wherein the bottom end of the clamping arm is provided with a mounting cavity, a transmission assembly with a shaft axis forming a certain included angle with the length direction of the clamping arm is mounted in the mounting cavity, one end of the transmission assembly is connected with a clamping assembly in a transmission manner, the top end of the clamping arm is connected with a hydraulic assembly, the hydraulic assembly comprises a pressurizing cylinder, a longitudinal rotating shaft and a planetary reducer, the output end of the pressurizing cylinder is connected with the longitudinal rotating shaft, and the planetary reducer is sleeved on the two ends of the longitudinal rotating shaft; according to the clamping device, the workpiece is clamped or loosened through the cooperation of the pressurizing cylinder and the elastic piece, so that the clamping force of the clamping mechanism on the workpiece can be prevented from being lost under the influence of external factors, the pressurizing cylinder is adopted to replace a traditional hydraulic station, the transmission structure is optimized, the cost is reduced, and the stable clamping process can be ensured.

Description

Last blank fixture

Technical Field

The utility model belongs to the technical field of numerical control last carving machines, and particularly relates to a last blank clamping mechanism.

Background

In the production process of shoemaking, the shoe is prepared by mounting the shoe on the shoe last, and in order to accurately process the shoe in the production procedure, the shoe last is required to be fixed by a clamp, so that the position movement in the processing process is prevented.

The numerical control shoe last machine in the prior art generally adopts a hydraulic or pneumatic direct connection clamp to control the clamp to fix the shoe last, and the main defects of the clamping mode of the shoe last blank are as follows: the hydraulic cylinder or the pneumatic cylinder needs to be kept in a working state all the time, and is difficult to continue working under the condition of failure or defect; meanwhile, the clamping force is small and unstable, so that the phenomenon that the shoe tree slides or swings in the processing process and the processing precision is seriously affected is caused.

Disclosure of Invention

The utility model aims to provide a last blank clamping mechanism which solves one or more technical problems existing in the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the last blank clamping mechanism comprises a clamping arm, wherein a mounting cavity is formed in the bottom end of the clamping arm, a transmission assembly with a shaft axis forming a certain included angle with the length direction of the clamping arm is mounted in the mounting cavity, one end of the transmission assembly is connected with a clamping assembly in a transmission manner, the top end of the clamping arm is connected with a hydraulic assembly, the hydraulic assembly comprises a pressurizing cylinder, a longitudinal rotating shaft and a planetary reducer, the output end of the pressurizing cylinder is connected with the longitudinal rotating shaft, and the planetary reducer is sleeved on the two ends of the longitudinal rotating shaft; the transmission assembly comprises a guide block, a connecting rod and a cover plate, one end of the guide block is fixedly connected with the connecting rod, an elastic piece is sleeved on the outer side of the connecting rod, the connecting rod is far away from the other end of the guide block and is abutted to the clamping assembly, and the cover plate is fixedly connected to one side of the clamping arm through a bolt.

As a further improvement of the technical scheme, the clamping assembly comprises clamping jaws and a group of clamping strips capable of sliding back and forth along the axial lead of the clamping jaws, wherein the clamping jaws are provided with mounting grooves, the cross sections of the mounting grooves are isosceles trapezoids, and the clamping strips are symmetrically embedded in the mounting grooves.

As a further improvement of the technical scheme, the wedge-shaped groove matched with the shoe tree is formed in the clamping strip, and the inclined surface at the lower end of the clamping strip is matched with the peripheral inclined wedge of the lower part of the clamping jaw to force the clamping jaw to be folded so as to clamp a workpiece.

As a further improvement of the technical scheme, the clamping arm is of a half-arch structure, and a pressure oil duct which is communicated with the pressurizing cylinder to the mounting cavity is formed in the clamping arm and the longitudinal rotating shaft.

As a further improvement of the technical scheme, the top end of the clamping arm is integrally formed with a round table, an embedded groove is formed in the round table, a circular ring convex strip is arranged in the embedded groove, and the clamping arm is connected with the planetary reducer in a clamping mode through the round table.

In summary, the beneficial effects of the utility model are as follows:

the clamping mechanism clamps or loosens the workpiece through the cooperation of the pressurizing cylinder and the elastic piece, and is different from the clamping mode in the prior art in that the pressurizing cylinder is used as a power source for loosening the workpiece, the elastic piece is used for clamping the workpiece, the clamping force of the workpiece cannot be lost under the influence of external factors or failure of a hydraulic component, the pressurizing cylinder is adopted to replace a traditional hydraulic station, a transmission structure is optimized, the cost is reduced, the stable clamping process can be ensured, and no shaking is generated, so that the phenomenon that the shoe tree seriously affects the machining precision, such as slipping or swinging, occurs during machining is solved.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a schematic view of the structure of the lasting block gripping mechanism of the present utility model;

FIG. 2 is a half cross-sectional view of the lasting block gripping mechanism of the present utility model;

FIG. 3 is an enlarged view of a portion of the lasting blank gripping mechanism of FIG. 2;

FIG. 4 is a schematic view of the structure of the clamping arm and clamping assembly of the present utility model;

fig. 5 is an exploded view of the clamping arm and transmission assembly and clamping assembly of the present utility model.

Reference numerals in the drawings illustrate:

1. a clamping arm; 11. a mounting cavity; 12. a pressure oil passage; 2. a transmission assembly; 21. a guide block; 22. a connecting rod; 23. a cover plate; 24. an elastic member; 3. a clamping assembly; 31. a clamping jaw; 311. a mounting groove; 32. a clamping bar; 321. wedge-shaped grooves; 4. a hydraulic assembly; 41. a pressurizing cylinder; 42. a longitudinal rotation shaft; 43. a planetary reducer; 5. round bench; 51. a fitting groove; 52. annular convex strips.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.

In the description of the present utility model, if there is a word description such as "a plurality" or the like, the meaning of the plurality is one or more, the meaning of the plurality is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and above, below, within, etc. are understood to include the present number. The description of first, second, and third is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

With reference to fig. 1 to 5, several embodiments of a last gripping mechanism according to the utility model are illustrated below.

The last blank clamping mechanism comprises a clamping arm 1, a mounting cavity 11 is formed in the bottom end of the clamping arm 1, a transmission assembly 2 with a shaft axis forming a certain included angle with the length direction of the clamping arm 1 is mounted in the mounting cavity 11, one end of the transmission assembly 2 is connected with a clamping assembly 3 in a transmission manner, the top end of the clamping arm 1 is connected with a hydraulic assembly 4, the hydraulic assembly 4 comprises a pressurizing cylinder 41, a longitudinal rotating shaft 42 and a planetary reducer 43, the output end of the pressurizing cylinder 41 is connected with the longitudinal rotating shaft 42, and the planetary reducer 43 is sleeved on two ends of the longitudinal rotating shaft 42; the transmission assembly 2 comprises a guide block 21, a connecting rod 22 and a cover plate 23, one end of the guide block 21 is fixedly connected with the connecting rod 22, an elastic piece 24 is sleeved on the outer side of the connecting rod 22, the other end of the connecting rod 22 away from the guide block 21 is abutted against the clamping assembly 3, and the cover plate 23 is fixedly connected to one side of the clamping arm 1 through a bolt.

Specifically, in order to prevent the shoe last from seriously affecting the processing precision, such as slipping or swinging, the shoe last blank clamping mechanism adopts the booster cylinder 41 to firmly fix the shoe last under the action of the elastic piece 24, the booster cylinder 41 is used for clamping the shoe last placed on the clamping component 3, and the transmission component 2 is used for controlling the movement of the clamping component 3, so that the clamping is stable and no shaking occurs; the clamping strip 32 of the clamping component 3 is smaller than the head and tail of the processed shoe coffin, so that the clamping component 3 is prevented from colliding with the shoe last to cause the damage of a knife edge or a clamp; in addition, the last blank clamping mechanism is divided into a main shaft thimble and a rear rotary center according to the functions of the last blank clamping mechanism, and the main shaft thimble and the rear rotary center are designed according to the characteristics of shoe processing on the basis of a common machine tool clamp.

As shown in fig. 3, in this embodiment, the clamping assembly 3 includes a clamping jaw 31 and a group of clamping bars 32 capable of sliding reciprocally along the axial line of the clamping jaw 31, the clamping jaw 31 is provided with a mounting groove 311, the cross section of the mounting groove 311 is isosceles trapezoid, the clamping bars 32 are symmetrically embedded in the mounting groove 311, the clamping bars 32 are provided with wedge grooves 321 adapted to the shoe tree, and the inclined surfaces of the lower ends of the clamping bars 32 are in inclined fit with the peripheral sides of the lower parts of the clamping jaw 31, so that the clamping jaw 31 is forced to be folded to clamp a workpiece.

Specifically, the mounting groove 311 on one side of the clamping jaw 31 can control the clamping bar 32 to clamp the shoe tree, wherein, the embedding groove 51 is formed on one side of the back of the clamping bar 32, one end of the connecting rod 22 extends into the embedding groove 51, the clamping bar 32 clamps or releases under the action of the connecting rod 22, the shoe tree is mounted in the wedge groove 321 of the clamping bar 32, the wedge groove 321 is matched with the shoe heel current status, the shoe tree can be rapidly mounted in the clamping bar 32, the connecting rod 22 reciprocates under the driving of the guide block 21, meanwhile, the elastic piece 24 on the outer side of the connecting rod 22 is driven to stretch, under the action of elastic force, the elastic piece 24 abuts against the clamping bar 32 to enable the clamping bar to shrink and clamp, thereby completing the clamping process, wherein, the elastic piece 24 can adopt a reset spring or other materials with elastic force, and can ensure that the workpiece is not easy to loose and skid in the clamping process.

As shown in fig. 4 and 5, in the present embodiment, the clamping arm 1 has a semi-arcuate structure, and the interior of the clamping arm 1 and the longitudinal shaft 42 is provided with a pressure oil duct 12 for communicating the pressure cylinder 41 with the installation cavity 11, the top end of the clamping arm 1 is integrally formed with a circular table 5, the circular table 5 is provided with an engaging groove 51, a circular ring convex strip 52 is provided in the engaging groove 51, and the clamping arm 1 is engaged with the planetary reducer 43 through the circular table 5.

Specifically, the pressure oil duct 12 in the clamping arm 1 is communicated with the hydraulic cylinder and the installation cavity 11, under the action of the booster cylinder 41, the transmission assembly 2 controls the clamping assembly 3 to clamp the shoe last, the round table 5 is arranged at one end of the clamping arm 1, the round table 5 can be quickly used with the planetary reducer 43, the planetary reducer 43 is used for controlling the clamping arm 1 to perform variable speed rotary motion, and therefore the shoe last carving machine is convenient to finish machining on the shoe last.

The working principle of the utility model is as follows:

the last blank processed in the previous step is placed in the clamping strip 32 of the clamping jaw 31, equipment is started, the pressurizing cylinder 41 transmits hydraulic oil to the longitudinal rotating shaft 42 to enter the mounting cavity 11 through the pressure oil duct 12, the guide block 21 is driven to drive the connecting rod 22 to reciprocate, the elastic piece 24 keeps self elastic force to reset and compress under the action of the connecting rod 22, and the clamping strip 32 and the clamping jaw 31 are mutually closed to enable the clamping jaw 31 to be folded under the action of the elastic piece 24, so that a workpiece is clamped. When the last processing is completed and the unloading is required, the pressure is released by the pressure cylinder 41, the guide block 21 and the connecting rod 22 move upwards and reset under the action of the elastic piece 24, the clamping strip 32 is loosened under the action of the elastic piece 24, and the clamping jaw 31 is opened to enter the next working cycle under the action of the elastic force.

The embodiments of the present utility model are all preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The last blank clamping mechanism comprises a clamping arm and is characterized in that an installation cavity is formed in the bottom end of the clamping arm, a transmission assembly with an axial lead forming a certain included angle with the length direction of the clamping arm is installed in the installation cavity, one end of the transmission assembly is connected with a clamping assembly in a transmission mode, the top end of the clamping arm is connected with a hydraulic assembly, the hydraulic assembly comprises a pressurizing cylinder, a longitudinal rotating shaft and a planetary reducer, the output end of the pressurizing cylinder is connected with the longitudinal rotating shaft, and the planetary reducer is sleeved on two ends of the longitudinal rotating shaft; the transmission assembly comprises a guide block, a connecting rod and a cover plate, one end of the guide block is fixedly connected with the connecting rod, an elastic piece is sleeved on the outer side of the connecting rod, the connecting rod is far away from the other end of the guide block and is abutted to the clamping assembly, and the cover plate is fixedly connected to one side of the clamping arm through a bolt.

2. The last blank clamping mechanism according to claim 1, wherein the clamping assembly comprises a clamping jaw and a group of clamping bars capable of sliding back and forth along the axial line of the clamping jaw, a mounting groove is formed in the clamping jaw, the cross section of the mounting groove is isosceles trapezoid, and the clamping bars are symmetrically embedded in the mounting groove.

3. The last blank clamping mechanism according to claim 2, wherein the clamping bar is provided with a wedge-shaped groove matched with the last, and the inclined surface of the lower end of the clamping bar is obliquely matched with the periphery of the lower part of the clamping jaw to force the clamping jaw to retract so as to clamp the workpiece.

4. The last blank clamping mechanism according to claim 3, wherein the clamping arms are of a semi-arch structure, and the clamping arms and the interior of the longitudinal shaft are provided with pressure oil channels which communicate the pressure cylinder to the mounting cavity.

5. The last blank clamping mechanism according to claim 4, wherein a round table is integrally formed at the top end of the clamping arm, an embedded groove is formed in the round table, a circular ring convex strip is arranged in the embedded groove, and the clamping arm is in clamping connection with the planetary reducer through the round table.