Zero-point positioning device with ejection function

Abstract

The utility model discloses a zero-point positioning device with an ejection function, and belongs to the technical field of machine manufacturing. The zero-point positioning device with the ejection function comprises a tray assembly which comprises a pin and a positioning disc, the pin is fixedly arranged on the first end face of the positioning disc, and the second end face of the positioning disc is used for installing a workpiece to be machined; the positioning seat is provided with a containing cavity, an insertion hole and a guide hole are formed in the positioning seat, the insertion hole and the guide hole are both communicated with the containing cavity, and the pin is inserted into the insertion hole; the ejection assembly is movably arranged in the guide hole in a penetrating manner, and the ejection assembly is used for ejecting the positioning disc; and the locking unit is arranged in the positioning seat, the locking unit and the insertion hole are coaxially arranged, the locking unit is used for clamping or loosening the pin, the locking unit comprises a piston, and the piston can move in the first direction and partially push the ejection assembly out of the guide hole. Manual auxiliary operation is not needed, and smooth separation of the positioning disc and the positioning seat is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing technical field especially, relate to a zero point positioning device with ejection function. BACKGROUND

[0002] With the continuous development of machining manufacturing technology, the performance of various machine tools is also continuously improved, and the demand for process equipment is increasingly simple, universal and efficient. Zero point positioning module is widely used. The zero point positioning module can realize rapid clamping, and the repeated positioning accuracy is very high, and is applied to aerospace and precision mechanical part manufacturing.

[0003] The existing zero point positioning module includes a positioning seat and a positioning disc. Due to the size precision, the positioning disc is usually stuck in the positioning seat after unlocking and cannot be automatically separated, so that smooth unlocking cannot be realized, and manual assistance with a hammer is needed to knock, so that the two can be separated.

[0004] Therefore, it is urgent to provide a zero point positioning device with ejection function to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a zero point positioning device with ejection function, which does not need manual assistance operation and ensures the smooth separation of the positioning disc and the positioning seat.

[0006] To achieve the above purpose, the following technical scheme is provided.

[0007] The zero point positioning device with ejection function comprises:

[0008] A tray assembly comprises a pin and a positioning disc, the pin is fixedly arranged on the first end surface of the positioning disc, and the second end surface of the positioning disc is used for mounting a workpiece to be machined;

[0009] A positioning seat has a receiving cavity, the positioning seat is provided with a insertion hole and a guide hole, the insertion hole and the guide hole are in communication with the receiving cavity, and the pin is inserted into the insertion hole;

[0010] An ejection assembly is movably arranged in the guide hole, and the ejection assembly is used for lifting the positioning disc;

[0011] A locking unit is arranged in the positioning seat and coaxially arranged with the insertion hole, the locking unit is used for clamping or loosening the pin, and the locking unit comprises a piston, the piston can move in a first direction and push the ejection assembly out of the guide hole.

[0012] As an optional scheme of the zero point positioning device with ejection function, the ejection assembly comprises an ejection cap and an ejection seat, and the ejection cap is threadedly connected with the ejection seat.

[0013] As an optional solution of the zero-point positioning device with the ejection function, the ejection cap comprises an ejection plate and a connecting column which are integrally connected, the ejection seat comprises a stop portion and a connecting cylinder which are integrally connected, an outer wall surface of the connecting column is provided with external threads, an inner wall surface of the connecting cylinder is provided with internal threads, the connecting column is screwed into the connecting cylinder, and the connecting cylinder is movably arranged in the guide hole.

[0014] As an optional solution of the zero-point positioning device with the ejection function, a plurality of guide holes are arranged in a circumferential direction and are spaced apart from each other with the insertion hole as a center.

[0015] As an optional solution of the zero-point positioning device with the ejection function, a first end surface of the positioning disc is provided with a first positioning portion, a second positioning portion is arranged on the positioning seat, and the first positioning portion and the second positioning portion are movably inserted.

[0016] As an optional solution of the zero-point positioning device with the ejection function, one of the first positioning portion and the second positioning portion is a positioning groove, and the other of the first positioning portion and the second positioning portion is a positioning protrusion.

[0017] As an optional solution of the zero-point positioning device with the ejection function, the first positioning portion extends along a radial direction of the positioning disc, and the second positioning portion extends along a radial direction of the insertion hole and towards an outer edge of the positioning seat.

[0018] As an optional solution of the zero-point positioning device with the ejection function, a plurality of the first positioning portions and a plurality of the second positioning portions are arranged in a circumferential direction of the positioning disc (12) and are spaced apart from each other, and the plurality of the first positioning portions and the plurality of the second positioning portions are arranged one-to-one.

[0019] As an optional solution of the zero-point positioning device with the ejection function, the positioning seat is provided with an inflation hole, the piston divides an inner part of the containing cavity into an upper cavity and a lower cavity, the inflation hole is in communication with the lower cavity, and the locking unit further comprises:

[0020] a support cylinder which is coaxially connected with the insertion hole, the piston is movably sleeved on the support cylinder, and a plurality of through holes are arranged in a circumferential direction on a cylinder wall of the support cylinder;

[0021] a plurality of balls which are located in the through holes;

[0022] a compression spring which is in abutment with the piston and an inner top wall of the containing cavity at two ends thereof.

[0023] As an optional solution of the zero-point positioning device with the ejection function, a first annular sealing member is arranged between an inner wall surface of the piston and an outer wall surface of the support cylinder; and / or

[0024] A second annular seal is arranged between the outer wall surface of the piston and the inner wall surface of the accommodating cavity; and / or

[0025] The inner wall surface of the piston is provided with an annular avoiding slot.

[0026] Compared with the prior art, the utility model has the advantages of:

[0027] The tray assembly can be placed on the positioning seat, the pin of the tray assembly can be clamped or loosened by the locking unit after being inserted into the insertion hole, the guide hole of the positioning seat is movably provided with the ejecting assembly, the piston of the locking unit moves in the first direction to not only unlock the locking unit and the pin, but also push the ejecting assembly out of the guide hole, the ejecting assembly is pushed out of the guide hole to lift the tray upward, so that the zero point positioning device with the ejecting function does not need manual auxiliary operation and can smoothly separate the positioning disc from the positioning seat. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the utility model. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the utility model and the drawings without creative labor.

[0029] Figure 1 It is an assembly diagram of the zero point positioning device with the ejecting function in the embodiments of the utility model;

[0030] Figure 2 It is an exploded schematic view of the zero point positioning device with the ejecting function in the embodiments of the utility model;

[0031] Figure 3 It is an exploded schematic view of the positioning module in the embodiments of the utility model;

[0032] Figure 4 It is a sectional view of the ejecting assembly in the embodiments of the utility model;

[0033] Figure 5 It is a sectional view of the ejecting cap in the embodiments of the utility model;

[0034] Figure 6 It is a sectional view of the ejecting seat in the embodiments of the utility model;

[0035] Figure 7 It is a sectional view of the zero point positioning device with the ejecting function in the embodiments of the utility model in the unlocked state;

[0036] Figure 8 A sectional view of the zero point positioning device with the ejection function in the embodiment of the utility model in the locked state.

[0037] Reference signs:

[0038] 1, tray assembly; 2, positioning seat; 3, ejection assembly; 4, locking unit;

[0039] 11, pin; 12, positioning disc; 121, first positioning part;

[0040] 21, accommodating cavity; 22, insertion hole; 23, guide hole; 24, second positioning part; 25, inflation hole;

[0041] 31, ejection cap; 311, ejection plate; 312, connecting column; 32, ejection seat; 321, stop part; 322, connecting cylinder;

[0042] 41, piston; 411, annular avoiding groove; 412, counterbore; 42, supporting cylinder; 421, through hole; 43, ball; 44, compression spring; 45, first annular sealing element; 46, second annular sealing element. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0044] In the description of the utility model, it should be pointed out that the orientation or position relationship indicated by the terms "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0045] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term "arrangement", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0046] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0047] In order to ensure the smooth separation of the positioning disc and the positioning seat without manual assistance, the embodiment provides a zero-point positioning device with ejection function, which is described below in combination with Figures 1 to 8 The specific content of the embodiment is described in detail. It should be noted that the first direction mentioned in the embodiment is Figure 8 Z direction in the above.

[0048] The zero-point positioning device with ejection function in the embodiment includes a tray assembly 1 and a positioning module. The positioning module includes a positioning seat 2, an ejection assembly 3 and a locking unit 4. The tray assembly 1 includes a pin 11 and a positioning disc 12, the pin 11 is fixedly arranged on the first end surface of the positioning disc 12, and the second end surface of the positioning disc 12 is used for mounting a workpiece to be processed. The positioning seat 2 has a receiving cavity 21, and the positioning seat 2 is provided with a insertion hole 22 and a guide hole 23, both of which are in communication with the receiving cavity 21, and the pin 11 is inserted into the insertion hole 22. The ejection assembly 3 is movably arranged in the guide hole 23, and the ejection assembly 3 is used for lifting the positioning disc 12. The locking unit 4 is arranged in the positioning seat 2 and coaxially arranged with the insertion hole 22, and the locking unit 4 is used for clamping or releasing the pin 11, and the locking unit 4 includes a piston 41, which can move in the first direction and push the ejection assembly 3 out of the guide hole 23.

[0049] In short, the zero-point positioning device with ejection function provided by the utility model can place the tray assembly 1 on the positioning seat 2, and the pin 11 of the tray assembly 1 can be clamped or released by the locking unit 4 after being inserted into the insertion hole 22, wherein the ejection assembly 3 is movably arranged in the guide hole 23 of the positioning seat 2, and the piston 41 of the locking unit 4 moves in the first direction not only to unlock the locking unit 4 and the pin 11, but also to push the ejection assembly 3 out of the guide hole 23, and the ejection assembly 3 can lift the tray upward after being pushed out of the guide hole 23, so that the zero-point positioning device with ejection function can be operated without manual assistance, and the positioning disc 12 and the positioning seat 2 can be smoothly separated.

[0050] Further, as shown in Figures 2 to 4 , the ejecting assembly 3 comprises an ejecting cap 31 and an ejecting seat 32, the ejecting cap 31 is threadedly connected with the ejecting seat 32. By screwing the ejecting cap 31 or the ejecting seat 32, the total length of the ejecting assembly 3 and the active stroke of the ejecting can be adjusted to meet the lifting of different types of positioning discs 12.

[0051] Specifically, as shown in Figures 4 to 6 , the ejecting cap 31 comprises an ejecting plate 311 and a connecting column 312 connected integrally. The ejecting seat 32 comprises a stop portion 321 and a connecting cylinder 322 connected integrally, the outer wall surface of the connecting column 312 is provided with external threads, the inner wall surface of the connecting cylinder 322 is provided with internal threads, the connecting column 312 is threadedly connected in the connecting cylinder 322, and the connecting cylinder 322 is movably arranged in the guide hole 23. The ejecting plate 311 will be in contact with the positioning disc 12 when the ejecting cap 31 is lifted, wherein the diameter of the ejecting plate 311 is greater than the diameter of the connecting column 312, which can increase the contact area of the ejecting plate 311 and the positioning disc 12, and avoid the lower surface of the positioning disc 12 from being crushed.

[0052] Further, a plurality of guide holes 23 are arranged circumferentially and spaced apart with the insertion hole 22 as the center. By adding a plurality of guide holes 23, it is convenient to install a plurality of ejecting assemblies 3, and when the positioning disc 12 is unlocked and separated, the positioning disc 12 is uniformly stressed.

[0053] Further, as shown in Figure 2 and Figure 3 , the first end surface of the positioning disc 12 is provided with a first positioning portion 121, and the positioning seat 2 is provided with a second positioning portion 24, and the first positioning portion 121 and the second positioning portion 24 are movably inserted. But after the positioning disc 12 falls to the positioning seat 2, the positioning accuracy of the two can be improved through the cooperation of the first positioning portion 121 and the second positioning portion 24.

[0054] Exemplarily, one of the first positioning portion 121 and the second positioning portion 24 is a positioning recess, and the other of the first positioning portion 121 and the second positioning portion 24 is a positioning protrusion. Through the shape adaptation of the positioning protrusion and the positioning recess, it is helpful to ensure the cooperation accuracy of the positioning disc 12 and the positioning seat 2.

[0055] Optionally, as shown in Figure 2 , in the embodiment, the first positioning portion 121 extends along the radial direction of the positioning disc 12, and the second positioning portion 24 extends along the radial direction of the insertion hole 22 towards the outer edge of the positioning seat 2. The first positioning portion 121 and the second positioning portion 24 are in isosceles trapezoidal structure in longitudinal section.

[0056] Further, the first positioning part 121 and the second positioning part 24 are both circumferentially spaced and provided with a plurality of positioning parts, and the plurality of first positioning parts 121 and the plurality of second positioning parts 24 are one-to-one corresponding. Through the matching of the plurality of first positioning parts 121 and the plurality of second positioning parts 24, the positioning accuracy can be further improved, and the positioning error can be reduced.

[0057] Further, as shown in Figure 3 , Figure 7 and Figure 8 , the positioning seat 2 is provided with an inflation hole 25, the piston 41 divides the accommodation cavity 21 into an upper cavity and a lower cavity, the inflation hole 25 communicates with the lower cavity, the guide hole 23 communicates with the upper cavity, and the locking unit 4 further includes a support cylinder 42, a plurality of balls 43, and a compression spring 44. The support cylinder 42 is coaxially connected with the insertion hole 22, the piston 41 movably sleeves the support cylinder 42, and a plurality of through holes 421 are circumferentially and spaced apart on the cylinder wall of the support cylinder 42. The balls 43 are located in the through holes 421. The compression spring 44, and the two ends of the compression spring 44 respectively abut against the piston 41 and the inner top wall of the accommodation cavity 21. In some application scenarios, when the positioning seat 2 is not inflated, the piston 41 descends in the first direction under the action of the compression spring 44, the inner wall surface of the piston 41 pushes the balls 43 inward along the radial direction of the support cylinder 42, and the plurality of balls 43 simultaneously press the pin 11 inserted into the support cylinder 42, so that the zero point positioning device with the ejection function is in a locked state, as shown in Figure 8 . In other application scenarios, when the inflation hole 25 of the positioning seat 2 is inflated, the high-pressure gas can overcome the downward pressure of the compression spring 44 to make the piston 41 ascend in the first direction, the inner wall surface of the piston 41 removes the inward pushing force on the balls 43, the ejection assembly 3 lifts the positioning disc 12 upward, the pin 11 can be easily pulled out, the plurality of balls 43 retreat into the through holes 421 of the support cylinder 42, so that the zero point positioning device with the ejection function is in an unlocked state, as shown in Figure 7 .

[0058] Further, a first annular sealing member 45 is arranged between the inner wall surface of the piston 41 and the outer wall surface of the support cylinder 42; and / or a second annular sealing member 46 is arranged between the outer wall surface of the piston 41 and the inner wall surface of the accommodation cavity 21; and / or the inner wall surface of the piston 41 is provided with an annular avoiding groove 411. The first annular sealing member 45 and the second annular sealing member 46 can be but are not limited to rubber sealing rings, which improve the air tightness of the lower cavity of the accommodation cavity 21, avoid air leakage during inflation, and affect the ascending speed of the piston 41. When the zero point positioning device with the ejection function enters the unlocked state, the piston 41 ascends in the first direction, and part of the structure of the ball 43 also enters the annular avoiding groove 411 of the piston 41 during the process that the ball 43 retreats into the through hole 421 of the support cylinder 42, so as to ensure that the ball 43 is reset.

[0059] In summary, the positioning module of the zero positioning device with the ejection function is divided into two states of unlocking and locking. When the gas in the lower cavity of the accommodating cavity 21 is depressurized, the piston 41 moves downward under the action of the compression spring 44, the piston 41 pushes the steel ball, the steel ball clamps the pin 11, at this time, the first positioning disc 12 of the positioning disc 12 and the second positioning part 24 of the positioning seat 2 are matched to realize high-standard positioning accuracy, which is the clamping state of the tray assembly 1. When the air is introduced into the lower cavity of the accommodating cavity 21, the piston 41 is pushed to overcome the force of the compression spring 44 to move upward, the steel ball retreats into the annular avoiding groove 411 of the piston 41, and the piston 41 is provided with a counterbore 412 on the upper end face, the counterbore 412 is used in cooperation with the ejection assembly 3, when the piston 41 moves upward, the ejection assembly 3 is pushed to move upward, the ejection assembly 3 pushes the positioning disc 12 to move upward, and this state is the unlocking state. In this state, the ejection assembly 3 is ejected by using the upward force of the piston 41 to eject the positioning disc 12, thereby preventing the phenomenon of the tray being clamped.

[0060] It should be noted that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A zero point positioning device with ejection function, characterized in that, The utility model relates to a positioning device for a punch press, comprising: A tray assembly (1) comprising a pin (11) and a positioning disc (12), the pin (11) is fixedly arranged on the first end face of the positioning disc (12), and the second end face of the positioning disc (12) is used for mounting a workpiece to be processed; A positioning seat (2) having a receiving cavity (21), the positioning seat (2) is provided with a insertion hole (22) and a guide hole (23), the insertion hole (22) and the guide hole (23) are communicated with the receiving cavity (21), and the pin (11) is inserted into the insertion hole (22); An ejection assembly (3) movably penetrating the guide hole (23), the ejection assembly (3) is used for lifting the positioning disc (12); A locking unit (4) arranged in the positioning seat (2) and coaxially arranged with the insertion hole (22), the locking unit (4) is used for clamping or releasing the pin (11), and the locking unit (4) comprises a piston (41), the piston (41) can be moved in a first direction and push the ejection assembly (3) partially out of the guide hole (23).

2. The zero point positioning device with ejection function according to claim 1, characterized in that, The ejection assembly (3) comprises an ejection cap (31) and an ejection seat (32), and the ejection cap (31) is threadedly connected with the ejection seat (32).

3. The zero point positioning device with ejection function according to claim 2, characterized in that, The ejection cap (31) comprises an ejection plate (311) and a connecting column (312) integrally connected, the ejection seat (32) comprises a stop portion (321) and a connecting barrel (322) integrally connected, the outer wall surface of the connecting column (312) is provided with external threads, the inner wall surface of the connecting barrel (322) is provided with internal threads, the connecting column (312) is screwed into the connecting barrel (322), and the connecting barrel (322) movably penetrates the guide hole (23).

4. The zero point positioning device with ejection function according to claim 1, characterized in that, A plurality of guide holes (23) are arranged in a circumferential direction and are spaced apart with the insertion hole (22) as the center.

5. The zero point positioning device with ejection function according to claim 1, characterized in that, The first end face of the positioning disc (12) is provided with a first positioning portion (121), the positioning seat (2) is provided with a second positioning portion (24), the first positioning portion (121) is movably inserted with the second positioning portion (24).

6. The zero point positioning device with ejection function according to claim 5, characterized in that, One of the first positioning portion (121) and the second positioning portion (24) is a positioning groove, and the other one of the first positioning portion (121) and the second positioning portion (24) is a positioning protrusion.

7. The zero point positioning device with ejection function according to claim 5, characterized in that, The first positioning portion (121) extends along the radial direction of the positioning disc (12), and the second positioning portion (24) extends along the radial direction of the insertion hole (22) and extends towards the outer edge of the positioning seat (2).

8. The zero point positioning device with ejection function according to claim 7, characterized in that, The first positioning portion (121) and the second positioning portion (24) are both arranged in a plurality of ways in a circumferential direction of the positioning disc (12), and a plurality of the first positioning portions (121) and a plurality of the second positioning portions (24) are arranged one by one.

9. The zero point positioning device with ejection function according to any one of claims 1-8, characterized in that, The positioning seat (2) is provided with an inflation hole (25), the piston (41) divides the receiving cavity (21) into an upper cavity and a lower cavity, the inflation hole (25) is communicated with the lower cavity, and the locking unit (4) further comprises A supporting cylinder (42) coaxially connected with the insertion hole (22), the piston (41) movably sleeved on the supporting cylinder (42), and a plurality of through holes (421) circumferentially and spaced apart are arranged on the cylinder wall of the supporting cylinder (42); A plurality of rolling balls (43) located in the through holes (421); A compression spring (44) with two ends respectively abutting against the piston (41) and the inner top wall of the containing cavity (21).

10. The zero point positioning device with ejection function according to claim 9, characterized in that, A first annular sealing member (45) is arranged between the inner wall surface of the piston (41) and the outer wall surface of the supporting cylinder (42); and / or A second annular sealing member (46) is arranged between the outer wall surface of the piston (41) and the inner wall surface of the containing cavity (21); and / or The inner wall surface of the piston (41) is provided with an annular avoiding groove (411).

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