Special clamping tool for lower shell of electric actuating mechanism

Abstract

The invention discloses a special clamping tool for a lower shell of an electric actuating mechanism, and relates to the electric actuating mechanism. Comprising a disc, the disc is used for containing a lower shell, the lower shell is provided with a main transmission hole located in the upper portion and a control hole located in the lower portion, and the center line of the control hole and the center line of the main transmission hole are not located on the same straight line; the eccentric positioning mechanism comprises a hand wheel, a rotating disc, a connecting rod, a center disc and three transmission assemblies, the hand wheel is arranged above the disc, the hand wheel penetrates through the disc through a rotating shaft to be connected with the rotating disc, the rotating disc is connected with the connecting rod, the connecting rod is connected with the center disc, and the center disc is rotationally and movably arranged at the bottom of the disc; the center line of the center disc and the center line of the disc are not located on the same straight line, three arc-shaped grooves are evenly distributed in the annular face of the center disc, and the arcs of the arc-shaped grooves are arranged from outside to inside. Through the centering effect, positioning is accurate, the repeated precision is high, out-of-round is avoided, and the subsequent machining reliability is guaranteed.

Description

Technical Field

[0001] The invention relates to an electric actuator, in particular to a special clamping tool for a lower shell of the electric actuator. Background Art

[0002] The lower housing is the main load-bearing part of the electric actuator (2SQ8T). The lower housing is divided into four core parts (namely the main transmission hole, control hole, manual transmission hole and wiring hole), which are used to carry the main transmission components, control components, manual transmission components and wiring components respectively.

[0003] During the tooling design process, the main difficulty lies in the complex structure of the lower shell, and the upper and lower outer cylindrical surfaces of the part (i.e., the main transmission hole and the control hole) are not concentric. The conventional processing method is to use a horizontal or vertical lathe to process the lower shell, and an eccentric tool is also used to clamp the outer circle of the positioning stop of the lower shell on the lathe, which has high requirements for repeated positioning of the tool (clamping the outer circle of the positioning stop 9, and it is necessary to manually find the eccentric position of the lower shell each time, which takes a long time). If vertical lathe processing is used, the spindle rotates, and the overall eccentric force of the lower shell and the tool is large, resulting in vibration marks on the turned surface of the part.

[0004] Moreover, when clamping the outer circle of the lower shell, it is easy to cause out-of-roundness due to the thin wall thickness, and the part size requirements cannot be met; when the eccentric position of the lower shell is not found accurately, the parts will have misaligned edges and seams when matched with other parts after processing, reducing product reliability. Summary of the invention

[0005] In view of the above problems, the present invention provides a special clamping tool for the lower housing of an electric actuator which has a simple structure, is convenient for positioning and processing, and has improved reliability.

[0006] The technical solution of the present invention is: a special clamping tool for the lower housing of an electric actuator, comprising a disc, the disc is used to place the lower housing, the lower housing has a main transmission hole located at the top and a control hole located at the bottom, and the center line of the control hole and the center line of the main transmission hole are not on a straight line; It also includes an eccentric positioning mechanism, which includes a hand wheel, a rotating disk, a connecting rod, a center disk and three transmission components. The hand wheel is arranged above the disc, the hand wheel passes through the disc through a rotating shaft and is connected to the rotating disc, the rotating disc is connected to a connecting rod, and the connecting rod is connected to the center disc. The central disk is rotatably arranged at the bottom of the disk, the center line of the central disk and the center line of the disk are not in a straight line, and three arc grooves are evenly distributed on the annular surface of the central disk, and the arc of the arc groove is arranged from the outside to the inside; The three transmission components are evenly distributed on the disc in a ring shape with the center of the central disc as the center. The transmission components include an L-shaped seat, a transmission rod, a shift rod, a rocker and a push rod. The L-shaped seat is arranged on the top of the disc and includes a horizontal part and a vertical part. The transmission rod and the arc groove correspond to each other one by one, one end of the transmission rod is connected to the arc groove of the center disk, and the other end is connected to the lever, the lever passes through the disk, the lever is connected to the rocker, the middle part of the rocker is connected to the vertical part of the L-shaped seat through the rocker shaft, and the top of the rocker is connected to the horizontally arranged top rod, so that the top rod moves horizontally in the vertical part; The lower shell is arranged between the three L-shaped seats, and the push rods in the three transmission assemblies press the lower shell tightly so that the center line of the control hole and the center line of the center disk are located in the same straight line.

[0007] It also includes at least two sets of clamping mechanisms, which are connected to the disc. The clamping mechanism comprises a column and a pressing plate, wherein the column is vertically arranged on the disc, and the pressing plate is movably connected to the column.

[0008] One end of the pressing plate is movably connected to the supporting column. The pressing plate is provided with a through hole, the column is located in the through hole of the pressing plate, a nut is threadedly connected to the column, and the nut is located above the pressing plate.

[0009] A pair of limiting rods are arranged on the top of the disc, one limiting rod is used to be arranged on one side of the wiring hole in the lower shell, and the other limiting rod is used to be arranged on one side of the manual transmission hole in the lower shell.

[0010] The bottom of the disc is detachably provided with three supporting rods on the circumference.

[0011] The disc is provided with a counterweight hole, and the counterweight hole is used to connect a counterweight block.

[0012] When the present invention is in operation, the lower shell is placed between the three L-shaped seats of the disc. At this time, the hand wheel is rotated to drive the connecting rod, and the connecting rod drives the center disc, so that the three transmission rods move at the same time. The transmission rod drives the lever to move, which further drives the rocker to rotate. The rocker rotates relative to the rocker shaft, prompting the push rod to be pressed inward. The three push rods move at the same time and have the same force, so as to play a role in centering the outer circle of the positioning stop at the control hole.

[0013] The present invention has accurate positioning and high repetition accuracy through the centering effect, avoids loss of roundness, and ensures the reliability of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the specific implementation or the prior art description. In the drawings, each part is not necessarily drawn according to the actual scale.

[0015] Figure 1 It is a structural schematic diagram of the present invention, Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure, Figure 3 yes Figure 1 A top view of Figure 4 yes Figure 1 Bottom view of Figure 5 It is a schematic diagram of the structure of the lower shell. Figure 6 is a cross-sectional view of the lower shell, Figure 7 It is a working state diagram of the present invention; In the figure, 1 is a disk. 2 is the lower shell, 21 is the main transmission hole, 22 is the control hole, 23 is the wiring hole, 24 is the manual transmission hole, 3 is an eccentric positioning mechanism, 31 is a hand wheel, 32 is a rotating disk, 33 is a connecting rod, 34 is a center disk, 340 is an arc groove, 35 is an L-shaped seat, 351 is a horizontal part, 352 is a vertical part, 36 is a transmission rod, 37 is a lever, 38 is a rocker, 380 is a rocker shaft, 39 is a top rod, 4 is a clamping mechanism, 41 is a column, 42 is a pressure plate, 420 is a perforation, 43 is a support column, 44 is a nut, 51 is the limit rod 1, 52 is the limit rod 2, 6 is a support rod, 7 is a counterweight hole, 8 is a chuck claw, and 9 is an outer circle of a positioning stop. DETAILED DESCRIPTION

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The present invention Figure 1-7 As shown, a special clamping tool for the lower housing of an electric actuator includes a disc 1, the disc is used to place a lower housing 2, the lower housing has a main transmission hole 21 located at the top and a control hole 22 located at the bottom, and the center line of the control hole 22 and the center line of the main transmission hole 21 are not in a straight line; It also includes an eccentric positioning mechanism 3, which includes a hand wheel 31, a rotating disk 32, a connecting rod 33, a center disk 34 and three transmission components. The hand wheel 31 is arranged above the disc 1, and the hand wheel 31 passes through the disc 1 through a rotating shaft to connect to the rotating disc 32, the rotating disc 32 is connected to the connecting rod 33, and the connecting rod 33 is connected to the center disc 34. The center disk 34 is rotatably arranged at the bottom of the disk 1. The center line of the center disk and the center line of the disk are not in a straight line. The center disk 34 is evenly provided with three arc grooves 340 on the annular surface. The arc shape of the arc groove is arranged from the outside to the inside. In this way, when the center disk rotates, the transmission rod is displaced. The three transmission components are evenly distributed on the disk in a ring shape with the center of the central disk as the center. The transmission components include an L-shaped seat 35, a transmission rod 36, a lever 37, a rocker 38 and a push rod 39. The L-shaped seat 35 is disposed on the top of the disc 1 and includes a horizontal portion 351 and a vertical portion 352. The transmission rod 36 and the arc groove 340 correspond to each other one by one. One end of the transmission rod 36 is connected to the arc groove 340 of the center disk, and the other end is connected to the lever 37. The lever 37 passes through the disk 1. The lever 37 is connected to the rocker 38. The middle part of the rocker 38 is connected to the vertical part 352 of the L-shaped seat through the rocker shaft 380. The top of the rocker is connected to the horizontally arranged top rod 39, so that the top rod moves horizontally in the vertical part. The lower housing 2 is arranged between the three L-shaped seats 35, and the push rods in the three transmission components press the lower housing tightly so that the center line of the control hole and the center line of the center disk are located in the same straight line.

[0020] During operation, the present invention places the lower shell between the three L-shaped seats of the disc. At this time, the hand wheel is rotated to drive the connecting rod, which drives the center disc, so that the three transmission rods move simultaneously. The transmission rod drives the lever to move, which further drives the rocker to rotate. The rocker rotates relative to the rocker shaft, prompting the push rod to be pressed inward. The three push rods move simultaneously with the same force, which plays a role in centering the outer circle 9 of the positioning stop at the control hole.

[0021] The present invention has accurate positioning and high repetition accuracy through the centering effect, avoids loss of roundness, and ensures the reliability of subsequent processing.

[0022] By centering the control hole, the center line of the main transmission hole and the center line of the disc are located in the same straight line.

[0023] It also includes at least two sets of clamping mechanisms 4, which are connected to the disc 1. The clamping mechanism 4 includes a column 41 and a pressing plate 42. The column is vertically arranged on the disc, and the pressing plate is movably connected to the column.

[0024] By setting the pressing plate, it is convenient to press the end surface of the lower shell body, thereby ensuring processing reliability.

[0025] One end of the pressing plate is movably connected to the supporting column 43. The pressing plate 42 is provided with a through hole 420 , and the column 41 is located in the through hole 420 of the pressing plate. A nut 44 is threadedly connected to the column, and the nut is located above the pressing plate.

[0026] A support column is provided to support the pressing plate, and then is rotatably connected to the column through a nut, so as to facilitate reliable pressing action of the pressing plate.

[0027] A pair of limit rods are provided on the top of the disc, one limit rod (i.e., limit rod 1 51) is used to be provided on one side of the wiring hole 23 in the lower shell, and the other limit rod (i.e., limit rod 2 52) is used to be provided on one side of the manual transmission hole 24 in the lower shell.

[0028] A limiting rod is provided to limit the lower shell body.

[0029] The bottom of the disc 1 is detachably provided with three support rods 6 on the circumference.

[0030] When the tooling is cached offline (i.e. not in working state), the tooling is supported to prevent the lower structure of the tooling (such as transmission rod, lever, etc.) from being damaged by force; at the same time, supporting rods are arranged at different positions to also play a counterweight role. In application, the bottom of the disc is connected to the chuck claw 8 for clamping.

[0031] The disc 1 is provided with a counterweight hole 7, and the counterweight hole is used to connect a counterweight block.

[0032] Reserve counterweight holes and select appropriate counterweight blocks according to changes in the blank.

[0033] Fully consider the balance between part weight and tooling weight to reduce the impact of eccentric force vibration of the vertical lathe spindle on the part processing surface during processing.

[0034] Regarding the contents disclosed in this case, there are a few points that need to be explained: (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design; (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to obtain new embodiments; The above are only specific implementation methods disclosed in this case, but the protection scope of the present disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. A special clamping tool for the lower housing of an electric actuator, comprising a disc, the disc is used to place the lower housing, the lower housing has a main transmission hole located at the top and a control hole located at the bottom, the center line of the control hole and the center line of the main transmission hole are not in a straight line; characterized in that: It also includes an eccentric positioning mechanism, which includes a hand wheel, a rotating disk, a connecting rod, a center disk and three transmission components. The hand wheel is arranged above the disc, the hand wheel passes through the disc through a rotating shaft and is connected to the rotating disc, the rotating disc is connected to a connecting rod, and the connecting rod is connected to the center disc. The central disk is rotatably arranged at the bottom of the disk, the center line of the central disk and the center line of the disk are not in a straight line, and three arc grooves are evenly distributed on the annular surface of the central disk, and the arc of the arc groove is arranged from the outside to the inside; The three transmission components are evenly distributed on the disc in a ring shape with the center of the central disc as the center. The transmission components include an L-shaped seat, a transmission rod, a shift rod, a rocker and a push rod. The L-shaped seat is arranged on the top of the disc and includes a horizontal part and a vertical part. The transmission rod and the arc groove correspond to each other one by one, one end of the transmission rod is connected to the arc groove of the center disk, and the other end is connected to the lever, the lever passes through the disk, the lever is connected to the rocker, the middle part of the rocker is connected to the vertical part of the L-shaped seat through the rocker shaft, and the top of the rocker is connected to the horizontally arranged top rod, so that the top rod moves horizontally in the vertical part; The lower shell is arranged between the three L-shaped seats, and the push rods in the three transmission assemblies press the lower shell tightly so that the center line of the control hole and the center line of the center disk are located in the same straight line.

2. The special clamping tool for the lower housing of the electric actuator according to claim 1, characterized in that: It also includes at least two sets of clamping mechanisms, which are connected to the disc. The clamping mechanism comprises a column and a pressing plate, wherein the column is vertically arranged on the disc, and the pressing plate is movably connected to the column.

3. The special clamping tool for the lower housing of the electric actuator according to claim 2, characterized in that: It also includes a support column, which is vertically arranged on the disc. One end of the pressing plate is movably connected to the supporting column. The pressing plate is provided with a through hole, the column is located in the through hole of the pressing plate, a nut is threadedly connected to the column, and the nut is located above the pressing plate.

4. The special clamping tool for the lower housing of an electric actuator according to claim 1, characterized in that: A pair of limiting rods are arranged on the top of the disc, one limiting rod is used to be arranged on one side of the wiring hole in the lower shell, and the other limiting rod is used to be arranged on one side of the manual transmission hole in the lower shell.

5. The special clamping tool for the lower housing of an electric actuator according to claim 1, characterized in that: The bottom of the disc is detachably provided with three supporting rods on the circumference.

6. The special clamping tool for the lower housing of the electric actuator according to claim 1, characterized in that: The disc is provided with a counterweight hole, and the counterweight hole is used to connect a counterweight block.

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