Special fixture for clamping lower shell of electric actuator

Abstract

A special clamping tool for the lower shell of an electric actuator relates to an electric actuator. It comprises a disc for placing the lower shell, the lower shell having a main transmission hole above and a control hole below, the center line of the control hole and the center line of the main transmission hole not being on a straight line. It also comprises an eccentric positioning mechanism, which 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 and is connected to the rotating disc through a rotating shaft penetrating the disc. The rotating disc is connected to the connecting rod, the connecting rod is connected to the center disc, and the center disc is rotatably arranged at the bottom of the disc. The center line of the center disc and the center line of the disc are not on a straight line. The center disc is uniformly provided with three arc-shaped grooves on the torus, and the arc shape of the arc-shaped grooves is arranged from outside to inside. The present application has the advantages of accurate positioning, high repeat accuracy, avoidance of out-of-roundness and guarantee of subsequent processing reliability through centering effect.

Description

TECHNICAL FIELD

[0001] The present application relates to electric actuators, in particular to a special clamping tool for the lower housing of an electric actuator. BACKGROUND

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

[0003] In the tool design process, the main difficulty lies in the fact that the structure of the lower housing is relatively complex, and the upper and lower two outer circular 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 housing, and an eccentric tool is also used to position the outer circle of the stopper of the lower housing clamped in the lathe, which requires high repeated positioning of the tool (clamping and positioning the outer circle 9 of the stopper, which needs to manually find the eccentric position of the lower housing each time, which takes a long time). If a vertical lathe is used, the main shaft rotates, and the eccentric force of the lower housing and the tool as a whole is large, causing vibration marks on the turned surface of the part.

[0004] Moreover, when clamping the outer circle of the lower housing, the wall thickness is relatively thin, which can easily cause the circle to be lost, and cannot meet the size requirements of the part; when the eccentric position of the lower housing is not accurately found, the part will produce misalignment and misfit after processing, which reduces the reliability of the product. SUMMARY

[0005] The present application provides a special clamping tool for the lower housing of an electric actuator, which is simple in structure, convenient to position and process, and improves the reliability.

[0006] The technical scheme of the present application is as follows: 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 above and a control hole located below, the center line of the control hole and the center line of the main transmission hole are not on the same straight line;

[0007] Further comprising an eccentric positioning mechanism, the eccentric positioning mechanism comprises a hand wheel, a turntable, a connecting rod, a center disc and three transmission assemblies,

[0008] The hand wheel is arranged above the disc, the hand wheel is connected to the turntable through a rotating shaft penetrating the disc, the turntable is connected to the connecting rod, and the connecting rod is connected to the center disc,

[0009] The center disc is rotatably arranged at the bottom of the disc, the center line of the center disc and the center line of the disc are not on the same straight line, the center disc is uniformly provided with three arc-shaped grooves on the torus, and the arc shapes of the arc-shaped grooves are arranged from outside to inside;

[0010] Three transmission assemblies are arranged on the disc in a ring shape with the center of the center disc as the center, the transmission assembly comprises an L-shaped seat, a transmission rod, a push rod, a rocker and a top rod,

[0011] The L-shaped seat is arranged on the top of the disc and comprises a horizontal part and a vertical part,

[0012] The transmission rod and the arc-shaped slot correspond to each other, one end of the transmission rod is connected in the arc-shaped slot of the center disc, the other end is connected to the push rod, the push rod passes through the disc, the push rod is connected to the rocker, the middle part of the rocker is connected in the vertical part of the L-shaped seat through the rocker shaft, and the top part of the rocker is connected to the horizontally arranged top rod, so that the top rod moves horizontally in the vertical part;

[0013] The lower shell is arranged between the three L-shaped seats, and the top rods in the three transmission assemblies act to compress the lower shell, so that the center line of the control hole and the center line of the center disc are located on the same straight line.

[0014] Further comprising at least two sets of compression mechanisms connected to the disc,

[0015] The compression mechanism comprises a stand column and a pressing plate, the stand column is vertically arranged on the disc, and the pressing plate is movably connected to the stand column.

[0016] One end of the pressing plate is movably connected to the support column,

[0017] The pressing plate is provided with a through hole, the stand column is located in the through hole of the pressing plate, a nut is threadedly connected to the stand column, and the nut is located above the pressing plate.

[0018] A pair of limiting rods are arranged on the top of the disc, one limiting rod is arranged on one side of the wiring hole in the lower shell, and the other limiting rod is arranged on one side of the manual transmission hole in the lower shell.

[0019] Three support rods are detachably arranged on the circumference of the bottom of the disc.

[0020] A counterweight hole is arranged on the disc, and the counterweight hole is used for connecting a counterweight.

[0021] In the working process of the application, 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, the connecting rod drives the center disc, so that the three transmission rods move simultaneously, the transmission rods drive the push rod to act, further drive the rocker to rotate, the rocker rotates relative to the rocker shaft, and the top rod is compressed inward, the three top rods act simultaneously and have the same force, and the positioning stopper of the control hole is centered.

[0022] The application has the advantages of accurate positioning, high repeat accuracy, avoidance of out-of-roundness and guarantee of subsequent processing reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the specific embodiments or the prior art, the drawings needed to be used in the specific embodiment or prior art description will be briefly introduced. In the drawings, the parts are not necessarily drawn according to the actual proportion.

[0024] Figure 1 is a structural schematic diagram of the present application,

[0025] Figure 2 is a structural schematic diagram of the present application, Figure 1

[0026] Figure 3 is a structural schematic diagram of the present application, Figure 1

[0027] Figure 4 is a structural schematic diagram of the present application, Figure 1

[0028] Figure 5 is a structural schematic diagram of the lower shell,

[0029] Figure 6 is a sectional view of the lower shell,

[0030] Figure 7 is a working state diagram of the present application;

[0031] Fig. 1 is a disc,

[0032] 2 is a lower shell, 21 is a main transmission hole, 22 is a control hole, 23 is a wiring hole, 24 is a manual transmission hole,

[0033] 3 is an eccentric positioning mechanism, 31 is a hand wheel, 32 is a rotating disc, 33 is a connecting rod, 34 is a center disc, 340 is an arc-shaped 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 push rod, 38 is a rocker, 380 is a rocker shaft, 39 is a top rod,

[0034] 4 is a pressing mechanism, 41 is a vertical column, 42 is a pressing plate, 420 is a through hole, 43 is a supporting column, 44 is a nut,

[0035] 51 is a limiting rod one, 52 is a limiting rod two,

[0036] 6 is a supporting rod, 7 is a counterweight hole, 8 is a chuck jaw, 9 is a positioning stopper outer circle. Specific embodiments

[0037] ​​​Embodiments of the present application are described below in the detailed description and illustrated in the accompanying drawings by using examples, which are exemplary only and are not intended to limit the present application, with the same or similar reference numerals used throughout the various drawings denote the same or similar elements or elements having the same or similar functions.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] As shown in the present application, Figures 1-7 A special clamping tool for the lower shell of an electric actuator includes a disc 1 for placing a lower shell 2, the lower shell having a main transmission hole 21 above and a control hole 22 below, the center line of the control hole 22 and the center line of the main transmission hole 21 are not on the same straight line;

[0041] It also includes an eccentric positioning mechanism 3, which includes a hand wheel 31, a rotating disc 32, a connecting rod 33, a center disc 34, and three transmission assemblies,

[0042] The hand wheel 31 is arranged above the disc 1, the hand wheel 31 is connected to the rotating disc 32 through a rotating shaft passing through the disc 1, the rotating disc 32 is connected to the connecting rod 33, and the connecting rod 33 is connected to the center disc 34,

[0043] The center disc 34 is rotatably arranged at the bottom of the disc 1, the center line of the center disc and the center line of the disc are not on the same straight line, the center disc 34 is uniformly arranged with three arc grooves 340 on the torus, and the arc shape of the arc grooves is arranged from outside to inside, so that the transmission rod is displaced when the center disc rotates;

[0044] Three transmission assemblies are arranged on the disc in a ring shape with the center of the center disc as the center, the transmission assembly comprises an L-shaped seat 35, a transmission rod 36, a push rod 37, a rocker 38 and a top rod 39,

[0045] The L-shaped seat 35 is arranged on the top of the disc 1 and comprises a horizontal part 351 and a vertical part 352,

[0046] The transmission rod 36 and the arc-shaped slot 340 correspond to each other, one end of the transmission rod 36 is connected in the arc-shaped slot 340 of the center disc, the other end is connected to the push rod 37, the push rod 37 passes through the disc 1, the push rod 37 is connected to the rocker 38, the middle part of the rocker 38 is connected in the vertical part 352 of the L-shaped seat through a rocker shaft 380, and the top part of the rocker is connected to the horizontally arranged top rod 39, so that the top rod moves horizontally in the vertical part;

[0047] The lower shell 2 is arranged between the three L-shaped seats 35, and the top rods in the three transmission assemblies act to compress the lower shell, so that the center line of the control hole and the center line of the center disc are located on the same straight line.

[0048] In the working process of the centering device, 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, the connecting rod drives the center disc, the three transmission rods are simultaneously moved, the push rod is driven to act, the rocker is further driven to rotate, the rocker rotates relative to the rocker shaft, the top rod is compressed inward, the three top rods simultaneously act and have the same force, and the positioning stopper outer circle 9 at the control hole is centered.

[0049] The centering device has the advantages of accurate positioning, high repeat precision, avoidance of out-of-roundness and guarantee of subsequent machining reliability.

[0050] After the control hole is centered, the center line of the main transmission hole and the center line of the disc are located on the same straight line.

[0051] The centering device further comprises at least two sets of compression mechanisms 4 connected to the disc 1,

[0052] The compression mechanism 4 comprises a stand column 41 and a pressing plate 42, the stand column is vertically arranged on the disc, and the pressing plate is movably connected to the stand column.

[0053] The pressing plate is arranged, so that the end face of the lower shell can be compressed, and the machining reliability is guaranteed.

[0054] One end of the pressing plate is movably connected to a supporting column 43,

[0055] The pressing plate 42 is provided with a through hole 420, the stand column 41 is located in the through hole 420 of the pressing plate, a nut 44 is threadedly connected to the stand column, and the nut is located above the pressing plate.

[0056] Supporting column is arranged for supporting the pressing plate, and the pressing plate is rotatably connected to the stand column through the nut, so that the pressing plate can be reliably pressed.

[0057] The top of the disc is provided with a pair of limiting rods, one limiting rod (i.e. limiting rod one 51) is arranged on one side of the wiring hole 23 in the lower shell, and the other limiting rod (i.e. limiting rod two 52) is arranged on one side of the manual transmission hole 24 in the lower shell.

[0058] The limiting rods are arranged to limit the lower shell.

[0059] The bottom of the disc 1 is detachably provided with three supporting rods 6 on the circumference.

[0060] When the tooling is offline (i.e. not in working state), the tooling is supported to avoid damage to the lower structure of the tooling (such as transmission rod, push rod, etc.) under force; at the same time, the supporting rods arranged at different positions can also play a counterweight role. In application, the bottom of the disc is connected to the chuck jaw 8 for clamping.

[0061] The disc 1 is provided with a counterweight hole 7 for connecting a counterweight block.

[0062] The counterweight hole is reserved, and appropriate counterweight blocks are selected according to the blank.

[0063] The balance of the weight of the part and the weight of the tooling is fully considered to reduce the influence of the eccentric force vibration of the main shaft of the vertical lathe on the machining surface of the part during machining.

[0064] For the content disclosed in the present case, the following points need to be explained:

[0065] (1) The embodiment disclosed in the present case only relates to the structure involved in the disclosed embodiment, and other structures can refer to the usual design.

[0066] (2) In the case of no conflict, the embodiments disclosed in the present case and the features in the embodiments can be combined to obtain new embodiments.

[0067] The above is only a specific embodiment disclosed in the present case, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A dedicated clamping fixture for the lower housing of an electric actuator, comprising a disc for placing the lower housing, the lower housing having a main drive hole located above and a control hole located below, wherein the center line of the control hole and the center line of the main drive hole are not on a straight line; characterized in that, It also includes an eccentric positioning mechanism, which comprises a handwheel, a turntable, a connecting rod, a center plate, and three transmission components. The handwheel is located above the disc, and the handwheel is connected to the disc via a rotating shaft. The disc is connected to a connecting rod, and the connecting rod is connected to a central disc. The central disk is rotatably mounted on the bottom of the disc. The center line of the central disk and the center line of the disc are not on the same straight line. The central disk has three arc-shaped grooves evenly distributed on its annular surface. The arc shape of the arc grooves is set from the outside to the inside. Three transmission components are evenly distributed in a ring on the central disk, with the center of the central disk as the center. Each transmission component includes an L-shaped seat, a transmission rod, a lever, a rocker arm, and a push rod. The L-shaped seat is located on the top of the disk and includes a horizontal part and a vertical part. The transmission rod and the arc-shaped groove correspond one-to-one. One end of the transmission rod is connected to the arc-shaped groove of the central disk, and the other end is connected to the lever. The lever passes through the disk and is connected to the rocker arm. The middle part of the rocker arm is connected to the vertical part of the L-shaped seat through the rocker arm shaft. The top of the rocker arm is connected to a horizontally set top rod, so that the top rod can move horizontally within the vertical part. The lower housing is located between three L-shaped seats. The push rods in the three transmission components press the lower housing together, so that the center line of the control hole and the center line of the center plate are on the same straight line.

2. The special clamping fixture for the lower housing of an 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 includes a column and a pressure plate. The column is vertically mounted on the disc, and the pressure plate is movably connected to the column.

3. The special clamping fixture for the lower housing of an electric actuator according to claim 2, characterized in that, It also includes support columns, which are vertically mounted on the disk. One end of the pressure plate is movably connected to the support column. The pressure plate has a through hole, the column is located in the through hole of the pressure plate, and a nut is threaded onto the column, with the nut located above the pressure plate.

4. A special clamping fixture for the lower housing of an electric actuator according to claim 1, characterized in that, The top of the disc is provided with a pair of limiting rods. One limiting rod is used to be located on one side of the wiring hole in the lower housing, and the other limiting rod is used to be located on one side of the manual transmission hole in the lower housing.

5. A special clamping fixture for the lower housing of an electric actuator according to claim 1, characterized in that, The bottom of the disk is detachably equipped with three support rods on its circumference.

6. A special clamping fixture for the lower housing of an electric actuator according to claim 1, characterized in that, The disk is provided with a counterweight hole, which is used to connect a counterweight block.

Images