An automatic assembly production line and method for an electric push rod

Abstract

The present invention provides an automatic assembly production line and method for an electric push rod. The production line includes: a housing clamping unit; a keyway correction unit disposed above the housing clamping unit; and an inner core installation unit disposed above the keyway correction unit. The keyway correction unit includes: a lifting platform for detecting the position of the key on the surface of the inner core; and a lowering platform for detecting the position of the inner groove in the housing. Through the contact of the guide beads with the inside of the outer shell, when the detection block passes through the keyway b, the locking spring on the side of the detection block pushes the detection block into the keyway b. During the subsequent rotation of the lowering platform, the outer shell will rotate together with the lowering platform until it contacts during one cycle of rotation, so as to achieve the ability to record and track the keyway b in a timely manner when encountering the keyway b, further improving the detection accuracy and installation accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of electric push rod assembly, and in particular to an automatic assembly production line and method for an electric push rod. Background Art

[0002] An electric push rod is a power-driven device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod. It can be used as an actuating machine in simple or complex technological processes. During the assembly process of an electric push rod, workers need to first align the keys protruding from the surface of the inner core of the electric push rod with the grooves reserved in the inner cavity of the outer shell of the electric push rod and fully insert the inner core into the outer shell to prevent relative rotation between the installed outer shell and the inner core during operation. Then, the battery cell body is successively fixed inside the housing, and finally, a rear cover is put on the outside of the battery cell.

[0003] Chinese Patent CN 110040464 A discloses an installation structure of an electric push rod for an electric deviation correction device. It includes a centering idler roller group, a centering idler roller bracket, and an electric push rod. The electric push rod is arranged parallel to the centering idler roller group. A square head is provided at the shaft end of the rotating output shaft of the centering idler roller group. A rotating arm is connected to the end of the telescopic rod of the electric push rod. A square hole matching the square head is provided on the rotating arm. The rotating arm is sleeved on the square head of the rotating output shaft through the square hole on it. The telescopic rod of the electric push rod is extended and retracted to drive the rotating arm to rotate the rotating output shaft, thereby controlling the rotation of the centering idler roller group.

[0004] However, the technical solution and the prior art have the following defects:

[0005] 1. Each time the battery cell of the electric push rod is inserted into the housing, the keys reserved outside the battery cell need to be aligned with the inside of the housing. Since the housing is generally opaque, even if it is already aligned when the battery cell is inserted into the housing, a small-angle rotation still occurs during insertion, resulting in misalignment between the keys outside the battery cell and the grooves inside the housing, affecting the installation accuracy.

[0006] 2. When tightening after the battery cell is inserted into the housing, since the middle bolt and the tail bolt outside the battery cell are in a series form along the reserved wire, when the middle bolt is rotated for tightening, the upper bolt will swing repeatedly, causing the wire ends inside the battery cell to loosen, posing a certain safety hazard. Summary of the Invention

[0007] The object of the present invention is to provide an automatic assembly production line for electric push rods in view of the deficiencies of the prior art. Before inserting the inner core into the outer shell, the grooves reserved inside the outer shell and the keys reserved outside the inner core are automatically adjusted and aligned, effectively preventing the situation of inaccurate installation of the inner core, with high installation accuracy, capable of synchronously adjusting multiple groups of inner cores and outer shells at one time, and high installation efficiency. In addition, during the installation of the electric push rod, the middle bolts and the tail bolts are installed in layers, ensuring that the two groups of bolts do not interfere with each other during the installation process and ensuring safe use.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An automatic assembly production line for electric push rods, comprising:

[0010] A housing clamping unit;

[0011] A key groove correction unit, which is arranged above the housing clamping unit;

[0012] An inner core installation unit, which is arranged above the key groove correction unit;

[0013] The key groove correction unit includes:

[0014] A lifting platform for detecting the position of the key on the surface of the inner core; and

[0015] A lowering platform for detecting the position of the groove inside the housing;

[0016] During operation, the housing is successively placed on the housing clamping unit, the inner core is successively placed on the inner core clamping unit, the key groove correction unit moves to the position between the housing and the inner core, and the position of the key outside the inner core and the position of the groove inside the housing are adjusted to be vertically corresponding through the rotating lifting platform and lowering platform in sequence, and the inner core installation unit inserts the corresponding inner core into the housing and performs bolt tightening work.

[0017] As an improvement, the housing clamping unit includes:

[0018] A support seat;

[0019] A pre-tightening plate, which is slidably inserted inside the support seat;

[0020] A first retraction groove is provided inside the support seat and outside the pre-tightening plate;

[0021] One end of the pre-tightening plate is connected with a connecting rod;

[0022] A shifting rod is connected to the side of the connecting rod;

[0023] The lower end of the shifting rod is connected with a pushing plate inside the support seat;

[0024] A first telescopic sleeve is connected to the side of the push plate;

[0025] A preloading spring is inserted into the first telescopic sleeve.

[0026] As an improvement, the housing clamping unit further includes:

[0027] An adjusting mechanism, which is arranged on the side of the lever;

[0028] The adjusting mechanism includes: a middle convex plate;

[0029] A low convex plate and a high convex plate are sequentially transitioned on the side of the middle convex plate;

[0030] One end of the middle convex plate is connected to an adjusting shaft;

[0031] A reversing gear is sleeved outside the adjusting shaft.

[0032] As an improvement, the keyway correction unit includes:

[0033] A cross beam;

[0034] Multiple support platforms are connected to the side of the cross beam;

[0035] A central control frame is rotatably connected inside the support platform;

[0036] A receiving groove is provided inside the central control frame;

[0037] A turbine is provided outside the central control frame and inside the support platform.

[0038] As an improvement, the upper lifting platform includes:

[0039] A key detection rod;

[0040] The key detection rod is arranged at the eccentric position of the upper end of the upper lifting platform, and the diameter presented by the rotation of the key detection rod is equal to the diameter of the inner core;

[0041] A first return spring is sleeved outside the upper lifting platform and inside the receiving groove;

[0042] A second telescopic sleeve is connected to the lower end of the upper lifting platform.

[0043] As an improvement, the lower lifting platform includes:

[0044] A lifting block;

[0045] A second guide groove is provided inside the lifting block;

[0046] A limiting groove is provided in the upper part of the second guide groove and inside the lifting block;

[0047] A detection block is slidably inserted into the interior of the second guide groove;

[0048] A second return spring is sleeved outside the lifting block and outside the receiving groove.

[0049] As an improvement, a locking spring is connected to the side of the detection block and inside the second guide groove;

[0050] A stop baffle is connected to the upper end of the detection block and inside the limit groove;

[0051] An inclined portion is provided on the side of the detection block and outside the lifting block;

[0052] A guide bead is inserted into the side of the detection block and above the inclined portion.

[0053] As an improvement, the inner core installation unit includes: a lifting adjustment rail;

[0054] A middle bolt storage tray, the rear end of the middle bolt storage tray is slidably inserted into the interior of the lifting adjustment rail;

[0055] An adjustment pin is connected to the upper end of the middle bolt storage tray;

[0056] An inclined surface is provided at the upper end of the adjustment pin;

[0057] Above the middle bolt storage tray, an upper bolt storage tray is connected by a guide rod slidably inserted into its interior;

[0058] A limit block is sleeved outside the guide rod;

[0059] A lifting spring is connected to the outside of the guide rod and below the limit block.

[0060] As an improvement, a second retreat groove is provided inside the upper bolt storage tray;

[0061] A pre-baffle is slidably inserted into the interior of the second retreat groove;

[0062] A propulsion groove adapted to the upper end of the adjustment pin is provided inside the pre-baffle;

[0063] A third return spring is connected to the side of the pre-baffle and inside the upper bolt storage tray.

[0064] Another object of the present invention is to provide a method for assembling an electric push rod using an automatic assembly production line for electric push rods in view of the deficiencies of the prior art, including the following steps:

[0065] Step 1, housing placement process: Place the housing on the upper part of the support seat in sequence, making the housing placed vertically;

[0066] Step 2, inner groove detection process: The support platform synchronously drives the upper lifting platform and the lower lifting platform to move to the position between the inner core and the outer shell, and synchronously rotates to adjust the groove inside the outer shell and the key on the outer side of the inner core to be vertically aligned, and then the support platform is reset.

[0067] Step 3, inner core insertion process: The middle bolt storage tray moves downward along the lifting adjustment rail to send the inner core into the outer shell.

[0068] Step 4, middle bolt tightening process: After the inner core is completely inserted into the outer shell, rotate the middle bolt so that the middle bolt tightly fastens the inner core and the outer shell as a whole; Step 5, tail bolt tightening process: Push the upper bolt storage tray downward so that the upper bolt abuts against the tail port of the shell to be closed, and rotate the tail screw to close the shell and the inner core as a whole;

[0069] Step 6, discharging process, rotate the adjustment mechanism so that the two pre-tightening plates are completely separated, and the electric push rod after assembly falls off along the support seat.

[0070] The beneficial effects of the present invention are as follows:

[0071] (1) In the present invention, the turbine drives the central control frame to rotate, and the central control frame drives the key detection rod to rotate along the inner core through the upper lifting platform. When the key detection rod rotates one circle along key a at the initial stage and touches key a again, stop rotating the worm. At this time, the detection work of one cycle is completed, and the corresponding key slot b of the outer shell is exactly below key a. The specific working principle is as follows, so as to achieve automatic adjustment and alignment of the reserved groove inside the outer shell and the reserved key outside the inner core, effectively preventing inaccurate installation of the inner core.

[0072] (2) In the present invention, the inclined part gradually pushes the detection block to compress the locking spring and move along the second guide groove under the resistance of the upper mouth of the outer shell. After the detection block enters the inner part of the outer shell, it always abuts against the inner edge of the outer shell under the action of the locking spring. When the lower lifting platform rotates as a whole along the inside of the outer shell, it contacts the inside of the outer shell through the guide beads. When the detection block passes through the key slot b, the locking spring on the side of the detection block pushes the detection block into the key slot b. During the subsequent rotation of the lower lifting platform, the outer shell will rotate together with the lower lifting platform until one cycle of rotation work is completed, so as to achieve the ability to record and track the key slot b in time when encountering the key slot b, further improving the detection accuracy and installation accuracy.

[0073] (3) The present invention pushes the upper bolt storage tray downward, and the upper bolt storage tray drives the upper bolt to move downward and gradually compresses the lifting spring until the propulsion groove in the upper bolt storage tray is sleeved on the outside of the adjustment pin. At this time, the upper bolt and the closed opening of the shell are at the same horizontal height, and the limit block is gradually inserted into the propulsion groove and drives the guide rod to compress the third return spring along the second retreat groove, so that the upper bolt passes through the upper bolt storage tray, thereby achieving the effect of layered installation of the middle bolt and the tail bolt, ensuring that the two groups of bolts do not interfere with each other during the installation process, and ensuring safe use.

[0074] (4) The present invention switches the original high-raised plate against the side of the push plate to a low-raised plate against the side of the push plate by rotating the adjustment shaft. At this time, the pre-tightening plate is separated from the shell and completely enters the first retreat groove. The assembled electric push rod is separated from the support seat and completes the automatic unloading work, thereby achieving the effect of automatic unloading.

[0075] In summary, the present invention has the advantages of high installation precision and high installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0077] Figure 2 This is a diagram showing the matching relationship between the support seat and the preload plate of the present invention;

[0078] Figure 3 This is a diagram showing the placement of the housing of the present invention on the push rod;

[0079] Figure 4 This is a schematic diagram of the structure of the regulating mechanism of the present invention;

[0080] Figure 5 A diagram showing the coordination relationship between the raised plate and the shift lever in the present invention;

[0081] Figure 6 Schematic diagram of the structure of the keyway correction unit of the present invention;

[0082] Figure 7 This is a working state diagram of the keyway correction unit of the present invention;

[0083] Figure 8 This is a motion state diagram of the lifting platform in the key groove process inside the shell of the present invention;

[0084] Figure 9 The diagram of the matching relationship between the worm and the turbine of the present invention is as follows

[0085] Figure 10 Schematic diagram of the internal structure of the keyway correction unit of the present invention;

[0086] Figure 11 This is a schematic diagram of the inner core installation unit structure of the present invention;

[0087] Figure 12 This is the process flow chart of the present invention.

[0088] In the figure, 1 is the housing clamping unit; 101 is the support base; 1011 is the first retraction groove; 102 is the pre-tightening plate; 1021 is the connecting rod; 1012 is the first guide groove; 1013 is the limiting plate; 103 is the shifting lever; 1031 is the pushing plate; 1032 is the first telescopic sleeve; 10321 is the pre-tightening spring; 104 is the adjusting mechanism; 1041 is the middle convex plate; 1042 is the reversing gear; 1043 is the adjusting shaft; 10411 is the low convex plate; 10412 is the high convex plate;

[0089] 2 is the keyway correction unit; 201 is the driving cylinder; 202 is the cross beam; 203 is the support table; 2031 is the central control frame; 20311 is the accommodating groove; 2032 is the turbine; 204 is the upper lifting table; 2041 is the key detection rod; 2042 is the first return spring; 2043 is the second telescopic sleeve; 205 is the lower lifting table; 2051 is the lifting block; 20511 is the second guide groove; 20512 is the limiting groove; 20513 is the detection block; 205131 is the inclined part; 205132 is the guiding bead; 205133 is the stop baffle; 20514 is the locking spring; 2052 is the second return spring; 206 is the worm; 207 is the adjusting rod; 2071 is the convex part;

[0090] 3 is the inner core installation unit; 301 is the lifting and adjusting rail; 302 is the middle bolt storage tray; 3021 is the adjusting pin; 303 is the upper bolt storage tray; 3030 is the second retraction groove; 30301 is the pre-baffle; 303011 is the propulsion groove; 30302 is the third return spring; 3031 is the guide rod; 3032 is the limiting block; 304 is the lifting spring. Specific embodiments

[0091] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0092] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plural" means two or more unless otherwise specifically defined.

[0093] Embodiment 1

[0094] As Figure 1 shown, this embodiment provides an automatic assembly production line for electric push rods,

[0095] An automatic assembly production line for electric push rods includes:

[0096] A housing clamping unit 1;

[0097] A keyway correction unit 2, and the keyway correction unit 2 is arranged above the housing clamping unit 1;

[0098] An inner core installation unit 3, and the inner core installation unit 3 is arranged above the keyway correction unit 2;

[0099] The keyway correction unit 2 includes:

[0100] A lifting platform 204 for detecting the key position on the surface of the inner core; and

[0101] A lowering platform 205 for detecting the position of the inner groove in the housing;

[0102] During operation, the housing is successively placed on the housing clamping unit 1, the inner core is successively placed on the inner core clamping unit 3, the keyway correction unit 2 moves to the position between the housing and the inner core, and the key position outside the inner core and the groove position inside the housing are adjusted to be vertically corresponding through the rotating lifting platform 204 and lowering platform 205 in sequence, and the inner core installation unit 3 inserts the corresponding inner core into the housing and performs bolt fastening work.

[0103] As an improvement, as Figures 2 - 4 shown, the housing clamping unit 1 includes:

[0104] Support base 101;

[0105] Pre-tightening plate 102, which is slidably inserted inside the support base 101;

[0106] Inside the support base 101 and outside the pre-tightening plate 102, there is a first recessed groove 1011;

[0107] One end of the pre-tightening plate 102 is connected with a connecting rod 1021;

[0108] On the side of the connecting rod 1021, there is a lever 103 connected;

[0109] At the lower end of the lever 103 and inside the support base 101, there is a push plate 1031 connected;

[0110] On the side of the push plate 1031, there is a first telescopic sleeve 1032 connected;

[0111] Inside the first telescopic sleeve 1032, there is a pre-tightening spring 10321 inserted;

[0112] Preferably, inside the support base 101, there is a first guide groove 1012. Inside the first guide groove 1012 and outside the connecting rod 1021, there is a limiting plate 1013 slidably sleeved.

[0113] Furthermore, as Figures 4 - 5 shown, the housing clamping unit 1 further includes:

[0114] Adjusting mechanism 104, which is arranged on the side of the lever 103;

[0115] The adjusting mechanism 104 includes: middle convex plate 1041;

[0116] On the side of the middle convex plate 1041, there are successively a low convex plate 10411 and a high convex plate 10412 in transition;

[0117] One end of the middle convex plate 1041 is connected with an adjusting shaft 1043;

[0118] Outside the adjusting shaft 1043, there is a reversing gear 1042 sleeved.

[0119] As an improvement, as Figures 6 - 10 shown, the keyway correction unit 2 includes:

[0120] Cross beam 202;

[0121] On the side of the cross beam 202, there is a driving cylinder 201 connected;

[0122] On the side of the cross beam 202, there are multiple support platforms 203 connected;

[0123] A central control frame 2031 is rotatably connected inside the support platform 203;

[0124] A receiving groove 20311 is provided inside the central control frame 2031;

[0125] A turbine 2032 is provided outside the central control frame 2031 and inside the support platform 203;

[0126] A worm 206 that meshes with the turbine 2032 is rotatably inserted inside the support platform 203.

[0127] Further, as shown in Figure 8 、 Figure 10 , the upper lifting platform 204 includes:

[0128] A key detection rod 2041;

[0129] The key detection rod 2041 is provided at an eccentric position at the upper end of the upper lifting platform 204, and the diameter presented by the rotation of the key detection rod 2041 is equal to the diameter of the inner core;

[0130] A first return spring 2042 is sleeved outside the upper lifting platform 204 and inside the receiving groove 20311;

[0131] The lower end of the upper lifting platform 204 is connected to a second telescopic sleeve 2043;

[0132] The second telescopic sleeve 2043 is set to be square-shaped to prevent the relative movement of the orientation angle between the key detection rod 2041 and the detection block 20513 when the central control frame 2031 rotates.

[0133] Furthermore, as shown in Figure 10 , the lower lifting platform 205 includes:

[0134] A lifting block 2051;

[0135] A second guide groove 20511 is provided inside the lifting block 2051;

[0136] A limiting groove 20512 is provided above the second guide groove 20511 and inside the lifting block 2051;

[0137] A detection block 20513 is slidably inserted inside the second guide groove 20511;

[0138] A second return spring 2052 is sleeved outside the lifting block 2051 and outside the receiving groove 20311;

[0139] An adjusting rod 207 is inserted between the upper lifting platform 204 and the lifting block 2051. One end of the adjusting rod 207 is connected with a convex part 2071 for adjusting the distance between the upper lifting platform 204 and the lifting block 2051.

[0140] Among them, as Figure 10 shown, a locking spring 20514 is connected to the side of the detection block 20513 and inside the second guide groove 20511;

[0141] A stop baffle 205133 is connected to the upper end of the detection block 20513 and inside the limit groove 20512;

[0142] On the side of the detection block 20513, an inclined part 205131 is provided outside the lifting block 2051;

[0143] On the side of the detection block 20513, a guide bead 205132 is inserted above the inclined part 205131;

[0144] The direction of the key detection rod 2041 is always the same as that of the detection block 20513.

[0145] As an improvement, as Figure 11 shown, the inner core installation unit 3 includes: a lifting adjustment rail 301;

[0146] A middle bolt storage tray 302, the rear end of the middle bolt storage tray 302 is slidably inserted inside the lifting adjustment rail 301;

[0147] The upper end of the middle bolt storage tray 302 is connected with an adjustment pin 3021;

[0148] The upper end of the adjustment pin 3021 has an inclined surface;

[0149] Above the middle bolt storage tray 302, an upper bolt storage tray 303 is connected through a guide rod 3031 slidably inserted inside it;

[0150] A limit block 3032 is sleeved outside the guide rod 3031;

[0151] On the outside of the guide rod 3031, a lifting spring 304 is connected below the limit block 3032.

[0152] Furthermore, a second retreat groove 3030 is provided inside the upper bolt storage tray 303;

[0153] A pre-baffle 30301 is slidably inserted inside the second retreat groove 3030;

[0154] Inside the pre-baffle 30301, a propulsion groove 303011 adapted to the upper end of the adjustment pin 3021 is provided.

[0155] A third return spring 30302 is connected to the side of the pre-baffle 30301 and located inside the upper bolt storage tray 303 .

[0156] It should be added that, Figure 2 、 5 As shown, the present invention rotates the adjustment shaft 1043. When the low raised plate 10411 presses against the side of the push plate 1031, the pre-tightening plate 102 is completely located in the first retreat groove 1011. At this time, the entire housing can directly pass through the support seat 101. When the middle raised plate 1041 presses against the side of the push plate 1031, the housing can rotate relative to the pre-tightening plate 102. When the high raised plate 10412 presses against the side of the push plate 1031, the housing is clamped by the pre-tightening plate 102 and cannot rotate.

[0157] It should be noted that, initially, Figures 2 - 5 As shown, the adjusting shaft 1043 is rotated to push the middle raised plate 1041 against the side of the push plate 1031, and the outer shell is placed on the upper part of the support seat 101 and between the pre-tightening plates 102. At the same time, the inner core is placed on the upper part of the middle bolt storage tray 302 and the bolt end of the inner core is supported by the upper bolt storage tray 303. The driving cylinder 201 is started, and the driving cylinder 201 drives the support platform 203 to move to the position between the outer shell and the inner core through the crossbeam 202, so that the upper lifting platform 204 is located at the inner core. The key detection rod 2041 contacts the side wall of the inner core, the lower lifting platform 205 is located directly above the shell, and the adjusting rod 207 is rotated. The adjusting rod 207 pushes the upper lifting platform 204 through the protrusion 2071 to compress the first return spring 2042 and move upward. At the same time, the protrusion 2071 also drives the lifting block 2051 to compress the second return spring 2052 and move downward, so that the lifting block 2051 enters the interior of the shell as a whole, and the height of the key detection rod 2041 exceeds the lowest end of the key a. Figure 7 As shown;

[0158] like Figures 9 - 10 As shown, the worm 206 is rotated, and the worm 206 drives the central control frame 2031 to rotate through the turbine 2032. The central control frame 2031 drives the key detection rod 2041 to rotate along the inner core through the upper lifting platform 204. Until the key detection rod 2041 rotates one circle along the key a at the beginning and contacts the key a again, the worm 206 stops rotating. At this time, one cycle of detection work is completed, and the key groove b corresponding to the outer shell is exactly below the key a. The specific working principle is as follows, thereby achieving automatic adjustment and alignment of the groove reserved inside the outer shell with the key reserved outside the inner core, effectively preventing inaccurate installation of the inner core;

[0159] It should be added that, Figure 10As shown, when the lower lifting table 205 gradually moves downward along the upper opening of the housing, the inclined portion 205131 gradually pushes the detection block 20513 under the resistance of the upper opening of the housing to compress the locking spring 20514 and move along the second guide groove 20511. After the detection block 20513 enters the interior of the housing, it is always pressed against the inner edge of the housing under the action of the locking spring 20514. When the lower lifting table 205 rotates as a whole along the interior of the housing, it contacts the interior of the housing through the guide beads 205132, as Figure 8 shown, when the detection block 20513 passes through the keyway b, the locking spring 20514 on the side of the detection block 20513 pushes the detection block 20513 into the keyway b. During the subsequent rotation of the lower lifting table 205, the housing will rotate together with the lower lifting table 205 until a full cycle of rotational operation contact is achieved, thereby enabling timely recording and tracking of the keyway b when encountering it, further improving the detection accuracy and installation accuracy;

[0160] After the key and the keyway are adjusted and aligned, rotate the adjusting rod 207 to reset the upper lifting table 204 and the lower lifting table 205. Start the driving cylinder 201 to reset the entire keyway correction unit 2, and rotate the adjusting shaft 1043 to make the high convex plate 10412 press against the side of the push plate 1031 to lock the housing;

[0161] Push the middle bolt storage tray 302 downward along the lifting adjustment rail 301 to gradually insert the inner core into the interior of the housing, and then rotate the middle bolt to fasten the housing and the inner core. The internal structures of the middle bolt storage tray 302 and the upper bolt storage tray 303 in the present invention are the same. Therefore, the present invention only describes in detail the process of releasing bolts in the upper bolt storage tray 303, as Figure 11 shown, during the process of releasing the upper bolt for fastening, push the upper bolt storage tray 303 downward. The upper bolt storage tray 303 drives the upper bolt to move downward and gradually compress the lifting spring 304 until the propulsion groove 303011 in the upper bolt storage tray 303 is sleeved outside the adjusting pin 3021. At this time, the upper bolt is at the same horizontal height as the closed opening of the housing, and the limiting block 3022 gradually inserts into the propulsion groove 303011 and drives the guide rod 3031 to compress the third return spring 30302 along the second retraction groove 3030, causing the upper bolt to pass through the upper bolt storage tray 303, thereby achieving the layered installation of the middle bolt and the tail bolt, ensuring that the two groups of bolts do not interfere with each other during the installation process and having a safe use effect.

[0162] Embodiment 2

[0163] As Figure 12As shown in the figure, components that are the same or corresponding to those in the first embodiment are labeled with the corresponding reference numerals in the first embodiment. For the sake of simplicity, only the differences from the first embodiment will be described below. The differences between the second embodiment and the first embodiment are as follows:

[0164] A method for assembling an electric push rod using an automatic assembly production line for electric push rods, comprising the following steps:

[0165] Step 1, housing placement process: Place the housing on the upper part of the support base 101 in sequence, such that the housing is placed vertically.

[0166] Step 2, inner groove detection process: The support platform 203 synchronously drives the upper lifting platform 204 and the lower lifting platform 205 to move to the position between the inner core and the outer shell, and synchronously rotates to adjust the groove inside the outer shell and the key on the outer side of the inner core to be vertically aligned, and then the support platform 203 is reset.

[0167] Step 3, inner core insertion process: The middle bolt storage tray 302 moves downward along the lifting adjustment rail 301 to send the inner core into the outer shell.

[0168] Step 4, middle bolt tightening process: After the inner core is completely inserted into the outer shell, rotate the middle bolt to fasten the inner core and the outer shell as a whole; Step 5, tail bolt tightening process: Push the upper bolt storage tray 303 downward to make the upper bolt reach the tail port of the housing to be closed, and rotate the tail screw to close the housing and the inner core as a whole;

[0169] Step 6, feeding process: Rotate the adjustment mechanism 104 to completely separate the two pre-tightening plates 102, and the assembled electric push rod falls off along the support base 101.

[0170] It should be noted that after the assembly is completed and during the feeding process, as Figures 2 - 5 shown, the adjustment shaft 1043 can be rotated to switch the originally high convex plate 10412 pressing against the side of the push plate 1031 to the low convex plate 10411 pressing against the side of the push plate 1031. At this time, the pre-tightening plate 102 disengages from the outer shell and completely enters the first retraction groove 1011, and the assembled electric push rod disengages from the support base 101 and completes the automatic unloading work, thus achieving the effect of automatic unloading.

[0171] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic assembly line for electric push rods, characterized in that: include: Shell clamping unit; A keyway correction unit, the keyway correction unit being arranged on the upper portion of the housing clamping unit; An inner core installation unit, the inner core installation unit being arranged on an upper portion of the keyway correction unit; The keyway correction unit comprises: An upper lifting platform for detecting the position of the keys on the inner core surface; and A lower lifting platform for detecting the position of the inner groove of the shell; During operation, the shell is placed on the shell clamping unit in sequence, and the inner core is placed on the inner core clamping unit in sequence. The keyway correction unit moves to the position between the shell and the inner core, and adjusts the key position on the outside of the inner core and the slot position inside the shell to correspond to each other through the rotating upper and lower lifting platforms. The inner core installation unit inserts the corresponding inner core into the shell and performs bolt tightening work. The keyway correction unit comprises: beam; The side of the beam is connected to a plurality of support platforms; The support platform is internally rotatably connected to a central control frame; A receiving slot is provided inside the central control frame; A worm gear is provided outside the central control frame and inside the support platform; The upper lifting platform comprises: Key detection lever; The key detection rod is arranged at an eccentric position on the upper end of the upper lifting platform and the diameter of the key detection rod when it rotates is equal to the diameter of the inner core; A first return spring is sleeved on the outside of the upper lifting platform and inside the accommodating groove; The lower end of the upper lifting platform is connected to a second telescopic sleeve; The lower lifting platform comprises: lifting blocks; A second guide groove is provided inside the lifting block; A limiting groove is provided on the upper portion of the second guide groove and inside the lifting block; A detection block is slidably inserted into the second guide groove; A second return spring is sleeved on the outside of the lifting block and located outside the accommodating groove; A locking spring is connected to the side of the detection block and located inside the second guide groove; A stop plate is connected to the upper end of the detection block and located inside the limiting groove; The side portion of the detection block is provided with an inclined portion located outside the lifting block; The side of the detection block is located above the inclined portion and is plugged with a guide bead; The inner core installation unit includes: a lifting and adjusting rail; The rear end of the middle bolt storage tray is slidably inserted into the lifting adjustment rail; An adjusting pin is connected to the upper end of the middle bolt storage tray; The upper end of the adjusting pin is provided with an inclined surface; The upper bolt storage tray is connected to the middle bolt storage tray via a guide rod slidably inserted into the middle bolt storage tray; The guide rod is externally sleeved with a limit block; The outer side of the guide rod is connected to a lifting spring below the limit block; A second retreat groove is provided inside the upper bolt storage tray; A pre-baffle is slidably inserted into the second retreat groove; The pre-baffle is provided with a propulsion groove adapted to the upper end of the adjustment pin; A third return spring is connected to the side of the pre-baffle and located inside the upper bolt storage tray.

2. The automatic assembly line for electric push rods according to claim 1, characterized in that: The housing clamping unit comprises: Support seat; A pre-tightening plate, the pre-tightening plate being slidably inserted into the support seat; A first retreat groove is provided inside the support seat and outside the preload plate; One end of the preload plate is connected to a connecting rod; The side of the connecting rod is connected to a shift rod; A push plate is connected to the lower end of the shift rod and is located inside the support seat; The side of the push plate is connected to a first telescopic sleeve; A pre-tightening spring is inserted into the first telescopic sleeve.

3. The automatic assembly line for electric push rods according to claim 2, characterized in that: The housing clamping unit further includes: an adjusting mechanism, the adjusting mechanism being arranged on a side of the shifting lever; The adjustment mechanism includes: a central raised plate; The side of the middle raised plate is sequentially transitioned to a low raised plate and a high raised plate; One end of the middle raised plate is connected to an adjustment shaft; A reversing gear is sleeved on the outside of the adjusting shaft.

4. A method for assembling electric linear actuators according to any one of claims 2 to 3, wherein: The following steps are involved: Step 1: Shell placement process: Place the shells on the upper part of the support base in sequence so that the shells are placed vertically; Step 2: Inner groove inspection process: The support platform synchronously drives the upper and lower lifting platforms to move to the position between the inner core and the outer shell, and synchronously rotates to adjust the groove inside the outer shell and the key outside the inner core to be aligned up and down, and then resets the support platform; Step 3: Inserting the inner core: The central bolt storage tray moves downward along the lifting and adjusting rails to deliver the inner core into the outer shell; Step 4: Tightening the middle bolt: After the inner core is fully inserted into the outer shell, turn the middle bolt to secure the inner core to the outer shell. Step 5: Tightening the tail bolt: Push the upper bolt storage tray downward until the upper bolt rests on the rear port of the shell that needs to be sealed, and turn the tail screw to seal the shell and the inner core. Step 6: Discharging process: rotate the adjustment mechanism to completely separate the two sets of preload plates. After assembly, the electric push rod falls off along the support seat.

Images