Automatic frame locking device of loading machine

Abstract

The invention discloses an automatic frame locking device of a loader, lug seats are arranged on a rear frame and a front frame of the loader, the lug seat on the rear frame is connected with the lug seat on the front frame through a fixing rod, and the automatic frame locking device comprises a first box body and a second box body, the first box body and the second box body are installed on a rear frame and a front frame of the loading machine respectively, and a locking mechanism used for locking one end of the fixing rod is arranged in the second box body. A swing mechanism for controlling the fixed rod to swing and a locking driving mechanism for controlling the locking mechanism to work are arranged in the first box body, one end of the fixed rod is mounted on a lug seat of the rear frame through a rotating shaft and a bearing seat, the fixed rod is fixedly connected with the rotating shaft, so that the rotating shaft can drive the fixed rod to swing, and the rotating shaft is connected with the swing mechanism; the locking mechanism in the second box body is driven by the locking driving mechanism to be matched with the front frame lug base, the end portion of the fixing rod swinging into the front frame lug base is locked, and automatic locking of the rear frame and the front frame of the loading machine is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of loaders, and in particular to an automatic locking device for a frame of a loader. Background Art

[0002] Currently, the front and rear frames of a loader are locked by the driver manually rotating a fixing rod to the ear seat of the front frame and then inserting a pin shaft for locking. For the driver, the operation is not only cumbersome and troublesome but also dirty the driver's hands. The present invention proposes an automatic locking device for the frame of a loader, which is an automatic locking device. The driver only needs to press a button to achieve automatic locking of the frame, thereby improving the locking pin rate and avoiding dirtying the driver's hands, thereby greatly improving the driver's driving experience. Summary of the Invention

[0003] In response to the problems existing in the above-mentioned prior art, the present invention provides an automatic locking device for a loader frame, in which one end of a fixed rod is mounted on an ear seat of a rear frame through a rotating shaft and a bearing seat, and the fixed rod is fixedly connected to the rotating shaft so that the rotating shaft can drive the fixed rod to swing, and the rotating shaft is connected to a swinging mechanism; by providing a swinging mechanism for controlling the swinging of the fixed rod and a locking drive mechanism for controlling the operation of the locking mechanism, automatic locking of the front and rear frames is achieved.

[0004] To achieve the above-mentioned object, the present invention adopts a technical solution as follows: an automatic locking device for a loader frame, wherein both the rear frame and the front frame of the loader are provided with ear seats, the ear seats on the rear frame and the ear seats on the front frame are connected by a fixing rod, and mounting holes are provided at both ends of the fixing rod. The automatic locking device for the frame comprises: a first box body and a second box body, the first box body and the second box body being respectively mounted on the rear frame and the front frame of the loader, so that the ear seats on the rear frame and the ear seats on the front frame are respectively located in the first box body and the second box body; The second box body is provided with a locking mechanism for locking one end of the fixing rod; The first box body is provided with a swing mechanism for controlling the swing of the fixed rod and a locking drive mechanism for controlling the operation of the locking mechanism. One end of the fixed rod is mounted on the ear seat of the rear frame through a rotating shaft and a bearing seat. The fixed rod is fixedly connected to the rotating shaft so that the rotating shaft can drive the fixed rod to swing. The rotating shaft is connected to the swing mechanism. The swing mechanism drives the rotating shaft to rotate, thereby driving the fixed rod to swing; the locking mechanism in the second box is driven by the locking drive mechanism to cooperate with the front frame ear seat, and the end of the fixed rod swung into the front frame ear seat is locked, thereby realizing automatic locking of the rear frame and the front frame of the loader.

[0005] Furthermore, the first box body is provided with a locking mechanism and a guide plate for locking one end of the fixing rod, and the rear frame is provided with an ear seat for cooperating with the locking mechanism of the first box body. The guide plate is fixed in the first box body and is located above the ear seat for cooperating with the locking mechanism of the first box body. The end of the fixing rod is locked by the locking mechanism and the ear seat for cooperating with the locking mechanism of the first box body, thereby fixing the end of the fixing rod.

[0006] Furthermore, the locking mechanism is a locking pin.

[0007] Furthermore, the locking drive mechanism includes: a second motor, a second motor mounting plate, a first pulley, a second pulley, a third pulley, a pulley mounting shaft, a wire groove, a limit plate, and a traction rope. The second motor is mounted in the first box through the second motor mounting plate, the first pulley is mounted on the second motor, the first pulley is connected to the locking pins in the first box and the second box respectively through the two traction ropes, the second pulley and the third pulley are respectively arranged above the locking pin of the first box and the locking pin of the second box through the pulley mounting shaft to change the direction of the traction rope, the two limit plates are arranged between the second pulley and the locking pin and between the third pulley and the locking pin to limit the traction rope, and a plurality of wire grooves are arranged below the traction rope for guiding the traction rope.

[0008] Furthermore, the locking drive mechanism also includes: a first photoelectric sensor and a second photoelectric sensor. The first photoelectric sensor is arranged at the ear seat below the guide plate, and is used to detect whether the fixing rod and the ear seat below the guide plate have reached the locking position. The second photoelectric sensor is arranged in the ear seat of the front frame, and is used to detect whether the fixing rod has reached the locking position in the ear seat of the front frame.

[0009] Furthermore, the swing mechanism adopts a synchronous belt transmission mechanism, which includes: a driving pulley, a driven pulley, a synchronous belt, a first motor, and a first motor mounting plate. The driven pulley is installed on the rotating shaft, the first motor is installed in the first box through the first motor mounting plate, the driving pulley is installed on the first motor, and the synchronous belt is installed on the driving pulley and the driven pulley so that the two can be linked, and the rotating shaft is driven to rotate by the first motor to control the swing range of the fixed rod.

[0010] Furthermore, the first box body and the second box body are provided with openings for the fixing rod to swing into.

[0011] Furthermore, round holes for installing traction ropes are opened on the sides of the first box body and the second box body, and rubber sleeves are provided on the round holes.

[0012] The beneficial effects of the present invention are: The present invention is used for the automatic locking device of the loader frame, which can realize automatic locking of the front and rear frames of the loader with one button, thereby improving the driving experience of the driver; The present invention is used for the automatic locking device of the loader frame. It is driven by a motor, a synchronous belt and cooperates with a pulley to realize automatic locking of the front and rear frames. The automatic locking device is equipped with a housing, and only part of the fixing rod is exposed outside, so the protection performance is good and the service life is long. The automatic locking device for the frame of a loader of the present invention is installed on the front and rear frames only by bolts, has a compact structure, occupies a small space, is easy to install and disassemble, and is convenient for later maintenance and replacement. It is also suitable for the existing structure of the loader and can be installed by simply drilling threaded holes on the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall schematic diagram of the loader's frame automatic locking device; Figure 2 Schematic diagram of the internal structure of the first box; Figure 3 for Figure 2 A partial enlargement of Figure 1 ; Figure 4 for Figure 3 Schematic diagram of part of the explosion structure; Figure 5 for Figure 2 A partial enlargement of Figure 2 ; Figure 6 for Figure 5 Partial explosion diagram Figure 2 ; Figure 7 Schematic diagram of the internal structure of the second box; Figure 8 for Figure 7 Schematic diagram of local structure; Figure 9 This is a schematic diagram of the state when the front and rear vehicles of the loader are fixed; Figure 10 This is a schematic diagram of the state when the front and rear vehicles of the loader are not fixed; Figure 11 This is the control flow chart when the front and rear vehicles of the loader are fixed; In the figure: 1, first housing; 101, first shield; 102, first bottom plate; 103, pulley; 104, bearing seat; 105, rotating shaft; 106, flat key; 107, fixing rod; 108, first motor; 109, coupling; 110, transmission shaft; 111, synchronous belt; 112, second motor; 113, first motor mounting plate; 114, second motor mounting plate; 115, first pulley; 116, first pulley bearing; 117, first pulley mounting shaft; 118, second pulley; 119, second pulley shaft Bearing; 120, second pulley mounting shaft; 121, second wire groove; 122, first wire groove; 123, limit plate; 124, first locking pin; 125, guide plate; 126, first traction rope; 127, second traction rope; 128, rubber sleeve 128; 129, first photoelectric sensor; 2, second box body; 201, second protective cover; 202, second bottom plate; 203, third pulley mounting shaft; 204, third pulley; 205, third pulley bearing; 206, second locking pin; 207, second photoelectric sensor. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0016] like Figure 1-8 As shown, an automatic locking device for a loader frame is provided, wherein ear seats are provided on the left beam plates of the rear frame and the front frame of the loader, and the ear seats on the rear frame and the front frame are connected by a fixing rod 107, and mounting holes are provided at both ends of the fixing rod 107. The automatic locking device for the frame includes: a first box body 1 and a second box body 2, which are respectively mounted on the left beam plates of the rear frame and the front frame of the loader, so that the ear seats on the rear frame and the front frame are respectively located in the first box body 1 and the second box body 2; The second box body 2 is provided with a locking mechanism for locking one end of the fixing rod 107; The first box body 1 is provided with a swing mechanism for controlling the swing of the fixed rod 107 and a locking drive mechanism for controlling the operation of the locking mechanism. One end of the fixed rod 107 is mounted on the ear seat of the rear frame through the rotating shaft 105 and the bearing seat 104. The fixed rod 107 is fixedly connected to the rotating shaft 105 so that the rotating shaft 105 can drive the fixed rod 107 to swing. The rotating shaft 105 is connected to the swing mechanism. The swing mechanism drives the rotating shaft 105 to rotate, thereby driving the fixed rod 107 to swing; the locking mechanism in the second box body 2 is driven by the locking drive mechanism to cooperate with the front frame ear seat, and the end of the fixed rod 107 that swings into the front frame ear seat is locked, thereby realizing automatic locking of the rear frame and the front frame of the loader.

[0017] like Figure 2 As shown, the first box body 1 includes: a first shield 101, a first bottom plate 102, the first bottom plate 102 is mounted on the left side beam plate of the rear frame by bolts, the first shield 101 and the cover are mounted on the first bottom plate 102 and fixed by bolts; Figure 7 As shown, the second box body 2 includes: a second shield 201 and a second bottom plate 202. The second bottom plate 202 is mounted on the left beam plate of the front frame by bolts. The second shield 201 and the cover are mounted on the second bottom plate 202 and fixed by bolts.

[0018] like Figure 2-6 As shown, the swing mechanism adopts a synchronous belt transmission mechanism, which includes: a driving pulley 103, a driven pulley 103, a synchronous belt 111, a first motor 108, and a first motor mounting plate 113. The driven pulley 103 is mounted on the rotating shaft 105, and the first motor 108 is mounted on the first base plate 102 through the first motor mounting plate 113. The driving pulley 103 is mounted on the first motor 108, and the synchronous belt 111 is mounted on the driving pulley 103 and the driven pulley 103 so that the two can be linked. The synchronous belt 111 transmits the torque output by the first motor 108 to the rotating shaft 105 to control the swing range of the fixed rod 107.

[0019] like Figure 5 As shown, the output shaft of the first motor 108 is connected to the driving pulley 103 through a coupling 109 and a transmission shaft 110 .

[0020] The top of the rotating shaft 105 is fixedly connected to the driven pulley 103, the bearing seat 104 is fixedly connected to the ear seat on the rear frame, the bearing seat 104 is equipped with a bearing, and the fixing rod 107 is fixedly connected to the rotating shaft 105 by a flat key 106, which enhances the stability of the connection. When the driving pulley 103 rotates, the rotating shaft 105 and the fixing rod 107 rotate accordingly.

[0021] like Figure 2 As shown in the figure, there are two ear seats on the left side beam plate of the rear frame of the loader. Figure 4As shown, one is connected to the fixing rod 107 through the rotating shaft 105 and the bearing seat 104, as shown in FIG. Figure 5 、 6 As shown, the other is used to cooperate with the locking mechanism in the first box body 1 to fix the end of the fixing rod 107 in the first box body 1, and an ear seat is provided on the left beam plate of the front frame to cooperate with the locking mechanism in the second box body 2 to fix the end of the fixing rod 107 in the second box body 2.

[0022] like Figure 5-6 As shown, a locking mechanism and a guide plate 125 for locking one end of the fixing rod 107 are provided in the first box body 1, and an ear seat for cooperating with the locking mechanism of the first box body 1 is provided on the rear frame. The guide plate 125 is fixed in the first box body 1 and is located above the ear seat that cooperates with the locking mechanism of the first box body 1. The end of the fixing rod 107 is locked by the locking mechanism and the ear seat that cooperates with the locking mechanism of the first box body 1, so that the end of the fixing rod 107 is fixed.

[0023] The locking mechanism is a locking pin, the first locking pin 124 is provided in the first box body 1 , and the second locking pin 206 is provided in the second box body 2 .

[0024] like Figure 2 、 4, 5, 6, 7, 8, the locking drive mechanism includes: a second motor 112, a second motor 112 mounting plate 114, a first pulley 115, a second pulley 118, a third pulley 204, a first pulley mounting shaft 117, a second pulley mounting shaft 120, a third pulley mounting shaft 203, a first wire groove 122, a second wire groove 121, a first limiting plate 123, a second limiting plate 123, a first traction rope 126, and a second traction rope 127. The second motor 112 is connected to the second motor 112 mounting plate 114 is installed on the first bottom plate 102 in the first box body 1, and the first pulley 115 is installed on the second motor 112. The first pulley 115 is a double-track pulley, and the second pulley 118 and the third pulley 204 are single-track pulleys. The first pulley 115 is connected to the first locking pin 124 and the second locking pin 206 respectively through the first traction rope 126 and the second traction rope 127. The second pulley 118 is installed above the first locking pin 124 through the second pulley mounting shaft 120, and is used to change the direction of the first traction rope 126 so that the second traction rope 127 can be tightened. A locking pin 124 moves up and down in the guide plate 125, and the third pulley 204 is installed above the second locking pin 206 through the third pulley mounting shaft 203, changing the direction of the second traction rope 127. The first limiting plate 123 is installed between the second pulley 118 and the first locking pin 124 in the first box body 1, so that the first traction rope 126 is located in the notch of the first limiting plate 123, limiting the first traction rope 126. The second limiting plate 123 is installed between the third pulley 204 installed in the second box body 2 and the second locking pin 124. The second traction rope 127 is located between the pins 206, so that the second traction rope 127 is located in the notch of the second limiting plate 123, thereby limiting the second traction rope 127; a first wire groove 122 and multiple second wire grooves 121 are set below the traction rope to control the position of the traction rope, wherein the first wire groove 122 is used to guide the first traction rope 126 and the second traction rope 127, and the multiple second wire grooves 121 are used to guide the second traction rope 127 to avoid the locking pin repeatedly rising and falling, causing the traction rope to deviate and detach from the pulley.

[0025] A first pulley bearing 116 is provided between the first pulley 115 and the first pulley mounting shaft 117, a second pulley bearing 119 is provided between the second pulley 118 and the second pulley mounting shaft 120, and a third pulley bearing 205 is provided between the third pulley 204 and the third pulley mounting shaft 203 to ensure smooth rotation of the rollers.

[0026] The locking drive mechanism of the above structure can simultaneously control the operation of the locking mechanism.

[0027] When the second motor 112 rotates, the first pulley 115 rotates, and the first locking pin 124 and the second locking pin 206 are respectively lengthened or shortened through the first traction rope 126 and the first traction rope 126 under the influence of the pulley, thereby driving the first locking pin 124 and the second locking pin 206 to rise or fall. Since the radius of the double tracks in the first pulley 115 is exactly the same, it can be ensured that the first locking pin 124 and the second locking pin 206 rise or fall synchronously, and the rising or falling heights are exactly the same.

[0028] When the first locking pin 124 reaches the highest position, the second motor 112 will stop rotating. At this time, a section of the tail of the first locking pin 124 is still in the hole of the guide plate 125. At this time, the limit plate 123 plays a limiting role to prevent the first locking pin 124 from continuing to rise and hitting the second pulley 118, causing damage to the device. When the first locking pin 124 descends, the first locking pin 124 passes through the mounting hole of the fixing rod 107 and the ear seat and then locks the fixing rod 107. Under the action of the guide plate 125, it is ensured that the first locking pin 124 will not deviate from the trajectory, and the fixing rod 107 can be locked.

[0029] There are circular holes on the sides of the first protective cover 101 and the second protective cover 201. The second traction rope 127 of the second locking pin 206 passes through the circular holes and is fixedly connected to the first pulley 115. The second wire groove 121 is used to guide the traction rope to prevent the second locking pin 206 axis from repeatedly rising and falling, causing the traction rope to deviate and detach from the pulley. Rubber sleeves are arranged in the circular holes of the first protective cover 101 and the second protective cover 201. The function of the rubber sleeve is to prevent the second traction rope 127 from rubbing against the box for a long time and causing wear and breakage.

[0030] like Figure 9 As shown, the front and rear vehicles of the loader are not fixed. At this time, the fixing rod 107 is in a locked state inside the first box body 1, and the first locking pin 124 and the second locking pin 206 both pass through the ear seats on the vehicle frame; like Figure 10 As shown, the state of the rear vehicle of the loader is fixed. At this time, one end of the fixing rod 107 is set inside the second box body 2 and is in a locked state, with the first locking pin 124 and the second locking pin 206.

[0031] like Figure 6 、 8 As shown, the locking drive mechanism further includes: a first photoelectric sensor 129 and a second photoelectric sensor 207. The first photoelectric sensor 129 is arranged at the ear seat below the guide plate 125, and is used to detect whether the fixing rod 107 and the ear seat below the guide plate 125 have reached the locking position. The second photoelectric sensor 207 is arranged in the ear seat of the front frame, and is used to detect whether the fixing rod 107 has reached the locking position in the ear seat of the front frame.

[0032] An opening for the fixing rod 107 to swing in is provided on the first shield 101 of the first box body 1 and the second shield 201 of the second box body 2, so that the fixing rod 107 can swing. Only part of the fixing rod 107 is exposed outside through the second box body 2 of the first box body 1, which has good protection performance and long service life.

[0033] The first motor 108, the second motor 112, the first photoelectric sensor 129, and the second photoelectric sensor 207 are all connected to the vehicle controller, and the vehicle controller is externally connected to a locking button and a disengagement button. Among them, the first motor 108 and the second motor 112 are servo motors or motors with encoders.

[0034] like Figure 11 As shown in FIG, the control method for connecting the front and rear frames of the loader's frame automatic locking device is as follows: S1: The driver presses the lock button; S2: The onboard controller obtains the steering angle of the loader and determines whether it is less than the set range. If the steering angle of the loader is too large or too small, the mounting hole of the fixing rod 107 will not be aligned with the mounting hole of the front frame ear seat, and thus cannot be locked. Therefore, when the steering angle is within the set range, the process jumps to S4. When the steering angle is within the set range, the process jumps to S3. S3: Adjust the loader rotation angle to within the set value; S4: The second motor 112 starts to rotate, causing the first pulley 115 to wind around the first traction rope 126 and the second traction rope 127, driving the first locking pin 124 and the second locking pin 206 to rise. When the first locking pin 124 rises to the highest position, the second motor 112 stops rotating. S5: After the second motor 112 stops rotating, the fixed rod 107 is in the unlocked state, and the first motor 108 starts to rotate forward, driving the fixed rod 107 to rotate through the synchronous belt 111, so that the end of the fixed rod 107 rotates toward the second box body 2; S6: When the second photoelectric sensor 207 senses the fixed rod 107, go to S7, otherwise go to S6; S7: When the rotation speed of the first motor 108 is within the preset range, go to S7, otherwise go to S6; S8: The first motor 108 stops rotating, and the second motor 112 rotates, so that the first pulley 115 releases the wound first traction rope 126 and the second traction rope 127, and the first locking pin 124 and the second locking pin 206 descend to lock the fixing rod 107, and the second motor 112 stops rotating, thereby realizing the automatic connection of the front and rear vehicle bodies.

[0035] The control method for separating the front and rear frames of the loader's frame automatic locking device is as follows: S1: The driver presses the disengagement button; S2: The onboard controller obtains the steering angle of the loader and determines whether it is less than the set range. If the steering angle of the loader is too large or too small, the mounting hole of the fixing rod 107 and the locking shaft in the mounting hole of the front frame ear seat cannot be effectively disengaged. Therefore, when the steering angle is within the set range, the process jumps to S4. When the steering angle is within the set range, the process jumps to S3. S3: Adjust the loader rotation angle to within the set value; S4: The second motor 112 starts to rotate, causing the first pulley 115 to wind around the first traction rope 126 and the second traction rope 127, and the first locking pin 124 and the second locking pin 206 to rise. When the first locking pin 124 rises to the highest position, the second motor 112 stops rotating. S5: After the second motor 112 stops rotating, the fixing rod 107 is in the unlocked state, and the first motor 108 starts to reverse, driving the fixing rod 107 to rotate via the synchronous belt 111, so that the end of the fixing rod 107 moves away from the second box 2; S6: When the first photoelectric sensor 129 senses the fixed rod 107, go to S7, otherwise go to S6; S7: When the rotation speed of the first motor 108 is within the preset range, go to S7, otherwise go to S6; S8: The first motor 108 stops rotating, and the second motor 112 rotates, causing the first pulley 115 to release the wound first traction rope 126 and the second traction rope 127, and the first first locking pin 124 and the second first locking pin 124 descend to lock the fixing rod 107, and the second motor 112 stops rotating. At this time, the fixing rod 107 is fixed in the first box body 1.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic locking device for a loader frame, wherein both the rear frame and the front frame of the loader are provided with lugs, the lugs on the rear frame are connected to the lugs on the front frame by a fixing rod, and mounting holes are provided at both ends of the fixing rod, characterized in that: The automatic locking device for a vehicle frame comprises: a first box body and a second box body, wherein the first box body and the second box body are respectively mounted on the rear frame and the front frame of the loader, so that the ear seat on the rear frame and the ear seat on the front frame are respectively located in the first box body and the second box body; The second box body is provided with a locking mechanism for locking one end of the fixing rod; The first box body is provided with a swing mechanism for controlling the swing of the fixed rod and a locking drive mechanism for controlling the operation of the locking mechanism. One end of the fixed rod is mounted on the ear seat of the rear frame through a rotating shaft and a bearing seat. The fixed rod is fixedly connected to the rotating shaft so that the rotating shaft can drive the fixed rod to swing. The rotating shaft is connected to the swing mechanism. The swing mechanism drives the rotating shaft to rotate, thereby driving the fixed rod to swing; the locking mechanism in the second box is driven by the locking drive mechanism to cooperate with the front frame ear seat, and the end of the fixed rod swung into the front frame ear seat is locked, thereby realizing automatic locking of the rear frame and the front frame of the loader.

2. The automatic locking device for a loader frame according to claim 1, characterized in that: The first box body is provided with a locking mechanism and a guide plate for locking one end of the fixing rod, and the rear frame is provided with an ear seat for cooperating with the locking mechanism of the first box body. The guide plate is fixed in the first box body and is located above the ear seat for cooperating with the locking mechanism of the first box body. The end of the fixing rod is locked by the locking mechanism and the ear seat for cooperating with the locking mechanism of the first box body, thereby fixing the end of the fixing rod.

3. The automatic locking device for a loader frame according to claim 2, characterized in that: The locking mechanism is a locking pin.

4. The automatic locking device for a loader frame according to claim 3, characterized in that: The locking drive mechanism includes: a second motor, a second motor mounting plate, a first pulley, a second pulley, a third pulley, a pulley mounting shaft, a wire groove, a limit plate, and a traction rope. The second motor is mounted in the first box through the second motor mounting plate, the first pulley is mounted on the second motor, the first pulley is connected to the locking pins in the first box and the second box respectively through the two traction ropes, the second pulley and the third pulley are respectively arranged above the locking pin of the first box and the locking pin of the second box through the pulley mounting shaft to change the direction of the traction rope, the two limit plates are arranged between the second pulley and the locking pin and between the third pulley and the locking pin to limit the traction rope, and a plurality of wire grooves are arranged below the traction rope for guiding the traction rope.

5. The automatic locking device for a loader frame according to claim 4, characterized in that: The locking drive mechanism further includes: a first photoelectric sensor and a second photoelectric sensor, wherein the first photoelectric sensor is arranged at the ear seat below the guide plate, and is used to detect whether the fixing rod and the ear seat below the guide plate have reached the locking position; the second photoelectric sensor is arranged in the ear seat of the front frame, and is used to detect whether the fixing rod has reached the locking position in the ear seat of the front frame.

6. The automatic locking device for a loader frame according to claim 1, characterized in that: The swing mechanism adopts a synchronous belt transmission mechanism, which includes: a driving pulley, a driven pulley, a synchronous belt, a first motor, and a first motor mounting plate. The driven pulley is mounted on the rotating shaft, the first motor is mounted in the first housing through the first motor mounting plate, the driving pulley is mounted on the first motor, and the synchronous belt is mounted on the driving pulley and the driven pulley so that the two can be linked together. The rotating shaft is driven to rotate by the first motor to control the swing range of the fixed rod.

7. The automatic locking device for a loader frame according to claim 1, characterized in that: The first box body and the second box body are provided with openings for the fixing rod to swing into.

8. The automatic locking device for a loader frame according to claim 1, characterized in that: Round holes for installing traction ropes are opened on the sides of the first box body and the second box body, and rubber sleeves are provided on the round holes.

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