Emergency stop protection mechanism for a loader arm

Abstract

The application discloses a kind of loader bucket arm emergency stop protection mechanism, including first bucket arm, it is connected between the bottom of main body of loader, and its angle variation work is controlled by second telescopic cylinder;Further comprising: drive mechanism, it is in the external position of second bucket arm, for controlling the mechanical work of entire emergency stop device;Emergency stop control mechanism, for making the friction between the first bucket arm, second bucket arm and the perforation on the bucket and rotating mechanism, reach the first bucket arm, second bucket arm and bucket three cannot be rotated outside the rotating mechanism Work is done.The loader bucket arm emergency stop protection mechanism it can automatically start work when the malfunction of loader bucket arm occurs, reach the effect that the bucket arm on loader can be controlled immediately, ensure that the phenomenon of personnel injury and nearby equipment damage caused by bucket arm malfunction moving downward cannot occur.

Description

Technical Field

[0001] This invention relates to the field of loader technology, specifically to an emergency stop protection mechanism for a loader boom. Background Technology

[0002] 1. Loaders are indispensable in construction processes. They can be used for loading and unloading soil, sand, gravel, lime, and coal. In highway construction, loaders can also be used for road excavation and filling, as well as for collecting and loading asphalt mixtures and cement concrete materials. Therefore, they assist in road and building construction. Generally, when loaders are loading and unloading soil, they control the bucket by the interaction between the various shafts connected to the booms. The booms are typically controlled by telescopic cylinders. However, when loaders are used for... During prolonged operation, the telescopic cylinders controlling the rotation between the booms often malfunction. Due to the large size of loaders, without appropriate protective mechanisms, malfunctions can easily lead to injuries and damage to nearby equipment on the construction site. Therefore, an emergency stop protection mechanism for the loader boom is necessary. This mechanism can promptly control the operation between the booms when a telescopic cylinder malfunctions, ensuring they remain in normal working order. Once the entire system has been moved to a suitable position, maintenance can then be carried out. Summary of the Invention

[0003] The purpose of this invention is to provide an emergency stop protection mechanism for a loader boom, in order to solve the problem mentioned in the background art that, when loaders on the market are working, the booms are generally controlled by telescopic cylinders. However, when loaders are working for a long time, the telescopic cylinders used to control the rotation between the booms often malfunction.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an emergency stop protection mechanism for a loader boom, comprising a first boom, the bottom of which is connected to the loader body, and the angle change of which is controlled by a second telescopic cylinder;

[0005] The second bucket arm is located at the top of the first bucket arm and rotates with the first bucket arm through a rotating mechanism. Its angle change is controlled by the first telescopic cylinder.

[0006] The bucket is located at the top of the second boom and rotates with the second boom via a rotating mechanism. Its angle is controlled by a third telescopic cylinder.

[0007] Also includes:

[0008] The drive mechanism, located on the outside of the second boom, is used to control the mechanical operation of the entire emergency stop device;

[0009] The emergency stop control mechanism is used to adjust the friction between the perforations on the first boom, second boom, and bucket and the rotating mechanism, so that the first boom, second boom, and bucket cannot rotate outside the rotating mechanism.

[0010] The emergency stop control mechanism includes a linkage mechanism, a connecting mechanism, and a protruding mechanism. The top of one side of the drive mechanism is connected to the linkage mechanism. The top of the linkage mechanism is connected to the connecting mechanism, and the connecting mechanism has a protruding mechanism on its exterior.

[0011] Preferably, the rotating mechanism includes:

[0012] The rotating shaft is set in the through holes at the top of the first bucket arm and the second bucket arm, and four through holes are set at equal angles on the outside of the rotating shaft, and two sets of the four through holes are symmetrically arranged on the outside of the rotating shaft.

[0013] The moving mechanism consists of a compression spring, a moving plate, and an electromagnet. The rotating shaft and the moving plate are connected by the compression spring, and an electromagnet is provided on the outside of the faces of the rotating shaft and the moving plate.

[0014] Preferably, the drive mechanism includes:

[0015] The drive motor is located on the outside of the second bucket arm, and a drive gear is coaxially connected to its top end;

[0016] The driven gear is positioned below the driving gear and meshes with it.

[0017] Preferably, the linkage mechanism includes:

[0018] The winding spool is coaxially connected to the driven gear, and the top end of the winding spool is also coaxially connected to an intermediate shaft, which is connected to the bearing at the middle position of the through hole.

[0019] A connecting chain, one end of which is wound around the outside of a winding shaft, and the other end of which is wound around a winding shaft on another linkage mechanism;

[0020] The limiting mechanism is used to connect the winding shaft and the connecting mechanism, so that the connecting mechanism is driven to rotate when the winding shaft rotates.

[0021] Preferably, the connecting mechanism includes:

[0022] The mounting base has a rotating rod at its top, and the rotating rod and the mounting base are arranged in a "T" shape when viewed from above. The top position of the mounting base corresponds to the position of the intermediate shaft, and the top of the mounting base has a groove that engages with the top of the intermediate shaft.

[0023] Two rotating protrusions are symmetrically arranged in the middle of the rotating rod, and the top of the rotating protrusions is arranged in an arc shape.

[0024] Preferably, the limiting mechanism consists of limiting blocks and limiting grooves. Four limiting blocks are equally spaced at the top outer position of the intermediate shaft, and four limiting grooves are equally spaced at the top outer position of the mounting base. The limiting grooves and limiting blocks are engaged with each other. The outer side of the mounting base is connected to the outer side of the rotating shaft by a torsion spring.

[0025] Preferably, the protruding mechanism includes:

[0026] The emergency stop mechanism consists of a first movable plate, a first return spring, and a pressing block, and is used to prevent the bucket arm from rotating around the rotating mechanism 3.

[0027] The rolling mechanism, which consists of a second movable plate, a second return spring, movable balls, and a fixed seat, is used to allow the bucket arm to rotate easily around the rotating mechanism 3.

[0028] Preferably, the first movable plate and the second movable plate have an arc-shaped cross-section, and they have the same shape and the same length as the rotating shaft. Furthermore, there are two of each movable plate symmetrically arranged inside the rotating shaft.

[0029] The first movable plate is connected to the rotating shaft via a first return spring, and the second movable plate is connected to the rotating shaft via a second return spring.

[0030] The positions of the extrusion block and the fixed seat correspond to the positions of the through hole, and both are movable structures inside the through hole. The top of the extrusion block has a rough surface that contacts the inner wall of the through hole of the bucket arm to increase friction.

[0031] The top of the fixed base is provided with a movable ball bearing, which contacts the inner wall of the perforated bucket arm to reduce friction.

[0032] Compared with the prior art, the beneficial effects of the present invention are: the emergency stop protection mechanism of the loader boom can automatically start when the loader boom fails, so as to achieve the effect of immediate control of the boom on the loader, ensuring that the boom does not fail and move downward, resulting in injury to personnel and damage to nearby equipment.

[0033] 1. A movable plate is installed on the outside of the rotating shaft. Under normal conditions, the movable plate is located on the outside of the rotating shaft and has no connection with it. When the boom outside the rotating shaft malfunctions, the movable plate will move towards the rotating shaft. During this movement, the intermediate shaft and the mounting base will engage. When the intermediate shaft and the mounting base are engaged, the driven gear will rotate under the drive gear, which will cause the rotating rod to rotate. When the rotating rod rotates, the rotating protrusion on its outside will rotate, which will actuate the first movable plate on the protrusion mechanism. This will push the extrusion block to move outward through the through hole. The top of the extrusion block will then press against the inner wall of the through hole on the outside of the boom, thus controlling the boom to continue rotating. This ensures that the boom can be quickly stopped in case of malfunction, preventing it from continuing to rotate and descend, which could cause damage.

[0034] 2. The entire mechanism is equipped with a linkage mechanism, which connects the rotating mechanisms at the connection points of each boom on the loader. Therefore, when one boom fails, the emergency stop mechanism can control all booms to work together, eliminating the need for operators to spend a lot of time judging the position and taking remedial measures. This minimizes the time of boom failure and ensures that the entire mechanism can control the boom to stop immediately, reducing the damage caused by the boom to the outside world. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the connection structure between the first bucket arm and the second bucket arm of the present invention;

[0036] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0037] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0038] Figure 4 This is a top view cross-sectional structural diagram of the connection between the first and second bucket arms of the present invention;

[0039] Figure 5 This is a top cross-sectional view of the connection between the linkage mechanism and the connecting mechanism of the present invention.

[0040] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0041] Figure 7This is a schematic diagram of the internal front cross-sectional structure of the rotating shaft of the present invention;

[0042] Figure 8 This is a schematic diagram of the main structure of the driving mechanism of the present invention.

[0043] In the picture:

[0044] 1. First bucket arm; 2. Second bucket arm;

[0045] 3. Rotating mechanism; 31. Rotating shaft; 32. Through hole; 33. Compression spring; 34. Moving plate; 35. Electromagnet;

[0046] 4. First telescopic cylinder; 5. Second telescopic cylinder; 6. Third telescopic cylinder; 7. Bucket;

[0047] 8. Drive mechanism; 81. Driving gear; 82. Driven gear; 83. Drive motor;

[0048] 9. Linkage mechanism; 91. Winding shaft; 92. Connecting chain; 93. Intermediate shaft; 94. Limiting block; 95. Limiting groove;

[0049] 10. Connecting mechanism; 1001. Mounting base; 1002. Rotating rod; 1003. Rotating protrusion

[0050] 11. Protruding mechanism; 1101. First movable plate; 1102. First return spring; 1103. Pressing block; 1104. Second movable plate; 1105. Second return spring; 1106. Movable ball; 1107. Fixed seat. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Please see Figure 1-8 The present invention provides a technical solution: an emergency stop protection mechanism for a loader boom, including a first boom 1, the bottom of which is connected to the loader body, and the angle change of which is controlled by a second telescopic cylinder 5;

[0053] The second bucket arm 2 is located at the top of the first bucket arm 1 and rotates with the first bucket arm 1 through a rotating mechanism 3. Its angle change is controlled by the first telescopic cylinder 4.

[0054] The bucket 7 is located at the top of the second boom 2 and rotates with the second boom 2 via a rotating mechanism 3. Its angle change is controlled by the third telescopic cylinder 6.

[0055] Also includes:

[0056] The drive mechanism 8, located outside the second bucket arm 2, is used to control the entire emergency stop device to perform mechanical work.

[0057] The emergency stop control mechanism is used to adjust the friction between the perforations on the first boom 1, the second boom 2, and the bucket 7 and the rotating mechanism 3, so that the first boom 1, the second boom 2, and the bucket 7 cannot rotate outside the rotating mechanism 3.

[0058] The emergency stop control mechanism includes a linkage mechanism 9, a connecting mechanism 10, and a protruding mechanism 11. The top of one side of the drive mechanism 8 is connected to the linkage mechanism 9. The top of the linkage mechanism 9 is connected to the connecting mechanism 10, and the connecting mechanism 10 is provided with a protruding mechanism 11 on its exterior.

[0059] Rotating mechanism 3 includes:

[0060] The rotating shaft 31 is disposed in the through holes at the top of the first bucket arm 1 and the second bucket arm 2, and four through holes 32 are disposed at equal angles on the outside of the rotating shaft 31, and two sets of the four through holes 32 are symmetrically disposed on the outside of the rotating shaft 31; specifically, this is to facilitate the extrusion block 1103 to slide out inside the through holes 32, so as to achieve the effect of extrusion against the inner wall of the through hole of the second bucket arm 2, thus preventing the rotation from stopping suddenly;

[0061] The moving mechanism consists of a compression spring 33, a moving plate 34, and an electromagnet 35. The rotating shaft 31 and the moving plate 34 are connected by the compression spring 33, and the electromagnet 35 is provided on the outside of the faces of the rotating shaft 31 and the moving plate 34. Specifically, this ensures that when the electromagnet 35 is energized, it can drive the moving plate 34 to move in the direction of the rotating shaft 31.

[0062] The drive mechanism 8 includes:

[0063] The drive motor 83 is located outside the second bucket arm 2, and the top end is coaxially connected to the drive gear 81;

[0064] The driven gear 82 is located below the driving gear 81 and meshes with the driving gear 81.

[0065] Linkage mechanism 9 includes:

[0066] The winding shaft 91 is coaxially connected to the driven gear 82, and the top end of the winding shaft 91 is also coaxially connected to the intermediate shaft 93, which is connected to the bearing in the middle position of the through hole 32.

[0067] The connecting chain 92 has one end wound around the outside of the winding shaft 91, and the other end wound around the winding shaft 91 on another linkage mechanism 9;

[0068] The limiting mechanism is used to connect the winding shaft 91 with the connecting mechanism 10, so that when the winding shaft 91 rotates, it drives the connecting mechanism 10 to rotate.

[0069] The connecting mechanism 10 includes:

[0070] Mounting base 1001 has a rotating rod 1002 at its top, and the rotating rod 1002 and mounting base 1001 are arranged in a "T" shape when viewed from above. The top position of mounting base 1001 corresponds to the position of intermediate shaft 93, and the top position of mounting base 1001 has a groove that engages with the top position of intermediate shaft 93.

[0071] Two rotating protrusions 1003 are symmetrically arranged in the middle of the rotating rod 1002, and the top of the rotating protrusions 1003 is arranged in an arc shape.

[0072] The limiting mechanism consists of limiting blocks 94 and limiting grooves 95. There are four limiting blocks 94 at equal angles on the outer top of the intermediate shaft 93, and four limiting grooves 95 at equal angles on the outer top of the mounting base 1001. The limiting grooves 95 and the limiting blocks 94 are engaged with each other. The outer side of the mounting base 1001 is connected to the outer side of the rotating shaft 31 by a torsion spring.

[0073] Specifically, when the limiting mechanisms are engaged, the rotating rod 1002 will rotate when it rotates around the scroll 91. When they are not engaged, the rotating rod 1002 cannot rotate.

[0074] The protruding mechanism 11 includes:

[0075] The emergency stop mechanism consists of a first movable plate 1101, a first return spring 1102, and a pressing block 1103, and is used to prevent the bucket arm from rotating around the rotating mechanism 3.

[0076] The rolling mechanism, which consists of a second movable plate 1104, a second return spring 1105, a movable ball 1106, and a fixed seat 1107, is used to enable the bucket arm to rotate easily around the rotating mechanism 3.

[0077] The first movable plate 1101 and the second movable plate 1104 have arc-shaped cross sections and the same shape. Their lengths are the same as the length of the rotating shaft 31, and there are two of each symmetrically arranged inside the rotating shaft 31.

[0078] The first movable plate 1101 is connected to the rotating shaft 31 by the first return spring 1102, and the second movable plate 1104 is connected to the rotating shaft 31 by the second return spring 1105.

[0079] The positions of the extrusion block 1103 and the fixed seat 1107 correspond to the positions of the through hole 32, and both are movable structures inside the through hole 32. The top of the extrusion block 1103 has a rough surface that contacts the inner wall of the through hole of the bucket arm to increase friction.

[0080] The top of the fixed base 1107 is provided with a movable ball 1106, which contacts the inner wall of the perforation of the bucket arm to reduce friction.

[0081] Specifically, the increased friction from the compression block 1103 allows the bucket arm to stop rotating abruptly, while the reduced friction from the movable ball bearing 1106 allows the bucket arm to rotate more smoothly without jamming.

[0082] Working principle: When using the emergency stop protection mechanism of the loader boom, firstly, the first boom 1 and the second boom 2 on the entire loader, as well as the second boom 2 and the bucket 7, are rotated by the rotating mechanism 3. The first boom 1 and the second boom 2 are rotated by the top of the first telescopic cylinder 4 pushing the top of the second boom 2, which is then rotated by the rotating mechanism 3. The second boom 2 and the bucket 7 are rotated by the top of the bucket 7 pushed by the third telescopic cylinder 6, which completes the rotation of the bucket 7 under the action of the rotating mechanism 3.

[0083] When a fault occurs between the first boom 1 and the second boom 2, or between the second boom 2 and the bucket 7, the electromagnet 35 on the rotating mechanism 3 will be energized. Since the electromagnet 35 is located on both the outside of the moving plate 34 and the rotating shaft 31, they attract each other, causing the moving plate 34 to move outwards from the rotating shaft 31. As the moving plate 34 moves, the intermediate shaft 93, which is located in the middle, also moves along with it. When the intermediate shaft 93 moves inwards, it causes the intermediate shaft 93 to... The limiting block 94 and the limiting groove 95 on the outside of the intermediate shaft 93 engage with each other. Then, the drive motor 83 starts. When the drive motor 83 starts, it drives the top drive gear 81 to rotate. When the drive gear 81 rotates, it meshes with the bottom driven gear 82, causing the driven gear 82 to rotate. The rotation of the driven gear 82 causes the intermediate shaft 93, which is coaxially connected to it, to rotate. Because the intermediate shaft 93 and the mounting base 1001 are limited by the limiting block 94 and the limiting groove 95, this causes… The mounting base 1001 rotates, which in turn drives the rotating rod 1002 at its top to rotate. This causes the rotating rod 1002 to drive the rotating protrusion 1003 on its outside to rotate, changing the rotating protrusion 1003 from a vertical position to a horizontal position. During this rotation, the top of the rotating protrusion 1003 releases its pressure on the second movable plate 1104. Then, the second movable plate 1104 returns to its original position under the action of the second return spring 1105, causing the fixing seat 1107 at the top of the second movable plate 1104 to rotate within the through hole 32. The internal movement of the rotating shaft 31 causes the movable ball 1106 at the top of the fixed seat 1107 to separate from the inner wall of the perforation on the bucket arm. At this time, since the top of the rotating protrusion 1003 has already pressed the position of the first movable plate 1101, the top of the first movable plate 1101 has pressed the pressing block 1103 to a position where it contacts and presses against the inner wall of the perforation on the bucket arm. Thus, under the action of the pressing block 1103, the friction of the perforation on the bucket arm will increase, ensuring that the bucket arm will not continue to rotate, thereby achieving the effect of emergency stop control of the bucket arm.

[0084] At the same time, when the driven gear 82 rotates, it will also cause the winding shaft 91 connected to it to rotate, causing the winding shaft 91 to rotate with the external connecting chain 92. At this time, since the electromagnets 35 on the rotating mechanism 3 between the second bucket arm 2 and the bucket 7 are also in a state of mutual attraction, when the connecting chain 92 rotates, its top will pull the second bucket arm 2 and the bucket 7 to rotate around the winding shaft 91, which will then cause the intermediate shaft 93 to rotate, achieving the effect of emergency stop control between the second bucket arm 2 and the bucket 7.

[0085] Finally, after the emergency stop control is completed, the loader is moved to a suitable position, and the power-off control electromagnets 35 are separated. This means that the intermediate shaft 93 no longer restricts the mounting base 1001. Therefore, the mounting base 1001 and the rotating shaft 31 are reset by the torsion spring, causing the rotating rod 1002 to reverse. The external rotating protrusion 1003 continues to press the second movable plate 1104, causing the movable ball 1106 at the top of the fixed seat 1107 on the second movable plate 1104 to contact the through hole at the top of the bucket arm. The presence of the movable ball 1106 reduces the friction between the bucket arm and the rotating shaft 31, allowing the bucket arm to fall and facilitating maintenance work. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0086] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An emergency stop protection mechanism for a loader boom, comprising: The first bucket arm (1) is connected to the loader body at its bottom, and its angle change is controlled by the second telescopic cylinder (5); The second bucket arm (2) is located at the top of the first bucket arm (1). It rotates with the first bucket arm (1) through a rotating mechanism (3), and its angle change is controlled by the first telescopic cylinder (4). The bucket (7) is located at the top of the second bucket arm (2), and it rotates with the second bucket arm (2) through a rotating mechanism (3). Its angle change is controlled by a third telescopic cylinder (6). Its features are: Also includes: The drive mechanism (8), located outside the second bucket arm (2), is used to control the entire emergency stop device to perform mechanical work; The emergency stop control mechanism is used to adjust the friction between the perforations on the first boom (1), the second boom (2) and the bucket (7) and the rotating mechanism (3) so that the first boom (1), the second boom (2) and the bucket (7) cannot rotate outside the rotating mechanism (3); The emergency stop control mechanism includes a linkage mechanism (9), a connecting mechanism (10) and a protruding mechanism (11), and the top of one side of the drive mechanism (8) is connected to the linkage mechanism (9). The top of the linkage mechanism (9) is connected to the connecting mechanism (10), and the connecting mechanism (10) is provided with a protruding mechanism (11) on its outside. The drive mechanism (8) includes: The drive motor (83) is located outside the second bucket arm (2), and the top end is coaxially connected to the drive gear (81). The driven gear (82) is located below the driving gear (81) and meshes with the driving gear (81); The linkage mechanism (9) includes: The winding shaft (91) is coaxially connected to the driven gear (82), and the top end of the winding shaft (91) is also coaxially connected to an intermediate shaft (93), which is connected to the bearing at the middle position of the through hole (32). The connecting chain (92) has one end wound around the outside of the winding shaft (91) and the other end wound around the winding shaft (91) on another linkage mechanism (9); The limiting mechanism is used to connect the winding shaft (91) and the connecting mechanism (10) so that when the winding shaft (91) rotates, it drives the connecting mechanism (10) to rotate. The connecting mechanism (10) includes: Mounting base (1001) has a rotating rod (1002) at its top, and the rotating rod (1002) and mounting base (1001) are arranged in a "T" shape when viewed from above. The top position of mounting base (1001) corresponds to the position of intermediate shaft (93), and the top of mounting base (1001) has a groove that engages with the top of intermediate shaft (93). Two rotating protrusions (1003) are symmetrically arranged in the middle of the rotating rod (1002), and the top of the rotating protrusions (1003) is arranged in an arc shape. The limiting mechanism consists of limiting blocks (94) and limiting grooves (95). There are four limiting blocks (94) at equal angles on the outer top of the intermediate shaft (93), and four limiting grooves (95) at equal angles on the outer top of the mounting base (1001). The limiting grooves (95) and the limiting blocks (94) are engaged with each other. The outer side of the mounting base (1001) is connected to the outer side of the rotating shaft (31) by a torsion spring. The protruding mechanism (11) includes: The emergency stop mechanism consists of a first movable plate (1101), a first return spring (1102), and a pressing block (1103), and is used to prevent the bucket arm from rotating around the rotating mechanism (3). The rolling mechanism consists of a second movable plate (1104), a second return spring (1105), a movable ball (1106), and a fixed seat (1107), which is used to enable the bucket arm to rotate easily around the rotating mechanism (3). The first movable plate (1101) and the second movable plate (1104) have arc-shaped cross sections and the same shape. Their lengths are the same as the length of the rotating shaft (31), and there are two of each symmetrically arranged inside the rotating shaft (31). The first movable plate (1101) is connected to the rotating shaft (31) by a first return spring (1102), and the second movable plate (1104) is connected to the rotating shaft (31) by a second return spring (1105). The rotating mechanism (3) includes: A rotating shaft (31) is provided in the through holes at the top of the first bucket arm (1) and the second bucket arm (2), and four through holes (32) are provided at equal angles on the outside of the rotating shaft (31), and two sets of four through holes (32) are symmetrically provided on the outside of the rotating shaft (31). The moving mechanism consists of a compression spring (33), a moving plate (34) and an electromagnet (35). The rotating shaft (31) and the moving plate (34) are connected by the compression spring (33), and an electromagnet (35) is provided on the outside of the faces of the rotating shaft (31) and the moving plate (34). The positions of the extrusion block (1103) and the fixed seat (1107) correspond to the positions of the through hole (32), and both are movable structures inside the through hole (32). The top of the extrusion block (1103) has a rough surface that contacts the inner wall of the through hole of the bucket arm to increase friction. The top of the fixed seat (1107) is provided with a movable ball (1106), which contacts the inner wall of the perforated bucket arm to reduce friction.

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