An outrigger limit fixing structure with a buffer device

Abstract

The present invention discloses a boom limit fixing structure with a buffer device, which relates to the field of tunnel engineering equipment and includes: a fixed seat, a gripper, a reset device, and a buffer device; a vertically slidable rack is provided on the fixed seat; one end of the gripper is a gear end provided with a gear, the gear end is hinged to the fixed seat, and the rack can drive the gear to rotate; the reset device provides a reset force for the gripper; the buffer device provides buffering for the gripper; in the present invention, due to the existence of the rack and gear transmission, the gripper will automatically tighten while the boom is being lowered, and the gripper will open under the pulling force of the reset spring when the boom is lifted, enabling the boom to be lifted normally; at the same time, due to the setting of the guide groove and the torsion spring, the torsion spring slides along a preset track, providing buffering for the gripper.

Description

Technical Field

[0001] The present invention relates to the field of tunnel engineering equipment, and particularly to a boom limit fixing structure with a buffer device. Background Art

[0002] In tunneling equipment, most of the equipment equipped with booms is provided with corresponding boom limit fixing structures; however, due to the large mass of the boom, a large impact force will be generated during the falling or lifting process of the boom, resulting in easy damage to the covering parts, which is quite unfavorable for the safety of the equipment and personnel; and the existing boom limit fixing structures are simple, and the fixing of the boom cannot meet the actual operation requirements. Summary of the Invention

[0003] The purpose of the present invention is to: in view of the problem that the existing boom limit fixing structure is simple, the fixing of the boom cannot meet the actual operation requirements, resulting in easy damage to the covering parts, a boom limit fixing structure with a buffer device is provided, which optimizes and improves the existing structural deficiencies and solves the boom storage problem.

[0004] The technical solution of the present invention is as follows:

[0005] A boom limit fixing structure with a buffer device specifically includes the following structures:

[0006] A fixed seat, on which a rack that can slide up and down is provided, and during the falling process of the boom, it can drive the rack to slide downwards;

[0007] A gripper, one end of which is a gear end provided with a gear, and the gear end is hinged on the fixed seat; during the downward sliding process of the rack, it drives the gear to rotate, so that the gripper rotates towards the boom direction around the hinge point; when the boom completely falls, the gripper changes from the initial state to the limit state, completing the limit fixing of the boom; at this time, the boom is always in contact with the rack, applying a downward pressure on the rack; preferably, the gear end is arranged on the fixed seat through a rotating shaft, and the gear engages with the teeth on the rack, and as the rack moves up and down, it can drive the gear to rotate, thereby driving the gripper to rotate around the hinge point (i.e., the rotating shaft);

[0008] A reset device, which provides a reset force for the gripper. During the lifting process of the boom, under the action of the reset device, the gripper rotates away from the boom direction around the hinge point, and the gripper changes from the limit state to the initial state, completing the lifting of the boom;

[0009] A buffer device, which provides motion buffering for the gripper during the falling and / or lifting process of the boom.

[0010] Furthermore, a chute is provided on the fixed seat, and the rack is located in the chute and can slide up and down;

[0011] The other end of the gripper is a limiting end. When the gripper is in a limiting state, the limiting end is located above the arm frame to limit the arm frame from moving upward.

[0012] Further, the reset device comprises: a reset spring;

[0013] One end of the return spring is connected to the gripper, and the other end is connected to the rack;

[0014] During the boom's lowering process, the return spring stretches and stores its elastic deformation as elastic potential energy; during the boom's lifting process, the boom continues to move upward, allowing the rack to have a certain amount of space to rise. At this time, the return spring gradually returns to its original length, and the elastic potential energy is converted into kinetic energy, driving the gripper to rotate around the hinge point away from the boom; as the boom continues to move upward, the gripper is eventually fully opened and is in its initial state.

[0015] Further, the hinge point is located at the center of the gear;

[0016] The gripper is in a concave shape, the middle part of the gripper is a connecting part, and the gear end and the limit end are respectively located at two ends of the connecting part;

[0017] The rack is provided with teeth matching the gear above, and a first mounting portion for mounting a return spring is provided below;

[0018] A second mounting portion for mounting a return spring is provided on the gear end and at one end away from the rack;

[0019] One end of the return spring is connected to the first mounting portion, and the other end is connected to the second mounting portion; preferably, both the first mounting portion and the second mounting portion are protruding small round holes.

[0020] Furthermore, there are two grippers, which are respectively located on both sides of the rack;

[0021] During the boom's lowering process, the two grippers close to limit the boom between the two grippers, thus completing the limited position fixation of the boom; that is, as the boom falls, the rack is pushed downward, driving the grippers to rotate around the hinge point, so that the two grippers gradually close to complete the limited position fixation of the boom;

[0022] During the lifting process of the boom, the two grippers open, and the boom is lifted from the middle of the two grippers to complete the lifting of the boom; that is, as the boom is lifted, the grippers rotate around the hinge points under the action of the reset springs, so that the two grippers gradually open to complete the lifting of the boom; due to the existence of the rack and gear transmission, the grippers will automatically hold tight while the boom is lowered, and will automatically open under the pulling force of the reset springs when the boom is lifted.

[0023] Further, the buffer device includes: a guide groove and a torsion spring provided at the bottom of the rack, and a preset track is provided in the guide groove;

[0024] One end of the torsion spring is connected to the fixed seat, and the other end is provided with a slider that can slide in the guide groove according to the preset track;

[0025] When the boom completely falls, the slider is located at the uppermost end of the preset track, and the torsion spring is in a natural state or a compressed state; in order to ensure that the torsion spring is always in a compressed state during the small lifting process of the boom, a stable buffer is provided for the gripper.

[0026] Further, the uppermost end of the preset track is point A, the lowermost end is point C, and the middle part is point B; among them, point B is used as the critical point;

[0027] During the lifting process of the boom, the slider slides from point A to point B, and then slides from point B to point C; among them, when the slider slides from point A to point B, the torsion spring is gradually compressed, and during this process, the torsion spring exerts an obliquely downward pressure on the rack to offset a part of the restoring force; when the slider slides from point B to point C, the torsion spring gradually returns to its original state, and during this process, the torsion spring exerts an obliquely upward pressure on the rack to assist the gripper to change from the limited state to the initial state; that is, during the lifting process of the boom, a buffer is provided for the gripper.

[0028] Further, the preset track is in an S shape;

[0029] During the falling process of the boom, the slider slides from point C to point B, and then slides from point B to point A; among them, when the slider slides from point C to point B, the torsion spring is gradually compressed, and during this process, the torsion spring exerts an obliquely upward pressure on the rack to offset a part of the pressure of the falling boom; when the slider slides from point B to point A, the torsion spring gradually returns to its original state, and during this process, the torsion spring exerts an obliquely downward pressure on the rack to assist the gripper to change from the initial state to the limited state; that is, during the falling process of the boom, a buffer is provided for the gripper.

[0030] Further, the preset track is triangular;

[0031] During the falling process of the boom, the slider slides directly from point C to point A.

[0032] Further, the preset track is semicircular;

[0033] During the falling process of the boom, the slider slides directly from point C to point A.

[0034] Compared with the existing technology, the beneficial effects of the present invention are:

[0035] An arm support limit fixing structure with a buffer device. Due to the presence of rack and pinion transmission, when the arm support is lowered, the gripper will automatically close tightly. When the arm support is lifted, the gripper will open under the pulling force of the return spring, enabling the arm support to be lifted normally. At the same time, due to the setting of the guide groove and the torsion spring, the torsion spring slides along a preset trajectory, providing buffering for the gripper. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. 6 is a schematic structural view of an arm support limit fixing structure with a buffer device in an initial state;

[0037] Figure 2 FIG. 10 is a schematic structural view of an arm support limit fixing structure with a buffer device in a limit state;

[0038] Figure 3 FIG. 14 is a schematic structural view of the guide groove in Embodiment 2;

[0039] Figure 4 FIG. 18 is a schematic structural view of the guide groove in Embodiment 3;

[0040] Figure 5 FIG. 22 is a schematic structural view of the guide groove in Embodiment 4.

[0041] Reference numerals: 1 - fixed seat, 2 - rack, 3 - gripper, 4 - gear end, 5 - limit end, 6 - return spring, 7 - connecting part, 8 - guide groove, 9 - torsion spring, 10 - torsion spring fixed seat, 11 - slider, 12 - arm support. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including an..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0043] The features and performance of the present invention will be further described in detail below in conjunction with the embodiments.

[0044] Embodiment 1

[0045] In tunneling equipment, most equipment equipped with a boom is provided with a corresponding boom limit fixing structure; however, due to the large mass of the boom, a large impact force will be generated during the lowering or lifting process of the boom, resulting in easy damage to the covering parts, which is quite unfavorable for the safety of the equipment and personnel; and the existing boom limit fixing structure is simple, and the fixing of the boom cannot meet the actual operation requirements.

[0046] In this embodiment, in view of the above problems, a boom limit fixing structure with a buffer device is proposed, which optimizes and improves the existing structural deficiencies and solves the boom storage problem.

[0047] Please refer to Figures 1-5 , a boom 12 limit fixing structure with a buffer device, specifically including the following structures:

[0048] Fixed seat 1, on which a vertically slidable rack 2 is provided. During the lowering process of the boom 12, the rack 2 can be driven to slide downward.

[0049] Gripper 3, one end of the gripper 3 is a gear end 4 provided with a gear. The gear end 4 is hinged on the fixed seat 1. During the downward sliding process of the rack 2, the gear is driven to rotate, so that the gripper 3 rotates around the hinge point towards the direction close to the boom 12; when the boom 12 is completely lowered, the gripper 3 changes from the initial state to the limit state, completing the limit fixing of the boom 12; at this time, the boom 12 is always in contact with the rack 2 and applies a downward pressure to the rack 2; preferably, the gear end 4 is arranged on the fixed seat 1 through a rotating shaft, and the gear engages with the teeth on the rack 2. As the rack 2 moves up and down, the gear can be driven to rotate, thereby driving the gripper 3 to rotate around the hinge point (i.e., the rotating shaft).

[0050] Reset device, which provides a reset force for the gripper 3. During the lifting process of the boom 12, under the action of the reset device, the gripper 3 rotates around the hinge point towards the direction away from the boom 12, and the gripper 3 changes from the limit state to the initial state, completing the lifting of the boom 12.

[0051] Buffer device, which provides motion buffering for the gripper during the lowering and / or lifting process of the boom 12.

[0052] In this embodiment, specifically, a chute is provided on the fixed seat 1, and the rack 2 is located in the chute and can slide up and down.

[0053] The other end of the gripper 3 is a limit end 5. When the gripper 3 is in the limit state, the limit end 5 is located above the boom 12 to limit the upward movement of the boom 12.

[0054] In this embodiment, specifically, the reset device includes: a reset spring 6;

[0055] One end of the reset spring 6 is connected to the gripper 3, and the other end is connected to the rack 2;

[0056] During the lowering process of the boom 12, the reset spring 6 elongates and stores its elastic deformation as elastic potential energy; during the lifting process of the boom 12, since the boom 12 continues to move upward, the rack 2 has a certain upward space. At this time, the reset spring 6 gradually returns to its original length, and the elastic potential energy is converted into kinetic energy, driving the gripper 3 to rotate away from the boom 12 around the hinge point; as the boom 12 continues to move upward, the gripper 3 finally fully opens and is in the initial state.

[0057] In this embodiment, specifically, the gripper 3 is in a concave shape, the middle part of the gripper 3 is the connecting part 7, and the gear end 4 and the limiting end 5 are respectively located at both ends of the connecting part 7;

[0058] Teeth meshing with the gear are provided above the rack 2, and a first mounting portion for mounting the reset spring 6 is provided below;

[0059] On the gear end 4, and at one end far from the rack 2, a second mounting portion for mounting the reset spring 6 is provided;

[0060] One end of the reset spring 6 is connected to the first mounting portion, and the other end is connected to the second mounting portion; preferably, both the first mounting portion and the second mounting portion are protruding small round holes.

[0061] In this embodiment, specifically, there are two grippers 3, which are respectively located on both sides of the rack 2;

[0062] During the lowering process of the boom 12, the two grippers 3 close, limiting the boom 12 between the two grippers 3 to complete the limit fixation of the boom 12; that is, as the boom 12 drops, it pushes the rack 2 to move downward, driving the gripper 3 to rotate around the hinge point, so that the two grippers 3 gradually close to complete the limit fixation of the boom 12;

[0063] During the lifting process of the boom 12, the two grippers 3 open, and the boom 12 is lifted from between the two grippers 3 to complete the lifting of the boom 12; that is, as the boom 12 is lifted, the gripper 3 rotates around the hinge point under the action of the reset spring 6, so that the two grippers 3 gradually open to complete the lifting of the boom 12; due to the existence of the rack 2 and gear transmission, the gripper 3 will automatically hold tightly when the boom 12 is lowered, and the gripper 3 automatically opens under the pulling force of the reset spring 6 when the boom 12 is lifted.

[0064] In this embodiment, specifically, the buffer device includes: a guide groove 8 and a torsion spring 9 provided at the bottom of the rack 2, and a preset track is provided in the guide groove 8;

[0065] One end of the torsion spring 9 is connected to the fixed seat 1, and the other end is provided with a slider 11 that can slide in the guide groove 8 along a preset trajectory; preferably, a torsion spring fixed seat 10 is arranged on the fixed seat 1, and one end of the torsion spring 9 is fixed on the torsion spring fixed seat 10;

[0066] When the boom 12 is fully lowered, the slider 11 is located at the uppermost end of the preset trajectory, and the torsion spring 9 is in a natural state or a compressed state; in order to ensure that the torsion spring 9 is always in a compressed state during the small-amplitude lifting process of the boom 12, a stable buffer is provided for the gripper 3.

[0067] In this embodiment, specifically, the uppermost end of the preset trajectory is point A, the lowermost end is point C, and the middle part is point B; among them, point B is used as a critical point; the directions of the forces exerted by the torsion spring 9 on the rack 2 in the AB section and the BC section are opposite;

[0068] During the lifting process of the boom 12, the slider 11 slides from point A to point B, and then slides from point B to point C; among them, when the slider 11 slides from point A to point B, the torsion spring 9 is gradually compressed, and during this process, the torsion spring 9 exerts an obliquely downward pressure on the rack 2 to offset a part of the reset force; when the slider 11 slides from point B to point C, the torsion spring 9 gradually returns to its original state, and during this process, the torsion spring 9 exerts an obliquely upward pressure on the rack 2 to assist the gripper 3 to change from the limited state to the initial state; that is, during the lifting process of the boom 12, a buffer is provided for the gripper; at the same time, due to the arrangement of the torsion spring 9 and the guide groove 8, it is ensured that the gripper 3 will not be directly opened and always remains in the limited state during the rapid small-amplitude lifting process of the boom 12.

[0069] Embodiment Two

[0070] Embodiment Two is a further description of Embodiment One. The same components will not be elaborated here. Please refer to Figure 3 , the preset trajectory is in an S shape;

[0071] During the lowering process of the boom 12, the slider 11 slides from point C to point B, and then slides from point B to point A; among them, when the slider 11 slides from point C to point B, the torsion spring 9 is gradually compressed, and during this process, the torsion spring 9 exerts an obliquely upward pressure on the rack 2 to offset a part of the pressure of the boom 12 falling; when the slider 11 slides from point B to point A, the torsion spring 9 gradually returns to its original state, and during this process, the torsion spring 9 exerts an obliquely downward pressure on the rack 2 to assist the gripper 3 to change from the initial state to the limited state; that is, during the lowering process of the boom 12, a buffer is provided for the gripper 3.

[0072] Embodiment Three

[0073] Embodiment Three is a further description of Embodiment One. The same components will not be elaborated here. Please refer to Figure 4 , the preset trajectory is triangular in shape;

[0074] During the falling process of the boom 12, the slider 11 slides directly from point C to point A; preferably, in order to ensure the one-way sliding of the slider 11, the AB section, the BC section, and the AC section are all inclined slopes. It should be noted that the specific heights of the slopes can be directly set by those skilled in the art according to the design requirements, and will not be elaborated here.

[0075] Embodiment 4

[0076] Embodiment 4 is a further description of Embodiment 1. The same components will not be elaborated here. Please refer to Figure 5 , the preset trajectory is semicircular;

[0077] During the falling process of the boom 12, the slider 11 slides directly from point C to point A; preferably, in order to ensure the one-way sliding of the slider 11, the AC section and the ABC section are all inclined slopes. It should be noted that the specific heights of the slopes can be directly set by those skilled in the art according to the design requirements, and will not be elaborated here.

[0078] The above-described embodiments only represent the specific implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. An outrigger limit fixing structure with a buffer device, characterized in that, Comprising: A fixed seat (1), on which a vertically slidable rack (2) is provided. During the lowering process of the boom (12), the rack (2) can be driven to slide downward. A gripper (3), one end of which is a gear end (4) provided with a gear. The gear end (4) is hinged to the fixed seat (1). During the downward sliding process of the rack (2), the gear is driven to rotate, causing the gripper (3) to rotate around the hinge point towards the boom (12). A reset device, which provides a reset force for the gripper (3). During the lifting process of the boom (12), under the action of the reset device, the gripper (3) rotates around the hinge point away from the boom (12). A buffer device, which provides motion buffering for the gripper (3) during the lowering and / or lifting process of the boom (12). The buffer device includes: a guide groove (8) and a torsion spring (9) provided at the bottom of the rack (2). A preset track is provided in the guide groove (8). One end of the torsion spring (9) is connected to the fixed seat (1), and the other end is provided with a slider (11) that can slide in the guide groove (8) according to the preset track. When the boom (12) is fully lowered, the slider (11) is located at the uppermost end of the preset track, and the torsion spring (9) is in a natural state or a compressed state. The uppermost end of the preset track is point A, the lowermost end is point C, and the middle part is point B. During the lifting process of the boom (12), the slider (11) slides from point A to point B and then from point B to point C. Among them, when the slider (11) slides from point A to point B, the torsion spring (9) is gradually compressed. During this process, the torsion spring (9) exerts an obliquely downward pressure on the rack (2) to offset part of the reset force. When the slider (11) slides from point B to point C, the torsion spring (9) gradually returns to its original state. During this process, the torsion spring (9) exerts an obliquely upward pressure on the rack (2) to assist the gripper (3) to change from the limited state to the initial state.

2. The boom limit fixing structure with a buffer device according to claim 1, characterized in that, A chute is provided on the fixed seat (1). The rack (2) is located in the chute and can slide up and down. The other end of the gripper (3) is a limit end (5). When the gripper (3) is in the limited state, the limit end (5) is located above the boom (12) to limit the upward movement of the boom (12).

3. The boom limit fixing structure with a buffer device according to claim 2, characterized in that, The reset device includes: a reset spring (6). One end of the reset spring (6) is connected to the gripper (3), and the other end is connected to the rack (2). During the lowering process of the boom (12), the reset spring (6) elongates and stores elastic potential energy. During the lifting process of the boom (12), the reset spring (6) returns to its original length, and the elastic potential energy is converted into kinetic energy to drive the gripper (3) to rotate around the hinge point away from the boom (12).

4. The boom limit fixing structure with a buffer device according to claim 3, characterized in that The hinge point is located at the center of the gear. The gripper (3) is in a concave shape. The middle part of the gripper (3) is a connecting part (7). The gear end (4) and the limit end (5) are respectively located at both ends of the connecting part (7). Teeth meshing with the gear are provided above the rack (2), and a first mounting part for mounting the reset spring (6) is provided below. On the gear end (4), and at one end far from the rack (2), there is a second mounting portion for mounting the return spring (6). One end of the return spring (6) is connected to the first mounting portion, and the other end is connected to the second mounting portion.

5. The boom limit fixing structure with a buffer device according to claim 1, characterized in that, There are two grippers (3), which are respectively located on both sides of the rack (2). During the falling process of the boom (12), the two grippers (3) close, and the boom (12) is limited between the two grippers (3), completing the limit fixation of the boom (12). During the lifting process of the boom (12), the two grippers (3) open, and the boom (12) is lifted from between the two grippers (3), completing the lifting of the boom (12).

6. A boom limit fixing structure with a buffer device according to any one of claims 1-5, characterized in that, The preset trajectory is in an S shape. During the falling process of the boom (12), the slider (11) slides from point C to point B, and then slides from point B to point A. Among them, when the slider (11) slides from point C to point B, the torsion spring (9) is gradually compressed. During this process, the torsion spring (9) exerts an obliquely upward pressure on the rack (2) to offset part of the pressure of the falling boom (12). When the slider (11) slides from point B to point A, the torsion spring (9) gradually returns to its original state. During this process, the torsion spring (9) exerts an obliquely downward pressure on the rack (2) to assist the gripper (3) to change from the initial state to the limit state.

7. A boom limit fixing structure with a buffer device according to any one of claims 1-5, characterized in that, The preset trajectory is triangular in shape. During the falling process of the boom (12), the slider (11) slides directly from point C to point A.

8. A boom limit fixing structure with a buffer device according to any one of claims 1-5, characterized in that, The preset trajectory is semi-circular in shape. During the falling process of the boom (12), the slider (11) slides directly from point C to point A.

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