Arm support adjusting and positioning mechanism

Abstract

The utility model discloses a cantilever crane adjusting and positioning mechanism which comprises a bottom frame body, connecting seats are fixed to the top faces of the left portion and the right portion of a front transverse beam of the bottom frame body, the two connecting seats are movably connected with two main supporting arms extending upwards through hinge shafts, the same upper connecting seat is fixed to the tops of the two main supporting arms, and the upper connecting seat is movably connected with the two main supporting arms through hinge shafts. The rear portion of the upper connecting seat is movably connected with two inclined supporting arms through hinge shafts, the bottoms of the two inclined supporting arms are movably connected with lower moving seats through hinge shafts, and side supporting frames are fixed to the bottom faces of the left portions and the right portions of bottom plates of the two lower moving seats. Through linkage of the pushing oil cylinder and the positioning oil cylinder, the lower moving base moves backwards to the corresponding position at a time and is automatically fixed, and the inclination angle of the inclined supporting arm is changed, so that the front-back position of the upper guide wheel is changed, the adjusting requirement is met, manual operation is not needed, the manual labor amount is greatly reduced, and operation is convenient.

Description

Technical Field:

[0001] The utility model relates to the technical field of lifting equipment, and more specifically to a boom adjusting and positioning mechanism. Background Art:

[0002] For some existing underwater pipe tunnels that need to be installed in rivers, before the installation of the immersed tube, it is necessary to rock drill and level the immersed tube bedrock; it is necessary to set up a hull, install a rock drilling device on the hull, and perform rock drilling and leveling through the rock drilling device;

[0003] In the existing rock drilling device, the position of the hammer head needs to be adjusted back and forth. The adjustment structure is to change the front and back positions of the upper guide pulley of the wire rope supporting the hammer head, so as to change the front and back positions of the hammer head;

[0004] The upper guide pulley is installed on the connecting seat at the upper part of the boom. The boom is composed of a front arm and a rear arm that are movably connected. The bottom of the front arm is movably connected to the chassis through a hinge shaft. The bottom end of the rear wall is movably connected to a moving seat. The moving seat is fixed to the chassis through a pin shaft. At the same time, a pushing oil cylinder is installed at the front part of the moving seat. The push rod of the pushing oil cylinder is installed on the moving seat. After the pin shaft can be pulled out, it is pushed by the push rod of the pushing oil cylinder, so that the bottom of the rear arm moves backward, thereby changing the inclination angle of the rear arm, and thus changing the front and back positions of the upper guide pulley. However, the existing pushing oil cylinder can only push a small section of position, and after the moving position is completed, the moving seat needs to be fixed to the chassis through a pin shaft. Then, the connecting parts such as the pin of the connecting seat of the pushing oil cylinder and the base are pulled out, and the push rod of the pushing oil cylinder retracts, which makes the whole pushing oil cylinder move backward. Then, the connecting seat of the pushing oil cylinder is fixed to the chassis with a pin, the pin shaft of the moving seat is pulled out, pushed by the push rod of the pushing oil cylinder, and the moving seat at the bottom of the rear arm is moved backward a certain distance. Its operation is troublesome, the movement is troublesome, and the manual labor is very large. Content of the Utility Model:

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a boom adjusting and positioning mechanism. Through the linkage of a pushing oil cylinder and a positioning oil cylinder, the lower moving seat is moved backward to the corresponding position at one time and automatically fixed, realizing the change of the inclination angle of the diagonal support arm, so as to change the front and back positions of the upper guide pulley, meet the adjustment needs, and it does not require manual operation, greatly reducing the manual labor and being convenient to operate.

[0006] The solution for the utility model to solve the technical problem is:

[0007] An arm support adjusting and positioning mechanism includes a bottom frame body. Connection seats are fixed on the top surfaces of the left and right parts of the front transverse beam of the bottom frame body. Two upward-extending main support arms are movably connected to the two connection seats through a hinge shaft. The tops of the two main support arms are fixed to the same upper connection seat. The rear part of the upper connection seat is movably connected to two diagonal support arms through a hinge shaft. The bottoms of the two diagonal support arms are movably connected to lower moving seats through a hinge shaft. Side support frames are fixed on the bottom surfaces of the left and right parts of the bottom plates of the two lower moving seats. Positioning through holes are formed on the side support frames. Through holes extending left and right are provided in the middle parts of two front-and-rear extending connection support beams on the left and right parts of the bottom frame body. A positioning oil cylinder is installed on the outer side wall of one of the side support frames of each lower moving seat. The positioning column fixed to the end of the push rod of the positioning oil cylinder is inserted into the corresponding positioning through hole and corresponds to the corresponding through hole.

[0008] Through holes that are aligned left and right are formed on the two outer side plates in the middle and the two reinforcing plates inside the connection support beam. The corresponding left-and-right aligned through holes form a through hole. A left-and-right extending connection positioning tube is inserted into the through hole. The outer side wall of the connection positioning tube is welded and fixed to the inner side wall of the through hole;

[0009] Both the left and right ends of the connection positioning tube extend out of the outer side plates on the left and right sides of the corresponding connection support beam. The positioning through hole corresponds to the corresponding connection positioning tube. The bottom surface of the bottom plate of the lower moving seat is pressed against the top surface of the corresponding connection support beam. The two side support frames are at the left or right side of the connection support beam. A positioning oil cylinder is installed on the outer side wall of one of the side support frames. The positioning column fixed to the end of the push rod of the positioning oil cylinder corresponds to the middle through hole of the corresponding connection positioning tube.

[0010] A guiding sleeve part is fixed on the outer side wall of one of the side support frames. A positioning oil cylinder is fixedly connected to the flange on the outer end surface of the guiding sleeve part through bolts. A positioning column is fixed to the end of the push rod of the positioning oil cylinder. The positioning column is inserted into the corresponding guiding sleeve part. The end of the positioning column is inserted into the corresponding positioning through hole. The outer side wall of the positioning column is close to the inner side wall of the corresponding guiding sleeve part.

[0011] An oil cylinder connection seat is fixed in the middle of the front part of the bottom frame body. The middle part of the pushing oil cylinder is installed on the oil cylinder connection seat. The rear end of the push rod of the pushing oil cylinder is movably connected to the front part of the lower moving seat through a hinge shaft.

[0012] The pushing oil cylinder is an oil cylinder installed with an internal displacement sensor.

[0013] The prominent effect of the present utility model is:

[0014] Compared with the prior art, through the linkage of the pushing oil cylinder and the positioning oil cylinder, it realizes that the lower moving seat moves backward to the corresponding position at one time and is automatically fixed, and realizes the change of the inclination angle of the inclined support arm, so that the front and rear positions of the upper guide wheel are changed to meet the adjustment requirements. It does not require manual operation, greatly reduces the manual labor amount, and is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS:

[0015] Figure 1 is a schematic diagram of a partial structure of the present utility model;

[0016] Figure 2 is Figure 1 a partial enlarged view of

[0017] Figure 3 is a schematic diagram of a partial structure between two main support arms of the present utility model;

[0018] Figure 4 is a schematic diagram of a partial structure between two inclined support arms of the present utility model;

[0019] Figure 5 is a schematic diagram of a partial structure between the bottom of the inclined support arm and the lower moving seat;

[0020] Figure 6 is Figure 5 a partial enlarged view of DETAILED DESCRIPTION OF THE EMBODIMENTS:

[0021] In an embodiment, as shown in Figures 1 to 6 a boom adjusting and positioning mechanism includes a bottom frame body 10. Connecting seats are fixed on the top surfaces of the left and right parts of the front transverse beam of the bottom frame body 10. Two upward extending main support arms 21 are movably connected by a hinge shaft through the two connecting seats. The tops of the two main support arms 21 are fixed to the same upper connecting seat. Two upper guide wheels 1 are movably connected to the upper connecting seat by a hinge shaft. The upper guide wheel 1 is used for the winding support of the rope connected to the hammer head.

[0022] Furthermore, the rear part of the upper connecting seat is movably connected with two inclined support arms 22 by a hinge shaft. The bottoms of the two inclined support arms 22 are movably connected with a lower moving seat 23 by a hinge shaft. Side support frames 231 are fixed on the bottom surfaces of the left and right parts of the bottom plates of the two lower moving seats 23. Positioning through holes are formed on the side support frames 231. Multiple through holes extending left and right are provided in the middle of the two front and rear extending connecting support beams 27 on the left and right parts of the bottom frame body 10. A positioning oil cylinder 28 is installed on the outer side wall of one of the side support frames 231 of each lower moving seat 23. The positioning column 281 fixed to the end of the push rod of the positioning oil cylinder 28 is inserted into the corresponding positioning through hole and corresponds to the corresponding through hole.

[0023] On the left and right outer plates and the two inner reinforcing plates in the middle of the connecting support beam 27, through holes that are aligned left and right are formed. The corresponding through holes that are aligned left and right form a through-through hole, and the connecting positioning tube 25 extending left and right is inserted into the through-through hole. The outer side wall of the connecting positioning tube 25 is welded and fixed to the inner side wall of the through hole;

[0024] Both the left and right ends of the connecting positioning tube 25 extend out of the outer plates on the left and right sides of the corresponding connecting support beam 27. The positioning through hole corresponds to the corresponding connecting positioning tube 25. The bottom surface of the bottom plate of the lower moving seat 23 presses against the top surface of the corresponding connecting support beam 27. The two side support frames 231 are located on the left or right side of the connecting support beam 27. A positioning oil cylinder 28 is installed on the outer side wall of one of the side support frames 231. The positioning column 281 fixed to the end of the push rod of the positioning oil cylinder 28 corresponds to the middle through hole of the corresponding connecting positioning tube 25.

[0025] Furthermore, a plurality of transverse connecting rods 26 are fixed between the two main support arms 21. The two ends of the transverse connecting rod 26 are fixed on the opposite wall surfaces of the two main support arms 21. The transverse connecting rod 26 can improve the fixing firmness between the two main support arms 21.

[0026] A guiding sleeve part 232 is fixed on the outer side wall of one of the side support frames 231. The flange on the outer end surface of the guiding sleeve part 232 is fixedly connected with a positioning oil cylinder 28 through bolts. A positioning column 281 is fixed to the end of the push rod of the positioning oil cylinder 28. The positioning column 281 is inserted into the corresponding guiding sleeve part 232. The end of the positioning column 281 is inserted into the corresponding positioning through hole. The outer side wall of the positioning column 281 is close to the inner side wall of the corresponding guiding sleeve part 232.

[0027] A polytetrafluoroethylene plate 2 is fixed to the bottom surface of the lower moving seat 23. The bottom surface of the polytetrafluoroethylene plate 2 presses against the top surface of the corresponding connecting support beam 27. It can ensure that the lower moving seat 23 moves normally along the top surface of the corresponding connecting support beam 27, reducing friction and wear.

[0028] Furthermore, an oil cylinder connecting seat 30 is fixed to the middle of the front part of the bottom frame body 10. The middle part of the pushing oil cylinder 31 is installed on the oil cylinder connecting seat 30. The rear end of the push rod of the pushing oil cylinder 31 is movably connected to the front part of the lower moving seat 23 through a hinge shaft.

[0029] The pushing oil cylinder 31 is an oil cylinder equipped with an internal displacement sensor (or an external displacement sensor for the oil cylinder can also be installed on the oil cylinder). The displacement sensor is an internal displacement sensor for the oil cylinder, which is an existing known product that can be directly purchased on the existing market. It can sense the distance that the push rod of the pushing oil cylinder 31 is pushed out, so that it can be linked and coordinated with the positioning oil cylinder 28.

[0030] When this embodiment is in use, its bottom frame 10 can be installed on a hull or a moving mechanism. Its push oil cylinder 31 and positioning oil cylinder 28 are both connected to a hydraulic system through connecting pipes. It operates through the control valve of the hydraulic system to realize the corresponding actions of the push rods of the push oil cylinder 31 and the positioning oil cylinder 28. At the same time, the control valve, oil pump, etc. of its hydraulic system are all electrically connected to the control host through electrical connection lines. Similarly, the built-in displacement sensor is also electrically connected to the control host through an electrical connection line and is controlled by the control host to operate. The control host and the hydraulic system are both conventional structures and will not be elaborated here.

[0031] When this embodiment is in use, it is pushed by the push rods of the two push oil cylinders 31, so that the lower moving seat 23 moves backward along the top surface of the corresponding connecting support beam 27. When it moves to the required moving position, its position is sensed by the built-in displacement sensor, and its sensing signal is transmitted to the control host. The control host controls the corresponding control valve to operate, so that the push rods of the two positioning oil cylinders 28 push, so that the two positioning columns 281 are inserted into the corresponding connecting positioning pipes 25 (at this time, the end of the positioning column 281 faces the corresponding connecting positioning pipe 25, and only need to be pushed by the push rod of the positioning oil cylinder 28 to realize the insertion of the positioning column 281 into the corresponding connecting positioning pipe 25 to achieve fixation). Its fixed adjustment is convenient.

[0032] At this time, since the lower moving seat 23 moves backward, the lower parts of the two diagonal support arms 22 move backward, changing the inclination, so that the upper guide wheel 1 moves upward and backward. At this time, the vertically downward hammer head fixed at the front end of the rope wound on it moves backward, changing its front and rear positions, so as to meet the position where it needs to drill rock. Its adjustment is convenient, the operation is convenient, and the manual labor amount is greatly reduced.

[0033] Finally, it should be pointed out that the above embodiments are only relatively representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and there can be many variations. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention shall be considered to fall within the protection scope of the present invention.

Claims

1. An articulated boom adjusting and positioning mechanism, comprising a bottom frame body (10), characterized in that: On the top surfaces of the left and right parts of the front transverse beam of the bottom frame body (10), connecting seats are fixedly arranged. Two main support arms (21) extending upward are movably connected to the two connecting seats through a hinge shaft. The tops of the two main support arms (21) are fixedly connected to the same upper connecting seat. The rear part of the upper connecting seat is movably connected to two inclined support arms (22) through a hinge shaft. The bottoms of the two inclined support arms (22) are movably connected to two lower moving seats (23) through a hinge shaft. On the bottom surfaces of the left and right parts of the bottom plates of the two lower moving seats (23), side support frames (231) are fixedly arranged. Positioning through holes are formed on the side support frames (231). Through holes extending left and right are arranged in the middle parts of the two connecting support beams (27) extending front and back on the left and right parts of the bottom frame body (10). On the outer side wall of one of the side support frames (231) of each lower moving seat (23), a positioning oil cylinder (28) is installed. A positioning column (281) fixed to the end of the push rod of the positioning oil cylinder (28) is inserted into the corresponding positioning through hole and corresponds to the corresponding through hole.

2. The boom adjusting and positioning mechanism according to claim 1, characterized in that: Through holes that are aligned left and right are formed on the two outer side plates on the left and right and the two reinforcing plates inside in the middle part of the connecting support beam (27). The corresponding through holes that are aligned left and right form a through hole. A connecting positioning pipe (25) extending left and right is inserted into the through hole. The outer side wall of the connecting positioning pipe (25) is welded and fixed to the inner side wall of the through hole. Both the left and right ends of the connecting positioning pipe (25) extend out of the outer side plates on the left and right sides of the corresponding connecting support beam (27). The positioning through hole corresponds to the corresponding connecting positioning pipe (25). The bottom surface of the bottom plate of the lower moving seat (23) is pressed against the top surface of the corresponding connecting support beam (27). The two side support frames (231) are located on the left or right side of the connecting support beam (27). A positioning oil cylinder (28) is installed on the outer side wall of one of the side support frames (231). A positioning column (281) fixed to the end of the push rod of the positioning oil cylinder (28) corresponds to the middle through hole of the corresponding connecting positioning pipe (25).

3. The boom adjusting and positioning mechanism according to claim 1, wherein: A plurality of transverse connecting rods (26) are fixed between the two main support arms (21). The two ends of the transverse connecting rods (26) are fixed on the opposite wall surfaces of the two main support arms (21).

4. A boom adjusting and positioning mechanism according to claim 1, characterized in that: A guiding sleeve part (232) is fixed on the outer side wall of one of the side support frames (231). A positioning oil cylinder (28) is fixedly connected to the flange on the outer end surface of the guiding sleeve part (232) through bolts. A positioning column (281) is fixed to the end of the push rod of the positioning oil cylinder (28). The positioning column (281) is inserted into the corresponding guiding sleeve part (232). The end of the positioning column (281) is inserted into the corresponding positioning through hole. The outer side wall of the positioning column (281) is close to the inner side wall of the corresponding guiding sleeve part (232).

5. The boom adjustment and positioning mechanism according to claim 1, wherein: A polytetrafluoroethylene plate (2) is fixed to the bottom surface of the lower moving seat (23). The bottom surface of the polytetrafluoroethylene plate (2) is pressed against the top surface of the corresponding connecting support beam (27).

6. The boom adjusting and positioning mechanism according to claim 1, wherein: In the middle of the front part of the bottom frame body (10), an oil cylinder connecting seat (30) is fixedly installed. The middle part of the pushing oil cylinder (31) is installed on the oil cylinder connecting seat (30), and the rear end of the push rod of the pushing oil cylinder (31) is movably connected to the front part of the lower moving seat (23) through a hinge shaft.

7. The articulated boom adjusting and positioning mechanism according to claim 6, wherein: The pushing oil cylinder (31) is an oil cylinder equipped with an internal displacement sensor.

8. The boom adjusting and positioning mechanism according to claim 1, characterized in that: Two upper guide wheels (1) are movably connected to the upper connecting seat through a hinge shaft.

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