Load detector for construction hoist

Abstract

The utility model discloses a load detector for a construction hoist, and relates to the technical field of load detection of construction hoists, the load detector comprises a shaft pin type force sensor, a cage assembly and a connecting piece, and a convex reinforcing pin is used for providing connection force between a transmission plate and a guide wheel vertical arm when the shaft pin type force sensor is broken. According to the utility model, the guide wheel vertical arm with the second through hole and the transmission plate with the vertical groove hole are arranged, and the convex reinforcing pin penetrates through the second through hole and the vertical groove hole, so that the monitoring data accuracy of the shaft pin type force sensor cannot be influenced in a daily state; and the convex reinforcing pin moves downwards to be in contact with the bottom of the inner wall of the vertical groove hole, and the cage assembly is connected with the connecting piece again, so that the operation safety of the construction hoist is further improved.

Description

Technical Field

[0001] This utility model relates to the field of load detection technology for construction hoists, specifically a load detector for construction hoists. Background Technology

[0002] Construction hoists are large pieces of equipment used on construction sites to vertically transport construction workers and building materials. To prevent construction hoists from overloading, load detectors are installed on them. Most existing construction hoist load detectors use pin-type force sensors. Pin-type sensors are specialized sensors that measure the radial load of components such as bearings and pulleys or the tension of wire ropes. They can replace pulley pins in the structure to measure radial force. When installed on a construction hoist, they replace the connecting pin between the hoist cage and the transmission plate, enabling the detection of the cage's load weight.

[0003] In actual use, construction hoists experience frequent load changes. Sudden increases or decreases in force can impact the pin-type force sensor, potentially causing it to break. Furthermore, relying solely on the pin-type force sensor to connect the hoist cage and transmission plate poses certain safety hazards. Therefore, to further improve the connection between the hoist cage and transmission plate, a load detector for construction hoists is provided. Utility Model Content

[0004] The purpose of this invention is to provide a load detector for construction hoists in order to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a load detector for a construction hoist, comprising a pin-type force sensor connected between a cage assembly and a connector. The cage assembly includes a cage body, a guide wheel vertical arm, and a connecting groove. The guide wheel vertical arm is symmetrically fixed to one side of the outer wall of the cage body. The connecting groove is opened at the top of the guide wheel vertical arm and extends through the side of the guide wheel vertical arm. A first through hole and a second through hole are opened on both sides of the inner wall of the connecting groove. The first through hole and the second through hole extend to both ends of the outer wall of the guide wheel vertical arm.

[0006] The connector includes a transmission plate, a lower connecting pin hole, a vertical slot hole, and an upper connecting pin hole. The lower connecting pin hole, the vertical slot hole, and the upper connecting pin hole are sequentially distributed from bottom to top at one end of the transmission plate and completely penetrate to the other end of the transmission plate.

[0007] The transmission plate is inserted into the inner side of the connecting groove, and the lower connecting pin hole and the vertical groove hole are aligned with the first through hole and the second through hole, respectively.

[0008] The pin-type force sensor passes through the first through hole and the lower connecting pin hole in sequence to realize the connection and limit of the transmission plate and the guide wheel vertical arm. The second through hole and the inner side of the vertical slot are inserted with a convex reinforcing pin. The convex reinforcing pin is used to provide a connection force between the transmission plate and the guide wheel vertical arm when the pin-type force sensor breaks.

[0009] As a further embodiment of this utility model: the outer side of one end of the shaft pin type force sensor and the convex reinforcing pin are respectively provided with a first locking groove and a second locking groove, and the first locking groove and the second locking groove are symmetrically distributed along the vertical direction;

[0010] The first and second slots are fitted with snap-fit ​​pieces inside. The snap-fit ​​pieces are attached to the end face of the guide wheel vertical arm and are fixedly connected to the guide wheel vertical arm by screws. The end face of the guide wheel vertical arm is provided with screw holes for screw tightening.

[0011] As a further improvement of this utility model: the inner diameter of the first through hole and the lower connecting pin hole matches the outer diameter of the shaft pin type force sensor, and the inner diameter of the second through hole matches the outer diameter of the pin shaft portion of the convex reinforcing pin.

[0012] As a further embodiment of this utility model: the lateral width of the vertical slot is matched with the outer diameter of the pin shaft portion of the convex reinforcing pin, and the vertical height of the vertical slot is greater than the outer diameter of the pin shaft portion of the convex reinforcing pin.

[0013] As a further improvement of this utility model: when the lower connecting pin hole is aligned with the first through hole, the upper and lower inner walls of the vertical slot hole do not contact the upper and lower surfaces of the outer wall of the convex reinforcing pin.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By setting a guide wheel vertical arm with a second through hole and a transmission plate with a vertical slot, and by using a convex reinforcing pin to pass through the second through hole and the vertical slot, the accuracy of the monitoring data of the pin-type force sensor will not be affected under normal conditions. When the pin-type force sensor breaks due to stress fatigue, the cage assembly will move downward relative to the connecting part. At this time, the convex reinforcing pin moves downward synchronously and contacts the bottom of the inner wall of the vertical slot, forming a connection between the cage assembly and the connecting part again, thereby preventing the cage assembly from separating from the connecting part. This allows the construction hoist to continue operating and smoothly lower the cage assembly to the ground, thereby further improving the operating safety of the construction hoist. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural breakdown diagram of the present invention;

[0018] Figure 3 This is a cross-sectional view of the structure of this utility model.

[0019] In the diagram: 1. Cage assembly; 101. Cage body; 102. Guide wheel vertical arm; 103. Connecting groove; 104. First through hole; 105. Second through hole; 106. Screw hole; 2. Connecting parts; 201. Transmission plate; 202. Lower connecting pin hole; 203. Vertical slot hole; 204. Upper connecting pin hole; 3. Shaft pin type force sensor; 4. First snap-fit ​​groove; 5. Convex reinforcing pin; 6. Second snap-fit ​​groove; 7. Snap-fit ​​piece. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-3 In this embodiment of the present invention, a load detector for a construction hoist includes a pin-type force sensor 3 connected between a cage assembly 1 and a connector 2. The cage assembly 1 includes a cage body 101, a guide wheel vertical arm 102, and a connecting groove 103. The guide wheel vertical arm 102 is symmetrically fixed to one side of the outer wall of the cage body 101. The connecting groove 103 is opened at the top of the guide wheel vertical arm 102 and passes through the side of the guide wheel vertical arm 102. A first through hole 104 and a second through hole 105 are opened on both sides of the inner wall of the connecting groove 103. The first through hole 104 and the second through hole 105 pass through to both ends of the outer wall of the guide wheel vertical arm 102.

[0022] The connector 2 includes a transmission plate 201, a lower connecting pin hole 202, a vertical slot hole 203, and an upper connecting pin hole 204. The lower connecting pin hole 202, the vertical slot hole 203, and the upper connecting pin hole 204 are sequentially distributed from bottom to top at one end of the transmission plate 201 and completely penetrate to the other end of the transmission plate 201.

[0023] The transmission plate 201 is inserted into the inner side of the connecting groove 103, and the lower connecting pin hole 202 and the vertical groove hole 203 are aligned with the first through hole 104 and the second through hole 105, respectively.

[0024] The pin-type force sensor 3 passes through the first through hole 104 and the lower connecting pin hole 202 to achieve connection and positioning between the transmission plate 201 and the guide wheel vertical arm 102. A convex reinforcing pin 5 is inserted into the inner side of the second through hole 105 and the vertical slot 203. The convex reinforcing pin 5 provides a connecting force between the transmission plate 201 and the guide wheel vertical arm 102 in the event of breakage of the pin-type force sensor 3. The inner diameter of the first through hole 104 and the lower connecting pin hole 202 matches the outer diameter of the pin-type force sensor 3, and the inner diameter of the second through hole 105 matches the outer diameter of the pin shaft portion of the convex reinforcing pin 5.

[0025] The lateral width of the vertical slot 203 matches the outer diameter of the pin shaft portion of the convex reinforcing pin 5, and the vertical height of the vertical slot 203 is greater than the outer diameter of the pin shaft portion of the convex reinforcing pin 5.

[0026] When the lower connecting pin hole 202 is aligned with the first through hole 104, the upper and lower inner walls of the vertical slot hole 203 do not contact the upper and lower surfaces of the outer wall of the convex reinforcing pin 5.

[0027] In this embodiment, it should be noted that the transmission plate 201 is connected to the drive unit of the cage body 101 through the upper connecting pin hole 204. The drive unit is used to provide lifting driving force to the cage body 101. This structure is a conventional structure of existing construction hoists and will not be described in detail here.

[0028] When the construction hoist is in use, the pin-type force sensor 3 can monitor the load inside the cage body 101. During this process, when the load on the cage body 101 causes deformation to the pin-type force sensor 3, the convex reinforcing pin 5 moves down synchronously with the cage assembly 1, and will not compress the inner wall of the vertical slot 203. That is, the convex reinforcing pin 5 is in a stress-free state, so it will not affect the accuracy of the monitoring data of the pin-type force sensor 3. (It should be noted that the pin-type force sensor 3 is a common pin-type force sensor on the market and has been widely used in construction hoists. The operating principle of the pin-type force sensor 3 will not be elaborated here.)

[0029] When the pin-type force sensor 3 breaks due to stress fatigue, the cage assembly 1 will move downward relative to the connector 2. At this time, the convex reinforcing pin 5 moves downward simultaneously and contacts the bottom of the inner wall of the vertical slot 203, forming a connection between the cage assembly 1 and the connector 2 again, thereby preventing the cage assembly 1 from separating from the connector 2. This allows the construction hoist to continue operating and smoothly lower the cage assembly 1 to the ground, thereby further improving the operational safety of the construction hoist.

[0030] Please refer to this carefully. Figures 1-3 The first locking groove 4 and the second locking groove 6 are respectively opened on the outer side of one end of the shaft pin type force sensor 3 and the convex reinforcing pin 5, and the first locking groove 4 and the second locking groove 6 are symmetrically distributed vertically.

[0031] The first slot 4 and the second slot 6 are fitted with a snap-fit ​​piece 7. The snap-fit ​​piece 7 is attached to the end face of the guide wheel vertical arm 102 and is fixedly connected to the guide wheel vertical arm 102 by screws. The end face of the guide wheel vertical arm 102 is provided with a screw hole 106 for screw tightening.

[0032] In this embodiment: by horizontally inserting the snap-fit ​​piece 7 into the inner side of the first snap-fit ​​groove 4 and the second snap-fit ​​groove 6, the shaft pin force sensor 3 and the convex reinforcing pin 5 can be locked synchronously. Then, by screwing the snap-fit ​​piece 7 through the screw and tightening it with the screw hole 106, the shaft pin force sensor 3 and the convex reinforcing pin 5 can be installed. The operation is simple and convenient.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A load detector for a construction hoist, comprising a pin-type force sensor (3) connected between a cage assembly (1) and a connector (2), characterized in that, The cage assembly (1) includes a cage body (101), a guide wheel vertical arm (102), and a connecting groove (103). The guide wheel vertical arm (102) is symmetrically fixed to one side of the outer wall of the cage body (101). The connecting groove (103) is opened at the top of the guide wheel vertical arm (102) and passes through the side of the guide wheel vertical arm (102). A first through hole (104) and a second through hole (105) are opened on both sides of the inner wall of the connecting groove (103). The first through hole (104) and the second through hole (105) pass through to both ends of the outer wall of the guide wheel vertical arm (102). The connector (2) includes a transmission plate (201), a lower connecting pin hole (202), a vertical slot hole (203), and an upper connecting pin hole (204). The lower connecting pin hole (202), the vertical slot hole (203), and the upper connecting pin hole (204) are sequentially distributed from bottom to top at one end of the transmission plate (201) and completely penetrate to the other end of the transmission plate (201). The transmission plate (201) is inserted into the inner side of the connecting groove (103) and the lower connecting pin hole (202) and the vertical groove hole (203) are aligned with the first through hole (104) and the second through hole (105) respectively; The pin-type force sensor (3) passes through the first through hole (104) and the lower connecting pin hole (202) in sequence to realize the connection limit between the transmission plate (201) and the guide wheel vertical arm (102). The second through hole (105) and the vertical slot hole (203) are fitted with convex reinforcing pins (5). The convex reinforcing pins (5) are used to provide a connection force between the transmission plate (201) and the guide wheel vertical arm (102) when the pin-type force sensor (3) breaks.

2. A load detector for a construction hoist according to claim 1, characterized in that, The first locking groove (4) and the second locking groove (6) are respectively opened on the outer side of one end of the shaft pin type force sensor (3) and the convex reinforcing pin (5), and the first locking groove (4) and the second locking groove (6) are symmetrically distributed in the vertical direction; The first slot (4) and the second slot (6) are fitted with a snap-fit ​​piece (7). The snap-fit ​​piece (7) is attached to the end face of the guide wheel vertical arm (102) and is fixedly connected to the guide wheel vertical arm (102) by screws. The end face of the guide wheel vertical arm (102) is provided with a screw hole (106) for screw tightening.

3. A load detector for a construction hoist according to claim 1, characterized in that, The inner diameters of the first through hole (104) and the lower connecting pin hole (202) are matched with the outer diameter of the shaft pin type force sensor (3), and the inner diameter of the second through hole (105) is matched with the outer diameter of the pin shaft portion of the convex reinforcing pin (5).

4. A load detector for a construction hoist according to claim 1, characterized in that, The lateral width of the vertical slot (203) matches the outer diameter of the pin shaft portion of the convex reinforcing pin (5), and the vertical height of the vertical slot (203) is greater than the outer diameter of the pin shaft portion of the convex reinforcing pin (5).

5. A load detector for a construction hoist according to claim 1, characterized in that, When the lower connecting pin hole (202) is aligned with the first through hole (104), the upper and lower inner walls of the vertical slot hole (203) do not contact the upper and lower surfaces of the outer wall of the convex reinforcing pin (5).

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