Steel column deformation monitoring device

Abstract

The application belongs to the technical field of steel columns, and discloses a steel column deformation monitoring device, which comprises a steel column body and further comprises: a butt joint assembly clamped outside the steel column body. The butt joint plate is fixed on the steel column body by extruding the steel column body through the rotating threaded resistance rod, the butt joint plate and the steel column body remain vertical, the weight of the resistance stable rod and the counterweight block at both ends remains consistent, the vertical guide rod rotates around the ball shaft as the central axis under the action of the counterweight block, so that the vertical guide rod is in a vertical state, the resistance ring and the bottom of the ball shaft are pushed downward by the rotating threaded locking rod to resist, pressure is applied to the ball shaft through the resistance ring, so that the ball shaft and the bearing frame are fixed, thereby the vertical guide rod is fixed, and the deformation of the steel column body can be monitored by pushing the detection assembly along the vertical guide assembly, the accuracy of the steel column deformation monitoring is improved in the process, and the device can be applied to different environments.

Description

Technical Field

[0001] This invention belongs to the field of steel column technology, specifically a steel column deformation monitoring device. Background Technology

[0002] Steel columns are steel structural components used for vertical load-bearing in engineering projects such as buildings, bridges, and machinery. They are usually made of steel (such as H-beams, square steel tubes, and round steel tubes). Their main function is to transfer the upper load to the foundation, ensuring the stability and support strength of the structure.

[0003] Utility model patent CN220542062U discloses a building column deformation monitoring device, comprising: a base and an inclination monitoring mechanism mounted on the base, the base being installed on the ground; a clamping ring fitted onto the outside of the column, the clamping ring having a concave plate, the upper end of the inclination monitoring mechanism being connected to the concave plate, and a positioning device slidably mounted on the clamping ring, the end of the positioning device near the column being the monitoring end, the monitoring end abutting against the outer wall of the column. The inclination monitoring mechanism includes a guide rod, the guide rod having a first mounting groove, a top rod inserted into the first mounting groove, the top rod extending radially to form a limiting plate, a first compression spring sleeved on the end of the top rod near the bottom of the first mounting groove; a limiting element provided on the end of the guide rod away from the base, the limiting element having a limiting hole through which the top rod is adapted, the top rod passing through the limiting hole. This utility model has the advantages of simple structure, convenient installation, flexible use, and stable reliability. While the existing technologies can achieve the purpose of monitoring column deformation, when the column is in use, due to the complexity of the construction site, it is difficult to keep the concrete around the bottom connection of the steel column horizontal, which makes it impossible for the deformation monitoring device to remain vertical, and thus it is impossible to monitor the deformation of the steel column. Therefore, a steel column deformation monitoring device is proposed. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a steel column deformation monitoring device, which solves the problem that existing construction sites are complex and the concrete around the bottom connection of the steel column is difficult to keep horizontal, resulting in the deformation monitoring device being unable to maintain a vertical state.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel column deformation monitoring device, comprising a steel column body, and further comprising:

[0006] A docking assembly, which is clamped to the outside of the steel column body;

[0007] A vertical guide assembly is movably mounted on the docking assembly and fixed to the docking assembly by a locking assembly. The vertical guide assembly is made of aluminum alloy.

[0008] A detection component, which slides on the vertical guide component;

[0009] The docking assembly includes a receiving frame;

[0010] The vertical guide assembly includes a ball shaft movably sleeved in the middle of the receiving frame. The top and bottom of the ball shaft are fixedly fitted with a docking frame via a first connecting rod, and a vertical guide rod is fixedly fitted on the side of the docking frame.

[0011] A counterweight is fixed to the inner wall of the other side of the docking frame, and a bubble tube level is installed on the top of the counterweight.

[0012] The docking assembly is clamped onto the main body of the steel column. The vertical guide rod is rotated around the ball axis by the counterweight, so that the vertical guide rod is in a vertical state and is fixed by the locking assembly.

[0013] Preferably, the weight of the counterweight is consistent with the total weight of the vertical guide rod and the detection assembly;

[0014] In the initial state, the detection component is located in the middle of the vertical guide rod, and the vertical guide rod is in a vertical state under the action of the counterweight.

[0015] Preferably, the docking assembly includes a docking plate, both ends of which are fixedly fitted with C-shaped plates, and threaded abutment rods are threadedly sleeved on the C-shaped plates;

[0016] The C-shaped plate engages with the side of the steel column body, and the rotating threaded contact rod abuts against the steel column body, thus fixing the connecting plate to the steel column body;

[0017] A docking component is fixedly installed in the middle of the docking plate, and the docking component is fixedly connected to the receiving frame.

[0018] Preferably, the locking assembly includes a threaded locking rod threadedly connected to the receiving frame, and an abutment ring is movably mounted on the outside of the threaded locking rod;

[0019] Rotating the threaded locking rod pushes the contact ring downwards to make contact with the outside of the ball shaft.

[0020] Preferably, the vertical guide assembly further includes anti-stabilizing rods threaded onto both ends of the vertical guide rod;

[0021] When the vertical guide rod is in a vertical state, one end of the two anti-stabilizing rods is made to contact the outside of the steel column body by rotating the two anti-stabilizing rods.

[0022] Preferably, the detection assembly includes a docking slider that slides on the side of the vertical guide rod, a support frame is hinged to the docking slider, a second connecting rod is movably mounted on the support frame, a spring is sleeved on the outside of the second connecting rod to support the second connecting rod, and a ball bearing is provided at one end of the second connecting rod to contact the main body of the steel column.

[0023] Preferably, a marking pen is provided at the other end of the second connecting rod, a marking roller is movably sleeved inside the support frame, and a stabilizing rod is fixed on the support frame, the stabilizing rod being sleeved inside the marking roller;

[0024] The writing end of the marker pen contacts the outside of the marker roller.

[0025] Preferably, a threaded transmission rod is movably arranged inside the support frame, and a roller is fixedly installed at one end of the threaded transmission rod, with the roller contacting the side of the main body of the steel column;

[0026] The threaded drive rod is fitted with a connecting frame on its external thread, and the other end of the connecting frame is movably fitted with the marking roller.

[0027] Preferably, a drive wheel is movably sleeved on the outside of the threaded drive rod, and a sliding groove is provided on the outside of the threaded drive rod for the drive wheel to slide. The drive wheel drives the marking roller to rotate through a drive belt, and the drive wheel is movably connected to the connecting frame.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention uses a rotating threaded contact rod to press the steel column body, fixing the connecting plate to the steel column body. The connecting plate and the steel column body remain vertical. The weight of the contact stabilizing rod and the two ends of the counterweight are consistent. The initial state detection component is located in the middle of the vertical guide rod. Under the action of the counterweight, the vertical guide rod rotates around the ball shaft as its central axis, keeping the vertical guide rod in a vertical state. By rotating the threaded locking rod, the contact ring is pushed downward to contact the bottom of the ball shaft. The contact ring applies pressure to the ball shaft, fixing the ball shaft to the support frame, thereby fixing the vertical guide rod. The deformation of the steel column body can then be monitored by pushing the detection component vertically along the vertical guide component. In this process, the accuracy of steel column deformation monitoring is improved. This invention is adaptable to various environments. The support frame moves upwards, and the ball bearing, under the action of a spring, contacts the outside of the steel column body. Meanwhile, the writing end of the marker pen contacts the outside of the marking roller. The marking roller continuously rotates and extends, drawing spiral lines on its exterior with the marker pen. As the connecting slider slides from the bottom to the top of the vertical guide rod, the marking roller extends from the support frame. If the outside of the steel column body bends, it pushes the second connecting rod and the marker pen to move, causing the spacing of the spiral lines on the outside of the marking roller to increase or decrease. This indicates that the steel column body has bent or deformed. If the spacing of the spiral lines on the outside of the marking roller remains consistent, it indicates that the steel column body is not bent. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0031] Figure 2 This is a schematic diagram showing the disassembled structure of the vertical guide component and the docking component of the present invention;

[0032] Figure 3 This is a schematic diagram of the external structure of the docking component of the present invention;

[0033] Figure 4 This is a schematic diagram of the mating structure of the vertical guide component, docking component, and locking component of the present invention;

[0034] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0035] Figure 6 This is a top view of the structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the cooperation structure between the detection component and the main steel column of the present invention;

[0037] Figure 8This is a schematic diagram of the disassembled structure of the detection component of the present invention. In the diagram: 1. Steel column main body; 2. Vertical guide component; 21. Anti-stabilizing rod; 22. Vertical guide rod; 23. Counterweight; 24. Docking frame; 25. Ball shaft; 26. First connecting rod; 3. Docking component; 31. Docking plate; 32. C-shaped plate; 33. Threaded anti-contact rod; 34. Docking part; 35. Support frame; 4. Locking component; 41. Anti-contact ring; 42. Threaded locking rod; 6. Detection component; 61. Docking slider; 62. Support frame; 63. Marking roller; 64. Ball bearing; 65. Second connecting rod; 66. Marking pen; 67. Stabilizing rod; 611. Threaded transmission rod; 612. Slide groove; 613. Connecting frame; 614. Transmission wheel; 615. Roller; 616. Transmission belt. Detailed Implementation

[0038] 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.

[0039] like Figures 1 to 8 As shown, the present invention provides a steel column deformation monitoring device, including a steel column body 1, and further comprising:

[0040] The docking component 3 is clamped to the outside of the steel column body 1;

[0041] Vertical guide component 2 is movably mounted on docking component 3 and fixed to docking component 3 by locking component 4. Vertical guide component 2 is made of aluminum alloy.

[0042] Detection component 6 slides on vertical guide component 2;

[0043] Among them, the docking component 3 includes a receiving frame 35;

[0044] The vertical guide assembly 2 includes a ball shaft 25 movably sleeved in the middle of the receiving frame 35. The top and bottom of the ball shaft 25 are fixedly connected to a docking frame 24 via a first connecting rod 26. A vertical guide rod 22 is fixedly connected to the side of the docking frame 24.

[0045] A counterweight 23 is fixedly installed on the inner wall of the other side of the docking frame 24, and a bubble tube level is installed on the top of the counterweight 23.

[0046] The docking component 3 is clamped on the steel column body 1. The vertical guide rod 22 is rotated about the ball shaft 25 as the central axis by the counterweight block 23, so that the vertical guide rod 22 is in a vertical state and is fixed by the locking component 4.

[0047] The weight of the counterweight 23 is consistent with the total weight of the vertical guide rod 22 and the detection component 6;

[0048] The initial state detection component 6 is located in the middle of the vertical guide rod 22, and the vertical guide rod 22 is in a vertical state under the action of the counterweight 23;

[0049] The docking assembly 3 includes a docking plate 31, and C-shaped plates 32 are fixedly installed at both ends of the docking plate 31. Threaded abutment rods 33 are threadedly fitted on the C-shaped plates 32.

[0050] C-shaped plate 32 is engaged with the side of steel column body 1, and the threaded contact rod 33 is rotated to abut against steel column body 1, so that the connecting plate 31 is fixed on steel column body 1;

[0051] A docking component 34 is fixedly installed in the middle of the docking plate 31, and the docking component 34 is fixedly connected to the receiving frame 35.

[0052] The locking assembly 4 includes a threaded locking rod 42 threadedly connected to the support frame 35, and an abutment ring 41 is movably mounted on the outside of the threaded locking rod 42;

[0053] Rotating the threaded locking rod 42 pushes the contact ring 41 downward to make contact with the outside of the ball shaft 25.

[0054] The C-shaped plate 32 is engaged with the side of the steel column body 1. By rotating the threaded abutment rod 33, the steel column body 1 is pressed to fix the connecting plate 31 onto the steel column body 1. The connecting plate 31 and the steel column body 1 remain vertical. The weight of the abutment stabilizing rod 21 and the counterweight 23 at both ends is consistent. The initial state detection component 6 is located in the middle of the vertical guide rod 22. Under the action of the counterweight 23, the vertical guide rod 22 rotates around the ball shaft 25 as the central axis, so that the vertical guide rod 22 is in a vertical state. By rotating the threaded locking rod 42, the abutment ring 41 is pushed down to abut against the bottom of the ball shaft 25. The abutment ring 41 applies pressure to the ball shaft 25, so that the ball shaft 25 is fixed to the support frame 35, thereby fixing the vertical guide rod 22. The deformation of the steel column body 1 can be monitored by pushing the detection component 6 to move vertically along the vertical guide component 2. In this process, the accuracy of steel column deformation monitoring is improved, and it can be applied to different environments.

[0055] like Figure 2 and Figure 6 As shown, the vertical guide assembly 2 also includes abutment stabilizing rods 21 threadedly mounted to both ends of the vertical guide rod 22;

[0056] When the vertical guide rod 22 is in a vertical state, the two anti-stabilizing rods 21 are rotated so that one end of them is in contact with the outside of the steel column body 1.

[0057] The vertical guide rod 22 is fixed to the steel column body 1 by the docking component 3. The vertical guide rod 22 rotates around the ball shaft 25 as the central axis, so that the vertical guide rod 22 is in a vertical state and is fixed by the locking component 4. At this time, the rotating abutment stabilizing rod 21 makes one end of it abut against the outside of the steel column body 1. The stability of both ends of the vertical guide rod 22 is improved by the two abutment stabilizing rods 21, thereby ensuring the stability of the sliding of the detection component 6 and improving the accuracy of deformation monitoring of the steel column body 1.

[0058] like Figures 6-8 As shown, the detection component 6 includes a docking slider 61 that slides on the side of the vertical guide rod 22. A support frame 62 is hinged on the docking slider 61. A second connecting rod 65 is movably mounted on the support frame 62. A spring is sleeved on the outside of the second connecting rod 65 to support the second connecting rod 65. A ball bearing 64 is provided at one end of the second connecting rod 65 to contact the steel column body 1.

[0059] The other end of the second connecting rod 65 is provided with a marking pen 66, the inside of the support frame 62 is movably fitted with a marking roller 63, and a stabilizing rod 67 is fixedly mounted on the support frame 62, with the stabilizing rod 67 fitted inside the marking roller 63.

[0060] The writing tip of the marker pen 66 contacts the outside of the marker roller 63;

[0061] The support frame 62 has a threaded transmission rod 611 that is movably installed inside. One end of the threaded transmission rod 611 is fixedly fitted with a roller 615, which contacts the side of the steel column body 1.

[0062] The threaded drive rod 611 is threaded with a connecting bracket 613, and the other end of the connecting bracket 613 is movably fitted with the marking roller 63;

[0063] A drive wheel 614 is movably sleeved on the outside of the threaded drive rod 611. A groove 612 is provided on the outside of the threaded drive rod 611 for the drive wheel 614 to slide. The drive wheel 614 drives the marking roller 63 to rotate through the drive belt 616. The drive wheel 614 is movably connected to the connecting frame 613.

[0064] With the vertical guide rod 22 in a vertical position, the support frame 62 is rotated so that the roller 615 contacts the outside of the steel column body 1, while the ball 64 contacts the side of the steel column body 1 under the action of the spring, pushing the docking slider 61 and the support frame 62 to move upward. At this time, the roller 615 rolls along the side of the steel column body 1, driving the threaded transmission rod 611 to rotate. The other end of the connecting frame 613 is limited by the marking roller 63 and moves along the outside of the threaded transmission rod 611, while driving the marking roller 63 to move outward. Since the transmission wheel 614 is movably sleeved with the connecting frame 613 and slides in the groove 612, the transmission wheel 614 is driven to move synchronously with the connecting frame 613 and the marking roller 63, and drives the marking roller 63 to rotate through the transmission belt 616.

[0065] As the support frame 62 moves upward, the ball bearing 64 comes into contact with the outside of the steel column body 1 under the action of the spring, while the writing end of the marker pen 66 comes into contact with the outside of the marker roller 63. The marker roller 63 rotates and extends continuously, and the marker pen 66 draws a spiral line on the outside of the marker roller 63. As the docking slider 61 slides from the bottom to the top of the vertical guide rod 22, the marker roller 63 will extend out from inside the support frame 62.

[0066] If the exterior of the steel column body 1 is bent, it will push the second connecting rod 65 and the marking pen 66 to move, causing the spacing of the spiral lines on the outside of the marking roller 63 to increase or decrease. This indicates that the steel column body 1 has a bending deformation problem. If the spacing of the spiral lines on the outside of the marking roller 63 remains consistent, it indicates that the steel column body 1 is not bent.

[0067] Meanwhile, the support frame 62 may be equipped with a cleaning structure for the surface lines of the marking roller 63.

[0068] It is noted that the connection between the support frame 62 and the docking slider 61 can be adjusted by a screw, which is used to adjust the lateral and longitudinal distance of the support frame 62.

[0069] Working principle and usage process of this invention:

[0070] The C-shaped plate 32 is engaged with the side of the steel column body 1. By rotating the threaded abutment rod 33, the steel column body 1 is pressed together, fixing the mating plate 31 to the steel column body 1. The mating plate 31 and the steel column body 1 remain vertical. The weight of the abutment stabilizing rod 21 and the counterweight 23 at both ends are consistent. The initial state detection component 6 is located in the middle of the vertical guide rod 22. Under the action of the counterweight 23, the vertical guide rod 22 rotates around the ball shaft 25 as the central axis, keeping the vertical guide rod 22 in a vertical state. By rotating the threaded locking rod 42, the abutment ring 41 is pushed downward. The ball shaft 25 is in contact with the bottom of the ball shaft 25. Pressure is applied to the ball shaft 25 through the contact ring 41, so that the ball shaft 25 is fixed to the support frame 35, thereby fixing the vertical guide rod 22. At the same time, the contact stabilizing rod 21 is rotated so that one end of it contacts the outside of the steel column body 1. The stability of both ends of the vertical guide rod 22 is improved by the two contact stabilizing rods 21, thereby ensuring the stability of the sliding of the detection component 6 and improving the accuracy of deformation monitoring of the steel column body 1. The deformation of the steel column body 1 can be monitored by pushing the detection component 6 to move vertically along the vertical guide component 2.

[0071] With the vertical guide rod 22 in a vertical position, the support frame 62 is rotated so that the roller 615 contacts the outside of the steel column body 1, while the ball 64 contacts the side of the steel column body 1 under the action of the spring, pushing the docking slider 61 and the support frame 62 to move upward. At this time, the roller 615 rolls along the side of the steel column body 1, driving the threaded transmission rod 611 to rotate. The other end of the connecting frame 613 is limited by the marking roller 63 and moves along the outside of the threaded transmission rod 611, while driving the marking roller 63 to move outward. Since the transmission wheel 614 is movably sleeved with the connecting frame 613 and slides in the groove 612, the transmission wheel 614 is driven to move synchronously with the connecting frame 613 and the marking roller 63, and drives the marking roller 63 to rotate through the transmission belt 616.

[0072] As the support frame 62 moves upward, the ball bearing 64 comes into contact with the outside of the steel column body 1 under the action of the spring, while the writing end of the marker pen 66 comes into contact with the outside of the marker roller 63. The marker roller 63 rotates and extends continuously, and the marker pen 66 draws a spiral line on the outside of the marker roller 63. As the docking slider 61 slides from the bottom to the top of the vertical guide rod 22, the marker roller 63 will extend out from inside the support frame 62.

[0073] If the exterior of the steel column body 1 is bent, it will push the second connecting rod 65 and the marking pen 66 to move, causing the spacing of the spiral lines on the outside of the marking roller 63 to increase or decrease. This indicates that the steel column body 1 has a bending deformation problem. If the spacing of the spiral lines on the outside of the marking roller 63 remains consistent, it indicates that the steel column body 1 is not bent.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel column deformation monitoring device, comprising a steel column body (1), characterized in that, Also includes: The docking component (3) is clamped to the outside of the steel column body (1); A vertical guide component (2) is movably mounted on the docking component (3) and fixed to the docking component (3) by a locking component (4). The vertical guide component (2) is made of aluminum alloy. The detection component (6) slides on the vertical guide component (2); The docking component (3) includes a receiving frame (35). The vertical guide assembly (2) includes a ball shaft (25) movably sleeved in the middle of the receiving frame (35). The top and bottom of the ball shaft (25) are fixedly connected to a docking frame (24) via a first connecting rod (26). A vertical guide rod (22) is fixedly connected to the side of the docking frame (24). A counterweight (23) is fixedly mounted on the inner wall of the other side of the docking frame (24), and a bubble tube level is provided on the top of the counterweight (23). The docking assembly (3) is clamped on the steel column body (1). The vertical guide rod (22) is rotated around the ball shaft (25) by the counterweight (23) so that the vertical guide rod (22) is in a vertical state and is fixed by the locking assembly (4). The detection component (6) includes a docking slider (61) that slides on the side of the vertical guide rod (22). A support frame (62) is hinged on the docking slider (61). A second connecting rod (65) is movably mounted on the support frame (62). A spring is sleeved on the outside of the second connecting rod (65) to support the second connecting rod (65). One end of the second connecting rod (65) is provided with a ball bearing (64) that contacts the steel column body (1). The other end of the second connecting rod (65) is provided with a marking pen (66), and a marking roller (63) is movably sleeved inside the support frame (62). A stabilizing rod (67) is fixed on the support frame (62), and the stabilizing rod (67) is sleeved inside the marking roller (63). The writing end of the marker pen (66) contacts the outside of the marker roller (63).

2. The steel column deformation monitoring device according to claim 1, characterized in that: The weight of the counterweight (23) is consistent with the total weight of the vertical guide rod (22) and the detection component (6); In the initial state, the detection component (6) is located in the middle of the vertical guide rod (22), and the vertical guide rod (22) is in a vertical state under the action of the counterweight (23).

3. The steel column deformation monitoring device according to claim 1, characterized in that: The docking assembly (3) includes a docking plate (31), both ends of which are fixedly fitted with C-shaped plates (32), and threaded abutment rods (33) are threadedly fitted on the C-shaped plates (32). The C-shaped plate (32) is engaged with the side of the steel column body (1), and the rotating threaded contact rod (33) abuts against the steel column body (1), so that the connecting plate (31) is fixed on the steel column body (1); A docking component (34) is fixedly mounted in the middle of the docking plate (31), and the docking component (34) is fixedly connected to the receiving frame (35).

4. The steel column deformation monitoring device according to claim 1, characterized in that: The locking assembly (4) includes a threaded locking rod (42) threadedly connected to the support frame (35), and an abutment ring (41) is movably mounted on the outside of the threaded locking rod (42). Rotating the threaded locking rod (42) pushes the abutment ring (41) downward to abut the outside of the ball shaft (25).

5. The steel column deformation monitoring device according to claim 1, characterized in that: The vertical guide assembly (2) also includes abutment stabilizing rods (21) threaded to both ends of the vertical guide rod (22); When the vertical guide rod (22) is in a vertical state, it rotates the two abutting stabilizing rods (21) so that one end of it abuts against the outside of the steel column body (1).

6. The steel column deformation monitoring device according to claim 1, characterized in that: The support frame (62) is movably provided with a threaded transmission rod (611), and a roller (615) is fixedly installed at one end of the threaded transmission rod (611). The roller (615) contacts the side of the steel column body (1). The threaded drive rod (611) is threaded with a connecting frame (613), and the other end of the connecting frame (613) is movably fitted with the marking roller (63).

7. The steel column deformation monitoring device according to claim 6, characterized in that: The threaded drive rod (611) is movably fitted with a drive wheel (614), and the threaded drive rod (611) has a groove (612) on its outside for the drive wheel (614) to slide. The drive wheel (614) drives the marking roller (63) to rotate through the drive belt (616), and the drive wheel (614) is movably connected to the connecting frame (613).

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