Ear hanging type supporting jack of cable tightening machine

Abstract

The utility model relates to bridge construction machinery. The cable tightening machine ear hanging type supporting jack comprises a cylinder body, a sealing sleeve fixed to the opening end of the cylinder body and an ejector head arranged in the cylinder body, the ejector head comprises a piston part matched with the cylinder body and a rod part arranged on the side, facing a main cable, of the piston part, and the rod part penetrates through the sealing sleeve and extends out of the cylinder body; an annular lug ring is formed on the outer edge of the end, facing the main cable, of the cylinder body in the circumferential direction of the cylinder body, and the lug ring can abut against the inner end of the steel sleeve on the fastening frame and can abut against the inner end of the steel sleeve and be fixedly connected with the steel sleeve. The hydraulic cylinder further comprises an oil passing and discharging hole which is used for being connected with a hydraulic system and can introduce or discharge hydraulic oil into or out of the cylinder body on the two sides of the piston part. A traditional outer side steel plate supporting mode is abandoned, the steel sleeve is adopted for supporting the front end of the supporting jack, and the overall supporting stress condition of the fastening frame is greatly improved.

Description

Technical Field

[0001] The utility model relates to a bridge construction machine, in particular to a cable tightening machine. Background Art

[0002] In recent years, with the continuous advancement of science and technology, the level of bridge construction has developed by leaps and bounds. There are more and more bridges across the Grand Canyon and the Yangtze River. Among the choices of large-span bridges, suspension bridges stand out with their super high cost performance and superior performance. During the construction of suspension bridges, the main cable is the lifeline of the suspension bridge. The weight of the suspension bridge deck is transferred to the main tower and foundation through the main cable. Therefore, the construction quality of the main cable is a crucial link in the entire construction of the suspension bridge.

[0003] A cable tightening machine is a device used to tighten the main cable of a suspension bridge. It usually moves on the main cable through a walking system, and tightens the main cable through a tightening frame that is looped around the main cable. The current tightening frame of a cable tightening machine is generally designed as a ring consisting of three sections. Two adjacent sections are connected by pins. By loosening the connection between two of the sections, an opening for cable entry can be formed. However, due to the heavy weight of the tightening frame, it is greatly affected by gravity during construction. In this form, affected by the catwalk, the cable entry process requires the cooperation of other auxiliary equipment such as force or lifting. After the cable is entered, auxiliary equipment is also required to insert the pin to form the overall structure construction, which undoubtedly increases the difficulty of construction.

[0004] Meanwhile, existing fastening frames, such as Figure 1 As shown in , the inner and outer steel plates A are integrally formed and then welded and fixed with stiffening plates, and a hole is opened in the inner steel plate B to place the jack. The main force-bearing support position is on the outer steel plate A of the support frame. On the one hand, under this structural form, the components of each section of the fastening frame are still large in volume and weight, and are not easy to process; specifically, the integrally formed inner and outer steel plates (A, B) have high processing and installation accuracy requirements, and the accuracy is not easy to control, and there are large processing errors, which makes it difficult to install other components; on the other hand, since the main force-bearing support position is on the outer steel plate A of the support frame, in order to ensure that the jack base is stressed, it is often necessary to set a steel pad D at the bottom of the jack (inside the outer steel plate), which undoubtedly increases the weight of the fastening frame again, and the stress condition is not effectively improved.

[0005] In addition, the existing tightening frame drives the tightening shoe (horseshoe) to tighten the main cable through the support jack, that is, the force is transmitted to the tightening shoe through the head end of the support jack, and then transmitted to the main cable by the tightening shoe, and the head (top) of the existing support jack is usually designed with a circular plane or a circular ring surface. When radial errors occur in processing or installation, since there is a certain deviation in the force direction of the support jack in the radial direction of the main cable, the cable tightening diameter will be adversely affected to a certain extent, the accuracy will be reduced, and the cable tightening effect will be poor.

[0006] Therefore, how to solve the above-mentioned problem of the cable tightening machine is a difficult problem in this field. Summary of the invention

[0007] The utility model aims to provide an ear-hanging support jack for a cable tightening machine, which can effectively improve the overall stress condition of a tightening frame.

[0008] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: an ear-hanging support jack for a cable tightening machine, comprising a cylinder body, a sleeve fixed to the open end of the cylinder body, and a head arranged in the cylinder body, the head comprising a piston part matched with the cylinder body, and a rod part arranged on the side of the piston part facing the main cable, the rod part passes through the sleeve and extends out of the cylinder body;

[0009] An annular ear ring is formed on the outer edge of one end of the cylinder body facing the main cable along the circumference of the cylinder body, and the ear ring can form a resistance with the inner end of the steel sleeve on the fastening frame, and can be placed on the inner end of the steel sleeve and fixedly connected with the steel sleeve; it also includes an oil discharge hole for connecting to the hydraulic system and capable of introducing or discharging hydraulic oil into the cylinder body on both sides of the piston part.

[0010] Preferably, the sleeve comprises a disc-shaped section adapted to the ear ring and a sealing embedded section embedded between the cylinder body and the mandrel rod portion.

[0011] Preferably, two oil drain holes are provided, one of which is located at one side of the bottom of the cylinder body, and the other oil drain hole extends in an L shape through the side wall of the disc-shaped section of the sleeve to the end of the sealing embedded section.

[0012] Preferably, the outer side wall of the embedded section of the sleeve is threadedly connected to the inner side wall of the cylinder body.

[0013] Preferably, a plurality of pairs of connection holes are correspondingly arranged on the disc-shaped section and the ear ring of the sleeve, and are connected by fastening bolts passing through the connection holes.

[0014] Preferably, the inner end surface of the steel sleeve and the ear ring are also correspondingly provided with connecting holes, and the fastening bolts are passed through the connecting holes on the disc-shaped section of the sleeve, the ear ring and the steel sleeve to fix the sleeve, the ear ring and the steel sleeve.

[0015] Preferably, 12 connection holes are provided, and the connection holes are evenly distributed in a ring shape.

[0016] The beneficial effects of the utility model are concentrated in:

[0017] Abandoning the traditional outer steel plate support form, a steel sleeve is used to realize the front end support of the support jack, which greatly improves the overall support force condition of the fastening frame; and has a positive impact on the overall weight reduction of the fastening frame. Specifically, during use, the support jack is changed from rear end support to front end ear hook support, and the ear ring on the support jack cylinder is connected to the steel sleeve. The ear ring can evenly disperse the force of the support jack to the entire steel sleeve, and then disperse it to the entire fastening frame through the steel sleeve; this structure can significantly improve the stress condition and avoid stress concentration. At the same time, with the improvement of the stress condition, the utility model no longer needs to set a steel pad, which has positive significance for the overall weight reduction of the fastening frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an existing three-segment fastening frame;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the cable tightening machine of the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the fastening frame of the utility model;

[0021] Figure 4 is a front view of the fastening frame;

[0022] Figure 5 It is a structural schematic diagram of an ear-hanging support jack;

[0023] Figure 6 for Figure 5 Left view of

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the ear-hanging support jack;

[0025] Figure 8 It is a schematic diagram of the installation of the fastening shoe and the head;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the fastening shoe. DETAILED DESCRIPTION

[0027] like Figure 2 and 3 The cable tightening machine and its fastening frame shown in the figure include a top frame and a fastening frame installed on the top frame. The top frame of the utility model adopts a square frame-shaped welded frame, which is rectangular as a whole and includes a cross beam 7, a longitudinal beam 9, a middle beam 11, etc. Each longitudinal beam 9, a cross beam 7 and a middle beam 11 of the top frame 5 is a double-jointed channel steel beam welded by two interlocking channel steels; the longitudinal beam 9 and the cross beam 7, and the longitudinal beam 9 and the middle beam 11 are welded to each other, thereby ensuring sufficient structural strength of the top frame.

[0028] The cross beams 7 at both ends of the top frame 5 are provided with roller brackets 8 for mounting rollers, which are generally nylon rollers 17. The roller brackets 8 and their nylon rollers 17 form a walking mechanism, and cooperate with the traction equipment to realize the walking of the whole machine on the main cable. The roller bracket 8 includes two seat rods 15 that pass through the middle of the cross beam 7 and are fixedly connected to the cross beam 7, and a seat body 16 disposed at the lower end of the seat rod 15, on which the nylon rollers 17 are disposed. The seat rod 15 can be fixed and installed and fixed by welding, bolt connection, etc. Since it is a load-bearing component of the whole machine, in order to realize convenient maintenance in the later stage, it can also be installed in a detachable connection while ensuring support.

[0029] A hydraulic system bracket 10 is provided between the longitudinal beams 9 in the middle of the top frame 5. As the name implies, the hydraulic system bracket 10 is used to install the hydraulic system; Figure 2 As shown in FIG. 1 , a hydraulic system support 10 in one embodiment is shown, which is in a square frame shape as a whole and is formed by welding a plurality of channel steels.

[0030] The middle section beam 11 is arranged between the longitudinal beams 9 on one side of the hydraulic system support 10, and a lifting ear support for connecting with the lifting ear mechanism 4 is provided at the bottom of the middle section beam 11, which is generally two pairs of connecting ear plates welded at the bottom of the middle section beam 11, and is used for pin connection with the lifting ear mechanism 4 of the fastening frame.

[0031] The biggest difference between the fastening frame used in the present invention and the existing fastening frame is that the fastening frame of the present invention adopts a two-stage type, while the prior art usually adopts a three-stage or more stage type. Figure 3 and 4 As shown in the figure, the fastening frame includes a ring-shaped fastening frame body 3 composed of two C-shaped segmented frames, an upper frame body 1 and a lower frame body 2; that is, the fastening frame body 3 includes an upper and a lower section, and the top of the upper frame body 1 is connected to the top frame 5 through a lifting ear mechanism 4. There are many specific implementation forms of the lifting ear mechanism 4, and one of them is used as an example here: Figure 4 As shown in the figure, the ear mechanism 4 includes a vertical ear plate 13 welded to the top of the upper frame 1, and both sides of the ear plate 13 are welded with reinforcing plates 14, which ensure the stability of the connection between the ear plate 13 and the upper frame 1.

[0032] The two ends of the upper frame 1 and the two ends of the lower frame 2 are hinged to each other through a pin 6, and the hinge position is located on the left and right sides of the fastening frame body 3, and the whole is horizontally distributed; by releasing the pin 6 located on one side of the fastening frame body 3, a downward cable entry opening can be formed on the fastening frame body 3. Since two C-shaped segmented frames are adopted, and the hinge positions of the two segmented frames are arranged horizontally, after the pin 6 hinged on one side is released, the segmented frame located at the bottom, that is, the lower frame 2, is automatically opened under the influence of gravity, forming a vertical downward cable entry opening, which is convenient for access to and detachment from the main cable. Compared with the existing three-stage or more stage fastening frames, the utility model only requires simple force assistance when entering and detaching the cable, which greatly reduces the difficulty of use.

[0033] At the same time, the utility model adopts the segmented frame, that is, the upper frame body 1 and the lower frame body 2 abandon the traditional Figure 1 The long component shown in the figure is replaced by a plurality of short components with small volume, pin weight and short length. This can greatly reduce the overall processing difficulty, thereby improving the processability and processing accuracy.

[0034] like Figure 3 and 4 As shown in the figure, the two segmented frames each include a plurality of steel sleeves 18 extending radially along the main cable. The number of steel sleeves 18 in the figure is 6. Of course, in actual situations, more or less can be provided according to specific circumstances, but 6 is generally a preferred implementation form. The segmented frame also includes a connecting section 19 arranged between two adjacent steel sleeves 18 and fixedly connected to the steel sleeves 18 at both ends, and an articulated section 20 arranged on one side of the steel sleeves 18 at both ends for connecting to other segmented frames, one end of the articulated section 20 being fixedly connected to the steel sleeves 18;

[0035] That is to say, the connecting section 19 of the utility model is used to connect two adjacent steel sleeves 18, and the hinge section 20 is used to realize the hinge connection of two segmented frames. A support jack 21 is installed in the steel sleeve 18, and the support jack 21 is adaptively configured according to the steel sleeve 18. A fastening shoe 23 for squeezing the main cable is arranged on the head 22 at the inner end of the support jack 21. A plurality of fastening shoes 23 can form an squeezing ring for the main cable.

[0036] In the traditional form, since the steel plates used in each segment frame are relatively long components and there are some arc bends in the segment frame, it is difficult to process and the precision is not easy to control. However, after the segment frame of the utility model adopts the segment structure of the segment frame itself, the length, volume and weight of each component can be greatly reduced, so that processing and assembly can be realized very conveniently.

[0037] Generally, the connection section 19 and the steel sleeve 18, and the hinge section 20 and the steel sleeve 18 are fixed by welding. Of course, various bridge connections, bolt connections, etc. can also be used for reinforcement, which will not be described here because it does not involve the core improvement of the present invention.

[0038] The connecting section 19 of the present invention can be formed by welding small components, such as Figure 3 and 4 As shown in the figure, the cross-section of the connecting section 19 is in the shape of a U-shape, and is surrounded by an inner connecting plate 24, an outer connecting plate 25, a front cover plate 26 and a rear cover plate 27; both ends of the inner connecting plate 24 and the outer connecting plate 25 are provided with arc-shaped openings adapted to the outer contour of the steel sleeve 18 to achieve seamless connection with the outer contour of the steel sleeve 18; a middle stiffening plate 28 is provided in the middle part of the connecting section 19, which is respectively welded to the inner connecting plate 24, the outer connecting plate 25, the front cover plate 26 and the rear cover plate 27.

[0039] Similarly, the hinge section 20 is also formed by welding small components together, such as Figure 3 and 4 As shown, the cross-section of the hinged section 20 is also in the shape of a U, and is surrounded by an inner joint plate 29, an outer joint plate 30, a front joint cover plate 31 and a rear joint cover plate 32; the ends of the inner joint plate 29 and the outer joint plate 30 corresponding to the steel sleeve 18 are also provided with arc-shaped openings adapted to the outer contour of the steel sleeve 18 to achieve seamless docking with the outer contour of the steel sleeve 18; the lengths of the front joint cover plate 31 and the rear joint cover plate 32 exceed those of the inner joint plate 29 and the outer joint plate 30, and the exceeding parts constitute hinged ears.

[0040] Regarding the steel sleeve 18 of the utility model, it includes a sleeve body 33 and a sleeve bottom plate 34 arranged at the outer end of the sleeve body 33 and used to close the sleeve body 33. The steel sleeve 18 is used to install a support jack. As the main force-bearing component, it is required to have a higher strength. At the same time, although the steel sleeve 18 of the utility model is used as a force-bearing component, its force-bearing mode is greatly different from the existing rear end force-bearing mode, that is, the outer side force-bearing mode. The specific form is detailed below. The sleeve bottom plate 14 of the utility model is connected to the sleeve body 33 by a plurality of sleeve bottom bolts 35 distributed around the outer end of the sleeve body 33. The function of the sleeve bottom plate 34 is mainly to achieve the closure of the sleeve body 33, and it can also play a certain force-bearing role.

[0041] The support jack 21 of the utility model will be described in detail below. It is specifically an ear-hanging support jack. Figure 5-7As shown in the figure, the support jack 21 includes a cylinder 36, a sleeve 37 fixed to the open end of the cylinder 36, and a head 22 arranged in the cylinder 36. The sleeve 37 and the cylinder 36 together form a space for the head 22 to move. The head 22 includes a piston part 38 matched with the cylinder 36, and a rod part 39 arranged on the side of the piston part 38 facing the main cable, and the rod part 39 extends to the outside of the cylinder 36 through the sleeve 37.

[0042] During use, the ear-hook support jack injects or discharges hydraulic oil into the active space on both sides of the piston part 38 of the jack head 22, thereby promoting the movement of the jack head 22. Therefore, the jack also includes an oil discharge hole 42 for connecting with the hydraulic system and enabling the hydraulic oil to be introduced into or discharged from the cylinder body 36 on both sides of the piston part 38. The specific arrangement of the oil discharge hole 42 can be seen in Figure 5 As shown in the figure, two oil drain holes 42 are provided, one of which is located at one side of the bottom of the cylinder body 36, and the other oil drain hole 42 extends in an L shape through the side wall of the disc section 43 of the sleeve 37 to the end of the sealing embedded section 44. As shown in the figure, the left oil drain hole 42 is fed with hydraulic oil, and the right oil drain hole 42 is discharged with hydraulic oil, so that the plug 22 can be retracted, and vice versa, the plug 22 can be extended.

[0043] On the basis of satisfying normal working activities, the biggest difference of this ear-hook support jack is that an annular ear ring 40 is formed along the circumference of the cylinder body 36 on the outer edge of one end of the cylinder body 36 facing the main cable, and the ear ring 40 can form a resistance with the inner end of the steel sleeve 18 on the fastening frame, and can be rested on the inner end of the steel sleeve 18 and fixedly connected with the steel sleeve 18; after adopting this form, the reaction force from the jack can be directly transmitted to the inner end of the entire steel sleeve 18 in a dispersed manner. At the same time, when the diameter and depth of the steel sleeve 18 match the length of the cylinder body 36, the sleeve bottom plate 34 mentioned above can also disperse the force to a certain extent. Thereby, the force of the jack can be more evenly dispersed to the entire steel sleeve 18, and then dispersed to the entire segmented frame through the steel sleeve, and finally the stress condition of the fastening frame is improved and enhanced. There is no need as Figure 1 As shown in the figure, a steel pad D is provided to play a dual role of improving performance and reducing weight.

[0044] The function of the sleeve 37 is to seal the cylinder 36 to form a closed hydraulic oil space. The sleeve 37 can be a simple disc-shaped cover, but a better approach is to Figure 5 As shown in the figure, the sleeve 37 includes a disc-shaped section 43 adapted to the ear ring 40 and a sealing embedded section 44 embedded between the cylinder body 36 and the rod 39 of the mandrel 22. While ensuring the sealing performance, the mandrel 22 can also be guided for secondary positioning by the extended sealing embedded section 44.

[0045] Regarding the specific connection form between the sleeve 37 and the cylinder body 36, it can be that the outer wall of the embedded section of the sleeve 37 is threadedly connected to the inner wall of the cylinder body 36 to form a threaded fixation. Alternatively, the disc-shaped section 43 of the sleeve 37 and the ear ring 40 are correspondingly provided with a plurality of pairs of connection holes 45, and are connected by fastening bolts penetrated in the connection holes 45. Alternatively, the combination of the two is also feasible, and the staff can flexibly choose according to actual needs.

[0046] Similarly, in the case of bolt connection, the inner end surface of the steel sleeve 18 and the ear ring 40 may also be provided with connection holes 45 correspondingly, and the fastening bolts are passed through the disc-shaped section 43 of the sleeve 37, the ear ring 40 and the connection holes 45 on the steel sleeve 18 to fix the sleeve 37, the ear ring 40 and the steel sleeve 18. This further ensures stable contact between the steel sleeve 18 and the ear ring 40. Figure 6 As shown in , there are 12 connecting holes 45 , and the connecting holes 45 are evenly distributed in a ring shape.

[0047] During operation, the utility model generates extrusion force by supporting the jack, and transmits it to the fastening shoe 23 by using the plug 22. Under the traditional structure, the force-bearing surface on the fastening shoe 23 and the force transmission surface at the end of the plug 22 are both planes, flat annular surfaces, etc. During the force transmission process, the force application direction completely relies on the movement direction of the plug 22 of the jack. When a radial error occurs, that is, the extrusion direction does not coincide with the radial direction of the main cable, it will cause mis-extrusion between the two fastening shoes 23, resulting in a reduction in the service life of the fastening shoe 23. At the same time, the force cannot be accurately transmitted to the main cable, affecting the tightening effect of the main cable.

[0048] For this reason, a very special feature of the utility model is that, Figure 7-9 As shown in , the fastening shoe 23 is provided with a force plane 47 for receiving the extrusion force transmitted from the plug 22, and the end face of the extrusion end of the plug 22 is in contact with the force plane 47 and is an arc surface. When there is a radial error, the arc surface can still have a large extrusion component force on the fastening shoe in the radial direction of the main cable, thereby achieving a correction effect on the radial error, avoiding excessive extrusion and force on the fastening shoe 23 in the wrong direction, and having a good effect in protecting the fastening shoe 23 and improving the cable tightening accuracy.

[0049] As for the position of the force plane on the fastening shoe 23, it is determined according to the actual installation of the fastening shoe 23 and the head 22, and it can be directly set on the back of the fastening shoe 23. Of course, it can also be as follows Figure 8 As shown in FIG. , the fastening shoe 23 includes a shoe body 48 and a connecting column 49 disposed on the back of the shoe body 48, and is connected to the head 22 through the connecting column 49. Fig. 9As shown in FIG. 4 , the end surface of the connecting column 49 is concave to form an end groove 50, and the groove bottom surface of the end groove 50 constitutes a force plane 47. The end arc surface of the plug 22 squeezes the groove bottom surface of the end groove 50 to form force transmission.

[0050] like Fig. 9 As shown in the figure, the connecting column 49 is used to connect with the top head 22, and its end surface located on the side of the end groove 50 constitutes a mounting surface 51, and a plurality of first mounting holes 52 are arranged on the mounting surface 51. A mounting plate 53 matching the mounting surface 51 on the connecting column 49 is arranged near the extrusion end of the top head 22; a plurality of second mounting holes 54 are arranged on the mounting plate 53 corresponding to the first mounting holes 52, and the connecting column 49 is connected to the mounting plate 53 by mounting bolts.

[0051] The mounting plate 53 on the plug 22 can be directly formed on the side wall near the end of the plug 22, or can be installed on the plug 22 in an independent form. The former is difficult to process and causes serious material consumption, so the latter is the main implementation form. When an independent mounting plate 53 is used, an annular groove 55 can be provided on the peripheral surface of the plug 22 near the extrusion end. The mounting plate 53 is composed of at least two petals, and the mounting plate 53 is embedded in the groove 55. Thereby, the mounting plate 53, the plug 22, and the connecting column 49 are effectively connected.

[0052] As for the specific number of the first mounting holes 52 and the second mounting holes 54, as shown in the figure, 6 pairs of the first mounting holes 52 and the second mounting holes 54 are evenly distributed in a ring shape around the axis of the top head 22. More pairs or fewer pairs may also be provided according to actual conditions.

[0053] The shoe body 48 of the shoe 23 only needs to form a matching extrusion ring to achieve the extrusion effect on the main cable. Fig. 9 As shown in the figure, the shoe body 48 is arc-shaped, and a male protrusion 56 is provided at the center of one end of the shoe body 48, and a female notch 57 matching with the male protrusion 56 is provided at the center of the other end; a plurality of shoe bodies 48 can form an extrusion ring matching with the diameter of the main cable.

Claims

1. A cable tensioning machine ear-hanging support jack, characterized in that: The utility model comprises a cylinder body (36), a sleeve (37) fixed at the open end of the cylinder body (36), and a head (22) arranged in the cylinder body (36), wherein the head (22) comprises a piston part (38) matched with the cylinder body (36), and a rod part (39) arranged on a side of the piston part (38) facing the main cable, and the rod part (39) passes through the sleeve (37) and extends to the outside of the cylinder body (36); An annular ear ring (40) is formed along the circumference of the cylinder body (36) at the outer edge of one end of the cylinder body (36) facing the main cable. The ear ring (40) can form a resistance with the inner end of the steel sleeve (18) on the fastening frame, and can be placed on the inner end of the steel sleeve (18) and fixedly connected with the steel sleeve (18); and also includes an oil discharge hole (42) for connecting to the hydraulic system and capable of introducing or discharging hydraulic oil into the cylinder body (36) on both sides of the piston part (38).

2. The cable tensioning machine ear-hanging support jack according to claim 1, characterized in that: The sleeve (37) comprises a disc-shaped section (43) adapted to the ear ring (40) and a sealing embedded section (44) embedded between the cylinder body (36) and the rod portion (39) of the mandrel (22).

3. The cable tensioning machine ear-hanging support jack according to claim 2, characterized in that: Two oil drain holes (42) are provided, one of which is located at one side of the bottom of the cylinder body (36), and the other oil drain hole (42) extends in an L shape through the side wall of the disc-shaped section (43) of the sleeve (37) to the end of the sealing embedded section (44).

4. The cable tensioning machine ear-hanging support jack according to claim 3, characterized in that: The outer wall of the embedded section of the sleeve (37) is threadedly connected to the inner wall of the cylinder body (36).

5. The cable tightening machine ear-hanging support jack according to claim 3, characterized in that: A plurality of pairs of connection holes (45) are correspondingly arranged on the disc-shaped section (43) and the ear ring (40) of the sleeve (37), and are connected by fastening bolts passing through the connection holes (45).

6. The cable tensioning machine ear-hanging support jack according to claim 5, characterized in that: The inner end surface of the steel sleeve (18) and the ear ring (40) are also provided with connection holes (45) correspondingly, and the fastening bolts are passed through the disc-shaped section (43) of the sleeve (37), the ear ring (40) and the connection holes (45) on the steel sleeve (18), so as to fix the sleeve (37), the ear ring (40) and the steel sleeve (18).

7. The cable tensioning machine ear-hanging support jack according to claim 6, characterized in that: Twelve connection holes (45) are provided, and the connection holes (45) are evenly distributed in a ring shape.

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