A branch saw and branch grabbing saw cutting mechanism

Abstract

The application relates to a branch saw and a branch grabbing saw cutting mechanism and belongs to the branch saw field. The branch saw cutting mechanism comprises a saw cutting knife with a rod structure, which comprises a knife shaft and knife teeth arranged on the circumferential surface of the knife shaft; branch saw sliding frames arranged at the two end sides of the saw cutting knife, the two ends of the knife shaft being rotationally connected with the branch saw sliding frames; a support frame connected with the branch saw sliding frame in a relatively sliding mode; a sliding frame hydraulic cylinder used for driving the support frame to relatively slide with the branch saw sliding frame, and the extension direction of the extension rod of the sliding frame hydraulic cylinder being perpendicular to the radial direction of the knife shaft; and a saw cutting knife driving motor connected with the branch saw sliding frame, the output end of the saw cutting knife driving motor being in transmission connection with one end of the knife shaft and used for driving the knife shaft to rotate around the axis. The application can effectively avoid the shaking phenomenon of the rod-shaped saw cutting knife during the high-altitude saw cutting of branches, the saw cutting effect is better, the branch saw can be applied to the saw cutting of relatively thick branches, and the product structure is compact and miniaturized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of branch sawing, and particularly relates to a branch saw and a branch grabbing and sawing mechanism which can be applied to high-altitude branch sawing. BACKGROUND

[0002] In urban construction work, the state stipulates that the urban greening coverage rate should be no less than 35%, and stipulates that the area of the main road green belt accounts for no less than 20% of the total land area of the road, and the area of the secondary road green land accounts for no less than 15% of the land area of the road. Green trees purify the air and block sunlight and heat, but also pose a safety hazard, such as branches growing to block street lamps, branches growing too close to power lines or houses, etc. To avoid the occurrence of the above dangers, it is necessary to prune the green trees. In the past, pruning work was carried out by pruning workers holding simple handheld tools under the tree or climbing the branches to prune. Manual pruning has the disadvantages of high labor intensity, low work efficiency, and high work danger.

[0003] Traditional branch saws are mostly chain saws or disc saws, such as the chain saw structure disclosed in the patent document with publication number CN106711847A. However, this chain saw structure is different from the conventional wood sawing from top to bottom, because the sawing action direction is mostly from bottom to top in the process of sawing high-altitude branches, so it is easy to cause the saw to be clamped during the process of sawing high-altitude branches, resulting in an uncomfortable sawing work.

[0004] To solve the above problems, the Chinese invention patent with publication number CN113330939A discloses a high-altitude branch saw, which is set as a rolling cutter structure composed of a cutter shaft and cutting teeth or scrapers / cutters arranged on the outer circumferential surface of the cutter shaft. The overall connection structure is very similar to the chain saw structure of the above-mentioned prior art, that is, one end of the saw body is connected with its support end (a crane arm or a handheld part), and the other end is a free end and is provided with a hydraulic motor. Unlike the above-mentioned prior art, the chain saw is replaced by a rod-type structure. However, the connection line direction of the support end and the hydraulic motor with the rod-type saw cutter shaft is the same in the actual use process. The feeding action needs to rely on the movement of the crane arm to drive the cutter shaft to move forward to achieve, or the hydraulic cylinder connected with the extension rod is used to drive the cutter shaft to rotate around the hinge point of the crane arm (at this time, the action trajectory of the cutter shaft is fan-shaped). However, practice shows that no matter which feeding mode is used, serious shaking phenomenon will occur during sawing branches, especially high-altitude branches, the stability of the saw blade connection is poor, and the sawing effect is poor. Moreover, the patent clearly discloses that the obstacle clearing action in the working process is to crush the branches between the cutter shaft and the fixed frame. In actual application, some small branches can be disposed of by crushing, but when dealing with some relatively thick branches, it is impossible to crush the thick branches, and the branch saw in the shaking state cannot saw the thick branches through the front end face. Therefore, this structure is not suitable for sawing thick branches.

[0005] In addition, the prior art such as the disc saw blade structure disclosed in the patent document with the publication number CN101563990A is improved on the basis of the ordinary disc saw blade to prevent clamping, the saw blade elasticity is improved through the web plate type connecting structure, the concave shape is formed by adopting the double-layer saw blades with different diameters, the saw blade has the functions of elasticity and anti-clamping in essence, and is suitable for cutting thicker branches with a diameter of 150-200mm, and the saw blade is also provided with a clamping forceps and other structures matched with the saw blade. Similarly, the utility model patent with the publication number CN204259479U discloses a branch pruning integrated operation vehicle, a mechanical hand claw and a disc saw are arranged on the working head of the branch pruning arm, branches are pruned from the tree, and the branches are prevented from falling when being sawn. However, in order to cut thicker branches, the disc saw structure needs to be large enough in size, which leads to a large overall size of the saw, the overall structure is not compact, and the miniaturization of the product is not conducive. SUMMARY

[0006] The tree branch saw and the tree branch grabbing and sawing mechanism provided by the present application can effectively avoid the shaking phenomenon of the rod-shaped sawing knife during the process of sawing branches in the air, the sawing effect is better, the sawing of thicker branches can be realized, the application range is wider, the product structure is more compact, and the miniaturization of the product is conducive to the movement of the product in the air in a complicated branch environment.

[0007] The technical scheme for solving the above technical problems is as follows:

[0008] In one aspect, the present application provides a tree branch saw, characterized in that the tree branch saw comprises

[0009] The sawing knife is in a rod shape and comprises a knife shaft and knife teeth arranged on the peripheral surface of the knife shaft.

[0010] The tree branch saw sliding frame is arranged at both ends of the sawing knife, and the two ends of the knife shaft are rotationally connected to the tree branch saw sliding frame.

[0011] The support frame is connected to the tree branch saw sliding frame in a relatively slidable manner.

[0012] The sliding frame hydraulic cylinder has a cylinder barrel fixed to the tree branch saw sliding frame and a telescopic rod fixedly connected to the support frame, and is used to drive the relative sliding of the support frame and the tree branch saw sliding frame; the telescopic direction of the telescopic rod is perpendicular to the radial direction of the knife shaft.

[0013] The sawing blade driving motor is connected with the branch saw sliding frame, and the output end of the sawing blade driving motor is in transmission connection with one end of the blade shaft for driving the blade shaft to rotate around the axis thereof.

[0014] Further, the sawing blade driving motor is arranged on the lower side of the sawing blade and is spaced apart from the sawing blade by a preset distance, and the output end of the sawing blade driving motor is in transmission connection with one end of the blade shaft through a transmission mechanism.

[0015] Further, the transmission mechanism is arranged in the branch saw sliding frame.

[0016] Further, the transmission mechanism comprises a driving wheel fixedly connected with the output end of the sawing blade driving motor and a driven wheel fixedly connected with one end of the blade shaft, the driving wheel and the driven wheel are in transmission connection with the branch saw sliding frame in a rotatable manner around the axis thereof, and the driving wheel and the driven wheel are in transmission connection through a transmission member.

[0017] Further, the driving wheel and the driven wheel adopt a gear structure, a belt wheel structure or a chain wheel structure, and correspondingly, the transmission member adopts a gear transmission structure, a belt transmission structure or a chain transmission structure.

[0018] Further, the other end of the blade shaft relative to the driven wheel is connected with the branch saw sliding frame through a bearing seat, and the bearing seat is detachably connected with the branch saw sliding frame.

[0019] Further, the cylinder barrels of the sliding frame hydraulic cylinders are arranged side by side on the sides of the branch saw sliding frame. Preferably, the cylinder barrels of the sliding frame hydraulic cylinders are arranged in an integrated structure with the branch saw sliding frame.

[0020] Further, a cross arm is further connected between the two branch saw sliding frames to ensure the synchronization of the movement of the two sliding frame hydraulic cylinders in driving the branch saw sliding frame; the cross arm is spaced apart from the sawing blade by a preset distance to provide a space for sawing branches.

[0021] Further, the support frame is fixedly connected with a guide plate, and the guide plate and the support frame form a sliding groove for the sliding of the branch saw sliding frame. Preferably, the guide plate has an L-shaped cross section.

[0022] Alternatively, a slide rail or a sliding groove corresponding to the support frame is arranged directly on the branch saw sliding frame.

[0023] Further, the blade teeth are detachably connected with the blade shaft.

[0024] In another aspect, the present application provides a branch grabbing and sawing mechanism, which is characterized by comprising a grabbing mechanism and a branch saw as described above, and the grabbing mechanism is arranged adjacent to the branch saw.

[0025] Further, the grabbing mechanism comprises a clamping jaw connected with the support frame and a clamping jaw drive for driving the clamping jaw to perform the grabbing action.

[0026] Further, the clamping jaw comprises a clamping jaw one and a clamping jaw two, the clamping jaw one and the clamping jaw two are oppositely arranged and respectively hinged on the support frame, and the clamping jaw drive is connected with the clamping jaw one and the clamping jaw two respectively for driving the opening and closing of the clamping jaw one and the clamping jaw two.

[0027] Further, the grabbing mechanism further comprises a clamping jaw connecting arm, the middle part of the clamping jaw one and the end part of the clamping jaw two are respectively hinged on the support frame, the end part of the clamping jaw one and the middle part of the clamping jaw two are respectively hinged on the two ends of the clamping jaw connecting arm, and the two ends of the clamping jaw drive are respectively hinged on the end part of the clamping jaw one and the support frame.

[0028] The beneficial effects of the present application are:

[0029] 1. The branch saw of the present application changes the connection architecture of the sawing knife and its support and driving parts by setting the connection relationship between the rod-shaped sawing knife and the branch saw sliding frame, the support frame, the sliding frame hydraulic cylinder and the sawing knife driving motor, so that both ends of the sawing knife are connection ends rather than free ends. The support frame is kept stationary during use, and the branch saw sliding frame connected with the support frame slides under the driving of the sliding frame hydraulic cylinder to perform a feeding action, so that the feeding direction is perpendicular to the axial direction of the sawing knife. This can effectively avoid the shaking phenomenon of the rod-shaped sawing knife caused by the movement or fan-shaped trajectory movement of the support arm during high-altitude sawing of branches, and the sawing effect of high-altitude branches is better. The branch saw can still achieve good sawing effect when processing thick branches, and has wider application range.

[0030] 2. The branch saw of the present application further sets the positional relationship between the rod-shaped sawing knife and the branch saw sliding frame, the support frame, the sliding frame hydraulic cylinder and the sawing knife driving motor, so that the overall structure is more compact, the product is more miniaturized, and the interference of the branches on the side is reduced, thereby facilitating the branch saw to travel in the gap of high-altitude branches to reach the sawing target position.

[0031] 3. The branch grabbing sawing mechanism of the present application sets the grabbing mechanism and the above-mentioned branch saw. In addition to the gain effect brought by the above-mentioned branch saw, the cooperation of the branch saw and the grabbing mechanism can more accurately fix the branch to be sawed, and grab the branch after sawing to avoid the free falling of the branch in the instant of sawing down. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the three-dimensional structure of the branch saw of an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the sectional structure of the branch saw of an embodiment of the present application;

[0034] Figure 3 This is another cross-sectional view of a branch saw according to an embodiment of the present invention;

[0035] Figure 4 This is a three-dimensional structural schematic diagram of a tree branch grasping and sawing mechanism according to an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the gripping mechanism according to an embodiment of the present invention;

[0037] In the diagram: 1. Saw blade, 11. Blade shaft, 110. Bearing seat, 12. Blade teeth, 2. Tree saw sliding frame, 3. Support frame, 4. Sliding frame hydraulic cylinder, 41. Cylinder, 42. Telescopic rod, 5. Saw blade drive motor, 61. Drive wheel, 62. Driven wheel, 63. Transmission component, 7. Cross arm, 8. Guide plate, 9. Slide groove, 201. Grip one, 202. Grip two, 203. Grip connecting arm, 204. Grip drive, 205. Hinge shaft one, 206. Hinge shaft two, 207. Hinge shaft three, 208. Hinge shaft four. Detailed Implementation

[0038] The principles and features of the present invention are described below. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0039] like Figures 1-3 As shown, one embodiment of the present invention provides a branch saw, which includes:

[0040] The saw blade 1 is a rod-shaped structure, which includes a blade shaft 11 and blade teeth 12 arranged on the circumferential surface of the blade shaft 11;

[0041] The branch saw sliding frame 2 is set on both ends of the saw blade 1. The two ends of the blade shaft 11 are rotatably connected to the branch saw sliding frame 2. Specifically, one end of the blade shaft 11 is connected to the top of one branch saw sliding frame 2 through the bearing seat 110, and the other end of the blade shaft 11 is rotatably connected to the upper part of another branch saw sliding frame 2.

[0042] Support frame 3 is connected to the sliding frame 2 of the branch saw in a relatively sliding manner; when in use, support frame 3 serves as a support for the branch saw and can be connected to other support mechanisms, such as support arms, etc.

[0043] The sliding frame hydraulic cylinder 4 has its cylinder 41 fixed to the branch saw sliding frame 2, and its telescopic rod 42 fixedly connected to the support frame 3. It is used to drive the support frame 3 and the branch saw sliding frame 2 to slide relative to each other, and the extension and retraction direction of the telescopic rod 42 is perpendicular to the radial direction of the cutter shaft 11. In order to ensure the stability of the drive, two sets of sliding frame hydraulic cylinders 4 can be set, which are respectively connected to the support frame 3 and the branch saw sliding frame 2.

[0044] The sawing knife driving motor 5, specifically a hydraulic motor, is connected with the branch saw sliding frame 2, and the output end of the sawing knife driving motor 5 is in transmission connection with one end of the knife shaft 11 through a transmission mechanism, for driving the knife shaft 11 to rotate around its axis.

[0045] In use, the support frame 3 is kept stationary, the sawing knife driving motor 5 is started to drive the sawing knife 1 to rotate, and the sliding frame hydraulic cylinder 4 is started to drive the telescopic rod 42 to extend out of or retract into the cylinder barrel 41.

[0046] In the present application, both ends of the sawing knife are connecting ends rather than free ends, and in use, the branch saw as a whole is kept stationary by the support frame 3, and the sliding frame hydraulic cylinder 4 inside the branch saw drives the two branch saw sliding frames to slide relative to the support frame 3, so that the feeding direction is perpendicular to the axial direction of the sawing knife, which can effectively avoid the shaking phenomenon of the rod-shaped sawing knife during high-altitude sawing of branches, thereby improving the sawing effect on high-altitude branches and enabling the branch saw to achieve good sawing effect when processing thick branches, and the application range is wider.

[0047] In a preferred embodiment of the present application, the sawing knife driving motor 5 is arranged on the lower side of the sawing knife 1 and is spaced apart from the sawing knife 1 by a predetermined distance, and the output end of the sawing knife driving motor 5 is in transmission connection with one end of the knife shaft 11 through a transmission mechanism.

[0048] In a preferred embodiment of the present application, the driving wheel 61 and the driven wheel 62 adopt a gear structure, and correspondingly, the transmission member 63 adopts a gear transmission structure. When the output shaft of the sawing blade driving motor 5 rotates, it drives the plurality of gears to mesh and drive the sawing blade 1 to rotate. At this time, the branch saw sliding frame 2 outside the transmission mechanism forms a gear box structure. Specifically, the driving gear and the driven gear are connected to the branch saw sliding frame 2 through bearings in a rotatable manner around the axis thereof. The driving gear is fixedly connected to the output end of the sawing blade driving motor 5 through a spline. The driving gear and the driven gear are connected through a plurality of gears that mesh with each other, as shown in FIG. 7, five gears are vertically connected in sequence through meshing. Each gear is connected to the branch saw sliding frame 2 through a bearing in a rotatable manner around the axis thereof. The advantage is that the transmission stability is good, and the plurality of meshing gears can keep a certain distance between the blade shaft 11 and the sawing blade driving motor 5, providing space for the sawing process of relatively thick branches. Figure 2

[0049] In a preferred embodiment of the present application, the transmission mechanism is hidden in the branch saw sliding frame 2. On the one hand, it is beneficial to the miniaturization of the product, and on the other hand, it can avoid the jamming caused by the falling of sundries into the transmission mechanism during the sawing process.

[0050] In other embodiments of the present application, the driving wheel 61 and the driven wheel 62 can also adopt a pulley structure (such as a synchronous pulley) or a chain wheel structure, and correspondingly, the transmission member 63 adopts a belt transmission structure (such as a synchronous belt) or a chain transmission structure (such as a chain).

[0051] In a preferred embodiment of the present application, the bearing seat 110 is detachably connected to the branch saw sliding frame 2, so as to facilitate the assembly and replacement of the blade shaft 11.

[0052] It is worth mentioning that the present application can be applied to the sawing of high-altitude branches, but is not limited to this.

[0053] In a preferred embodiment of the present application, the cylinder barrels 41 of the sliding frame hydraulic cylinders 4 are arranged side by side beside the branch saw sliding frame 2, so that the overall layout is more compact. More preferably, the cylinder barrels 41 of the sliding frame hydraulic cylinders 4 are arranged in an integrated structure with the branch saw sliding frame 2.

[0054] In a preferred embodiment of the present application, the two branch saw sliding frames 2 are also connected to the cross arm 7, which is beneficial to ensuring the synchronization of the two sliding frame hydraulic cylinders 4. A preset distance is left between the cross arm 7 and the sawing blade 1, which provides space for the sawing of branches, especially relatively thick branches.

[0055] ​In a preferred embodiment of the present application, the support frame 3 is fixedly connected with a guide plate 8, which is arranged outside the branch saw sliding frame 2 and the cylinder barrel 41 of the sliding frame hydraulic cylinder 4. The guide plate 8 has an L-shaped cross section, and a rectangular sliding groove 9 is formed between the guide plate 8 and the support frame 3 for the sliding of the branch saw sliding frame 2, so that the assembly of the branch saw sliding frame 2 is more compact, and the sliding operation of the branch saw sliding frame 2 is more stable. In addition, in other embodiments, a sliding rail can be directly arranged on the branch saw sliding frame 2, and the support frame 3 is provided with a sliding groove corresponding to the sliding rail; or a sliding groove is arranged on the side end surface of the branch saw sliding frame 2, and the support frame 3 is provided with a sliding rail corresponding to the sliding groove. Both of them can provide conditions for the relative sliding of the support frame 3 and the branch saw sliding frame 2.

[0056] As shown in Figure 4 and Figure 5 Another embodiment of the present application provides a branch grabbing saw cutting mechanism, which is based on the branch saw of the foregoing embodiment and further comprises a grabbing mechanism arranged adjacent to the branch saw.

[0057] In a preferred embodiment of the present application, the grabbing mechanism comprises a support frame 3, a clamping jaw one 201, a clamping jaw two 202, a clamping jaw connecting arm 203, and a clamping jaw drive 204. The clamping jaw one 201 and the clamping jaw two 202 are arranged opposite to each other, the middle part of the clamping jaw one 201 and the end part of the clamping jaw two 202 are respectively hinged to the support frame 3 through a hinge shaft one 205 and a hinge shaft four 208, the end part of the clamping jaw one 201 and the middle part of the clamping jaw two 202 are respectively hinged to the two ends of the clamping jaw connecting arm 203 through a hinge shaft two 206 and a hinge shaft three 207, and the two ends of the clamping jaw drive 204 are respectively hinged to the end part of the clamping jaw one 201 and the support frame 3. During operation, the opening and closing of the clamping jaw one 201 and the clamping jaw two 202 are controlled by the extension and retraction of the clamping jaw drive 204 to implement grabbing and releasing. The advantage is that the opening and closing angle is large, and various branches of different thicknesses can be grabbed.

[0058] Before use, the clamping jaw one 201 and the clamping jaw two 202 protrude outward from the sawing cutter 1. During use, the branch to be pruned is first clamped by the two clamping jaws by using the grabbing mechanism, and then the sawing cutter drive motor and the sliding frame hydraulic cylinder 4 are started to cut the branch by using the sawing cutter 1. After cutting, the grabbed branch is prevented from falling freely.

[0059] In this embodiment, the clamping jaw, the clamping jaw drive, etc. are respectively connected with the support frame 3, that is, share the same support frame 3 with the branch saw, and the overall structure is more compact.

Claims

1. A tree grabber sawing mechanism, characterized by, The branch saw comprises a sawing mechanism and a branch saw, the sawing mechanism is arranged adjacent to the branch saw The sawing mechanism comprises a saw blade (1) in a bar structure, a saw blade sliding frame (2), a support frame (3), a sliding frame hydraulic cylinder (4), and a saw blade driving motor (5). The saw blade (1) comprises a blade shaft (11) and blade teeth (12) arranged on the circumferential surface of the blade shaft (11). The blade shaft (11) is rotatably connected to the saw blade sliding frame (2) at both ends thereof. The support frame (3) is connected to the saw blade sliding frame (2) in a relative sliding manner. The sliding frame hydraulic cylinder (4) is connected to the saw blade sliding frame (2) at the cylinder barrel (41) thereof, and the telescopic rod (42) thereof is connected to the support frame (3), so as to drive the support frame (3) to slide relative to the saw blade sliding frame (2).

2. The tree branch grabbing sawing mechanism according to claim 1, characterized in that, The telescopic direction of the telescopic rod (42) is perpendicular to the blade shaft (11).

3. The tree branch grabbing sawing mechanism according to claim 2, characterized in that, The saw blade driving motor (5) is connected to the saw blade sliding frame (2), and the output end of the saw blade driving motor (5) is drivingly connected to one end of the blade shaft (11), so as to drive the blade shaft (11) to rotate about the axis thereof.

4. A tree grab sawing mechanism according to claim 2 or 3, wherein, The saw blade driving motor (5) is arranged on the lower side of the saw blade (1) and is spaced apart from the saw blade (1) by a preset distance. The output end of the saw blade driving motor (5) is drivingly connected to one end of the blade shaft (11) through a transmission mechanism.

5. The tree branch grabbing sawing mechanism of claim 1, wherein, The transmission mechanism is arranged in the saw blade sliding frame (2).

6. The tree branch grabbing sawing mechanism according to claim 1 or 2 or 3, characterized in that, The transmission mechanism comprises a driving wheel (61) fixedly connected to the output end of the saw blade driving motor (5) and a driven wheel (62) fixedly connected to one end of the blade shaft (11).

7. The tree branch grabbing sawing mechanism according to claim 1 or 2 or 3, characterized in that, The driving wheel (61) and the driven wheel (62) are rotatably connected to the saw blade sliding frame (2).

8. The tree branch grabbing sawing mechanism according to claim 1 or 2 or 3, characterized in that, The driving wheel (61) and the driven wheel (62) are in driving connection through a transmission member (63).

9. The tree branch grabbing sawing mechanism according to claim 1 or 2 or 3, characterized in that, The driving wheel (61) and the driven wheel (62) are in the form of gear wheels, belt wheels or chain wheels, and the transmission member (63) is in the form of gear transmission, belt transmission or chain transmission.

10. The tree branch grabbing sawing mechanism according to claim 1 or 2 or 3, characterized in that, The bearing seat (110) is detachably connected to the saw blade sliding frame (2).

11. The tree grabber sawing mechanism of claim 10, wherein, The cylinder barrels (41) of the sliding frame hydraulic cylinders (4) are arranged side by side on the side of the saw blade sliding frame (2). The support frame (3) is fixedly connected with a guide plate (8), and a sliding groove (9) for the sliding of the saw blade sliding frame (2) is formed between the support frame (3) and the guide plate (8). The saw blade sliding frame (2) is provided with a sliding rail or a sliding groove corresponding to the support frame (3). The blade teeth (12) are detachably connected to the blade shaft (11). The sawing mechanism comprises a clamping jaw connected to the support frame (3) and a clamping jaw driving (204) for driving the clamping jaw to perform a clamping action. The clamping jaw comprises a clamping jaw one (201) and a clamping jaw two (202), which are arranged opposite to each other and are respectively hinged to the support frame (3). The clamping jaw driving (204) is connected to the clamping jaw one (201) and the clamping jaw two (202) respectively, so as to drive the opening and closing of the clamping jaw one (201) and the clamping jaw two (202).

12. The tree grabber sawing mechanism of claim 11, wherein, The grabbing mechanism further comprises a clamping jaw connecting arm (203), the middle part of the first clamping jaw (201) and the end part of the second clamping jaw (202) are respectively hinged to the support frame (3), the end part of the first clamping jaw (201) and the middle part of the second clamping jaw (202) are respectively hinged to the two ends of the clamping jaw connecting arm (203), and the two ends of the clamping jaw driving (204) are respectively hinged to the end part of the first clamping jaw (201) and the support frame (3).

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