Temporary bumper post for rail transit

Abstract

The utility model provides a temporary car stop for rail transit. The temporary car stop comprises a supporting seat and an indication board installation assembly. The supporting base comprises a balancing weight, a fixing piece and a buffering piece, the fixing piece is detachably installed above the balancing weight, and the buffering piece is fixedly connected to the upper portion of the fixing piece. And the indication board mounting assembly is detachably mounted above the buffer piece. According to the temporary car stop, the shielding range can be enlarged, the collision probability is reduced, meanwhile, the lodging-resistant performance and stability of the temporary car stop can be improved, and assembling and disassembling are convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic indication equipment, in particular to a temporary vehicle stop for rail transportation. Background Art

[0002] Temporary vehicle stops play a vital role in rail transit maintenance or occasions where temporary track blockade construction is required. They are used to warn vehicles not to pass. When the track needs to be repaired or constructed, temporary vehicle stops can clearly inform the train driver or other vehicle operators of the status of the track ahead, thereby preventing vehicles from mistakenly entering the construction area, effectively preventing accidents such as train derailment and collision, and ensuring the safety of construction personnel and vehicles.

[0003] Existing temporary car stops are usually designed by tying two wooden sleepers and a stop sign to the rail with wire. Since they are only tied with wire, when affected by wind, external force or vibration when a train passes, the temporary car stop is easy to lose balance, topple or shift, and thus cannot effectively play the role of warning and prohibiting vehicles from passing, and has low reliability. Moreover, when the temporary car stop needs to be moved to other maintenance points, it usually needs to be manually disassembled and transported, which is not only inefficient, but also increases the labor intensity of the staff and the overall appearance is not beautiful. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a temporary vehicle stopper for rail transit, which can increase the shielding range, reduce the probability of being hit, and at the same time improve the anti-lodging performance and stability of the temporary vehicle stopper, and is easy to assemble and disassemble.

[0005] The utility model proposes a temporary vehicle stop for rail transit, comprising:

[0006] The support seat comprises a counterweight block, a fixing member and a buffer member, wherein the fixing member is detachably mounted above the counterweight block, and the buffer member is fixedly connected above the fixing member;

[0007] The signboard installation component is detachably installed above the buffer component.

[0008] In one embodiment, the temporary rail transit vehicle stop includes two groups of symmetrically arranged support seats, the two support seats are detachably connected, and the distance between the two support seats matches the distance between the tracks.

[0009] In one embodiment, sleeves are fixedly arranged inside the two buffers along their connection direction, and the sleeves penetrate through the two side surfaces of the buffers;

[0010] The two support seats are detachably connected via a connecting rod and a first bolt, the two ends of the connecting rod are respectively sleeved inside the sleeves of the two buffer members, and the first bolt passes through the tube wall of the sleeve to abut against the connecting rod.

[0011] In one embodiment, two sleeves are vertically arranged in parallel inside each buffer.

[0012] In one embodiment, the sign installation assembly is detachably installed at the middle part of the connecting rod, and includes a buckle rod seat, a second bolt, a mounting frame and a vertically arranged support rod;

[0013] The buckle rod seat is in an inverted U shape and is fixedly arranged at the lower end of the support rod and engaged with the outer wall of the connecting rod. The second bolt passes through the side of the buckle rod seat and presses against the connecting rod. The installation frame is fixedly arranged at the upper end of the support rod.

[0014] In one embodiment, the mounting frame includes a U-shaped plate, a cover plate and a rubber strip;

[0015] The U-shaped plate is fixedly connected to the upper end of the support rod, and a groove is provided in the middle;

[0016] The cover plate is movably arranged on the upper end of the U-shaped plate, and the rubber strip is fixedly arranged on the bottom surface of the cover plate;

[0017] The length of the rubber strip matches the width of the upper end of the U-shaped plate, and the length of the cover plate is greater than the length of the rubber strip;

[0018] The indicator plate is inserted into the groove of the U-shaped plate, the rubber strip abuts against the upper end of the indicator plate, and the cover plate closes the opening of the U-shaped plate.

[0019] In one embodiment, the cross section of the counterweight block is I-shaped, and the cross-sectional area in the middle is smaller than the cross-sectional areas at both ends;

[0020] The fixing piece is in an inverted U shape, a baffle is horizontally fixed to a side wall inside the fixing piece, the width of the fixing piece matches the width of the upper surface of the counterweight block, and the width of the baffle matches the width difference between the middle and upper end of the counterweight block.

[0021] In one embodiment, the counterweight block is detachably connected to the fixing member via a latch, and the latch is L-shaped and includes a pull rod and an insert block;

[0022] The plug block is trapezoidal in shape, the pull rod is arranged perpendicular to the plug block, and is fixedly connected to the end of the plug block with a larger cross-sectional area;

[0023] Wherein, the latch is inserted between the counterweight block and the fixing member and is located above the baffle. The opposite sides of the latch block respectively abut against the side wall of the counterweight block and the inner side wall of the fixing member, and the pull rod abuts against one end of the fixing member.

[0024] In one embodiment, the buffer member includes two triangular plates and a concave arc plate arranged perpendicular to the fixing member;

[0025] The two triangular plates are symmetrically arranged in the radial direction relative to the counterweight block, and the inclined surfaces are both arranged in a concave arc shape. The concave arc plate is arranged between the inclined surfaces of the two triangular plates.

[0026] In one embodiment, an extension piece is fixedly provided on one side of the fixing member, the extension piece is arranged parallel to the upper surface of the counterweight block, and one end of the extension piece is connected to the concave arc plate.

[0027] Compared with the prior art, the rail transit temporary car block of the utility model has the following beneficial effects:

[0028] 1) The rail transit temporary car stop of the utility model can connect the two ends of the connecting rod with the sleeves inside the two buffer parts through the sleeve and the first bolt and fix them through the first bolt, so that the distance between the two support seats can be limited; by sleeve-connecting the buckle rod seat on the connecting rod and fixing it with the second bolt, the sign installation assembly can be limited to a certain position on the connecting rod and cannot be moved, which is convenient for disassembly and assembly of the temporary car stop.

[0029] 2) In the rail transit temporary car stop of the utility model, the counterweight block is sleeved on the inner bottom of the inverted U-shaped fixing part, and the baffle is fixed in a position inside the fixing part and is located at the waist of the counterweight block. At this time, when the pin is inserted into the inside of the fixing part and is located above the baffle, the pin head of the pin abuts against one side of the waist of the counterweight block, filling the gap between the counterweight block and the fixing part from the side, thereby fixing the counterweight block and the fixing part. This fixing method is simple and quick to use, and is not easy to shift after being placed, making the temporary car stop more convenient to use and easy to disassemble, and can be transported and used relatively easily.

[0030] 3) Since the temporary rail transit car stop of the utility model has two sleeves inside the same buffer part, it is convenient to assemble the two connecting rods with the sleeves from different directions, so that multiple temporary car stops can be arranged in a row and connected together, which further increases the shielding range and improves the anti-lodging performance and stability of the temporary car stop.

[0031] 4) The temporary rail transit car stop of the utility model occupies a larger space after assembly, which is convenient for the vehicle owner to identify and reduces the chance of being hit. At the same time, the volume of each component after disassembly is small, which is convenient for handling and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of a temporary rail transit vehicle barrier viewed from above in one embodiment of the utility model;

[0033] Figure 2This is a schematic structural diagram of a temporary rail transit vehicle barrier from a side view according to an embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the installation structure of a support seat in a temporary vehicle stop for rail transit according to an embodiment of the utility model;

[0035] Figure 4 This is a structural schematic diagram of an indicator sign installation assembly in a temporary vehicle stop for rail transit according to an embodiment of the utility model;

[0036] Figure 5 The present invention is a schematic structural diagram of a latch in a temporary rail transit vehicle stop according to an embodiment of the present invention.

[0037] Reference numerals

[0038] 1. Fixing part, 2. Buffer part, 3. Sleeve, 4. Connecting rod, 5. First bolt, 6. Support rod, 7. Second bolt, 8. Signboard installation assembly, 9. Counterweight, 10. Block, 11. Latch, 101, Extension piece, 201, Concave arc plate, 801, U-shaped plate, 802, Groove, 803, Cover plate, 804, Rubber strip, 1101, Pull rod, 1102, Insert block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] Secondly, the term "one embodiment" or "embodiment" in this application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] The utility model proposes a temporary rail transit vehicle stopper, including a support seat and a signboard installation assembly 8, see Figure 1 , Figure 2 The support seat includes a counterweight 9, a fixing member 1 and a buffer 2. The fixing member 1 is detachably mounted on the top of the counterweight 9, and the buffer 2 is fixedly connected to the top of the fixing member 1. The sign installation assembly 8 is detachably mounted on the top of the buffer 2. The counterweight 9 is used to increase its own weight, improve the overall stability and safety of the temporary vehicle stop, and prevent the sign installation assembly 8 from being overturned or shifted due to wind, external force or vibration when a train passes. The buffer 2 is used to buffer the impact force of the train.

[0043] The following is a detailed description of the various components of the rail transit temporary car stop mentioned above.

[0044] A temporary rail transit vehicle stopper according to an embodiment of the utility model comprises two groups of symmetrically arranged support seats, the two support seats are detachably connected, and the distance between the two support seats matches the distance between the tracks.

[0045] In one embodiment of the utility model, sleeves 3 are fixedly provided inside the two buffer members 2 along the connection direction thereof, and the sleeves 3 pass through the two side surfaces of the buffer members 2. The two support seats are detachably connected by a connecting rod 4 and a first bolt 5. The two ends of the connecting rod 4 are respectively sleeved inside the sleeves 3 of the two buffer members 2, and the first bolt 5 passes through the tube wall of the sleeve 3 to resist the connecting rod 4, so that the distance between the two support seats is limited. The cross section of the connecting rod 4 in one embodiment of the utility model is square, and the square rod is not easy to rotate, and the connection is more stable. Correspondingly, the cross section of the corresponding sleeve 3 is also square. The design of two sets of support seats can further improve the stability of the temporary vehicle stop.

[0046] In one embodiment of the utility model, two sleeves 3 are arranged in parallel in the vertical direction inside each buffer member 2. This design allows the connecting rod 4 to be assembled with the sleeve 3 from different directions, thereby realizing the connection between multiple temporary vehicle stops during multi-track warning.

[0047] The sign installation assembly 8 of one embodiment of the utility model can be detachably installed in the middle part of the connecting rod 4, and includes a buckle rod seat, a second bolt 7, a mounting frame and a vertically arranged support rod 6. The buckle rod seat is in an inverted U shape, fixedly arranged at the lower end of the support rod 6, and engaged with the outer wall of the connecting rod 4. The second bolt 7 passes through the side of the buckle rod seat and abuts against the connecting rod 4, so that the sign installation assembly 8 is limited to a certain position on the connecting rod 4 and cannot move. This method is convenient to fix and relatively simple to disassemble. The mounting frame is fixedly arranged at the upper end of the support rod 6. The height of the sign can be increased by the support rod 6, thereby enhancing the observation effect.

[0048] The installation frame of an embodiment of the utility model includes a U-shaped plate 801, a cover plate 803 and a rubber strip 804. Figure 4The U-shaped plate 801 is fixedly connected to the upper end of the support rod 6, and a groove 802 is provided in the middle for inserting the sign. The cover plate 803 is movably arranged on the upper end of the U-shaped plate 801, and the rubber strip 804 is fixedly arranged on the bottom surface of the cover plate 803. The length of the rubber strip 804 matches the width of the upper end of the U-shaped plate 801, and the length of the cover plate 803 is greater than the length of the rubber strip 804.

[0049] The sign is inserted into the groove 802 of the U-shaped plate 801, the rubber strip 804 is pressed against the upper end of the sign, and the cover plate 803 closes the opening of the U-shaped plate 801. The cover plate 803 can be connected to the U-shaped plate 801 through one side such as a hinge, or it can be used as an independent part and buckled in the opening of the U-shaped plate 801 when in use. The rubber strip 804 is designed to better fit and fix the sign.

[0050] Of course, the installation frame can also be replaced by a display screen, etc., to display instruction information.

[0051] The cross section of the counterweight block 9 of one embodiment of the utility model is I-shaped, and the cross section area in the middle is smaller than the cross section area at both ends. The fixing member 1 is inverted U-shaped, and a baffle 10 is horizontally fixed on one side wall inside the fixing member 1. Figure 3 The width of the fixing member 1 matches the width of the upper surface of the counterweight 9, and the width of the baffle 10 matches the width difference between the middle and the upper end of the counterweight 9.

[0052] The counterweight block 9 of an embodiment of the utility model is detachably connected to the fixing member 1 through a latch 11. The latch 11 is L-shaped and includes a pull rod 1101 and an insert block 1102. Figure 5 The plug block 1102 is trapezoidal, and the pull rod 1101 is arranged perpendicular to the plug block 1102 and fixedly connected to the end of the plug block 1102 with a larger cross-sectional area. The latch 11 is inserted between the counterweight block 9 and the fixing member 1 and is located above the baffle 10. The opposite sides of the plug block 1102 are respectively against the side wall of the counterweight block 9 and the inner side wall of the fixing member 1, and the pull rod 1101 is against one end of the fixing member 1.

[0053] The pull rod 1101 is equivalent to the pin head of the latch, which facilitates the extraction and insertion of the latch 11. The plug block 1102 fills the gap between the counterweight block 9 and the fixing member 1 from the side. Through this bolt-type connection method, the counterweight block 9 and the fixing member 1 are fixed, which is simple and quick to install and easy to disassemble.

[0054] The buffer 2 of one embodiment of the utility model includes two triangular plates and a concave arc plate 201 which are arranged perpendicular to the fixing member 1. The two triangular plates are symmetrically arranged relative to the radial direction of the counterweight block 9, and the inclined surfaces are all arranged in a concave arc shape, and the concave arc plate 201 is arranged between the inclined surfaces of the two triangular plates. The triangular plates and the concave arc plate 201 with a concave arc design are used to buffer the impact force, so that part of the impact force is transferred upward when the train collides with the temporary car stop, reducing the forward impact force of the train, so as to achieve the purpose of braking the train. In this embodiment, the sleeve 3 inside the buffer 2 is arranged between the two triangular plates. The fixing method between the buffer 2 and the fixing member 1 can be welding or the like.

[0055] An extension piece 101 is fixedly arranged on one side of the fixing member 1 of one embodiment of the utility model. The extension piece 101 is arranged parallel to the upper surface of the counterweight 9, and one end is connected to the concave arc plate 201. The extension piece 101 is used to guide the train wheels along the upper side of the extension piece 101 to the concave arc plate 201 when the train collides with the temporary car stop, so as to achieve the purpose of train braking.

[0056] When in use, the installation steps of the temporary vehicle stopper of the utility model are as follows:

[0057] 1) Place the counterweights 9 on the sides of the rails where obstacles are to be set;

[0058] 2) Place the support seats on the counterweight blocks 9 respectively and fix them with the latches 11, wherein the extension piece 101 and the concave arc plate 201 face the direction of the train;

[0059] 3) Use connecting rod 4 to connect the two supporting seats;

[0060] 4) Install the mounting frame at the middle position of the connecting rod 4 through the second bolt 7;

[0061] 5) Insert the indicator plate into the groove 802 of the U-shaped plate 801, cover the cover plate 803, and the rubber strip presses against the indicator plate at the same time.

[0062] At this point, the temporary car block has been installed.

[0063] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "bottom", etc. are all based on the directions or positional relationships shown in the accompanying drawings. Such expressions are only for the purpose of making the description of the utility model simpler and more convenient, and do not indicate or imply that the referred parts must have a specific direction or be constructed and operated in a specific direction.

[0064] In addition, in this application, unless otherwise clearly specified and limited, "installation", "connection", "setting" and other similar terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Those skilled in the art can understand the specific meanings of the above terms in this application according to the specific circumstances. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0065] The construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present utility model, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0066] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0067] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0068] The utility model has the following beneficial effects:

[0069] 1) The rail transit temporary car stop of the utility model can connect the two ends of the connecting rod with the sleeves inside the two buffer parts through the sleeve and the first bolt and fix them through the first bolt, so that the distance between the two support seats can be limited; by sleeve-connecting the buckle rod seat on the connecting rod and fixing it with the second bolt, the sign installation assembly can be limited to a certain position on the connecting rod and cannot be moved, which is convenient for disassembly and assembly of the temporary car stop.

[0070] 2) In the rail transit temporary car stop of the utility model, the counterweight block is sleeved on the inner bottom of the inverted U-shaped fixing part, and the baffle is fixed in a position inside the fixing part and is located at the waist of the counterweight block. At this time, when the pin is inserted into the inside of the fixing part and is located above the baffle, the pin head of the pin abuts against one side of the waist of the counterweight block, filling the gap between the counterweight block and the fixing part from the side, thereby fixing the counterweight block and the fixing part. This fixing method is simple and quick to use, and is not easy to shift after being placed, making the temporary car stop more convenient to use and easy to disassemble, and can be transported and used relatively easily.

[0071] 3) Since the temporary rail transit car stop of the utility model has two sleeves inside the same buffer part, it is convenient to assemble the two connecting rods with the sleeves from different directions, so that multiple temporary car stops can be arranged in a row and connected together, which further increases the shielding range and improves the anti-lodging performance and stability of the temporary car stop.

[0072] 4) The temporary rail transit car stop of the utility model occupies a larger space after assembly, which is convenient for the vehicle owner to identify and reduces the chance of being hit. At the same time, the volume of each component after disassembly is small, which is convenient for handling and transportation.

[0073] The above-mentioned embodiments are only further explanations of the utility model, and are not intended to limit the utility model in other forms. The utility model may also have other various embodiments. Without departing from the spirit and essence of the utility model, those skilled in the art may make various corresponding modifications and changes according to the utility model, but these corresponding modifications and changes shall fall within the protection scope of the utility model.

Claims

1. A temporary vehicle stop for rail transit, characterized in that: include: The support seat comprises a counterweight block, a fixing member and a buffer member, wherein the fixing member is detachably mounted above the counterweight block, and the buffer member is fixedly connected above the fixing member; The signboard installation component is detachably installed above the buffer component.

2. The temporary rail transit vehicle stop according to claim 1, characterized in that: The temporary rail transit vehicle stop comprises two groups of symmetrically arranged support seats, the two support seats are detachably connected, and the distance between the two support seats matches the distance between the tracks.

3. The temporary vehicle stop for rail transit according to claim 2, characterized in that: A sleeve is fixedly arranged inside the two buffers along the connection direction thereof, and the sleeve passes through the two side surfaces of the buffers; The two support seats are detachably connected via a connecting rod and a first bolt, the two ends of the connecting rod are respectively sleeved inside the sleeves of the two buffer members, and the first bolt passes through the tube wall of the sleeve to abut against the connecting rod.

4. The temporary vehicle stop for rail transit according to claim 3, characterized in that: Two sleeves are arranged in parallel in the vertical direction inside each buffer.

5. The temporary vehicle stop for rail transit according to claim 3, characterized in that: The sign installation assembly is detachably installed at the middle part of the connecting rod, and comprises a buckle rod seat, a second bolt, a mounting frame and a vertically arranged support rod; The buckle rod seat is in an inverted U shape and is fixedly arranged at the lower end of the support rod and engaged with the outer wall of the connecting rod. The second bolt passes through the side of the buckle rod seat and presses against the connecting rod. The installation frame is fixedly arranged at the upper end of the support rod.

6. The temporary vehicle stop for rail transit according to claim 5, characterized in that: The installation frame includes a U-shaped plate, a cover plate and a rubber strip; The U-shaped plate is fixedly connected to the upper end of the support rod, and a groove is provided in the middle; The cover plate is movably arranged on the upper end of the U-shaped plate, and the rubber strip is fixedly arranged on the bottom surface of the cover plate; The length of the rubber strip matches the width of the upper end of the U-shaped plate, and the length of the cover plate is greater than the length of the rubber strip; The indicator plate is inserted into the groove of the U-shaped plate, the rubber strip abuts against the upper end of the indicator plate, and the cover plate closes the opening of the U-shaped plate.

7. The temporary vehicle stop for rail transit according to claim 1, characterized in that: The cross section of the counterweight block is I-shaped, and the cross section area in the middle is smaller than the cross section areas at both ends; The fixing piece is in an inverted U shape, a baffle is horizontally fixed to a side wall inside the fixing piece, the width of the fixing piece matches the width of the upper surface of the counterweight block, and the width of the baffle matches the width difference between the middle and upper end of the counterweight block.

8. The temporary vehicle stop for rail transit according to claim 7, characterized in that: The counterweight block is detachably connected to the fixing member via a latch, and the latch is L-shaped and includes a pull rod and an insert block; The plug block is trapezoidal in shape, the pull rod is arranged perpendicular to the plug block, and is fixedly connected to the end of the plug block with a larger cross-sectional area; Wherein, the latch is inserted between the counterweight block and the fixing member and is located above the baffle. The opposite sides of the latch block respectively abut against the side wall of the counterweight block and the inner side wall of the fixing member, and the pull rod abuts against one end of the fixing member.

9. The temporary vehicle stop for rail transit according to claim 1, characterized in that: The buffer member includes two triangular plates and a concave arc plate which are arranged perpendicular to the fixing member; The two triangular plates are symmetrically arranged in the radial direction relative to the counterweight block, and the inclined surfaces are both arranged in a concave arc shape. The concave arc plate is arranged between the inclined surfaces of the two triangular plates.

10. The temporary vehicle stop for rail transit according to claim 9, characterized in that: An extension piece is fixedly arranged on one side of the fixing member. The extension piece is arranged parallel to the upper surface of the counterweight block, and one end of the extension piece is connected to the concave arc plate.

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