Automatic bending center pressing rod mechanism

Abstract

The utility model relates to the technical field of bending pressing rods, and particularly discloses an automatic bending center pressing rod mechanism which comprises an upper connecting rod, a floating assembly, a lower connecting rod and a guide assembly. The upper connecting rod is located over the lower connecting rod, the floating assembly is located between the upper connecting rod and the lower connecting rod and comprises an upper joint seat and an upper connecting piece, a connecting plate is arranged at the bottom of the upper connecting rod, the upper joint seat is located at the top of the lower connecting rod, and the upper joint seat is connected with the connecting plate through the upper connecting piece. An arc-shaped protruding block is arranged at the top of the upper joint base, an arc-shaped groove is formed in the face, facing the upper joint base, of the connecting plate, the arc-shaped protruding block is matched with the arc-shaped groove, and the upper connecting piece is sleeved with a first elastic piece. And the guide assembly is arranged at the bottom of the lower connecting rod, so that the stress balance of the pressing rod is effectively guaranteed, the effect of pressing the bent plate is achieved, and the situation that the pressing rod is bent and blocked due to radial force can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of bending pressure rods, in particular to an automatic bending central pressure rod mechanism. Background Art

[0002] The bending center is a machine that can bend thin plates. It can perform automated multilateral bending processing on thin plate workpieces during operation. The bending center has the characteristics of high efficiency and automatic positioning, which ensures high precision and saves labor costs. The overall structure of the bending center includes a CNC system, a servo forward and backward moving mechanism, a servo upper moving mechanism, a lower mold fixing mechanism, and an upper press mold machine. The upper press mold mechanism can customize the corresponding upper press mold according to different bending requirements.

[0003] When the existing bending center bends the plate, it needs to press the plate through the pressure rod and drive the upper connecting rod through the moving mechanism. The existing pressure rod mainly adopts the structure of the whole rod. When the pressure rod is subjected to radial load, the pressure rod will be deformed. In addition, the pressure rod of the existing bending center does not have an automatic leveling function. During use, it is necessary to maintain force balance to ensure that the pressure surface of the tightened plate is fully contacted, so that the pressure surface of the plate is stably stressed, and ensure that the plate can be pressed during the bending process to prevent the plate from loosening and affecting the bending effect of the plate.

[0004] With reference to the patent publication number "CN217512601U", the patent name "A bending machine pressure rod", the technical scheme discloses "a bending machine pressure rod, the pressure rod is arranged as a split structure, including a rotating shaft and a connecting rod; the connecting rod is provided with an inner groove, and an elastic buffer is installed in the inner groove, and the lower end of the rotating shaft is correspondingly extended into the inner groove and connected with the elastic buffer, and the rotating shaft and the connecting rod are connected and installed as a whole through the elastic buffer. In this device, the one-piece pressure rod in the prior art is arranged as a split structure, mainly including a rotating shaft and a connecting rod, and the two rod bodies are connected as a whole through an elastic buffer, and the rigid rod body is improved into an elastic connecting rod body, so that even if the pressure head below is stuck, the rotating shaft and the connecting rod are separated under the action of the spring buffer, and the pressure rod will not be damaged, and there is enough time for shutdown processing, and the structure is reasonable". Although this technical scheme can effectively prevent the connecting rod from being damaged when the pressure head of the pressure rod is stuck, this technical scheme cannot achieve the force balance of the rod body, and fails to solve the problem of bending of the rod body due to radial force.

[0005] Therefore, how to achieve balanced force on the compression rod is the main technical problem that technicians need to solve. Utility Model Content

[0006] The utility model aims to provide an automatic bending center pressure rod mechanism to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] An automatic bending center pressure rod mechanism, comprising:

[0009] An upper connecting rod, a floating assembly, a lower connecting rod and a guide assembly;

[0010] The upper connecting rod is located directly above the lower connecting rod, the floating assembly is located between the upper connecting rod and the lower connecting rod, the floating assembly includes an upper joint seat and an upper connecting member, a connecting plate is provided at the bottom of the upper connecting rod, the upper joint seat is located at the top of the lower connecting rod, and the upper joint seat is connected to the connecting plate through the upper connecting member, an arc-shaped protrusion is provided at the top of the upper joint seat, an arc-shaped groove is provided on a side of the connecting plate facing the upper joint seat, the arc-shaped protrusion is adapted to the arc-shaped groove, and a first elastic member is sleeved on the outside of the upper connecting member;

[0011] The guide assembly is arranged at the bottom of the lower connecting rod, and the guide assembly includes a lower joint seat and a lower connecting piece. A pressure plate is arranged directly below the lower joint seat, and the lower joint seat is connected to the pressure plate through the lower connecting piece. A joint bearing is arranged between the lower joint seat and the pressure plate, and a second elastic piece is sleeved on the outside of the lower connecting piece.

[0012] Preferably, a plurality of connecting through holes are opened around the connecting plate, and a plurality of mounting through holes are arranged on the outside of the upper joint seat, and the plurality of mounting through holes correspond one-to-one with the plurality of connecting through holes, and one end of the upper connecting member passes through the mounting through hole and the connecting through hole in sequence, and a first locking member is provided at one end of the upper connecting member.

[0013] Preferably, one end of the first elastic member abuts against the bottom of the upper joint seat.

[0014] Preferably, the arc-shaped groove is located at the center of the upper joint seat.

[0015] Preferably, two limiting washers are sleeved on the outside of the lower connecting member, the two limiting washers are respectively located at two ends of the second elastic member, and one of the limiting washers is in contact with the top of the lower joint seat.

[0016] Preferably, a mounting circular groove is provided at the bottom center of the lower joint seat, a limiting clamping column is provided at the center of the mounting circular groove, the joint bearing is located inside the mounting circular groove, and the limiting clamping column is clamped with the joint bearing.

[0017] Preferably, fixing through holes are provided on both sides of the lower joint seat, a countersunk hole is provided at the bottom of the pressure plate, one end of the lower connecting piece passes through the countersunk hole to the fixing through hole, and one end of the lower connecting piece is sleeved with a second locking piece.

[0018] Preferably, the central axis of the upper connecting rod and the central axis of the lower connecting rod are both located on the same central axis.

[0019] Preferably, one side of the joint bearing faces the lower joint seat, and the other side of the joint bearing faces the pressure plate.

[0020] Compared with the prior art, the technical scheme provides an automatic bending center pressure rod mechanism: a floating assembly is arranged between the upper connecting rod and the lower connecting rod, the floating assembly includes an upper joint seat and an upper connecting piece, a connecting plate is arranged at the bottom of the upper connecting rod, the upper joint seat is located on the top of the lower connecting rod, the upper joint seat is connected to the connecting plate through the upper connecting piece, an arc-shaped protrusion is arranged on the top of the upper joint seat, and an arc-shaped groove is arranged on the side of the connecting plate facing the upper joint seat, the arc-shaped protrusion is adapted to the arc-shaped groove, a first elastic piece is sleeved on the outside of the upper connecting piece, when the lower connecting rod receives radial force, the arc-shaped protrusion can swing at any angle inside the arc-shaped groove, and when the external force disappears, the arc-shaped protrusion can swing at any angle inside the arc-shaped groove, and when the external force disappears, the first elastic piece can be used to adjust the arc-shaped protrusion. The elastic force of the component restores the swing angle to the original stress-free state, so that the upper connecting rod and the lower connecting rod will not be deformed or bent due to the radial force; a guide assembly is provided at the bottom of the lower connecting rod, the guide assembly includes a joint bearing and a lower connecting member, the joint bearing is provided between the lower connecting rod and the pressure plate, the lower connecting rod and the pressure plate are connected by the lower connecting member, and a second elastic member is provided at the end of the lower connecting member, so that the guide assembly can ensure that the force on the pressure plate under the pressure rod is uniform, the lower connecting member can be adjusted to control the installation level of the pressure plate, and when the pressure plate is pressed down to contact the plate, the pressure plate can be automatically guided by compression of the second elastic member, so that the pressure plate can press the plate flatly and effectively achieve the effect of balancing the force on the bending pressure rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a schematic diagram of the overall side structure of the utility model.

[0023] Figure 2 It is a schematic diagram of the overall explosion structure in the utility model.

[0024] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0025] As shown in the drawings: 1. upper connecting rod; 2. floating assembly; 3. lower connecting rod; 4. guide assembly; 5. pressure plate; 6. joint bearing; 11. connecting plate; 21. upper joint seat; 22. upper connecting piece; 41. lower joint seat; 42. lower connecting piece; 51. countersunk hole; 99. first elastic piece; 100. second elastic piece; 101. mounting groove; 102. limiting clamping column; 111. arc-shaped groove; 112. connecting through hole; 211. arc-shaped protrusion; 212. mounting through hole; 221. first locking piece; 411. fixing through hole; 421. second locking piece; 422. limiting washer. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. All other embodiments obtained by ordinary personnel in this field without making creative work belong to the protection scope of the utility model. The preferred implementation of the utility model will be described in more detail below with reference to the drawings. Although the preferred implementation of the utility model is shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the implementation described here. On the contrary, these implementations are provided to make the utility model more thorough and complete, and to fully convey the scope of the utility model to those skilled in the art.

[0027] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] In the description of the present invention, it should be understood that the terms "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various components in the present invention, this information should not be limited to these terms. These terms are only used to distinguish components of the same type from each other. For example, without departing from the scope of the present invention, the first component may also be referred to as the second component, and similarly, the second component may also be referred to as the first component. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0032] The technical solution of the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

[0033] refer to Figures 1 to 3 , an automatic bending center pressure rod mechanism, comprising:

[0034] An upper connecting rod 1, a floating assembly 2, a lower connecting rod 3 and a guide assembly 4;

[0035] The upper connecting rod 1 is located directly above the lower connecting rod 3, the floating assembly 2 is located between the upper connecting rod 1 and the lower connecting rod 3, the floating assembly 2 includes an upper joint seat 21 and an upper connecting member 22, a connecting plate 11 is provided at the bottom of the upper connecting rod 1, the upper joint seat 21 is located at the top of the lower connecting rod 3, and the upper joint seat 21 is connected to the connecting plate 11 through the upper connecting member 22, an arc-shaped protrusion 211 is provided at the top of the upper joint seat 21, an arc-shaped groove 111 is provided on the side of the connecting plate 11 facing the upper joint seat 21, the arc-shaped protrusion 211 is adapted to the arc-shaped groove 111, and a first elastic member 99 is sleeved on the outside of the upper connecting member 22;

[0036] The guide assembly 4 is arranged at the bottom of the lower connecting rod 3, and the guide assembly 4 includes a lower joint seat 41 and a lower connecting member 42. A pressure plate 5 is arranged directly below the lower joint seat 41. The lower joint seat 41 is connected to the pressure plate 5 through the lower connecting member 42. A joint bearing 6 is arranged between the lower joint seat 41 and the pressure plate 5. The outside of the lower connecting member 42 is sleeved with a second elastic member 100.

[0037] Specifically, a plurality of connecting through holes 112 are provided around the connecting plate 11, and a plurality of mounting through holes 212 are provided on the outside of the upper joint seat 21. The plurality of mounting through holes 212 correspond one-to-one to the plurality of connecting through holes 112. One end of the upper connecting member 22 passes through the mounting through holes 212 and the connecting through holes 112 in sequence, and a first locking member 221 is provided at one end of the upper connecting member 22.

[0038] Specifically, one end of the first elastic member 99 abuts against the bottom of the upper joint seat 21 .

[0039] Specifically, the arc-shaped groove 111 is located at the center of the upper joint seat 21 .

[0040] Specifically, two limiting washers 422 are sleeved on the outside of the lower connecting member 42 . The two limiting washers 422 are respectively located at two ends of the second elastic member 100 , and one of the limiting washers 422 abuts against the top of the lower joint seat 41 .

[0041] Specifically, a mounting circular groove 101 is provided at the center of the top of the lower joint seat 41 and the pressure plate 5, and the two mounting circular grooves 101 are combined to form a cavity for placing the joint bearing 6, and a limiting clamping column 102 is provided at the center of the mounting circular groove 101, and the limiting clamping column 102 is located at the center of the joint bearing 6.

[0042] Specifically, fixing holes 411 are provided on both sides of the lower joint seat 41, a countersunk hole 51 is provided at the bottom of the pressure plate 5, one end of the lower connecting member 42 passes through the countersunk hole 51 to the fixing hole 411, and one end of the lower connecting member 42 is sleeved with a second locking member 421.

[0043] Specifically, the central axis of the upper connecting rod 1 and the central axis of the lower connecting rod 3 are both located on the same central axis.

[0044] Specifically, one surface of the joint bearing 6 faces the lower joint seat 41 , and the other surface of the joint bearing 6 faces the pressure plate 5 .

[0045] Embodiment 1

[0046] In order to ensure that the pressure rod will not deviate or deform during the downward pressing process, since the pressure rod will receive the thrust of the radial force during the downward pressing process, the pressure rod is easily deformed by the force during this process. Therefore, this technical problem is required. In this embodiment: an upper connecting rod 1, a floating component 2 and a lower connecting rod 3 are provided; the upper connecting rod 1 is arranged directly above the lower connecting rod 3, so that the floating component 2 is located between the upper connecting rod 1 and the lower connecting rod 3, and the floating component 2 includes an upper joint seat 21 and an upper connecting member 22. A connecting plate 11 is provided at the bottom of the upper connecting rod 1, and the upper joint seat 21 is located at the top of the lower connecting rod 3, so that the upper joint seat 21 passes through the upper connecting member 22. It is connected to the connecting plate 11, and an arc-shaped protrusion 211 is provided on the top of the upper joint seat 21, and an arc-shaped groove 111 is provided on the side of the connecting plate 11 facing the upper joint seat 21, so that the arc-shaped protrusion 211 is adapted to the arc-shaped groove 111, and a first elastic member 99 is sleeved on the outside of the upper connecting member 22. Therefore, when the lower connecting rod 3 is subjected to radial force, the arc-shaped protrusion 211 of the upper joint seat 21 can swing at any angle along the arc-shaped groove 111. When the external force disappears, the elastic force of the first elastic member 99 can reset the swinging angle. Therefore, the upper connecting rod 1 and the lower connecting rod 3 can be prevented from bending, deforming or deflecting due to radial force.

[0047] It should be noted that the first elastic member 99 can be a spring, which is a mechanical part that uses elasticity to work; a part made of elastic material deforms under the action of external force and returns to its original shape after the external force is removed.

[0048] It should be noted that, by opening a plurality of connecting through holes 112 around the connecting plate 11, and by providing a plurality of mounting through holes 212 on the outside of the upper joint seat 21, the plurality of mounting through holes 212 correspond one-to-one to the plurality of connecting through holes 112, so that one end of the upper connecting member 22 passes through the mounting through hole 212 and the connecting through hole 112 in sequence, and a first locking member 221 is provided at one end of the upper connecting member 22. Therefore, the upper joint seat 21 can be connected to the connecting plate 11 through the upper connecting member 22, and the position of the upper joint seat 21 and the connecting plate 11 is fixed by the first locking member 221.

[0049] It should be noted that, in order to ensure that the first elastic member 99 can be sufficiently stressed, one end of the first elastic member 99 can be abutted against the bottom of the upper joint seat 21. Therefore, when the upper joint seat 21 is pressed downward by the radial force, the first elastic member is compressed.

[0050] It should be noted that the arc groove 111 can be located at the center of the upper joint seat 21 to effectively ensure that when the connecting plate 11 is subjected to force on the upper joint seat 21, the positions of the arc groove 111 and the arc protrusion 211 are centered to ensure uniform force.

[0051] It should also be noted that in order to ensure uniform force, the central axis of the upper connecting rod 1 and the central axis of the lower connecting rod 3 are located on the same central axis, so that the upper connecting rod 1 can be aligned with the lower connecting rod 3, and when the upper connecting rod 1 is subjected to axial force, it can be transmitted to the lower connecting rod 3.

[0052] Embodiment 2

[0053] In order to realize automatic guiding when the pressure rod drives the pressure plate 5 to press down, since the existing pressure rod drives the pressure plate 5 to press down, it is easy to cause uneven force on the pressure plate 5 during pressing due to the deviation of the pressure rod, which leads to the failure of the pressure plate 5 to uniformly press the surface of the plate. In order to solve the above problem, in this embodiment: an upper connecting rod 1, a lower connecting rod 3 and a guide assembly 4 are provided, and the guide assembly 4 is arranged at the bottom of the lower connecting rod 3, and the guide assembly 4 includes a lower joint seat 41 and a lower connecting piece 42, and the pressure plate 5 is arranged directly below the lower joint seat 41. The lower joint seat 41 is connected to the pressure plate 5 through the lower connecting piece 42. A joint bearing 6 is arranged between the lower joint seat 41 and the pressure plate 5. A second elastic piece 100 is also sleeved on the outside of the lower connecting piece 42. The installation horizontality of the pressure plate 5 can be controlled by adjusting the lower connecting piece 42. When the lower connecting rod 3 drives the pressure plate 5 to press the workpiece, if the workpiece is uneven, the pressure plate 5 will drive the second elastic piece 100 to retract to achieve automatic guiding effect, which effectively ensures that when the pressure plate 5 presses the plate, the bottom surface of the pressure plate 5 is parallel to the pressure surface of the plate, thereby ensuring that the plate is pressed.

[0054] It should be noted that, by also sleeved on the outside of the lower connecting member 42, the two limiting washers 422 are respectively located at the two ends of the second elastic member 100, wherein one limiting washer 422 is abutted against the top of the lower joint seat 41, and the two limiting washers 422 play a supporting and force-bearing role on the two ends of the second elastic member 100.

[0055] It should be noted that by providing mounting circular grooves 101 at the top centers of the lower joint seat 41 and the pressure plate 5, the two mounting circular grooves 101 are merged to form a cavity for placing the joint bearing 6, and by providing a limiting clamping column 102 at the center of the mounting circular groove 101, the limiting clamping column 102 is located at the center of the joint bearing 6. Therefore, the mounting circular groove 101 can facilitate the placement of the joint bearing 6, and the limiting clamping column 102 can limit the joint bearing 6.

[0056] It should be noted that by providing fixed through holes 411 on both sides of the lower joint seat 41, and by providing a countersunk hole 51 at the bottom of the pressure plate 5, one end of the lower connecting member 42 is passed through the countersunk hole 51 to the fixed through hole 411, and by sleeved with a second locking member 421 on one end of the lower connecting member 42, the lower joint seat 41 can be connected to the pressure plate 5 through the lower connecting member 42, and the second locking member 421 can be used to limit the position of the lower joint seat 41 and the pressure plate 5.

[0057] According to the above embodiments, it is particularly noted that the second elastic member 100 can adopt a disc spring. The disc spring is also called Belleville spring washer, which was invented by the Frenchman Belleville. It is in the shape of a conical disc and can be used alone or in multiple connections in series or in parallel. It bears static or dynamic loads acting in the axial direction at the upper inner edge and the lower outer edge, and is deformed after being compressed until it is flattened, storing energy as a live load; when necessary, it is automatically converted into an additional compression load required for sealing to reduce the continuous tightening requirements of gaskets and packings during use. It should also be noted that in order to realize the rotation fine-tuning of the pressure plate 5, one side of the joint bearing 6 can face the lower joint seat 41, and the other side of the joint bearing 6 can also face the pressure plate 5. Therefore, when the position of the pressure plate 5 is adjusted, it is convenient for the pressure plate 5 to be rotated and fine-tuned at the lower joint seat 41.

[0058] In combination with the above embodiments, the upper connecting member 22 and the lower connecting member 42 can both be bolts. Bolt: A mechanical part, a cylindrical threaded fastener equipped with a nut, a type of locking member consisting of a head and a screw (i.e., a cylinder with an external thread), which needs to be matched with a nut to fasten two parts with through holes; this type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

[0059] According to the above description, when the upper connecting member 22 and the lower connecting member 42 are both bolts, the first locking member 221 and the second locking member 421 can both be nuts, so that the first locking member 221 locks the upper connecting member 22 and the second locking member 421 locks the lower connecting member 42.

[0060] The scheme of the utility model has been described in detail above with reference to the accompanying drawings. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the utility model. In addition, it can be understood that the steps in the method of the embodiment of the utility model can be adjusted in order, merged and deleted according to actual needs, and the structure in the device of the embodiment of the utility model can be merged, divided and deleted according to actual needs.

[0061] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An automatic bending center pressure rod mechanism, characterized in that: include: An upper connecting rod, a floating assembly, a lower connecting rod and a guide assembly; The upper connecting rod is located directly above the lower connecting rod, the floating assembly is located between the upper connecting rod and the lower connecting rod, the floating assembly includes an upper joint seat and an upper connecting member, a connecting plate is provided at the bottom of the upper connecting rod, the upper joint seat is located at the top of the lower connecting rod, and the upper joint seat is connected to the connecting plate through the upper connecting member, an arc-shaped protrusion is provided at the top of the upper joint seat, an arc-shaped groove is provided on a side of the connecting plate facing the upper joint seat, the arc-shaped protrusion is matched with the arc-shaped groove, and a first elastic member is sleeved on the outside of the upper connecting member; The guide assembly is arranged at the bottom of the lower connecting rod, and the guide assembly includes a lower joint seat and a lower connecting piece. A pressure plate is arranged directly below the lower joint seat, and the lower joint seat is connected to the pressure plate through the lower connecting piece. A joint bearing is arranged between the lower joint seat and the pressure plate, and a second elastic piece is sleeved on the outside of the lower connecting piece.

2. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: A plurality of connecting through holes are provided around the connecting plate, and a plurality of mounting through holes are provided on the outside of the upper joint seat. The plurality of mounting through holes correspond one-to-one to the plurality of connecting through holes, and one end of the upper connecting member passes through the mounting through hole and the connecting through hole in sequence, and a first locking member is provided at one end of the upper connecting member.

3. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: One end of the first elastic member abuts against the bottom of the upper joint seat.

4. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: The arc-shaped groove is located at the center of the upper joint seat.

5. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: Two limiting washers are also sleeved on the outside of the lower connecting member, and the two limiting washers are respectively located at two ends of the second elastic member, and one of the limiting washers is in contact with the top of the lower joint seat.

6. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: The lower joint seat and the pressure plate are both provided with mounting circular grooves at the top centers, and the two mounting circular grooves are combined to form a cavity for placing the joint bearing. A limiting clamping column is provided at the center of the mounting circular groove, and the limiting clamping column is located at the center of the joint bearing.

7. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: Both sides of the lower joint seat are provided with fixing through holes, the bottom of the pressure plate is provided with a countersunk hole, one end of the lower connecting piece passes through the countersunk hole to the fixing through hole, and one end of the lower connecting piece is sleeved with a second locking piece.

8. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: The central axis of the upper connecting rod and the central axis of the lower connecting rod are both located on the same central axis.

9. The automatic bending center pressure rod mechanism according to claim 1, characterized in that: One side of the joint bearing faces the lower joint seat, and the other side of the joint bearing faces the pressure plate.

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