Pressing mechanism for narrow space

Abstract

The utility model relates to a hold-down mechanism for a narrow space, which comprises a cylinder barrel, a piston rod, a first connecting rod, a second connecting rod, a support rod and a hold-down lever, the piston rod is arranged in the cylinder barrel and driven by the cylinder barrel to slide up and down, and a cross rod is horizontally and fixedly arranged at the top of the piston rod. The two ends of the supporting rod are hinged to the top of the air cylinder barrel and the middle of the pressing lever respectively, the two ends of the first connecting rod are hinged to the middle of the supporting rod and the near end of the cross rod respectively, the second connecting rod is hinged to the tail of the pressing lever and the far end of the cross rod respectively, and when the piston rod retracts into the air cylinder barrel downwards, the first connecting rod abuts against the supporting rod obliquely from the lower portion. The hold-down mechanism for the narrow and small space is simple and small in structure, adopts a lever and a connecting rod mechanism, can realize two actions of stretching and hold-down by only one air cylinder, is small in occupied area, is very suitable for being applied to operation in the narrow and small space, and is very convenient to maintain due to the fact that the hold-down mechanism is very simple in structure, low in failure rate and very convenient to maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressing mechanisms, and particularly relates to a pressing mechanism for narrow spaces. Background Art

[0002] When operating in a narrow space, due to the limitation of the space size, generally a mechanical linkage mechanism is used to achieve its function. When it is necessary to simultaneously achieve two actions of extending and pressing, generally two cylinders plus other auxiliary mechanisms are required to achieve the function. However, due to the narrow space, the structure should be as simple and compact as possible. A complex structure not only occupies space but also is not easy to maintain. Summary of the Utility Model

[0003] In view of this, the purpose of the present utility model is to provide a pressing mechanism for narrow spaces, which adopts a lever plus a connecting rod mechanism, and only one cylinder can achieve two actions of extending and pressing.

[0004] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0005] A pressing mechanism for narrow spaces includes a cylinder barrel, a piston rod, a first connecting rod, a second connecting rod, a support rod, and a pressing lever. The piston rod is arranged inside the cylinder barrel and can slide up and down under the drive of the cylinder barrel. A cross bar is horizontally and fixedly arranged at the top of the piston rod. The two ends of the support rod are respectively hinged to the top of the cylinder barrel and the middle part of the pressing lever. The two ends of the first connecting rod are respectively hinged to the middle part of the support rod and the proximal end of the cross bar. The second connecting rod is respectively hinged to the tail of the pressing lever and the distal end of the cross bar. When the piston rod retracts downward into the cylinder barrel, the first connecting rod obliquely abuts against the support rod from below.

[0006] To better implement the present utility model, further optimization is made to the above structure. The top of the piston rod and the cross bar are fixedly connected by bolts.

[0007] To better implement the present utility model, further optimization is made to the above structure. The head of the pressing lever is a wedge-shaped structure that is narrow in the front and wide in the back.

[0008] To better implement the present utility model, further optimization is made to the above structure. The cylinder barrel is a rectangular structure.

[0009] To better implement the present utility model, further optimization is made to the above structure. The piston rod is at the center of the cylinder barrel.

[0010] To better implement the present utility model, further optimization is made to the above structure. The support rod is hinged to the side of the top of the cylinder barrel.

[0011] In order to better implement the present utility model, further optimization is made to the above structure. A boss is provided at the hinge joint between the support rod and the top of the cylinder barrel. When the piston rod retracts downward into the cylinder barrel, the height of the boss is higher than the height of the cross bar.

[0012] The present utility model has the following beneficial effects compared with the prior art:

[0013] The pressing mechanism for narrow spaces provided by the present utility model has a simple and compact structure. It adopts a lever and link mechanism, and only one cylinder can achieve two actions of extending and pressing. It occupies a small area and is very suitable for use in narrow space operations. Moreover, due to the very simple structure of this device, the failure rate is low and the maintenance is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 is a schematic structural diagram when the piston rod of the present utility model retracts downward;

[0016] Figure 2 is a schematic structural diagram when the piston rod of the present utility model extends upward.

[0017] In the figure:

[0018] 1 - cylinder barrel, 101 - boss, 2 - piston rod, 201 - cross bar, 3 - first link, 4 - second link, 5 - support rod, 6 - pressing lever, 7 - workpiece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present utility model.

[0020] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" 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, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Referring to Figure 1 and Figure 2 , the pressing mechanism provided by the present utility model for a narrow space includes a cylinder barrel 1, a piston rod 2, a first connecting rod 3, a second connecting rod 4, a support rod 5, and a pressing lever 6. The piston rod 2 is arranged in the cylinder barrel 1 and can slide up and down under the drive of the cylinder barrel 1, extending and retracting from the cylinder barrel 1. A cross bar 201 is horizontally fixed to the top of the piston rod 2 by bolts. Both ends of the support rod 5 are respectively hinged to the top of the cylinder barrel 1 and the middle part of the pressing lever 6. Both ends of the first connecting rod 3 are respectively hinged to the middle part of the support rod 5 and the proximal end of the cross bar 201. The second connecting rod 4 is respectively hinged to the tail of the pressing lever 6 and the distal end of the cross bar 201. The second connecting rod 4 connecting the tail of the pressing lever 6 serves to support the pressing lever 6, preventing the pressing lever 6 from rotating with only one support point in the middle. When the piston rod 2 retracts downward into the cylinder barrel 1, the first connecting rod 3 obliquely abuts against the support rod 5 from below, always maintaining a stressed state.

[0023] The head of the pressing lever 6 has a wedge-shaped structure that is narrow at the front and wide at the rear, reducing the contact area of the head and allowing it to extend into a smaller gap to avoid knocking interference. The cylinder barrel 1 has a rectangular structure, and the piston rod 2 is located at the center of the cylinder barrel 1. The support rod 5 is hinged to the side of the top of the cylinder barrel 1. A boss 101 is provided at the hinge joint between the support rod 5 and the top of the cylinder barrel 1. When the piston rod 2 retracts downward into the cylinder barrel 1, the height of the boss 101 is higher than the height of the cross bar 201, keeping the first link 3 in a state of upwardly inclined support for the support rod 5. When the piston rod 2 extends upward out of the cylinder barrel 1, the function of driving the support rod 5 to move together with the first link 3 can be achieved.

[0024] Working principle:

[0025] During operation, first, the piston rod 2 extends upward out of the cylinder barrel 1, simultaneously driving the first link 3 and the second link 4 to move upward. The first link 3 transfers the pressure to the support rod 5, pushing the support rod 5 to rotate. Since the bottom of the support rod 5 is hinged to the top of the cylinder barrel 1, the support rod 5 rotates around the hinge point at the bottom. During the rotation process, the pressing lever 6 connected to the top of the support rod 5 rotates together with the top of the support rod 5, finally pressing the workpiece 7 in front. Its movement trajectory is an arc line, simultaneously realizing the two actions of forward extension and downward pressing, with a simple and compact structure. At the same time, the second link 4 provides support for the pressing lever 6 to prevent the pressing lever 6 from rotating.

[0026] As described above, only the specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A clamping mechanism for a narrow space, characterized in that: The invention comprises a cylinder barrel (1), a piston rod (2), a first connecting rod (3), a second connecting rod (4), a support rod (5) and a clamping lever (6); the piston rod (2) is arranged in the cylinder barrel (1) and can slide up and down when driven by the cylinder barrel (1); a cross rod (201) is fixedly arranged horizontally on the top of the piston rod (2); the two ends of the support rod (5) are respectively hinged to the top of the cylinder barrel (1) and the middle of the clamping lever (6); the two ends of the first connecting rod (3) are respectively hinged to the middle of the support rod (5) and the proximal end of the cross rod (201); the second connecting rod (4) is respectively hinged to the tail of the clamping lever (6) and the distal end of the cross rod (201); when the piston rod (2) is retracted downward into the cylinder barrel (1), the first connecting rod (3) is tilted from below and abuts against the support rod (5).

2. A clamping mechanism for a narrow space according to claim 1, characterized in that: The top of the piston rod (2) is fixedly connected to the cross bar (201) by means of bolts.

3. The clamping mechanism for a narrow space according to claim 1, characterized in that: The head of the pressing lever (6) is a wedge-shaped structure that is narrow at the front and wide at the rear.

4. The clamping mechanism for a narrow space according to claim 1, characterized in that: The cylinder barrel (1) is a rectangular structure.

5. A clamping mechanism for a narrow space according to claim 4, characterized in that: The piston rod (2) is located at the center of the cylinder barrel (1).

6. A clamping mechanism for a narrow space according to claim 5, characterized in that: The support rod (5) is hinged to the side of the top of the cylinder barrel (1).

7. A clamping mechanism for a narrow space according to claim 6, characterized in that: A boss (101) is provided at the hinge between the support rod (5) and the top of the cylinder barrel (1); when the piston rod (2) is retracted downward into the cylinder barrel (1), the height of the boss (101) is higher than the height of the cross bar (201).

Images