Novel narrow-space hinge clamping mechanism

Abstract

A novel narrow-space hinge clamping mechanism comprises a support, a connecting plate, a positioning block, a pressing arm, a clamping block and an air cylinder, the air cylinder is installed at the rear end of the connecting plate, and a first connecting rod is hinged between a first hinge hole, located in the front side, of the pressing arm and a second hinge hole, located in the front side, of the connecting plate. The first connecting rod, the pressing arm, the second connecting rod and the connecting plate form a mutually-connected four-connecting-rod hinge mechanism, the pressing arm can swing front and back relative to the connecting plate along with the first connecting rod and the second connecting rod, and the rear side of the middle of the second connecting rod is connected with the front end of a connecting block. When the air cylinder works, the connecting block is pushed and pulled to drive the second connecting rod, the first connecting rod and the pressing arm to swing front and back relative to the connecting plate, so that the clamping block at the front end of the pressing arm presses or releases the positioning block. When the clamping mechanism is opened, the height occupied space is greatly reduced, the part taking and placing space is increased, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a clamping mechanism for machining, in particular to a hinge clamping mechanism suitable for narrow spaces. Background Art

[0002] During the process of machining (such as welding), a clamping mechanism is required to clamp and position the parts to be machined. Traditional clamping mechanisms, as shown in Figure 1 , include a support, a connecting plate, a positioning block, a pressing arm, and a cylinder. The bottom end of the connecting plate is connected to the support, the upper side of the front end of the connecting plate is connected to the positioning block, the pressing arm is hinged to the upper side of the rear end of the connecting plate, a clamping block is connected to the lower side of the front end of the pressing arm, the cylinder is installed at the rear side of the connecting plate, and the end of the piston rod of the cylinder is connected to the rear end of the pressing arm. The cylinder can drive the pressing arm to press against the positioning block, and the cylinder can also drive the pressing arm to open backward to release the parts pressed on the positioning block. However, when the cylinder pulls the pressing arm to open backward, when the pressing arm rotates upward and backward relative to the rotating shaft connected to the connecting plate, the height space occupied by the unfolding of the pressing arm is relatively large, affecting the picking and placing of parts. The reduction of the picking and placing efficiency of parts further affects the production efficiency. At the same time, in occasions with limited space, this existing clamping mechanism is not applicable. Therefore, it is necessary to develop a new clamping and positioning mechanism to solve the problems existing in the existing technology. Summary of the Invention

[0003] The purpose of the utility model is to provide a new type of narrow-space hinge clamping mechanism for the defects existing in the above-mentioned existing technology. When the clamping mechanism is opened, the height occupied space is greatly reduced, which can effectively increase the picking and placing space of parts and improve the production efficiency.

[0004] The technical solution adopted by the utility model to achieve the above purpose is: a new type of narrow-space hinge clamping mechanism, including a support, a connecting plate, a positioning block, a pressing arm, and a cylinder. The connecting plate is connected to the support, the positioning block is fixedly connected to the upper side of the front end of the connecting plate, the rear side of the pressing arm is hinged to the upper side of the connecting plate, a clamping block that can press on the positioning block is connected to the lower side of the front end of the pressing arm, the piston rod of the cylinder is installed upward at the rear end of the connecting plate. Two front and rear arranged hinge holes I are respectively arranged at the position of the pressing arm near the rear side, and two front and rear arranged hinge holes II are respectively arranged at the position of the upper end of the connecting plate near the rear side. A connecting rod I is respectively hinged between the front hinge hole I of the pressing arm and the front hinge hole II of the connecting plate, and a connecting rod II is respectively hinged between the rear hinge hole I of the pressing arm and the rear hinge hole II of the connecting plate. The connecting rod I, the pressing arm, the connecting rod II, and the connecting plate form a mutually connected four-bar hinge mechanism. The pressing arm can swing back and forth relative to the connecting plate together with the connecting rod I and the connecting rod II. The rear side of the middle of the connecting rod II is connected to the front end of the connecting block, and the rear end of the connecting block is hinged to the end of the piston rod of the cylinder through a rotating shaft I. When the cylinder works, the piston rod of the cylinder drives the connecting block, and then drives the connecting rod II, the connecting rod I and the pressing arm to swing back and forth relative to the connecting plate, so that the clamping block at the front end of the pressing arm presses or releases the positioning block.

[0005] A further technical solution of the present utility model is that a rotating shaft is respectively connected to the first hinge hole on the front side of the pressing arm and the second hinge hole on the front side of the connecting plate. Both ends of the rotating shaft protrude from the surfaces of the pressing arm and the connecting plate respectively. The rotating shafts protruding from both sides of the pressing arm and the connecting plate are respectively hinged to the first connecting rod; a rotating shaft is respectively connected to the first hinge hole on the rear side of the pressing arm and the second hinge hole on the rear side of the connecting plate. Both ends of the rotating shaft protrude from the surfaces of the pressing arm and the connecting plate respectively. The rotating shafts protruding from both sides of the pressing arm and the connecting plate are respectively hinged to the second connecting rod.

[0006] A further technical solution of the present utility model is that a transfer block protruding backward is provided in the middle of the second connecting rod. The transfer blocks of the second connecting rod connected to both sides of the pressing arm and the connecting plate are respectively located on both sides of the front end of the connecting block. The fixing bolt passes through the transfer blocks of the two second connecting rods and the connecting block and is fixed by a nut.

[0007] A further technical solution of the present utility model is that the distance between the two first hinge holes at the front and rear of the pressing arm is equal to the distance between the two second hinge holes at the front and rear of the connecting plate, and the first connecting rod and the second connecting rod are parallel to each other.

[0008] A novel narrow - space hinge clamping mechanism of the present utility model has the following beneficial effects: By hinging the first connecting rod and the second connecting rod between the rear end of the pressing arm and the connecting plate, the first connecting rod, the pressing arm, the second connecting rod, and the connecting plate form a mutually - connected four - link hinge mechanism. The rear end of the second connecting rod is connected to the piston rod of the cylinder through the connecting block. When the cylinder pushes and pulls the connecting block, it can further push and pull the second connecting rod. When the second connecting rod is pushed and pulled, the pressing arm of the four - link hinge mechanism can swing back and forth relative to the connecting plate driven by the first connecting rod and the second connecting rod. When the pressing arm swings forward, the clamping block at its front end presses the positioning block. When the pressing arm swings backward, the clamping block at its front end releases the positioning block. The pressing arm realizes pressing or releasing the positioning block through the back - and - forth horizontal swing. That is, when the pressing arm is opened, the height occupied space in the vertical direction does not increase significantly. After measurement, the height occupied space when the pressing arm is opened is reduced by 38% compared with the background technology. It is convenient for manual loading and unloading of the sheet material, and the production efficiency is increased by 10% through preliminary statistics. After adopting the structure of the present utility model, it can be installed in a relatively narrow space, and the applicability is stronger.

[0009] The following further explains a novel narrow - space hinge clamping mechanism of the present utility model in conjunction with the drawings and embodiments. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the pressing arm of the clamping mechanism in the prior art when it is opened;

[0011] Figure 2 is the front view of a novel narrow - space hinge clamping mechanism of the utility model;

[0012] Figure 3 is Figure 2Top view of the hinge clamping mechanism shown;

[0013] Figure 4 is Figure 3 Cross-sectional view along the A-A direction;

[0014] Figure 5 is Figure 2 Stereogram of the hinge clamping mechanism shown;

[0015] Figure 6 is Figure 2 Schematic structural diagram of the pressing arm of the hinge clamping mechanism shown being opened;

[0016] Explanation of the reference numerals in the attached drawings: 1 - support, 2 - connecting plate, 3 - positioning block, 4 - clamping block, 5 - pressing arm, 6 - cylinder, 7 - rotating shaft II, 8 - limiting block, 9 - rotating shaft, 10 - connecting rod I, 11 - connecting rod II, 12 - adapter block, 13 - connecting block, 14 - rotating shaft I, 15 - piston rod, 16 - hinge hole I, 17 - hinge hole II. Specific implementation manner

[0017] As Figures 2 to 6 shown, a new type of narrow - space hinge clamping mechanism of the present utility model includes a support 1, a connecting plate 2, a positioning block 3, a pressing arm 5, a clamping block 4, and a cylinder 6. The connecting plate 2 is installed on the support 1 by screws and pins. The positioning block 3 is connected to the upper front side of the connecting plate 2 by screws and pins. The positioning block 3 is used to support the part to be clamped. The rear side of the pressing arm 5 is hinged to the upper side of the connecting plate 2. The clamping block 4 is installed on the lower front side of the pressing arm 5 by screws and pins. The clamping block 4 can press on the positioning block 3 and clamp the part to be clamped together with the positioning block 3.

[0018] As Figure 2 、 Figure 5 shown, two hinge holes I 16 arranged front - to - back are respectively provided at the rear - side position of the pressing arm 5, and two hinge holes II 17 arranged front - to - back are respectively provided at the rear - side position of the upper end of the connecting plate 2. The distance between the front and rear hinge holes I 16 of the pressing arm 5 is equal to the distance between the front and rear hinge holes II 17 of the connecting plate 2. Figure 2The direction indicated by the arrow F is the front. When the clamping block 4 under the pressing arm 5 is directly opposite the positioning block 3 on the connecting plate 2, the two hinge holes one 16 are respectively located above the front sides of the two hinge holes two 17. Between the hinge hole one 16 on the front side of the pressing arm 5 and the hinge hole two 17 on the front side of the connecting plate 2, connecting rods one 10 are respectively hinged. Between the hinge hole one 16 on the rear side of the pressing arm 5 and the hinge hole two 17 on the rear side of the connecting plate 2, connecting rods two 11 are respectively hinged. After the connecting rods one 10 and the connecting rods two 11 are installed, the connecting rods one 10 and the connecting rods two 11 are parallel to each other. In this embodiment, a rotating shaft 9 is respectively connected in the hinge hole one 16 on the front side of the pressing arm 5 and the hinge hole two 17 on the front side of the connecting plate 2. Both ends of the rotating shaft 9 protrude from the surfaces of the pressing arm 5 and the connecting plate 2. The rotating shafts 9 protruding from both sides of the pressing arm 5 and the connecting plate 2 are respectively hinged to the connecting rods one 10, that is, a connecting rod one 10 is connected between the front surface of the pressing arm 5 ( Figure 2 the surface seen in is the front surface) and the front surface of the connecting plate 2, and a connecting rod one 10 is also connected between the back surface of the pressing arm 5 and the back surface of the connecting plate 2. The two connecting rods one 10 are symmetrically arranged on the front and back surfaces of the pressing arm 5, as Figure 3 shown. A rotating shaft 9 is respectively connected in the hinge hole one 16 on the rear side of the pressing arm 5 and the hinge hole two 17 on the rear side of the connecting plate 2. Both ends of the rotating shaft 9 protrude from the surfaces of the pressing arm 5 and the connecting plate 2. The rotating shafts 9 protruding from both sides of the pressing arm 5 and the connecting plate 2 are respectively hinged to the connecting rods two 11, that is, a connecting rod two 11 is connected between the front surface of the pressing arm 5 and the front surface of the connecting plate 2, and a connecting rod two 11 is also connected between the back surface of the pressing arm 5 and the back surface of the connecting plate 2. The two connecting rods two 11 are symmetrically arranged on the front and back surfaces of the pressing arm 5, as Figure 3 shown. The connecting rods one 10, the pressing arm 5, the connecting rods two 11, and the connecting plate 2 form a mutually connected four-bar hinge mechanism. The two connecting rods one 10 symmetrically arranged on the front and back surfaces of the pressing arm 5 are regarded as one link mechanism in the four-bar hinge mechanism because they are symmetric to each other and have the same movement trajectory. The two connecting rods two 11 symmetrically arranged on the front and back surfaces of the pressing arm 5 are also regarded as one link mechanism in the four-bar hinge mechanism because they are symmetric to each other and have the same movement trajectory. In the four-bar hinge mechanism, the pressing arm 5 can swing back and forth relative to the connecting plate 2 together with the connecting rods one 10 and the connecting rods two 11.

[0019] Such as Figures 2 to 6As shown in the figure, the piston rod 15 of the air cylinder 6 is installed upward at the rear end of the connecting plate 2. The air cylinder 6 is hinged to the hinge hole on the protruding part at the lower side of the rear end of the connecting plate 2 through the second rotating shaft 7. The rear side of the middle part of the second connecting rod 11 is connected to the front end of the connecting block 13. A transfer block 12 protruding backward is provided in the middle of the second connecting rod 11. The transfer blocks 12 of the second connecting rods 11 connected to the two side surfaces of the pressing arm 5 and the connecting plate 2 are respectively located on both sides of the front end of the connecting block 13. The fixing bolt passes through the transfer blocks 12 of the two second connecting rods 11 and the connecting block 13 and is fixed by a nut. The rear end of the connecting block 13 is hinged to the end of the piston rod 15 of the air cylinder 6 through the first rotating shaft 14. The air cylinder 6 is rotationally connected to the connecting block 13 and the connecting plate 2 through the first rotating shaft 14 and the second rotating shaft 7. When the air cylinder 6 works, the piston rod 15 of the air cylinder 6 drives the second connecting rod 11, the first connecting rod 10 and the pressing arm 5 to swing back and forth relative to the connecting plate 2 by pushing and pulling the connecting block 13, so that the clamping block 4 at the front end of the pressing arm 5 presses or releases the positioning block 3.

[0020] During operation, the air cylinder 6 expands and contracts to drive the movement of the four-bar hinge mechanism composed of the connecting plate 2, the first connecting rod 10, the second connecting rod 11 and the pressing arm 5, so as to realize the clamping and opening of the pressing arm 5, as Figure 6 shown. The clamping and opening of the pressing arm 5 are realized by the forward and backward swinging of the four-bar hinge mechanism. The space occupied by the pressing arm 5 in the vertical direction is relatively small during the movement process, which is greatly reduced compared with the background technology. This not only facilitates the manual loading and unloading of the sheet material, but also improves the production efficiency.

[0021] The above embodiments are only the preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A novel hinge clamping mechanism for a narrow space, comprising a support (1), a connecting plate (2), a positioning block (3), a pressure arm (5), and a cylinder (6), wherein the connecting plate (2) is connected to the support (1), the positioning block (3) is fixedly connected to the upper side of the front end of the connecting plate (2), the rear side of the pressure arm (5) is hinged to the upper side of the connecting plate (2), the lower side of the front end of the pressure arm (5) is connected to a clamping block (4) that can be pressed on the positioning block (3), and the piston rod (15) of the cylinder (6) is installed at the rear end of the connecting plate (2) with its piston rod (15) facing upward, characterized in that: The pressure arm (5) is provided with two hinge holes (16) arranged front and rear respectively at the rear side, and the upper end of the connecting plate (2) is provided with two hinge holes (17) arranged front and rear respectively. The hinge hole (16) located at the front side of the pressure arm (5) and the hinge hole (17) located at the front side of the connecting plate (2) are respectively hinged to the connecting rod (10). The hinge hole (16) located at the rear side of the pressure arm (5) and the hinge hole (17) located at the rear side of the connecting plate (2) are respectively hinged to the connecting rod (11). The connecting rod (10), the pressure arm (5), the connecting rod (11) and the connecting plate (2) form a series of hinge holes. The four-link hinge mechanism is interconnected, and the pressure arm (5) can swing forward and backward relative to the connecting plate (2) together with the connecting rod 1 (10) and the connecting rod 2 (11). The middle rear side of the connecting rod 2 (11) is connected to the front end of the connecting block (13). The rear end of the connecting block (13) is hinged to the end of the piston rod (15) of the cylinder (6) through the rotating shaft 1 (14). When the cylinder (6) is working, the piston rod (15) of the cylinder (6) drives the connecting rod 2 (11), the connecting rod 1 (10) and the pressure arm (5) to swing forward and backward relative to the connecting plate (2), so that the clamping block (4) at the front end of the pressure arm (5) presses or releases the positioning block (3).

2. A novel narrow space hinge clamping mechanism as claimed in claim 1, characterized in that: A rotating shaft (9) is connected to the hinge hole 1 (16) located at the front side of the pressure arm (5) and the hinge hole 2 (17) located at the front side of the connecting plate (2), respectively. The two ends of the rotating shaft (9) protrude from the surfaces of the pressure arm (5) and the connecting plate (2), respectively. The rotating shaft (9) protruding from the surfaces of the pressure arm (5) and the connecting plate (2) are respectively hinged to the connecting rod 1 (10); the hinge hole 1 (16) located at the rear side of the pressure arm (5) and the hinge hole 2 (17) located at the rear side of the connecting plate (2) are respectively connected to the rotating shaft (9), and the two ends of the rotating shaft (9) protrude from the surfaces of the pressure arm (5) and the connecting plate (2), respectively. The rotating shaft (9) protruding from the surfaces of the pressure arm (5) and the connecting plate (2) are respectively hinged to the connecting rod 2 (11).

3. A novel narrow space hinge clamping mechanism as claimed in claim 2, characterized in that: A transfer block (12) protruding backwards is provided in the middle of the second connecting rod (11); the transfer blocks (12) of the second connecting rod (11) connected to the surfaces of both sides of the pressure arm (5) and the connecting plate (2) are respectively located on both sides of the front end of the connecting block (13); and the fixing bolts pass through the two transfer blocks (12) of the second connecting rod (11) and the connecting block (13) and are then fixed by nuts.

4. A novel narrow space hinge clamping mechanism as claimed in claim 2, characterized in that: The spacing between the two front and rear hinge holes 1 (16) of the pressure arm (5) is equal to the spacing between the two front and rear hinge holes 2 (17) of the connecting plate (2), and the connecting rod 1 (10) and the connecting rod 2 (11) are parallel to each other.

Images