Steel pipe clamping mechanism

Abstract

The utility model provides a steel pipe clamping mechanism which comprises an installation frame, a clamping mechanism and a clamping mechanism. The installation frame is installed on a corresponding forklift, two forks extending forwards are arranged on the front side of the installation frame, and sliding grooves are formed in the opposite sides of the two forks respectively. One side of the clamping arm is rotationally arranged at the upper end of the mounting frame, the other side of the clamping arm extends forwards and then is rotationally provided with a movable arm, a limiting baffle is arranged on the front portion of the other side of the clamping arm, the limiting baffle is arranged on the front side of the upper end of the movable arm in a blocking mode, and a sensing device is arranged on the front side of the movable arm; the clamping driving device is arranged on the mounting frame and is used for driving the clamping arm to swing up and down; the limiting device comprises two sliding blocks arranged in the two sliding grooves in a sliding mode respectively, a driven rod connected with the two sliding blocks and a locking piece used for locking the sliding blocks, and limiting pieces driven by the telescopic driving device to extend outwards or retract inwards are arranged in the sliding blocks. The limiting part can assist the limiting baffle to limit forward swing of the movable arm, up-down double limiting is formed on the movable arm, the stability of the movable arm in use is improved, the service life of the limiting baffle is prolonged, and the maintenance frequency and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the field of clamping mechanisms, in particular to a steel pipe clamping mechanism. Background Art

[0002] At present, in order to adapt to different working conditions, forklifts are equipped with various special attachments. Forklifts combined with special attachments can easily realize actions such as clamping, rotating, and side shifting of goods. For the clamping of steel pipes, usually after assembling a steel pipe clamping mechanism on a forklift, several steel pipes are stacked, and after the steel pipe stack is lifted by the forklift fork, the clamping claws of the steel pipe clamping mechanism are lowered to clamp the steel pipe stack.

[0003] The existing steel pipe clamping mechanism, for example, the prior application named "Energy-saving steel pipe clamp for forklift" with application number CN201920178750.6, has a movable swing arm at the other end of the clamping arm, and a limit baffle is provided at the end of the other end of the clamping arm. When one side of the movable swing arm abuts against the limit baffle, the movable swing arm is in a vertical state. Therefore, when the clamping arm swings down to the movable swing arm abutting the steel pipe, the movable swing arm is limited by the limit baffle. However, such a setting makes only the upper end of the movable swing arm limited, and the force of the steel pipe on the movable swing arm is mainly concentrated on its lower part. During the handling process, there is a risk of damage to the limit baffle due to excessive force, and the size and specifications of the steel pipe stack formed by stacking several steel pipes cannot be completely the same. The driver's sight in the car is blocked by the steel pipe stack, and it is difficult to judge whether the movable swing arm just embraces the steel pipe stack. It is easy to cause excessive embrace to cause deformation of the steel pipe, or there is a large embrace gap to cause the steel pipe stack to loosen.

[0004] The purpose of the present invention is to design a steel pipe clamping mechanism in view of the above problems in the prior art. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a steel pipe clamping mechanism, which can effectively solve the problems existing in the above-mentioned prior art.

[0006] The technical solution of the utility model is:

[0007] A steel pipe clamping mechanism, comprising:

[0008] A mounting frame is mounted on a corresponding forklift and is provided with two forks extending forward on the front side, and slide grooves are provided on opposite sides of the two forks;

[0009] A clamping arm, one side of which is rotatably arranged at the upper end of the mounting frame, and the other side of which is extended forward and then rotatably arranged with a movable arm, a limit baffle is arranged at the front of the upper end of the movable arm at the front of the movable arm, and a sensing device is arranged at the front of the movable arm;

[0010] A clamping drive device, disposed on the mounting frame and used to drive the clamping arm to swing up and down;

[0011] The limiting device includes two sliding blocks respectively slidably arranged in the two sliding grooves, a driven rod connecting the two sliding blocks, and a locking member for locking the sliding blocks. The sliding block is provided with a limiting member driven by the telescopic driving device to extend or retract; the clamping driving device drives the clamping arm to drive the movable arm to swing down to between the two forks and push the driven rod to drive the two sliding blocks to slide until the sensing device senses the corresponding goods on the forks, and then the locking member locks the sliding block and the telescopic driving device drives the limiting member to extend to the lower rear side of the movable arm.

[0012] Furthermore, a rack is provided at the bottom of the slide groove, the slider includes a gear rotatably arranged and meshing with the rack, the locking member is rotatably arranged in the slider and one end is linked to the limiting member, and the other end of the locking member is set as an engaging portion adapted to the gear, and after the telescopic driving device drives the limiting member to extend outward, one end of the locking member swings in linkage and drives the meshing portion to swing to mesh and lock the gear.

[0013] Furthermore, the locking member is extended forward and backward, and the rear ends of the locking members in the two sliders extend in arcs in opposite directions to form the meshing portion, the gear is arranged between the locking member and the rack, and the meshing portion is provided with a plurality of meshing teeth matched with the gear on one side close to the gear, and the front ends of the locking members in the two sliders extend in arcs in opposite directions to form a U-shaped linkage portion, and the inner end portion of the limit member is inserted in the linkage portion and is penetrated by a rotating shaft rotatably connected to the linkage portion.

[0014] Furthermore, the slider is hollow and has an opening in the middle of the bottom, a first shaft and a second shaft are transversely arranged in the slider, the gear is rotatably sleeved on the first shaft and the lower end passes through the opening in the middle of the bottom of the slider to engage with the rack, and the locking piece is rotatably sleeved on the second shaft.

[0015] Furthermore, the outer end of the limit member passes through the side wall of the slider, the telescopic drive device includes an electromagnet and a spring arranged between the electromagnet and the inner end of the limit member, and a magnetic attraction portion made of magnetic material is provided on the side of the inner end of the limit member close to the spring. When the electromagnet is powered off, the limit member is pushed outward by the elastic force of the spring to extend outside the slider, and when the electromagnet is powered on, the limit member is magnetically attracted and retracted into the slider.

[0016] Furthermore, the slide groove is arranged at the front part of the fork, and the sliding block extends oppositely at two sides of one end close to the rack to form a sliding part, and opposite depressions are arranged on two sides of the bottom of the slide groove to match the sliding part.

[0017] Furthermore, the sensing device is configured as a pressure sensor, and the clamping drive device is configured as a telescopic cylinder having a fixed end rotatably connected to the middle of the mounting frame and a telescopic end rotatably connected to the rear end of the clamping arm.

[0018] Therefore, the utility model provides the following effects and / or advantages:

[0019] 1. The present application adds a sensing device and a limiting device, so that a limiting member that is driven by a telescopic driving device to extend or retract is provided in the slider; the clamping driving device drives the clamping arm to drive the movable arm to swing down to between the two forks to push the driven rod, so as to drive the two sliders to slide until the sensing device senses the corresponding goods on the forks, and then the locking member locks the slider, and the telescopic driving device drives the limiting member to extend outward to the rear side of the movable arm. Thus, the sensing device can automatically sense whether the movable arm swings down to the right position, so as to achieve stable engagement with the steel pipe stack on the fork, and avoid the situation that it is difficult to manually judge whether the movable swing arm just embraces the steel pipe stack, resulting in excessive engagement and deformation of the steel pipe, or the steel pipe stack is loosened due to excessive engagement gap, and then the limiting member is set at the rear side of the lower part of the movable arm, so that when the movable arm is under pressure during the process of transporting the steel pipe, the auxiliary limiting baffle plate limits the forward swing of the movable arm, forming double limits on the upper and lower sides of the movable arm, improving the stability of the movable arm when in use, and at the same time improving the service life of the limiting baffle plate, reducing the maintenance frequency and cost.

[0020] 2. The present application realizes that the gear can be locked at any position through a locking member linked with the limit member, thereby locking the slider. Compared with the traditional pin and socket matching method, the adaptability of the slider locking position is improved. At the same time, the locking member is driven by the extension of the limit member to swing and engage the gear, so that the meshing teeth of the meshing part and the rack can mesh and lock the gear on both sides, which can improve the stability of the locking member locking the slider, avoid the slider slipping when vibration occurs during transportation, and cause the limiting function of the limit member to fail, thereby improving the overall stability of the limiting device.

[0021] 3. The present application arranges the meshing part and the linkage part with arc-shaped extension, so that the meshing part is meshed and locked by swinging back and forth instead of swinging left and right, thereby increasing the swinging and locking stroke of the meshing part, thereby expanding the upward and downward swinging stroke of the linkage part as the limit member extends outward, thereby increasing the extending length of the limit member, thereby increasing the limiting strength of the limit member on the movable arm.

[0022] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1The utility model provides a structural schematic diagram of a steel pipe clamping mechanism.

[0024] Figure 2 This is a schematic structural diagram of the limiting device provided by the utility model.

[0025] Figure 3 for Figure 2 Schematic diagram of the half-section partial structure.

[0026] Figure 4 This is a sectional partial structural stereogram of the limiting device provided by the utility model. DETAILED DESCRIPTION

[0027] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the accompanying drawings:

[0028] refer to Figure 1-4 , a steel pipe clamping mechanism, comprising:

[0029] The mounting frame 1 is mounted on a corresponding forklift and is provided with two forks 11 extending forward on the front side, and slide grooves 111 are respectively provided on opposite sides of the two forks 11;

[0030] A clamping arm 2, one side of which is rotatably arranged at the upper end of the mounting frame 1, and the other side of which is extended forward and then rotatably arranged with a movable arm 3, a limit baffle 21 is arranged at the front of the other side of the clamping arm 2, and the limit baffle 21 is arranged at the front side of the upper end of the movable arm 3, and a sensing device is arranged at the front side of the movable arm 3;

[0031] A clamping drive device 4, which is disposed on the mounting frame 1 and is used to drive the clamping arm 2 to swing up and down;

[0032] The limiting device 5 includes two sliders 51 respectively slidably arranged in the two slide grooves 111, a driven rod 52 connecting the two sliders 51, and a locking member 53 for locking the slider 51. The slider 51 is provided with a limiting member 55 driven by the telescopic driving device 54 to extend or retract. Specifically, the limiting member 55 extends or retracts perpendicular to the slider 51 in the left and right direction; the clamping driving device 4 drives the clamping arm 2 to drive the movable arm 3 to swing down to between the two forks 11 and push the driven rod 52 to drive the two sliders 51 to slide until the sensing device senses the corresponding goods on the forks 11, and then the locking member 53 locks the slider 51, and the telescopic driving device 54 drives the limiting member 55 to extend to the lower rear side of the movable arm 3.

[0033] The arrangement of the above structure can automatically sense whether the movable arm 3 is in place through the sensing device, so as to achieve stable engagement of the steel pipe stack on the fork 11, and avoid the situation that it is difficult to manually judge whether the movable swing arm just embraces the steel pipe stack, resulting in excessive engagement leading to deformation of the steel pipe, or too large an engagement gap leading to loosening of the steel pipe stack. Then, a limit stop is set at the lower rear side of the movable arm 3 through the limit member 55, so that when the movable arm 3 is under pressure during the transportation of the steel pipe, the auxiliary limit baffle 21 limits the forward swing of the movable arm 3, and forms double limits on the upper and lower sides of the movable arm 3, thereby improving the stability of the movable arm 3 when in use, and at the same time increasing the service life of the limit baffle 21, and reducing the maintenance frequency and cost.

[0034] In order to improve the stability and adaptability of the locking member 53, a sliding rack 112 is provided at the bottom of the sliding groove 111, and the slider 51 includes a gear 56 that is rotatably set and meshes with the sliding rack 112. The locking member 53 is rotatably set in the slider 51 and one end is linked to the limiting member 55. The other end of the locking member 53 is set as a meshing portion 531 adapted to the gear 56. After the telescopic driving device 54 drives the limiting member 55 to extend outward, one end of the locking member 53 swings in a linked manner and drives the meshing portion 531 to swing to mesh and lock the gear 56. The locking member 53 linked with the limit member 55 can lock the gear 56 at any position, thereby locking the slider 51. Compared with the traditional pin and socket matching method, the adaptability of the locking position of the slider 51 is improved. At the same time, the locking member 53 is driven by the extension of the limit member 55 to swing and engage the gear 56, so that the meshing teeth 532 of the meshing portion 531 and the sliding rack 112 can mesh and lock the gear 56 on both sides, which can improve the stability of the locking member 53 on the slider 51, avoid the slider 51 slipping when vibration occurs during transportation, and cause the limiting function of the limit member 55 to fail, thereby improving the overall stability of the limiting device 5.

[0035] In order to increase the extension length of the limit member 55 under the limitation of the internal space of the slider 51, the locking member 53 is extended forward and backward, and the rear ends of the locking members 53 in the two sliders 51 are extended in arcs in opposite directions to form the meshing portion 531. The gear 56 is arranged between the locking member 53 and the sliding rack 112. A plurality of meshing teeth 532 matched with the gear 56 are provided on the side of the meshing portion 531 close to the gear 56. The front ends of the locking members 53 in the two sliders 51 are respectively extended in arcs in opposite directions to form a U-shaped linkage portion 533. The inner end portion of the limit member 55 is inserted in the linkage portion 533 and is penetrated by a rotating shaft 551 rotatably connected to the linkage portion 533. Therefore, by setting the arc-shaped extending meshing portion 531 and the linkage portion 533, the meshing portion 531 is engaged and locked by swinging back and forth instead of swinging left and right, thereby increasing the swinging and locking stroke of the meshing portion 531, thereby expanding the upward and downward swinging stroke of the linkage portion 533 as the limiting member 55 extends outward, thereby increasing the extending length of the limiting member 55, thereby increasing the limiting strength of the limiting member 55 on the movable arm 3.

[0036] Specifically, the slider 51 is hollow and has an opening in the middle of the bottom. A first shaft 511 and a second shaft 512 are horizontally arranged in the slider 51. The gear 56 is rotatably sleeved on the first shaft 511 and the lower end passes through the opening in the middle of the bottom of the slider 51 to engage with the sliding rack 112. The locking member 53 is rotatably sleeved on the second shaft 512.

[0037] In order to stably drive the limiter 55 to extend or retract in the limited internal space of the slider 51, the outer end of the limiter 55 penetrates the side wall of the slider 51, and the telescopic driving device 54 includes an electromagnet 541 and a spring 542 arranged between the electromagnet 541 and the inner end of the limiter 55. The electromagnet 541 is a device that generates electromagnetic when powered. A conductive winding matching its power is wound on the outside of the iron core. This coil with current flowing through it has magnetism like a magnet. A magnetic attraction portion 552 made of magnetic material is provided on the side of the inner end of the limiter 55 close to the spring 542. For example, the side of the inner end of the limiter 55 close to the spring 542 can be made of iron material. When the electromagnet 541 is powered off, the limiter 55 is pushed outward and extended to the outside of the slider 51 by the elastic force of the spring 542. When the electromagnet 541 is powered on, the limiter 55 is magnetically attracted and retracted into the slider 51.

[0038] Specifically, in this embodiment, the slide groove 111 is provided at the front of the fork 11, and the two sides of one end of the slider 51 close to the slide rack 112 extend oppositely to form a sliding portion 513, and the two sides of the bottom of the slide groove 111 are oppositely recessed to fit the sliding portion 513. In other embodiments, the slider 51 and the slide groove 111 can also be slidably arranged in other existing ways.

[0039] Specifically, the sensing device is configured as a pressure sensor, which is a device or apparatus that can sense pressure signals and convert pressure signals into usable output electrical signals according to a certain rule. In other embodiments, the sensing device can also be configured as other types of sensors, such as an induction switch, etc. The clamping drive device 4 is configured as a telescopic cylinder having a fixed end rotatably connected to the middle of the mounting frame 1 and a telescopic end rotatably connected to the rear end of the clamping arm 2, thereby stably driving the clamping arm 2 to swing up and down through the telescopic cylinder.

[0040] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steel pipe clamping mechanism, characterized in that: include: A mounting frame (1) is mounted on a corresponding forklift and is provided with two forks (11) extending forward on the front side, and slide grooves (111) are respectively provided on opposite sides of the two forks (11); A clamping arm (2), one side of which is rotatably arranged at the upper end of the mounting frame (1), and the other side of which is extended forward and rotatably arranged with a movable arm (3), a limit baffle (21) is arranged at the front of the other side of the clamping arm (2), the limit baffle (21) is arranged at the front side of the upper end of the movable arm (3), and a sensing device is arranged at the front side of the movable arm (3); A clamping drive device (4), which is arranged on the mounting frame (1) and is used to drive the clamping arm (2) to swing up and down; The limiting device (5) comprises two sliding blocks (51) respectively slidably arranged in the two sliding grooves (111), a driven rod (52) connecting the two sliding blocks (51), and a locking member (53) for locking the sliding blocks (51); the sliding blocks (51) are provided with a limiting member (55) driven by a telescopic driving device (54) to extend outward or retract inward; the clamping driving device (4) drives the clamping arm (2) to drive the movable arm (3) to swing down to between the two forks (11) and push the driven rod (52) to drive the two sliding blocks (51) to slide until the sensing device senses the corresponding goods on the forks (11), and then the locking member (53) locks the sliding blocks (51), and the telescopic driving device (54) drives the limiting member (55) to extend outward to the lower rear side of the movable arm (3).

2. A steel pipe clamping mechanism as claimed in claim 1, characterized in that: A sliding rack (112) is provided at the bottom of the sliding groove (111); the slider (51) includes a gear (56) rotatably arranged and meshing with the sliding rack (112); the locking member (53) is rotatably arranged in the slider (51) and one end is linked to the limiting member (55); the other end of the locking member (53) is provided as a meshing portion (531) adapted to the gear (56); after the telescopic driving device (54) drives the limiting member (55) to extend outward, one end of the locking member (53) is linked to swing and drives the meshing portion (531) to swing to mesh and lock the gear (56).

3. A steel pipe clamping mechanism as claimed in claim 2, characterized in that: The locking member (53) is extended forward and backward, and the rear ends of the locking members (53) in the two sliders (51) extend in arcs in opposite directions to form the meshing portion (531). The gear (56) is arranged between the locking member (53) and the sliding rack (112). A plurality of meshing teeth (532) matching the gear (56) are arranged on one side of the meshing portion (531) close to the gear (56). The front ends of the locking members (53) in the two sliders (51) extend in arcs in opposite directions to form a U-shaped linkage portion (533). The inner end of the limiting member (55) is inserted into the linkage portion (533) and penetrates a rotating shaft (551) rotatably connected to the linkage portion (533).

4. A steel pipe clamping mechanism as claimed in claim 2, characterized in that: The slider (51) is hollow and has an opening in the middle of the bottom. A first shaft (511) and a second shaft (512) are transversely arranged in the slider (51). The gear (56) is rotatably sleeved on the first shaft (511) and its lower end passes through the opening in the middle of the bottom of the slider (51) to mesh with the sliding rack (112). The locking member (53) is rotatably sleeved on the second shaft (512).

5. A steel pipe clamping mechanism as claimed in claim 1, characterized in that: The outer end of the limiting member (55) penetrates through the side wall of the sliding block (51); the telescopic driving device (54) comprises an electromagnet (541) and a spring (542) arranged between the electromagnet (541) and the inner end of the limiting member (55); a magnetic attraction portion (552) made of magnetic material is provided on a side of the inner end of the limiting member (55) close to the spring (542); when the electromagnet (541) is powered off, the limiting member (55) is pushed outward by the elastic force of the spring (542) to extend outside the sliding block (51); when the electromagnet (541) is powered on, the limiting member (55) is magnetically attracted and retracted into the sliding block (51).

6. A steel pipe clamping mechanism as claimed in claim 2, characterized in that: The slide groove (111) is arranged at the front part of the fork (11), and the sliding block (51) extends oppositely at two sides of one end close to the sliding rack (112) to form a sliding portion (513), and opposite depressions are arranged on two sides of the bottom of the slide groove (111) to match the sliding portion (513).

7. A steel pipe clamping mechanism as claimed in claim 1, characterized in that: The sensing device is configured as a pressure sensor, and the clamping drive device (4) is configured as a telescopic oil cylinder having a fixed end rotatably connected to the middle of the mounting frame (1) and a telescopic end rotatably connected to the rear end of the clamping arm (2).

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