Active and passive combined clamp suitable for hollow concrete guardrail

Abstract

The invention relates to the technical field of clamps, in particular to an active and passive combined clamp suitable for a hollow concrete guardrail, which comprises a clamp base, a passive clamp and an active clamp, the active clamp comprises a movable hanger, a connecting plate and a linear driver; the passive clamp comprises a fixed arm, a movable arm and two sets of cross arms, the fixed arm is fixedly connected to the clamp base, the movable arm is parallel to the fixed arm, the two sets of cross arms are rotationally arranged at the two ends of the movable arm respectively, each set of cross arms comprises two clamping arms which are rotationally connected, and connecting rods are hinged to the upper ends of the two clamping arms respectively. The upper ends of the two connecting rods are hinged to the fixed arm. The design that the active clamp and the passive clamp are combined is adopted, once the guardrail slides down, the guardrail makes contact with the active clamp firstly, the guardrail is effectively prevented from further sliding down by means of the blocking and supporting effects of the active clamp, and reliable safety protection guarantee is provided for the whole operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of clamps, and more specifically to an active and passive combined clamp suitable for hollow concrete guardrails. Background Art

[0002] At present, the installation of highway guardrails is particularly important for vehicle driving. Highway guardrails are a kind of hollow guardrails with a large mass. They are characterized by holes on both sides and in the middle of the top. They are a kind of strip-shaped protective energy-absorbing structure installed on the outside of the highway lane or the central dividing strip. They play a role in blocking, absorbing collision energy and guiding vehicles when they collide. During the processing, installation and maintenance of the guardrails, clamps are needed to clamp the guardrails to ensure the stability and accuracy of the operation. However, the existing clamps have problems such as complex operation and unstable clamping when clamping the guardrails, which affects work efficiency and safety.

[0003] Therefore, it is necessary to improve the prior art. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, an active and passive combining clamp suitable for hollow concrete guardrails is provided which is simple to operate and has high stability and accuracy.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: An active and passive combined clamp suitable for a hollow concrete guardrail, comprising a clamp base and a passive clamp and an active clamp arranged on the clamp base; The active clamp comprises a movable hanger, a connecting plate and a linear drive, wherein the linear drive and the movable hanger are both arranged on the clamp base, and the movable end of the linear drive is connected to the connecting plate and drives the movable hanger to rotate through the connecting plate; The passive clamp includes a fixed arm, a movable arm and two groups of cross arms. The fixed arm is fixedly connected to the clamp base, the movable arm is arranged parallel to the fixed arm, and the two groups of cross arms are rotatably arranged at both ends of the movable arm. Each group of cross arms includes two rotatably connected clamping arms, the upper ends of the two clamping arms are respectively hinged with connecting rods, and the upper ends of the two connecting rods are hinged to the fixed arm; the lower ends of the two clamping arms are provided with clamping plates, and a self-locking mechanism is provided between the fixed arm and the movable arm.

[0006] Preferably, the linear drive includes an oil cylinder, a connecting plate is fixedly arranged on the piston end of the oil cylinder, two movable hangers are provided, the middle parts of the two movable hangers are respectively hinged on the clamp base, a slide groove is provided on the side where the two movable hangers are close to each other, and an intermediate top shaft is provided on the connecting plate, and the intermediate top shaft passes through the slide grooves of the two movable hangers.

[0007] Preferably, the piston end of the oil cylinder is provided with an external thread, and the top of the connecting plate is provided with a threaded hole matching the external thread.

[0008] Preferably, the self-locking mechanism comprises a self-locking structure shell, a column body and a base platform, the self-locking structure shell is fixedly connected to the fixed arm, the base platform is fixedly connected to the movable arm, the column body is slidably arranged in the self-locking structure shell, an annular channel is arranged on the outer side of the column body, inclined grooves are staggered at the upper and lower ends of the annular channel, and an arm extension rod extending into the annular channel is fixedly arranged on the self-locking structure shell; The lower end of the column body is fixedly connected with a gravity unlocking block, and a lock hole cooperating with the gravity unlocking block is arranged on the base platform.

[0009] Preferably, a flange is fixedly connected to the upper end of the clamp base.

[0010] Preferably, the clamping plate and the working surface of the movable crane are both provided with rubber material.

[0011] Preferably, the clamping plate is hinged to the lower end of the corresponding clamping arm.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adopts a design that combines active and passive clamps. Once the guardrail starts to slide down, it will first contact the active clamp that has penetrated into the center hole of the guardrail. With the blocking and supporting effect of the active clamp, the guardrail can be effectively prevented from sliding further, providing reliable safety protection for the entire operation process.

[0013] 2. The present invention is provided with a self-locking mechanism, which can achieve locking and unlocking by lowering or rising the clamp as a whole, thereby reducing manual participation and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 A schematic diagram of a three-dimensional structure of the present invention from one angle; Figure 3 It is a schematic diagram of the working state of the active clamp during operation of the present invention; Figure 4 It is a side view structural schematic diagram of the present invention; Figure 5 It is a structural schematic diagram of the active clamp of the present invention; Figure 6 It is a schematic diagram of the locked state of the self-locking structure of the present invention; Figure 7 This is a schematic diagram of the unlocking state of the self-locking structure of the device; Figure 8This is a schematic diagram of the main structure of the column of this device.

[0016] In the figure: 1- fixture base, 11- flange, 2- passive fixture, 21- fixed arm, 22- movable arm, 23- cross arm, 24- connecting rod, 25- clamping plate, 3- active fixture, 31- movable hanger, 32- connecting plate, 33- linear drive, 35- slide groove, 36- intermediate top shaft, 4- self-locking mechanism, 41- self-locking structure shell, 42- base platform, 43- column body, 44- annular channel, 45- inclined groove, 46- gravity unlocking block, 47- extension arm rod, 48- top disc, 5- rubber material. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example: like Figures 1 to 8 As shown, an active and passive combined clamp suitable for hollow concrete guardrails includes a clamp base 1 and a passive clamp 2 and an active clamp 3 arranged on the clamp base 1. A flange 11 is fixedly connected to the upper end of the clamp base 1, and a threaded hole for connecting with the working device of the whole vehicle is arranged on the flange 11.

[0019] The passive clamp 2 includes a fixed arm 21, a movable arm 22 and two groups of cross arms 23. The fixed arm 21 is fixedly connected to the clamp base 1, and the movable arm 22 is arranged parallel to the fixed arm 21. Preferably, two fixed arms 21 are provided and fixedly connected to both sides of the clamp base 1, respectively, and the movable arm 22 is slidably arranged on the clamp base 1. The two groups of cross arms 23 are rotatably arranged at both ends of the movable arm 22, and each group of cross arms 23 includes two rotatably connected clamping arms, and the upper ends of the two clamping arms are respectively hinged with connecting rods 24, and the upper ends of the two connecting rods 24 are hinged with the fixed arm 21; the lower ends of the two clamping arms are hinged with clamping plates 25, and the two sides of the hollow concrete guardrail are clamped by the two clamping plates 25.

[0020] A self-locking mechanism 4 is provided between the fixed arm 21 and the movable arm 22, and the self-locking mechanism 4 is used to keep the passive clamp 2 in an open state; when the passive clamp 2 clamps the guardrail, the self-locking mechanism 4 can be automatically unlocked to allow the clamping plates 25 to approach each other to clamp the guardrail.

[0021] The self-locking mechanism 4 includes a self-locking structure housing 41, a column body 43 and a base platform 42. The self-locking structure housing 41 is fixedly connected to the fixed arm 21 through a top disk 48 fixedly connected to the upper end thereof, and the base platform 42 is fixedly connected to the movable arm 22. The column body 43 is slidably arranged in the self-locking structure housing 41, and a gravity unlocking block 46 is fixedly connected to the lower end of the column body 43. A lock hole that cooperates with the gravity unlocking block 46 is arranged on the base platform 42. When the gravity unlocking block 46 is inserted into the lock hole of the base platform 4, the locked and unlocked states can be switched by rotating the gravity unlocking block 46 by a certain angle.

[0022] Preferably, an annular channel 44 is provided on the outer side of the column body 43, and inclined grooves 45 are staggered at the upper and lower ends of the annular channel 44. An arm rod 47 extending into the annular channel 44 is fixedly provided on the self-locking structure housing 41. When the column body 43 moves upward, the annular channel 44 is driven to move upward, and the arm rod 47 contacts the inclined groove 45 at the lower end of the annular channel 44 and rotates a certain angle under the guidance of the lower inclined groove 45; when the column body 43 moves downward, the annular channel 44 is driven to move downward, and the arm rod 47 contacts the inclined groove 45 at the upper end of the annular channel 44 and continues to rotate a certain angle under the guidance of the upper inclined groove 45. Preferably, the two rotation angles are 90° in total. When the gravity unlocking block 46 rotates 90° following the positioning rod 43, it switches to a locked or unlocked state with the lock hole.

[0023] The active clamp 3 includes a movable hanger 31, a connecting plate 32 and a linear drive 33. The linear drive 33 and the movable hanger 31 are both arranged on the clamp base 1. Preferably, the linear drive 33 adopts a cylinder, and the connecting plate 32 is fixedly arranged on the piston end of the cylinder. There are two movable hangers 31, and the middle parts of the two movable hangers 31 are respectively hinged on the clamp base 1. The two movable hangers 31 are each provided with a slide groove 35 on the side close to each other, and an intermediate top shaft 36 is provided on the connecting plate 32. The intermediate top shaft 36 passes through the slide grooves 35 of the two movable hangers 31.

[0024] When the oil cylinder is extended and retracted, the two movable hangers 31 are pushed and rotated through the middle top shaft 36 to achieve the positioning of the middle hole of the hollow concrete guardrail.

[0025] Preferably, the piston end of the oil cylinder is provided with an external thread, and the top of the connecting plate 32 is provided with a threaded hole matched with the external thread. The working surfaces of the clamping plate 25 and the movable hanger 31 are both provided with rubber material 5.

[0026] Working principle: At the initial stage of the operation, the self-locking mechanism 4 is in a locked state, the two clamping plates 25 are opened, and the clamp is lowered as a whole under the drive of the vehicle working device, so that the movable hanger 31 at the lower end of the active clamp 3 is accurately positioned and inserted into the center hole of the guardrail. At the same time, the passive clamp 2 is symmetrically distributed on both sides of the guardrail and is in a ready state.

[0027] As the operation progresses, the active clamp 3 continues to penetrate along the axis of the center hole. During this process, the movable hangers 31 on both sides are driven to open outward synchronously to adapt to the working space requirements. The passive clamp gradually approaches the surface of the guardrail. After being squeezed by the guardrail, the distance between the movable arm 22 and the fixed arm 21 decreases, causing the column body 43 to move upward relative to the self-locking structure shell 41. The arm rod 47 is driven by the inclined groove 45 to rotate 90°, realizing the unlocking of the gravity unlocking block 46 and the base platform 42. At this time, the passive clamp 2 officially enters the working state, and the attachment immediately stops extending and starts to lift upward as a whole. Under the action of gravity, the two clamping plates 25 clamp the side walls of the guardrail.

[0028] During the entire clamping operation, once the guardrail starts to slide down, it will first contact the active clamp 3 that has penetrated into the center hole of the guardrail. With the blocking and supporting effect of the active clamp 3, the guardrail can be effectively prevented from sliding further, providing reliable safety protection for the entire operation process.

[0029] Only the preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention, and various changes should be included in the protection scope of the present invention.

Claims

1. An active and passive combination clamp suitable for hollow concrete guardrails, characterized by: It comprises a fixture base (1), and a passive fixture (2) and an active fixture (3) arranged on the fixture base (1); The active clamp (3) comprises a movable hanger (31), a connecting plate (32) and a linear drive (33), wherein the linear drive (33) and the movable hanger (31) are both arranged on the clamp base (1), and the movable end of the linear drive (33) is connected to the connecting plate (32) and drives the movable hanger (31) to rotate via the connecting plate (32); The passive clamp (2) comprises a fixed arm (21), a movable arm (22) and two groups of cross arms (23); the fixed arm (21) is fixedly connected to the clamp base (1); the movable arm (22) is arranged parallel to the fixed arm (21); the two groups of cross arms (23) are rotatably arranged at two ends of the movable arm (22); each group of cross arms (23) comprises two rotatably connected clamping arms; the upper ends of the two clamping arms are respectively hinged with connecting rods (24); the upper ends of the two connecting rods (24) are hinged with the fixed arm (21); the lower ends of the two clamping arms are each provided with a clamping plate (25); and a self-locking mechanism (4) is provided between the fixed arm (21) and the movable arm (22).

2. The active and passive combination clamp suitable for hollow concrete guardrail according to claim 1, characterized in that: The linear drive (33) comprises an oil cylinder, a connecting plate (32) fixedly arranged at the piston end of the oil cylinder, two movable hangers (31) are provided, the middle parts of the two movable hangers (31) are respectively hinged on the fixture base (1), a slide groove (35) is provided on the side of the two movable hangers (31) close to each other, and an intermediate top shaft (36) is provided on the connecting plate (32), and the intermediate top shaft (36) passes through the slide grooves (35) of the two movable hangers (31).

3. The active and passive combination clamp suitable for hollow concrete guardrail according to claim 2, characterized in that: The piston end of the oil cylinder is provided with an external thread, and the top of the connecting plate (32) is provided with a threaded hole matching the external thread.

4. The active and passive combination clamp for hollow concrete guardrail according to claim 1, characterized in that: The self-locking mechanism (4) comprises a self-locking structure shell (41), a column body (43) and a base platform (42); the self-locking structure shell (41) is fixedly connected to the fixed arm (21); the base platform (42) is fixedly connected to the movable arm (22); the column body (43) is slidably arranged in the self-locking structure shell (41); an annular channel (44) is arranged on the outer side surface of the column body (43); inclined grooves (45) are staggered at the upper and lower ends of the annular channel (44); and an arm extension rod (47) extending into the annular channel (44) is fixedly arranged on the self-locking structure shell (41); A gravity unlocking block (46) is fixedly connected to the lower end of the column body (43), and a lock hole cooperating with the gravity unlocking block (46) is provided on the base platform (42).

5. The active and passive combination clamp suitable for hollow concrete guardrail according to claim 1, characterized in that: A flange (11) is fixedly connected to the upper end of the clamp base (1).

6. The active and passive combination clamp for hollow concrete guardrail according to claim 1, characterized in that: Rubber material (5) is provided on the working surfaces of the clamping plate (25) and the movable hanger (31).

7. The active and passive combination clamp for hollow concrete guardrail according to claim 1, characterized in that: The clamping plate (25) is hinged to the lower end of the corresponding clamping arm.

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