Double self-locking clamping device and clamping method for clamping vehicle transporter

Abstract

The present invention discloses a double self-locking clamping device for a clamping vehicle carrier and a clamping method thereof. The double self-locking clamping device is composed of two identical clamping arm modules arranged symmetrically and acting synchronously to complete the double self-locking clamping of an object. Each clamping arm module includes two symmetrically arranged upper and lower base plates and two double self-locking clamping mechanisms symmetrically installed between the upper and lower base plates. The two base plates are fixed together by bolts. The double self-locking clamping mechanism includes an electric slide structure installed on the lower base plate, a four-rod limiting structure, a spring cylindrical locking structure and a clamping arm. The electric slide structure drives the expansion and retraction of the clamping arm through the cooperation of the four-rod limiting structure and the spring cylindrical locking structure and realizes double self-locking when the clamping arm is expanded. The present invention utilizes the combination of the four-rod limiting structure and the spring cylindrical locking structure to realize double self-locking when the clamping arm is expanded, so that the contact area between the force-bearing parts is increased, the force distribution is more reasonable and uniform, and the reliability of the clamping type carrier clamping the tire is ensured.

Description

Technical Field

[0001] The invention relates to a component of a vehicle carrier, and in particular to a double self-locking clamping device for a clamping type vehicle carrier and a clamping method thereof. Background Art

[0002] The clamping device of the existing clamping vehicle transporter is mainly composed of worm gear, hydraulic or cam mechanisms. However, the worm gear mechanism (such as CN204457020U, CN106703490A) and cam mechanism (such as CN206346543U) are subject to greater stress on the gear teeth when locked, and the mechanism is easily damaged. The hydraulic mechanism (such as CN203008460U) is prone to leakage after long-term work and is unreliable. Summary of the invention

[0003] In order to solve the defects and shortcomings in the above-mentioned prior art, the present invention provides a double self-locking clamping device and a clamping method for a clamping type vehicle carrier, which utilizes the "dead point" self-locking of a four-rod limiting structure in combination with the self-locking of a locking cylinder to increase the contact area between the force-bearing parts and make the force distribution more reasonable and uniform, thereby ensuring the reliability of the clamping type carrier in clamping the tire.

[0004] The technical solution of the present invention is as follows: a double self-locking clamping device for a clamping vehicle carrier, which is composed of two identical clamping arm modules symmetrically arranged and acting synchronously to complete the double self-locking clamping of the object. Each clamping arm module includes two symmetrically arranged upper and lower base plates and two double self-locking clamping mechanisms symmetrically installed between the upper and lower base plates. The two base plates are fixed together by bolts. The double self-locking clamping mechanism includes an electric slide structure installed on the lower base plate, a four-rod limiting structure, a spring cylindrical locking structure, and a clamping arm that cooperates with the four-rod limiting structure and the spring cylindrical locking structure. The electric slide structure drives the expansion and retraction of the clamping arm through the cooperation of the four-rod limiting structure and the spring cylindrical locking structure and realizes double self-locking when the clamping arm is expanded.

[0005] The present invention utilizes the "dead point" self-locking of the four-rod limiting structure in combination with the locking cylinder self-locking to achieve double self-locking when the clamp arm is unfolded, which not only ensures the stability and reliability of the clamp arm when it is unfolded, but also increases the contact area between the force-bearing parts and makes the force distribution more reasonable and uniform, thereby ensuring the reliability of the clamping transporter in clamping the tire.

[0006] Preferably, the four-rod limiting structure comprises a first connecting rod, a connecting rod, a fixing rod and a second connecting rod;

[0007] The spring cylindrical locking structure comprises a locking cylinder, a return spring, a push spring, a limit block and a slider;

[0008] The electric slide structure includes a motor, a reducer, a slider 1, a lead screw, a slide and a slider 2;

[0009] The clamping arm is rotatably connected to the lower base plate via a rotating shaft;

[0010] The motor, reducer and slide are fixed together by bolts and fixed to the lower base plate by bolts.

[0011] The slider 1 is pushed by the lead screw to move on the slide table, the slider 2 is slidably connected inside the slider 1, the slider 2 is hinged to one end of the connecting rod 1 by a bolt, the other end of the connecting rod 1, one end of the connecting rod, and one end of the connecting rod 2 are hinged together by a pin shaft, the other end of the connecting rod is fixed to the lower bottom plate by a fixing rod, and the other end of the connecting rod 2 is hinged to the clamp arm by a pin shaft;

[0012] Slider three slides on the slide table under the joint action of slider one and a return spring. The return spring is sleeved on the lead screw and fixedly connected to slider three. Two push springs are symmetrically fixed on slider three. The push spring and the return spring are fixed on the same side of slider three. The end of the push spring is fixedly connected to the locking cylinder.

[0013] This structure ensures that its various components are compact and reliable, the connections are firm and reliable, and the interactions are smooth and reliable.

[0014] Preferably, a limit column is installed at the movement limit position of the connecting rod to prevent the four-rod limit structure from moving too far, so as to ensure locking reliability.

[0015] This structure ensures the movement stability and reliability of the four-rod limiting structure, thereby further ensuring that the four-rod limiting structure drives and locks the clamping arm more stably and reliably.

[0016] Preferably, when the clamp arm is extended to a certain position, the forces of the second connecting rod and the connecting rod are in a straight line, forming a two-force rod, which is in a "dead point" position to achieve self-locking.

[0017] This kind of four-rod limiting structure makes the locking of the clamp arm more stable and reliable.

[0018] Preferably, a hole is opened on the cylindrical surface of the clamp arm, and under the action of the push spring, a part of the locking cylinder is in the hole of the slide table, and the other part is in the hole of the cylindrical surface of the clamp arm.

[0019] This structure ensures that the spring cylindrical locking structure locks the clamp arm more firmly and reliably.

[0020] A clamping method for a double self-locking clamping device for a clamping vehicle carrier,

[0021] In the initial state, all clamp arms are in a retracted state. When clamping is required, the four double self-locking clamping mechanisms are activated at the same time, the motor is energized, and the slider one slides on the slide table under the push of the lead screw. The slider two is pushed by the slider one, and the connecting rod one hinged on the slider two moves together. When the slider one moves to the slider three, it will push the slider three to move to the limit block together. In this process, the reset spring is continuously compressed, and the push spring pushes the locking cylinder out to the cylindrical surface of the clamp arm under the push of the slider three. When the slider two reaches the required position, the clamp arm is fully extended. At this time, the forces of the connecting rod two and the connecting rod constitute two force rods, and the four-rod limiting structure is in the "dead point" position, which constitutes self-locking. At the same time, a part of the locking cylinder pressing on the cylindrical surface of the clamp arm enters the hole opened by the clamp arm, and a part is in the slide table hole, thereby realizing another locking of the clamp arm. The two locking structures constitute double self-locking.

[0022] When the clamping device is retracted, the four double self-locking clamping mechanisms operate simultaneously, and the slider one makes a return motion on the slide table under the action of the lead screw, so that the slider three drives the push springs and the locking cylinder on both sides to move out of the clamp arm hole under the action of the reset spring. In this process, the slider two is stationary relative to the slide table under the action of the four-rod limiting structure, and the slider two slides relative to the slider one for a certain distance. When the slider one moves to contact with the slider two, the slider two acts on the four-rod limiting structure through the connecting rod one under the push of the slider one, so that the clamp arm is retracted.

[0023] The present invention utilizes the "dead point" self-locking of the four-rod limiting structure in combination with the locking cylinder self-locking to achieve double self-locking when the clamp arm is unfolded, which not only ensures the stability and reliability of the clamp arm when it is unfolded, but also increases the contact area between the force-bearing parts and makes the force distribution more reasonable and uniform, thereby ensuring the reliability of the clamping transporter in clamping the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the double self-locking clamping mechanism in the present invention;

[0025] Figure 2 It is a structural schematic diagram of the four-rod limiting structure in the present invention;

[0026] Figure 3 It is a structural schematic diagram of the spring cylindrical locking structure in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the double self-locking clamping mechanism of the present invention when the clamping arms are folded;

[0028] Figure 5 It is a schematic diagram of the structure of the double self-locking clamping mechanism of the present invention when the clamping arms are unfolded and locked;

[0029] Figure 6 It is a schematic diagram of the structure of the double self-locking clamping mechanism of the present invention when the locking cylinder is retracted;

[0030] Figure 7 It is a structural schematic diagram of the clamping arms of the double self-locking clamping mechanism of the present invention during the folding process;

[0031] Figure 8 and Fig. 9 It is a structural schematic diagram of the present invention applied to a vehicle carrier;

[0032] In the figure, 1. electric slide structure, 2. four-rod limiting structure, 3. spring cylinder locking structure, 4. clamping arm, 5. lower base plate, 6. rotating shaft, 11. motor, 12. reducer, 13. slider one, 14. screw, 15. slide, 16. slider two, 21. connecting rod one, 22. connecting rod, 23. fixing rod, 24. limiting column, 25. connecting rod two, 31. locking cylinder, 32. reset spring, 33. push spring, 34. limiting block, 35. slider three 35. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings, but this does not limit the protection scope of the present invention.

[0034] like Figure 1-5As shown, a new type of double self-locking clamping device for clamping vehicle transporters is shown. The clamping device is composed of two identical clamping arm modules symmetrically arranged, which act synchronously to complete the double self-locking clamping of the object. Each clamping arm module includes a base plate assembly, and the base plate is symmetrically arranged by an upper and lower base plates. The two base plates can be fixed together by bolts, and two mutually symmetrical double self-locking clamping mechanisms are fixedly installed between the two base plates. Each double self-locking clamping mechanism includes an electric slide structure 1 installed on the lower base plate 5, a four-rod limiting structure 2, a spring cylindrical locking structure 3, and a clamping arm 4 that cooperates with the four-rod limiting structure 2 and the spring cylindrical locking structure 3. The electric slide structure 1 drives the expansion and retraction of the clamping arm 4 through the cooperation of the four-rod limiting structure 2 and the spring cylindrical locking structure 3, and realizes double self-locking when the clamping arm 4 is expanded. The electric slide structure 1 includes a motor 11, a reducer 12, a slider 13, a lead screw 14, a slide 15 and a slider 2 16; the four-bar limit structure 2 includes a connecting rod 1 21, a connecting rod 22, a fixing rod 23 and a connecting rod 25; the spring cylinder locking structure 3 includes a locking cylinder 31, a reset spring 32, a push spring 33, a limit block 34 and a slider 35; wherein the motor 11, the reducer 12 and the slide 15 are fixed together by bolts and fixed at the bottom by bolts. On the bottom plate 5, the slider 13 is pushed by the lead screw 14 to move on the slide, and the slider 2 16 can slide freely in the slider 1 13 for a certain distance. The slider 2 16 is hinged with the connecting rod 1 21 by bolts, and the connecting rod 1 21, the connecting rod 22, and the connecting rod 25 are hinged together by a pin shaft. The other end of the connecting rod 22 is fixed to the lower bottom plate 5 by a fixed rod 23, and the connecting rod 25 is hinged with the clamp arm 4 by a pin shaft. The clamp arm 4 is rotatably connected to the lower bottom plate 5 through the rotating shaft 6. When the clamp arm 4 is extended to a certain position, the forces of the connecting rod 25 and the connecting rod 22 are in a straight line, forming a two-force rod to achieve self-locking. In order to prevent the four-bar limit structure from moving too far, a limit column 24 is installed at the movement limit position of the connecting rod 22 to ensure the locking reliability. The slider 1 13 and the slider 3 35 slide on the slide rail, and the sliding of the slider 3 35 is achieved under the joint action of the slider 1 13 and the reset spring 32. The return spring 32 is sleeved in the screw 14 and fixedly connected to the slider three 35. The push spring 33 is symmetrically fixed on the slider three 35. The push spring 33 and the return spring 32 are fixed on the same side of the slider three 35. The end of the push spring 33 is fixedly connected to the locking cylinder 31. A hole is opened on the cylindrical surface of the clamping arm 4. Under the action of the push spring 33, a part of the locking cylinder 31 is in the hole of the slide 35, and the other part is in the hole of the cylindrical surface of the clamping arm 4. In this way, the rotation of the clamping arm 4 around the rotating shaft 6 is restricted and locked.

[0035] A clamping method for a double self-locking clamping device for a clamping vehicle carrier, in which all clamp arms are in a retracted state (such as Figure 8As shown in the figure, when the motor 11 is powered on, the slider 13 slides on the slide 15 under the push of the lead screw 14, and the slider 2 16 is pushed by the lower side of the slider 13, and the connecting rod 1 21 hinged on the slider 2 16 moves together. When the top of the slider 13 moves to the slider 3 35, it pushes the slider 3 35 to move to the limit block 34. In this process, the reset spring 32 is continuously compressed, and the push spring 33 is pushed out of the locking cylinder under the push of the slider 3 35. 31 to the cylindrical surface of the clamp arm 4, when the slider 16 reaches the desired position, the forces of the connecting rod 25 and the connecting rod 22 constitute two force rods, and the four-rod limiting structure is in the "dead point" position, which constitutes self-locking. At the same time, a part of the locking cylinder 31 on the cylindrical surface of the clamp arm 4 enters the hole opened by the clamp arm 4, so that a part of the locking cylinder is in the hole of the clamp arm 4, and a part of it is in the hole of the slide 15, realizing another locking of the clamp arm 4, and the two locking devices constitute double self-locking (such as Fig. 9 as shown).

[0036] When the clamping device is retracted, the slider 13 moves back on the slide 15 under the action of the lead screw 14, so that the slider 35 drives the push springs 33 and the locking cylinder 31 on both sides to move out of the hole of the clamp arm under the action of the return spring 32 (such as Figure 6 As shown in FIG. 1 ), during this process, the slider 2 16 is stationary relative to the slide table 15 under the action of the four-bar limiting structure, and the slider 2 16 only slides relative to the slider 1 13 for a certain distance. When the inner upper side of the slider 1 13 moves to contact with the slider 2 16 (as shown in FIG. 1 ), the slider 2 16 is moved relative to the slide table 15. Figure 7 As shown in the figure), the slider 2 16 is pushed by the inner upper side of the slider 1 13 and acts on the four-bar limiting structure through the connecting rod 1 21 to retract the clamp arm 4.

Claims

1. A double self-locking clamping device for a clamping vehicle carrier, characterized in that: It consists of two identical clamping arm modules arranged symmetrically and acting synchronously to complete double self-locking clamping of the object. Each clamping arm module includes two symmetrically arranged upper and lower base plates and two double self-locking clamping mechanisms symmetrically installed between the upper and lower base plates. The two base plates are fixed together by bolts. The double self-locking clamping mechanism includes an electric slide structure installed on the lower base plate, a four-rod limiting structure, a spring cylindrical locking structure, and a clamping arm that cooperates with the four-rod limiting structure and the spring cylindrical locking structure. The electric slide structure drives the expansion and retraction of the clamping arm through the cooperation of the four-rod limiting structure and the spring cylindrical locking structure and realizes double self-locking when the clamping arm is expanded. The four-rod limiting structure comprises a first connecting rod, a connecting rod, a fixing rod and a second connecting rod; The spring cylindrical locking structure comprises a locking cylinder, a return spring, a push spring, a limit block and a slider; The electric slide structure includes a motor, a reducer, a slider 1, a lead screw, a slide and a slider 2; The clamping arm is rotatably connected to the lower base plate via a rotating shaft; The motor, reducer and slide are fixed together by bolts and fixed to the lower base plate by bolts. The slider 1 is pushed by the lead screw to move on the slide table, the slider 2 is slidably connected inside the slider 1, the slider 2 is hinged to one end of the connecting rod 1 by a bolt, the other end of the connecting rod 1, one end of the connecting rod and one end of the connecting rod 2 are hinged together by a pin shaft, the other end of the connecting rod is fixed to the lower bottom plate by a fixing rod, and the other end of the connecting rod 2 is hinged to the clamp arm by a pin shaft; The slider three slides on the slide table under the joint action of the slider one and the return spring. The return spring is sleeved on the lead screw and fixedly connected to the slider three. Two push springs are symmetrically fixed on the slider three. The push spring and the return spring are fixed on the same side of the slider three. The end of the push spring is fixedly connected to the locking cylinder. A limit column is installed at the movement limit position of the connecting rod to prevent the four-rod limit structure from moving too far, so as to ensure the locking reliability; When the clamp arm is extended to a certain position, the forces of the second connecting rod and the connecting rod are in a straight line, forming a two-force rod, which is in the "dead point" position to achieve self-locking.

2. A double self-locking clamping device for a clamping vehicle carrier according to claim 1, characterized in that: A hole is opened on the cylindrical surface of the clamp arm. Under the action of the push spring, a part of the locking cylinder is in the hole of the slide table, and the other part is in the hole on the cylindrical surface of the clamp arm.

3. A clamping method for a double self-locking clamping device for a clamping type vehicle carrier as claimed in claim 1, characterized in that: In the initial state, all clamp arms are in a retracted state. When clamping is required, four double self-locking clamping mechanisms are activated at the same time, the motor is energized, and the slider one slides on the slide table under the push of the lead screw. The slider two is pushed by the slider one, and the connecting rod one hinged on the slider two moves together. When the slider one moves to the slider three, it will push the slider three to move to the limit block together. In this process, the reset spring is continuously compressed, and the push spring pushes the locking cylinder to the cylindrical surface of the clamp arm under the push of the slider three. When the slider two reaches the required position, the clamp arm is fully extended. At this time, the forces of the connecting rod two and the connecting rod constitute two force rods, and the four-rod limiting structure is in the "dead point" position, which constitutes self-locking. At the same time, a part of the locking cylinder that presses against the cylindrical surface of the clamp arm enters the hole opened by the clamp arm, and a part is in the slide table hole, realizing another locking of the clamp arm. The two locking structures constitute double self-locking. When the clamping device is retracted, the four double self-locking clamping mechanisms operate simultaneously, and the slider one makes a return motion on the slide table under the action of the lead screw, so that the slider three drives the push springs and the locking cylinder on both sides to move out of the clamp arm hole under the action of the reset spring. In this process, the slider two is stationary relative to the slide table under the action of the four-rod limiting structure, and the slider two slides relative to the slider one for a certain distance. When the slider one moves to contact with the slider two, the slider two acts on the four-rod limiting structure through the connecting rod one under the push of the slider one, so that the clamp arm is retracted.

Images