Hard connecting device for mining flat car

Abstract

The utility model discloses a hard connecting device for a mining flat car, a connecting rod comprises a sleeve rod and an inner rod which are coaxially arranged, and the outer end of the sleeve rod and the outer end of the inner rod are both rotationally connected with a connector; the two ends of a main spring arranged on the peripheral face of the sleeve rod in a sleeving mode are fixed to the sleeve rod. An auxiliary spring in the same direction as the length direction of the inner rod is arranged outside the inner rod, the outer end of the auxiliary spring is fixed to a connector connected with the inner rod, and the inner end of the auxiliary spring is fixedly connected with the inner end of the sleeve rod. According to the hard connection device, the sleeve rod and the inner rod are in hard connection, the hard connection strength of the whole device is guaranteed, the length of the sleeve rod is the main length of the whole device, the main spring arranged on the sleeve rod in a sleeving mode guarantees collision buffering of the whole device in the advancing direction, and when collision occurs, the auxiliary spring arranged outside the inner rod can immediately buffer most impact firstly, so that the whole device is prevented from being damaged. And the impact reaching the main spring is greatly reduced, and the influence on the front vehicle is obviously reduced, so that the buffering effect is better when the rear vehicle follows up, especially when the advancing route is nonlinear and deflection steering is needed.

Description

Technical Field

[0001] The utility model relates to coal mine operating equipment, in particular to a hard connection device of a flatbed truck for mining. Background Art

[0002] Mining flatbed trucks are often used in underground mines to transport equipment or other items along underground tunnels and surface industrial sites. The roads in the working environment are uneven, so they are suitable for small-tonnage transportation.

[0003] Due to the particularity of the working environment, the connection between flatbed trucks adopts a hard connection structure, which can greatly reduce the collision between the front and rear vehicles caused by bumps during towing, but it usually does not have a shock-absorbing structure. It is easy to cause damage to the vehicle body under long-term use. The frame placed directly on the flatbed truck is prone to deflection during use. Utility Model Content

[0004] Purpose of the utility model: The purpose of the utility model is to provide a hard connection device for a mining flatbed truck. By adding a shock-absorbing structure, the hard connection device is more suitable for the working environment of the mining flatbed truck.

[0005] Technical solution: A hard connection device for a mining flatbed truck, including a connecting head and a connecting rod, the connecting rod including a coaxially arranged sleeve rod and an inner rod, the outer ends of the sleeve rod and the inner rod are rotatably connected to one of the connecting heads; a main spring is sleeved on the outer circumference of the sleeve rod, and both ends of the main spring are fixed to the sleeve rod; an auxiliary spring is arranged on the outside of the inner rod in the same direction as the length direction of the inner rod, the outer end of the auxiliary spring is fixed to the connecting head connected to the inner rod, and the inner end of the auxiliary spring is connected and fixed to the inner end of the sleeve rod.

[0006] Furthermore, the inner end of the sleeve rod and the inner end of the inner rod are fixed by a fastening bolt, and the fastening bolt is transversely penetrated to connect the inner end of the sleeve rod and the inner end of the inner rod, and the inner end of the auxiliary spring is connected and fixed to the fastening bolt.

[0007] Furthermore, a track groove in the same direction as the length direction of the inner rod is opened on the inner end of the inner rod, and the fastening bolt is inserted into the track groove. While providing conditions for the design and assembly of the main and auxiliary springs, the overall length of the connecting rod can be changed by adjustment according to usage needs.

[0008] Furthermore, at least two auxiliary springs are evenly distributed around the inner rod to evenly buffer impacts.

[0009] Furthermore, the length of the sleeve rod is 3 to 5 times the length of the inner rod, and the length of the sleeve rod is the main length of the entire device. The main spring sleeved on the sleeve rod ensures the impact buffering of the entire device in the traveling direction.

[0010] Furthermore, according to the collision situation in the traveling direction under the working environment, the hard connection device is connected to the mining flatbed truck behind the traction traveling direction through the connecting head at the inner rod end, and is connected to the mining flatbed truck in front of the traction traveling direction through the connecting head at the sleeve rod end.

[0011] Furthermore, the outer ends of the sleeve rod and the inner rod are fixed to a ball joint, the diameter of the ball joint is larger than the diameter of the sleeve rod, an arcuate groove is provided at the inner end of the connecting head, the opening surface diameter of the arcuate groove is larger than the diameter of the ball joint, the ball joint is placed in the arcuate groove, a universal ring is provided between the ball joint and the arcuate groove, a split end plate is provided on the inner end surface of the connecting head to shield the opening surface of the arcuate groove, the opening diameter of the split end plate is larger than the diameter of the sleeve rod and smaller than the diameter of the ball joint; a connecting hole is provided at the outer end of the connecting head.

[0012] Beneficial effect: The advantages of the utility model are: the hard connection device of the present application, the connection between the sleeve rod and the inner rod is a hard connection, which ensures the hard connection strength of the device as a whole, the sleeve rod length is the main length of the device as a whole, the main spring sleeved on the sleeve rod ensures the impact buffering of the device as a whole in the direction of travel, when a collision occurs, the auxiliary spring arranged outside the inner rod can immediately buffer most of the impact, the impact reaching the main spring is greatly reduced, and the impact on the front vehicle is significantly reduced. From the perspective of the entire vehicle fleet, the impact is gradually reduced in sequence. When the rear vehicle follows, especially when the travel route is non-straight and deflection and steering are required, the auxiliary spring connected to the connector can adapt to such steering changes, and the buffering effect is better. The connection structure of the connecting rod and the connector makes assembly convenient and subsequent repairable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the front view of the utility model;

[0014] Figure 2 Schematic diagram of the inner rod structure;

[0015] Figure 3 This is a schematic diagram of the end face of the connection between the inner rod end and the connector;

[0016] Figure 4 This is a schematic diagram of the end face of the connection between the sleeve rod end and the connector;

[0017] Figure 5 for Figure 1 A zoomed in view of the Figure Ⅰ ;

[0018] Figure 6 for Figure 1 A zoomed in view of the Figure II . DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments.

[0020] A hard connection device for a mining flatbed truck, as shown in the attached Figure 1 As shown, it includes a connecting rod 2 and two connecting heads 1.

[0021] The connecting rod 2 includes a sleeve rod 21 and an inner rod 22. The sleeve rod is 3 to 5 times longer than the inner rod. The two are coaxially arranged. The sleeve rod 21 is sleeved outside the inner rod 22. The two are connected toward the opposite inner ends. The connection can be fixed or combined with an attachment. Figure 2 In the adjustable connection shown, a track groove 221 in the same direction as the length direction of the inner rod 22 is provided on the inner end of the sleeve rod 21, and the inner end of the inner rod 22 is connected by a fastening bolt 23 that is transversely penetrated through the rod bodies of the two, and the fastening bolt 23 is penetrated into the track groove 221. The outer end of the sleeve rod 21 and the outer end of the inner rod 22 are rotatably connected to a connector 1 respectively.

[0022] A main spring 3 is sleeved on the outer circumferential surface of the sleeve rod 21, and both ends of the main spring are fixed to the sleeve rod. When the sleeve rod is directly fixedly connected to the inner rod, the length of the main spring is substantially the same as the length of the sleeve rod. When the sleeve rod and the inner rod are adjustably connected with a fastening bolt, the length of the main spring can be slightly shorter than the length of the sleeve rod, leaving an area for setting the fastening bolt at the inner end of the sleeve rod.

[0023] The inner rod 22 is provided with an auxiliary spring 4 in the same direction as the inner rod 22. When the sleeve rod is directly fixedly connected to the inner rod, the inner end of the auxiliary spring 4 is fixed to the inner end of the sleeve rod 21. When the sleeve rod is adjustably connected to the inner rod with a fastening bolt, the inner end of the auxiliary spring 4 is connected and fixed to the fastening bolt 23. The inner end of the auxiliary spring can be wound around the fastening bolt and fixed. The outer end of the auxiliary spring 4 is fixed to the connector 1 connected to the inner rod 22. At least two auxiliary springs 4 are evenly arranged around the circumference of the inner rod 22. Figure 3 As shown, four auxiliary springs are provided. The diameter of the auxiliary spring is much smaller than that of the main spring, and the telescopic deformation and axial deflection deformation of the auxiliary spring are much better than those of the main spring.

[0024] In the working environment, according to the number of mining flatbed trucks required, multiple flatbed trucks are connected in sequence into a fleet through a hard connection device. When connecting the flatbed trucks, the hard connection device of the present application connects the flatbed truck at the rear of the traction direction through a connector at the inner rod end, and connects the flatbed truck at the front of the traction direction through a connector at the sleeve rod end. In the traction direction, the flatbed truck in front is actively pulled, and the flatbed truck at the rear is driven forward. If the front truck brakes, the rear truck will collide forward due to inertia. The hard connection device of the present application has a hard connection between the sleeve rod and the inner rod, which ensures the hard connection strength of the device as a whole. The length of the sleeve rod is the main length of the device as a whole. The main spring sleeved on the sleeve rod ensures the collision buffering of the device as a whole in the direction of travel. When a collision occurs, the auxiliary spring arranged outside the inner rod can immediately buffer most of the impact, and the impact reaching the main spring is greatly reduced, and the impact on the front vehicle is significantly reduced. From the perspective of the entire vehicle fleet, the impact is gradually reduced in sequence. When the rear vehicle follows, especially when the travel route is non-straight and deflection and steering are required, the auxiliary spring connected to the connecting head can adapt to such steering changes and have a better buffering effect; the sleeve rod and the inner rod that are sleeved and connected can, on the one hand, be adjusted to change the overall length of the connecting rod according to the needs of use, and on the other hand, provide conditions for the design and assembly of the main and auxiliary springs. The inner end of the auxiliary spring is connected to the fastening bolt, and the fastening bolt can be as shown in the attached Figure 1 As shown, the connection is made from the inside to the outside of the rod body, and can be made from the outside to the inside of the rod body, so that assembly and adjustment are easy to operate.

[0025] Combined with Figures 3 to 6 As shown, the present application also optimizes and improves the connection between the connecting rod and the connecting head. The outer ends of the sleeve rod 21 and the inner rod 22 are both provided with ball joints 24, the outer end of the sleeve rod 21 is fixed to a ball joint 24, and the outer end of the inner rod 22 is fixed to a ball joint 24, and the diameter of the ball joint 24 is larger than the diameter of the sleeve rod 21; the inner end of the connecting head 1 is provided with an arc groove 11, and the opening surface diameter d of the arc groove 11 1 Greater than the diameter d of the ball swivel 24 2 , the ball joint 24 can be conveniently placed in the arc groove 11, so that the outer end of the sleeve rod and the outer end of the inner rod are respectively connected to a connector, a universal ring 12 is arranged between the ball joint 24 and the arc groove 11, and a split end plate 13 is arranged on the inner end surface of the connector 1 to shield the opening surface of the arc groove 11. The opening diameter d of the split end plate 13 is 3 Greater than the diameter d of the sleeve rod 21 4 and smaller than the diameter d of the ball swivel 24 2 , then the opening diameter d of the split end plate 13 is 3 Greater than the diameter d of the inner rod 22 5 The outer end of the connector 1 is provided with a connecting hole 14, and an anti-drop pin can be inserted into the connecting hole to connect and fix the connector to the flatbed vehicle.

[0026] On the one hand, the ball joint and the connecting head are easy to assemble. In the prior art, the ball joint and the connecting head are generally formed as one piece, and then the connecting rod is screwed to the ball joint. The one-piece molding manufacturing process is difficult and subsequent maintenance is difficult. On the other hand, the gap between the opening of the split end plate and the outer circumference of the sleeve rod and the outer circumference of the inner rod provides space for the sleeve rod and the inner rod to turn with the ball joint and serves as a limiter. The split end plate can be a symmetrical two-piece type, which can be hinged to the inner end face of the connecting head or connected in other ways, and the inner end of the auxiliary spring can be fixed to the split end plate.

[0027] Since the outer diameters of the sleeve rod and the inner rod are slightly different, the ball swivel connected to the sleeve rod and the ball swivel connected to the inner rod can be of the same size, and the connector connected to the sleeve rod and the connector connected to the inner rod can be of exactly the same structure.

Claims

1. A hard connection device for a mining flatbed truck, comprising a connection head (1) and a connection rod (2), characterized in that: The connecting rod (2) comprises a coaxially arranged sleeve rod (21) and an inner rod (22), the outer ends of the sleeve rod (21) and the inner rod (22) being rotatably connected to a connecting head (1); a main spring (3) is sleeved on the outer circumferential surface of the sleeve rod (21), and both ends of the main spring (3) are fixed to the sleeve rod (21); an auxiliary spring (4) is arranged on the outside of the inner rod (22) in the same direction as the length direction thereof, the outer end of the auxiliary spring (4) is fixed to the connecting head (1) connected to the inner rod (22), and the inner end of the auxiliary spring (4) is connected and fixed to the inner end of the sleeve rod (21).

2. The hard connection device for a mining flatbed truck according to claim 1, characterized in that: The inner end of the sleeve rod (21) and the inner end of the inner rod (22) are fixed by a fastening bolt (23); the fastening bolt (23) is transversely arranged to connect the inner end of the sleeve rod (21) and the inner end of the inner rod (22); the inner end of the auxiliary spring (4) is connected and fixed to the fastening bolt (23).

3. The hard connection device for a mining flatbed truck according to claim 2 is characterized in that: A track groove (221) in the same direction as the length direction of the inner rod (22) is provided on the inner end of the inner rod (22), and the fastening bolt (23) is inserted into the track groove (221).

4. The hard connection device for a mining flatbed truck according to claim 1, characterized in that: At least two auxiliary springs (4) are evenly distributed in the circumferential direction of the inner rod (22).

5. The hard connection device for a mining flatbed truck according to claim 1, characterized in that: The length of the sleeve rod (21) is 3 to 5 times the length of the inner rod (22).

6. The hard connection device for a mining flatbed truck according to claim 1, characterized in that: The hard connection device is connected to the mining flatbed truck at the rear of the traction direction through the connecting head (1) at the end of the inner rod (22), and is connected to the mining flatbed truck at the front of the traction direction through the connecting head (1) at the end of the sleeve rod (21).

7. The hard connection device for a mining flatbed truck according to claim 1, characterized in that: The outer ends of the sleeve rod (21) and the inner rod (22) are both fixed to a ball joint (24), the diameter of the ball joint (24) is larger than the diameter of the sleeve rod (21), the inner end of the connector (1) is provided with an arc groove (11), the opening diameter of the arc groove (11) is larger than the diameter of the ball joint (24), the ball joint (24) is placed in the arc groove (11), a universal ring (12) is provided between the ball joint (24) and the arc groove (11), a split end plate (13) is provided on the inner end surface of the connector (1) to cover the opening surface of the arc groove (11), the opening diameter of the split end plate (13) is larger than the diameter of the sleeve rod (21) and smaller than the diameter of the ball joint (24); the outer end of the connector (1) is provided with a connecting hole (14).

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