CN2171509Y - luggage pulley block - Google Patents

Abstract

The utility model relates to a luggage pulley block with improved structure, which is mainly composed of a fixed plate, a connecting shaft and a pulley seat. A columnar shaft tube is provided to connect the fixed plate and the pulley seat, and a concave annular positioning groove is provided at an appropriate depth on the inner edge of the tube body; a protruding convex ring is provided at both ends of the connecting shaft, and the convex rings at both ends of the connecting shaft are respectively inserted into the shaft tube positioning grooves of the fixed plate and the pulley seat, so that the fixed plate and the pulley seat can form a complete pulley block together.

Description

The utility model relates to a suitcase pulley block with improved structure, in particular to a pulley structure in which only a single connecting shaft is respectively plugged into a pulley fixing plate and a pulley seat to simplify assembly.

General common pulley block structure roughly as shown in Figure 1, 2, it mainly consists of a trunk floor 10, a connecting fixed plate 12, a plurality of balls 13 arranged in a ring, a wheel frame 15 for assembling pulley 16 and It is composed of components such as bolts 14 used in combination. When it is assembled, at first, it is necessary to insert some balls 13 arranged at annular intervals in the annular groove 17 on the wheel frame 15, and in addition, the position of the above-mentioned groove 17 on the plate surface of the fixed plate 12 is also installed. grooves 18, when the connecting fixed plate 12 is covered on the ring-shaped balls 13, the ring-shaped balls 13 can be positioned in the two grooves 17, 18, and then fixed bolts such as rivets or screws 14 will connect fixed plate 12 and wheel frame 15 and fix.

From the structure of the above-mentioned pulley, it can be clearly seen that there are a lot of assembly components required, and the entire assembly process is quite cumbersome and time-consuming. In terms of the cost of its assembly, it is extremely uneconomical, and the rolling balls 13 They must be neatly arranged one by one in a ring shape and placed in the groove 17. Since the balls 13 are small and smooth, it is not easy to position them in the sunken groove when picking and placing them. After the arrangement and placement are completed, Two grooves 17, 18 must still be aligned and pressed together, and the fixed plate 12 and the wheel frame 15 are interlocked into a complete pulley block with the fixed bolt 14. Rolling of the balls 13 in the groove can make the pulley block do non-directional steering operation. In the above design, the assembly and positioning of the ball 13 is extremely important, and the general design for positioning the ball 13 is mostly a groove directly and simply punched on the steel plate surface, so as far as the ball 13 is concerned, there is a gap between it and the groove. Appropriate assembly clearance, when used for a period of time, often due to the friction deformation of the 13 surfaces of the balls or the impact of heavy pressure due to uneven surfaces, the channel or the beads may be deformed, thereby forming the mutual engagement between the balls, That will cause unsmooth rotation, which will directly affect the ease of use of the entire pulley block, so how to develop a pulley block that is easy to assemble and has more practical safety features is an active research and development goal in the industry.

The main purpose of the utility model is to overcome the above-mentioned shortcomings, and provide a suitcase pulley block which is easy to assemble and safe to use. The utility model connects the protruding rings at the two ends of the connecting shaft with the shaft tubes provided at the upper and lower halves of the wheel group to insert and connect each other, so that the whole wheel group can have many advantages such as safe operation and low manufacturing cost.

The utility model mainly includes a fixing plate and a wheel frame with pulleys and other components, and is characterized in that it also includes a connecting shaft, and the two ends of the connecting shaft are respectively provided with convex rings; the bottom surface of the fixing plate A protruding shaft tube is left in the center, and a relatively protruding shaft tube is also provided at the opposite position on the top surface of the wheel frame. A concave positioning ring groove is provided at an appropriate position on the inner tube edge of the two shaft tubes for Cooperate with a connecting shaft designed with protruding rings at both ends, and insert the two ends respectively into the positioning ring grooves in the two protruding shaft tubes to connect the fixed plate and the wheel frame to form a pulley block together.

In the suitcase pulley set proposed by the utility model, the outer edge of the convex ring of the connecting shaft can be provided with chamfers.

For further illustrating structural features of the present utility model and its practical purpose, below in conjunction with accompanying drawing is described in detail as follows:

Figure 1 is an exploded view of a common pulley block.

Figure 2 is a schematic diagram of the assembly of a common pulley block.

Fig. 3 is an assembly appearance diagram of the utility model.

Fig. 4 is an assembly exploded view of the utility model.

Fig. 5 is a schematic reference diagram of the utility model before mating.

Fig. 6 is a schematic diagram of the utility model after assembly.

The suitcase pulley block with improved structure proposed by the utility model is shown in Figures 3 and 4. The appearance of the entire pulley block is roughly similar to the design of the existing pulley block. Its biggest feature is that the entire pulley block is divided into upper and lower halves. The half part is mainly composed of a fixed plate 20, which is directly interlocked with the trunk body 30, and a protruding columnar shaft tube 21 is set in the center of the fixed plate 20, and the inner depth of the shaft tube 21 is set A ring groove 22 sunken; the lower half includes a round frame 31, a rotatable pulley 32 is installed at its bottom, and a protruding shaft tube 33 is also established at the central top of the wheel frame 31, which is connected with The shaft tubes 21 protruding from the center of the fixing plate 20 are designed to be symmetrical to each other, and the inner depths of the protruding shaft tubes 33 on the wheel frame 31 are also provided with symmetrical recessed ring grooves 34 .

The utility model also includes a connecting shaft 23 with protruding protruding rings 24, 241 at the upper and lower ends respectively, and a chamfer 25 is provided on the outer edge of each protruding ring 24, 241 respectively. When assembling, as shown in Figure 5 and Figure 6, the upper end of the connecting shaft 23 is inserted into the shaft tube 21 of the fixed plate 20 in a convenient and strong pressing manner, and the upper convex ring 24 is inserted into the shaft tube 21 in the concave ring groove 22, so that the other end of the connecting shaft 23 is inserted into the shaft tube 33 on the wheel frame 31, so that the lower convex ring 241 is inserted into the concave ring groove 34 of the shaft tube 33 for positioning. , The upper and lower halves of the whole pulley block are connected to each other by a connecting shaft 23. Through the interfitting of the protruding rings 24, 241 and the ring grooves 22, 34, the upper fixing plate 20 and the lower wheel frame 31 can be connected to the shaft 23 to rotate in any direction without using bearings. Compared with the common pulley block, the utility model has simple structure and reasonable design, which not only can greatly reduce the production of assembly components, but also can achieve a comprehensive and large-scale reduction in the technical level of the entire assembly and assembly man-hours. The actual manufacturing cost is reduced, and it is actually a very innovative and more practical pulley block structural design.

Claims (2)

1. A suitcase pulley block, which includes a fixed plate and a lock wheel frame with pulleys, and is characterized in that it also includes a connecting shaft, and the two ends of the connecting shaft are respectively provided with convex rings; A protruding shaft tube is provided in the center of the bottom surface of the plate, and a relatively protruding shaft tube is also provided on the top surface of the wheel frame. The inner tubes of these two shaft tubes are provided with a concave positioning ring groove. The protruding rings at both ends of the connecting shaft are respectively inserted into the positioning ring grooves in the two protruding shaft tubes, so that the connecting fixing plate and the wheel frame together form a pulley block. 2. The pulley block according to claim 1, characterized in that the outer edge of the convex ring of the connecting shaft can be pre-chamfered.

Images