Pulley yoke body, pulley mounting structure and vehicle

Abstract

The utility model relates to the field of operation machinery, and discloses a pulley yoke body, a pulley mounting structure and a vehicle. The pulley yoke body comprises a pulley mounting seat which comprises two side vertical plates which are arranged in parallel at intervals, a pulley mounting cavity for accommodating a pulley and a mounting block are clamped between the two side vertical plates, and the two ends of the pulley mounting seat are clamped and fixed to the two side vertical plates respectively; and the connecting rod is fixedly connected with the mounting block. The pulley mounting structure comprises the pulley yoke body. The vehicle comprises the arm frame and the pulley installation structure, and the pulley frame body is installed on the arm frame. According to the pulley yoke body, the pulley mounting structure and the vehicle, the welding part can be prevented from bearing force, the stress concentration of the stressed part is reduced, and the reliability of an arm support of the vehicle is improved.

Description

Technical Field

[0001] The present application belongs to the field of operating machinery, and specifically, relates to a pulley frame, a pulley mounting structure and a vehicle. Background Art

[0002] Fire trucks transport firefighters and firefighting equipment to a predetermined area for firefighting operations through the telescopic movement of the boom. During the telescopic process of the boom, a pulley is generally required to bear the force. Since the pulley is equivalent to a lever, there is a huge pulling force between the mounting seat of the pulley frame and the boom, so it is necessary to ensure the structural strength of the pulley frame and the reliability of the connection between the mounting seat and the boom.

[0003] In the current pulley frame structure, the pulley mounting seat and the connecting rod are connected by welding. Since the welding part bears the force, it is easy for the welding structure to fail and cause safety hazards. In addition, the pulley frame cannot rotate relative to the arm frame, which leads to stress concentration at the force-bearing part between the pulley frame and the arm frame, and then structural failure occurs. Summary of the invention

[0004] The purpose of this application is to provide a pulley frame, a pulley mounting structure and a fire truck to improve the structural stress performance and enhance the safety and reliability of product use.

[0005] On one hand, the present application provides a pulley frame, the pulley frame comprising:

[0006] The pulley mounting seat comprises two side vertical plates arranged in parallel and spaced apart, and a pulley mounting cavity for accommodating the pulley is sandwiched between the two side vertical plates;

[0007] The mounting block has two ends respectively clamped and fixed to the vertical plates on both sides;

[0008] A connecting rod is fixedly connected to the mounting block.

[0009] In some embodiments, a threaded connection is formed between the connecting rod and the mounting block.

[0010] In some embodiments, the pulley mounting seat is provided with an embedding hole penetrating through the vertical plates on both sides, and the mounting block is embedded in the embedding hole.

[0011] In some embodiments, the cross-sections of the embedding hole and the mounting block are both regular polygons; and / or, the pulley mounting seat is provided with a pulley shaft mounting hole that passes through the vertical plates on both sides.

[0012] A second aspect of the present application provides a pulley mounting structure, which includes the above-mentioned pulley frame.

[0013] In some embodiments, the pulley mounting structure includes:

[0014] The mounting seat comprises a frame mounting hole and a pin mounting hole whose axes are perpendicular to each other, and a connecting rod passes through the frame mounting hole;

[0015] Connect the pin shaft, pass it through the pin shaft mounting hole and fix it;

[0016] One end of the pin shaft mounting hole is formed as an internal threaded hole, the first end of the connecting pin shaft is formed as an external threaded end, and the first end of the connecting pin shaft passes through the pin shaft mounting hole and is threadedly connected to the internal threaded hole.

[0017] In some embodiments, the connecting rod is a double-headed screw rod, and the mounting seat is sleeved on the connecting rod and fixed by a nut at the end.

[0018] In some embodiments, the pulley mounting structure includes:

[0019] A connecting shaft sleeve, sleeved on the connecting pin shaft;

[0020] The end clamping plate is fixedly mounted on the end of the connecting sleeve and is used to limit the second end of the connecting pin from jumping out.

[0021] In some embodiments, a positioning shoulder is formed on the second end of the connecting pin, and a shoulder counterbore for accommodating the positioning shoulder is formed on the end clamping plate.

[0022] In some embodiments, the second end of the connecting pin shaft is also formed with a circumferential limiting protrusion protruding axially from the end face of the positioning shoulder, and a penetrating circumferential limiting hole is formed on the end clamping plate, and the cross-section of the circumferential limiting protrusion and the circumferential limiting hole are both regular polygons.

[0023] A third aspect of the present application provides a vehicle, which also includes the above-mentioned pulley mounting structure, and the pulley frame is installed on the arm.

[0024] In the technical solution of the present application, the pulley mounting seat and the connecting rod are connected by the mounting block, so that the load can be borne by the vertical plate and the mounting block, and by the mounting block and the connecting rod. Compared with the prior art, the welding connection between the vertical plate and the connecting rod can avoid the load bearing of the welding part, thereby improving the structural reliability and safety of the pulley frame; after the pulley frame and the mounting seat are assembled, a pulley mounting structure is formed with a fixed connecting pin shaft. Such a setting can reduce the constraint between the connecting pin shaft and the mounting seat, so that the mounting seat can be slightly rotated relative to the connecting pin shaft, thereby avoiding stress concentration in the force-bearing area; during the extension movement of the arm of the vehicle including the pulley mounting structure, the pulley frame and the pulley mounting structure will not fail due to the huge pulling force borne by the pulley, so that it can work more safely and reliably.

[0025] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0027] Figure 1 It is a structural schematic diagram of a pulley frame according to a specific embodiment of the present application;

[0028] Figure 2 For Figure 1 A cross-sectional view of the AA position;

[0029] Figure 3 It is a structural schematic diagram of a pulley installation structure according to a specific embodiment of the present application, wherein a mounting seat is mounted on the connecting rod of the pulley frame;

[0030] Figure 4 for Figure 3 A schematic diagram of a structure in which the pulley mounting structure is installed on the boom;

[0031] Figure 5 for Figure 3 A schematic diagram of the structure of the mounting base;

[0032] Figure 6 for Figure 4 A side view of the mounting base in FIG.

[0033] Figure 7 for Figure 4 A schematic diagram of the structure of the connecting pin shaft;

[0034] Figure 8 for Figure 4 A schematic diagram of the structure of the end card plate in FIG.

[0035] Fig. 9 for Figure 8 Side view of the end bracket in FIG.

[0036] Description of Reference Numerals

[0037] 100 Pulley mounting seat 420 Pin mounting hole

[0038] 110 pulley 500 connecting pin

[0039] 120 vertical plate 510 positioning shoulder

[0040] 130 Pulley shaft mounting hole 520 Circumferential limiting protrusion

[0041] 140 Mounting hole 600 End nut

[0042] 200 Mounting block 700 Connecting sleeve

[0043] 300 Connecting rod 800 End plate

[0044] 400 Mounting Seat 810 Shaft Shoulder Countersunk Hole

[0045] 410 frame mounting hole 820 circumferential limit hole

[0046] 900 Boom DETAILED DESCRIPTION

[0047] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0048] The pulley frame, pulley mounting structure and vehicle according to the present application are described below with reference to the accompanying drawings.

[0049] The present application discloses a novel pulley frame body, such as Figure 1 , Figure 2 and Figure 3 As shown, a pulley frame body in a specific embodiment includes:

[0050] The pulley mounting seat 100 includes two side vertical plates 120 arranged in parallel and spaced apart, and a pulley mounting cavity for accommodating the pulley 110 is sandwiched between the two side vertical plates 120;

[0051] The mounting block 200 has two ends that are respectively clamped and fixed to the vertical plates 120 on both sides;

[0052] The connecting rod 300 is fixedly connected to the mounting block 200 .

[0053] Specifically, the pulley 110 can be installed on the pulley mounting seat 100 through the pulley shaft mounting hole 130 shown in the figure, and the pulley mounting seat 100 is fixedly mounted on the connecting rod 300. When the pulley 110 is subjected to the tension of the connecting rope, the tension torque acting on the connecting rod 300 is dispersed to the two side vertical plates 120 through the clamping and fixing parts at both ends of the mounting block 200, thereby reducing the stress concentration. Comparably, in the prior art, since the connecting rod is directly welded and mounted on the mounting seat, the stress formed by the tension torque is concentrated on the welding portion between the connecting rod and the mounting seat, causing the welding structure to be prone to structural failure. Compared with the prior art, the product structure of the pulley frame of the present application is safer and has high structural reliability.

[0054] In this embodiment, a threaded connection may be formed between the connecting rod 300 and the mounting block 200 .

[0055] Specifically, the connecting rod 300 is threadedly connected to the mounting block 200, so that it can be quickly disassembled and assembled, and the structural reliability can be taken into account. In addition, after the connecting rod 300 is connected to the mounting block 200, the sealing plate provided with the connecting rod through hole is welded to the pulley mounting seat 100 to close the pulley mounting cavity. Among them, the connecting rod 300 is arranged through the connecting rod through hole. With such an arrangement, when the pulley mounting seat 100 is subjected to force, it mainly relies on the mounting block 300 and the vertical plate 120 to transmit force, the force on the sealing plate weld is very small, and the structure is safer. Of course, the connecting rod 300 and the mounting block 200 can also be forged as one piece.

[0056] In one embodiment, the pulley mounting seat 100 is provided with an embedding hole 140 that passes through the vertical plates 120 on both sides, and the mounting block 200 is embedded in the embedding hole 140. Specifically, the mounting block 200 can be inserted into the embedded hole 140 that passes through, and both ends of the mounting block 200 are clamped and fixed to the embedding hole 140 of the pulley mounting seat 100, so that the tensile moment of the connecting rod 300 can be dispersed to the vertical plates 120 on both sides, thereby reducing stress concentration.

[0057] Of course, the mounting block 200 is not limited to being connected to the vertical plates 120 on both sides by means of the embedding holes 140 penetrating the vertical plates 120 on both sides. For example, buckles, non-penetrating slots, countersunk holes, etc. may also be provided on the inner sides of the vertical plates 120 on both sides, so that the two ends of the mounting block 200 can be respectively clamped and fixed on the inner sides of the vertical plates, and even the mounting block 200 can be integrally formed with the pulley mounting seat 100. In one embodiment, as Figure 1 As shown, the cross-sections of the embedding hole 140 and the mounting block 200 can be regular polygons; and / or, the pulley mounting seat 100 is provided with a pulley shaft mounting hole 130 that passes through the two side vertical plates 120 .

[0058] Specifically, see Figure 1 , setting the cross-section of the embedded control and the mounting block 200 to the same regular polygon can realize the embedding of the mounting block 200 in the embedded hole 140, and the relative rotation between the connecting rod 300 and the pulley mounting seat 100 can be limited by the abutment between the embedded hole 140 and the mounting block 200, that is, it is conducive to the stable positioning of the pulley mounting seat 100 relative to the connecting rod 300. Of course, the cross-sections of the embedded hole 140 and the mounting block 200 are not limited to regular polygons, such as irregular triangles, etc., which should also fall within the scope of protection of this application. In addition, the pulley can be connected to the pulley mounting seat 100 through the pulley shaft installed in the pulley shaft mounting hole 130, so as to realize the positioning of the pulley. Of course, there are many ways to realize the installation of the pulley shaft on the pulley mounting seat 100, such as the pulley shaft and the pulley mounting seat 100 are integrally formed, or the pulley shaft is installed through the countersunk hole opened on the vertical plate 120.

[0059] The pulley frame of the present application can be installed on, for example, an arm frame through a connecting rod 300. In a specific embodiment, a novel pulley installation structure including the pulley frame is disclosed.

[0060] like Figures 3 to 6 As shown, the pulley mounting structure may include:

[0061] See also Figure 6 The mounting seat 400 includes a frame mounting hole 410 and a pin mounting hole 420 whose axes are perpendicular to each other, and the connecting rod 300 passes through the frame mounting hole 410;

[0062] The connecting pin 500 passes through the pin mounting hole 420 and is fixedly arranged;

[0063] Among them, one end of the pin shaft mounting hole 420 can be formed as an internal threaded hole, and the first end of the connecting pin shaft 500 can be formed as an external threaded end. The first end of the connecting pin shaft 500 passes through the pin shaft mounting hole 420 and is threadedly connected to the internal threaded hole.

[0064] See also Figure 4 One end of the connecting pin 500 can be fixedly mounted on, for example, the arm 900 shown in the figure, and the other end is connected to the pin mounting hole 420. In this embodiment, see Figure 4 , the pin shaft mounting hole 420 of the mounting seat 400 can be threadedly connected with the fixed connecting pin shaft 500, that is, the external thread end (i.e., the first end) of the connecting pin shaft 500 is threadedly connected with the internal thread hole at the end of the pin shaft mounting hole 420. At this time, if the pulley 110 is subjected to the tension of the connecting rope, it can drive the mounting seat 400 to rotate slightly relative to the fixed connecting pin shaft 500, thereby achieving partial stress release.

[0065] As an example, the connecting rod 300 is a double-ended screw rod, and the mounting seat 400 is sleeved on the connecting rod 300 and fixed by an end nut 600. Figure 3 One end of the connecting rod 300 is threadedly connected to the mounting block 200, and the other end is threadedly connected to the end nut 600, wherein the end nut 600 is a double nut well known to those skilled in the art, which can not only limit the connection rod 300 from being separated from the mounting seat 400, but also adjust the tension of the connecting rope of the pulley 110 through the cooperation between the end nut 600 and the connecting rod 300. Of course, the connecting rod 300 can also be a structure with a plurality of pin holes, and the positioning of the connecting rod 300 on the mounting seat 400 and the adjustment of the tension of the connecting rope of the pulley 110 can be achieved through the cooperation between the positioning pin and the pin hole.

[0066] As an example, the pulley mounting structure may include:

[0067] A connecting sleeve 700 is sleeved on the connecting pin 500;

[0068] The end clamping plate 800 is fixedly mounted on the end of the connecting sleeve 700 and is used to limit the second end of the connecting pin shaft 500 from protruding.

[0069] like Figure 4 As shown, when one end of the connecting pin 500 is fixedly mounted on the arm 900 shown in the figure, an arm mounting hole can be provided in the arm 900, and a connecting sleeve 700 can be fixedly embedded in the arm mounting hole, and the second end (i.e., the right end shown in the figure) of the connecting pin 500 is further embedded in the connecting sleeve 700, and the end of the second end is limited by an end clamping plate 800. Through the coordinated setting of the connecting sleeve 700 and the end clamping plate 800, the connecting pin 500 can be quickly and conveniently fixed. Of course, the connecting pin 500 can also be fixedly connected to the arm 900 by welding or other methods.

[0070] like Figure 7 As shown, the second end of the connecting pin 500 may be formed with a positioning shoulder 510. Figure 8 , Fig. 9 As shown, the end clamping plate 800 may be formed with a shoulder counterbore 810 for accommodating the positioning shoulder 510. Figure 4 The positioning shoulder 510 is limitedly abutted against the end surface of the connecting sleeve 700, which can limit the first end of the connecting pin 500 from jumping out. At the same time, the positioning shoulder 510 falls into the shoulder counterbore 810, and the end clamp 800 can limit the second end of the connecting pin 500 from jumping out.

[0071] The connecting sleeve 700 can be fixedly installed in the arm mounting hole by interference fit. Further, in order to prevent the connecting pin 500 from rotating in the connecting sleeve 700, the second end of the connecting pin 500 can also be formed with a circumferential limiting protrusion 520 axially protruding from the end surface of the positioning shoulder 510, as shown in FIG. Figure 7 The end plate 800 is formed with a circumferential limit hole 820 extending therethrough, see Fig. 9 See also Figure 4 With such a configuration, the circumferential limiting protrusion 520 can be matched with the circumferential limiting hole 820 on the end clamping plate 800, thereby limiting the circumferential rotation of the connecting pin shaft 500.

[0072] In the illustrated embodiment, the cross section of the circumferential limiting protrusion 520 and the circumferential limiting hole 820 are both regular polygons. Of course, the cross section of the circumferential limiting protrusion 520 and the circumferential limiting hole 820 are not limited thereto, and may also be irregular triangles, etc., which should also fall within the protection scope of this application.

[0073] The present application also protects a vehicle including the above-mentioned pulley mounting structure, wherein the pulley frame is mounted on an arm 900 of the vehicle.

[0074] As an example, the specific assembly process of the above pulley mounting structure on the arm 900 may be:

[0075] 1) Install the connecting sleeve 700 on the arm 900; 2) The external threaded end of the connecting pin 500 is passed through the connecting sleeve 700 and the pin mounting hole 420 of the mounting seat 400 in sequence; 3) The external threaded end of the connecting pin 500 is screwed into the internal threaded hole end of the pin mounting hole 420 until the positioning shoulder 510 abuts against the connecting sleeve 700; 4) The end clamp 800 is installed on the connecting sleeve 700 to achieve the axial and circumferential positioning of the connecting pin 500. It can be seen that the above assembly process is convenient to operate, saves time and effort, and the positioning of the connecting pin 500 is accurate. The end clamp 800 can limit the axial displacement and circumferential displacement of the connecting pin 500.

[0076] During the extension movement of the arm 900 equipped with the pulley mounting structure, the pulley frame and the pulley mounting structure have high safety and reliability, so the arm 900 is not likely to fail due to the huge pulling force on the pulley 110, thereby causing problems such as arm drop, and the safety and reliability are improved. The vehicle may be a fire truck or a pump truck.

[0077] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

Claims

1. The pulley frame is characterized in that: The pulley frame body comprises: The pulley mounting seat (100) comprises two side vertical plates (120) arranged in parallel and spaced apart, wherein a pulley mounting cavity for accommodating a pulley (110) is sandwiched between the two side vertical plates (120); A mounting block (200) with two ends respectively clamped and fixed to the vertical plates (120) on both sides; and A connecting rod (300) is fixedly connected to the mounting block (200).

2. The pulley frame according to claim 1, characterized in that: A threaded connection is formed between the connecting rod (300) and the mounting block (200).

3. The pulley frame according to claim 1, characterized in that: The pulley mounting seat (100) is provided with an embedding hole (140) penetrating the vertical plates (120) on both sides, and the mounting block (200) is embedded in the embedding hole (140).

4. The pulley frame according to claim 3, characterized in that: The cross sections of the embedding hole (140) and the mounting block (200) are both regular polygons; and / or the pulley mounting seat (100) is provided with a pulley shaft mounting hole (130) penetrating the vertical plates (120) on both sides.

5. The pulley installation structure is characterized in that: The pulley mounting structure comprises a pulley frame according to any one of claims 1 to 4.

6. The pulley mounting structure according to claim 5, characterized in that: The pulley mounting structure comprises: The mounting seat (400) comprises a frame mounting hole (410) and a pin mounting hole (420) whose axes are perpendicular to each other, and the connecting rod (300) passes through the frame mounting hole (410); A connecting pin (500) is inserted into the pin installation hole (420) and fixedly arranged; One end of the pin shaft mounting hole (420) is formed as an internal threaded hole, and the first end of the connecting pin shaft (500) is formed as an external threaded end. The first end of the connecting pin shaft (500) passes through the pin shaft mounting hole (420) and is threadedly connected to the internal threaded hole.

7. The pulley mounting structure according to claim 6, characterized in that: The connecting rod (300) is a double-headed screw rod, and the mounting seat (400) is sleeved on the connecting rod (300) and fixed by an end nut (600).

8. The pulley mounting structure according to claim 7, characterized in that: The pulley mounting structure comprises: A connecting sleeve (700) sleeved on the connecting pin (500); The end clamping plate (800) is fixedly mounted on the end of the connecting sleeve (700) and is used to limit the second end of the connecting pin shaft (500) from protruding.

9. The pulley mounting structure according to claim 8, characterized in that: A positioning shoulder (510) is formed at the second end of the connecting pin shaft (500), and a shoulder counterbore (810) for accommodating the positioning shoulder (510) is formed on the end clamping plate (800).

10. The pulley mounting structure according to claim 9, characterized in that: The second end of the connecting pin shaft (500) is also formed with a circumferential limiting protrusion (520) axially protruding from the end face of the positioning shoulder (510), and the end clamping plate (800) is formed with a penetrating circumferential limiting hole (820), and the cross-section of the circumferential limiting protrusion (520) and the circumferential limiting hole (820) are both regular polygons.

11. A vehicle, comprising a boom (900), characterized in that: The vehicle further comprises a pulley mounting structure according to any one of claims 5 to 10, wherein the pulley frame is mounted on the arm (900).

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