Transmission shield for jaw crusher and jaw crusher

Abstract

The utility model relates to the technical field of mining equipment, in particular to a transmission protective cover for a jaw crusher and the jaw crusher, and adopts the technical scheme that the transmission protective cover comprises a belt protective cover and a flywheel protective cover, the belt protective cover comprises a belt wheel lower protective cover and a belt wheel upper protective cover, and the belt wheel lower protective cover and the belt wheel upper protective cover are fixedly connected to form a split type up-down structure; the supporting legs are used for supporting the belt protective cover and the flywheel protective cover; and the connecting plate is used for connecting the belt protective cover and the flywheel protective cover. The scheme has the advantages that the installation process is simplified, the maintenance efficiency is improved, the structural strength is enhanced, and the universality is improved.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, and in particular to a transmission guard for a jaw crusher and a jaw crusher. Background Technology

[0002] Jaw crushers, as core equipment in the mining industry, are widely used in the primary crushing of ores. Their transmission system is typically belt-driven, transmitting power through the interaction of a driving pulley and a driven pulley. However, jaw crushers often operate in harsh environments with high dust levels, significant vibration, and easy intrusion of foreign objects. The drive belt is susceptible to damage from impacts from gravel, metal fragments, and other debris, and the high-speed operation of the belt poses a serious safety hazard to operators. Therefore, existing technologies typically employ protective covers to safeguard the drive belt and flywheel.

[0003] Currently, most protective covers on the market adopt a split left-right structure. Their installation requires sequentially aligning and securing the left and right covers, leading to cumbersome operations. Replacing the belt necessitates complete disassembly of the cover, resulting in low maintenance efficiency. Furthermore, these covers are prone to deformation during transportation or long-term use due to insufficient structural strength, affecting their protective effect. Existing protective covers often employ rigid designs for their support legs and connections, making them difficult to adapt to the installation requirements of different jaw crusher models. For example, the distance between the flywheel and pulley cannot be flexibly adjusted, resulting in poor versatility.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a transmission guard for a jaw crusher and a jaw crusher in general, which has the advantages of simplifying the installation process, improving maintenance efficiency, enhancing structural strength, and increasing versatility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This application provides a transmission guard for a jaw crusher, the technical solution of which is as follows: it includes a belt guard and a flywheel guard, the belt guard includes a lower pulley guard and an upper pulley guard, the lower pulley guard and the upper pulley guard are fixedly connected to form a split upper and lower structure; multiple support legs are used to support the belt guard and the flywheel guard; a connecting plate is used to connect the belt guard and the flywheel guard.

[0008] Furthermore, this application also proposes that the lower pulley cover and the upper pulley cover are symmetrically arranged with the axis connecting the driving pulley and the driven pulley as the center line; wherein, the inner cavity of the belt cover formed by the combination of the lower pulley cover and the upper pulley cover is constructed as an irregular cavity that is narrow at one end and wide at the other end.

[0009] Furthermore, this application proposes that angle steel is provided on the upper edge of the pulley lower guard and the lower edge of the pulley upper guard, and at least one side of the two angle steels are attached together and fixed by bolts. Furthermore, this application proposes that the top of the pulley upper guard and the top of the flywheel guard are fixedly connected by a connecting plate. Furthermore, this application proposes that a connecting seat is provided on the top of both the pulley upper guard and the top of the flywheel guard, and both ends of the connecting plate are respectively connected to the connecting seat, and the connecting plate can be adjusted relative to the connecting seat to adapt to the distance between the driven pulley and the flywheel.

[0010] Furthermore, this application also proposes that one of the ends of the connecting seat and the connecting plate is provided with a connecting hole, and the other is provided with a strip hole; the connecting hole and the strip hole are fixedly connected by a screw fastener, and the position of the connecting plate and the connecting seat is adjusted based on the position of the screw fastener relative to the strip hole.

[0011] Furthermore, this application also proposes that the lower pulley guard, the upper pulley guard, and / or the flywheel guard are provided with through holes, wherein the through holes are hollow structures or have perforated plates embedded in them. Furthermore, this application also proposes that the plurality of support legs include a first support leg, a second support leg, and a third support leg.

[0012] The first and second legs support the two ends of the lower pulley guard, respectively, and the third leg supports the flywheel guard. Furthermore, this application also proposes that the lower pulley guard, upper pulley guard, and flywheel guard are made of high-strength steel plate with a thickness of 5-10 mm.

[0013] Furthermore, this application also proposes a jaw crusher, including the aforementioned transmission guard, wherein the lower pulley guard and the upper pulley guard in the transmission guard are fixed to both sides of the jaw crusher body by the support legs, and the belt guard and the flywheel guard cover the outer side of the jaw crusher's transmission belt and flywheel.

[0014] As can be seen from the above, the present application provides a transmission guard for a jaw crusher and a jaw crusher, including a belt guard and a flywheel guard. The belt guard includes a lower pulley guard and an upper pulley guard, which are fixedly connected to form a split upper and lower structure. Multiple support legs are used to support the belt guard and the flywheel guard. A connecting plate is used to connect the belt guard and the flywheel guard. The split upper and lower structure simplifies the installation process, improves maintenance efficiency, enhances structural strength, and improves versatility. It has the advantages of simplifying the installation process, improving maintenance efficiency, enhancing structural strength, and improving versatility. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a transmission guard provided in this application.

[0016] Figure 2 This is a side view of a transmission guard provided in this application.

[0017] Figure 3 This is a schematic diagram of a jaw crusher with a transmission guard provided in this application. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0020] The fact that it is constructed and operated in a specific orientation should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Example 1:

[0025] like Figure 1 and 2 As shown, this embodiment proposes a transmission guard for a jaw crusher 14, including a belt guard and a flywheel guard 2. The belt guard consists of a lower pulley guard 1 and an upper pulley guard 7, which are fixedly connected to form a split upper and lower structure. Multiple support legs (including a first support leg 4, a second support leg 5, and a third support leg 6) are used to support the belt guard and the flywheel guard 2. A connecting plate 3 is used to connect the belt guard and the flywheel guard 2.

[0026] Therefore, the technical solution of this application, through the design of a split upper and lower belt guard (lower pulley guard 1 and upper pulley guard 7) and flywheel guard 2, combined with multiple support legs (first support leg 4, second support leg 5 and third support leg 6) and connecting plate 3, effectively solves the technical problem of effectively protecting the transmission belt and flywheel 12 of the jaw crusher 14 transmission guard in harsh environments. Specifically, the split upper and lower structure simplifies the installation and maintenance process, the support legs (first support leg 4, second support leg 5 and third support leg 6) provide stable support, and the connecting plate 3 ensures a solid connection between the guards, further improving the overall protective effect of the guards. Compared with the prior art, the technical solution of this application has significant advantages in terms of structural strength, ease of installation, and versatility.

[0027] Furthermore, this application proposes that the lower pulley guard 1 and the upper pulley guard 7 are symmetrically arranged with the axis connecting the driving pulley and the driven pulley 11 as the center line; wherein, the inner cavity of the belt guard formed by the combination of the lower pulley guard 1 and the upper pulley guard 7 is constructed as an irregularly shaped cavity that is narrow at one end and wide at the other. Specifically, the symmetrical arrangement of the lower pulley guard 1 and the upper pulley guard 7 can be achieved through...

[0028] A symmetrical axis is set on the connecting line between the driving pulley and the driven pulley 11 to ensure precise alignment during installation. The inner cavity of the belt guard is designed as an irregularly shaped cavity that is narrow at one end and wide at the other. This can be achieved by setting cavities of different widths on the inner side of the guard, with the narrow end close to the driving pulley and the wide end close to the driven pulley 11, to accommodate the shape changes of the belt during operation. As a preferred embodiment, the inner cavity of the guard can be manufactured by molding or segmented welding to ensure the accuracy of its shape and the stability of its structure.

[0029] Therefore, this technical solution ensures the balance and stability of the pulley by symmetrically arranging the lower pulley guard 1 and the upper pulley guard 7, thereby reducing vibration and noise. Simultaneously, the irregular cavity design better adapts to the shape changes of the belt during operation, providing more effective protection, preventing foreign object intrusion, and reducing belt wear. Compared with existing technologies, this solution not only improves the protective effect of the guard but also enhances the overall structural strength and durability, solving the problems of existing guards being prone to deformation and having low maintenance efficiency in harsh environments.

[0030] Furthermore, this application proposes that angle steel 13 be provided on the upper edge of the lower pulley cover 1 and the lower edge of the upper pulley cover 7, with at least one side of the two angle steel 13 facing each other and fixed together by bolts. The angle steel 13 further enhances the structural strength of the cover edges, preventing deformation or loosening due to vibration or impact. The side-facing design of the angle steel 13 makes the connection between the two covers (lower pulley cover 1 and upper pulley cover 7) tighter, while the bolt fixing ensures the stability of the connection. As a preferred embodiment, the size and thickness of the angle steel 13 can be adjusted according to the specific size and stress conditions of the cover to adapt to different application scenarios. In addition, the specifications and number of bolts can also be optimized according to actual needs to ensure the reliability and durability of the connection.

[0031] To address this issue, the technical solution of this application effectively solves the problem of unstable connection between the lower pulley cover 1 and the upper pulley cover 7 by combining angle steel 13 and bolts. The angle steel 13 not only enhances the rigidity of the cover edges but also provides a larger contact area, making the bolt connection more secure. The use of bolts further ensures the stability of the cover under vibration and impact, thereby improving the overall protective effect and service life of the cover. Compared with existing technologies, this solution significantly improves the connection stability of the cover through simple structural improvements, while reducing the difficulty of maintenance and installation, demonstrating high practicality and economy.

[0032] Furthermore, this application proposes that the top of the pulley upper cover 7 and the top of the flywheel cover 2 are fixedly connected by a connecting plate 3. Both ends of the connecting plate 3 are connected to the tops of the pulley upper cover 7 and the flywheel cover 2, respectively. The connecting plate 3 can be provided with connecting holes 9 or slotted holes 10 at both ends, and is fixedly connected by screws, allowing the connecting plate 3 to be adjusted relative to the pulley upper cover 7 and the flywheel cover 2 to accommodate the distance between the driven pulley 11 and the flywheel 12. This application uses the connecting plate 3 to fix the tops of the pulley upper cover 7 and the flywheel cover 2, ensuring the overall stability of the cover. The use of the connecting plate 3 also provides structural flexibility, allowing the cover to adapt to different installation environments and requirements. This connection method not only simplifies the installation process but also improves maintenance efficiency, ensuring the cover remains stable and reliable during long-term use. Compared with the prior art, the technical solution of this application, through the adjustable design of the connecting plate 3, solves the problem of cover installation...

[0033] The adaptability issues caused by the change in the distance between the flywheel 12 and the pulley during the process have improved the versatility and installation efficiency of the protective cover.

[0034] like Figure 1 As shown, both the top of the pulley upper guard 7 and the top of the flywheel guard 2 are provided with connecting seats 8. Both ends of the connecting plate 3 are connected to the connecting seats 8, and the connecting plate 3 can be adjusted relative to the connecting seats 8 to accommodate the distance between the driven pulley 11 and the flywheel 12. Specifically, the connecting seat 8 can be designed as a base with fixing holes, and the end of the connecting plate 3 is provided with mounting holes that mate with the connecting seat 8. The connecting plate 3 and the connecting seat 8 are connected by bolts or screws, wherein the mounting hole of the connecting plate 3 can be a slotted hole 10 to facilitate position adjustment during connection. As a preferred embodiment, the fixing hole of the connecting seat 8 and the slotted hole 10 of the connecting plate 3 are connected by bolts, and the bolts can slide within the slotted hole 10, thereby achieving flexible adjustment of the connecting plate 3 relative to the connecting seat 8. Furthermore, shims or springs or other elastic elements can be provided between the connecting plate 3 and the connecting seat 8 to further increase the flexibility and stability of adjustment.

[0035] Therefore, this application achieves flexible adjustment of the connecting plate 3 relative to the connecting seat 8 by using the connecting seat 8 on the top of the pulley cover 7 and the flywheel cover 2, as well as the adjustable connecting plate 3. This design allows the connecting plate 3 to be flexibly adjusted according to the distance between the driven pulley 11 and the flywheel 12, thereby adapting to the installation requirements of different models of jaw crushers 14. This adjustable connection method not only improves the versatility of the transmission cover but also simplifies the installation and maintenance process, enhancing the adaptability and efficiency of the equipment. Compared with the prior art, the technical solution of this application solves the problem of the inflexible adjustment of the traditional cover connection structure, significantly improving the adaptability and installation efficiency of the cover.

[0036] Furthermore, one end of the connecting seat 8 and the connecting plate 3 is provided with a connecting hole 9, and the other end is provided with a strip-shaped hole 10. The connecting hole 9 and the strip-shaped hole 10 are fixedly connected by a screw, and the position of the connecting plate 3 and the connecting seat 8 is adjusted based on the position of the screw relative to the strip-shaped hole 10. Specifically, the connecting hole 9 can be a circular hole, while the strip-shaped hole 10 is an elongated hole whose length direction is consistent with the adjustment direction of the connecting plate 3. The screw can be a bolt, screw, or other similar fastener, which passes through the connecting hole 9 and the strip-shaped hole 10 and is fixed by a nut or other fixing device. The screw can move along the length direction of the strip-shaped hole 10 within the strip-shaped hole 10, thereby realizing the adjustment of the relative position between the connecting plate 3 and the connecting seat 8. As a preferred embodiment, limiting structures can be provided at both ends of the strip-shaped hole 10 to prevent the screw from disengaging from the strip-shaped hole 10 during adjustment.

[0037] The working principle of this technical solution is that the connecting plate 3 can be adjusted relative to the connecting seat 8 through the cooperation of the connecting hole 9 and the strip hole 10. The range of movement of the bolted component within the strip hole 10 determines the adjustment range of the connecting plate 3, thus adapting to the installation requirements of different models of jaw crushers 14, especially the variation in the distance between the flywheel 12 and the pulley. Therefore, this design solves the problem of inconvenient position adjustment between the connecting plate 3 and the connecting seat 8, improving the versatility and installation efficiency of the protective cover. Compared with existing technologies, this solution has advantages such as simple structure, flexible adjustment, and convenient installation, effectively improving the practicality and maintenance efficiency of the protective cover.

[0038] Furthermore, through holes are provided on the lower pulley cover 1, the upper pulley cover 7, and / or the flywheel cover 2. These through holes may be hollow structures or have perforated plates embedded within them. Specifically, the through holes can be implemented in various ways. For example, the hollow structure can be a regular...

[0039] The perforated plates can be geometrically (e.g., circular, square, rhomboid, etc.) or irregularly shaped, and their size and distribution can be adjusted according to actual needs to ensure effective ventilation while preventing the intrusion of larger foreign objects. The perforated plates can be made of metal or composite materials, and the holes on the plates can be designed with different diameters and arrangements according to protection requirements to balance ventilation and protective performance. Furthermore, the perforated plates can be installed by welding, bolting, or snap-fit ​​connections to adapt to different shield structures and maintenance needs.

[0040] Through the above design, the weight of the lower pulley guard 1, the upper pulley guard 7, and the flywheel guard 2 is reduced, while the accumulation of dust and foreign objects is decreased, maintaining good ventilation performance. The application of perforated structures or perforated plates not only improves the protective effect of the guards but also reduces the risk of damage to the drive belt due to foreign object intrusion. Compared with existing technologies, this technical solution simplifies the structure of the guards while ensuring protective performance, and improves the operational safety and maintenance convenience of the equipment.

[0041] Furthermore, this application proposes that multiple support legs include a first support leg 4, a second support leg 5, and a third support leg 6. The first support leg 4 and the second support leg 5 respectively support the two ends of the pulley lower guard 1, and the third support leg 6 supports the flywheel guard 2. Specifically, the first support leg 4 and the second support leg 5 are fixedly connected to the two ends of the pulley lower guard 1 by bolts or other fasteners to ensure the stability of the pulley lower guard 1 during operation. The third support leg 6 is fixed to the flywheel guard 2 by welding or bolting to enhance the support strength of the flywheel guard 2. As a preferred embodiment, the support legs (first support leg 4, second support leg 5, and third support leg 6) can be made of high-strength steel with a thickness of 5-10mm to improve the load-bearing capacity and durability of the support legs. In addition, anti-slip pads or fixed bases can be provided at the bottom of the support legs to enhance the friction between the support legs and the ground and prevent the guard from shifting during vibration. Therefore, this application solves the technical problems of unclear support structure and unstable support by clearly defining the number and distribution of the outriggers (first outrigger 4, second outrigger 5, and third outrigger 6). The first outrigger 4 and second outrigger 5 support the two ends of the pulley lower guard 1 respectively, ensuring the stability of the pulley lower guard 1; the third outrigger 6 supports the flywheel guard 2, ensuring the stability of the flywheel guard 2. This distribution makes the overall structure of the guard more stable, effectively coping with the vibration and impact generated by the jaw crusher 14 during operation, improving the protective effect and service life. Compared with the prior art, the outrigger design of this application not only simplifies the installation process but also improves the versatility and maintenance efficiency of the guard, demonstrating significant practicality and innovation.

[0042] Furthermore, this application proposes that the lower pulley guard 1, the upper pulley guard 7, and the flywheel guard 2 are made of high-strength steel plates with a thickness of 5-10mm. Specifically, the selection of high-strength steel plates ensures the structural strength and durability of the guards in harsh environments, effectively resisting external impacts and vibrations, and preventing deformation or damage to the guards. The 5-10mm thickness further enhances the rigidity of the guards, maintaining their stability and protective effect during long-term use. As a preferred embodiment, the high-strength steel plates can be common high-strength steels such as Q345B or Q235B, which have good mechanical properties and corrosion resistance, and are suitable for working environments with high dust and vibration. Through this material selection and thickness design, the transmission guards can provide reliable protection in environments with high dust and vibration, extending their service life. For example, in the actual application of the jaw crusher 14, the guards can effectively block the intrusion of foreign objects such as gravel and metal fragments, protecting the transmission belt and flywheel.

[0043] 12 is not damaged, and safety hazards to operators are reduced. Therefore, the technical solution of this application not only solves the problems of insufficient strength and easy deformation of the existing protective cover structure, but also improves the durability and protective effect of the protective cover, providing a strong guarantee for the stable operation of the jaw crusher 14.

[0044] Example 2:

[0045] like Figure 3 As shown, this embodiment also proposes a jaw crusher, including the transmission guard described in Embodiment 1. The lower pulley guard 1 and the upper pulley guard 7 of the transmission guard are fixed to both sides of the jaw crusher body 14 by support legs (first support leg 4, second support leg 5, and third support leg 6), and the belt guard and flywheel guard 2 cover the outside of the transmission belt and flywheel 12 of the jaw crusher 14. The lower pulley guard 1 and the upper pulley guard 7 are fixed to both sides of the jaw crusher body 14 by support legs (first support leg 4, second support leg 5, and third support leg 6), ensuring the stability and protective effect of the guard. Simultaneously, the belt guard and flywheel guard 2 cover the outside of the transmission belt and flywheel 12 of the jaw crusher 14, effectively preventing foreign object intrusion and belt damage, improving the safety and service life of the equipment. Furthermore, this design simplifies the installation and maintenance process of the guard and improves operating efficiency.

[0046] The technical solution of this application solves the problem of protecting the transmission belt and flywheel 12 of the jaw crusher 14 in harsh environments by adopting a transmission guard. Compared with the prior art, the technical solution of this application has the following advantages: First, the lower guard 1 and upper guard 7 of the pulley are fixed by the support legs (first support leg 4, second support leg 5 and third support leg 6), ensuring the stability and protective effect of the guards; second, the belt guard and flywheel guard 2 cover the outside of the transmission belt and flywheel 12, effectively preventing foreign objects from entering and belt damage, improving the safety and service life of the equipment; finally, the installation and maintenance process of the guards is simplified, improving operating efficiency. Therefore, the technical solution of this application has significant advantages in solving practical technical problems. In the description of this specification, the 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 connection with that embodiment or example are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A transmission guard for a jaw crusher, characterized in that, include: Belt guard and flywheel guard (2). - The belt cover includes a lower pulley cover (1) and an upper pulley cover (7), and the lower pulley cover (1) and the upper pulley cover (7) are fixedly connected to form a split upper and lower structure; - Multiple legs for supporting the belt guard and flywheel guard (2); - Connecting plate (3), used to connect the belt guard and the flywheel guard (2); The top of the pulley upper cover (7) and the top of the flywheel cover (2) are fixedly connected by a connecting plate (3); The top of the pulley cover (7) and the top of the flywheel cover (2) are both provided with connecting seats (8). The two ends of the connecting plate (3) are respectively connected to the connecting seats (8), and the connecting plate (3) can be adjusted relative to the connecting seats (8) to adapt to the distance between the driven pulley (11) and the flywheel (12).

2. The transmission guard for a jaw crusher according to claim 1, characterized in that, The lower pulley cover (1) and the upper pulley cover (7) are symmetrically arranged with the axis connecting the driving pulley and the driven pulley (11) as the center line; wherein, the inner cavity of the belt cover formed by the combination of the lower pulley cover (1) and the upper pulley cover (7) is constructed as an irregular cavity that is narrow at one end and wide at the other end.

3. A transmission guard for a jaw crusher according to claim 1, characterized in that, Angle steel (13) is provided on the upper edge of the pulley lower guard (1) and the lower edge of the pulley upper guard (7). At least one side of the two angle steels (13) are attached together and fixed by bolts.

4. A transmission guard for a jaw crusher according to claim 1, characterized in that, One of the ends of the connecting seat (8) and the connecting plate (3) is provided with a connecting hole (9) and the other is provided with a strip hole (10); the connecting hole (9) and the strip hole (10) are fixedly connected by a screw fastener, and the positions of the connecting plate (3) and the connecting seat (8) are adjusted based on the position of the screw fastener relative to the strip hole (10).

5. A transmission guard for a jaw crusher according to claim 1, characterized in that, The pulley lower guard (1), pulley upper guard (7) and / or flywheel guard (2) are provided with through holes, which are hollow structures or have perforated plates.

6. A transmission guard for a jaw crusher according to claim 1, characterized in that, The plurality of support legs include a first support leg (4), a second support leg (5) and a third support leg (6). The first support leg (4) and the second support leg (5) support the two ends of the pulley lower guard (1) respectively, and the third support leg (6) supports the flywheel guard (2).

7. A transmission guard for a jaw crusher according to claim 1, characterized in that, The pulley lower guard (1), pulley upper guard (7) and flywheel guard (2) are made of high-strength steel plate with a thickness of 5-10mm.

8. A jaw crusher, characterized in that, The transmission cover includes any one of claims 1-7, wherein the lower pulley cover (1) and the upper pulley cover (7) of the transmission cover are fixed to both sides of the jaw crusher body (14) by the support legs, and the belt cover and the flywheel cover (2) cover the outside of the transmission belt and flywheel (12) of the jaw crusher.

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