Tensioning and fixing device for fixed jaw plate of jaw crusher

Abstract

The utility model relates to the technical field of jaw crushers, in particular to a tensioning and fixing device for a fixed jaw plate of a jaw crusher, which is characterized by comprising two tensioning and fixing components which are symmetrically arranged on two sides between a front frame and a boss of the fixed jaw plate, the tensioning fixing assembly comprises a wedge-shaped seat, a first wedge block, a second wedge block and a tensioning driving mechanism, the wedge-shaped seat is fixedly arranged at the upper end of the front frame, a first upper slope and a second upper slope are arranged on the two sides of the upper end of the wedge-shaped seat respectively, a first lower slope is arranged at the lower end of the first wedge block, and a second lower slope is arranged at the lower end of the second wedge block; the tensioning driving mechanism is used for driving the first wedge block and the second wedge block to slide oppositely. According to the utility model, four tensioning positions can be formed between the front frame and the boss of the fixed jaw plate, and the tensioning contact area is greatly increased, so that stronger tensioning force is provided, the fixed jaw plate can be effectively and stably tensioned and fixed, the stability of the fixed jaw plate in the crushing work is effectively ensured, and the fixed jaw plate is not easy to loosen.

Description

Technical Field

[0001] This utility model relates to the field of jaw crusher technology, specifically to a tensioning and fixing device for the fixed jaw plate of a jaw crusher. Background Technology

[0002] Jaw crushers are mainly used for primary crushing, breaking materials to a size suitable for conveyor belt transport to the next stage of crushing. They have a wide range of applications. The main wear parts of a jaw crusher are the jaw plates, which are divided into fixed jaw plates and movable jaw plates. The movable jaw plate is mounted on the movable jaw frame and performs a reciprocating swing motion together with the fixed jaw plate, forming an angle with it to crush the stones. Therefore, the jaw plates are relatively easy to damage and require regular replacement. If wear is not addressed promptly, it can lead to damage to the jaw crusher itself, causing significant losses. Due to the crushing characteristics of jaw crushers... The wear rate of the fixed jaw plate is approximately twice that of the movable jaw plate, resulting in a replacement cycle that is twice that of the movable jaw plate. Therefore, the ability to quickly replace the fixed jaw plate is of paramount importance. However, some existing tensioning devices provide only moderate tension force when tensioning and fixing the fixed jaw plate, making it difficult to stably tension and secure the plate. This leads to relatively poor stability of the fixed jaw plate during crushing operations, making it prone to loosening and causing damage to the equipment. Consequently, the stability and efficiency of the jaw crusher during operation are affected. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tensioning and fixing device for the fixed jaw plate of a jaw crusher, which can form four tensioning positions between the front frame and the boss of the fixed jaw plate, greatly increasing the tensioning contact area, thereby providing a stronger tensioning force, effectively and stably tensioning and fixing the fixed jaw plate, effectively ensuring the stability of the fixed jaw plate in the crushing operation, and preventing loosening.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A tensioning and fixing device for the fixed jaw plate of a jaw crusher includes two tensioning and fixing components arranged symmetrically on both sides between the front frame and the boss of the fixed jaw plate. The tensioning and fixing components include a wedge seat, a first wedge, a second wedge, and a tensioning drive mechanism. The wedge seat is fixedly mounted on the upper end of the front frame. The upper end of the wedge seat has a first upper inclined surface and a second upper inclined surface arranged symmetrically on both sides, which are inclined downward and outward. The first wedge is mounted on the first upper inclined surface, and the second wedge is mounted on the second upper inclined surface. The lower end of the first wedge has a first lower inclined surface that fits and slides with the first upper inclined surface, and the lower end of the second wedge has a second lower inclined surface that fits and slides with the second upper inclined surface. The tensioning drive mechanism is used to drive the first wedge and the second wedge to slide towards each other to increase the distance between the upper end surface of the first wedge and the upper end surface of the second wedge and the upper end surface of the front frame.

[0005] Furthermore, the tensioning drive mechanism includes a screw, a locking nut, and a sleeve. The first wedge has a smooth hole, and the second wedge has a threaded hole. The locking nut, sleeve, first wedge, and second wedge are sequentially sleeved on the screw from the outside to the inside. The locking nut and second wedge are threadedly connected to the screw, and the sleeve and first wedge are slidably connected to the screw. A limiting component is provided between the wedge seat and the screw to limit the circumferential rotation of the screw.

[0006] Furthermore, the limiting component includes a matching limiting block and a limiting groove. The limiting block is fixedly located in the middle of the screw, and the limiting groove is located at the upper end of the wedge-shaped seat. The limiting block is embedded in the limiting groove and the two slide together.

[0007] Furthermore, the limiting block and the screw are coaxially arranged, and the screw has shoulders formed at both ends of the limiting block.

[0008] Furthermore, the first and second upper inclined surfaces of the wedge seat are provided with strip grooves, and the first lower inclined surface of the first wedge block and the second lower inclined surface of the second wedge block are fixedly provided with strip sliders that are adapted to the strip grooves. The strip sliders are embedded in the strip grooves and the two slide together.

[0009] Furthermore, the strip groove is connected to the limiting groove.

[0010] Furthermore, there are two locking nuts, and a flat washer is fitted on the screw between the locking nut and the sleeve.

[0011] Furthermore, it also includes a protective cover for covering one end of the screw. The protective cover is installed on the side plate of the frame, and the side plate of the frame has a through hole through which one end of the screw can pass.

[0012] Furthermore, it also includes an annular pressure plate for pressing down and fixing the protective cover, which is fixed to the side plate of the frame by bolts.

[0013] Furthermore, a positioning block is detachably installed on the upper end of the front frame between the two tensioning and fixing components. The protrusion of the fixed jaw plate is provided with a positioning groove that matches the limiting block, and the positioning block is embedded in the positioning groove.

[0014] As described above, the tensioning and fixing device for the fixed jaw plate of a jaw crusher provided by this utility model has the following beneficial effects: By setting two tensioning and fixing components, firstly, two first wedges and two second wedges are provided on both sides between the front frame and the boss of the fixed jaw plate, forming four tensioning positions between the front frame and the boss of the fixed jaw plate. This greatly increases the tensioning contact area, thereby providing a stronger tensioning force. This effectively and stably tensions and fixes the fixed jaw plate, ensuring its stability during crushing operations, preventing loosening, avoiding equipment damage, effectively improving the stability and working efficiency of the jaw crusher, and reducing subsequent maintenance costs and extending equipment service life. Secondly, the positioning block facilitates rapid positioning of the fixed jaw plate during installation and also limits its movement in the left and right directions, further ensuring the stability and reliability of the fixed jaw plate during installation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a tensioning and fixing device for the fixed jaw plate of a jaw crusher according to the present invention.

[0016] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0017] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle.

[0018] Figure 4 This is a schematic diagram of the structure of a tensioning and fixing device for the fixed jaw plate of a jaw crusher according to the present invention.

[0019] Figure 5 for Figure 4 A magnified view of a portion of point C.

[0020] In the diagram: 1-Front frame; 2-Jaw plate; 21-Boss; 211-Positioning groove; 3-Tensioning and fixing assembly; 31-Wedge seat; 311-First upper inclined surface; 312-Second upper inclined surface; 313-Limiting groove; 314-Strip groove; 32-First wedge block; 321-First lower inclined surface; 322-Strip slider; 33-Second wedge block; 331-Second lower inclined surface; 34-Tensioning drive mechanism; 341-Screw; 3411-Limiting block; 3412-Shoulder; 342-Locking nut; 343-Sleeve; 344-Flat washer; 41-Protective cover; 42-Annular pressure plate; 5-Frame side plate; 51-Through hole; 6-Positioning block. Detailed Implementation

[0021] The present invention will be further described below through specific embodiments.

[0022] like Figures 1 to 5 As shown, the present invention discloses a tensioning and fixing device for a jaw crusher fixed jaw plate, comprising two tensioning and fixing components 3 symmetrically arranged on both sides between the boss 21 of the front frame 1 and the fixed jaw plate 2. Each tensioning and fixing component 3 includes a wedge seat 31, a first wedge block 32, a second wedge block 33, and a tensioning drive mechanism 34. The wedge seat 31 is fixedly disposed on the upper end of the front frame 1. The upper end of the wedge seat 31 has a first upper inclined surface 311 and a second upper inclined surface 312 symmetrically arranged and inclined downwards and outwards on both sides. The first wedge block 32 is disposed on the first upper inclined surface 311. The second wedge 33 is disposed on the second upper inclined surface 312. The lower end of the first wedge 32 is provided with a first lower inclined surface 321 that fits and slides with the first upper inclined surface 311. The lower end of the second wedge 33 is provided with a second lower inclined surface 331 that fits and slides with the second upper inclined surface 312. The tensioning drive mechanism 34 is used to drive the first wedge 32 and the second wedge 33 to slide towards each other to increase the distance between the upper end surface of the first wedge 32 and the upper end surface of the second wedge 33 and the upper end surface of the front frame 1, thereby achieving tensioning and fixing of the fixed jaw plate 2.

[0023] With the two tensioning and fixing components 3, the first wedge 32 and the second wedge 33 are provided on both sides between the front frame 1 and the boss 21 of the fixed jaw plate 2. That is, there are two of each of the first wedge 32 and the second wedge 33, so that four tensioning positions are formed between the front frame 1 and the boss 21 of the fixed jaw plate 2, which greatly increases the tensioning contact area and provides a stronger tensioning force. This can effectively and stably tension and fix the fixed jaw plate 2, effectively ensuring the stability of the fixed jaw plate 2 in the crushing operation, preventing loosening, avoiding damage to the equipment, effectively improving the stability and working efficiency of the jaw crusher, and helping to reduce subsequent maintenance costs and extend the service life of the equipment.

[0024] The tensioning drive mechanism 34 includes a screw 341, a locking nut 342, and a sleeve 343. The first wedge 32 has a smooth hole, and the second wedge 33 has a threaded hole. The locking nut 342, sleeve 343, first wedge 32, and second wedge 33 are sequentially sleeved onto the screw 341 from the outside in. The locking nut 342 and second wedge 33 are threadedly connected to the screw 341, and the sleeve 343 and first wedge 32 are slidably connected to the screw 341. A wedge seat 31 is provided between the wedge and the screw 341 for adjusting the tension. The circumferential rotation of the screw 341 serves as a limiting component. Thus, by rotating and tightening the locking nut 342 with a wrench, the sleeve 343 pushes the first wedge 32 upward along the first upper inclined surface 311 of the wedge seat 31 and slides towards the second wedge 33. Simultaneously, the screw 341 moves axially, pulling the second wedge 33 upward along the second upper inclined surface 312 of the wedge seat 31 and towards the first wedge 32, thereby achieving tensioning and fixing of the fixed jaw plate 2. The overall operation is simple, practical, and reliable.

[0025] The limiting component includes a matching limiting block 3411 and a limiting groove 313. The limiting block 3411 is fixedly disposed in the middle of the screw 341, and the limiting groove 313 is disposed at the upper end of the wedge seat 31. The limiting block 3411 is embedded in the limiting groove 313 and the two slide together. In this way, when the locking nut 342 is rotated, the screw 341 is prevented from rotating along with it, so as to ensure the smooth progress of the tensioning process.

[0026] Furthermore, the limiting block 3411 is coaxially arranged with the screw 341. The screw 341 has shoulders 3412 formed at both ends of the limiting block 3411. With the setting of the shoulders 3412, when it is necessary to disassemble the fixed jaw plate 2, the shoulders 3412 can press against the first wedge 32, and under the action of external force, push the first wedge 32 away from its original position and loosen the first wedge 32, so that the fixed jaw plate 2 can be disassembled smoothly in the future.

[0027] The first upper inclined surface 311 and the second upper inclined surface 312 of the wedge seat 31 are each provided with a strip groove 314. The first lower inclined surface 321 of the first wedge block 32 and the second lower inclined surface 331 of the second wedge block 33 are each fixedly provided with a strip slider 322 adapted to the strip groove 314. The strip slider 322 is embedded in the strip groove 314 and the two slide together. In this way, the strip slider 322 and the strip groove 314 can play a corresponding guiding role in the movement of the first wedge block 32 and the second wedge block 33, so as to ensure the stability of the first wedge block 32 and the second wedge block 33 when moving, which is conducive to improving the stability of the first wedge block 32 and the second wedge block 33 in position adjustment and crushing operation. In addition, the strip groove 314 communicates with the limiting groove 313.

[0028] Preferably, there are two locking nuts 342, which can play a certain role in preventing loosening. A flat washer 344 is sleeved on the screw 341 between the locking nut 342 and the sleeve 343.

[0029] In addition, it includes a protective cover 41 for covering one outer end of the screw 341 and an annular pressure plate 42 for pressing and fixing the protective cover 41. The protective cover 41 is installed on the side plate 5 of the frame. The side plate 5 of the frame is provided with a through hole 51 through which one outer end of the screw 341 can pass. The annular pressure plate 42 is locked and fixed to the side plate 5 of the frame by bolts, thereby providing corresponding protection for the screw 341.

[0030] In addition, a positioning block 6 is detachably installed on the upper end of the front frame 1 between the two tensioning and fixing components 3. The positioning block 6 is bolted to the front frame 1. The boss 21 of the fixed jaw plate 2 is provided with a positioning groove 211 that matches the limiting block 3411. The positioning block 6 is embedded in the positioning groove 211, which facilitates the rapid positioning of the fixed jaw plate 2 during installation. At the same time, it can also limit the movement of the fixed jaw plate 2 in the left and right directions to further ensure the stability and reliability of the fixed jaw plate 2 during installation.

[0031] The method of using the tensioning and fixing device for the fixed jaw plate of a jaw crusher described in this utility model is as follows:

[0032] When it is necessary to disassemble the fixed jaw plate 2, first remove the protective covers 41 on both sides of the jaw crusher, then remove the positioning block 6 from the upper end of the front frame 1 and take it out from the positioning groove 211 of the fixed jaw plate 2. Use a wrench to loosen the locking nuts 342 on the two screws 341, and then remove the locking nuts 342, flat washers 344 and sleeves 343 in sequence. Then, with the assistance of disassembly and assembly tools such as hammers and hammers, first install the hammer nut on the outer end of one of the screws 341. Then, use a hammer to strike the hammer nut, causing the screw 341 to move inward and drive the second wedge 33 to move to one side of the positioning groove 211 until it is in the positioning groove 211. There is enough space in the positioning groove 211 to accommodate the second wedge 33. At this time, the limiting block 3411 on the screw 341 is disengaged from the limiting groove 313 of the wedge seat 31. Then, rotate the screw 341 so that the second wedge 33 moves out of the screw. Separating from rod 341, the second wedge 33 on one of the screws 341 can be removed first. Then, the striking nut is installed on the outer end of the other screw 341, and a hammer is used to strike it. This process is repeated to remove the second wedge 33 on the other screw 341. Next, an auxiliary rod is placed between the two screws 341, and the striking nut on one of the screws 341 is struck with a hammer. Through the transmission of the auxiliary rod, the shoulder 3412 on the other screw 341 abuts against the first wedge 32 on the corresponding side, and the hammering continues. This causes the first wedge 32 on the other screw 341 to loosen outward and leave its original position. Then, the striking nut on the other screw 341 is struck with a hammer again, which similarly causes the first wedge 32 on one of the screws 341 to loosen outward and leave its original position. Thus, the fixed jaw plate 2 can be disassembled and replaced.When installing a new fixed jaw plate 2, first ensure the mounting areas on both sides of the upper end of the front frame 1 are clean. Apply lubricant, such as anti-copper corrosion grease, to the first upper inclined surface 311, the second upper inclined surface 312, the first lower inclined surface 321 of the first wedge block 32, and the second lower inclined surface 331 of the second wedge block 33 of the wedge seat 31. This will facilitate future removal. Then, assemble the two tensioning and fixing components 3. Place the locking nut 342, flat washer 344, sleeve 343, first wedge block 32, and second wedge block 33 onto the screw 341 from the outside in, and place them at the two wedge seats 31 at the upper end of the front frame 1. After the preparation is complete, install the positioning block 6 at the corresponding position on the upper end of the front frame 1. The jaw plate 2 is hoisted and positioned, ensuring that the positioning groove 211 on the jaw plate 2 is embedded in the positioning block 6, and that the two tensioning and fixing components 3 are positioned on both sides between the front frame 1 and the boss 21 of the jaw plate 2, keeping the jaw plate 2 suspended. Then, the locking nuts 342 on the two tensioning and fixing components 3 are simultaneously tightened from both sides of the jaw crusher, so as to drive the first wedge 32 and the second wedge 33 on the two tensioning and fixing components 3 to slide towards each other, thereby increasing the distance between the upper end face of the first wedge 32 and the upper end face of the second wedge 33 and the upper end face of the front frame 1, thereby achieving tensioning and fixing of the jaw plate 2. Afterwards, the protective cover 41 is installed on the side plate 5 of the frame and covers one end of the outer side of the screw 341.

[0033] The above are only some specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A tensioning and fixing device for the fixed jaw plate of a jaw crusher, characterized in that: The device includes two tensioning and fixing assemblies symmetrically arranged on both sides between the bosses of the front frame and the fixed jaw plate. Each tensioning and fixing assembly includes a wedge seat, a first wedge, a second wedge, and a tensioning drive mechanism. The wedge seat is fixedly disposed on the upper end of the front frame. The upper end of the wedge seat has a first upper inclined surface and a second upper inclined surface symmetrically arranged on both sides, which are inclined downward and outward. The first wedge is disposed on the first upper inclined surface, and the second wedge is disposed on the second upper inclined surface. The lower end of the first wedge has a first lower inclined surface that fits and slides with the first upper inclined surface, and the lower end of the second wedge has a second lower inclined surface that fits and slides with the second upper inclined surface. The tensioning drive mechanism is used to drive the first wedge and the second wedge to slide towards each other to increase the distance between the upper end surfaces of the first wedge and the second wedge and the upper end surface of the front frame.

2. The tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 1, characterized in that: The tensioning drive mechanism includes a screw, a locking nut, and a sleeve. The first wedge has a smooth hole, and the second wedge has a threaded hole. The locking nut, the sleeve, the first wedge, and the second wedge are sequentially sleeved on the screw from the outside to the inside. The locking nut and the second wedge are threadedly connected to the screw, and the sleeve and the first wedge are slidably connected to the screw. A limiting component is provided between the wedge seat and the screw to limit the circumferential rotation of the screw.

3. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 2, characterized in that: The limiting component includes a matching limiting block and a limiting groove. The limiting block is fixedly disposed in the middle of the screw, and the limiting groove is disposed at the upper end of the wedge-shaped seat. The limiting block is embedded in the limiting groove and the two slide together.

4. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 3, characterized in that: The limiting block is coaxially arranged with the screw, and the screw has shoulders formed at both ends of the limiting block.

5. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 3, characterized in that: The first and second upper inclined surfaces of the wedge seat are provided with strip-shaped grooves, and the first lower inclined surface of the first wedge block and the second lower inclined surface of the second wedge block are fixedly provided with strip-shaped sliders that are adapted to the strip-shaped grooves. The strip-shaped sliders are embedded in the strip-shaped grooves and the two slide together.

6. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 5, characterized in that: The strip groove communicates with the limiting groove.

7. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 2, characterized in that: There are two locking nuts, and a flat washer is fitted on the screw between the locking nut and the sleeve.

8. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 2, characterized in that: It also includes a protective cover for covering one outer end of the screw, the protective cover being mounted on the side plate of the frame, the side plate of the frame having a through hole through which one outer end of the screw can pass.

9. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 8, characterized in that: It also includes an annular pressure plate for pressing and fixing the protective cover, the annular pressure plate being fixed to the side plate of the frame by bolts.

10. A tensioning and fixing device for the fixed jaw plate of a jaw crusher according to claim 3, characterized in that: The upper end of the front frame is detachably mounted with a positioning block between the two tensioning and fixing components. The protrusion of the fixed jaw plate is provided with a positioning groove that matches the limiting block, and the positioning block is embedded in the positioning groove.

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