Jaw crusher tooth plate fastening device and dismounting tool

Abstract

The application provides a jaw crusher tooth plate fastening device and dismounting tool, and relates to the technical field of jaw crushers. The device comprises a tooth plate, a rack, a moving jaw, a wedge block and a tensioning assembly. The tooth plate is of a symmetrical structure. The rack and the lower part of the moving jaw are provided with bosses. The wedge block is arranged on the inner side of the tooth plate. The tooth plate is clamped and fixed by tensioning the wedge block through the tensioning assembly. The dismounting tool is provided with a limiting block and a dismounting hole, and the wedge block can be pulled to release the inclined surface cooperation. The application can reduce the operation and maintenance cost of the equipment, improve the dismounting efficiency of the tooth plate and ensure the continuous and stable operation of the crusher.

Description

Technical Field

[0001] This invention relates to the field of jaw crusher technology, specifically to a jaw crusher tooth plate fastening device and disassembly tooling. Background Technology

[0002] Currently, jaw crushers are widely used in mining, building aggregate production, metallurgy, chemical and other industries. Their main function is to perform coarse and medium crushing of various ores and large materials. They can crush raw materials to the required particle size and are an indispensable primary crushing equipment in crushing and screening production lines.

[0003] During operation, the motor drives the moving jaw to swing back and forth through the pulley and eccentric shaft. The material is squeezed, split and crushed between the moving and stationary jaw plates, and discharged from the bottom discharge port after reaching a certain particle size requirement.

[0004] As a core wear part in the crushing process, the toothed plate needs to be replaced after a period of wear. The current mainstream installation and fastening method is wedge tensioning, which includes an upper fastening block 1, a pad block 5, a tensioning assembly 4, and a lower fastening block 2. The toothed plate 3 has grooves machined on the upper and lower sides. The installation method is as follows: First, insert the lower fastening block into the slot of the frame. Then, hoist the toothed plate and place it above the lower fastening block and close to the frame surface. At this time, the lower groove of the toothed plate and the lower fastening block fit together. Next, insert the pad block into the groove of the toothed plate. Insert the upper fastening block into the inclined opening between the frame and the toothed plate. Finally, use the tensioning assembly to tension the upper fastening block. Under the action of the inclined surface, the toothed plate will be clamped and fixed.

[0005] The above structure has the following problems: First, when raw materials enter the crusher for crushing, they collide with the upper fastening blocks. After prolonged operation, the upper fastening blocks will wear down along with the toothed plates, requiring periodic replacement, which causes unnecessary waste and increases operating costs. Second, the fastening toothed plates require the installation of multiple parts, all of which have inclined surfaces, resulting in numerous machining surfaces and higher costs. Third, during toothed plate replacement, even though the tensioning assembly is disassembled, the inclined surfaces of the upper fastening blocks, pads, and lower fastening blocks cannot be loosened due to pre-tightening force. In practice, they are often loosened by manual knocking before the toothed plates can be removed.

[0006] Common solutions to the above problems include: changing the material of the upper fastening block or preparing it together with the toothed plate to solve the wear problem of the upper fastening block; and solving the problem of the toothed plate jamming by drilling holes in the frame and adding an ejector cylinder.

[0007] The above measures have drawbacks: changing the upper fastening block to a wear-resistant material will increase material costs, and the increased material hardness will also make processing more difficult; adding an ejector cylinder will lead to more accessories, such as oil pipes, oil pumps, motors, etc., and the cost will increase with the increased configuration, and there is no installation space behind the moving jaw tooth plate.

[0008] In summary, this patent provides a toothed plate fastening device and disassembly tool that meets the requirements for toothed plate fastening, reduces maintenance costs, and is easy to operate, enabling the crusher to operate continuously, efficiently, and stably. Summary of the Invention

[0009] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a jaw crusher tooth plate fastening device and disassembly fixture, thereby reducing equipment operation and maintenance costs, improving tooth plate disassembly and assembly efficiency, and ensuring the continuous and stable operation of the crusher.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A jaw crusher tooth plate fastening device includes a tooth plate, a frame, a movable jaw, a wedge, and a tensioning assembly. The tooth plate has mounting inclined surfaces at both its upper and lower ends, and mounting holes on its inner side. The tooth plate has a symmetrical upper and lower structure. The tooth plate includes a stationary jaw tooth plate and a movable jaw tooth plate. The stationary jaw tooth plate corresponding to the frame has mounting inclined surfaces, mounting holes, and a lower boss, with a mounting inclined surface on the top surface of the lower boss. The movable jaw tooth plate corresponding to the movable jaw has mounting inclined surfaces, mounting holes, and a lower boss, with a mounting inclined surface on the top surface of the lower boss. The wedge has mounting inclined surfaces on both sides, and a mounting... It has mounting holes and threaded holes. The mounting slope of the lower part of the stationary jaw plate fits into the mounting slope of the lower boss of the frame. The mounting slope of the lower part of the movable jaw plate fits into the mounting slope of the lower boss of the movable jaw. The wedge is set in the gap between the inner side of the tooth plate and the corresponding base. The mounting slopes on both sides of the wedge fit into the upper mounting slope of the tooth plate and the mounting slope of the corresponding base, respectively. The tensioning assembly passes through the mounting hole of the corresponding base and the mounting hole of the tooth plate. The end of the tensioning assembly is connected to the wedge. The tensioning assembly applies tension to the wedge, so that the tooth plate is clamped and fixed on the corresponding base.

[0012] Preferably, the tensioning assembly includes a threaded rod, a nut, and a long sleeve. The long sleeve is a welded structure, with a mounting base at the bottom and a washer at the top. The threaded rod passes through the inside of the long sleeve, with one end connected to a wedge and the other end threadedly engaged with the nut.

[0013] Preferably, the toothed plate has weight-reduction holes on its body.

[0014] Preferably, the toothed plate, frame, and moving jaw are all integrally cast structures.

[0015] Preferably, the wedge has multiple threaded holes, which are arranged symmetrically about the axis of the mounting hole of the wedge.

[0016] A disassembly fixture for a jaw crusher tooth plate fastening device is provided. The disassembly fixture is a welded structure, including a limiting block and several disassembly holes. The shape of the limiting block is adapted to the tooth groove shape of the tooth plate, and the arrangement of the several disassembly holes corresponds one-to-one with the arrangement of several threaded holes on the wedge.

[0017] Preferably, the corners of the limiting block are rounded.

[0018] Preferably, the shape of the limiting block is adapted to the tooth groove shape of both the stationary jaw tooth plate and the moving jaw tooth plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention arranges all fastening structures, such as wedges, on the inner side of the toothed plate. During the crushing process, the material will not directly impact the fastening components, which can effectively prevent the wedges from being eroded and bumped by the material and causing abnormal wear. The fastening components can be repeatedly recycled, reducing the frequency of replacement of fastening parts, reducing the consumption of spare parts, and effectively reducing the overall operation and maintenance cost of the crusher.

[0021] The toothed plate is designed with a symmetrical structure. After the working surface of one side of the toothed plate wears, the toothed plate can be reversed and reinstalled to continue participating in the crushing operation. This makes full use of the toothed plate material, improves the overall utilization rate of the toothed plate, reduces the consumption of toothed plate spare parts, and lowers the user's consumable procurement costs.

[0022] The gear plate, frame, and moving jaw are integrally cast, and the mounting bevels and mounting holes are directly machined on the casting body. Compared with the traditional structure, this reduces the number of independent fasteners and the number of multiple bevel mating machining processes caused by multiple parts, simplifying the parts machining process and reducing the machining difficulty of parts and the overall manufacturing cost.

[0023] This invention features a dedicated disassembly fixture that engages with the threaded holes on the wedge. During disassembly, the wedge can be directly pulled to release the pre-tightened engagement on the inclined surface, eliminating the traditional method of loosening parts by manual hammering. This avoids the risk of damage to parts caused by hammering and reduces the difficulty of disassembling and assembling the jaw plate. This disassembly fixture is compatible with both the moving and stationary jaw plates, allowing one set of fixtures to complete the disassembly and assembly of both plates. This reduces the types of tools required, shortens equipment downtime for maintenance, and improves on-site maintenance efficiency.

[0024] The tensioning assembly features a long sleeve structure, which protects the internal threaded tie rod, preventing rainwater and dust from directly impacting its surface, reducing corrosion, preventing jamming, and facilitating later disassembly and assembly. When tensioned, the tie rod undergoes elastic deformation, outputting a stable preload. Even under continuous vibration conditions during crusher operation, the tensioning assembly is less prone to loosening, ensuring stable clamping of the jaw plates and guaranteeing continuous and reliable operation of the crusher.

[0025] Weight reduction holes are opened in the tooth plate body to reduce the weight of the tooth plate itself while ensuring the structural strength of the tooth plate, thereby reducing the workload of hoisting and handling the tooth plate. At the same time, it can also reduce the amount of material used in the tooth plate casting, further controlling the manufacturing cost of the tooth plate. Attached Figure Description

[0026] Figure 1 A schematic diagram of the existing installation and fastening structure;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the toothed plate in this invention;

[0029] Figure 4 This is a schematic diagram of the frame structure in this invention;

[0030] Figure 5 This is a schematic diagram of the movable jaw structure in this invention;

[0031] Figure 6 This is a schematic diagram of the wedge block in the present invention;

[0032] Figure 7 This is a schematic diagram of the mounting holes for the wedge block in this invention;

[0033] Figure 8 This is a schematic diagram of the structure of the long sleeve in this invention;

[0034] Figure 9 This is a schematic diagram of the disassembly and assembly tool in this invention;

[0035] Figure 10 This is a schematic diagram illustrating the installation of the disassembly and assembly tools in this invention;

[0036] Figure 11 This is a schematic diagram showing the usage state of the disassembly and assembly tools in this invention.

[0037] in:

[0038] 1. Upper fastening block; 2. Lower fastening block; 3. Tooth plate; 31. Weight reduction hole; 32. First mounting ramp; 4. Tensioning assembly; 5. Pad; 6. Wedge; 61. Fourth mounting ramp; 62. Fourth mounting hole; 7. Moving jaw; 701. Third boss; 702. Third mounting ramp; 703. Third mounting hole; 8. Moving jaw tooth plate; 9. Stationary jaw tooth plate; 10. Frame; 101. Second mounting ramp; 102. Second mounting hole; 103. Second boss; 11. Long sleeve; 12. Washer; 13. Mounting base; 14. Disassembly and assembly tools; 141. Disassembly and assembly hole; 142. Limit block. Detailed Implementation

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] like Figures 1 to 11 As shown, a jaw crusher tooth plate fastening device is mainly used for the installation and fixing of the jaw crusher tooth plate 3. The jaw crusher tooth plate 3 fastening device includes tooth plate 3, tensioning assembly 4, frame 10, moving jaw 7 and wedge block 6. The tooth plate 3 includes stationary jaw tooth plate 9 and moving jaw tooth plate 8.

[0041] The toothed plate 3 has a symmetrical structure with upper and lower parts. The toothed plate 3 has weight reduction holes 31. The upper and lower parts of the toothed plate 3 are respectively machined with mounting slopes (first mounting slope 32) and mounting holes. The frame 10 and the moving jaw 7 are integrally cast. The frame 10 and the moving jaw 7 are provided with bosses at the bottom. The surface of the bosses is machined with mounting slopes. The frame 10 and the moving jaw 7 are also machined with mounting slopes and mounting holes (the mounting slope of the frame 10 corresponds to the second mounting slope 101 in the figure, the mounting hole corresponds to the second mounting hole 102 in the figure, and the boss corresponds to the second boss 103 in the figure; the mounting slope of the moving jaw 7 corresponds to the third mounting slope 702 in the figure, the boss corresponds to the third boss 701 in the figure, and the mounting hole corresponds to the third mounting hole 703 in the figure). The wedge 6 is machined with mounting slope, mounting hole and multiple threaded holes. The mounting slope on both sides of the wedge 6 can respectively achieve inclined surface fit with the mounting slope on the upper part of the tooth plate 3, the mounting slope of the frame 10 or the moving jaw 7 (the mounting slope of the wedge 6 corresponds to the fourth mounting slope 61 in the figure, and the mounting hole corresponds to the fourth mounting hole 62 in the figure).

[0042] The stationary jaw plate 9 is mounted inside the frame 10, with its lower mounting slope abutting against the mounting slope of the lower boss of the frame 10. The movable jaw plate 8 is mounted inside the movable jaw 7, with its lower mounting slope abutting against the mounting slope of the lower boss of the movable jaw 7. A wedge 6 is positioned in the gap between the inner side of the tooth plate 3 and the frame 10 or the movable jaw 7. One side of the wedge 6 is mounted against the upper mounting slope of the tooth plate 3, and the other side of the wedge 6 is mounted against the corresponding mounting slope of the frame 10 or the movable jaw 7.

[0043] In this embodiment, the tensioning assembly 4 configured on the stationary jaw plate 9 includes a threaded tie rod, a nut, and a long sleeve 11. The long sleeve 11 has a welded structure, with a mounting base 13 at the bottom and a washer 12 at the top. The threaded tie rod is inserted inside the long sleeve 11. The tensioning assembly 4 passes through the mounting holes of the frame 10 and the stationary jaw plate 9. One end of the threaded tie rod is connected to a wedge 6, and the other end is fitted with a nut. Tightening the nut causes the threaded tie rod to undergo elastic deformation under tension, outputting a stable preload force. This causes the wedge 6 to displace along the inclined plane, and the stationary jaw plate 9 is clamped and fixed to the frame 10 by the compressive force of the inclined plane. The tensioning assembly 4 corresponding to the movable jaw plate 8 also passes through the mounting holes of the movable jaw 7 and the movable jaw plate 8. The end of the tensioning assembly 4 is connected to the wedge 6 to achieve clamping and fixing of the movable jaw plate 8.

[0044] This embodiment also discloses a disassembly fixture used in conjunction with the fastening device of the jaw crusher tooth plate 3. The disassembly fixture is a welded part. The disassembly fixture is provided with a limiting block 142 and a number of disassembly and assembly holes 141. The limiting block 142 is provided with rounded corners. The shape of the limiting block 142 matches the tooth groove shape of the tooth plate 3. The arrangement of the disassembly and assembly holes 141 corresponds one-to-one with the arrangement of the threaded holes on the wedge block 6. This disassembly fixture can be adapted to the disassembly and assembly of the stationary jaw tooth plate 9 and the disassembly and assembly of the moving jaw tooth plate 8.

[0045] The installation process is as follows:

[0046] Insert the wedge 6 into the inner groove of the toothed plate 3, and attach the limiting block 142 of the disassembly fixture to the tooth groove on the outer side of the toothed plate 3. Use a bolt to pass through the disassembly hole 141 of the disassembly fixture and screw it into the threaded hole of the wedge 6 to tighten the wedge 6 and the disassembly fixture to prevent the wedge 6 from falling off. Lift the toothed plate 3 so that it is close to the mating surface of the frame 10 or the moving jaw 7. The mounting slope on the lower side of the toothed plate 3 matches the mounting slope of the lower boss of the frame 10 or the moving jaw 7. Then remove the disassembly fixture. Insert the tensioning assembly 4 into the mounting holes of the frame 10 and the toothed plate 3. Tensile the tensioning assembly 4 to drive the wedge 6 to move. The toothed plate 3 is clamped and fixed by relying on the slope cooperation.

[0047] The disassembly process is as follows:

[0048] Loosen the tensioning assembly 4, insert the limiting block 142 of the disassembly fixture into the tooth groove on the outside of the tooth plate 3, screw the bolt through the disassembly hole 141 of the disassembly fixture into the threaded hole of the wedge block 6, and pull the wedge block 6 towards the tooth plate 3 through the bolt. The inclined surface cooperation between the wedge block 6 and the frame 10 and the tooth plate 3 is released, the wedge block 6 is released, and the tooth plate 3 can be lifted out directly to complete the disassembly operation.

[0049] The toothed plate 3 adopts a symmetrical structure. When the working surface of one end of the toothed plate 3 is severely worn, the toothed plate 3 can be turned around and reassembled to continue to be put into crushing operations.

Claims

1. A jaw crusher tooth plate fastening device, characterized in that, The assembly includes a toothed plate, a frame, a movable jaw, a wedge, and a tensioning assembly. The toothed plate has mounting ramps at both its upper and lower ends, and mounting holes on its inner side. The toothed plate has a symmetrical structure. The toothed plate includes a stationary jaw toothed plate and a movable jaw toothed plate. The stationary jaw toothed plate corresponding to the frame has mounting ramps, mounting holes, and a lower boss; the top surface of the lower boss has a mounting ramp. The movable jaw toothed plate corresponding to the movable jaw has mounting ramps, mounting holes, and a lower boss; the top surface of the lower boss has a mounting ramp. The wedge has mounting ramps on both sides, and mounting holes and screws are provided on the wedge. The mounting slope of the lower part of the stationary jaw plate fits into the mounting slope of the lower boss of the frame, and the mounting slope of the lower part of the moving jaw plate fits into the mounting slope of the lower boss of the moving jaw. The wedge is set in the gap between the inner side of the tooth plate and the corresponding base. The mounting slopes on both sides of the wedge fit into the upper mounting slope of the tooth plate and the mounting slope of the corresponding base, respectively. The tensioning assembly passes through the mounting hole of the corresponding base and the mounting hole of the tooth plate. The end of the tensioning assembly is connected to the wedge. The tensioning assembly applies tension to the wedge, so that the tooth plate is clamped and fixed on the corresponding base.

2. The jaw crusher tooth plate fastening device as described in claim 1, characterized in that, The tensioning assembly includes a threaded rod, a nut, and a long sleeve. The long sleeve is a welded structure with a mounting base at its bottom and a washer at its top. The threaded rod passes through the inside of the long sleeve, with one end connected to a wedge and the other end threadedly engaged with the nut.

3. The jaw crusher tooth plate fastening device as described in claim 1, characterized in that, The toothed plate has weight-reduction holes on its body.

4. The jaw crusher tooth plate fastening device as described in claim 1, characterized in that, The toothed plate, frame, and moving jaw are all integrally cast structures.

5. The jaw crusher tooth plate fastening device as described in claim 1, characterized in that, The wedge has multiple threaded holes, which are arranged symmetrically with respect to the axis of the mounting hole of the wedge.

6. A disassembly fixture for the jaw crusher tooth plate fastening device as described in claim 1, characterized in that, The disassembly fixture is a welded structure, including a limiting block and several disassembly holes. The shape of the limiting block is adapted to the tooth groove shape of the tooth plate, and the arrangement of the several disassembly holes corresponds one-to-one with the arrangement of the several threaded holes on the wedge.

7. The disassembly fixture for the jaw crusher tooth plate fastening device as described in claim 6, characterized in that, The corners of the limiting block are rounded.

8. The disassembly fixture for the jaw crusher tooth plate fastening device as described in claim 6, characterized in that, The shape of the limiting block is adapted to the tooth groove shape of both the stationary jaw tooth plate and the moving jaw tooth plate.

Images