Double-geared roller crusher capable of hydraulically adjusting center distance

Abstract

The utility model belongs to the technical field of double-geared roller crushers, and particularly relates to a double-geared roller crusher capable of hydraulically adjusting a center distance. Comprising a first-stage rack, a second-stage rack and a hydraulic driving assembly, two fixed bearing seats are arranged on the first-stage rack, and fixed crushing rollers are installed on the two fixed bearing seats; the second-stage rack is arranged on the first-stage rack in a sliding mode, two movable bearing seats are fixed to the second-stage rack, the two movable bearing seats and the two fixed bearing seats are arranged in a one-to-one correspondence mode, and movable crushing rollers are installed on the two movable bearing seats; the hydraulic driving assembly is installed on the first-stage rack, and the driving end of the hydraulic driving assembly is connected to the second-stage rack and used for driving the second-stage rack to slide in the second direction so that the movable crushing roller can be close to or away from the fixed crushing roller. The movable crushing rollers integrally move along with the second-stage rack, the second-stage rack is driven by the hydraulic driving assembly to slide to achieve dynamic adjustment of the center distance of the crushing rollers, and the device has the advantages of being stable in structure, convenient to adjust and high in synchronization precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of double-toothed roller crushers, in particular to a double-toothed roller crusher with hydraulically adjustable center distance. Background Art

[0002] As an important piece of equipment for secondary and fine crushing of materials, the double-toothed roller crusher is widely used in the mining, metallurgy, and building materials industries. Its core working mechanism is to shear and crush materials through the relative motion between the two crushing rollers. The adjustment accuracy of the center distance between the two crushing rollers directly determines the size of the output material and is a key control parameter for the equipment's process performance.

[0003] Traditional double-toothed roller crushers typically rely on mechanical adjustment mechanisms (such as adding or removing shims or shifting bolts). This approach suffers from cumbersome operation, low adjustment accuracy, and an inability to dynamically adapt to changing material properties. Especially when processing materials of varying hardness or particle size, a fixed center distance can lead to reduced crushing efficiency, increased roller tooth wear, and even equipment overload failure. Furthermore, existing crushing roller sliding mechanisms often utilize a single track or simple guide mechanism, which can easily deflect or jam under prolonged high-load conditions, impacting equipment stability and service life. Some improvements have attempted to incorporate hydraulic adjustment mechanisms, but these still present issues such as incoherence between the hydraulic drive and the frame, poor synchronization, and insufficient guide rigidity. For example, the hydraulic cylinder acting directly on a single bearing seat can result in uneven force on the crushing roller, accelerating bearing wear; the sliding track lacks a multi-stage limiter design, which can easily cause frame misalignment; and the lack of precise locking and measuring devices after adjustment makes repeat adjustments difficult. Therefore, there is an urgent need for a double-toothed roller crusher that has efficient hydraulic adjustment capabilities, strong structural stability and the ability to adapt to working conditions in real time, so as to improve equipment adaptability, extend the life of key components and reduce maintenance costs.

[0004] Therefore, it is urgent to design a double-toothed roller crusher that can achieve fast and accurate adjustment of the center distance. Utility Model Content

[0005] In order to solve the problems in the above-mentioned background technology, the utility model provides a double-toothed roller crusher with hydraulically adjustable center distance. Through the split sliding design of the first-level frame and the second-level frame, the hydraulic drive component and the composite limiting structure of the bearing seat, it effectively solves the problems of low adjustment accuracy, poor dynamic response and insufficient stability of traditional equipment.

[0006] The utility model adopts the following technical solutions:

[0007] A double-toothed roller crusher with hydraulically adjustable center distance, comprising:

[0008] A first-stage frame, on which two fixed bearing seats are spaced apart along a first direction, and fixed crushing rollers are mounted on the two fixed bearing seats;

[0009] The secondary frame is slidably arranged on the primary frame along the second direction. Two movable bearing seats are fixed on the secondary frame. The two movable bearing seats are arranged in one-to-one correspondence with the two fixed bearing seats. A movable crushing roll is installed on the two movable bearing seats.

[0010] The hydraulic driving assembly is installed on the primary frame. The driving end of the hydraulic driving assembly is connected to the secondary frame and is used to drive the secondary frame to slide along the second direction to make the movable crushing roll approach or move away from the fixed crushing roll.

[0011] Furthermore, at least two first tracks are fixedly spaced on the lower surface of the secondary frame. The first tracks extend along the second direction. The second tracks adapted to the first tracks are fixed on the upper surface of the primary frame. The first tracks are slidably connected to the second tracks.

[0012] Furthermore, secondary frame baffles are respectively fixed at both ends of the secondary frame in the first direction. The secondary frame baffles extend along the second direction. A plurality of first threaded holes are spacedly arranged on the secondary frame baffles.

[0013] Primary frame baffles are respectively fixed at both ends of the primary frame in the first direction. The primary frame baffles are located outside the secondary frame baffles and are in contact with each other. A plurality of first strip-shaped holes extending along the second direction are arranged on the primary frame baffles. Each first strip-shaped hole corresponds to a first threaded hole.

[0014] Furthermore, the fixed bearing seat extends along the second direction to the outside of the movable crushing roll. An adjustment hole is arranged at the position of the fixed bearing seat opposite to the movable bearing seat. The bearing hole of the movable bearing seat moves within the range of the adjustment hole.

[0015] Furthermore, a groove extending along the second direction is arranged on the upper end surface of the movable bearing seat. A convex rail extending along the second direction is arranged on the fixed bearing seat. The groove is adapted to the convex rail.

[0016] Furthermore, a second strip-shaped hole is arranged on the outer side wall of the groove. Second threaded holes corresponding to the second strip-shaped holes one by one are arranged on the convex rail.

[0017] Furthermore, the hydraulic driving assembly includes a hydraulic cylinder. The hydraulic cylinder is fixed on the primary frame through a bracket. An ear plate is fixed on the secondary frame. The lever of the hydraulic cylinder is installed on the ear plate.

[0018] Furthermore, there are at least two sets of the hydraulic driving assembly, and there is one set at both ends of the secondary frame in the first direction. The multiple sets of hydraulic cylinders are simultaneously advanced or simultaneously retracted through the synchronous control device of the hydraulic station.

[0019] Furthermore, a scale for measuring the moving distance of the movable bearing seat is installed on the fixed bearing seat.

[0020] Furthermore, drive modules for driving the fixed crushing roller and the movable crushing roller to rotate are provided on both the first-stage frame and the second-stage frame. The drive module includes a motor, a hydraulic coupling, a speed reducer, and a coupling that are sequentially connected in transmission. The two couplings are respectively connected to the fixed crushing roller and the movable crushing roller.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] The double-toothed roll crusher provided in this application with hydraulic adjustment of the center distance drives the second-stage frame to slide through a hydraulic drive assembly to achieve dynamic adjustment of the center distance of the crushing rolls. Combining a multi-track guiding structure and a synchronous hydraulic control system, it solves the problems of complex operation, poor synchronism, and easy wear of the tracks in the traditional adjustment method, and has the advantages of stable structure, convenient adjustment, and high synchronous accuracy.

[0023] The movable crushing roller of this application moves integrally with the second-stage frame. When the hydraulic drive assembly is started, the hydraulic cylinder pushes the second-stage frame to slide in the second direction, driving the movable bearing seat and the movable crushing roller to generate a linear displacement; since the sliding path of the second-stage frame is precisely constrained by the track assembly, the change amount of the center distance between the movable crushing roller and the fixed crushing roller can be directly controlled by the hydraulic stroke. The overall structure design of the two-stage frame significantly improves the support rigidity of the movable crushing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is the front view of the double-toothed roll crusher provided in an embodiment of this application;

[0026] Figure 2 It is the top view of the double-toothed roll crusher provided in an embodiment of this application;

[0027] Figure 3 It is the left view of the double-toothed roll crusher provided in an embodiment of this application;

[0028] Figure 4 It is the assembly three-dimensional view of the first-stage frame, the second-stage frame, and the first-stage movable bearing seat of the double-toothed roll crusher provided in an embodiment of this application;

[0029] Figure 5 It is Figure 4 the enlarged view of part A in

[0030] Figure 6 The left view of the drive module of the double-toothed roll crusher provided by an embodiment of the present application;

[0031] Figure 7 The assembly schematic diagram of the movable bearing seat of the double-toothed roll crusher provided by an embodiment of the present application;

[0032] Figure 8 The assembly sectional view of the fixed bearing seat and the movable bearing seat of the double-toothed roll crusher provided by an embodiment of the present application;

[0033] Figure 9 is Figure 8 The enlarged view of part B in

[0034] Figure 10 is Figure 3 The enlarged view of part C in

[0035] Wherein: 1 - primary frame, 11 - second track, 12 - primary frame baffle, 13 - first strip hole, 2 - secondary frame, 21 - first track, 22 - secondary frame baffle, 3 - hydraulic drive assembly, 31 - hydraulic cylinder, 32 - bracket, 33 - ear plate, 34 - hydraulic station, 4 - fixed bearing seat, 5 - fixed crushing roll, 51 - convex rail, 6 - movable bearing seat, 61 - groove, 62 - second strip hole, 7 - movable crushing roll, 8 - scale, 9 - drive module, 91 - motor, 92 - fluid coupling, 93 - speed reducer, 94 - coupling. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0037] Next, the present invention will be elaborated in detail in conjunction with the attached Figure 1 to the attached Figure 10 and specific embodiments.

[0038] Refer to Figures 1 to 10, the present utility model provides a double-toothed roll crusher with hydraulic center distance adjustment, which includes a first-stage frame 1, a second-stage frame 2 and a hydraulic drive assembly 3. Two fixed bearing seats 4 are arranged at intervals on the first-stage frame 1 in the first direction, and a fixed crushing roll 5 is installed on the two fixed bearing seats 4; the second-stage frame 2 is slidably arranged on the first-stage frame 1 in the second direction, and two movable bearing seats 6 are fixed on the second-stage frame 2. The two movable bearing seats 6 are arranged corresponding to the two fixed bearing seats 4 one by one, and a movable crushing roll 7 is installed on the two movable bearing seats 6; the hydraulic drive assembly 3 is installed on the first-stage frame 1, and the drive end of the hydraulic drive assembly 3 is connected to the second-stage frame 2, and is used to drive the second-stage frame 2 to slide in the second direction so that the movable crushing roll 7 approaches or moves away from the fixed crushing roll 5, thereby realizing the adjustment of the roll distance between the two crushing rolls. In this application, the movable crushing roll 7 is integrated on the second-stage frame 2, and the purpose of adjusting the roll distance can be achieved by adjusting the position of the second-stage frame 2.

[0039] It should be noted that the first direction in this application refers to the extending direction of the axes of the two crushing rolls, usually set as the horizontal direction; the second direction is the horizontal direction perpendicular to the axis of the crushing roll. This direction setting makes the adjustment path of the distance between the two crushing rolls consistent with the direction of the force on the material during crushing, avoiding torque interference caused by oblique displacement. The drive end of the hydraulic drive assembly 3 is connected to the two side ends of the second-stage frame 2. Specifically, the hinged connection method of the hydraulic cylinder piston rod and the frame ear plate can be adopted to ensure that the thrust is evenly transmitted to the entire second-stage frame 2.

[0040] Refer to Figure 4 and Figure 5 , the fixed crushing roll 5 of this application is fixed on the first-stage frame 1 through the fixed bearing seat 4 to form a reference working position, and the movable crushing roll 7 moves integrally with the second-stage frame 2. When the hydraulic drive assembly 3 is started, the hydraulic cylinder 31 pushes the second-stage frame 2 to slide in the second direction, driving the movable bearing seat 6 and the movable crushing roll 7 to generate a linear displacement; since the sliding path of the second-stage frame 2 is accurately constrained by the track assembly, the change amount of the center distance between the movable crushing roll 7 and the fixed crushing roll 5 can be directly controlled by the hydraulic stroke. The overall structure design of the two-stage frame significantly improves the support rigidity of the movable crushing roll 7. By synchronously controlling the propulsion amounts of the hydraulic cylinders 31 on both sides through the hydraulic system, it is ensured that the displacement amounts at both ends of the second-stage frame 2 are the same, thereby maintaining the parallel state of the fixed crushing roll 5 and the movable crushing roll 7. Of course, the specific number of sets of the hydraulic drive assembly 3 in this application is not limited, and at least two sets are provided to ensure uniform force on the second-stage frame 2.

[0041] Furthermore, refer to Figure 8 and Figure 9, at least two first rails 21 are fixedly spaced on the lower surface of the secondary frame 2, and the first rails 21 extend along the second direction; a second rail 11 adapted to the first rails 21 is fixedly arranged on the upper surface of the primary frame 1, and the first rails 21 are slidably connected to the second rail 11; specifically, the first rail 21 refers to a sliding guide member fixed on the lower surface of the secondary frame 2 and extending along the second direction, which is used to bear the vertical load during the movement of the secondary frame 2 and limit the lateral displacement. The second rail 11 refers to an adapted structure fixed on the upper surface of the primary frame 1 and forming a sliding pair with the first rail 21, which is used to form a surface contact guiding surface with the first rail 21. When the first rail 21 and the second rail 11 form a double-rail sliding pair, the two rails are symmetrically distributed along the first direction, so that the vertical load is evenly distributed on the contact surfaces of the two rails during the movement of the secondary frame 2; the bearing capacity of the sliding pair is improved by double-rail symmetric support, and the lateral displacement is inhibited by the surface contact guiding structure, ensuring that the secondary frame 2 realizes high-precision linear movement under hydraulic drive and avoiding jamming caused by rail deformation. Preferably, the first rail 21 is a dovetail groove guide rail, and the second rail 11 is a T-shaped guide rail. The dovetail groove guide rail is installed at the bottom of the secondary frame 2 to form a high-rigidity guiding pair with the T-shaped guide rail at the top of the primary frame 1. In this application, the overall displacement mode of the secondary frame 2 carrying the movable crushing roller 7 is adopted, so that the thrust is evenly distributed on both sides of the secondary frame 2, the stress state of the movable crushing roller 7 is more balanced, and the stability and positioning accuracy of the adjustment process are significantly improved through the synergistic effect of hydraulic drive and multi-rail guidance, effectively ensuring the consistency of the crushed discharge particle size.

[0042] Further, secondary frame baffles 22 are respectively fixed at both ends of the secondary frame 2 in the first direction, the secondary frame baffles 22 extend along the second direction, and a plurality of first threaded holes (not shown in the figure) are provided at intervals on the secondary frame baffles 22; primary frame baffles 12 are respectively fixed at both ends of the primary frame 1 in the first direction, the primary frame baffles 12 are located outside the secondary frame baffles 22 and are in contact with each other; a plurality of first strip-shaped holes 13 extending along the second direction are provided on the primary frame baffles 12, and each first strip-shaped hole 13 corresponds to a first threaded hole.

[0043] Specifically, the secondary frame baffle 22 refers to a vertical plate-like structure welded or bolted to both end faces of the secondary frame 2, and its extending direction is consistent with the sliding direction. The first threaded hole refers to a threaded through-hole evenly distributed along the length direction of the secondary frame baffle 22, and specifically, M16 or M20 standard threaded holes can be used, which are used to cooperate with bolts to achieve multi-stage fixation. The primary frame baffle 12 refers to a vertical plate member fixed on both sides of the primary frame 1, and its inner side surface contacts the outer side surface of the secondary frame baffle 22 to form a contact plane of the sliding pair, which is used to transmit lateral loads. The first elongated hole 13 refers to an oblong hole opened on the primary frame baffle 12, and its length direction is parallel to the sliding direction, and the hole width is slightly larger than the bolt rod diameter, allowing the bolt to move in the hole along the second direction.

[0044] During the sliding process of the secondary frame 2, the secondary frame baffle 22 always remains in contact with the primary frame baffle 12 to form a continuous sliding surface to eliminate lateral clearance. When the secondary frame 2 moves to the target position, the secondary frame baffle 22 and the primary frame baffle 12 are locked by passing a bolt through the first elongated hole 13 and screwing it into the corresponding first threaded hole. Multiple first threaded holes are spaced along the second direction, so that at least two bolts can be locked simultaneously after each adjustment, forming a two-point positioning constraint. The length direction of the first elongated hole 13 coincides with the sliding track, allowing the bolt to move freely in the hole without interfering with the adjustment action. This application effectively prevents the lateral offset of the secondary frame 2 during the hydraulic adjustment process and ensures the straightness of the adjustment track of the center distance of the movable crushing roller 7.

[0045] Furthermore, the fixed bearing seat 4 extends along the second direction to the outside of the movable crushing roller 7, and an adjustment hole (not shown in the figure) is opened at a position on the fixed bearing seat 4 opposite to the movable bearing seat 6, and the bearing hole of the movable bearing seat 6 moves within the range of the adjustment hole. In other words, an extended section is formed on the side of the fixed bearing seat 4 facing the movable crushing roller 7 to cover the movement path of the movable crushing roller 7. The adjustment hole refers to a through-hole penetrating the extended section of the fixed bearing seat 4, and its hole diameter is larger than the outer diameter of the bearing hole of the movable bearing seat 6, allowing the bearing hole of the movable bearing seat 6 to translate along the second direction. When the hydraulic drive assembly 3 pushes the secondary frame 2 to slide, the secondary frame 2 drives the movable bearing seat 6 to move along the second direction, and at this time, the bearing hole of the movable bearing seat 6 translates within the range of the adjustment hole.

[0046] Furthermore, refer to Figure 4 、 Figure 5 and Figure 8, a groove 61 extending in the second direction is provided on the upper end surface of the movable bearing block 6, and a convex rail 51 extending in the second direction is provided on the fixed bearing block 4. The groove 61 is adapted to the convex rail 51. The groove 61 can be a continuous groove structure formed on the top of the movable bearing block 6, such as a U-shaped groove structure, which extends along the adjusting direction of the center distance of the crushing rolls and is used to accommodate the convex rail 51 of the fixed bearing block 4 and define the sliding track. The convex rail 51 can be a strip-shaped structure protruding from the surface of the fixed bearing block 4, such as a long strip of metal block, whose extending direction is consistent with that of the groove 61 and is embedded inside the groove 61 to form a sliding fit, and the guiding constraint is provided through the contact surface between the convex rail 51 and the groove 61. The gap between the side wall of the groove 61 and the side wall of the convex rail 51 is controlled within a set range. For example, the gap value does not exceed 1 mm to limit the lateral offset.

[0047] Specifically, the movable bearing block 6 forms a nested sliding pair with the convex rail 51 of the fixed bearing block 4 through the groove 61. When the hydraulic drive assembly 3 pushes the secondary frame 2 to move in the second direction, the mating structure in which the convex rail 51 is embedded in the groove 61 enables the movable bearing block 6 to only translate along the preset direction, ensuring the accuracy of the movement of the movable bearing block 6.

[0048] Further, referring to Figure 5 , a second strip-shaped hole 62 is provided on the outer side wall of the groove 61, and a second threaded hole (not shown in the figure) corresponding to the second strip-shaped hole 62 is provided on the convex rail 51. The second strip-shaped hole 62 can be a rectangular or elliptical through hole extending along the sliding direction, allowing the fastener to pass through the hole body at different positions. The second threaded hole is an internal threaded hole processed on the surface of the convex rail 51, and its position matches the sliding path of the second strip-shaped hole 62 to ensure that there is a locking interface at each adjustment point. After the movable bearing block 6 slides along the convex rail 51 to the target position, the fastener passes through the second strip-shaped hole 62 and is screwed into the corresponding second threaded hole, so as to form a rigid connection between the groove 61 and the convex rail 51. The length direction of the second strip-shaped hole 62 is parallel to the sliding direction, allowing continuous selection of locking points within the adjustment range, and the shear stress is dispersed by the fasteners distributed at multiple points to avoid structural deformation caused by excessive local stress.

[0049] Further, referring to Figure 3 and Figure 5, the hydraulic drive assembly 3 includes a hydraulic cylinder 31. The hydraulic cylinder 31 is fixed to the first-stage frame 1 through a bracket 32. An ear plate 33 is fixed to the second-stage frame 2, and the lever of the hydraulic cylinder 31 is mounted on the ear plate 33. The hydraulic cylinder 31 forms a rigid connection with the first-stage frame 1 through the bracket 32, which can prevent the hydraulic cylinder 31 from shifting in position due to the vibration or force-induced deformation of the frame, ensuring the stability of the driving force transmission path. A pin shaft connection is adopted between the ear plate 33 of the second-stage frame 2 and the lever of the hydraulic cylinder 31, allowing the lever to rotate freely during the sliding process of the second-stage frame 2, thereby maintaining the force application direction of the hydraulic cylinder 31 always along the sliding direction. When the hydraulic cylinder 31 pushes the second-stage frame 2 to move, the bracket 32 evenly transmits the reaction force of the hydraulic cylinder 31 to the first-stage frame 1; the hinged structure of the ear plate 33 eliminates the lateral component force acting on the transverse direction of the movable crushing roller 7, ensuring that the two movable crushing rollers 7 move synchronously and parallelly during the adjustment process.

[0050] Further, referring to Figure 2 and Figure 4 , there are at least two sets of hydraulic drive assemblies 3, and there is one set at each of the two end portions of the second-stage frame 2 in the first direction. Multiple sets of hydraulic cylinders 31 are simultaneously advanced or retracted through the synchronous control device of the hydraulic station 34. Hydraulic cylinders 31 are respectively installed at both ends of the second-stage frame 2, and the piston rods of the hydraulic cylinders 31 are rigidly connected to the frame through the ear plates 33. The hydraulic station 34 delivers equal amounts of pressurized oil to the two sets of hydraulic cylinders 31 through oil pipes. The synchronous control device real-time monitors the displacement of the two hydraulic cylinders 31 on both sides. When the detected displacement deviation exceeds the threshold value, it automatically adjusts the flow rate of the corresponding oil circuit. Thus, the two hydraulic cylinders 31 always maintain an equal-speed movement during the advancement or retraction process, driving the second-stage frame 2 to translate along the track with balanced forces on both sides, avoiding uneven wear on the contact surface between the frame and the track due to excessive driving force on one side.

[0051] Further, referring to Figure 3 and Figure 10 , a scale 8 for measuring the moving distance of the movable bearing block 6 is installed on the fixed bearing block 4. The scale 8 is a linear measuring device for indicating the displacement. Specifically, the scale lines can be formed by laser etching on the surface of a stainless steel material, or a metal scale structure with a sliding pointer can be assembled. By vertically fixing it on the side surface of the fixed bearing block 4, the scale lines are aligned parallel to the movement track of the movable bearing block 6, thereby converting the displacement of the movable bearing block 6 into a readable value.

[0052] When the hydraulic drive assembly 3 pushes the secondary frame 2 to slide in the second direction, the mobile bearing seat 6 undergoes linear displacement relative to the fixed bearing seat 4. At this point, the zero reference of the scale 8 remains fixed to the fixed bearing seat 4. The outer end face of the mobile bearing seat 6 or a specific marking point serves as a reading reference, moving synchronously with the displacement. By observing the position changes of the marking point corresponding to the scale line, the operator can directly determine the center distance adjustment between the mobile crushing roller 7 and the fixed crushing roller 4. This measurement process requires no external tools. After the hydraulic cylinder completes the forward or backward movement, the locking operation is performed according to the scale data, eliminating adjustment errors caused by visual estimation or indirect measurement.

[0053] In some embodiments, a scale 8 can be positioned on the outer surface of the fixed bearing seat 4, with a scale range covering the maximum adjustment range of the movable bearing seat. For example, a metal scale with a rust-proof coating can be used, secured to the surface of the fixed bearing seat 4 via countersunk bolts. A slider with an indicator arrow can be positioned at a corresponding position on the movable bearing seat 6, with a clearance fit between the slider and the scale surface to ensure smooth sliding.

[0054] For further information, see Figure 1 、 Figure 2 and Figure 6 , a driving module 9 for driving the fixed crushing roller 5 and the mobile crushing roller 7 to rotate is provided on both the primary frame 1 and the secondary frame 2. The driving module 9 includes a motor 91, a hydraulic coupling 92, a reducer 93, and a coupling 94 which are sequentially connected in a transmission manner. The two couplings 94 are respectively connected to the fixed crushing roller 5 and the mobile crushing roller 7. The power output by the motor 91 is torque-buffered by the hydraulic coupling 92 and then transmitted to the reducer 93. After deceleration and torque increase, the crushing rollers are driven to rotate by the coupling 94. The two independent driving modules 9 respectively control the fixed crushing roller 5 and the mobile crushing roller 7, and maintain the synchronous speed of the two rollers during the center distance adjustment process, avoiding uneven torque distribution due to a single driving source. The present application realizes the dynamic adaptation of the crushing roller drive system and the center distance adjustment mechanism, effectively reduces the mechanical stress of the transmission components during the adjustment process, ensures the synchronization accuracy of the dual-roller speed, and avoids the abnormal increase of the equipment impact load due to the rigid connection of the transmission system.

[0055] The above further describes the present invention with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A double-toothed roll crusher with hydraulically adjustable center distance, characterized in that, include: A primary frame, wherein two fixed bearing seats are provided on the primary frame at intervals along a first direction, and fixed crushing rollers are mounted on the two fixed bearing seats; A secondary frame, wherein the secondary frame is slidably arranged on the primary frame along the second direction, two movable bearing seats are fixed on the secondary frame, the two movable bearing seats are arranged in a one-to-one correspondence with the two fixed bearing seats, and movable crushing rollers are installed on the two movable bearing seats; a hydraulic drive assembly mounted on the primary frame, wherein a driving end of the hydraulic drive assembly is connected to the secondary frame, and is used to drive the secondary frame to slide in a second direction so that the movable crushing roller approaches or moves away from the fixed crushing roller; At least two first rails are fixed at intervals on the lower surface of the secondary rack, and the first rails extend along the second direction; a second rail adapted to the first rail is fixed on the upper surface of the primary rack, and the first rail is slidably connected to the second rail.

2. The double-toothed roll crusher with hydraulically adjustable center distance according to claim 1, wherein The two ends of the secondary rack in the first direction are respectively fixed with secondary rack baffles, the secondary rack baffles extend along the second direction, and the secondary rack baffles are provided with a plurality of first threaded holes arranged at intervals; A first-stage rack baffle is fixed to each of the two ends of the first-stage rack in the first direction, and the first-stage rack baffle is located on the outside of the second-stage rack baffle and is arranged in contact with each other; a plurality of first strip holes extending along the second direction are formed on the first-stage rack baffle, and each of the first strip holes corresponds to one of the first threaded holes.

3. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 1, wherein The fixed bearing seat extends to the outside of the movable crushing roller along the second direction. An adjustment hole is provided on the fixed bearing seat at a position opposite to the movable bearing seat. The bearing hole of the movable bearing seat moves within the range of the adjustment hole.

4. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 3, characterized in that, The upper end surface of the movable bearing seat is provided with a groove extending along the second direction, and the fixed bearing seat is provided with a convex rail extending along the second direction, and the groove is adapted to the convex rail.

5. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 4, characterized in that, A second strip-shaped hole is formed on the outer side wall of the groove, and a second threaded hole corresponding to the second strip-shaped hole is provided on the convex rail.

6. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 1, characterized in that, The hydraulic drive assembly includes a hydraulic cylinder, which is fixed to the primary frame via a bracket. A lug plate is fixed to the secondary frame, and a lever of the hydraulic cylinder is mounted on the lug plate.

7. The double-toothed roll crusher with hydraulically adjustable center distance according to claim 6, characterized in that, There are at least two sets of hydraulic drive components, and one set is provided at each end of the secondary frame located in the first direction. The multiple sets of hydraulic cylinders are simultaneously advanced or retreated through the synchronous control device of the hydraulic station.

8. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 1, characterized in that, A scale for measuring the moving distance of the movable bearing seat is installed on the fixed bearing seat.

9. The double-toothed roll crusher with hydraulic center distance adjustment according to claim 1, characterized in that The first-level frame and the second-level frame are both provided with a driving module for driving the fixed crushing roller and the movable crushing roller to rotate. The driving module includes a motor, a hydraulic coupler, a reducer, and a coupling which are sequentially connected in transmission. The two couplings are respectively connected to the fixed crushing roller and the movable crushing roller.

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