Tooth tip clearance measuring device and tooth tip clearance measuring method for jaw crusher

Abstract

To reduce the cost of a measuring instrument. It also improves the availability of components.SOLUTION: The tooth tip interval measuring device 8 measures the tooth tip interval S between a fixed tooth 3 and a movable tooth 4 in a jaw crusher 1 for crushing an object to be crushed by the fixed tooth 3 fixed to a body 2 side and the movable tooth 4 swinging with respect to the fixed tooth 3. The jaw crusher 1 is provided with a toggle plate 5 for limiting the rocking position of the movable jaw 4, a toggle block 6 for regulating the position of the toggle plate 5, and a jaw tip adjusting mechanism 7 for moving the toggle block 6. The tooth-tip distance measuring device 8 includes a measuring instrument 81 for measuring the tooth-tip distance S based on the position of the toggle block 6. The measuring device 81 includes a positioning meter 82 for measuring the position of the toggle block 6, and a calculation unit 83 for calculating the tooth-tip spacing S from the value measured by the positioning meter 82. The measurement device 81 is attachable to and detachable from the main body 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a tooth tip distance measuring device and a tooth tip distance measuring method for a jaw crusher. [Background technology]

[0002] A jaw crusher crushes materials by feeding them into a space formed between fixed teeth and movable teeth that oscillate relative to the fixed teeth. By keeping the distance between the fixed teeth and the movable teeth (tooth tip distance) constant, it is possible to obtain materials crushed to a certain size or less (see, for example, Patent Document 1 below).

[0003] In the technology of Patent Document 1 below, the tooth tip spacing of the jaw crusher is measured and adjusted using a measuring tool such as an inner pass, which poses a problem in that the work of adjusting the tooth tip spacing requires time and effort.

[0004] The technology in Patent Document 2 below proposes a technology in which a measuring device (sensor) detects the movement stroke of a toggle block for adjusting the swingable range of the movable teeth, and electronic equipment calculates the tooth tip spacing from this movement stroke. This technology makes it possible to simplify the adjustment work of the tooth tip spacing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4090300 [Patent Document 2] Patent No. 5553257 Summary of the Invention [Problem to be solved by the invention]

[0006] The operating environment of a jaw crusher is known to be harsh in terms of vibration, dust, high temperatures due to direct sunlight, and other factors. Measuring instruments that can withstand such harsh environments are expensive and difficult to obtain. Another problem is that the jaw crusher cannot be operated during maintenance work, such as inspection of the measuring instrument. Furthermore, because tooth tip spacing adjustment requires the use of a narrow gap, the measuring instrument can get in the way of this work. For this reason, the measuring instrument must be installed in a location that does not interfere with the work, which places design constraints on the instrument.

[0007] The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a technique capable of solving the above-mentioned problems. [Means for solving the problem]

[0008] The present invention can be expressed as the inventions described in the following items.

[0009] (Item 1) A tooth tip distance measuring device for measuring a tooth tip distance between a fixed tooth and a movable tooth in a jaw crusher for crushing an object to be crushed by a fixed tooth fixed to a main body side and a movable tooth that oscillates relative to the fixed tooth, The jaw crusher includes a toggle plate for limiting the swing position of the movable teeth, a toggle block for regulating the position of the toggle plate, and a tooth tip adjustment mechanism for moving the toggle block, the tooth tip spacing measuring device includes a measuring device for measuring the tooth tip spacing based on the position of the toggle block; The measuring device has a positioning meter that measures the position of the toggle block, and a calculation unit that calculates the tooth tip interval from the measurement value of the positioning meter, and the measuring device is detachable from the main body. Tooth tip spacing measuring device.

[0010] (Item 2) The measuring device further includes a display unit that displays the calculated tooth tip distance. Item 1. A tooth tip spacing measuring device.

[0011] (Item 3) Further provided is an installation tool that is detachably attached to the main body side, The installation tool is configured to position the measuring device relative to the main body by bringing the measuring device into contact with the installation tool when the installation tool is attached to the main body. Item 1 or 2. The tooth tip distance measuring device.

[0012] (Item 4) The toggle block further includes a reflector detachably attached thereto, The positioning device is configured to measure the position of the toggle block by measuring the distance to the reflector attached to the toggle block. Item 1 or 2. The tooth tip distance measuring device.

[0013] (Item 5) The tooth tip adjustment mechanism further includes a rear support member fixed to the main body side, The installation tool is detachably attached to the rear support member, and is thereby attached to the main body side. The measuring device is positioned by contacting the installation tool and is removably attached to the rear support member, thereby making it detachable from the main body. Item 3. The tooth tip spacing measuring device according to item 3.

[0014] (Item 6) A tooth tip spacing adjustment method using the tooth tip spacing measuring device described in item 1, When the object to be crushed is crushed by the jaw crusher, the measuring device is separated from the main body side, When measuring the tooth tip distance, the measuring device is attached to the main body, the position of the toggle block is measured by the positioning meter, and the tooth tip distance is calculated by the calculation unit from the measurement value of the positioning meter. How to measure the tooth tip spacing of a jaw crusher.

[0015] (Item 7) A tooth tip spacing adjustment method using the tooth tip spacing measuring device described in item 4, When the object to be crushed is crushed by the jaw crusher, the measuring device is separated from the main body side, When measuring the tooth tip spacing, a step of attaching the measuring device to the main body; a step of moving the toggle block to set the tooth tip interval to 0, and measuring the distance from the reflector to the measuring device at this time using the position measuring device; a step of adjusting the tooth tip spacing to a target tooth tip spacing based on a distance from the reflector to the measuring device when the tooth tip spacing is 0; and calculating the adjusted tooth tip spacing by the calculation unit by measuring the distance from the reflector to the measuring device after adjusting the tooth tip spacing. How to measure the tooth tip spacing of a jaw crusher.

[0016] (Item 8) A jaw crusher having the tooth tip distance measuring device according to item 1. [Effects of the Invention]

[0017] According to the technology of the present invention, the measuring device including the positioning device can be removed from the jaw crusher while the jaw crusher is in operation. This eliminates the need to expose the measuring device to harsh environments. This reduces the cost of the measuring device and improves the availability of parts.

[0018] Furthermore, even when the measuring device is undergoing maintenance, the maintenance can be performed with the measuring device removed, so the jaw crusher can be operated even during maintenance work.

[0019] Furthermore, if the measuring device gets in the way during the tooth tip spacing adjustment work, it can be temporarily removed, which has the effect of improving the efficiency of the tooth tip adjustment work and reducing the constraints on the design of the equipment. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic explanatory diagram of a jaw crusher in which a tooth tip distance measuring device according to an embodiment of the present invention is used; [Figure 2] 1 is a block diagram showing a schematic configuration of a measuring device used in a tooth tip distance measuring device according to an embodiment of the present invention. FIG. [Figure 3] 2 is an explanatory diagram for explaining a tooth tip distance measuring method using the tooth tip distance measuring device of FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, a tooth tip distance measuring device according to one embodiment of the present invention and an example of a jaw crusher in which the device is used will be described with reference to the accompanying drawings.

[0022] (Jaw crusher configuration) First, as a premise for the explanation, we will explain the configuration of the jaw crusher 1 according to this embodiment. This jaw crusher 1 crushes materials to be crushed using fixed teeth 3 fixed to the main body 2 side and movable teeth 4 that oscillate relative to the fixed teeth 3.

[0023] More specifically, the fixed tooth 3 in this embodiment is attached to a fixed wall 22 that is fixed to the main body 2 via a cheek plate 21, thereby being fixed to the main body 2 side.

[0024] Moreover, the moving tooth 4 in this embodiment is attached to a jaw 11. The jaw 11 is attached to an eccentric shaft 12 via an appropriate bearing (not shown), and is configured to oscillate by an eccentric distance as the eccentric shaft 12 rotates. A pulley 13 is attached to the eccentric shaft 12, and the eccentric shaft 12 is rotated by a rotational force applied to the pulley 13 by a belt or the like (not shown).

[0025] Furthermore, the jaw crusher 1 has a toggle plate 5 for regulating the swing range of the movable teeth 4, a toggle block 6 for regulating the position of the toggle plate 5, and a tooth tip adjustment mechanism 7 for moving the toggle block 6.

[0026] One end (the right end in FIG. 1) of the toggle plate 5 abuts against the toggle block 6, and the other end (the left end in FIG. 1) abuts against the back surface of the jaw 11. This prevents the toggle plate 5 from moving toward the back surface of the jaw 11 (to the right in FIG. 1), thereby restricting the tooth tip spacing S (see FIG. 1) so as not to become wider than a specified value. Although the toggle plate 5 abuts against both the jaw 11 and the toggle block 6, it is not fixed thereto, and therefore allows the jaw 11 to move up and down.

[0027] The toggle block 6 is supported and positioned by a rear support member 71 (described later) of the tooth tip adjustment mechanism 7, and is capable of preventing the toggle plate 5 from moving backward (that is, moving toward the rear of the jaw 11).

[0028] The tooth tip adjustment mechanism 7 has a rear support member 71, a hydraulic cylinder 72, a push rod 73, and an adjustment plate 74. The rear support member 71 has a substantially rectangular box shape and is fixed to the main body 2 side.

[0029] The hydraulic cylinder 72 is disposed inside the rear support member 71 and is supported thereby. The push rod 73 is disposed between the hydraulic cylinder 72 and the toggle block 6 so as to be movable relative to the rear support member 71. One end (the right end in FIG. 1) of the push rod 73 is pushed toward the jaw 11 (to the left in FIG. 1) by the hydraulic cylinder 72 when the hydraulic cylinder 72 is extended, and moves. The other end (the left end in FIG. 1) of the push rod 73 abuts against the toggle block 6 so that the pressing force of the hydraulic cylinder 72 can push the toggle block toward the jaw 11. The adjusting plate 74 is detachably disposed between the toggle block 6 and the rear support member 71 and can regulate the position of the toggle block 6 (see FIG. 3(c) described below). The thickness and number of the adjusting plates 74 are determined depending on the position of the toggle block 6 to be disposed.

[0030] The jaw crusher 1 of this embodiment also has a tension mechanism 9. The tension mechanism 9 has a tension rod 91, a compression spring 92, a spring holder 93, a spring receiving member 94, and a nut 95.

[0031] One end (the left end in FIG. 1) of the tension rod 91 is attached near the lower end of the jaw 11 so as to be rotatable in both forward and reverse directions within a predetermined angular range. A compression spring 92 is disposed between a spring holder 93 fitted onto the tension rod 91 and a spring receiving member 94 fixed to the rear support member 71 (i.e., on the main body 2 side). This allows the compression spring 92 to press the spring holder 93 toward the other end of the tension rod 91 (i.e., toward the right in FIG. 1), thereby pulling the jaw 11 toward its rear surface (i.e., toward the right in FIG. 1). The movement stroke of the spring holder 93 is regulated by a nut 95 threaded onto the tension rod 91, allowing the necessary tension to be applied to the tension rod 91.

[0032] (tooth tip spacing measuring device) The tooth tip distance measuring device 8 according to this embodiment is for measuring the tooth tip distance S (see FIG. 1) between the fixed tooth 3 and the movable tooth 4. The tooth tip distance measuring device 8 has a measuring instrument 81 for measuring the tooth tip distance S based on the position of the toggle block 6. The measuring instrument 81 includes a positioning meter 82 that measures the position of the toggle block 6 and a calculation unit 83 that calculates the tooth tip distance S from the measurement value of the positioning meter 82 (see FIG. 2). The measuring instrument 81 according to this embodiment further includes a display unit 84 that displays the tooth tip distance calculated by the calculation unit 83 (see FIG. 2). That is, the measuring instrument 81 according to this embodiment has the positioning meter 82, the calculation unit 83, and the display unit 84 built into a single housing (i.e., packaged). The measuring instrument 81 is configured to be powered by an external power source. However, the measuring instrument 81 may also be powered by a replaceable or rechargeable battery (not shown).

[0033] In this embodiment, the measuring device 81 is placed on an installation tool 85, which will be described later, and this allows it to be easily attached to and detached from the rear support member 71. This makes the measuring device 81 detachable from the main body 2 in this embodiment.

[0034] The position meter 82 of this embodiment may use a laser beam L (see FIG. 1). A commercially available product may be used as this type of position meter 82, and therefore further detailed description will be omitted.

[0035] The calculation unit 83 is capable of performing the necessary calculations using a memory unit, a power supply, a processor, etc., and such calculation unit 83 can be configured using, for example, a microcomputer. The calculation unit 83 has a predetermined calculation program so that it can calculate the tooth tip distance from the distance detected by the position meter 82. The coefficients required in the calculation program can be obtained, for example, by prior experiments. Since such calculation programs are well known, their description will be omitted. The calculation unit 83 can also be configured using an ASIC or FPGA.

[0036] The display unit 84 is an appropriate display using an LED, a liquid crystal display, etc. The display unit 84 is preferably configured to be able to directly display the distance detected by the position meter 82 in addition to the calculated tooth tip distance.

[0037] The tooth tip distance measuring device 8 of this embodiment has an installation fixture 85 that is detachably attached to the main body 2. With the installation fixture 85 attached to the main body 2, the measuring device 81 is positioned relative to the main body 2 by abutting the installation fixture 85 against the installation fixture 85. More specifically, the installation fixture 85 of this embodiment has a substantially L-shaped front abutment portion 85a against which the front end of the measuring device 81 abuts, and a substantially L-shaped rear abutment portion 85b that abuts against the rear end of the rear support member 71 (see FIG. 1 ). This allows the measuring device 81 to be positioned relative to the rear support member 71, i.e., the main body 2. A magnet (not shown) is attached to the rear abutment portion 85b, and the magnetic force of this magnet prevents relative movement between the installation fixture 85 and the main body 2. This also prevents relative movement of the measuring device 81 relative to the main body 2. In this embodiment, by attaching a magnet to the rear contact portion 85b, the influence of the magnetic force from the magnet on the measuring device 81 is reduced, and measurement accuracy can be maintained.

[0038] The tooth tip distance measuring device 8 of this embodiment also has a reflector 86 that is detachably attached to the toggle block 6 (see FIG. 1). The reflector 86 of this embodiment is a plate-like body with an end bent into a substantially L-shape, and is detachably attached to the toggle block 6 by a magnet. The position meter 82 of this embodiment measures the distance to the reflector 86 attached to the toggle block 6, thereby measuring the position of the toggle block 6.

[0039] The configuration of the jaw crusher 1 other than the above can be the same as that of the conventional one, so further detailed explanation will be omitted.

[0040] (Operation of this embodiment) (Jaw crusher operation) When crushing materials using the jaw crusher 1, the measuring device 81 is moved away from the main body 2. In this state, the eccentric shaft 12 is rotated to oscillate the jaws 11. Then, the materials to be crushed can be thrown between the fixed teeth 3 and the movable teeth 4 and crushed. The crushed materials fall through the tooth tip gap S and are collected. The crushing operation is the same as that of a conventional jaw crusher. In this embodiment, the installation tool 85 and the reflector 86 are also removed from the rear support member 71 and the toggle block 6, respectively, while the jaw crusher 1 is in operation.

[0041] In this embodiment, when crushing the object to be crushed, the measuring device 81 is separated from the main body 2, so there is no need to expose the measuring device 81 to the harsh environment during the crushing operation. This has the advantage that the cost of the measuring device 81 can be kept low and the ease of obtaining parts can be improved.

[0042] Furthermore, when performing maintenance on the measuring device 81, the maintenance work can be performed with the measuring device 81 removed. Therefore, there is an advantage that the jaw crusher 1 can be operated even during maintenance work on the measuring device 81.

[0043] (Operation of tooth tip spacing measuring device) Next, the operation of the tooth tip distance measuring device according to this embodiment will be described with reference to FIG.

[0044] (Figure 3(a)) First, the measuring device 81 is attached to the main body 2. More specifically, the rear contact portion 85b of the installation tool 85 is brought into contact with the rear support member 71 to position it, and the installation tool 85 is then attached to the rear support member 71. Next, the front end of the measuring device 81 is brought into contact with the front contact portion 85a of the installation tool 85 to position it, and the measuring device 81 can be attached to the rear support member 71 (i.e., to the main body 2) via the installation tool 85.

[0045] Also, before, after, or at the same time as this, reflector 86 is attached to toggle block 6. At this time, it is preferable to measure the distance from measuring device 81 to reflector 86 with measuring device 81 and attach reflector 86 while comparing the obtained distance with a predetermined reference distance. In this way, reflector 86 can be installed so that it can be positioned within the measurable range of position meter 82 even if toggle block 6 moves to the maximum extent. For convenience, the distance from measuring device 81 to reflector 86 at this time will be referred to as the first reference distance in this specification.

[0046] In this embodiment, if the distance to the reflector 86 detected by the position meter 82 is displayed on the display unit 84, the worker can work while checking this distance at the site where the jaw crusher 1 is installed (i.e., at the machine side), thereby improving work efficiency.

[0047] (Figure 3(b)) Next, the nut 95 of the tension mechanism 9 is loosened to sufficiently reduce the tensile force from the tension rod 91 to the jaw 11. In this state, the jaw 11 is moved toward the fixed tooth 3 to set the distance between the fixed tooth 3 and the movable tooth 4 (i.e., the tooth tip distance) to zero. This can be done, for example, by using the hydraulic cylinder 72 to push the toggle block 6 and toggle plate 5 toward the fixed tooth 3. Next, the distance to the reflector 86 in this state is measured by the position meter 82. The difference between this distance and the first reference distance, if converted to the tooth tip distance, corresponds to the tooth tip distance S before adjustment. In this embodiment, this conversion can be performed by the calculation unit 83. The operator can know the tooth tip distance S corresponding to this difference by looking at the display unit 84 on the jaw crusher 1 side (i.e., on the machine side). This process corresponds to the process of "moving the toggle block 6 to set the tooth tip distance S to zero, and measuring the distance from the reflector 86 to the measuring device 81 at this time using the position meter 82." The difference may be understood as an absolute value.

[0048] Furthermore, the distance from reflector 86 to measuring device 81 when tip spacing S=0 becomes the reference for determining the tip spacing thereafter. Therefore, this distance may be set to 0 (i.e., the second reference distance) in position meter 82 or calculation unit 83. In this way, the distance to reflector 86 obtained thereafter by position meter 82 can be immediately treated as a difference in the above sense, and the calculation process in calculation unit 83 can be simplified.

[0049] In this embodiment, the measuring device 81 having the display unit 84 can be installed on the jaw crusher 1, so that the worker can work while looking at the display unit 84 at the machine side, thereby improving the work efficiency of the worker.

[0050] (Figure 3(c)) Next, based on the obtained tooth tip spacing S before adjustment, the necessity of an adjusting plate 74 and its thickness are determined, and an appropriate adjusting plate 74 is inserted between the toggle block 6 and the front end of the rear support member 71.

[0051] (Figure 3(d)) Next, the hydraulic cylinder 72 is fully retracted, and in this state, the nut 95 of the tension mechanism 9 is tightened. Then, a sufficient tensile force acts on the jaw 11 via the tension rod 91, and the desired tooth tip spacing S can be obtained.

[0052] After adjusting the tooth tip spacing in this way, the distance from the reflector 86 to the measuring device 81 is measured. As a result, the tooth tip spacing S after adjustment can be calculated by the calculation unit 83 and displayed by the display unit 84. In this way, the operator can check the tooth tip spacing S after adjustment.

[0053] In this embodiment, if the measuring device 81 gets in the way during the tooth tip spacing adjustment work, the measuring device 81 can be temporarily removed. This makes it possible to improve the efficiency of the tooth tip adjustment work. Another advantage is that it reduces design constraints on the jaw crusher 1.

[0054] In this embodiment, the reflector 86 is attached to the toggle block 6 by a magnet, which has the advantage that the reflector 86 can be easily attached and detached.

[0055] In this embodiment, the reflector 86 can be installed while its position is measured by the positioning meter 82, so there is no need to indicate the installation position on the toggle block 6. Therefore, there is an advantage that even if the toggle block 6 becomes dirty during the crushing work, the installation work of the reflector 86 is not hindered.

[0056] It should be noted that the present invention is not limited to the above-described embodiment, and various modifications may be made to the specific configuration of the present invention within the scope of the claims. [Explanation of symbols]

[0057] 1 Jaw crusher 11 Joe 12 Eccentric shaft 13 Pulley 2 Main unit 21 Cheek plate 22 Fixed wall 3 Fixed teeth 4 Moving teeth 5 Toggle Plate 6 Toggle Block 7 Tooth tip adjustment mechanism 71 Rear support member 72 Hydraulic cylinder 73 Push rod 74 Adjustment plate 8 Tooth tip spacing measuring device 81 Measuring instruments 82 Positioning device 83 Arithmetic section 84 Display section 85 Installation tools 85a Front abutment part 85b Rear contact part 86 Reflector 9 Tension mechanism 91 Tension rod 92 Compression spring 93 Spring holder 94 Spring support member 95 Nut L laser light S Tooth tip spacing

Claims

1. A tooth tip distance measuring device for measuring a tooth tip distance between a fixed tooth and a movable tooth in a jaw crusher for crushing an object to be crushed by a fixed tooth fixed to a main body side and a movable tooth that oscillates relative to the fixed tooth, The jaw crusher includes a toggle plate for limiting the swing position of the movable teeth, a toggle block for regulating the position of the toggle plate, and a tooth tip adjustment mechanism for moving the toggle block, the tooth tip spacing measuring device includes a measuring device for measuring the tooth tip spacing based on the position of the toggle block; The measuring device has a positioning meter that measures the position of the toggle block, and a calculation unit that calculates the tooth tip interval from the measurement value of the positioning meter, and the measuring device is detachable from the main body. Tooth tip spacing measuring device.

2. The measuring device further includes a display unit that displays the calculated tooth tip distance.

2. The tooth tip spacing measuring device according to claim 1.

3. Further provided is an installation tool that is detachably attached to the main body side, The installation tool is configured to position the measuring device relative to the main body by bringing the measuring device into contact with the installation tool when the installation tool is attached to the main body.

3. The tooth tip distance measuring device according to claim 1 or 2.

4. The toggle block further includes a reflector detachably attached thereto, The positioning device is configured to measure the position of the toggle block by measuring the distance to the reflector attached to the toggle block.

3. The tooth tip distance measuring device according to claim 1 or 2.

5. The tooth tip adjustment mechanism further includes a rear support member fixed to the main body side, The installation tool is detachably attached to the rear support member, and is thereby attached to the main body side. The measuring device is positioned by contacting the installation tool and is removably attached to the rear support member, thereby making it detachable from the main body. The tooth tip distance measuring device according to claim 3.

6. A tooth tip spacing adjustment method using the tooth tip spacing measurement device according to claim 1, When the object to be crushed is crushed by the jaw crusher, the measuring device is separated from the main body side, When measuring the tooth tip distance, the measuring device is attached to the main body, the position of the toggle block is measured by the positioning meter, and the tooth tip distance is calculated by the calculation unit from the measurement value of the positioning meter. How to measure the tooth tip spacing of a jaw crusher.

7. A tooth tip spacing adjustment method using the tooth tip spacing measuring device according to claim 4, When the object to be crushed is crushed by the jaw crusher, the measuring device is separated from the main body side, When measuring the tooth tip spacing, a step of attaching the measuring device to the main body; a step of moving the toggle block to set the tooth tip interval to 0, and measuring the distance from the reflector to the measuring device at this time using the position measuring device; a step of adjusting the tooth tip spacing to a target tooth tip spacing based on a distance from the reflector to the measuring device when the tooth tip spacing is 0; and calculating the adjusted tooth tip spacing by the calculation unit by measuring the distance from the reflector to the measuring device after adjusting the tooth tip spacing. How to measure the tooth tip spacing of a jaw crusher.

8. A jaw crusher having the tooth tip distance measuring device according to claim 1.

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