A movable jaw assembly of a jaw crusher

Abstract

The application discloses a movable jaw assembly of a jaw crusher. The device comprises the following parts: a semicircular groove is arranged on one side of a movable jaw plate facing an elbow plate; a semicircular arc surface is arranged on the inner side of a limiting ring, the limiting ring is arranged on the semicircular groove in a spaced manner, the semicircular arc surface and the semicircular groove form a complete inner circular surface; a pin hole is arranged on the limiting ring; a plurality of connecting plates are arranged on a hinge shaft in a spaced manner, the spacing distance between the connecting plates is greater than the width of the limiting ring; the elbow plate lining seat is in the form of a ring and is arranged in the inner circular surface, the outer surface of the elbow plate lining seat is tightly attached to the inner circular surface, and a pin groove is formed in the elbow plate lining seat; a positioning pin is inserted into the pin groove through the pin hole; the hinge shaft is coaxially arranged with the inner ring surface of the elbow plate lining seat, the hinge shaft is tightly attached to the inner ring surface of the elbow plate lining seat, the hinge shaft can rotate around the central shaft of the hinge shaft in the inner ring surface of the elbow plate lining seat, and the connecting plates extend from the spacing between the limiting rings. The application can increase the contact area of the elbow plate lining seat and the movable jaw plate and improve the stability of the connection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crushers, in particular to a movable jaw assembly of a jaw crusher. BACKGROUND

[0002] The jaw crusher is also called tiger mouth, which is composed of two jaw plates, i.e., a stationary jaw plate and a movable jaw plate, and is a kind of crusher that simulates the movement of the two jaws of an animal to complete the crushing operation of materials, and is widely used in the crushing of various ores and large blocks of materials in the mining, smelting, building materials, highway, railway, water conservancy and chemical industries.

[0003] The jaw crusher is internally provided with an elbow plate for transmitting power and serving as a safety device, one end of the elbow plate is connected to the movable jaw plate through an elbow plate liner, a semicircular groove is formed on the movable jaw plate, the elbow plate liner is fixed in the semicircular groove through a positioning pin, the positioning pin is arranged at the bottom of the groove, one end of the elbow plate is hinged to the elbow plate liner to realize the connection of the elbow plate and the movable jaw plate, and the other end of the elbow plate is connected to an adjusting device. However, this connection mode has many disadvantages, the contact area between the semicircular groove and the elbow plate liner is small, which easily leads to accelerated wear and easy disengagement, affecting the stability of the connection, and the positioning pin is located at the bottom of the groove, making the installation and maintenance difficult, and the pin is prone to loosening due to vibration during the crushing process, leading to unstable operation of the equipment.

[0004] For example, a movable jaw body of a jaw crusher disclosed in the authorized announcement CN 204017884 U is provided with a groove on the movable jaw, and an elbow plate liner is installed in the groove through a fixing bolt, and the elbow plate and the elbow plate liner are connected to each other, the contact area between the elbow plate liner and the groove is small in this connection mode, the connection is unstable, and the installation position of the fixing bolt is located at the bottom of the groove, making the installation and maintenance difficult. SUMMARY

[0005] The present application aims to overcome the deficiencies of the prior art, and provides a movable jaw assembly of a jaw crusher, which can increase the contact area between the elbow plate liner and the movable jaw plate, improve the stability of the connection, reduce the difficulty of installation and maintenance, and improve the operation stability of the overall device.

[0006] To achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0007] A movable jaw assembly of a jaw crusher, comprising a movable jaw plate, an elbow plate, an elbow plate liner and a positioning pin.

[0008] A semicircular groove is arranged on the side of the movable jaw plate facing the elbow plate, and a plurality of limiting rings are arranged on the movable jaw plate; the inner side of the limiting ring is a semicircular arc surface, the limiting rings are arranged on the semicircular groove at intervals, and the semicircular arc surface on the inner side of the limiting ring and the semicircular groove form a plurality of complete inner circular surfaces; a pin hole is arranged on the limiting ring.

[0009] The elbow plate comprises a hinge shaft and connecting plates, the connecting plates are arranged on the hinge shaft at intervals, and the interval distance between the connecting plates is greater than the width of the limiting ring.

[0010] The elbow plate liner is circular and arranged in the inner circular surface, the elbow plate liner is coaxial with the inner circular surface, the outer ring surface of the elbow plate liner is in close contact with the inner circular surface, and the width of the elbow plate liner is not greater than the width of the limiting ring.

[0011] The positioning pin is inserted into the pin slot through the pin hole, so as to realize the positioning of the elbow plate liner on the moving jaw plate.

[0012] The hinge shaft passes through the inner ring surface of the elbow plate liner, the hinge shaft is coaxial with the inner ring surface of the elbow plate liner, the hinge shaft is in close contact with the inner ring surface of the elbow plate liner, the hinge shaft can rotate around the center axis of the hinge shaft in the inner ring surface of the elbow plate liner, forming the connection between the elbow plate and the moving jaw plate, and the connecting plate extends from the interval between the limiting rings.

[0013] Preferably, the limiting ring is integrally arranged with the moving jaw plate.

[0014] Preferably, the material of the elbow plate liner is ZGMn13, which is a high manganese cast steel with good wear resistance and toughness.

[0015] Preferably, the width of the semicircular groove is greater than the length of the hinge shaft.

[0016] Preferably, the connecting plate is welded on the hinge shaft.

[0017] Preferably, the height of the connecting plate is 0.5-0.7 times the diameter of the hinge shaft.

[0018] Preferably, the connecting plate is detachably connected with the hinge shaft, buckled, threaded or connected in other detachable ways.

[0019] Preferably, the connecting plate is threaded with the hinge shaft.

[0020] Preferably, the hinge shaft is provided with a plurality of threaded holes, one end of the connecting plate is provided with a stud, the stud is threaded with the threaded hole, and the hinge shaft and the connecting plate are convenient to disassemble.

[0021] Preferably, the hinge shaft is provided with a plurality of grooves, the inner bottom surface of the groove is a plane, the threaded hole is arranged on the inner bottom surface of the groove, one end of the connecting plate is provided with a stud, the stud is threaded with the threaded hole, the plane at the bottom of the stud is in contact with the inner bottom surface of the groove, the plane at the bottom of the stud can rotate around the threaded hole on the inner bottom surface of the groove, and the edge of the groove does not hinder the rotation of the plane at the bottom of the stud, further ensuring the connection stability of the hinge shaft and the connecting plate.

[0022] Preferably, the depth of the threaded hole is 0.4-0.6 of the diameter of the hinge shaft.

[0023] Preferably, the depth of the threaded hole is 0.5 of the diameter of the hinge shaft.

[0024] The depth of the threaded hole on the hinge shaft has a great influence on the connection stability of the connecting plate and the hinge shaft, the processing difficulty, and the maintenance convenience. If the threaded hole is too deep, the stress distribution near the threaded hole on the hinge shaft will be affected, and then the fatigue life of the hinge shaft will be affected, and the processing difficulty and cost and the maintenance difficulty will be increased. If the threaded hole is too shallow, the connection strength and the connection stability of the connecting plate and the hinge shaft will be reduced.

[0025] Preferably, the center line of the threaded hole is perpendicular to the center axis of the hinge shaft.

[0026] The present application has the beneficial effects that:

[0027] The present application increases the contact area of the knee plate liner and the moving jaw plate by setting the semicircular groove on the moving jaw plate, forming the inner circular surface with the limiting ring and the semicircular groove, and placing the annular knee plate liner in the inner circular surface, thereby improving the connection stability.

[0028] The present application reduces the installation and maintenance difficulty and improves the operation stability of the overall device by setting the pin hole on the limiting ring, setting the positioning pin on the side facing the knee plate, and inserting the positioning pin into the pin groove through the pin hole.

[0029] By adopting the above scheme, the present application increases the contact area of the knee plate liner and the moving jaw plate, improves the connection stability, reduces the installation and maintenance difficulty, and improves the operation stability of the overall device. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative labor.

[0031] Figure 1 is the overall structure diagram of the moving jaw assembly.

[0032] Figure 2 is Figure 1 is the sectional view of A-A in FIG.

[0033] Figure 3 is the exploded view of the knee plate in the second embodiment.

[0034] Figure 4 is the exploded view of the knee plate in the third embodiment.

[0035] In the figure, 1-moving jaw plate, 2-elbow plate, 3-elbow plate bushing, 4-locating pin, 11-semi-circular groove, 12-limiting ring, 121-pin hole, 21-hinge shaft, 22-connecting plate, 211-threaded hole, 212-groove, 221-stud. Detailed Implementation

[0036] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] First embodiment:

[0041] like Figures 1-2 As shown, a moving jaw assembly for a jaw crusher includes a moving jaw plate 1, an elbow plate 2, an elbow plate liner 3, and a positioning pin 4.

[0042] The movable jaw plate 1 has a semi-circular groove 11 on the side facing the elbow plate 2, and the movable jaw plate 1 has a plurality of limiting rings 12; the inner side of the limiting ring 12 is a semi-circular arc surface, and the limiting rings 12 are spaced apart on the semi-circular groove 11, and the semi-circular arc surface on the inner side of the limiting ring 12 and the semi-circular groove 11 form a plurality of inner circular surfaces; the limiting ring 12 has a pin hole 121.

[0043] The elbow plate 2 comprises a hinge shaft 21 and a plurality of connecting plates 22, which are arranged on the hinge shaft 21 at intervals, and the interval distance between the connecting plates 22 is greater than the width of the limiting ring 12.

[0044] The elbow plate liner 3 is annular and is arranged in the inner circular surface. The elbow plate liner 3 is coaxially arranged with the inner circular surface, the outer annular surface of the elbow plate liner 3 is tightly attached to the inner circular surface, and the width of the elbow plate liner 3 is not greater than the width of the limiting ring 12. The pin slot is formed in the elbow plate liner 3.

[0045] The positioning pin 4 is inserted into the pin slot through the pin hole 121, so as to position the elbow plate liner 3 on the movable jaw plate 1.

[0046] The hinge shaft 21 passes through the inner annular surface of the elbow plate liner 3. The hinge shaft 21 is coaxially arranged with the inner annular surface of the elbow plate liner 3 and is tightly attached to the inner annular surface of the elbow plate liner 3. The hinge shaft 21 can rotate around the center axis of the hinge shaft 21 in the inner annular surface of the elbow plate liner 3. The connecting plate 22 extends from the interval between the limiting rings 12.

[0047] Second embodiment:

[0048] As shown in Figures 1-2 A jaw crusher movable jaw assembly comprises a movable jaw plate 1, an elbow plate 2, an elbow plate liner 3 and a positioning pin 4.

[0049] The side of the movable jaw plate 1 facing the elbow plate 2 is provided with a semicircular groove 11. A plurality of limiting rings 12 are arranged on the movable jaw plate 1. The inner side of the limiting ring 12 is a semicircular arc surface. The limiting rings 12 are arranged at intervals on the semicircular groove 11. The semicircular arc surface on the inner side of the limiting ring 12 and the semicircular groove 11 form a plurality of inner circular surfaces. The limiting ring 12 is provided with a pin hole 121.

[0050] The elbow plate 2 comprises a hinge shaft 21 and a plurality of connecting plates 22, which are arranged on the hinge shaft 21 at intervals, and the interval distance between the connecting plates 22 is greater than the width of the limiting ring 12.

[0051] The elbow plate liner 3 is annular and is arranged in the inner circular surface. The elbow plate liner 3 is coaxially arranged with the inner circular surface, the outer annular surface of the elbow plate liner 3 is tightly attached to the inner circular surface, and the width of the elbow plate liner 3 is not greater than the width of the limiting ring 12. The pin slot is formed in the elbow plate liner 3.

[0052] The positioning pin 4 is inserted into the pin slot through the pin hole 121, so as to position the elbow plate liner 3 on the movable jaw plate 1.

[0053] The hinge shaft 21 passes through the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is coaxially arranged with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is in close contact with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 can rotate around the central axis of the hinge shaft 21 within the inner ring surface of the elbow plate bushing 3. The connecting plate 22 extends out from the gap between the limiting rings 12.

[0054] like Figure 3 As shown, the hinge shaft 21 is provided with multiple threaded holes 211, and one end of the connecting plate 22 is provided with a stud 221. The stud 221 is threadedly connected to the threaded holes 211, which facilitates the disassembly of the hinge shaft 21 and the connecting plate 22.

[0055] Third embodiment:

[0056] like Figures 1-2 As shown, a moving jaw assembly for a jaw crusher includes a moving jaw plate 1, an elbow plate 2, an elbow plate liner 3, and a positioning pin 4.

[0057] The movable jaw plate 1 has a semi-circular groove 11 on the side facing the elbow plate 2, and the movable jaw plate 1 has a plurality of limiting rings 12; the inner side of the limiting ring 12 is a semi-circular arc surface, and the limiting rings 12 are spaced apart on the semi-circular groove 11, and the semi-circular arc surface on the inner side of the limiting ring 12 and the semi-circular groove 11 form a plurality of inner circular surfaces; the limiting ring 12 has a pin hole 121.

[0058] The elbow plate 2 includes a hinge shaft 21 and a connecting plate 22. Multiple connecting plates 22 are provided and spaced apart on the hinge shaft 21. The spacing between the connecting plates 22 is greater than the width of the limiting ring 12.

[0059] The elbow plate bushing 3 is annular and placed inside the inner circular surface. The elbow plate bushing 3 is coaxially arranged with the inner circular surface. The outer circular surface of the elbow plate bushing 3 is in close contact with the inner circular surface. The width of the elbow plate bushing 3 is not greater than the width of the limiting ring 12. The elbow plate bushing 3 has a pin groove.

[0060] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to achieve the positioning of the elbow plate liner 3 on the moving jaw plate 1.

[0061] The hinge shaft 21 passes through the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is coaxially arranged with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is in close contact with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 can rotate around the central axis of the hinge shaft 21 within the inner ring surface of the elbow plate bushing 3. The connecting plate 22 extends out from the gap between the limiting rings 12.

[0062] like Figure 4As shown, the hinge shaft 21 is provided with multiple grooves 212, the bottom surface of the groove 212 is a plane, and a threaded hole 211 is provided on the bottom surface of the groove 212. One end of the connecting plate 22 is provided with a stud 221, which is threadedly connected to the threaded hole 211. The plane where the bottom of the stud 221 is located is in contact with the bottom surface of the groove 212. The plane where the bottom of the stud 221 is located can rotate around the threaded hole 211 on the bottom surface of the groove 212. The edge of the groove 212 will not hinder the rotation of the plane where the bottom of the stud 221 is located, further ensuring the connection stability of the hinge shaft 21 and the connecting plate 22.

[0063] The depth of the threaded hole is 0.4 to 0.6 times the diameter of the hinge shaft 21.

[0064] The depth of the threaded hole on the hinge shaft has a significant impact on the connection stability, processing difficulty, and maintenance convenience of the connecting plate and the hinge shaft. If the threaded hole is too deep, it will affect the stress distribution near the threaded hole on the hinge shaft, thereby affecting the fatigue life of the hinge shaft, and also increasing the processing difficulty, cost, and maintenance difficulty. If the threaded hole is too shallow, it will reduce the connection strength and connection stability of the connecting plate and the hinge shaft.

[0065] Fourth embodiment:

[0066] like Figures 1-2 As shown, a moving jaw assembly for a jaw crusher includes a moving jaw plate 1, an elbow plate 2, an elbow plate liner 3, and a positioning pin 4.

[0067] The movable jaw plate 1 has a semi-circular groove 11 on the side facing the elbow plate 2, and the movable jaw plate 1 has a plurality of limiting rings 12; the inner side of the limiting ring 12 is a semi-circular arc surface, and the limiting rings 12 are spaced apart on the semi-circular groove 11, and the semi-circular arc surface on the inner side of the limiting ring 12 and the semi-circular groove 11 form a plurality of inner circular surfaces; the limiting ring 12 has a pin hole 121.

[0068] The elbow plate 2 includes a hinge shaft 21 and a connecting plate 22. Multiple connecting plates 22 are provided and spaced apart on the hinge shaft 21. The spacing between the connecting plates 22 is greater than the width of the limiting ring 12.

[0069] The elbow plate bushing 3 is annular and placed inside the inner circular surface. The elbow plate bushing 3 is coaxially arranged with the inner circular surface. The outer circular surface of the elbow plate bushing 3 is in close contact with the inner circular surface. The width of the elbow plate bushing 3 is not greater than the width of the limiting ring 12. The elbow plate bushing 3 has a pin groove.

[0070] The positioning pin 4 passes through the pin hole 121 and is inserted into the pin groove to achieve the positioning of the elbow plate liner 3 on the moving jaw plate 1.

[0071] The hinge shaft 21 passes through the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is coaxially arranged with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 is in close contact with the inner ring surface of the elbow plate bushing 3. The hinge shaft 21 can rotate around the central axis of the hinge shaft 21 within the inner ring surface of the elbow plate bushing 3. The connecting plate 22 extends out from the gap between the limiting rings 12.

[0072] like Figure 4 As shown, the hinge shaft 21 is provided with multiple grooves 212, the bottom surface of the groove 212 is a plane, and a threaded hole 211 is provided on the bottom surface of the groove 212. One end of the connecting plate 22 is provided with a stud 221, which is threadedly connected to the threaded hole 211. The plane where the bottom of the stud 221 is located is in contact with the bottom surface of the groove 212. The plane where the bottom of the stud 221 is located can rotate around the threaded hole 211 on the bottom surface of the groove 212. The edge of the groove 212 will not hinder the rotation of the plane where the bottom of the stud 221 is located, further ensuring the connection stability of the hinge shaft 21 and the connecting plate 22.

[0073] The depth of the threaded hole is 0.5 times the diameter of the hinge shaft 21.

[0074] The depth of the threaded hole on the hinge shaft has a significant impact on the connection stability, processing difficulty, and maintenance convenience of the connecting plate and the hinge shaft. If the threaded hole is too deep, it will affect the stress distribution near the threaded hole on the hinge shaft, thereby affecting the fatigue life of the hinge shaft, and also increasing the processing difficulty, cost, and maintenance difficulty. If the threaded hole is too shallow, it will reduce the connection strength and connection stability of the connecting plate and the hinge shaft.

[0075] The following experiments were conducted regarding the technical solutions of the third and fourth embodiments:

[0076] Different elbow plates are designed, with varying threaded hole depths on the hinge shaft. These threaded hole depths are 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, and 0.9 times the hinge shaft diameter, respectively, while all other conditions remain the same. The threaded holes on the same hinge shaft are consistent. A connecting plate with a stud is threaded into the threaded hole, with the stud height matching the threaded hole depth.

[0077] The elbow plate, consisting of the hinge shaft and the connecting plate, is connected to the moving jaw plate through the same elbow plate bushing.

[0078] The jaw crusher was subjected to dynamic tests using a series of moving jaw components provided in this experiment. During the crushing operation, the hinge shaft rotated within the toggle plate liner. Under the same working environment, the connection stability of different toggle plates was tested.

[0079] Table 1 Fatigue test data for different elbow plates

[0080]

[0081] Fatigue failure includes damage to the hinge shaft or connecting plate at the connection point itself, while connection failure is the breakage of the connection between the hinge shaft and the connecting plate.

[0082] As shown in Table 1, when the thread hole depth is 0.1~0.3d and 0.7~0.9d, the continuous working time before fatigue failure or connection failure occurs is less than 200 hours, which does not meet the working requirements of the jaw crusher, resulting in high maintenance costs and poor economic efficiency. However, when the thread hole depth is 0.4~0.6d, the continuous working time before fatigue failure or connection failure occurs is more than 200 hours, which meets the working requirements of the jaw crusher, resulting in low maintenance costs and good economic efficiency. In particular, when the thread hole depth is 0.5d, the continuous working time before fatigue failure or connection failure occurs reaches as high as 298 hours, indicating that the connection strength and stability between the hinge shaft and the connecting plate on the elbow plate are the strongest, while the maintenance cost is minimized, resulting in the best economic efficiency.

[0083] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A moving jaw assembly for a jaw crusher, comprising a moving jaw plate, an elbow plate, an elbow plate bushing, and a positioning pin, characterized in that: The movable jaw plate has a semi-circular groove on the side facing the elbow plate, and multiple limiting rings are provided on the movable jaw plate; the inner side of the limiting ring is a semi-circular arc surface, and the limiting rings are spaced apart on the semi-circular groove, forming a complete inner circular surface; the limiting ring has a pin hole; the elbow plate includes a hinge shaft and a connecting plate, and multiple connecting plates are provided, spaced apart on the hinge shaft, with the spacing between the connecting plates being greater than the width of the limiting ring; the elbow plate bushing is annular and placed inside the inner circular surface, with the outer ring surface of the elbow plate bushing in close contact with the inner circular surface, and a pin groove is opened on the elbow plate bushing; the positioning pin passes through the pin hole and is inserted into the pin groove; the hinge shaft is coaxially arranged with the inner ring surface of the elbow plate bushing, and the hinge shaft is in close contact with the inner ring surface of the elbow plate bushing, allowing the hinge shaft to rotate around the central axis of the hinge shaft within the inner ring surface of the elbow plate bushing, and the connecting plate extends out from the gap between the limiting rings.

2. The jaw crusher motorized jaw assembly according to claim 1, characterized in that: The limiting ring is integrally formed with the moving jaw plate.

3. The jaw crusher motorized jaw assembly according to claim 1, characterized in that: The material of the elbow plate bushing is ZGMn13.

4. The jaw crusher motorized jaw assembly according to claim 1, characterized in that: The width of the semi-circular groove is greater than the length of the hinge shaft.

5. A jaw crusher motorized jaw assembly according to claim 1, characterized in that: The connecting plate is detachably connected to the hinge shaft.

6. A jaw crusher motorized jaw assembly according to claim 5, characterized in that: The connecting plate is threadedly connected to the hinge shaft.

7. A jaw crusher motorized jaw assembly according to claim 6, characterized in that: The hinge shaft is provided with multiple threaded holes, and one end of the connecting plate is provided with a stud, which is threadedly connected to the threaded holes.

8. A jaw crusher motorized jaw assembly according to claim 6, characterized in that: The hinge shaft is provided with multiple grooves, the bottom surface of the groove is a plane, and a threaded hole is provided on the bottom surface of the groove. One end of the connecting plate is provided with a stud, which is threadedly connected to the threaded hole. The plane where the bottom of the stud is located is in contact with the bottom surface of the groove, and the plane where the bottom of the stud is located can rotate around the threaded hole on the bottom surface of the groove.

9. A jaw crusher motorized jaw assembly according to claim 7 or 8, characterized in that: The centerline of the threaded hole is perpendicular to the centerline of the hinge shaft; the depth of the threaded hole is 0.4 to 0.6 times the diameter of the hinge shaft.

10. A jaw crusher motorized jaw assembly according to claim 9, characterized in that: The depth of the threaded hole is 0.5 times the diameter of the hinge shaft.

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