Exciting force adjustable eccentric block type vibration box of cement block making machine

Abstract

The utility model discloses an exciting-force-adjustable eccentric block type vibration box of a cement block making machine. The exciting-force-adjustable eccentric block type vibration box comprises a shell, the multiple pairs of shaft bodies are arranged in parallel, the two ends of each shaft body are rotationally arranged on the shell in a sealed mode, and the two ends of each shaft body penetrate out of the shell; one pair of eccentric blocks is detachably fixed to the part, located outside the shell, of one shaft body; and the synchronous driving assembly drives the shaft body to rotate synchronously. The bearing has the beneficial effects that the lubrication and heat dissipation effects of the bearing are improved, and the exciting force is adjustable.

Description

Technical Field

[0001] The utility model relates to the technical field of cement block machinery and equipment, and more specifically, to an eccentric block type vibration box with adjustable exciting force for a cement block forming machine. Background Art

[0002] The existing cement block forming machine vibration box mainly adopts a shell seal, two integrated eccentric shafts are located in the sealed shell, bearings are installed at both ends, and synchronous gears are used to rotate synchronously to generate exciting force to achieve the purpose of vibration. This driving method has the following shortcomings:

[0003] 1. Insufficient bearing lubrication, heat dissipation, and easy fracture of the eccentric shaft: The vibration box has a very high speed when working, reaching more than 4500 revolutions per minute, and the surface of the oil cannot contact the eccentric shaft. Otherwise, when the eccentric shaft rotates, the eccentric part hits the oil and generates impact force. Based on the physical definition and calculation formula of impact force Ft = ΔMv, the exciting force calculation formula F = meω 2 , where F represents the exciting force of the eccentric block, m represents the weight of the eccentric block, e represents the distance between the center of mass of the eccentric block and the shaft (i.e., the eccentric distance), and ω represents the angular velocity. Under such high-speed rotation, the collision of the eccentric part with the oil will generate a huge impact force and cause a huge reverse torque, which makes the eccentric shaft very easy to break; therefore, the oil must be lower than the maximum outer diameter of the eccentric shaft, which also makes it impossible to fully immerse the bearings at both ends of the eccentric shaft, and the centrifugal force generated by the high-speed rotation of the bearing increases the difficulty of oil entering the bearing, resulting in insufficient bearing lubrication and heat dissipation, and ultimately shortening the service life of the bearing and making it very easy to be damaged.

[0004] 2. The motor is easy to damage and consumes a lot of energy, which is not conducive to energy saving: From the reasons mentioned in point 1, we know that due to the impact force, the load of the driving motor of the vibration box will become very large, which can easily cause the motor to heat up and burn. If you want to overcome the overload and heating of the motor, you need to increase the power of the motor, which will increase the power consumption, which is not conducive to energy saving and environmental protection.

[0005] 3. The eccentricity of the eccentric shaft is fixed and cannot be adjusted: the eccentric shaft is processed as an integral part, and the eccentric part is cut and processed by using the center of the main shaft (the part concentric with the bearings at both ends) to deviate a certain size. If the deviation size of the eccentric part needs to be adjusted, the whole eccentric shaft needs to be replaced. To find the appropriate eccentric size, it is necessary to replace it several times, which is not only inconvenient, but also requires the processing of multiple eccentric shafts, resulting in a waste of resources. Utility Model Content

[0006] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0007] In order to achieve these purposes and other advantages according to the utility model, a cement block forming machine eccentric block type vibration box with adjustable excitation force is provided, comprising:

[0008] case;

[0009] A plurality of pairs of shaft bodies, the plurality of pairs of shaft bodies are arranged in parallel, and both ends of the shaft bodies are sealed and rotatably arranged on the shell, and both ends pass through the outside of the shell;

[0010] A plurality of pairs of eccentric blocks, wherein a pair of eccentric blocks is detachably fixed to a portion of a shaft body located outside the housing;

[0011] A synchronous drive assembly drives the shaft to rotate synchronously.

[0012] Preferably, the eccentric block is fan-shaped, and an axial hole is provided on the eccentric block, and the axial hole is a spline hole;

[0013] One section of the shaft body located outside the shell is set as a spline shaft, an annular abutment seat is convexly provided on the end of the spline shaft close to the shell, a thread is set on the end away from the shell, and a clamping cover is screwed, the shaft hole is adapted to be set on the spline shaft, and the two side surfaces of the eccentric block are respectively abutted against the abutment seat and the clamping cover.

[0014] Preferably, the eccentric block is provided with a slit along its radial direction connecting the axial hole to the edge, and the eccentric block is provided with at least one locking threaded countersunk hole passing through the slit along a surface perpendicular to the slit, and a locking bolt is threaded on the threaded countersunk hole.

[0015] Preferably, a plurality of pairs of bearings are provided on the side wall of the shell, and both ends of an axle body are sealed and fixed on a pair of bearings, and a bearing end cover is sleeved on one side of the bearing located outside the shell.

[0016] Preferably, the synchronous drive assembly comprises:

[0017] A pair of pulleys, the pair of pulleys are coaxially sleeved and fixed on a pair of shafts located at the center and are located on the same side of the exterior of the housing, and the pair of pulleys are sleeved with a V-belt;

[0018] The motor has an output shaft coaxially fixed to the shaft body where one of the pulleys is located;

[0019] A plurality of gears, one gear is coaxially sleeved and fixed on a shaft body and is located in the housing, and the gears on two adjacent shaft bodies are in a gear meshing state.

[0020] Preferably, the end of the shaft body on which the pulley is provided is provided with a radially arranged limit key;

[0021] The inner side wall of the pulley is provided with a limit groove along the axial depression, and the limit key is clamped in the limit groove.

[0022] The utility model at least has the following beneficial effects:

[0023] First, add lubricating oil into the housing. Since there is no eccentric block in the housing, there will be no impact force with the lubricating oil. Only a small amount of exhaust cavity needs to be reserved so that most of the bearing can be immersed in the lubricating oil, thereby significantly improving the lubrication and heat dissipation of the bearing.

[0024] Second, the exciting force is calculated by the formula F = meω 2 , where F represents the exciting force of the eccentric block, m represents the weight of the eccentric block, e represents the distance between the center of mass of the eccentric block and the shaft (i.e., the eccentricity), and ω represents the angular velocity. It can be deduced that the exciting force is directly related to the mass, rotation speed, phase angle, etc. of the eccentric block. Therefore, when the rotation speed, mass of the eccentric block, and eccentricity remain unchanged, the exciting force can be adjusted by adjusting the phase angle appropriately.

[0025] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the vibration box according to one of the technical solutions of the utility model;

[0027] Figure 2 This is a schematic diagram of the interior of the vibration box according to one of the technical solutions of the utility model;

[0028] Figure 3 A side detail view of the bearing, the gear, and the eccentric block according to one technical solution of the utility model;

[0029] Figure 4 The phase angle interpretation diagram of one of the technical solutions of the utility model;

[0030] Figure 5 A radial cross-sectional view of the eccentric block of one of the technical solutions of the utility model;

[0031] Figure 6 A detailed view of a shaft body used to connect the pulley according to one of the technical solutions of the utility model;

[0032] Figure 7 This is a detailed view of a shaft body that does not need to be connected to a pulley according to one of the technical solutions of the utility model.

[0033] The explanations of the figures in the specification are as follows: housing 1, shaft 2, eccentric block 3, synchronous drive assembly 4, bearing 11, bearing end cover 12, lubricating oil liquid level 13, spline shaft 21, abutment seat 22, limit key 23, shaft hole 31, slit 32, locking threaded countersunk hole 33, locking bolt 34, pulley 41, gear 42, limit groove 43, phase angle 5. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0035] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] like Figures 1 to 7 As shown, the utility model provides an eccentric block type vibration box with adjustable exciting force for a cement block forming machine, comprising:

[0037] Shell 1: Shell 1 is used to form a vibrating body, and lubricating oil is contained in shell 1 to play a role in lubrication and heat dissipation.

[0038] Multiple pairs of shaft bodies 2 are arranged in parallel, and both ends of the shaft bodies 2 are sealed and rotatably arranged on the shell 1, and both ends pass through the outside of the shell 1; specifically, the shaft bodies 2 can be arranged in two pairs, that is, forming a four-axis vibration box. Each pair of shaft bodies 2 forms a group of vibration bodies.

[0039] A plurality of pairs of eccentric blocks 3, a pair of eccentric blocks 3 can be detachably fixed to a portion of a shaft body 2 located outside the housing 1; after the eccentric blocks 3 are fixed, the shaft body 2 and the eccentric blocks 3 can form an eccentric shaft, which can generate an exciting force when rotating, and the magnitude of the exciting force generated can be adjusted by adjusting the angle between two adjacent pairs of eccentric blocks 3. Specifically, the eccentric blocks 3 can be clamped and fixed between a pair of clamping plates by providing a pair of threaded clamping plates on the shaft body 2. A more optimal detachable fixing method is listed in detail later in this application.

[0040] The synchronous drive assembly 4 drives the shaft body 2 to rotate synchronously. It is used to make the shaft body 2 rotate synchronously and at the same frequency, so that multiple shaft bodies 2 form a whole, thereby generating synchronous and frequency exciting forces. Specifically, the synchronous drive assembly 4 can use a belt drive method to achieve synchronous drive.

[0041] In the above technical solution, lubricating oil is added into the housing 1, such as Figure 3 The lubricating oil level 13 shown in the figure does not generate impact force with the lubricating oil because there is no eccentric block 3 in the housing 1. Only a small amount of exhaust cavity needs to be reserved, so that most of the bearing 11 can be immersed in the lubricating oil, and then the lubrication and heat dissipation of the bearing 11 are significantly improved. Starting the synchronous drive component 4 can make multiple pairs of shaft bodies 2 rotate at the same frequency, thereby driving the eccentric block 3 to rotate and generate exciting force to achieve the purpose of vibration. The exciting force calculation formula F=meω 2 , where F represents the exciting force of the eccentric block 3, m represents the weight of the eccentric block 3, e represents the distance between the center of mass of the eccentric block 3 and the shaft 2 (i.e., the eccentricity), and ω represents the angular velocity. It can be deduced that the exciting force is directly related to the mass, rotation speed, phase angle 5, etc. of the eccentric block 3. Therefore, when the rotation speed, mass, and eccentricity of the eccentric block 3 remain unchanged, the exciting force can be adjusted by adjusting the phase angle 5 appropriately. Figure 4 As shown, the eccentric mass 3 can be installed at different phase angles 5 to obtain the required exciting force.

[0042] In another technical solution, the eccentric block 3 is fan-shaped, and an axial hole 31 is opened on the eccentric block 3, and the axial hole 31 is a spline hole;

[0043] One section of the shaft body 2 located outside the shell 1 is set as a spline shaft 21. The spline shaft 21 is provided with an annular abutment seat 22 on one end close to the shell 1, and a thread is set on the end away from the shell 1, and a clamping cover is screwed. The shaft hole 31 is adapted to be mounted on the spline shaft 21, and the two side surfaces of the eccentric block 3 are respectively abutted against the abutment seat 22 and the clamping cover.

[0044] In the above technical solution, by setting the connection mode between the spline hole and the spline shaft 21, not only can the eccentric block 3 be adjusted by 5 degrees in multiple phase angles, thereby achieving multiple adjustments of the exciting force, but also the eccentric block 3 can be prevented from radially rotating relative to the shaft body 2. The eccentric block 3 can be prevented from axially moving relative to the shaft body 2 by setting the abutment seat 22 and the clamping cover.

[0045] In another technical solution, the eccentric block 3 is provided with a slit 32 along its radial direction connecting the axial hole 31 to the edge, and the eccentric block 3 is provided with at least one locking threaded countersunk hole 33 passing through the slit 32 along a surface perpendicular to the slit 32, and a locking bolt 34 is screwed on the threaded countersunk hole.

[0046] If the eccentric block 3 is integrally formed, when rotating at high speed, it is easy to cause the shaft hole 31 of the eccentric block 3 to deform or the eccentric block 3 to be damaged due to thermal expansion and contraction. The slit 32 can absorb the thermal expansion and contraction, thereby increasing the service life of the eccentric block 3.

[0047] In another technical solution, a plurality of pairs of bearings 11 are provided on the side wall of the housing 1, and both ends of a shaft body 2 are sealed and fixed on a pair of bearings 11, and a bearing end cover 12 is provided on one side of the bearing 11 located outside the housing 1. The rotation resistance of the bearing 11 is small, which is conducive to high-speed rotation of the shaft body 2 and helps to reduce heat generation. The bearing end cover 12 can increase the sealing area and improve the sealing performance of the bearing 11.

[0048] In another technical solution, the synchronous drive assembly 4 includes:

[0049] A pair of pulleys 41 are coaxially sleeved and fixed on a pair of shafts 2 located at the center and located on the same side of the outside of the shell 1. A V-belt is sleeved on the pair of pulleys 41. The connection between the V-belt and the pulley 41 adopts a universal connection method, so the V-belt is not shown in the figure.

[0050] The motor has an output shaft coaxially fixed with the shaft body 2 where one of the pulleys 41 is located; the connection between the motor output shaft and the shaft body 2 adopts a universal connection method, so the motor is not shown in the figure.

[0051] A plurality of gears 42 are provided, one gear 42 is coaxially sleeved and fixed on one shaft 2 and is located in the housing 1 , and the gears 42 on two adjacent shafts 2 are in a gear meshing state.

[0052] In the above technical solution, starting the motor can drive the corresponding shaft body 2 to rotate, and then drive the corresponding pulley 41 to rotate, and then based on the V-belt, drive another shaft body 2 to rotate synchronously. At the same time, there is a synchronous restriction of the meshing of the gear 42 between the two shaft bodies 2, so that the synchronous rotation between the shaft bodies 2 is more reliable, so that multiple shaft bodies 2 can form a whole to generate synchronous exciting force.

[0053] In another technical solution, a radially arranged limit key 23 is convexly provided at the end of the shaft body 2 on which the pulley 41 is provided;

[0054] The inner wall of the pulley 41 is recessed along the axial direction to form a limiting groove 43 , and the limiting key 23 is clamped in the limiting groove 43 .

[0055] In the above technical solution, by providing the limit groove 43 and the limit key 23, the radial rotation of the pulley 41 relative to the shaft body 2 can be avoided, making the synchronous rotation more reliable.

[0056] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Cement block forming machine excitation force adjustable eccentric block type vibration box, characterized in that: include: case; A plurality of pairs of shaft bodies, the plurality of pairs of shaft bodies are arranged in parallel, and both ends of the shaft bodies are sealed and rotatably arranged on the shell, and both ends pass through the outside of the shell; A plurality of pairs of eccentric blocks, wherein a pair of eccentric blocks is detachably fixed to a portion of a shaft body located outside the housing; A synchronous drive assembly drives the shaft to rotate synchronously.

2. The eccentric block type vibration box with adjustable exciting force for cement block forming machine as claimed in claim 1, characterized in that: The eccentric block is fan-shaped, and is provided with an axial hole, which is a spline hole; One section of the shaft body located outside the shell is set as a spline shaft, an annular abutment seat is convexly provided on the end of the spline shaft close to the shell, a thread is set on the end away from the shell, and a clamping cover is screwed, the shaft hole is adapted to be set on the spline shaft, and the two side surfaces of the eccentric block are respectively abutted against the abutment seat and the clamping cover.

3. The eccentric block type vibration box with adjustable exciting force for cement block forming machine as claimed in claim 2, characterized in that: The eccentric block is provided with a slit along its radial direction connecting the shaft hole to the edge, and the eccentric block is provided with at least one locking threaded countersunk hole passing through the slit along a surface perpendicular to the slit, and a locking bolt is screwed on the threaded countersunk hole.

4. The eccentric block type vibration box with adjustable exciting force for cement block forming machine as claimed in claim 1, characterized in that: A plurality of pairs of bearings are provided on the side wall of the shell, and both ends of an axle body are sealed and fixed on a pair of bearings. A bearing end cover is sleeved on one side of the bearing located outside the shell.

5. The eccentric block type vibration box with adjustable exciting force for cement block forming machine as claimed in claim 1, characterized in that: The synchronous drive assembly comprises: A pair of pulleys, the pair of pulleys are coaxially sleeved and fixed on a pair of shafts located at the center and are located on the same side of the exterior of the housing, and the pair of pulleys are sleeved with a V-belt; The motor has an output shaft coaxially fixed to the shaft body where one of the pulleys is located; A plurality of gears, one gear is coaxially sleeved and fixed on a shaft body and is located in the housing, and the gears on two adjacent shaft bodies are in a gear meshing state.

6. The eccentric block type vibration box with adjustable exciting force for cement block forming machine as claimed in claim 5, characterized in that: The end of the shaft body on which the pulley is provided is convexly provided with a limit key arranged in the radial direction; The inner side wall of the pulley is provided with a limit groove along the axial depression, and the limit key is clamped in the limit groove.

Images