Pattern wheel sheet grinding body and wear resistance testing machine

Abstract

According to the floral wheel piece grinding body for the wear resistance test and the wear resistance testing machine comprising the floral wheel piece grinding body, the circumferential rotation of the floral wheel piece shaft is limited by the coupling of the limiting handle and the blind hole groove, and the axial movement of the floral wheel piece shaft is limited by the threaded coupling of the threaded section and the threaded hole of the butt joint hole seat; therefore, the floral wheel sheet shaft can be easily fixed. The threaded section of the floral wheel sheet shaft does not need to be too tightly coupled with the threaded hole of the butt-joint hole seat; during disassembly and assembly, the torque limiting piece can be manually operated and rotated by pulling out the limiting handle, so that the threaded section of the floral wheel sheet shaft is screwed out of the threaded hole of the butt joint hole seat. Therefore, according to the floral wheel sheet grinding body structure provided by the utility model, the replacement of the floral wheel sheet becomes very convenient.

Description

Technical Field

[0001] This utility model relates to the field of engineering testing, and in particular to a wear-resistant grinding wheel for wear resistance testing of materials such as cement mortar, concrete, and stone, and a wear-resistant testing machine containing the wear-resistant grinding wheel. Background Technology

[0002] Abrasion resistance testing machines are used to test the abrasion resistance of building materials such as cement mortar, concrete, and stone. The grinding media (also called the grinding head) of the abrasion resistance testing machine is equipped with patterned wheels. There are three sets of patterned wheels, with two wheels in each set. These patterned wheels are consumable parts and require frequent replacement. Most abrasion resistance testing machines on the market use a patterned wheel fixing method similar to that described in CN2053752U. Figure 2 As shown, the pattern wheel is fitted onto a pin, the inner end of which is inserted into a blind hole in the grinding body seat, and the outer end of which is inserted into a hole in the support. The support is fixed to the outer circumferential surface of the grinding body by at least two screws, thus securing the pattern wheel. Replacement requires removing the screws, removing the support, and then replacing the pattern wheel. To achieve this tightness, the screws require a significant torque to tighten, making disassembly and installation inconvenient, and frequent disassembly and installation may cause the screw threads to strip.

[0003] To address this, CN210269486U proposes a quick-release structure. The circular shaft on which the flower wheel is arranged is provided with a first stop and a second stop at both ends. The seat surface and the baffle are provided with grooves that couple with the first stop and the second stop. The rotation of the circular shaft is restricted by the first stop and the second stop being embedded in the two grooves. Then, the longitudinal movement of the shaft is restricted by the clamping plate to prevent the first stop and the second stop from coming out of the grooves. However, as shown in Figure 5, the arrangement of the first and second stops makes it difficult to install or remove the flower wheel from the round shaft. At least one of the first and second stops needs to be installed before it can be fixed on the round shaft. Since the grooves of the seat and the baffle in the device are fixed, the first and second stops must be able to fit into the corresponding grooves simultaneously. If either stop does not correspond to the groove, it will prevent the entire assembly from fitting in. This requires the relative angles of the first and second stops to be very precise. It is very difficult for companies using this device to achieve such alignment themselves, which contradicts the easy disassembly claimed in the patent. Therefore, it is necessary for the round shaft, flower wheel, first and second stops, etc., to be manufactured, assembled, and sold as a whole, increasing the user's cost. In addition, even if the seller manufactures this integrated flower wheel assembly themselves, the cost is still high.

[0004] Therefore, operators of abrasion resistance tests urgently need a truly convenient abrasive grinding body structure for disassembling and assembling the abrasive grinding body, as well as an abrasion resistance testing machine incorporating such abrasive grinding body. The entire contents disclosed in CN2053752U and CN210269486U are specifically incorporated herein by reference. Summary of the Invention

[0005] Based on the aforementioned technical problems in the existing technology, this utility model proposes a pattern wheel grinding body structure that facilitates the assembly and disassembly of pattern wheel discs, as well as a wear resistance testing machine containing the pattern wheel grinding body.

[0006] The present invention relates to a grinding wheel bearing, comprising a base, a support, a grinding wheel bearing shaft, and a torque limiting component. The base includes an upper base and a lower base extending downward from the center of the upper base. The equivalent diameter of the lower base is smaller than that of the upper base, meaning that the upper and lower bases together resemble a "T" shape when viewed from the front. The lower base has multiple mating holes evenly distributed circumferentially on its outer periphery, for example, n mating holes, where n is an integer greater than or equal to 2. The mating holes have threaded holes. Based on the common practice in existing equipment where three mating holes are used to provide three sets of grinding wheels, each set containing two grinding wheels, this invention is not limited to providing three sets of grinding wheels due to certain practical considerations or the possibility of subsequent specification revisions. The number of supports is equal to the number of mating hole seats, and the supports and mating hole seats are arranged opposite each other with their upper ends fixed to the upper body. The side of the support opposite to the mating hole seat has a sliding groove extending upward from the bottom end of the support, and the side of the support opposite to the mating hole seat has a blind hole groove. A through hole is provided between the sliding groove and the blind hole groove, and the through hole is coaxially arranged with the threaded hole of the mating hole seat. The pattern wheel axle is placed between the lower body and the support. The pattern wheel axle has a smooth rod section on the support side and a threaded section on the lower body side. The threaded section can be threadedly coupled with the threaded hole of the mating hole seat. A pattern wheel is fitted on the outer surface of the smooth rod section. The pattern wheel axle also has a torque hole coaxially extending from the end side of the smooth rod section towards the threaded section. The torque limiting component includes a limiting handle and a torque rod that are fixedly connected to each other. The torque rod can pass through the through hole and can rotate freely relative to the support. The torque rod can further slide axially in the torque hole of the flower wheel shaft, but the torque rod and the flower wheel shaft cannot rotate circumferentially relative to each other. When the torque rod is inserted into the torque hole, it can drive the limiting handle to be embedded in the blind hole groove. After the limiting handle is embedded in the blind hole groove, it cannot rotate relative to each other.

[0007] Furthermore, this utility model also provides a wear resistance testing machine comprising the above-mentioned flower wheel grinding body.

[0008] The present invention proposes a pattern wheel grinding body structure. When installing a new pattern wheel, the pattern wheel shaft with the pattern wheel attached is introduced into the space between the threaded hole of the mating seat and the through hole of the support via a sliding groove. The torque rod of the torque limiting member passes through the through hole and is inserted into the torque hole of the pattern wheel shaft. Rotating the limiting handle screws the threaded section of the pattern wheel shaft into the threaded hole of the mating seat a certain distance. Then, the torque rod is further inserted into the torque hole, and during the insertion process, the torque rod is rotated appropriately to align the limiting handle with the blind hole groove, thus embedding the limiting handle into the blind hole groove. Therefore, the coupling between the limiting handle and the blind hole groove restricts the circumferential rotation of the pattern wheel shaft, and the threaded coupling between the threaded section and the threaded hole of the mating seat restricts the axial movement of the pattern wheel shaft, thereby easily fixing the pattern wheel shaft. Furthermore, it does not require excessively tight coupling between the threaded section of the pattern wheel shaft and the threaded hole of the mating seat. During disassembly and assembly, the limiting handle can be pulled out, and the torque limiting member can be rotated manually to unscrew the threaded section of the pattern wheel shaft out of the threaded hole of the mating seat. Therefore, the grinding body structure of the flower wheel provided by this utility model makes the replacement of the flower wheel very convenient. Attached Figure Description

[0009] Figure 1 This is a bottom view schematic diagram of the structure of this utility model.

[0010] Figure 2 Schematic diagram of the support structure

[0011] Figure 3 sectional view of the flower wheel axle when it is fixed. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to embodiments:

[0013] This utility model provides a concrete abrasion resistance testing machine, including a grinding wheel, and naturally includes a drive device (such as a motor), a counterweight, a test block fixing seat, and other known or existing structures. Some embodiments may also include a dust removal device to reduce the dust generated during the abrasion resistance test.

[0014] The structure of the flower wheel grinding body of this utility model is shown in [reference]. Figure 1-3 ,include:

[0015] -The base 1 includes an upper base 11 and a lower base 12 extending downward from the center of the upper base 11. The equivalent diameter of the lower base 12 is smaller than the equivalent diameter of the upper base 11. The outer circumferential surface of the lower base 12 is evenly distributed with n mating hole seats 13, where n is an integer greater than or equal to 2. In this specific embodiment, there are 3 mating hole seats 13, and the mating hole seats 13 have threaded holes.

[0016] - Support 2, support 2 corresponds to and is arranged opposite to docking hole seat 13, and the upper end of support 2 can be fixed to upper seat body 11 by welding or by detachable fixed connection. The side of support 2 opposite to docking hole seat 13 is provided with a sliding groove 23 extending upward from the bottom end. The side of support 2 opposite to docking hole seat 13 is provided with a blind hole groove 21. A through hole 22 is provided between sliding groove 23 and blind hole groove 21. The through hole 22 is coaxially arranged with the threaded hole of docking hole seat 13.

[0017] - The flower wheel shaft 3 is placed between the lower seat 12 and the support 2. The flower wheel shaft 3 has a smooth rod section 31 on the side of the support 2 and a threaded section 32 on the side of the lower seat 12. The threaded section 32 can be threadedly coupled to the threaded hole of the mating hole seat 13. The outer surface of the smooth rod section 31 is fitted with a flower wheel (not shown in the figure, see the existing structure). The flower wheel shaft 3 also has a torque hole 33 that extends axially from the end side of the smooth rod section 31 to the threaded section 32.

[0018] - The torque limiting component 4 includes a limiting handle 41 and a torque rod 42 fixedly connected to each other. The torque rod 42 can pass through the through hole 22 and can rotate freely relative to the support 2. The torque rod 42 can further slide axially in the torque hole 33 of the flower wheel shaft 3, but the torque rod 42 and the flower wheel shaft 3 cannot rotate relative to each other in the circumferential direction. It can be understood that the hole shape of the torque hole 33 is coupled with the outer surface shape of the torque rod 42 and the longitudinal section is not circular. A common form is the coupling structure of an internal hexagonal wrench and an internal hexagonal hole, that is, the longitudinal section of the torque hole 33 is a regular hexagon and the torque rod 42 is a regular hexagonal prism structure. However, this utility model is obviously not limited to this. The torque rod 42 inserted into the torque hole 33 can drive the limiting handle 41 to be embedded in the blind hole groove 21. After the limiting handle 41 is embedded in the blind hole groove 21, it cannot rotate relative to the limit.

[0019] Generally, the friction between the torque limiting member 4, the torque hole 33, and the blind hole groove 21 is sufficient to prevent the limiting handle 41 from naturally disengaging from the blind hole groove 21. However, to further provide reliability and avoid possible spontaneous disengagement due to vibration, another embodiment may provide a locking structure. When locked, the locking structure prevents the limiting handle 41 from disengaging from the blind hole groove 21 after it has become embedded in it. When unlocked, the limiting handle 41 can disengage from the blind hole groove 21. Specifically, see [link to documentation]. Figure 3The locking structure is a baffle 5, which is rotatably disposed on the outer surface of each support 2. The baffle 5 can be rotated to cover only a portion of the outer surface of the support 2 (unlocking) or to cover at least a portion of the outer surface of the support 2 and at least a portion of the outer surface of the limiting handle 41 (locking); or the locking structure is an elastic ring band, which simultaneously surrounds the outer surface of n supports 2. When the elastic ring band acts on at least a portion of the outer surface of the limiting handle 41, it can achieve locking; or the locking structure is a magnetic block, similar to the baffle 5. The magnetic block can be magnetically attracted to the support 2 to cover only a portion of the outer surface of the support 2 (unlocking) or to cover at least a portion of the outer surface of the support 2 and at least a portion of the outer surface of the limiting handle 41 (locking).

[0020] In another embodiment, a torque rod bearing (not shown) is also included. Similar to common bearings, the torque rod bearing has an outer ring, an inner ring, and balls between the inner and outer rings. The outer ring of the torque rod bearing is fixed in the through hole (22), and the hollow cavity of the inner ring has a shape complementary to the torque rod (42), so that the torque rod (42) can move axially along the hollow cavity of the inner ring, but the torque rod (42) cannot rotate relative to the inner ring. For example, if the torque rod (42) is a hexagonal prism structure, then the hollow cavity of the inner ring is also a hexagonal structure. In this case, the torque rod bearing has a bearing structure similar to that described in CN2937621Y and CN111059153A. For another example, if the cross-section of the torque rod (42) is rectangular, then the torque rod bearing has a bearing structure similar to that described in CN202628833U. The torque rod bearing facilitates the free rotation and axial sliding of the torque rod (42) and restricts the wobble of the torque rod off the axis.

[0021] In another embodiment, the limiting handle 41 is provided with a pull-out operation handle (not shown in the figure) to facilitate the pull-out of the torque limiting member 4 to operate the disassembly and assembly of the flower wheel shaft 3.

[0022] In another embodiment, the groove 23 has a top wall, which the flower wheel shaft 3 abuts against (see...). Figure 3 When the top wall is reached, the flower wheel shaft 3 and the threaded hole of the mating hole seat 13 are coaxial. As mentioned above, since the through hole 22 and the threaded hole of the mating hole seat 13 are coaxial, it is very convenient to align and insert the torque rod 42 and the torque hole 33.

[0023] Preferably, the top wall is an arched dome (see...) Figure 2 The radius of the arc-shaped dome is equal to the radius of the flower wheel shaft (3), which will further improve the ease of alignment and insertion of the torque rod 42 and the torque hole 33.

[0024] More preferably, such as Figure 3As shown, after at least a portion of the threaded section 32 of the flower wheel shaft 3 is coupled to the threaded hole of the mating hole seat 13, at least a portion of the smooth section 31 of the flower wheel shaft 3 can still abut against the top wall of the groove 23, that is, at least a portion of the smooth section 31 is still within the area of ​​the groove 23. It can be understood that during the wear resistance test, the flower wheel shaft 3 is subjected to an upward reaction force from the test block (transmitted through the flower wheel). If the outer wall side of the flower wheel shaft 3 is suspended, a force will be generated between the flower wheel shaft 3 and the torque rod 42 to counteract the above reaction force. The torque rod 42 may therefore deform, which is not conducive to subsequent insertion and extraction. Through the above-mentioned abutting arrangement (instead of suspending the flower wheel shaft 3), the above-mentioned reaction force on the flower wheel shaft can be counteracted by the support 2 (top wall of the groove 23) abutting against the flower wheel shaft 3.

[0025] The disassembly and assembly process of the flower wheel grinding body of this utility model is as follows: Figure 1 The diagrams A, B, and C are shown below. Specifically:

[0026] During assembly, the process includes: Step A: guiding the flower wheel shaft 3 (on which flower wheel pieces are already arranged) along the slide groove 23 to a position coaxial with the threaded hole of the mating hole seat 13; Step B: inserting the torque rod 42 of the torque limiting member 4 through the through hole 22 and partially into the torque hole 33 of the flower wheel shaft 3; Step C: operating the limiting handle 41 to rotate the torque rod 42 to at least partially screw the threaded section 32 of the flower wheel shaft 3 into the threaded hole of the mating hole seat 13, and then continuing to insert the torque rod 42 into the torque hole 33 while appropriately rotating the torque limiting member 4 during insertion to align the limiting handle 41 with the blind hole groove 21 until the limiting handle 41 is embedded in the blind hole groove 21; optionally, a locking structure can be further arranged to lock the limiting handle 41. It is understandable that the disassembly operation can be performed by reversing the steps.

[0027] It should be noted that the replacement of the flower wheel blades described in this utility model can be either replacing only the flower wheel blades on the flower wheel blade shaft (i.e., after removal, the flower wheel blades and the flower wheel blade shaft still need to be separated), or replacing the entire flower wheel blade shaft with the flower wheel blades attached. The upper and lower positional relationship of this utility model can be referenced. Figure 3 From this perspective, one can also refer to CN2053752U. Figure 2 From the perspective of CN210269486U Figure 3 From that perspective.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flower wheel grinding media, characterized in that... include: - A seat (1), including an upper seat (11) and a lower seat (12) extending downward from the center of the upper seat (11). The equivalent diameter of the lower seat (12) is smaller than that of the upper seat (11). The lower seat (12) has n mating hole seats (13) evenly distributed around its outer circumference. The mating hole seats (13) have threaded holes, and n is an integer greater than or equal to 2. - Support (2), the number of supports (2) is n, the supports (2) are arranged opposite to the docking hole seat (13) and the upper end is fixed to the upper seat body (11). The side of the support (2) opposite to the docking hole seat (13) is provided with a sliding groove (23) extending upward from the bottom end. The side of the support (2) opposite to the docking hole seat (13) is provided with a blind hole groove (21). A through hole (22) is provided between the sliding groove (23) and the blind hole groove (21). The through hole (22) and the threaded hole of the docking hole seat (13) are arranged on the same axis. - A flower wheel shaft (3) is placed between the lower seat (12) and the support (2). The flower wheel shaft (3) has a smooth rod section (31) on the side of the support (2) and a threaded section (32) on the side of the lower seat (12). The threaded section (32) can be threadedly coupled to the threaded hole of the mating hole seat (13). A flower wheel is sleeved on the outer surface of the smooth rod section (31). The flower wheel shaft (3) also has a torque hole (33) that extends axially from the end side of the smooth rod section (31) to the threaded section (32). - Torque limiting component (4), including a limiting handle (41) and a torque rod (42) fixedly connected to each other. The torque rod (42) can pass through the through hole (22) and can rotate freely relative to the support (2). The torque rod (42) can further slide axially in the torque hole (33) of the flower wheel shaft (3), but the torque rod (42) and the flower wheel shaft (3) cannot rotate relative to each other in the circumferential direction. When the torque rod (42) is inserted into the torque hole (33), it can drive the limiting handle (41) to be embedded in the blind hole groove (21). After the limiting handle (41) is embedded in the blind hole groove (21), it cannot rotate relative to each other.

2. The flower wheel grinding media according to claim 1, characterized in that: It also includes a locking structure, which is used to prevent the limit handle (41) from being inserted into the blind hole groove (21) and then disengaging from the blind hole groove (21) when the locking structure is locked. When the locking structure is unlocked, the limit handle (41) can be disengaged from the blind hole groove (21).

3. The flower wheel grinding media according to claim 2, characterized in that: The locking structure is a baffle (5), which is rotatably disposed on the outer surface of each support (2); or the locking structure is an elastic ring band, which simultaneously surrounds the outer surface of n supports (2). Alternatively, the locking structure may be a magnet block.

4. The faceplate abrasive body of claim 1, wherein: It also includes a torque rod bearing, which has an outer ring, an inner ring and balls between the inner and outer rings. The outer ring is fixed in the through hole (22), and the hollow cavity of the inner ring has a shape complementary to the torque rod (42), so that the torque rod (42) can move axially along the hollow cavity of the inner ring but the torque rod (42) cannot rotate relative to the inner ring.

5. The flower wheel grinding media according to claim 1, characterized in that: The limit handle (41) has a pull-out operation handle.

6. The flower wheel grinding media according to claim 1, characterized in that: The groove (23) has a top wall. When the flower wheel shaft (3) abuts against the top wall, the flower wheel shaft (3) is coaxial with the threaded hole of the mating hole seat (13).

7. The flower wheel grinding media according to claim 6, characterized in that: The top wall is an arc-shaped dome, and the radius of the arc-shaped dome is equal to the radius of the flower wheel axle (3).

8. The flower wheel grinding media according to claim 6 or 7, characterized in that: When at least a portion of the threaded section (32) of the flower wheel shaft (3) is coupled to the threaded hole of the mating hole seat (13), at least a portion of the smooth section (31) of the flower wheel shaft (3) can still abut against the top wall of the groove (23).

9. The faceplate abrasive body of claim 1, wherein: The longitudinal section of the torque hole (33) is a regular hexagon, and the torque rod (42) is in the form of a regular hexagonal prism.

10. A wear tester characterized by: It includes the flower wheel grinding media as described in any one of claims 1-9.

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