A surface treatment device for a composite brake drum

Abstract

The application relates to the technical field of automobile part processing, in particular to a surface treatment device for a composite brake drum. The surface treatment device for the composite brake drum comprises a machine base, a first clamping part, a second clamping part, a rotating shaft, a polishing disc and an adjusting assembly. The first clamping part is arranged on the machine base and is used for clamping the composite brake drum in the circumferential direction. The first clamping part can rotate around a first axis. The second clamping part is movably arranged on the machine base and can move relative to the first clamping part in the direction of approaching or moving away from each other and is used for clamping the composite brake drum in the circumferential direction. The rotating shaft is inserted into the second clamping part and can rotate around its own axis. The rotating shaft can be switched between the active connection and the fixed connection with the second clamping part. The polishing disc can rotate around its own axis and is used for polishing the composite brake drum. The adjusting assembly is used for adjusting the position of the rotating shaft so that the axis of the rotating shaft coincides with the first axis, thereby improving the polishing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile part processing, in particular to a surface treatment device for a composite brake drum. BACKGROUND

[0002] In recent years, with the development of the automobile industry, traditional all-cast iron brake drums have been gradually replaced by composite brake drums due to their easy cracking and short service life. A composite brake drum is an automobile brake component that combines different materials to improve its performance. Its main advantage is that it combines the properties of multiple materials, such as high strength, high toughness, wear resistance, and thermal fatigue resistance.

[0003] During the production of a composite brake drum, in order to ensure the surface quality of the composite brake drum, the inner and outer circumferential walls of the composite brake drum need to be polished. A polishing device is needed during polishing. In related technologies, such as Chinese patent CN217750696U, a polishing device for an automobile brake drum is disclosed. The automobile brake drum polishing device places the brake drum body on the top of the support base, places the inner polishing rod inside the brake drum body, and places the outer polishing rod on the outer wall of the brake drum body. The servo motor drives the rotating shaft to rotate, which drives the four transmission rods to rotate. The scraper rod is attached to the brake drum body and rotates to polish the outer and inner walls of the brake drum body, thereby achieving the effect of single double-sided polishing to improve polishing efficiency.

[0004] The existing polishing device needs to use a clamping assembly to clamp and fix the outer circumferential wall of the composite brake drum when polishing the outer circumferential wall of the composite brake drum, which prevents the clamped part of the composite brake drum from being polished. To ensure polishing efficiency, another clamping assembly is often provided on the opposite side of the composite brake drum, and the clamping assembly clamps and fixes the outer circumferential wall of the composite brake drum that has already been polished, thereby completing the complete polishing of the outer circumferential wall of the composite brake drum. However, during this process, due to machining errors and clamping errors of the clamping assembly, the centers of the two clamping operations cannot be precisely coaxial. Once this coaxiality deviation occurs, it will not only affect the stability of clamping, causing the composite brake drum to slightly shake during polishing, but also affect the polishing effect, causing the composite brake drum to be unevenly polished. SUMMARY

[0005] Therefore, it is necessary to provide a surface treatment device for a composite brake drum to solve the problem of poor polishing effect during the polishing process of the outer circumferential wall of the composite brake drum.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] A surface treatment device for a composite brake drum, comprising:

[0008] a base;

[0009] a first clamping part arranged on the base and configured to clamp a peripheral wall of the composite brake drum in a circumferential direction; the first clamping part has a first axis and is rotatable about the first axis;

[0010] a second clamping part movably arranged on the base and movable relative to the first clamping part in a direction of approaching or moving away from each other, and configured to clamp the peripheral wall of the composite brake drum in a circumferential direction;

[0011] a rotating shaft inserted on the second clamping part and rotatable about an axis thereof; the rotating shaft has a first state and a second state; in the first state, the rotating shaft and the base and the second clamping part are movably connected; in the second state, the rotating shaft and the second clamping part are fixedly connected and rotatable about the axis thereof relative to the base;

[0012] a polishing disc arranged on the base and rotatable about an axis thereof and slidable relative to the first clamping part in a direction extending along the first axis, so as to polish the peripheral wall of the composite brake drum;

[0013] an adjusting assembly configured to adjust a position of the rotating shaft, so that the axis of the rotating shaft coincides with the first axis.

[0014] Further, the adjusting assembly comprises a rotating disc and a damping part; the rotating disc is arranged on the base; when the rotating shaft is in the first state, the rotating disc is rotatable about an axis thereof; when the rotating shaft is in the second state, the rotating disc is fixedly connected with the base; a sliding hole is formed in a disc surface of the rotating disc, and a trace shape of the sliding hole is a spiral line shape; the rotating shaft is inserted in the sliding hole and movable along the sliding hole; the damping part is configured to hinder the movement of the rotating shaft.

[0015] Further, the damping part comprises an elastic member; the elastic member is inserted in the sliding hole and connected between the rotating shaft and the rotating disc.

[0016] Further, the elastic member is arranged as a compression spring.

[0017] Further, the surface treatment device for the composite brake drum further comprises a plurality of rolling balls; the rolling balls are each inserted on the base and freely movable, so that a rolling fit is formed between the rotating disc and the base.

[0018] Furthermore, the rotating shaft and the base and the second clamping portion are all connected by closable magnetic connections to switch the state of the rotating shaft.

[0019] Furthermore, the surface treatment device for a composite brake drum further includes a driving assembly configured to provide a driving force for rotating the rotating shaft.

[0020] Furthermore, the driving assembly includes a first driving motor and a connecting member, wherein the first driving motor is arranged on the machine base; and the connecting member is connected between the first driving motor and the rotating shaft.

[0021] Furthermore, the connecting member is configured as an Oldham coupling.

[0022] Furthermore, the first clamping part and / or the second clamping part is configured as a three-jaw chuck.

[0023] The beneficial effects of the present invention are:

[0024] The cam is adapted to move relative to the first clamping portion and to move the second clamping portion in a direction close to the first clamping portion so as to clamp the outer peripheral wall of the composite brake drum in the circumferential direction. The shaft is positioned so that the axis of the rotating shaft coincides with the first axis, thereby eliminating the problem of misalignment of the clamping centers caused by the two clamping processes, so that the composite brake drum can be firmly clamped throughout the entire grinding process; the rotating shaft is then switched to the second state so that the rotating shaft and the second clamping part are fixedly connected, and then the first clamping part stops rotating about the first axis and releases its clamping of the outer peripheral wall of the composite brake drum, and then the first clamping part is driven to move away from the second clamping part, and then the rotating shaft is driven to rotate about its own axis. The rotating shaft drives the composite brake drum to rotate through the second clamping part, and then drives the grinding disc to rotate about its own axis while driving the grinding disc to slide relative to the first clamping part in the direction extending from the first axis to grind another portion of the outer peripheral wall of the composite brake drum; by setting the clamping centers to be coaxial during the two grinding processes, while ensuring more uniform and stable contact between the grinding disc and the outer peripheral wall of the composite brake drum, the grinding effect is effectively improved, and the quality of the surface treatment of the composite brake drum is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of the surface treatment device for a composite brake drum provided by an embodiment of the present invention when polishing the composite brake drum;

[0026] Figure 2 A schematic diagram of the exploded parts of the surface treatment device for a composite brake drum provided by an embodiment of the present invention when polishing the composite brake drum;

[0027] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 4 A schematic side view of the surface treatment device for a composite brake drum provided by an embodiment of the present invention during polishing of the composite brake drum;

[0029] Figure 5 For Figure 4 B-B is a cross-sectional view of the middle;

[0030] Figure 6 For Figure 5 C is a local enlarged structural schematic view at the middle.

[0031] Wherein:

[0032] 1, base; 101, bottom cylinder; 102, sliding rod; 103, second drive motor; 104, support rod; 105, drive cylinder; 106, third drive motor; 107, support ring; 108, cylindrical cavity;

[0033] 2, first clamping part;

[0034] 3, second clamping part;

[0035] 4, rotating shaft; 401, mounting ring;

[0036] 5, polishing disc;

[0037] 6, adjusting assembly; 601, rotating disc; 6011, sliding hole; 602, damping part; 6021, compression spring; 6022, stop block;

[0038] 7, ball;

[0039] 8, drive assembly; 801, first drive motor; 802, cross slider coupling; 8021, lower disc; 8022, intermediate disc; 8023, upper disc;

[0040] 9, composite brake drum. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below by examples and in conjunction with the drawings. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0042] The serial numbers of components in the present application, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. In the description of the present application, it should be understood that the terms "connected", "coupled" include direct and indirect connections (couplings) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0044] As shown in the Figures 1 to 6 The surface treatment device for composite brake drum provided by the embodiment of the present application is used for polishing the outer peripheral wall of the composite brake drum 9, and is provided with a machine base 1, a first clamping part 2, a second clamping part 3, a rotating shaft 4, a polishing disc 5 and an adjusting assembly 6. The first clamping part 2 is arranged on the machine base 1 and is configured to be able to clamp the outer peripheral wall of the composite brake drum 9 in a circumferential direction; the first clamping part 2 has a first axis and is able to rotate about the first axis; the second clamping part 3 is movably arranged on the machine base 1 and is able to move relative to the first clamping part 2 in a direction of approaching or moving away from each other, and is configured to be able to clamp the outer peripheral wall of the composite brake drum 9 in a circumferential direction; the rotating shaft 4 is inserted and arranged on the second clamping part 3 and is able to rotate about its own axis; the rotating shaft 4 has a first state and a second state, in the first state, the rotating shaft 4 and the machine base 1, the second clamping part 3 are movably connected; in the second state, the rotating shaft 4 and the second clamping part 3 are fixedly connected, and are only able to rotate about its own axis relative to the machine base 1; the polishing disc 5 is arranged on the machine base 1 and is able to rotate about its own axis, and is able to slide relative to the first clamping part 2 in a direction extending along the first axis, so as to be able to polish the outer peripheral wall of the composite brake drum 9; the adjusting assembly 6 is configured to be able to adjust the position of the rotating shaft 4, so that the axis of the rotating shaft 4 coincides with the first axis.

[0045] Specifically, in the present embodiment, as Figure 1As shown, the base 1 is configured as a flat plate structure, and the plate surface is configured horizontally when in use; the first clamping portion 2 and the second clamping portion 3 are arranged at intervals in the vertical direction, and the first clamping portion 2 is located above the second clamping portion 3; in order to facilitate the installation of the first clamping portion 2 and enable the first clamping portion 2 and the second clamping portion 3 to move relative to each other in the direction of moving away from or approaching each other, two bottom cylinders 101 are vertically configured on the top of the base 1, and the bottom cylinder 101 is configured as a square cylinder structure. The two bottom cylinders 101 are arranged at intervals along the width direction of the base 1, and a sliding rod 102 is inserted into the top of the two bottom cylinders 101 together, and the sliding rod 102 is configured as a square rod structure. , and consists of a top branch rod and two side branch rods. The top branch rod is horizontally arranged and extends along the width direction of the machine base 1. The two side branch rods are respectively vertically arranged at the bottom of both ends of the top branch rod and are respectively slidably inserted in the two bottom cylinders 101 to synchronously drive the first clamping part 2 to move relative to the second clamping part 3 in the direction of approaching or moving away from each other; a second drive motor 103 is provided in the middle of the top of the top branch rod, and the motor shaft of the second drive motor 103 is arranged downward in the vertical direction and is fixedly inserted at the top of the first clamping part 2, and the first axis and the axis of the second drive motor 103 coincide, so as to drive the first clamping part 2 to rotate around the first axis.

[0046] It can be understood that the driving force for the sliding of the sliding rod 102 can be provided by air pressure, hydraulic pressure or electric pressure, wherein when the driving force for the sliding of the sliding rod 102 is provided by air pressure, the bottom cylinder 101 and the sliding rod 102 together form a pneumatic cylinder-like structure; when the driving force for the sliding of the sliding rod 102 is provided by hydraulic pressure, the bottom cylinder 101 and the sliding rod 102 together form a hydraulic cylinder-like structure; when the driving force for the sliding of the sliding rod 102 is provided by electric pressure, the bottom cylinder 101 and the sliding rod 102 together form an electric cylinder-like structure.

[0047] like Figure 5 As shown, in order to facilitate the placement of the rotating shaft 4, a support ring 107 is provided on the top of the machine base 1, the annular surface of the support ring 107 is arranged horizontally, and the support ring 107 is composed of a first sub-ring, a second sub-ring, a third sub-ring and a fourth sub-ring arranged in sequence from top to bottom, and the inner diameter of the first sub-ring is larger than the inner diameter of the second sub-ring, the inner diameter of the second sub-ring is larger than the inner diameter of the third sub-ring, the inner circumferential wall of the fourth sub-ring is a conical annular surface, and the small end is arranged on the top, and the minimum inner diameter of the fourth sub-ring is larger than the inner diameter of the first sub-ring; a cylindrical cavity 108 is opened in the machine base 1, the axis of the cylindrical cavity 108 is arranged vertically, and coincides with the axis of the support ring 107, and is connected to the support ring 107; the axis of the rotating shaft 4 is arranged vertically during installation, and coincides with the axis of the support ring 107, the bottom end of the rotating shaft 4 is suspended and inserted in the cylindrical cavity 108, the top end passes through the support ring 107, and is inserted at the bottom of the second clamping part 3; as shown Figure 6As shown, a bearing is rotatably sleeved on the rotating shaft 4, and a mounting ring 401 is sleeved outside the bearing. The mounting ring 401 abuts against the top of the third sub-ring, and a spline is coaxially arranged on the top of the rotating shaft 4. A mounting groove is opened at the bottom of the second clamping part 3, and the mounting groove is set as a T-shaped columnar structure. When the rotating shaft 4 is installed, the spline is movably inserted into the mounting groove; the second clamping part 3 is located above the support ring 107.

[0048] like Figure 1 As shown, the grinding disc 5 is arranged horizontally when in use; in order to facilitate the installation of the grinding disc 5 and enable the grinding disc 5 to slide relative to the first clamping part 2 in the direction of extension of the first axis, a support rod 104 is provided at the top of the machine base 1, and the support rod 104 is arranged into a C-shaped structure with the notch facing the machine base 1, and a driving cylinder 105 is provided at the middle part of the top of the support rod 104, and the output shaft of the driving cylinder 105 is arranged downward in the vertical direction and is coaxially inserted in the grinding disc 5 and can rotate relative to the grinding disc 5, and a third driving motor 106 is also provided at the top of the machine base 1, and the third driving motor 106 is located below the support rod 104, and the motor shaft of the third driving motor 106 is arranged upward in the vertical direction and is coaxially inserted in the grinding disc 5, and forms a spline fit with the grinding disc 5, so that the grinding disc 5 can slide in the vertical direction relative to the third driving motor 106 and can rotate relative to the driving cylinder 105.

[0049] It is understandable that the driving cylinder 105 can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0050] Initially, the rotating shaft 4 is in the first state, and the rotating shaft 4, the machine base 1, and the second clamping portion 3 are all movably connected.

[0051] During use, the upper half of the outer wall of the composite brake drum 9 is first clamped circumferentially by the first clamping part 2, and then the drive cylinder 105 and the third drive motor 106 are started, wherein the third drive motor 106 drives the grinding disc 5 to rotate around its own axis, and the drive cylinder 105 drives the grinding disc 5 to move vertically and from bottom to top to grind the lower half of the outer wall of the composite brake drum 9.

[0052] After polishing is completed, the third driving motor 106 is turned off, the polishing disc 5 is moved along the vertical direction from top to bottom by the driving cylinder 105, and reset is realized; then the second driving motor 103 is started, and the first clamping part 2 is moved along the vertical direction downward by the sliding rod 102, wherein the second driving motor 103 drives the first clamping part 2 to rotate around the first axis; then the outer peripheral wall of the composite brake drum 9 is clamped in the circumferential direction by the second clamping part 3, and due to mechanical errors and the movable setting of the second clamping part 3, the second clamping part 3 can move relative to the first clamping part 2 during clamping the outer peripheral wall of the composite brake drum 9, and simultaneously drives the rotating shaft 4 to move relative to the first clamping part 2.

[0053] After the outer peripheral wall of the composite brake drum 9 is clamped in the circumferential direction by the second clamping part 3, the first clamping part 2 drives the second clamping part 3 and the rotating shaft 4 to rotate simultaneously by the composite brake drum 9, and then the position of the rotating shaft 4 is adjusted under the action of the adjusting assembly 6, so that the axis of the rotating shaft 4 coincides with the first axis.

[0054] Then the rotating shaft 4 is switched to the second state, so that the rotating shaft 4 and the second clamping part 3 are fixedly connected, and the rotating shaft 4 can only rotate around its own axis relative to the machine base 1, then the second driving motor 103 is turned off to stop the rotation of the first clamping part 2 around the first axis, and the clamping of the outer peripheral wall of the composite brake drum 9 is released, then the first clamping part 2 is moved upward along the vertical direction by the sliding rod 102 to separate from the composite brake drum 9; then the rotating shaft 4 is driven to rotate around its own axis, the composite brake drum 9 is driven to rotate by the second clamping part 3, and then the driving cylinder 105 and the third driving motor 106 are started, wherein the third driving motor 106 drives the polishing disc 5 to rotate around its own axis, and the driving cylinder 105 drives the polishing disc 5 to move along the vertical direction from bottom to top to polish the upper half of the outer peripheral wall of the composite brake drum 9.

[0055] Through the above series of precise and coordinated operations, the surface treatment device for the composite brake drum can effectively solve the coaxiality deviation problem faced by the existing polishing equipment in polishing the outer peripheral wall of the composite brake drum 9, and bring many significant technical effects:

[0056] One is in the polishing stability, because in the process of switching clamping and polishing, the axis of the rotating shaft 4 is accurately coincided with the first axis by the adjusting assembly 6, the problem of different coaxiality of clamping centers caused by two clamping is maximally eliminated, so that the composite brake drum 9 can be clamped firmly in the whole polishing process, to a certain extent, the hidden danger of slight shaking during polishing is eliminated, the smooth and continuous progress of polishing operation is ensured, and a solid foundation is laid for high-precision polishing.

[0057] Secondly, the polishing effect is accurate and coaxial, so that the contact between the polishing disc 5 and the outer wall of the composite brake drum 9 is more uniform and stable, effectively avoiding uneven polishing; and when polishing any part of the outer wall of the composite brake drum 9, the polishing depth and smoothness can be ensured to be highly consistent, so that the surface quality of the outer wall of the finished composite brake drum 9 is greatly improved, meeting more stringent quality standards, reducing subsequent defective screening and rework processes, and improving overall production efficiency.

[0058] Thirdly, in terms of polishing efficiency, there is no need to repeatedly adjust the clamping position due to coaxiality deviation as in traditional equipment, reducing unnecessary preparation time and operation steps; and the entire polishing process is compact and smooth, completing the polishing of different areas of the outer wall of the composite brake drum 9 at one time, thereby greatly shortening the polishing cycle of a single composite brake drum 9.

[0059] In a further embodiment, the adjusting assembly 6 is arranged to include a rotating disc 601 and a damping part 602, the rotating disc 601 is arranged on the machine base 1, when the rotating shaft 4 is in the first state, the rotating disc 601 can rotate around its own axis; when the rotating shaft 4 is in the second state, the rotating disc 601 and the machine base 1 are fixedly connected; a sliding hole 6011 is formed on the disc surface of the rotating disc 601, the track shape of the sliding hole 6011 is a spiral line; the rotating shaft 4 is inserted and assembled in the sliding hole 6011 and can move along the sliding hole 6011; the damping part 602 is configured to hinder the movement of the rotating shaft 4.

[0060] Specifically, as shown in Figure 5 , the rotating disc 601 and the support ring 107 are coaxially arranged, the rotating disc 601 is arranged in a T-shaped structure, and the large disc of the rotating disc 601 and the first sub-ring of the support ring 107 are arranged at intervals, the small disc of the rotating disc 601 abuts against the top of the second sub-ring of the support ring 107, and the outer wall of the small disc of the rotating disc 601 and the inner wall of the first sub-ring of the support ring 107 are coaxially arranged, so that the rotating disc 601 has a determined position; as shown in Figure 2 , the sliding hole 6011 is arranged in a spiral line structure extending from the inside to the outside and in a counterclockwise direction.

[0061] More specifically, the second clamping part 3 movably abuts against the top of the rotating disc 601, so that the second clamping part 3 has a determined position.

[0062] In order to make the rotating disc 601 have different motion forms when the rotating shaft 4 is in different states, the support ring 107 is provided as an electromagnet, and the rotating disc 601 is provided as being made of a magnetic material such as iron, cobalt, nickel or the like; when the rotating shaft 4 is in the first state, the support ring 107 is in a non-powered state, so that the rotating disc 601 can rotate around its own axis; when the rotating shaft 4 is in the second state, the support ring 107 is in a powered state, so that the rotating disc 601 is magnetically adsorbed on the support ring 107, so that the position of the rotating disc 601 is fixed, thereby avoiding affecting the coincidence between the axis of the rotating shaft 4 and the first axis.

[0063] In use, after the second clamping part 3 clamps the outer peripheral wall of the composite brake drum 9 in the circumferential direction, the first clamping part 2 drives the second clamping part 3 and the rotating shaft 4 to rotate simultaneously through the composite brake drum 9, at this time, the second clamping part 3 and the rotating shaft 4 both revolve around the first axis.

[0064] In the process of revolving of the rotating shaft 4 around the first axis, the rotating shaft 4 continuously pushes on the inner and outer vortex side walls of the sliding hole 6011, and under the pushing of the rotating shaft 4, the rotating disc 601 simultaneously rotates around its own axis, so that the rotating shaft 4 can simultaneously move outward along the sliding hole 6011, and for each unit distance of the rotating shaft 4, the rotating disc 601 approximately rotates one circle, so that each point on the vortex line represented by the sliding hole 6011 revolves around the center of the rotating disc 601, thereby forming innumerable concentric circular tracks; with the continuous revolution of the rotating shaft 4, when the point position represented by the rotating shaft 4 moves to the circular track capable of covering the point position of the first axis, with the movement of the rotating shaft 4, the rotating shaft 4 can move to the position where the axis coincides with the first axis, at this time, the rotating shaft 4 does not contact with the inner and outer vortex side walls of the sliding hole 6011, at this time, the rotating disc 601 remains stationary; in the above process, under the damping action of the damping part 602, the rotating shaft 4 can only slowly move along the sliding hole 6011, avoiding crossing the circular track capable of covering the point position of the first axis.

[0065] Then the rotating shaft 4 is switched to the second state, so that the rotating shaft 4 and the second clamping part 3 are fixedly connected, and the rotating shaft 4 can only rotate around its own axis relative to the machine base 1; then the second driving motor 103 is turned off to stop the rotation of the first clamping part 2 around the first axis, and the clamping of the outer peripheral wall of the composite brake drum 9 is released, and then the first clamping part 2 is driven by the sliding rod 102 to move upward in the vertical direction to disengage from the composite brake drum 9; then the rotating shaft 4 is driven to rotate around its own axis, and the composite brake drum 9 is driven to rotate by the second clamping part 3, and then the driving cylinder 105 and the third driving motor 106 are started, wherein the third driving motor 106 drives the polishing disc 5 to rotate around its own axis, and the driving cylinder 105 drives the polishing disc 5 to move upward in the vertical direction to polish the upper half of the outer peripheral wall of the composite brake drum 9.

[0066] In further embodiments, the damping part 602 can be provided to include an elastic member, which is inserted into the sliding hole 6011 and connected between the rotating shaft 4 and the rotating disc 601.

[0067] In particular to the present embodiment, the elastic member is provided as a compression spring 6021, as shown in Figure 2 The outer end of the compression spring 6021 is fixedly connected to the outer end wall of the sliding hole 6011, and the inner end of the compression spring 6021 abuts against the circumferential side wall of the rotating shaft 4. Under the action of the compression spring 6021, the rotating shaft 4 has a tendency to move inward along the sliding hole 6011, thereby being able to play a damping effect.

[0068] In further embodiments, in order to improve the damping effect of the compression spring 6021, a stop block 6022 is fixedly provided at the inner end of the compression spring 6021, and the surface of the stop block 6022 in contact with the rotating shaft 4 is an arc surface, so that the contact between the stop block 6022 and the rotating shaft 4 is more sufficient, avoiding the problem of slipping only when the compression spring 6021 and the rotating shaft 4 are in contact.

[0069] In other embodiments, in order to improve the smoothness of the rotating disc 601, the surface treatment device for the composite brake drum is provided to further include a plurality of rolling balls 7, which are all inserted into the machine base 1 and can freely roll, so that the rotating disc 601 and the machine base 1 form a rolling fit.

[0070] In particular to the present embodiment, as shown in Figure 5 The rolling balls 7 are inserted into the top of the first sub-ring of the support ring 107, and the number can be provided as eight. The eight rolling balls 7 are evenly arranged in the circumferential direction and jointly abut against the bottom of the large disc of the rotating disc 601, so that the rotating disc 601 and the machine base 1 form a rolling fit, thereby being able to reduce the resistance received by the rotating disc 601 when rotating.

[0071] In further embodiments, in order to further improve the smoothness of the rotating disc 601, as shown in Figure 2 The rolling balls 7 can also be provided as twelve, and two by two, a total of six groups. The six groups are evenly arranged in the circumferential direction, and the two rolling balls 7 in the same group are arranged in the radial direction of the rotating disc 601; as shown in Figure 5 The two rolling balls 7 in the same group jointly roll in contact with the bottom of the second clamping part 3, so as to be able to reduce the resistance received by the rotating disc 601 and the second clamping part 3 when rotating and moving.

[0072] In other embodiments, in order to facilitate switching the state of the rotating shaft 4, the rotating shaft 4 and the machine base 1 and the second clamping part 3 are all provided as closeable magnetic connections, so as to switch the state of the rotating shaft 4.

[0073] Specific to the embodiment, the spline board can be provided as an electromagnet, and the mounting ring 401 and the second clamping part 3 can be provided as being made of a magnetic material, such as iron, cobalt, nickel, etc.; when the support ring 107 and the spline board are in a non-powered state, at this time the rotating shaft 4 and the rotating disc 601 are in a free state, and the rotating shaft 4 is in a first state; when the support ring 107 and the spline board are in a powered state, at this time the rotating disc 601 and the mounting ring 401 are both magnetically adsorbed on the support ring 107, so that the position of the rotating disc 601 is fixed, and the position of the rotating shaft 4 in the horizontal direction is fixed, at this time the rotating shaft 4 can only rotate around its own axis, and the second clamping part 3 is magnetically adsorbed on the rotating shaft 4 so as to rotate with the rotating shaft 4, and the rotating shaft 4 is in a second state.

[0074] In further embodiments, for the convenience of simplifying the structure, a smaller current can be introduced into the support ring 107 before the rotating shaft 4 is switched to the second state, so that the support ring 107 generates a smaller magnetic force, and then the mounting ring 401 and the support ring 107 are magnetically connected, and under the action of the magnetic connection, the movement of the rotating shaft 4 in the horizontal direction will be subject to a certain resistance, so as to replace the damping part 602.

[0075] In further embodiments, in order to avoid the rotating disc 601 from moving too fast under the pushing of the rotating shaft 4 and causing the rotating shaft 4 to cross the circular track covering the point where the first axis is located, a smaller current is introduced into the support ring 107 before the rotating shaft 4 is switched to the second state, so that the support ring 107 generates a smaller magnetic force, and then the rotating disc 601 and the support ring 107 are magnetically connected, and under the action of the magnetic connection, the rotating disc 601 will be subject to a certain resistance when rotating around its own axis, so as to avoid moving too fast.

[0076] In other embodiments, the surface treatment device for the composite brake drum is provided as further comprising a driving assembly 8 configured to be able to provide a driving force for the rotating shaft 4 to rotate.

[0077] In further embodiments, the driving assembly 8 is provided as comprising a first driving motor 801 and a connecting piece, the first driving motor 801 being arranged on the machine base 1; and the connecting piece being connected between the first driving motor 801 and the rotating shaft 4.

[0078] Specific to the embodiment, as shown in Figure 3 and Figure 5 the first driving motor 801 is inserted into the columnar cavity 108, and the motor shaft of the first driving motor 801 is arranged upward in the vertical direction and connected with the rotating shaft 4, so that the rotating shaft 4 can be driven to rotate around its own axis when the rotating shaft 4 and the motor shaft of the first driving motor 801 are coaxial or non-coaxial.

[0079] In further embodiments, the connecting member is provided as a cross slider coupling 802.

[0080] In particular to the present embodiment, the cross slider coupling 802 is provided as consisting of a lower disc 8021, a middle disc 8022 and an upper disc 8023, wherein the lower disc 8021 is fixed and coaxially arranged on top of the motor shaft of the first driving motor 801, a first groove is arranged on top of the lower disc 8021, the first groove is provided as a strip structure and passes through the axis of the lower disc 8021, and both ends of the first groove penetrate the circumferential side wall of the lower disc 8021; a second groove is arranged on the bottom of the upper disc 8023, the second groove is provided as a strip structure and passes through the axis of the upper disc 8023, and both ends of the second groove penetrate the circumferential side wall of the upper disc 8023; a slide convex is arranged on both disc faces of the middle disc 8022, the slide convex is provided as a strip structure and passes through the axis of the middle disc 8022, and both ends of the slide convex extend to the circumferential side wall of the middle disc 8022, the two slide convexes are arranged at an angle of 90 degrees, and the two slide convexes are respectively slidably inserted into the first groove and the second groove when the middle disc 8022 is installed.

[0081] In other embodiments, the first clamping part 2 and / or the second clamping part 3 can be provided as a three-jaw chuck.

[0082] In particular to the present embodiment, when the first clamping part 2 is provided as a three-jaw chuck, the first axis coincides with the axis of the first clamping part 2, and the driving force for moving the jaws of the first clamping part 2 can be provided by a machine, hydraulic pressure or pneumatic pressure; when the second clamping part 3 is provided as a three-jaw chuck, the driving force for moving the jaws of the second clamping part 3 can be provided by hydraulic pressure or pneumatic pressure.

[0083] In other embodiments, the first clamping part 2 and / or the second clamping part 3 can also be provided as a four-jaw chuck.

[0084] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0085] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application.

Claims

1. A surface treatment device for a composite brake drum, characterized in that: The surface treatment device for the composite brake drum comprises: base; a first clamping portion, disposed on the base and configured to clamp the outer peripheral wall of the composite brake drum along a circumferential direction; the first clamping portion has a first axis and is rotatable about the first axis; a second clamping portion movably disposed on the base and capable of moving relative to the first clamping portion in a direction toward or away from each other, and configured to clamp the outer peripheral wall of the composite brake drum in a circumferential direction; a rotating shaft, inserted into the second clamping portion and capable of rotating about its own axis; the rotating shaft has a first state and a second state, wherein in the first state, the rotating shaft, the machine base, and the second clamping portion are all movably connected; in the second state, the rotating shaft and the second clamping portion are fixedly connected and can only rotate about its own axis relative to the machine base; a grinding disc, disposed on the machine base and capable of rotating about its own axis and sliding relative to the first clamping portion in a direction extending along the first axis, so as to be able to grind the outer peripheral wall of the composite brake drum; an adjustment assembly configured to adjust the position of the rotating shaft so that the axis of the rotating shaft coincides with the first axis; The adjustment assembly includes a rotating disk and a damping portion, wherein the rotating disk is disposed on the base. When the rotating shaft is in the first state, the rotating disk can rotate about its own axis; when the rotating shaft is in the second state, the rotating disk and the base are fixedly connected; a sliding hole is formed on the disk surface of the rotating disk, and the trajectory of the sliding hole is in the shape of a spiral line; the rotating shaft is inserted into the sliding hole and can move along the sliding hole; the damping portion is configured to hinder the movement of the rotating shaft; The damping part includes an elastic member, which is inserted into the sliding hole and connected between the rotating shaft and the rotating disk.

2. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The elastic member is configured as a compression spring.

3. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The surface treatment device for the composite brake drum further comprises a plurality of balls, which are all inserted into the base and can roll freely, so as to form a rolling fit between the rotating disk and the base.

4. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The rotating shaft, the machine base and the second clamping portion are all connected by closable magnetic connections to switch the state of the rotating shaft.

5. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The surface treatment device for a composite brake drum further includes a driving assembly configured to provide a driving force for rotating the rotating shaft.

6. The surface treatment device for a composite brake drum according to claim 5, characterized in that: The driving assembly includes a first driving motor and a connecting member. The first driving motor is arranged on the machine base; the connecting member is connected between the first driving motor and the rotating shaft.

7. The surface treatment device for a composite brake drum according to claim 6, characterized in that: The connecting member is configured as an Oldham coupling.

8. The surface treatment device for a composite brake drum according to claim 1, characterized in that: The first clamping part and / or the second clamping part is configured as a three-jaw chuck.

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